Adding upstream version 0.3.65.upstream/0.3.65upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

24 files changed, 17023 insertions, 0 deletions

diff --git a/spa/plugins/alsa/acp-tool.c b/spa/plugins/alsa/acp-tool.c
new file mode 100644
index 0000000..0fc92a4
--- /dev/null
+++ b/spa/plugins/alsa/acp-tool.c
@@ -0,0 +1,786 @@
+/* ALSA card profile test
+ *
+ * Copyright © 2020 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <time.h>
+#include <stdbool.h>
+#include <getopt.h>
+
+#include <spa/utils/string.h>
+
+#include <acp/acp.h>
+
+#define WHITESPACE	"\n\r\t "
+
+struct data {
+	int verbose;
+	int card_index;
+	char *properties;
+	struct acp_card *card;
+	bool quit;
+};
+
+static void acp_debug_dict(struct acp_dict *dict, int indent)
+{
+	const struct acp_dict_item *it;
+	fprintf(stderr, "%*sproperties: (%d)\n", indent, "", dict->n_items);
+	acp_dict_for_each(it, dict) {
+		fprintf(stderr, "%*s%s = \"%s\"\n", indent+4, "", it->key, it->value);
+	}
+}
+
+static char *split_walk(char *str, const char *delimiter, size_t *len, char **state)
+{
+	char *s = *state ? *state : str;
+
+	if (*s == '\0')
+		return NULL;
+
+	*len = strcspn(s, delimiter);
+	*state = s + *len;
+	*state += strspn(*state, delimiter);
+	return s;
+}
+
+static int split_ip(char *str, const char *delimiter, int max_tokens, char *tokens[])
+{
+	char *state = NULL, *s;
+	size_t len;
+	int n = 0;
+
+	while (true) {
+		if ((s = split_walk(str, delimiter, &len, &state)) == NULL)
+			break;
+		tokens[n++] = s;
+		if (n >= max_tokens)
+			break;
+		s[len] = '\0';
+	}
+	return n;
+}
+
+
+static void card_props_changed(void *data)
+{
+	struct data *d = data;
+	struct acp_card *card = d->card;
+	fprintf(stderr, "*** properties changed:\n");
+	acp_debug_dict(&card->props, 4);
+	fprintf(stderr, "***\n");
+}
+
+static void card_profile_changed(void *data, uint32_t old_index, uint32_t new_index)
+{
+	struct data *d = data;
+	struct acp_card *card = d->card;
+	struct acp_card_profile *op = card->profiles[old_index];
+	struct acp_card_profile *np = card->profiles[new_index];
+	fprintf(stderr, "*** profile changed from %s to %s\n", op->name, np->name);
+}
+
+static void card_profile_available(void *data, uint32_t index,
+		enum acp_available old, enum acp_available available)
+{
+	struct data *d = data;
+	struct acp_card *card = d->card;
+	struct acp_card_profile *p = card->profiles[index];
+	fprintf(stderr, "*** profile %s available %s\n", p->name, acp_available_str(available));
+}
+
+static void card_port_available(void *data, uint32_t index,
+		enum acp_available old, enum acp_available available)
+{
+	struct data *d = data;
+	struct acp_card *card = d->card;
+	struct acp_port *p = card->ports[index];
+	fprintf(stderr, "*** port %s available %s\n", p->name, acp_available_str(available));
+}
+
+static void on_volume_changed(void *data, struct acp_device *dev)
+{
+	float vol;
+	acp_device_get_volume(dev, &vol, 1);
+	fprintf(stderr, "*** volume %s changed to %f\n", dev->name, vol);
+}
+
+static void on_mute_changed(void *data, struct acp_device *dev)
+{
+	bool mute;
+	acp_device_get_mute(dev, &mute);
+	fprintf(stderr, "*** mute %s changed to %d\n", dev->name, mute);
+}
+
+static const struct acp_card_events card_events = {
+	ACP_VERSION_CARD_EVENTS,
+        .props_changed = card_props_changed,
+        .profile_changed = card_profile_changed,
+        .profile_available = card_profile_available,
+        .port_available = card_port_available,
+	.volume_changed = on_volume_changed,
+	.mute_changed = on_mute_changed,
+};
+
+static ACP_PRINTF_FUNC(6,0) void log_func(void *data,
+		int level, const char *file, int line, const char *func,
+		const char *fmt, va_list arg)
+{
+	vfprintf(stderr, fmt, arg);
+	fprintf(stderr, "\n");
+}
+
+static void show_prompt(struct data *data)
+{
+	fprintf(stderr, ">>>");
+}
+
+struct command {
+        const char *name;
+        const char *args;
+        const char *alias;
+        const char *description;
+        int (*func) (struct data *data, const struct command *cmd, int argc, char *argv[]);
+	void *extra;
+};
+
+static int cmd_help(struct data *data, const struct command *cmd, int argc, char *argv[]);
+
+static int cmd_quit(struct data *data, const struct command *cmd, int argc, char *argv[])
+{
+	data->quit = true;
+	return 0;
+}
+
+static void print_profile(struct data *data, struct acp_card_profile *p, int indent, int level);
+static void print_device(struct data *data, struct acp_device *d, int indent, int level);
+
+static void print_port(struct data *data, struct acp_port *p, int indent, int level)
+{
+	uint32_t i;
+
+	fprintf(stderr, "%*s  %c port %u: name:\"%s\" direction:%s prio:%d (available: %s)\n",
+			indent, "", p->flags & ACP_PORT_ACTIVE ? '*' : ' ', p->index,
+			p->name, acp_direction_str(p->direction), p->priority,
+			acp_available_str(p->available));
+	if (level > 0) {
+		acp_debug_dict(&p->props, indent + 8);
+	}
+	if (level > 1) {
+		fprintf(stderr, "%*sprofiles: (%d)\n", indent+8, "", p->n_profiles);
+		for (i = 0; i < p->n_profiles; i++) {
+			struct acp_card_profile *pr = p->profiles[i];
+			print_profile(data, pr, indent + 8, 0);
+		}
+		fprintf(stderr, "%*sdevices: (%d)\n", indent+8, "", p->n_devices);
+		for (i = 0; i < p->n_devices; i++) {
+			struct acp_device *d = p->devices[i];
+			print_device(data, d, indent + 8, 0);
+		}
+	}
+}
+
+static void print_device(struct data *data, struct acp_device *d, int indent, int level)
+{
+	const char **s;
+	uint32_t i;
+
+	fprintf(stderr, "%*s  %c device %u: direction:%s name:\"%s\" prio:%d flags:%08x devices: ",
+			indent, "", d->flags & ACP_DEVICE_ACTIVE ? '*' : ' ', d->index,
+			acp_direction_str(d->direction), d->name, d->priority, d->flags);
+	for (s = d->device_strings; *s; s++)
+		fprintf(stderr, "\"%s\" ", *s);
+	fprintf(stderr, "\n");
+	if (level > 0) {
+		fprintf(stderr, "%*srate:%d channels:%d\n", indent+8, "",
+				d->format.rate_mask, d->format.channels);
+		acp_debug_dict(&d->props, indent + 8);
+	}
+	if (level > 1) {
+		fprintf(stderr, "%*sports: (%d)\n", indent+8, "", d->n_ports);
+		for (i = 0; i < d->n_ports; i++) {
+			struct acp_port *p = d->ports[i];
+			print_port(data, p, indent + 8, 0);
+		}
+	}
+}
+
+static void print_profile(struct data *data, struct acp_card_profile *p, int indent, int level)
+{
+	uint32_t i;
+
+	fprintf(stderr, "%*s  %c profile %u: name:\"%s\" prio:%d (available: %s)\n",
+			indent, "", p->flags & ACP_PROFILE_ACTIVE ? '*' : ' ', p->index,
+			p->name, p->priority, acp_available_str(p->available));
+	if (level > 0) {
+		fprintf(stderr, "%*sdescription:\"%s\"\n",
+				indent+8, "", p->description);
+	}
+	if (level > 1) {
+		fprintf(stderr, "%*sdevices: (%d)\n", indent+8, "", p->n_devices);
+		for (i = 0; i < p->n_devices; i++) {
+			struct acp_device *d = p->devices[i];
+			print_device(data, d, indent + 8, 0);
+		}
+	}
+}
+
+static void print_card(struct data *data, struct acp_card *card, int indent, int level)
+{
+	fprintf(stderr, "%*scard %d: profiles:%d devices:%d ports:%d\n", indent, "",
+			card->index, card->n_profiles, card->n_devices, card->n_ports);
+	if (level > 0) {
+		acp_debug_dict(&card->props, 4);
+	}
+}
+
+static int cmd_info(struct data *data, const struct command *cmd, int argc, char *argv[])
+{
+	struct acp_card *card = data->card;
+	print_card(data, card, 0, 2);
+	return 0;
+}
+
+static int cmd_card(struct data *data, const struct command *cmd, int argc, char *argv[])
+{
+	if (argc < 2) {
+		fprintf(stderr, "arguments: <card_index> missing\n");
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int cmd_list(struct data *data, const struct command *cmd, int argc, char *argv[])
+{
+	struct acp_card *card = data->card;
+	uint32_t i;
+	int level = 0;
+
+	if (spa_streq(cmd->name, "list-verbose"))
+		level = 2;
+
+	print_card(data, card, 0, level);
+	for (i = 0; i < card->n_profiles; i++)
+		print_profile(data, card->profiles[i], 0, level);
+
+	for (i = 0; i < card->n_ports; i++)
+		print_port(data, card->ports[i], 0, level);
+
+	for (i = 0; i < card->n_devices; i++)
+		print_device(data, card->devices[i], 0, level);
+
+	return 0;
+}
+
+static int cmd_list_profiles(struct data *data, const struct command *cmd, int argc, char *argv[])
+{
+	uint32_t i;
+	struct acp_card *card = data->card;
+
+	if (argc > 1) {
+		i = atoi(argv[1]);
+		if (i >= card->n_profiles)
+			return -EINVAL;
+		print_profile(data, card->profiles[i], 0, 2);
+	} else {
+		for (i = 0; i < card->n_profiles; i++)
+			print_profile(data, card->profiles[i], 0, 0);
+	}
+	return 0;
+}
+
+static int cmd_set_profile(struct data *data, const struct command *cmd, int argc, char *argv[])
+{
+	struct acp_card *card = data->card;
+	uint32_t index;
+
+	if (argc > 1)
+		index = atoi(argv[1]);
+	else
+		index = card->active_profile_index;
+
+	return acp_card_set_profile(card, index, 0);
+}
+
+static int cmd_list_ports(struct data *data, const struct command *cmd, int argc, char *argv[])
+{
+	uint32_t i;
+	struct acp_card *card = data->card;
+
+	if (argc > 1) {
+		i = atoi(argv[1]);
+		if (i >= card->n_ports)
+			return -EINVAL;
+		print_port(data, card->ports[i], 0, 2);
+	} else {
+		for (i = 0; i < card->n_ports; i++)
+			print_port(data, card->ports[i], 0, 0);
+	}
+	return 0;
+}
+
+static int cmd_set_port(struct data *data, const struct command *cmd, int argc, char *argv[])
+{
+	struct acp_card *card = data->card;
+	uint32_t dev_id, port_id;
+
+	if (argc < 3) {
+		fprintf(stderr, "arguments: <device_id> <port_id> missing\n");
+		return -EINVAL;
+	}
+	dev_id = atoi(argv[1]);
+	port_id = atoi(argv[2]);
+
+	if (dev_id >= card->n_devices)
+		return -EINVAL;
+
+	return acp_device_set_port(card->devices[dev_id], port_id, 0);
+}
+
+static int cmd_list_devices(struct data *data, const struct command *cmd, int argc, char *argv[])
+{
+	uint32_t i;
+	struct acp_card *card = data->card;
+
+	if (argc > 1) {
+		i = atoi(argv[1]);
+		if (i >= card->n_devices)
+			return -EINVAL;
+		print_device(data, card->devices[i], 0, 2);
+	} else {
+		for (i = 0; i < card->n_devices; i++)
+			print_device(data, card->devices[i], 0, 0);
+	}
+	return 0;
+}
+
+static int cmd_get_volume(struct data *data, const struct command *cmd, int argc, char *argv[])
+{
+	struct acp_card *card = data->card;
+	uint32_t dev_id;
+	float vol;
+
+	if (argc < 2) {
+		fprintf(stderr, "arguments: <device_id> missing\n");
+		return -EINVAL;
+	}
+	dev_id = atoi(argv[1]);
+	if (dev_id >= card->n_devices)
+		return -EINVAL;
+
+	acp_device_get_volume(card->devices[dev_id], &vol, 1);
+
+	fprintf(stderr, "volume: %f\n", vol);
+	return 0;
+}
+
+static int cmd_set_volume(struct data *data, const struct command *cmd, int argc, char *argv[])
+{
+	struct acp_card *card = data->card;
+	uint32_t dev_id;
+	float vol;
+
+	if (argc < 3) {
+		fprintf(stderr, "arguments: <device_id> <volume> missing\n");
+		return -EINVAL;
+	}
+	dev_id = atoi(argv[1]);
+	vol = atof(argv[2]);
+
+	if (dev_id >= card->n_devices)
+		return -EINVAL;
+
+	return acp_device_set_volume(card->devices[dev_id], &vol, 1);
+}
+
+static int adjust_volume(struct data *data, const struct command *cmd, int argc, char *argv[], float adjust)
+{
+	struct acp_card *card = data->card;
+	uint32_t dev_id;
+	float vol;
+
+	if (argc < 2) {
+		fprintf(stderr, "arguments: <device_id> missing\n");
+		return -EINVAL;
+	}
+	dev_id = atoi(argv[1]);
+	if (dev_id >= card->n_devices)
+		return -EINVAL;
+	acp_device_get_volume(card->devices[dev_id], &vol, 1);
+	vol += adjust;
+	acp_device_set_volume(card->devices[dev_id], &vol, 1);
+	fprintf(stderr, "volume: %f\n", vol);
+	return 0;
+}
+
+static int cmd_inc_volume(struct data *data, const struct command *cmd, int argc, char *argv[])
+{
+	return adjust_volume(data, cmd, argc, argv, 0.2);
+}
+
+static int cmd_dec_volume(struct data *data, const struct command *cmd, int argc, char *argv[])
+{
+	return adjust_volume(data, cmd, argc, argv, -0.2);
+}
+
+static int cmd_get_mute(struct data *data, const struct command *cmd, int argc, char *argv[])
+{
+	struct acp_card *card = data->card;
+	uint32_t dev_id;
+	bool mute;
+
+	if (argc < 2) {
+		fprintf(stderr, "arguments: <device_id> missing\n");
+		return -EINVAL;
+	}
+	dev_id = atoi(argv[1]);
+	if (dev_id >= card->n_devices)
+		return -EINVAL;
+
+	acp_device_get_mute(card->devices[dev_id], &mute);
+
+	fprintf(stderr, "muted: %s\n", mute ? "yes" : "no");
+	return 0;
+}
+
+static int cmd_set_mute(struct data *data, const struct command *cmd, int argc, char *argv[])
+{
+	struct acp_card *card = data->card;
+	uint32_t dev_id;
+	bool mute;
+
+	if (argc < 3) {
+		fprintf(stderr, "arguments: <device_id> <mute> missing\n");
+		return -EINVAL;
+	}
+	dev_id = atoi(argv[1]);
+	mute = atoi(argv[2]);
+	if (dev_id >= card->n_devices)
+		return -EINVAL;
+
+	acp_device_set_mute(card->devices[dev_id], mute);
+	fprintf(stderr, "muted: %s\n", mute ? "yes" : "no");
+	return 0;
+}
+
+static int cmd_toggle_mute(struct data *data, const struct command *cmd, int argc, char *argv[])
+{
+	struct acp_card *card = data->card;
+	uint32_t dev_id;
+	bool mute;
+
+	if (argc < 2) {
+		fprintf(stderr, "arguments: <device_id> missing\n");
+		return -EINVAL;
+	}
+	dev_id = atoi(argv[1]);
+	if (dev_id >= card->n_devices)
+		return -EINVAL;
+	acp_device_get_mute(card->devices[dev_id], &mute);
+	mute = !mute;
+	acp_device_set_mute(card->devices[dev_id], mute);
+	fprintf(stderr, "muted: %s\n", mute ? "yes" : "no");
+	return 0;
+}
+
+static const struct command command_list[] = {
+	{ "help",          "",           "h",   "Show available commands", cmd_help },
+	{ "quit",          "",           "q",   "Quit", cmd_quit },
+	{ "card",          "<id>",       "c",   "Probe card", cmd_card },
+	{ "info",          "",           "i",   "List card info", cmd_info },
+	{ "list",          "",           "l",   "List all objects", cmd_list },
+	{ "list-verbose",  "",           "lv",  "List all data", cmd_list },
+	{ "list-profiles", "[id]",       "lpr", "List profiles", cmd_list_profiles },
+	{ "set-profile",   "<id>",       "spr", "Activate a profile", cmd_set_profile },
+	{ "list-ports",    "[id]",       "lp",  "List ports", cmd_list_ports },
+	{ "set-port",      "<id>",       "sp",  "Activate a port", cmd_set_port },
+	{ "list-devices",  "[id]",       "ld",  "List available devices", cmd_list_devices },
+	{ "get-volume",    "<id>",       "gv",  "Get volume from device", cmd_get_volume },
+	{ "set-volume",    "<id> <vol>", "v",   "Set volume on device", cmd_set_volume },
+	{ "inc-volume",    "<id>",       "v+",  "Increase volume on device", cmd_inc_volume },
+	{ "dec-volume",    "<id>",       "v-",  "Decrease volume on device", cmd_dec_volume },
+	{ "get-mute",      "<id>",       "gm",  "Get mute state from device", cmd_get_mute },
+	{ "set-mute",      "<id> <val>", "sm",  "Set mute on device", cmd_set_mute },
+	{ "toggle-mute",   "<id>",       "m",   "Toggle mute on device", cmd_toggle_mute },
+};
+#define N_COMMANDS	sizeof(command_list)/sizeof(command_list[0])
+
+static const struct command *find_command(struct data *data, const char *cmd)
+{
+	size_t i;
+	for (i = 0; i < N_COMMANDS; i++) {
+		if (spa_streq(command_list[i].name, cmd) ||
+		    spa_streq(command_list[i].alias, cmd))
+			return &command_list[i];
+	}
+	return NULL;
+}
+
+static int cmd_help(struct data *data, const struct command *cmd, int argc, char *argv[])
+{
+	size_t i;
+	fprintf(stderr, "Available commands:\n");
+	for (i = 0; i < N_COMMANDS; i++) {
+		fprintf(stdout, "\t%-15.15s %-10.10s\t%s (%s)\n",
+				command_list[i].name,
+				command_list[i].args,
+				command_list[i].description,
+				command_list[i].alias);
+	}
+	return 0;
+}
+
+static int run_command(struct data *data, int argc, char *argv[64])
+{
+	const struct command *command;
+	int res;
+
+	command = find_command(data, argv[0]);
+	if (command == NULL) {
+		fprintf(stderr, "unknown command %s\n", argv[0]);
+		cmd_help(data, NULL, argc, argv);
+		res = -EINVAL;
+	} else if (command->func) {
+		res = command->func(data, command, argc, argv);
+		if (res < 0) {
+			fprintf(stderr, "error: %s\n", strerror(-res));
+		}
+	} else {
+		res = -ENOTSUP;
+	}
+	return res;
+}
+
+static int handle_input(struct data *data)
+{
+	char buf[4096] = { 0, }, *p, *argv[64];
+	ssize_t r;
+	int res, argc;
+
+	if ((r = read(STDIN_FILENO, buf, sizeof(buf)-1)) < 0)
+		return -errno;
+	buf[r] = 0;
+
+	if (r == 0)
+		return -EPIPE;
+
+	if ((p = strchr(buf, '#')))
+                *p = '\0';
+
+	argc = split_ip(buf, WHITESPACE, 64, argv);
+	if (argc < 1)
+		return -EINVAL;
+
+	res = run_command(data, argc, argv);
+
+	if (!data->quit)
+		show_prompt(data);
+
+	return res;
+}
+
+static int do_probe(struct data *data)
+{
+	uint32_t n_items = 0;
+	struct acp_dict_item items[64];
+	struct acp_dict props;
+
+	acp_set_log_func(log_func, data);
+	acp_set_log_level(data->verbose);
+
+	items[n_items++] = ACP_DICT_ITEM_INIT("use-ucm", "true");
+	items[n_items++] = ACP_DICT_ITEM_INIT("verbose", data->verbose ? "true" : "false");
+	if (data->properties != NULL) {
+		char *p = data->properties, *e, f;
+
+		while (*p) {
+			const char *k, *v;
+
+			if ((e = strchr(p, '=')) == NULL)
+				break;
+			*e = '\0';
+			k = p;
+			p = e+1;
+
+			if (*p == '\"') {
+				p++;
+				f = '\"';
+			} else {
+				f = ' ';
+			}
+			if ((e = strchr(p, f)) == NULL &&
+			    (e = strchr(p, '\0')) == NULL)
+				break;
+			*e = '\0';
+			v = p;
+			p = e+1;
+			items[n_items++] = ACP_DICT_ITEM_INIT(k, v);
+			if (n_items == 64)
+				break;
+		}
+	}
+	props = ACP_DICT_INIT(items, n_items);
+
+	data->card = acp_card_new(data->card_index, &props);
+	if (data->card == NULL)
+		return -errno;
+	return 0;
+}
+
+static int do_prompt(struct data *data)
+{
+	struct pollfd *pfds;
+	int err, count;
+
+	acp_card_add_listener(data->card, &card_events, data);
+
+	count = acp_card_poll_descriptors_count(data->card);
+	if (count == 0)
+		fprintf(stderr, "card has no events\n");
+
+	count++;
+	pfds = alloca(sizeof(struct pollfd) * count);
+	pfds[0].fd = STDIN_FILENO;
+	pfds[0].events = POLLIN;
+
+	print_card(data, data->card, 0, 0);
+
+	fprintf(stderr, "type 'help' for usage.\n");
+	show_prompt(data);
+
+	while (!data->quit) {
+		unsigned short revents;
+
+		err = acp_card_poll_descriptors(data->card, &pfds[1], count-1);
+		if (err < 0)
+			return err;
+
+		err = poll(pfds, (unsigned int) count, -1);
+		if (err < 0)
+			return -errno;
+
+		if (pfds[0].revents & POLLIN) {
+			if ((err = handle_input(data)) < 0) {
+				if (err == -EPIPE)
+					break;
+			}
+		}
+
+		if (count < 2)
+			continue;
+
+		err = acp_card_poll_descriptors_revents(data->card, &pfds[1], count-1, &revents);
+		if (err < 0)
+			return err;
+
+		if (revents)
+			acp_card_handle_events(data->card);
+	}
+	return 0;
+}
+
+#define OPTIONS		"hvc:p:"
+static const struct option long_options[] = {
+	{ "help",	no_argument,		NULL, 'h'},
+	{ "verbose",	no_argument,		NULL, 'v'},
+
+	{ "card",	required_argument,	NULL, 'c' },
+	{ "properties",	required_argument,	NULL, 'p' },
+
+        { NULL, 0, NULL, 0 }
+};
+
+static void show_usage(struct data *data, const char *name, bool is_error)
+{
+	FILE *fp;
+
+	fp = is_error ? stderr : stdout;
+
+	fprintf(fp, "%s [options] [COMMAND]\n", name);
+	fprintf(fp,
+		"  -h, --help                            Show this help\n"
+		"  -v  --verbose                         Be verbose\n"
+		"  -c  --card                            Card number\n"
+		"  -p  --properties                      Extra properties:\n"
+		"                                         'key=value ... '\n"
+		"\n");
+	cmd_help(data, NULL, 0, NULL);
+}
+
+int main(int argc, char *argv[])
+{
+	int c, res;
+	int longopt_index = 0, ret;
+	struct data data = { 0, };
+
+	data.verbose = 1;
+
+	while ((c = getopt_long(argc, argv, OPTIONS, long_options, &longopt_index)) != -1) {
+		switch (c) {
+		case 'h':
+                        show_usage(&data, argv[0], false);
+                        return EXIT_SUCCESS;
+		case 'v':
+			data.verbose++;
+			break;
+		case 'c':
+			ret = atoi(optarg);
+			if (ret < 0) {
+				fprintf(stderr, "error: bad card %s\n", optarg);
+                                goto error_usage;
+			}
+			data.card_index = ret;
+			break;
+		case 'p':
+			data.properties = strdup(optarg);
+			break;
+                default:
+			fprintf(stderr, "error: unknown option '%c'\n", c);
+			goto error_usage;
+		}
+	}
+
+	if ((res = do_probe(&data)) < 0) {
+		fprintf(stderr, "failed to probe card: %s\n", strerror(-res));
+		return res;
+	}
+
+	if (optind < argc)
+		run_command(&data, argc - optind, &argv[optind]);
+	else
+		do_prompt(&data);
+
+	if (data.card)
+		acp_card_destroy(data.card);
+
+	free(data.properties);
+
+	return 0;
+
+error_usage:
+	show_usage(&data, argv[0], true);
+	return EXIT_FAILURE;
+}
diff --git a/spa/plugins/alsa/acp/acp.c b/spa/plugins/alsa/acp/acp.c
new file mode 100644
index 0000000..f9985b4
--- /dev/null
+++ b/spa/plugins/alsa/acp/acp.c
@@ -0,0 +1,1983 @@
+/* ALSA Card Profile
+ *
+ * Copyright © 2020 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "acp.h"
+#include "alsa-mixer.h"
+#include "alsa-ucm.h"
+
+#include <spa/utils/string.h>
+
+int _acp_log_level = 1;
+acp_log_func _acp_log_func;
+void *_acp_log_data;
+
+struct spa_i18n *acp_i18n;
+
+#define DEFAULT_RATE	48000
+
+#define VOLUME_ACCURACY (PA_VOLUME_NORM/100)  /* don't require volume adjustments to be perfectly correct. don't necessarily extend granularity in software unless the differences get greater than this level */
+
+static const uint32_t channel_table[PA_CHANNEL_POSITION_MAX] = {
+	[PA_CHANNEL_POSITION_MONO] = ACP_CHANNEL_MONO,
+
+	[PA_CHANNEL_POSITION_FRONT_LEFT] = ACP_CHANNEL_FL,
+	[PA_CHANNEL_POSITION_FRONT_RIGHT] = ACP_CHANNEL_FR,
+	[PA_CHANNEL_POSITION_FRONT_CENTER] = ACP_CHANNEL_FC,
+
+	[PA_CHANNEL_POSITION_REAR_CENTER] = ACP_CHANNEL_RC,
+	[PA_CHANNEL_POSITION_REAR_LEFT] = ACP_CHANNEL_RL,
+	[PA_CHANNEL_POSITION_REAR_RIGHT] = ACP_CHANNEL_RR,
+
+	[PA_CHANNEL_POSITION_LFE] = ACP_CHANNEL_LFE,
+	[PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER] = ACP_CHANNEL_FLC,
+	[PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER] = ACP_CHANNEL_FRC,
+
+	[PA_CHANNEL_POSITION_SIDE_LEFT] = ACP_CHANNEL_SL,
+	[PA_CHANNEL_POSITION_SIDE_RIGHT] = ACP_CHANNEL_SR,
+
+	[PA_CHANNEL_POSITION_AUX0] = ACP_CHANNEL_START_Aux + 0,
+	[PA_CHANNEL_POSITION_AUX1] = ACP_CHANNEL_START_Aux + 1,
+	[PA_CHANNEL_POSITION_AUX2] = ACP_CHANNEL_START_Aux + 2,
+	[PA_CHANNEL_POSITION_AUX3] = ACP_CHANNEL_START_Aux + 3,
+	[PA_CHANNEL_POSITION_AUX4] = ACP_CHANNEL_START_Aux + 4,
+	[PA_CHANNEL_POSITION_AUX5] = ACP_CHANNEL_START_Aux + 5,
+	[PA_CHANNEL_POSITION_AUX6] = ACP_CHANNEL_START_Aux + 6,
+	[PA_CHANNEL_POSITION_AUX7] = ACP_CHANNEL_START_Aux + 7,
+	[PA_CHANNEL_POSITION_AUX8] = ACP_CHANNEL_START_Aux + 8,
+	[PA_CHANNEL_POSITION_AUX9] = ACP_CHANNEL_START_Aux + 9,
+	[PA_CHANNEL_POSITION_AUX10] = ACP_CHANNEL_START_Aux + 10,
+	[PA_CHANNEL_POSITION_AUX11] = ACP_CHANNEL_START_Aux + 11,
+	[PA_CHANNEL_POSITION_AUX12] = ACP_CHANNEL_START_Aux + 12,
+	[PA_CHANNEL_POSITION_AUX13] = ACP_CHANNEL_START_Aux + 13,
+	[PA_CHANNEL_POSITION_AUX14] = ACP_CHANNEL_START_Aux + 14,
+	[PA_CHANNEL_POSITION_AUX15] = ACP_CHANNEL_START_Aux + 15,
+	[PA_CHANNEL_POSITION_AUX16] = ACP_CHANNEL_START_Aux + 16,
+	[PA_CHANNEL_POSITION_AUX17] = ACP_CHANNEL_START_Aux + 17,
+	[PA_CHANNEL_POSITION_AUX18] = ACP_CHANNEL_START_Aux + 18,
+	[PA_CHANNEL_POSITION_AUX19] = ACP_CHANNEL_START_Aux + 19,
+	[PA_CHANNEL_POSITION_AUX20] = ACP_CHANNEL_START_Aux + 20,
+	[PA_CHANNEL_POSITION_AUX21] = ACP_CHANNEL_START_Aux + 21,
+	[PA_CHANNEL_POSITION_AUX22] = ACP_CHANNEL_START_Aux + 22,
+	[PA_CHANNEL_POSITION_AUX23] = ACP_CHANNEL_START_Aux + 23,
+	[PA_CHANNEL_POSITION_AUX24] = ACP_CHANNEL_START_Aux + 24,
+	[PA_CHANNEL_POSITION_AUX25] = ACP_CHANNEL_START_Aux + 25,
+	[PA_CHANNEL_POSITION_AUX26] = ACP_CHANNEL_START_Aux + 26,
+	[PA_CHANNEL_POSITION_AUX27] = ACP_CHANNEL_START_Aux + 27,
+	[PA_CHANNEL_POSITION_AUX28] = ACP_CHANNEL_START_Aux + 28,
+	[PA_CHANNEL_POSITION_AUX29] = ACP_CHANNEL_START_Aux + 29,
+	[PA_CHANNEL_POSITION_AUX30] = ACP_CHANNEL_START_Aux + 30,
+	[PA_CHANNEL_POSITION_AUX31] = ACP_CHANNEL_START_Aux + 31,
+
+	[PA_CHANNEL_POSITION_TOP_CENTER] = ACP_CHANNEL_TC,
+
+	[PA_CHANNEL_POSITION_TOP_FRONT_LEFT] = ACP_CHANNEL_TFL,
+	[PA_CHANNEL_POSITION_TOP_FRONT_RIGHT] = ACP_CHANNEL_TFR,
+	[PA_CHANNEL_POSITION_TOP_FRONT_CENTER] = ACP_CHANNEL_TFC,
+
+	[PA_CHANNEL_POSITION_TOP_REAR_LEFT] = ACP_CHANNEL_TRL,
+	[PA_CHANNEL_POSITION_TOP_REAR_RIGHT] = ACP_CHANNEL_TRR,
+	[PA_CHANNEL_POSITION_TOP_REAR_CENTER] = ACP_CHANNEL_TRC,
+};
+
+static const char *channel_names[] = {
+	[ACP_CHANNEL_UNKNOWN] = "UNK",
+	[ACP_CHANNEL_NA] = "NA",
+	[ACP_CHANNEL_MONO] = "MONO",
+	[ACP_CHANNEL_FL] = "FL",
+	[ACP_CHANNEL_FR] = "FR",
+	[ACP_CHANNEL_FC] = "FC",
+	[ACP_CHANNEL_LFE] = "LFE",
+	[ACP_CHANNEL_SL] = "SL",
+	[ACP_CHANNEL_SR] = "SR",
+	[ACP_CHANNEL_FLC] = "FLC",
+	[ACP_CHANNEL_FRC] = "FRC",
+	[ACP_CHANNEL_RC] = "RC",
+	[ACP_CHANNEL_RL] = "RL",
+	[ACP_CHANNEL_RR] = "RR",
+	[ACP_CHANNEL_TC] = "TC",
+	[ACP_CHANNEL_TFL] = "TFL",
+	[ACP_CHANNEL_TFC] = "TFC",
+	[ACP_CHANNEL_TFR] = "TFR",
+	[ACP_CHANNEL_TRL] = "TRL",
+	[ACP_CHANNEL_TRC] = "TRC",
+	[ACP_CHANNEL_TRR] = "TRR",
+	[ACP_CHANNEL_RLC] = "RLC",
+	[ACP_CHANNEL_RRC] = "RRC",
+	[ACP_CHANNEL_FLW] = "FLW",
+	[ACP_CHANNEL_FRW] = "FRW",
+	[ACP_CHANNEL_LFE2] = "LFE2",
+	[ACP_CHANNEL_FLH] = "FLH",
+	[ACP_CHANNEL_FCH] = "FCH",
+	[ACP_CHANNEL_FRH] = "FRH",
+	[ACP_CHANNEL_TFLC] = "TFLC",
+	[ACP_CHANNEL_TFRC] = "TFRC",
+	[ACP_CHANNEL_TSL] = "TSL",
+	[ACP_CHANNEL_TSR] = "TSR",
+	[ACP_CHANNEL_LLFE] = "LLFE",
+	[ACP_CHANNEL_RLFE] = "RLFE",
+	[ACP_CHANNEL_BC] = "BC",
+	[ACP_CHANNEL_BLC] = "BLC",
+	[ACP_CHANNEL_BRC] = "BRC",
+};
+
+#define ACP_N_ELEMENTS(arr)	(sizeof(arr) / sizeof((arr)[0]))
+
+static inline uint32_t channel_pa2acp(pa_channel_position_t channel)
+{
+	if (channel < 0 || (size_t)channel >= ACP_N_ELEMENTS(channel_table))
+		return ACP_CHANNEL_UNKNOWN;
+	return channel_table[channel];
+}
+
+char *acp_channel_str(char *buf, size_t len, enum acp_channel ch)
+{
+	if (ch >= ACP_CHANNEL_START_Aux && ch <= ACP_CHANNEL_LAST_Aux) {
+		snprintf(buf, len, "AUX%d", ch - ACP_CHANNEL_START_Aux);
+	} else if (ch >= ACP_CHANNEL_UNKNOWN && ch <= ACP_CHANNEL_BRC) {
+		snprintf(buf, len, "%s", channel_names[ch]);
+	} else {
+		snprintf(buf, len, "UNK");
+	}
+	return buf;
+}
+
+
+const char *acp_available_str(enum acp_available status)
+{
+	switch (status) {
+	case ACP_AVAILABLE_UNKNOWN:
+		return "unknown";
+	case ACP_AVAILABLE_NO:
+		return "no";
+	case ACP_AVAILABLE_YES:
+		return "yes";
+	}
+	return "error";
+}
+
+const char *acp_direction_str(enum acp_direction direction)
+{
+	switch (direction) {
+	case ACP_DIRECTION_CAPTURE:
+		return "capture";
+	case ACP_DIRECTION_PLAYBACK:
+		return "playback";
+	}
+	return "error";
+}
+
+static void port_free(void *data)
+{
+	pa_device_port *dp = data;
+	pa_dynarray_clear(&dp->devices);
+	pa_dynarray_clear(&dp->prof);
+	pa_device_port_free(dp);
+}
+
+static void device_free(void *data)
+{
+	pa_alsa_device *dev = data;
+	pa_dynarray_clear(&dev->port_array);
+	pa_proplist_free(dev->proplist);
+	pa_hashmap_free(dev->ports);
+}
+
+static inline void channelmap_to_acp(pa_channel_map *m, uint32_t *map)
+{
+	uint32_t i, j;
+	for (i = 0; i < m->channels; i++) {
+		map[i] = channel_pa2acp(m->map[i]);
+		for (j = 0; j < i; j++) {
+			if (map[i] == map[j])
+				map[i] += 32;
+		}
+
+	}
+}
+
+static void init_device(pa_card *impl, pa_alsa_device *dev, pa_alsa_direction_t direction,
+		pa_alsa_mapping *m, uint32_t index)
+{
+	char **d;
+
+	dev->card = impl;
+	dev->mapping = m;
+	dev->device.index = index;
+	dev->device.name = m->name;
+	dev->device.description = m->description;
+	dev->device.priority = m->priority;
+	dev->device.device_strings = (const char **)m->device_strings;
+	dev->device.format.format_mask = m->sample_spec.format;
+	dev->device.format.rate_mask = m->sample_spec.rate;
+	dev->device.format.channels = m->channel_map.channels;
+	pa_cvolume_reset(&dev->real_volume, dev->device.format.channels);
+	pa_cvolume_reset(&dev->soft_volume, dev->device.format.channels);
+	channelmap_to_acp(&m->channel_map, dev->device.format.map);
+	dev->direction = direction;
+	dev->proplist = pa_proplist_new();
+	pa_proplist_update(dev->proplist, PA_UPDATE_REPLACE, m->proplist);
+	if (direction == PA_ALSA_DIRECTION_OUTPUT) {
+		dev->mixer_path_set = m->output_path_set;
+		dev->pcm_handle = m->output_pcm;
+		dev->device.direction = ACP_DIRECTION_PLAYBACK;
+		pa_proplist_update(dev->proplist, PA_UPDATE_REPLACE, m->output_proplist);
+	} else {
+		dev->mixer_path_set = m->input_path_set;
+		dev->pcm_handle = m->input_pcm;
+		dev->device.direction = ACP_DIRECTION_CAPTURE;
+		pa_proplist_update(dev->proplist, PA_UPDATE_REPLACE, m->input_proplist);
+	}
+	pa_proplist_sets(dev->proplist, PA_PROP_DEVICE_PROFILE_NAME, m->name);
+	pa_proplist_sets(dev->proplist, PA_PROP_DEVICE_PROFILE_DESCRIPTION, m->description);
+	pa_proplist_setf(dev->proplist, "card.profile.device", "%u", index);
+	pa_proplist_as_dict(dev->proplist, &dev->device.props);
+
+	dev->ports = pa_hashmap_new(pa_idxset_string_hash_func,
+			pa_idxset_string_compare_func);
+	if (m->ucm_context.ucm) {
+		dev->ucm_context = &m->ucm_context;
+		if (impl->ucm.alib_prefix != NULL) {
+			for (d = m->device_strings; *d; d++) {
+				if (pa_startswith(*d, impl->ucm.alib_prefix)) {
+					size_t plen = strlen(impl->ucm.alib_prefix);
+					size_t len = strlen(*d);
+					memmove(*d, (*d) + plen, len - plen + 1);
+					dev->device.flags |= ACP_DEVICE_UCM_DEVICE;
+				}
+			}
+		}
+	}
+	for (d = m->device_strings; *d; d++) {
+		if (pa_startswith(*d, "iec958") ||
+		    pa_startswith(*d, "hdmi"))
+			dev->device.flags |= ACP_DEVICE_IEC958;
+	}
+	pa_dynarray_init(&dev->port_array, NULL);
+}
+
+static int compare_profile(const void *a, const void *b)
+{
+	const pa_hashmap_item *i1 = a;
+	const pa_hashmap_item *i2 = b;
+	const pa_alsa_profile *p1, *p2;
+	if (i1->key == NULL || i2->key == NULL)
+		return 0;
+	p1 = i1->value;
+	p2 = i2->value;
+	if (p1->profile.priority == 0 || p2->profile.priority == 0)
+		return 0;
+	return p2->profile.priority - p1->profile.priority;
+}
+
+static void profile_free(void *data)
+{
+	pa_alsa_profile *ap = data;
+	pa_dynarray_clear(&ap->out.devices);
+	if (ap->profile.flags & ACP_PROFILE_OFF) {
+		free(ap->name);
+		free(ap->description);
+		free(ap);
+	}
+}
+
+static int add_pro_profile(pa_card *impl, uint32_t index)
+{
+	snd_ctl_t *ctl_hndl;
+	int err, dev, count = 0;
+	pa_alsa_profile *ap;
+	pa_alsa_profile_set *ps = impl->profile_set;
+	pa_alsa_mapping *m;
+	char *device;
+	snd_pcm_info_t *pcminfo;
+	pa_sample_spec ss;
+	snd_pcm_uframes_t try_period_size, try_buffer_size;
+
+	ss.format = PA_SAMPLE_S32LE;
+	ss.rate = impl->rate;
+	ss.channels = 64;
+
+	ap = pa_xnew0(pa_alsa_profile, 1);
+	ap->profile_set = ps;
+	ap->profile.name = ap->name = pa_xstrdup("pro-audio");
+	ap->profile.description = ap->description = pa_xstrdup(_("Pro Audio"));
+	ap->profile.available = ACP_AVAILABLE_YES;
+	ap->profile.flags = ACP_PROFILE_PRO;
+	ap->output_mappings = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+	ap->input_mappings = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+	pa_hashmap_put(ps->profiles, ap->name, ap);
+
+	ap->output_name = pa_xstrdup("pro-output");
+	ap->input_name = pa_xstrdup("pro-input");
+	ap->priority = 1;
+
+	pa_assert_se(asprintf(&device, "hw:%d", index) >= 0);
+
+	if ((err = snd_ctl_open(&ctl_hndl, device, 0)) < 0) {
+		pa_log_error("can't open control for card %s: %s",
+				device, snd_strerror(err));
+	        free(device);
+		return err;
+	}
+	free(device);
+
+	snd_pcm_info_alloca(&pcminfo);
+
+	dev = -1;
+	while (1) {
+		char desc[128], devstr[128], *name;
+
+		if ((err = snd_ctl_pcm_next_device(ctl_hndl, &dev)) < 0) {
+			pa_log_error("error iterating devices: %s", snd_strerror(err));
+			break;
+		}
+		if (dev < 0)
+			break;
+
+		snd_pcm_info_set_device(pcminfo, dev);
+		snd_pcm_info_set_subdevice(pcminfo, 0);
+
+		snprintf(devstr, sizeof(devstr), "hw:%d,%d", index, dev);
+		if (count++ == 0)
+			snprintf(desc, sizeof(desc), "Pro");
+		else
+			snprintf(desc, sizeof(desc), "Pro %d", dev);
+
+		snd_pcm_info_set_stream(pcminfo, SND_PCM_STREAM_PLAYBACK);
+		if ((err = snd_ctl_pcm_info(ctl_hndl, pcminfo)) < 0) {
+			if (err != -ENOENT)
+				pa_log_error("error pcm info: %s", snd_strerror(err));
+		}
+		if (err >= 0) {
+			pa_assert_se(asprintf(&name, "Mapping pro-output-%d", dev) >= 0);
+			m = pa_alsa_mapping_get(ps, name);
+			m->description = pa_xstrdup(desc);
+			m->device_strings = pa_split_spaces_strv(devstr);
+
+			try_period_size = 1024;
+			try_buffer_size = 1024 * 64;
+			m->sample_spec = ss;
+
+			if ((m->output_pcm = pa_alsa_open_by_template(m->device_strings,
+							devstr, NULL, &m->sample_spec,
+							&m->channel_map, SND_PCM_STREAM_PLAYBACK,
+							&try_period_size, &try_buffer_size,
+							0, NULL, NULL, false))) {
+				pa_alsa_init_proplist_pcm(NULL, m->output_proplist, m->output_pcm);
+				pa_proplist_setf(m->output_proplist, "clock.name", "api.alsa.%u", index);
+				pa_alsa_close(&m->output_pcm);
+				m->supported = true;
+				pa_channel_map_init_auto(&m->channel_map, m->sample_spec.channels, PA_CHANNEL_MAP_AUX);
+			}
+			pa_idxset_put(ap->output_mappings, m, NULL);
+			free(name);
+		}
+
+		snd_pcm_info_set_stream(pcminfo, SND_PCM_STREAM_CAPTURE);
+		if ((err = snd_ctl_pcm_info(ctl_hndl, pcminfo)) < 0) {
+			if (err != -ENOENT)
+				pa_log_error("error pcm info: %s", snd_strerror(err));
+		}
+		if (err >= 0) {
+			pa_assert_se(asprintf(&name, "Mapping pro-input-%d", dev) >= 0);
+			m = pa_alsa_mapping_get(ps, name);
+			m->description = pa_xstrdup(desc);
+			m->device_strings = pa_split_spaces_strv(devstr);
+
+			try_period_size = 1024;
+			try_buffer_size = 1024 * 64;
+			m->sample_spec = ss;
+
+			if ((m->input_pcm = pa_alsa_open_by_template(m->device_strings,
+							devstr, NULL, &m->sample_spec,
+							&m->channel_map, SND_PCM_STREAM_CAPTURE,
+							&try_period_size, &try_buffer_size,
+							0, NULL, NULL, false))) {
+				pa_alsa_init_proplist_pcm(NULL, m->input_proplist, m->input_pcm);
+				pa_proplist_setf(m->input_proplist, "clock.name", "api.alsa.%u", index);
+				pa_alsa_close(&m->input_pcm);
+				m->supported = true;
+				pa_channel_map_init_auto(&m->channel_map, m->sample_spec.channels, PA_CHANNEL_MAP_AUX);
+			}
+			pa_idxset_put(ap->input_mappings, m, NULL);
+			free(name);
+		}
+	}
+	snd_ctl_close(ctl_hndl);
+
+	return 0;
+}
+
+
+static void add_profiles(pa_card *impl)
+{
+	pa_alsa_profile *ap;
+	void *state;
+	struct acp_card_profile *cp;
+	pa_device_port *dp;
+	pa_alsa_device *dev;
+	int n_profiles, n_ports, n_devices;
+	uint32_t idx;
+
+	n_devices = 0;
+	pa_dynarray_init(&impl->out.devices, device_free);
+
+	ap = pa_xnew0(pa_alsa_profile, 1);
+	ap->profile.name = ap->name = pa_xstrdup("off");
+	ap->profile.description = ap->description = pa_xstrdup(_("Off"));
+	ap->profile.available = ACP_AVAILABLE_YES;
+	ap->profile.flags = ACP_PROFILE_OFF;
+	pa_hashmap_put(impl->profiles, ap->name, ap);
+
+	add_pro_profile(impl, impl->card.index);
+
+	PA_HASHMAP_FOREACH(ap, impl->profile_set->profiles, state) {
+		pa_alsa_mapping *m;
+
+		cp = &ap->profile;
+		cp->name = ap->name;
+		cp->description = ap->description;
+		cp->priority = ap->priority ? ap->priority : 1;
+
+		pa_dynarray_init(&ap->out.devices, NULL);
+
+		if (ap->output_mappings) {
+			PA_IDXSET_FOREACH(m, ap->output_mappings, idx) {
+				dev = &m->output;
+				if (dev->mapping == NULL) {
+					init_device(impl, dev, PA_ALSA_DIRECTION_OUTPUT, m, n_devices++);
+					pa_dynarray_append(&impl->out.devices, dev);
+				}
+				if (impl->use_ucm) {
+					if (m->ucm_context.ucm_devices) {
+						pa_alsa_ucm_add_ports_combination(NULL, &m->ucm_context,
+							true, impl->ports, ap, NULL);
+						pa_alsa_ucm_add_ports(&dev->ports, m->proplist, &m->ucm_context,
+							true, impl, dev->pcm_handle, impl->profile_set->ignore_dB);
+					}
+				}
+				else
+					pa_alsa_path_set_add_ports(m->output_path_set, ap, impl->ports,
+							dev->ports, NULL);
+
+				pa_dynarray_append(&ap->out.devices, dev);
+			}
+		}
+
+		if (ap->input_mappings) {
+			PA_IDXSET_FOREACH(m, ap->input_mappings, idx) {
+				dev = &m->input;
+				if (dev->mapping == NULL) {
+					init_device(impl, dev, PA_ALSA_DIRECTION_INPUT, m, n_devices++);
+					pa_dynarray_append(&impl->out.devices, dev);
+				}
+
+				if (impl->use_ucm) {
+					if (m->ucm_context.ucm_devices) {
+						pa_alsa_ucm_add_ports_combination(NULL, &m->ucm_context,
+							false, impl->ports, ap, NULL);
+						pa_alsa_ucm_add_ports(&dev->ports, m->proplist, &m->ucm_context,
+							false, impl, dev->pcm_handle, impl->profile_set->ignore_dB);
+					}
+				} else
+					pa_alsa_path_set_add_ports(m->input_path_set, ap, impl->ports,
+							dev->ports, NULL);
+
+				pa_dynarray_append(&ap->out.devices, dev);
+			}
+		}
+		cp->n_devices = pa_dynarray_size(&ap->out.devices);
+		cp->devices = ap->out.devices.array.data;
+		pa_hashmap_put(impl->profiles, ap->name, cp);
+	}
+
+	pa_dynarray_init(&impl->out.ports, NULL);
+	n_ports = 0;
+	PA_HASHMAP_FOREACH(dp, impl->ports, state) {
+		void *state2;
+		dp->card = impl;
+		dp->port.index = n_ports++;
+		dp->port.priority = dp->priority;
+		pa_dynarray_init(&dp->prof, NULL);
+		pa_dynarray_init(&dp->devices, NULL);
+		n_profiles = 0;
+		PA_HASHMAP_FOREACH(cp, dp->profiles, state2) {
+			pa_dynarray_append(&dp->prof, cp);
+			n_profiles++;
+		}
+		dp->port.n_profiles = n_profiles;
+		dp->port.profiles = dp->prof.array.data;
+
+		pa_proplist_setf(dp->proplist, "card.profile.port", "%u", dp->port.index);
+		pa_proplist_as_dict(dp->proplist, &dp->port.props);
+		pa_dynarray_append(&impl->out.ports, dp);
+	}
+	PA_DYNARRAY_FOREACH(dev, &impl->out.devices, idx) {
+		PA_HASHMAP_FOREACH(dp, dev->ports, state) {
+			pa_dynarray_append(&dev->port_array, dp);
+			pa_dynarray_append(&dp->devices, dev);
+		}
+		dev->device.ports = dev->port_array.array.data;
+		dev->device.n_ports = pa_dynarray_size(&dev->port_array);
+	}
+	PA_HASHMAP_FOREACH(dp, impl->ports, state) {
+		dp->port.devices = dp->devices.array.data;
+		dp->port.n_devices = pa_dynarray_size(&dp->devices);
+	}
+
+	pa_hashmap_sort(impl->profiles, compare_profile);
+
+	n_profiles = 0;
+	pa_dynarray_init(&impl->out.profiles, NULL);
+	PA_HASHMAP_FOREACH(cp, impl->profiles, state) {
+		cp->index = n_profiles++;
+		pa_dynarray_append(&impl->out.profiles, cp);
+	}
+}
+
+static pa_available_t calc_port_state(pa_device_port *p, pa_card *impl)
+{
+	void *state;
+	pa_alsa_jack *jack;
+	pa_available_t pa = PA_AVAILABLE_UNKNOWN;
+	pa_device_port *port;
+
+	PA_HASHMAP_FOREACH(jack, impl->jacks, state) {
+		pa_available_t cpa;
+
+		if (impl->use_ucm)
+			port = pa_hashmap_get(impl->ports, jack->name);
+		else {
+			if (jack->path)
+				port = jack->path->port;
+			else
+				continue;
+		}
+
+		if (p != port)
+			continue;
+
+		cpa = jack->plugged_in ? jack->state_plugged : jack->state_unplugged;
+
+		if (cpa == PA_AVAILABLE_NO) {
+			/* If a plugged-in jack causes the availability to go to NO, it
+			* should override all other availability information (like a
+			* blacklist) so set and bail */
+			if (jack->plugged_in) {
+				pa = cpa;
+				break;
+			}
+
+			/* If the current availability is unknown go the more precise no,
+			* but otherwise don't change state */
+			if (pa == PA_AVAILABLE_UNKNOWN)
+				pa = cpa;
+		} else if (cpa == PA_AVAILABLE_YES) {
+			/* Output is available through at least one jack, so go to that
+			* level of availability. We still need to continue iterating through
+			* the jacks in case a jack is plugged in that forces the state to no
+			*/
+			pa = cpa;
+		}
+	}
+	return pa;
+}
+
+static void profile_set_available(pa_card *impl, uint32_t index,
+		enum acp_available status, bool emit)
+{
+	struct acp_card_profile *p = impl->card.profiles[index];
+	enum acp_available old = p->available;
+
+	if (old != status)
+		pa_log_info("Profile %s available %s -> %s", p->name,
+				acp_available_str(old), acp_available_str(status));
+
+	p->available = status;
+
+	if (emit && impl->events && impl->events->profile_available)
+		impl->events->profile_available(impl->user_data, index,
+				old, status);
+}
+
+struct temp_port_avail {
+	pa_device_port *port;
+	pa_available_t avail;
+};
+
+static int report_jack_state(snd_mixer_elem_t *melem, unsigned int mask)
+{
+	pa_card *impl = snd_mixer_elem_get_callback_private(melem);
+	snd_hctl_elem_t *elem = snd_mixer_elem_get_private(melem);
+	snd_ctl_elem_value_t *elem_value;
+	bool plugged_in, any_input_port_available;
+	void *state;
+	pa_alsa_jack *jack;
+	struct temp_port_avail *tp, *tports;
+	pa_alsa_profile *profile;
+	enum acp_available active_available = ACP_AVAILABLE_UNKNOWN;
+	size_t size;
+
+#if 0
+	/* Changing the jack state may cause a port change, and a port change will
+	 * make the sink or source change the mixer settings. If there are multiple
+	 * users having pulseaudio running, the mixer changes done by inactive
+	 * users may mess up the volume settings for the active users, because when
+	 * the inactive users change the mixer settings, those changes are picked
+	 * up by the active user's pulseaudio instance and the changes are
+	 * interpreted as if the active user changed the settings manually e.g.
+	 * with alsamixer. Even single-user systems suffer from this, because gdm
+	 * runs its own pulseaudio instance.
+	 *
+	 * We rerun this function when being unsuspended to catch up on jack state
+	 * changes */
+	if (u->card->suspend_cause & PA_SUSPEND_SESSION)
+		return 0;
+#endif
+
+	if (mask == SND_CTL_EVENT_MASK_REMOVE)
+		return 0;
+
+	snd_ctl_elem_value_alloca(&elem_value);
+	if (snd_hctl_elem_read(elem, elem_value) < 0) {
+		pa_log_warn("Failed to read jack detection from '%s'", pa_strnull(snd_hctl_elem_get_name(elem)));
+		return 0;
+	}
+
+	plugged_in = !!snd_ctl_elem_value_get_boolean(elem_value, 0);
+
+	pa_log_debug("Jack '%s' is now %s", pa_strnull(snd_hctl_elem_get_name(elem)),
+			plugged_in ? "plugged in" : "unplugged");
+
+	size = sizeof(struct temp_port_avail) * (pa_hashmap_size(impl->jacks)+1);
+	tports = tp = alloca(size);
+	memset(tports, 0, size);
+
+	PA_HASHMAP_FOREACH(jack, impl->jacks, state)
+		if (jack->melem == melem) {
+			pa_alsa_jack_set_plugged_in(jack, plugged_in);
+
+			if (impl->use_ucm) {
+				/* When using UCM, pa_alsa_jack_set_plugged_in() maps the jack
+				 * state to port availability. */
+				continue;
+			}
+
+			/* When not using UCM, we have to do the jack state -> port
+			 * availability mapping ourselves. */
+			pa_assert_se(tp->port = jack->path->port);
+			tp->avail = calc_port_state(tp->port, impl);
+			tp++;
+		}
+
+	/* Report available ports before unavailable ones: in case port 1
+	 * becomes available when port 2 becomes unavailable,
+	 * this prevents an unnecessary switch port 1 -> port 3 -> port 2 */
+
+	for (tp = tports; tp->port; tp++)
+		if (tp->avail != PA_AVAILABLE_NO)
+			pa_device_port_set_available(tp->port, tp->avail);
+	for (tp = tports; tp->port; tp++)
+		if (tp->avail == PA_AVAILABLE_NO)
+			pa_device_port_set_available(tp->port, tp->avail);
+
+	for (tp = tports; tp->port; tp++) {
+		pa_alsa_port_data *data;
+
+		data = PA_DEVICE_PORT_DATA(tp->port);
+
+		if (!data->suspend_when_unavailable)
+			continue;
+
+#if 0
+		pa_sink *sink;
+		uint32_t idx;
+		PA_IDXSET_FOREACH(sink, u->core->sinks, idx) {
+			if (sink->active_port == tp->port)
+				pa_sink_suspend(sink, tp->avail == PA_AVAILABLE_NO, PA_SUSPEND_UNAVAILABLE);
+		}
+#endif
+	}
+
+	/* Update profile availabilities. Ideally we would mark all profiles
+	 * unavailable that contain unavailable devices. We can't currently do that
+	 * in all cases, because if there are multiple sinks in a profile, and the
+	 * profile contains a mix of available and unavailable ports, we don't know
+	 * how the ports are distributed between the different sinks. It's possible
+	 * that some sinks contain only unavailable ports, in which case we should
+	 * mark the profile as unavailable, but it's also possible that all sinks
+	 * contain at least one available port, in which case we should mark the
+	 * profile as available. Until the data structures are improved so that we
+	 * can distinguish between these two cases, we mark the problematic cases
+	 * as available (well, "unknown" to be precise, but there's little
+	 * practical difference).
+	 *
+	 * When all output ports are unavailable, we know that all sinks are
+	 * unavailable, and therefore the profile is marked unavailable as well.
+	 * The same applies to input ports as well, of course.
+	 *
+	 * If there are no output ports at all, but the profile contains at least
+	 * one sink, then the output is considered to be available. */
+	if (impl->card.active_profile_index != ACP_INVALID_INDEX)
+		active_available = impl->card.profiles[impl->card.active_profile_index]->available;
+
+	/* First round - detect, if we have any input port available.
+	   If the hardware can report the state for all I/O jacks, only speakers
+	   may be plugged in. */
+	any_input_port_available = false;
+	PA_HASHMAP_FOREACH(profile, impl->profiles, state) {
+		pa_device_port *port;
+		void *state2;
+
+		if (profile->profile.flags & ACP_PROFILE_OFF)
+			continue;
+
+		PA_HASHMAP_FOREACH(port, impl->ports, state2) {
+			if (!pa_hashmap_get(port->profiles, profile->profile.name))
+				continue;
+
+			if (port->port.direction == ACP_DIRECTION_CAPTURE &&
+			    port->port.available != ACP_AVAILABLE_NO) {
+				any_input_port_available = true;
+				goto input_port_found;
+			}
+		}
+	}
+input_port_found:
+
+	/* Second round */
+	PA_HASHMAP_FOREACH(profile, impl->profiles, state) {
+		pa_device_port *port;
+		void *state2;
+		bool has_input_port = false;
+		bool has_output_port = false;
+		bool found_available_input_port = false;
+		bool found_available_output_port = false;
+		enum acp_available available = ACP_AVAILABLE_UNKNOWN;
+
+		if (profile->profile.flags & ACP_PROFILE_OFF)
+			continue;
+
+		PA_HASHMAP_FOREACH(port, impl->ports, state2) {
+			if (!pa_hashmap_get(port->profiles, profile->profile.name))
+				continue;
+
+			if (port->port.direction == ACP_DIRECTION_CAPTURE) {
+				has_input_port = true;
+				if (port->port.available != ACP_AVAILABLE_NO)
+					found_available_input_port = true;
+			} else {
+				has_output_port = true;
+				if (port->port.available != ACP_AVAILABLE_NO)
+					found_available_output_port = true;
+			}
+		}
+
+		if ((has_input_port && !found_available_input_port) ||
+		    (has_output_port && !found_available_output_port))
+			available = ACP_AVAILABLE_NO;
+
+		if (has_input_port && !has_output_port && found_available_input_port)
+			available = ACP_AVAILABLE_YES;
+		if (has_output_port && (!has_input_port || !any_input_port_available) && found_available_output_port)
+			available = ACP_AVAILABLE_YES;
+		if (has_output_port && has_input_port && found_available_output_port && found_available_input_port)
+			available = ACP_AVAILABLE_YES;
+
+		/* We want to update the active profile's status last, so logic that
+		 * may change the active profile based on profile availability status
+		 * has an updated view of all profiles' availabilities. */
+		if (profile->profile.index == impl->card.active_profile_index)
+			active_available = available;
+		else
+			profile_set_available(impl, profile->profile.index, available, false);
+	}
+
+	if (impl->card.active_profile_index != ACP_INVALID_INDEX)
+		profile_set_available(impl, impl->card.active_profile_index, active_available, true);
+
+	return 0;
+}
+
+static void init_jacks(pa_card *impl)
+{
+	void *state;
+	pa_alsa_path* path;
+	pa_alsa_jack* jack;
+	char buf[64];
+
+	impl->jacks = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+
+	if (impl->use_ucm) {
+		PA_LLIST_FOREACH(jack, impl->ucm.jacks)
+			if (jack->has_control)
+				pa_hashmap_put(impl->jacks, jack, jack);
+	} else {
+		/* See if we have any jacks */
+		if (impl->profile_set->output_paths)
+			PA_HASHMAP_FOREACH(path, impl->profile_set->output_paths, state)
+				PA_LLIST_FOREACH(jack, path->jacks)
+					if (jack->has_control)
+						pa_hashmap_put(impl->jacks, jack, jack);
+
+		if (impl->profile_set->input_paths)
+			PA_HASHMAP_FOREACH(path, impl->profile_set->input_paths, state)
+				PA_LLIST_FOREACH(jack, path->jacks)
+					if (jack->has_control)
+						pa_hashmap_put(impl->jacks, jack, jack);
+	}
+
+	pa_log_debug("Found %d jacks.", pa_hashmap_size(impl->jacks));
+
+	if (pa_hashmap_size(impl->jacks) == 0)
+		return;
+
+	PA_HASHMAP_FOREACH(jack, impl->jacks, state) {
+		if (!jack->mixer_device_name) {
+			jack->mixer_handle = pa_alsa_open_mixer(impl->ucm.mixers, impl->card.index, false);
+			if (!jack->mixer_handle) {
+				pa_log("Failed to open mixer for card %d for jack detection", impl->card.index);
+				continue;
+			}
+		} else {
+			jack->mixer_handle = pa_alsa_open_mixer_by_name(impl->ucm.mixers, jack->mixer_device_name, false);
+			if (!jack->mixer_handle) {
+				pa_log("Failed to open mixer '%s' for jack detection", jack->mixer_device_name);
+				continue;
+			}
+		}
+
+		pa_alsa_mixer_use_for_poll(impl->ucm.mixers, jack->mixer_handle);
+		jack->melem = pa_alsa_mixer_find_card(jack->mixer_handle, &jack->alsa_id, 0);
+		if (!jack->melem) {
+			pa_alsa_mixer_id_to_string(buf, sizeof(buf), &jack->alsa_id);
+			pa_log_warn("Jack '%s' seems to have disappeared.", buf);
+			pa_alsa_jack_set_has_control(jack, false);
+			continue;
+		}
+		snd_mixer_elem_set_callback(jack->melem, report_jack_state);
+		snd_mixer_elem_set_callback_private(jack->melem, impl);
+		report_jack_state(jack->melem, 0);
+	}
+}
+static pa_device_port* find_port_with_eld_device(pa_card *impl, int device)
+{
+	void *state;
+	pa_device_port *p;
+
+	if (impl->use_ucm) {
+		PA_HASHMAP_FOREACH(p, impl->ports, state) {
+			pa_alsa_ucm_port_data *data = PA_DEVICE_PORT_DATA(p);
+			pa_assert(data->eld_mixer_device_name);
+			if (device == data->eld_device)
+				return p;
+		}
+	} else {
+		PA_HASHMAP_FOREACH(p, impl->ports, state) {
+			pa_alsa_port_data *data = PA_DEVICE_PORT_DATA(p);
+			pa_assert(data->path);
+			if (device == data->path->eld_device)
+				return p;
+		}
+	}
+	return NULL;
+}
+
+static int hdmi_eld_changed(snd_mixer_elem_t *melem, unsigned int mask)
+{
+	pa_card *impl = snd_mixer_elem_get_callback_private(melem);
+	snd_hctl_elem_t *elem = snd_mixer_elem_get_private(melem);
+	int device = snd_hctl_elem_get_device(elem);
+	const char *old_monitor_name;
+	pa_device_port *p;
+	pa_hdmi_eld eld;
+	bool changed = false;
+
+	if (mask == SND_CTL_EVENT_MASK_REMOVE)
+		return 0;
+
+	p = find_port_with_eld_device(impl, device);
+	if (p == NULL) {
+		pa_log_error("Invalid device changed in ALSA: %d", device);
+		return 0;
+	}
+
+	if (pa_alsa_get_hdmi_eld(elem, &eld) < 0)
+		memset(&eld, 0, sizeof(eld));
+
+	old_monitor_name = pa_proplist_gets(p->proplist, PA_PROP_DEVICE_PRODUCT_NAME);
+	if (eld.monitor_name[0] == '\0') {
+		changed |= old_monitor_name != NULL;
+		pa_proplist_unset(p->proplist, PA_PROP_DEVICE_PRODUCT_NAME);
+	} else {
+		changed |= (old_monitor_name == NULL) || (!spa_streq(old_monitor_name, eld.monitor_name));
+		pa_proplist_sets(p->proplist, PA_PROP_DEVICE_PRODUCT_NAME, eld.monitor_name);
+	}
+	pa_proplist_as_dict(p->proplist, &p->port.props);
+
+	if (changed && mask != 0 && impl->events && impl->events->props_changed)
+		impl->events->props_changed(impl->user_data);
+	return 0;
+}
+
+static void init_eld_ctls(pa_card *impl)
+{
+	void *state;
+	pa_device_port *port;
+
+	/* The code in this function expects ports to have a pa_alsa_port_data
+	* struct as their data, but in UCM mode ports don't have any data. Hence,
+	* the ELD controls can't currently be used in UCM mode. */
+	PA_HASHMAP_FOREACH(port, impl->ports, state) {
+		snd_mixer_t *mixer_handle;
+		snd_mixer_elem_t* melem;
+		int device;
+
+		if (impl->use_ucm) {
+			pa_alsa_ucm_port_data *data = PA_DEVICE_PORT_DATA(port);
+			device = data->eld_device;
+			if (device < 0 || !data->eld_mixer_device_name)
+				continue;
+
+			mixer_handle = pa_alsa_open_mixer_by_name(impl->ucm.mixers, data->eld_mixer_device_name, true);
+		} else {
+			pa_alsa_port_data *data = PA_DEVICE_PORT_DATA(port);
+
+			pa_assert(data->path);
+
+			device = data->path->eld_device;
+			if (device < 0)
+				continue;
+
+			mixer_handle = pa_alsa_open_mixer(impl->ucm.mixers, impl->card.index, true);
+		}
+
+		if (!mixer_handle)
+			continue;
+
+		melem = pa_alsa_mixer_find_pcm(mixer_handle, "ELD", device);
+		if (melem) {
+			pa_alsa_mixer_use_for_poll(impl->ucm.mixers, mixer_handle);
+			snd_mixer_elem_set_callback(melem, hdmi_eld_changed);
+			snd_mixer_elem_set_callback_private(melem, impl);
+			hdmi_eld_changed(melem, 0);
+			pa_log_info("ELD device found for port %s (%d).", port->port.name, device);
+		}
+		else
+			pa_log_debug("No ELD device found for port %s (%d).", port->port.name, device);
+	}
+}
+
+uint32_t acp_card_find_best_profile_index(struct acp_card *card, const char *name)
+{
+	uint32_t i;
+	uint32_t best, best2, off;
+	struct acp_card_profile **profiles = card->profiles;
+
+	best = best2 = ACP_INVALID_INDEX;
+	off = 0;
+
+	for (i = 0; i < card->n_profiles; i++) {
+		struct acp_card_profile *p = profiles[i];
+
+		if (name) {
+			if (spa_streq(name, p->name))
+				best = i;
+		} else if (p->flags & ACP_PROFILE_OFF) {
+			off = i;
+		} else if (p->available == ACP_AVAILABLE_YES) {
+			if (best == ACP_INVALID_INDEX || p->priority > profiles[best]->priority)
+				best = i;
+		} else if (p->available != ACP_AVAILABLE_NO) {
+			if (best2 == ACP_INVALID_INDEX || p->priority > profiles[best2]->priority)
+				best2 = i;
+		}
+	}
+	if (best == ACP_INVALID_INDEX)
+		best = best2;
+	if (best == ACP_INVALID_INDEX)
+		best = off;
+	return best;
+}
+
+static void find_mixer(pa_card *impl, pa_alsa_device *dev, const char *element, bool ignore_dB)
+{
+	const char *mdev;
+	pa_alsa_mapping *mapping = dev->mapping;
+
+	if (!mapping && !element)
+		return;
+
+	if (!element && mapping && pa_alsa_path_set_is_empty(dev->mixer_path_set))
+		return;
+
+	mdev = pa_proplist_gets(mapping->proplist, "alsa.mixer_device");
+	if (mdev) {
+		dev->mixer_handle = pa_alsa_open_mixer_by_name(impl->ucm.mixers, mdev, true);
+	} else {
+		dev->mixer_handle = pa_alsa_open_mixer(impl->ucm.mixers, impl->card.index, true);
+	}
+	if (!dev->mixer_handle) {
+		pa_log_info("Failed to find a working mixer device.");
+		return;
+	}
+
+	if (element) {
+		if (!(dev->mixer_path = pa_alsa_path_synthesize(element, dev->direction)))
+			goto fail;
+
+		if (pa_alsa_path_probe(dev->mixer_path, NULL, dev->mixer_handle, ignore_dB) < 0)
+			goto fail;
+
+		pa_log_debug("Probed mixer path %s:", dev->mixer_path->name);
+		pa_alsa_path_dump(dev->mixer_path);
+	}
+	return;
+
+fail:
+	if (dev->mixer_path) {
+		pa_alsa_path_free(dev->mixer_path);
+		dev->mixer_path = NULL;
+	}
+	dev->mixer_handle = NULL;
+}
+
+static int mixer_callback(snd_mixer_elem_t *elem, unsigned int mask)
+{
+	pa_alsa_device *dev = snd_mixer_elem_get_callback_private(elem);
+
+	if (mask == SND_CTL_EVENT_MASK_REMOVE)
+		return 0;
+
+	pa_log_info("%p mixer changed %d", dev, mask);
+
+	if (mask & SND_CTL_EVENT_MASK_VALUE) {
+		if (dev->read_volume)
+			dev->read_volume(dev);
+		if (dev->read_mute)
+			dev->read_mute(dev);
+	}
+	return 0;
+}
+
+static int read_volume(pa_alsa_device *dev)
+{
+	pa_card *impl = dev->card;
+	pa_cvolume r;
+	uint32_t i;
+	int res;
+
+	if (!dev->mixer_handle)
+		return 0;
+
+	if ((res = pa_alsa_path_get_volume(dev->mixer_path, dev->mixer_handle, &dev->mapping->channel_map, &r)) < 0)
+		return res;
+
+	/* Shift down by the base volume, so that 0dB becomes maximum volume */
+	pa_sw_cvolume_multiply_scalar(&r, &r, dev->base_volume);
+
+	if (pa_cvolume_equal(&dev->hardware_volume, &r))
+		return 0;
+
+	dev->real_volume = dev->hardware_volume = r;
+
+	pa_log_info("New hardware volume: min:%d max:%d",
+			pa_cvolume_min(&r), pa_cvolume_max(&r));
+
+	for (i = 0; i < r.channels; i++)
+		pa_log_debug("  %d: %d", i, r.values[i]);
+
+	pa_cvolume_reset(&dev->soft_volume, r.channels);
+
+	if (impl->events && impl->events->volume_changed)
+		impl->events->volume_changed(impl->user_data, &dev->device);
+
+	return 0;
+}
+
+static void set_volume(pa_alsa_device *dev, const pa_cvolume *v)
+{
+	pa_cvolume r;
+
+	dev->real_volume = *v;
+
+	if (!dev->mixer_handle)
+		return;
+
+	/* Shift up by the base volume */
+	pa_sw_cvolume_divide_scalar(&r, &dev->real_volume, dev->base_volume);
+
+	if (pa_alsa_path_set_volume(dev->mixer_path, dev->mixer_handle, &dev->mapping->channel_map,
+			&r, false, true) < 0)
+		return;
+
+	/* Shift down by the base volume, so that 0dB becomes maximum volume */
+	pa_sw_cvolume_multiply_scalar(&r, &r, dev->base_volume);
+
+	dev->hardware_volume = r;
+
+	if (dev->mixer_path->has_dB) {
+		pa_cvolume new_soft_volume;
+		bool accurate_enough;
+
+		/* Match exactly what the user requested by software */
+		pa_sw_cvolume_divide(&new_soft_volume, &dev->real_volume, &dev->hardware_volume);
+
+		/* If the adjustment to do in software is only minimal we
+		 * can skip it. That saves us CPU at the expense of a bit of
+		 * accuracy */
+		accurate_enough =
+			(pa_cvolume_min(&new_soft_volume) >= (PA_VOLUME_NORM - VOLUME_ACCURACY)) &&
+			(pa_cvolume_max(&new_soft_volume) <= (PA_VOLUME_NORM + VOLUME_ACCURACY));
+
+		pa_log_debug("Requested volume: %d", pa_cvolume_max(&dev->real_volume));
+		pa_log_debug("Got hardware volume: %d", pa_cvolume_max(&dev->hardware_volume));
+		pa_log_debug("Calculated software volume: %d (accurate-enough=%s)",
+				pa_cvolume_max(&new_soft_volume),
+				pa_yes_no(accurate_enough));
+
+		if (accurate_enough)
+			pa_cvolume_reset(&new_soft_volume, new_soft_volume.channels);
+
+		dev->soft_volume = new_soft_volume;
+	} else {
+		pa_log_debug("Wrote hardware volume: %d", pa_cvolume_max(&r));
+		/* We can't match exactly what the user requested, hence let's
+		 * at least tell the user about it */
+		dev->real_volume = r;
+	}
+}
+
+static int read_mute(pa_alsa_device *dev)
+{
+	pa_card *impl = dev->card;
+	bool mute;
+	int res;
+
+	if (!dev->mixer_handle)
+		return 0;
+
+	if ((res = pa_alsa_path_get_mute(dev->mixer_path, dev->mixer_handle, &mute)) < 0)
+		return res;
+
+	if (mute == dev->muted)
+		return 0;
+
+	dev->muted = mute;
+	pa_log_info("New hardware muted: %d", mute);
+
+	if (impl->events && impl->events->mute_changed)
+		impl->events->mute_changed(impl->user_data, &dev->device);
+
+	return 0;
+}
+
+static void set_mute(pa_alsa_device *dev, bool mute)
+{
+	dev->muted = mute;
+
+	if (!dev->mixer_handle)
+		return;
+
+	pa_alsa_path_set_mute(dev->mixer_path, dev->mixer_handle, mute);
+}
+
+static void mixer_volume_init(pa_card *impl, pa_alsa_device *dev)
+{
+	pa_assert(dev);
+
+	if (impl->soft_mixer || !dev->mixer_path || !dev->mixer_path->has_volume) {
+		dev->read_volume = NULL;
+		dev->set_volume = NULL;
+		pa_log_info("Driver does not support hardware volume control, "
+				"falling back to software volume control.");
+		dev->base_volume = PA_VOLUME_NORM;
+		dev->n_volume_steps = PA_VOLUME_NORM+1;
+		dev->device.flags &= ~ACP_DEVICE_HW_VOLUME;
+	} else {
+		dev->read_volume = read_volume;
+		dev->set_volume = set_volume;
+		dev->device.flags |= ACP_DEVICE_HW_VOLUME;
+
+#if 0
+		if (u->mixer_path->has_dB && u->deferred_volume) {
+			pa_sink_set_write_volume_callback(u->sink, sink_write_volume_cb);
+			pa_log_info("Successfully enabled deferred volume.");
+		} else
+			pa_sink_set_write_volume_callback(u->sink, NULL);
+#endif
+
+		if (dev->mixer_path->has_dB) {
+			dev->decibel_volume = true;
+			pa_log_info("Hardware volume ranges from %0.2f dB to %0.2f dB.",
+					dev->mixer_path->min_dB, dev->mixer_path->max_dB);
+
+			dev->base_volume = pa_sw_volume_from_dB(-dev->mixer_path->max_dB);
+			dev->n_volume_steps = PA_VOLUME_NORM+1;
+
+			pa_log_info("Fixing base volume to %0.2f dB", pa_sw_volume_to_dB(dev->base_volume));
+		} else {
+			dev->decibel_volume = false;
+			pa_log_info("Hardware volume ranges from %li to %li.",
+					dev->mixer_path->min_volume, dev->mixer_path->max_volume);
+			dev->base_volume = PA_VOLUME_NORM;
+			dev->n_volume_steps = dev->mixer_path->max_volume - dev->mixer_path->min_volume + 1;
+		}
+		pa_log_info("Using hardware volume control. Hardware dB scale %s.",
+				dev->mixer_path->has_dB ? "supported" : "not supported");
+	}
+	dev->device.base_volume = pa_sw_volume_to_linear(dev->base_volume);
+	dev->device.volume_step = 1.0f / dev->n_volume_steps;
+
+	if (impl->soft_mixer || !dev->mixer_path || !dev->mixer_path->has_mute) {
+		dev->read_mute = NULL;
+		dev->set_mute = NULL;
+		pa_log_info("Driver does not support hardware mute control, falling back to software mute control.");
+		dev->device.flags &= ~ACP_DEVICE_HW_MUTE;
+	} else {
+		dev->read_mute = read_mute;
+		dev->set_mute = set_mute;
+		pa_log_info("Using hardware mute control.");
+		dev->device.flags |= ACP_DEVICE_HW_MUTE;
+	}
+}
+
+
+static int setup_mixer(pa_card *impl, pa_alsa_device *dev, bool ignore_dB)
+{
+	int res;
+	bool need_mixer_callback = false;
+
+	/* This code is before the u->mixer_handle check, because if the UCM
+	* configuration doesn't specify volume or mute controls, u->mixer_handle
+	* will be NULL, but the UCM device enable sequence will still need to be
+	* executed. */
+	if (dev->active_port && dev->ucm_context) {
+		if ((res = pa_alsa_ucm_set_port(dev->ucm_context, dev->active_port,
+					dev->direction == PA_ALSA_DIRECTION_OUTPUT)) < 0)
+			return res;
+	}
+
+	if (!dev->mixer_handle)
+		return 0;
+
+	if (dev->active_port) {
+		if (!impl->use_ucm) {
+			pa_alsa_port_data *data;
+
+			/* We have a list of supported paths, so let's activate the
+			 * one that has been chosen as active */
+			data = PA_DEVICE_PORT_DATA(dev->active_port);
+			dev->mixer_path = data->path;
+
+			pa_alsa_path_select(data->path, data->setting, dev->mixer_handle, dev->muted);
+		} else {
+			pa_alsa_ucm_port_data *data;
+
+			data = PA_DEVICE_PORT_DATA(dev->active_port);
+
+			/* Now activate volume controls, if any */
+			if (data->path) {
+				dev->mixer_path = data->path;
+				pa_alsa_path_select(dev->mixer_path, NULL, dev->mixer_handle, dev->muted);
+			}
+		}
+	} else {
+		if (!dev->mixer_path && dev->mixer_path_set)
+			dev->mixer_path = pa_hashmap_first(dev->mixer_path_set->paths);
+
+		if (dev->mixer_path) {
+			/* Hmm, we have only a single path, then let's activate it */
+			pa_alsa_path_select(dev->mixer_path, dev->mixer_path->settings,
+					dev->mixer_handle, dev->muted);
+		} else
+			return 0;
+	}
+
+	mixer_volume_init(impl, dev);
+
+	/* Will we need to register callbacks? */
+	if (dev->mixer_path_set && dev->mixer_path_set->paths) {
+		pa_alsa_path *p;
+		void *state;
+
+		PA_HASHMAP_FOREACH(p, dev->mixer_path_set->paths, state) {
+			if (p->has_volume || p->has_mute)
+				need_mixer_callback = true;
+		}
+	}
+	else if (dev->mixer_path)
+		need_mixer_callback = dev->mixer_path->has_volume || dev->mixer_path->has_mute;
+
+	if (!impl->soft_mixer && need_mixer_callback) {
+		pa_alsa_mixer_use_for_poll(impl->ucm.mixers, dev->mixer_handle);
+		if (dev->mixer_path_set)
+			pa_alsa_path_set_set_callback(dev->mixer_path_set, dev->mixer_handle, mixer_callback, dev);
+		else
+			pa_alsa_path_set_callback(dev->mixer_path, dev->mixer_handle, mixer_callback, dev);
+	}
+	return 0;
+}
+
+static int device_disable(pa_card *impl, pa_alsa_mapping *mapping, pa_alsa_device *dev)
+{
+	dev->device.flags &= ~ACP_DEVICE_ACTIVE;
+	if (dev->active_port) {
+		dev->active_port->port.flags &= ~ACP_PORT_ACTIVE;
+		dev->active_port = NULL;
+	}
+	return 0;
+}
+
+static int device_enable(pa_card *impl, pa_alsa_mapping *mapping, pa_alsa_device *dev)
+{
+	const char *mod_name;
+	uint32_t i, port_index;
+	int res;
+
+	if (impl->use_ucm &&
+	    (mod_name = pa_proplist_gets(mapping->proplist, PA_ALSA_PROP_UCM_MODIFIER))) {
+		if (snd_use_case_set(impl->ucm.ucm_mgr, "_enamod", mod_name) < 0)
+			pa_log("Failed to enable ucm modifier %s", mod_name);
+		else
+			pa_log_debug("Enabled ucm modifier %s", mod_name);
+	}
+
+	pa_log_info("Device: %s mapping '%s' (%s).", dev->device.description,
+			mapping->description, mapping->name);
+
+	dev->device.flags |= ACP_DEVICE_ACTIVE;
+
+	find_mixer(impl, dev, NULL, impl->ignore_dB);
+
+	/* Synchronize priority values, as it may have changed when setting the profile */
+	for (i = 0; i < impl->card.n_ports; i++) {
+		pa_device_port *p = (pa_device_port *)impl->card.ports[i];
+		p->port.priority = p->priority;
+	}
+
+	if (impl->auto_port)
+		port_index = acp_device_find_best_port_index(&dev->device, NULL);
+	else
+		port_index = ACP_INVALID_INDEX;
+
+	if (port_index == ACP_INVALID_INDEX)
+		dev->active_port = NULL;
+	else
+		dev->active_port = (pa_device_port*)impl->card.ports[port_index];
+
+	if (dev->active_port)
+		dev->active_port->port.flags |= ACP_PORT_ACTIVE;
+
+	if ((res = setup_mixer(impl, dev, impl->ignore_dB)) < 0)
+		return res;
+
+	if (dev->read_volume)
+		dev->read_volume(dev);
+	else {
+		pa_cvolume_reset(&dev->real_volume, dev->device.format.channels);
+		pa_cvolume_reset(&dev->soft_volume, dev->device.format.channels);
+	}
+	if (dev->read_mute)
+		dev->read_mute(dev);
+	else
+		dev->muted = false;
+
+	return 0;
+}
+
+int acp_card_set_profile(struct acp_card *card, uint32_t new_index, uint32_t flags)
+{
+	pa_card *impl = (pa_card *)card;
+	pa_alsa_mapping *am;
+	uint32_t old_index = impl->card.active_profile_index;
+	struct acp_card_profile **profiles = card->profiles;
+	pa_alsa_profile *op, *np;
+	uint32_t idx;
+	int res;
+
+	if (new_index >= card->n_profiles)
+		return -EINVAL;
+
+	op = old_index != ACP_INVALID_INDEX ? (pa_alsa_profile*)profiles[old_index] : NULL;
+	np = (pa_alsa_profile*)profiles[new_index];
+
+	if (op == np)
+		return 0;
+
+	pa_log_info("activate profile: %s (%d)", np->profile.name, new_index);
+
+	if (op && op->output_mappings) {
+		PA_IDXSET_FOREACH(am, op->output_mappings, idx) {
+			if (np->output_mappings &&
+			    pa_idxset_get_by_data(np->output_mappings, am, NULL))
+				continue;
+
+			device_disable(impl, am, &am->output);
+		}
+	}
+	if (op && op->input_mappings) {
+		PA_IDXSET_FOREACH(am, op->input_mappings, idx) {
+			if (np->input_mappings &&
+			    pa_idxset_get_by_data(np->input_mappings, am, NULL))
+				continue;
+
+			device_disable(impl, am, &am->input);
+		}
+	}
+
+	/* if UCM is available for this card then update the verb */
+	if (impl->use_ucm && !(np->profile.flags & ACP_PROFILE_PRO)) {
+		if ((res = pa_alsa_ucm_set_profile(&impl->ucm, impl,
+		    np->profile.flags & ACP_PROFILE_OFF ? NULL : np->profile.name,
+		    op ? op->profile.name : NULL)) < 0) {
+			return res;
+		}
+	}
+
+	if (np->output_mappings) {
+		PA_IDXSET_FOREACH(am, np->output_mappings, idx) {
+			if (impl->use_ucm) {
+				/* Update ports priorities */
+				if (am->ucm_context.ucm_devices) {
+					pa_alsa_ucm_add_ports_combination(am->output.ports, &am->ucm_context,
+						true, impl->ports, np, NULL);
+				}
+			}
+			device_enable(impl, am, &am->output);
+		}
+	}
+
+	if (np->input_mappings) {
+		PA_IDXSET_FOREACH(am, np->input_mappings, idx) {
+			if (impl->use_ucm) {
+				/* Update ports priorities */
+				if (am->ucm_context.ucm_devices) {
+					pa_alsa_ucm_add_ports_combination(am->input.ports, &am->ucm_context,
+						false, impl->ports, np, NULL);
+				}
+			}
+			device_enable(impl, am, &am->input);
+		}
+	}
+	if (op)
+		op->profile.flags &= ~(ACP_PROFILE_ACTIVE | ACP_PROFILE_SAVE);
+	np->profile.flags |= ACP_PROFILE_ACTIVE | flags;
+	impl->card.active_profile_index = new_index;
+
+	if (impl->events && impl->events->profile_changed)
+		impl->events->profile_changed(impl->user_data, old_index,
+				new_index);
+	return 0;
+}
+
+static void prune_singleton_availability_groups(pa_hashmap *ports) {
+    pa_device_port *p;
+    pa_hashmap *group_counts;
+    void *state, *count;
+    const char *group;
+
+    /* Collect groups and erase those that don't have more than 1 path */
+    group_counts = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
+
+    PA_HASHMAP_FOREACH(p, ports, state) {
+        if (p->availability_group) {
+            count = pa_hashmap_get(group_counts, p->availability_group);
+            pa_hashmap_remove(group_counts, p->availability_group);
+            pa_hashmap_put(group_counts, p->availability_group, PA_UINT_TO_PTR(PA_PTR_TO_UINT(count) + 1));
+        }
+    }
+
+    /* Now we have an availability_group -> count map, let's drop all groups
+     * that have only one member */
+    PA_HASHMAP_FOREACH_KV(group, count, group_counts, state) {
+        if (count == PA_UINT_TO_PTR(1))
+            pa_hashmap_remove(group_counts, group);
+    }
+
+    PA_HASHMAP_FOREACH(p, ports, state) {
+        if (p->availability_group && !pa_hashmap_get(group_counts, p->availability_group)) {
+            pa_log_debug("Pruned singleton availability group %s from port %s", p->availability_group, p->name);
+            pa_xfree(p->availability_group);
+            p->availability_group = NULL;
+        }
+    }
+
+    pa_hashmap_free(group_counts);
+}
+
+static const char *acp_dict_lookup(const struct acp_dict *dict, const char *key)
+{
+	const struct acp_dict_item *it;
+	acp_dict_for_each(it, dict) {
+		if (spa_streq(key, it->key))
+			return it->value;
+	}
+	return NULL;
+}
+
+struct acp_card *acp_card_new(uint32_t index, const struct acp_dict *props)
+{
+	pa_card *impl;
+	struct acp_card *card;
+	const char *s, *profile_set = NULL, *profile = NULL;
+	char device_id[16];
+	uint32_t profile_index;
+	int res;
+
+	impl = calloc(1, sizeof(*impl));
+	if (impl == NULL)
+		return NULL;
+
+	pa_alsa_refcnt_inc();
+
+	snprintf(device_id, sizeof(device_id), "%d", index);
+
+	impl->proplist = pa_proplist_new_dict(props);
+
+	card = &impl->card;
+	card->index = index;
+	card->active_profile_index = ACP_INVALID_INDEX;
+
+	impl->use_ucm = true;
+	impl->auto_profile = true;
+	impl->auto_port = true;
+	impl->ignore_dB = false;
+	impl->rate = DEFAULT_RATE;
+
+	if (props) {
+		if ((s = acp_dict_lookup(props, "api.alsa.use-ucm")) != NULL)
+			impl->use_ucm = spa_atob(s);
+		if ((s = acp_dict_lookup(props, "api.alsa.soft-mixer")) != NULL)
+			impl->soft_mixer = spa_atob(s);
+		if ((s = acp_dict_lookup(props, "api.alsa.ignore-dB")) != NULL)
+			impl->ignore_dB = spa_atob(s);
+		if ((s = acp_dict_lookup(props, "device.profile-set")) != NULL)
+			profile_set = s;
+		if ((s = acp_dict_lookup(props, "device.profile")) != NULL)
+			profile = s;
+		if ((s = acp_dict_lookup(props, "api.acp.auto-profile")) != NULL)
+			impl->auto_profile = spa_atob(s);
+		if ((s = acp_dict_lookup(props, "api.acp.auto-port")) != NULL)
+			impl->auto_port = spa_atob(s);
+		if ((s = acp_dict_lookup(props, "api.acp.probe-rate")) != NULL)
+			impl->rate = atoi(s);
+	}
+
+	impl->ucm.default_sample_spec.format = PA_SAMPLE_S16NE;
+	impl->ucm.default_sample_spec.rate = impl->rate;
+	impl->ucm.default_sample_spec.channels = 2;
+	pa_channel_map_init_extend(&impl->ucm.default_channel_map,
+			impl->ucm.default_sample_spec.channels, PA_CHANNEL_MAP_ALSA);
+	impl->ucm.default_n_fragments = 4;
+	impl->ucm.default_fragment_size_msec = 25;
+
+	impl->ucm.mixers = pa_hashmap_new_full(pa_idxset_string_hash_func,
+			pa_idxset_string_compare_func,
+			pa_xfree, (pa_free_cb_t) pa_alsa_mixer_free);
+	impl->profiles = pa_hashmap_new_full(pa_idxset_string_hash_func,
+			pa_idxset_string_compare_func, NULL,
+			(pa_free_cb_t) profile_free);
+	impl->ports = pa_hashmap_new_full(pa_idxset_string_hash_func,
+			pa_idxset_string_compare_func, NULL,
+			(pa_free_cb_t) port_free);
+
+	snd_config_update_free_global();
+
+	res = impl->use_ucm ? pa_alsa_ucm_query_profiles(&impl->ucm, card->index) : -1;
+	if (res == -PA_ALSA_ERR_UCM_LINKED) {
+		res = -ENOENT;
+		goto error;
+	}
+	if (res == 0) {
+		pa_log_info("Found UCM profiles");
+		impl->profile_set = pa_alsa_ucm_add_profile_set(&impl->ucm, &impl->ucm.default_channel_map);
+	} else {
+		impl->use_ucm = false;
+		impl->profile_set = pa_alsa_profile_set_new(profile_set, &impl->ucm.default_channel_map);
+	}
+	if (impl->profile_set == NULL) {
+		res = -ENOTSUP;
+		goto error;
+	}
+
+	impl->profile_set->ignore_dB = impl->ignore_dB;
+
+	pa_alsa_profile_set_probe(impl->profile_set, impl->ucm.mixers,
+			device_id,
+			&impl->ucm.default_sample_spec,
+			impl->ucm.default_n_fragments,
+			impl->ucm.default_fragment_size_msec);
+
+	pa_alsa_init_proplist_card(NULL, impl->proplist, impl->card.index);
+	pa_proplist_sets(impl->proplist, PA_PROP_DEVICE_STRING, device_id);
+	pa_alsa_init_description(impl->proplist, NULL);
+
+	add_profiles(impl);
+	prune_singleton_availability_groups(impl->ports);
+
+	card->n_profiles = pa_dynarray_size(&impl->out.profiles);
+	card->profiles = impl->out.profiles.array.data;
+
+	card->n_ports = pa_dynarray_size(&impl->out.ports);
+	card->ports = impl->out.ports.array.data;
+
+	card->n_devices = pa_dynarray_size(&impl->out.devices);
+	card->devices = impl->out.devices.array.data;
+
+	pa_proplist_as_dict(impl->proplist, &card->props);
+
+	init_jacks(impl);
+
+	if (!impl->auto_profile && profile == NULL)
+		profile = "off";
+
+	profile_index = acp_card_find_best_profile_index(&impl->card, profile);
+	acp_card_set_profile(&impl->card, profile_index, 0);
+
+	init_eld_ctls(impl);
+
+	return &impl->card;
+error:
+	pa_alsa_refcnt_dec();
+	free(impl);
+	errno = -res;
+	return NULL;
+}
+
+void acp_card_add_listener(struct acp_card *card,
+		const struct acp_card_events *events, void *user_data)
+{
+	pa_card *impl = (pa_card *)card;
+	impl->events = events;
+	impl->user_data = user_data;
+}
+
+void acp_card_destroy(struct acp_card *card)
+{
+	pa_card *impl = (pa_card *)card;
+	if (impl->profiles)
+		pa_hashmap_free(impl->profiles);
+	if (impl->ports)
+		pa_hashmap_free(impl->ports);
+	pa_dynarray_clear(&impl->out.devices);
+	pa_dynarray_clear(&impl->out.profiles);
+	pa_dynarray_clear(&impl->out.ports);
+	if (impl->ucm.mixers)
+		pa_hashmap_free(impl->ucm.mixers);
+	if (impl->jacks)
+		pa_hashmap_free(impl->jacks);
+	if (impl->profile_set)
+		pa_alsa_profile_set_free(impl->profile_set);
+	pa_alsa_ucm_free(&impl->ucm);
+	pa_proplist_free(impl->proplist);
+	pa_alsa_refcnt_dec();
+	free(impl);
+}
+
+int acp_card_poll_descriptors_count(struct acp_card *card)
+{
+	pa_card *impl = (pa_card *)card;
+	void *state;
+	pa_alsa_mixer *pm;
+	int n, count = 0;
+
+	PA_HASHMAP_FOREACH(pm, impl->ucm.mixers, state) {
+		if (!pm->used_for_poll)
+			continue;
+		n = snd_mixer_poll_descriptors_count(pm->mixer_handle);
+		if (n < 0)
+			return n;
+		count += n;
+	}
+	return count;
+}
+
+int acp_card_poll_descriptors(struct acp_card *card, struct pollfd *pfds, unsigned int space)
+{
+	pa_card *impl = (pa_card *)card;
+	void *state;
+	pa_alsa_mixer *pm;
+	int n, count = 0;
+
+	PA_HASHMAP_FOREACH(pm, impl->ucm.mixers, state) {
+		if (!pm->used_for_poll)
+			continue;
+
+		n = snd_mixer_poll_descriptors(pm->mixer_handle, pfds, space);
+		if (n < 0)
+			return n;
+		if (space >= (unsigned int) n) {
+			count += n;
+			space -= n;
+			pfds += n;
+		} else
+			space = 0;
+	}
+	return count;
+}
+
+int acp_card_poll_descriptors_revents(struct acp_card *card, struct pollfd *pfds,
+		unsigned int nfds, unsigned short *revents)
+{
+	unsigned int idx;
+	unsigned short res;
+	if (nfds == 0)
+		return -EINVAL;
+	res = 0;
+	for (idx = 0; idx < nfds; idx++, pfds++)
+		res |= pfds->revents & (POLLIN|POLLERR|POLLNVAL);
+	*revents = res;
+	return 0;
+}
+
+int acp_card_handle_events(struct acp_card *card)
+{
+	pa_card *impl = (pa_card *)card;
+	void *state;
+	pa_alsa_mixer *pm;
+	int n, count = 0;
+
+	PA_HASHMAP_FOREACH(pm, impl->ucm.mixers, state) {
+		if (!pm->used_for_poll)
+			continue;
+
+		n = snd_mixer_handle_events(pm->mixer_handle);
+		if (n < 0)
+			return n;
+		count += n;
+	}
+	return count;
+}
+
+static void sync_mixer(pa_alsa_device *d, pa_device_port *port)
+{
+	pa_alsa_setting *setting = NULL;
+
+	if (!d->mixer_path)
+		return;
+
+	/* port may be NULL, because if we use a synthesized mixer path, then the
+	 * sink has no ports. */
+	if (port && !d->ucm_context) {
+		pa_alsa_port_data *data;
+		data = PA_DEVICE_PORT_DATA(port);
+		setting = data->setting;
+	}
+
+	if (d->mixer_handle)
+		pa_alsa_path_select(d->mixer_path, setting, d->mixer_handle, d->muted);
+
+	if (d->set_mute)
+		d->set_mute(d, d->muted);
+	if (d->set_volume)
+		d->set_volume(d, &d->real_volume);
+}
+
+
+uint32_t acp_device_find_best_port_index(struct acp_device *dev, const char *name)
+{
+	uint32_t i;
+	uint32_t best, best2, best3;
+	struct acp_port **ports = dev->ports;
+
+	best = best2 = best3 = ACP_INVALID_INDEX;
+
+	for (i = 0; i < dev->n_ports; i++) {
+		struct acp_port *p = ports[i];
+
+		if (name) {
+			if (spa_streq(name, p->name))
+				best = i;
+		} else if (p->available == ACP_AVAILABLE_YES) {
+			if (best == ACP_INVALID_INDEX || p->priority > ports[best]->priority)
+				best = i;
+		} else if (p->available != ACP_AVAILABLE_NO) {
+			if (best2 == ACP_INVALID_INDEX || p->priority > ports[best2]->priority)
+				best2 = i;
+		} else {
+			if (best3 == ACP_INVALID_INDEX || p->priority > ports[best3]->priority)
+				best3 = i;
+		}
+	}
+	if (best == ACP_INVALID_INDEX)
+		best = best2;
+	if (best == ACP_INVALID_INDEX)
+		best = best3;
+	if (best == ACP_INVALID_INDEX)
+		best = 0;
+	if (best < dev->n_ports)
+		return ports[best]->index;
+	else
+		return ACP_INVALID_INDEX;
+}
+
+int acp_device_set_port(struct acp_device *dev, uint32_t port_index, uint32_t flags)
+{
+	pa_alsa_device *d = (pa_alsa_device*)dev;
+	pa_card *impl = d->card;
+	pa_device_port *p, *old = d->active_port;
+	int res;
+
+	if (port_index >= impl->card.n_ports)
+		return -EINVAL;
+
+	p = (pa_device_port*)impl->card.ports[port_index];
+	if (!pa_hashmap_get(d->ports, p->name))
+		return -EINVAL;
+
+	p->port.flags = ACP_PORT_ACTIVE | flags;
+	if (p == old)
+		return 0;
+	if (old)
+		old->port.flags &= ~(ACP_PORT_ACTIVE | ACP_PORT_SAVE);
+	d->active_port = p;
+
+	if (impl->use_ucm) {
+		pa_alsa_ucm_port_data *data;
+
+		data = PA_DEVICE_PORT_DATA(p);
+		d->mixer_path = data->path;
+		mixer_volume_init(impl, d);
+
+		sync_mixer(d, p);
+		res = pa_alsa_ucm_set_port(d->ucm_context, p,
+					dev->direction == ACP_DIRECTION_PLAYBACK);
+	} else {
+		pa_alsa_port_data *data;
+
+		data = PA_DEVICE_PORT_DATA(p);
+		d->mixer_path = data->path;
+		mixer_volume_init(impl, d);
+
+		sync_mixer(d, p);
+		res = 0;
+#if 0
+		if (data->suspend_when_unavailable && p->available == PA_AVAILABLE_NO)
+			pa_sink_suspend(s, true, PA_SUSPEND_UNAVAILABLE);
+		else
+			pa_sink_suspend(s, false, PA_SUSPEND_UNAVAILABLE);
+#endif
+	}
+	if (impl->events && impl->events->port_changed)
+		impl->events->port_changed(impl->user_data,
+				old ? old->port.index : 0, p->port.index);
+	return res;
+}
+
+int acp_device_set_volume(struct acp_device *dev, const float *volume, uint32_t n_volume)
+{
+	pa_alsa_device *d = (pa_alsa_device*)dev;
+	pa_card *impl = d->card;
+	uint32_t i;
+	pa_cvolume v, old_volume;
+
+	if (n_volume == 0)
+		return -EINVAL;
+
+	old_volume = d->real_volume;
+
+	v.channels = d->mapping->channel_map.channels;
+	for (i = 0; i < v.channels; i++)
+		v.values[i] = pa_sw_volume_from_linear(volume[i % n_volume]);
+
+	pa_log_info("Set %s volume: min:%d max:%d",
+			d->set_volume ? "hardware" : "software",
+			pa_cvolume_min(&v), pa_cvolume_max(&v));
+
+	for (i = 0; i < v.channels; i++)
+		pa_log_debug("  %d: %d", i, v.values[i]);
+
+	if (d->set_volume) {
+		d->set_volume(d, &v);
+	} else {
+		d->real_volume = v;
+		d->soft_volume = v;
+	}
+	if (!pa_cvolume_equal(&d->real_volume, &old_volume))
+		if (impl->events && impl->events->volume_changed)
+			impl->events->volume_changed(impl->user_data, dev);
+	return 0;
+}
+
+static int get_volume(pa_cvolume *v, float *volume, uint32_t n_volume)
+{
+	uint32_t i;
+	if (v->channels == 0)
+		return -EIO;
+	for (i = 0; i < n_volume; i++)
+		volume[i] = pa_sw_volume_to_linear(v->values[i % v->channels]);
+	return 0;
+}
+
+int acp_device_get_soft_volume(struct acp_device *dev, float *volume, uint32_t n_volume)
+{
+	pa_alsa_device *d = (pa_alsa_device*)dev;
+	return get_volume(&d->soft_volume, volume, n_volume);
+}
+
+int acp_device_get_volume(struct acp_device *dev, float *volume, uint32_t n_volume)
+{
+	pa_alsa_device *d = (pa_alsa_device*)dev;
+	return get_volume(&d->real_volume, volume, n_volume);
+}
+
+int acp_device_set_mute(struct acp_device *dev, bool mute)
+{
+	pa_alsa_device *d = (pa_alsa_device*)dev;
+	pa_card *impl = d->card;
+	bool old_muted = d->muted;
+
+	if (old_muted == mute)
+		return 0;
+
+	pa_log_info("Set %s mute: %d", d->set_mute ? "hardware" : "software", mute);
+
+	if (d->set_mute) {
+		d->set_mute(d, mute);
+	} else  {
+		d->muted = mute;
+	}
+	if (old_muted != mute)
+		if (impl->events && impl->events->mute_changed)
+			impl->events->mute_changed(impl->user_data, dev);
+
+	return 0;
+}
+
+int acp_device_get_mute(struct acp_device *dev, bool *mute)
+{
+	pa_alsa_device *d = (pa_alsa_device*)dev;
+	*mute = d->muted;
+	return 0;
+}
+
+void acp_set_log_func(acp_log_func func, void *data)
+{
+	_acp_log_func = func;
+	_acp_log_data = data;
+}
+void acp_set_log_level(int level)
+{
+	_acp_log_level = level;
+}
diff --git a/spa/plugins/alsa/acp/acp.h b/spa/plugins/alsa/acp/acp.h
new file mode 100644
index 0000000..3fed6f6
--- /dev/null
+++ b/spa/plugins/alsa/acp/acp.h
@@ -0,0 +1,308 @@
+/* ALSA Card Profile
+ *
+ * Copyright © 2020 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef ACP_H
+#define ACP_H
+
+#ifdef __cplusplus
+extern "C" {
+#else
+#include <stdbool.h>
+#endif
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <poll.h>
+
+#ifdef __GNUC__
+#define ACP_PRINTF_FUNC(fmt, arg1) __attribute__((format(printf, fmt, arg1)))
+#else
+#define ACP_PRINTF_FUNC(fmt, arg1)
+#endif
+
+#define ACP_INVALID_INDEX	((uint32_t)-1)
+#define ACP_MAX_CHANNELS	64
+
+struct acp_dict_item {
+	const char *key;
+	const char *value;
+};
+#define ACP_DICT_ITEM_INIT(key,value) ((struct acp_dict_item) { (key), (value) })
+
+struct acp_dict {
+	uint32_t flags;
+	uint32_t n_items;
+	const struct acp_dict_item *items;
+};
+
+enum acp_channel {
+	ACP_CHANNEL_UNKNOWN,		/**< unspecified */
+	ACP_CHANNEL_NA,			/**< N/A, silent */
+
+	ACP_CHANNEL_MONO,		/**< mono stream */
+
+	ACP_CHANNEL_FL,			/**< front left */
+	ACP_CHANNEL_FR,			/**< front right */
+	ACP_CHANNEL_FC,			/**< front center */
+	ACP_CHANNEL_LFE,		/**< LFE */
+	ACP_CHANNEL_SL,			/**< side left */
+	ACP_CHANNEL_SR,			/**< side right */
+	ACP_CHANNEL_FLC,		/**< front left center */
+	ACP_CHANNEL_FRC,		/**< front right center */
+	ACP_CHANNEL_RC,			/**< rear center */
+	ACP_CHANNEL_RL,			/**< rear left */
+	ACP_CHANNEL_RR,			/**< rear right */
+	ACP_CHANNEL_TC,			/**< top center */
+	ACP_CHANNEL_TFL,		/**< top front left */
+	ACP_CHANNEL_TFC,		/**< top front center */
+	ACP_CHANNEL_TFR,		/**< top front right */
+	ACP_CHANNEL_TRL,		/**< top rear left */
+	ACP_CHANNEL_TRC,		/**< top rear center */
+	ACP_CHANNEL_TRR,		/**< top rear right */
+	ACP_CHANNEL_RLC,		/**< rear left center */
+	ACP_CHANNEL_RRC,		/**< rear right center */
+	ACP_CHANNEL_FLW,		/**< front left wide */
+	ACP_CHANNEL_FRW,		/**< front right wide */
+	ACP_CHANNEL_LFE2,		/**< LFE 2 */
+	ACP_CHANNEL_FLH,		/**< front left high */
+	ACP_CHANNEL_FCH,		/**< front center high */
+	ACP_CHANNEL_FRH,		/**< front right high */
+	ACP_CHANNEL_TFLC,		/**< top front left center */
+	ACP_CHANNEL_TFRC,		/**< top front right center */
+	ACP_CHANNEL_TSL,		/**< top side left */
+	ACP_CHANNEL_TSR,		/**< top side right */
+	ACP_CHANNEL_LLFE,		/**< left LFE */
+	ACP_CHANNEL_RLFE,		/**< right LFE */
+	ACP_CHANNEL_BC,			/**< bottom center */
+	ACP_CHANNEL_BLC,		/**< bottom left center */
+	ACP_CHANNEL_BRC,		/**< bottom right center */
+
+	ACP_CHANNEL_START_Aux  = 0x1000,
+	ACP_CHANNEL_LAST_Aux  = 0x1fff,
+
+	ACP_CHANNEL_START_Custom  = 0x10000,
+};
+
+char *acp_channel_str(char *buf, size_t len, enum acp_channel ch);
+
+struct acp_format {
+	uint32_t flags;
+	uint32_t format_mask;
+	uint32_t rate_mask;
+	uint32_t channels;
+	uint32_t map[ACP_MAX_CHANNELS];
+};
+
+#define ACP_DICT_INIT(items,n_items) ((struct acp_dict) { 0, (n_items), (items) })
+#define ACP_DICT_INIT_ARRAY(items) ((struct acp_dict) { 0, sizeof(items)/sizeof((items)[0]), (items) })
+
+#define acp_dict_for_each(item, dict)				\
+	for ((item) = (dict)->items;				\
+	     (item) < &(dict)->items[(dict)->n_items];		\
+	     (item)++)
+
+enum acp_direction {
+	ACP_DIRECTION_PLAYBACK = 1,
+	ACP_DIRECTION_CAPTURE = 2
+};
+
+const char *acp_direction_str(enum acp_direction direction);
+
+enum acp_available {
+	ACP_AVAILABLE_UNKNOWN = 0,
+	ACP_AVAILABLE_NO = 1,
+	ACP_AVAILABLE_YES = 2
+};
+
+const char *acp_available_str(enum acp_available status);
+
+#define ACP_KEY_PORT_TYPE		"port.type"		/**< a Port type, like "aux", "speaker", ... */
+#define ACP_KEY_PORT_AVAILABILITY_GROUP	"port.availability-group"
+		/**< An identifier for the group of ports that share their availability status with
+		 * each other. This is meant especially for handling cases where one 3.5 mm connector
+		 * is used for headphones, headsets and microphones, and the hardware can only tell
+		 * that something was plugged in but not what exactly. In this situation the ports for
+		 * all those devices share their availability status, and ACP can't tell which
+		 * one is actually plugged in, and some application may ask the user what was plugged
+		 * in. Such applications should get a list of all card ports and compare their
+		 * `available_group` fields. Ports that have the same group are those that need
+		 * input from the user to determine which device was plugged in. The application should
+		 * then activate the user-chosen port.
+		 *
+		 * May be NULL, in which case the port is not part of any availability group (which is
+		 * the same as having a group with only one member).
+		 *
+		 * The group identifier must be treated as an opaque identifier. The string may look
+		 * like an ALSA control name, but applications must not assume any such relationship.
+		 * The group naming scheme can change without a warning.
+		 */
+
+struct acp_device;
+
+struct acp_card_events {
+#define ACP_VERSION_CARD_EVENTS	0
+	uint32_t version;
+
+	void (*destroy) (void *data);
+
+	void (*props_changed) (void *data);
+
+	void (*profile_changed) (void *data, uint32_t old_index, uint32_t new_index);
+
+	void (*profile_available) (void *data, uint32_t index,
+			enum acp_available old, enum acp_available available);
+
+	void (*port_changed) (void *data, uint32_t old_index, uint32_t new_index);
+
+	void (*port_available) (void *data, uint32_t index,
+			enum acp_available old, enum acp_available available);
+
+	void (*volume_changed) (void *data, struct acp_device *dev);
+	void (*mute_changed) (void *data, struct acp_device *dev);
+};
+
+struct acp_port {
+	uint32_t index;			/**< unique index for this port */
+#define ACP_PORT_ACTIVE		(1<<0)
+#define ACP_PORT_SAVE		(1<<1)	/* if the port needs saving */
+	uint32_t flags;			/**< extra port flags */
+
+	const char *name;		/**< Name of this port */
+	const char *description;	/**< Description of this port */
+	uint32_t priority;		/**< The higher this value is, the more useful this port is as a default. */
+	enum acp_direction direction;
+	enum acp_available available;	/**< A flags (see #acp_port_available), indicating availability status of this port. */
+	struct acp_dict props;		/**< extra port properties */
+
+	uint32_t n_profiles;		/**< number of elements in profiles array */
+	struct acp_card_profile **profiles;	/**< array of profiles for this port */
+
+	uint32_t n_devices;		/**< number of elements in devices array */
+	struct acp_device **devices;	/**< array of devices */
+};
+
+struct acp_device {
+	uint32_t index;
+#define ACP_DEVICE_ACTIVE	(1<<0)
+#define ACP_DEVICE_HW_VOLUME	(1<<1)
+#define ACP_DEVICE_HW_MUTE	(1<<2)
+#define ACP_DEVICE_UCM_DEVICE	(1<<3)
+#define ACP_DEVICE_IEC958	(1<<4)
+	uint32_t flags;
+
+	const char *name;
+	const char *description;
+	uint32_t priority;
+	enum acp_direction direction;
+	struct acp_dict props;
+
+	const char **device_strings;
+	struct acp_format format;
+
+	float base_volume;
+	float volume_step;
+
+	uint32_t n_ports;
+	struct acp_port **ports;
+
+	int64_t latency_ns;
+	uint32_t codecs[32];
+	uint32_t n_codecs;
+};
+
+struct acp_card_profile {
+	uint32_t index;
+#define ACP_PROFILE_ACTIVE	(1<<0)
+#define ACP_PROFILE_OFF		(1<<1)		/* the Off profile */
+#define ACP_PROFILE_SAVE	(1<<2)		/* if the profile needs saving */
+#define ACP_PROFILE_PRO		(1<<3)		/* the Pro profile */
+	uint32_t flags;
+
+	const char *name;
+	const char *description;
+	uint32_t priority;
+	enum acp_available available;
+	struct acp_dict props;
+
+	uint32_t n_devices;
+	struct acp_device **devices;
+};
+
+struct acp_card {
+	uint32_t index;
+	uint32_t flags;
+
+	struct acp_dict props;
+
+	uint32_t n_profiles;
+	uint32_t active_profile_index;
+	struct acp_card_profile **profiles;
+
+	uint32_t n_devices;
+	struct acp_device **devices;
+
+	uint32_t n_ports;
+	struct acp_port **ports;
+	uint32_t preferred_input_port_index;
+	uint32_t preferred_output_port_index;
+};
+
+struct acp_card *acp_card_new(uint32_t index, const struct acp_dict *props);
+
+void acp_card_add_listener(struct acp_card *card,
+		const struct acp_card_events *events, void *user_data);
+
+void acp_card_destroy(struct acp_card *card);
+
+int acp_card_poll_descriptors_count(struct acp_card *card);
+int acp_card_poll_descriptors(struct acp_card *card, struct pollfd *pfds, unsigned int space);
+int acp_card_poll_descriptors_revents(struct acp_card *card, struct pollfd *pfds,
+		unsigned int nfds, unsigned short *revents);
+int acp_card_handle_events(struct acp_card *card);
+
+uint32_t acp_card_find_best_profile_index(struct acp_card *card, const char *name);
+int acp_card_set_profile(struct acp_card *card, uint32_t profile_index, uint32_t flags);
+
+uint32_t acp_device_find_best_port_index(struct acp_device *dev, const char *name);
+int acp_device_set_port(struct acp_device *dev, uint32_t port_index, uint32_t flags);
+
+int acp_device_set_volume(struct acp_device *dev, const float *volume, uint32_t n_volume);
+int acp_device_get_soft_volume(struct acp_device *dev, float *volume, uint32_t n_volume);
+int acp_device_get_volume(struct acp_device *dev, float *volume, uint32_t n_volume);
+int acp_device_set_mute(struct acp_device *dev, bool mute);
+int acp_device_get_mute(struct acp_device *dev, bool *mute);
+
+typedef void (*acp_log_func) (void *data,
+		int level, const char *file, int line, const char *func,
+		const char *fmt, va_list arg) ACP_PRINTF_FUNC(6,0);
+
+void acp_set_log_func(acp_log_func, void *data);
+void acp_set_log_level(int level);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ACP_H */
diff --git a/spa/plugins/alsa/acp/alsa-mixer.c b/spa/plugins/alsa/acp/alsa-mixer.c
new file mode 100644
index 0000000..86425fd
--- /dev/null
+++ b/spa/plugins/alsa/acp/alsa-mixer.c
@@ -0,0 +1,5398 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2009 Lennart Poettering
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "config.h"
+
+#include <sys/types.h>
+#include <alsa/asoundlib.h>
+#include <math.h>
+
+#include <valgrind/memcheck.h>
+
+#include "conf-parser.h"
+#include "alsa-mixer.h"
+#include "alsa-util.h"
+
+static int setting_select(pa_alsa_setting *s, snd_mixer_t *m);
+
+struct description_map {
+    const char *key;
+    const char *description;
+};
+
+struct description2_map {
+    const char *key;
+    const char *description;
+    pa_device_port_type_t type;
+};
+
+char *pa_alsa_mixer_id_to_string(char *dst, size_t dst_len, pa_alsa_mixer_id *id) {
+    if (id->index > 0) {
+        snprintf(dst, dst_len, "'%s',%d", id->name, id->index);
+    } else {
+        snprintf(dst, dst_len, "'%s'", id->name);
+    }
+    return dst;
+}
+
+static int alsa_id_decode(const char *src, char *name, int *index) {
+    char *idx, c;
+    int i;
+
+    *index = 0;
+    c = src[0];
+    /* Strip quotes in entries such as 'Speaker',1 or "Speaker",1 */
+    if (c == '\'' || c == '"') {
+        strcpy(name, src + 1);
+        for (i = 0; name[i] != '\0' && name[i] != c; i++);
+        idx = NULL;
+        if (name[i]) {
+                name[i] = '\0';
+                idx = strchr(name + i + 1, ',');
+        }
+    } else {
+        strcpy(name, src);
+        idx = strchr(name, ',');
+    }
+    if (idx == NULL)
+        return 0;
+    *idx = '\0';
+    idx++;
+    if (*idx < '0' || *idx > '9') {
+        pa_log("Element %s: index value is invalid", src);
+        return 1;
+    }
+    *index = atoi(idx);
+    return 0;
+}
+
+pa_alsa_jack *pa_alsa_jack_new(pa_alsa_path *path, const char *mixer_device_name, const char *name, int index) {
+    pa_alsa_jack *jack;
+
+    pa_assert(name);
+
+    jack = pa_xnew0(pa_alsa_jack, 1);
+    jack->path = path;
+    jack->mixer_device_name = pa_xstrdup(mixer_device_name);
+    jack->name = pa_xstrdup(name);
+    jack->alsa_id.name = pa_sprintf_malloc("%s Jack", name);
+    jack->alsa_id.index = index;
+    jack->state_unplugged = PA_AVAILABLE_NO;
+    jack->state_plugged = PA_AVAILABLE_YES;
+    jack->ucm_devices = pa_dynarray_new(NULL);
+    jack->ucm_hw_mute_devices = pa_dynarray_new(NULL);
+
+    return jack;
+}
+
+void pa_alsa_jack_free(pa_alsa_jack *jack) {
+    pa_assert(jack);
+
+    pa_dynarray_free(jack->ucm_hw_mute_devices);
+    pa_dynarray_free(jack->ucm_devices);
+
+    pa_xfree(jack->alsa_id.name);
+    pa_xfree(jack->name);
+    pa_xfree(jack->mixer_device_name);
+    pa_xfree(jack);
+}
+
+void pa_alsa_jack_set_has_control(pa_alsa_jack *jack, bool has_control) {
+    pa_alsa_ucm_device *device;
+    unsigned idx;
+
+    pa_assert(jack);
+
+    if (has_control == jack->has_control)
+        return;
+
+    jack->has_control = has_control;
+
+    PA_DYNARRAY_FOREACH(device, jack->ucm_hw_mute_devices, idx)
+        pa_alsa_ucm_device_update_available(device);
+
+    PA_DYNARRAY_FOREACH(device, jack->ucm_devices, idx)
+        pa_alsa_ucm_device_update_available(device);
+}
+
+void pa_alsa_jack_set_plugged_in(pa_alsa_jack *jack, bool plugged_in) {
+    pa_alsa_ucm_device *device;
+    unsigned idx;
+
+    pa_assert(jack);
+
+    if (plugged_in == jack->plugged_in)
+        return;
+
+    jack->plugged_in = plugged_in;
+
+    /* XXX: If this is a headphone jack that mutes speakers when plugged in,
+     * and the headphones get unplugged, then the headphone device must be set
+     * to unavailable and the speaker device must be set to unknown. So far so
+     * good. But there's an ugly detail: we must first set the availability of
+     * the speakers and then the headphones. We shouldn't need to care about
+     * the order, but we have to, because module-switch-on-port-available gets
+     * separate events for the two devices, and the intermediate state between
+     * the two events is such that the second event doesn't trigger the desired
+     * port switch, if the event order is "wrong".
+     *
+     * These are the transitions when the event order is "right":
+     *
+     *     speakers:   1) unavailable -> 2) unknown   -> 3) unknown
+     *     headphones: 1) available   -> 2) available -> 3) unavailable
+     *
+     * In the 2 -> 3 transition, headphones become unavailable, and
+     * module-switch-on-port-available sees that speakers can be used, so the
+     * port gets changed as it should.
+     *
+     * These are the transitions when the event order is "wrong":
+     *
+     *     speakers:   1) unavailable -> 2) unavailable -> 3) unknown
+     *     headphones: 1) available   -> 2) unavailable -> 3) unavailable
+     *
+     * In the 1 -> 2 transition, headphones become unavailable, and there are
+     * no available ports to use, so no port change happens. In the 2 -> 3
+     * transition, speaker availability becomes unknown, but that's not
+     * a strong enough signal for module-switch-on-port-available, so it still
+     * doesn't do the port switch.
+     *
+     * We should somehow merge the two events so that
+     * module-switch-on-port-available would handle both transitions in one go.
+     * If module-switch-on-port-available used a defer event to delay
+     * the port availability processing, that would probably do the trick. */
+
+    PA_DYNARRAY_FOREACH(device, jack->ucm_hw_mute_devices, idx)
+        pa_alsa_ucm_device_update_available(device);
+
+    PA_DYNARRAY_FOREACH(device, jack->ucm_devices, idx)
+        pa_alsa_ucm_device_update_available(device);
+}
+
+void pa_alsa_jack_add_ucm_device(pa_alsa_jack *jack, pa_alsa_ucm_device *device) {
+    pa_alsa_ucm_device *idevice;
+    unsigned idx, prio, iprio;
+
+    pa_assert(jack);
+    pa_assert(device);
+
+    /* store the ucm device with the sequence of priority from low to high. this
+     * could guarantee when the jack state is changed, the device with highest
+     * priority will send to the module-switch-on-port-available last */
+    prio = device->playback_priority ? device->playback_priority : device->capture_priority;
+
+    PA_DYNARRAY_FOREACH(idevice, jack->ucm_devices, idx) {
+        iprio = idevice->playback_priority ? idevice->playback_priority : idevice->capture_priority;
+        if (iprio > prio)
+            break;
+    }
+    pa_dynarray_insert_by_index(jack->ucm_devices, device, idx);
+}
+
+void pa_alsa_jack_add_ucm_hw_mute_device(pa_alsa_jack *jack, pa_alsa_ucm_device *device) {
+    pa_assert(jack);
+    pa_assert(device);
+
+    pa_dynarray_append(jack->ucm_hw_mute_devices, device);
+}
+
+static const char *lookup_description(const char *key, const struct description_map dm[], unsigned n) {
+    unsigned i;
+
+    if (!key)
+        return NULL;
+
+    for (i = 0; i < n; i++)
+        if (pa_streq(dm[i].key, key))
+            return _(dm[i].description);
+
+    return NULL;
+}
+
+static const struct description2_map *lookup_description2(const char *key, const struct description2_map dm[], unsigned n) {
+    unsigned i;
+
+    if (!key)
+        return NULL;
+
+    for (i = 0; i < n; i++)
+        if (pa_streq(dm[i].key, key))
+            return &dm[i];
+
+    return NULL;
+}
+
+void pa_alsa_mixer_use_for_poll(pa_hashmap *mixers, snd_mixer_t *mixer_handle)
+{
+    pa_alsa_mixer *pm;
+    void *state;
+
+    PA_HASHMAP_FOREACH(pm, mixers, state) {
+        if (pm->mixer_handle == mixer_handle) {
+            pm->used_for_probe_only = false;
+	    pm->used_for_poll = true;
+	}
+    }
+}
+
+#if 0
+struct pa_alsa_fdlist {
+    unsigned num_fds;
+    struct pollfd *fds;
+    /* This is a temporary buffer used to avoid lots of mallocs */
+    struct pollfd *work_fds;
+
+    snd_mixer_t *mixer;
+    snd_hctl_t *hctl;
+
+    pa_mainloop_api *m;
+    pa_defer_event *defer;
+    pa_io_event **ios;
+
+    bool polled;
+
+    void (*cb)(void *userdata);
+    void *userdata;
+};
+
+static void io_cb(pa_mainloop_api *a, pa_io_event *e, int fd, pa_io_event_flags_t events, void *userdata) {
+
+    struct pa_alsa_fdlist *fdl = userdata;
+    int err;
+    unsigned i;
+    unsigned short revents;
+
+    pa_assert(a);
+    pa_assert(fdl);
+    pa_assert(fdl->mixer || fdl->hctl);
+    pa_assert(fdl->fds);
+    pa_assert(fdl->work_fds);
+
+    if (fdl->polled)
+        return;
+
+    fdl->polled = true;
+
+    memcpy(fdl->work_fds, fdl->fds, sizeof(struct pollfd) * fdl->num_fds);
+
+    for (i = 0; i < fdl->num_fds; i++) {
+        if (e == fdl->ios[i]) {
+            if (events & PA_IO_EVENT_INPUT)
+                fdl->work_fds[i].revents |= POLLIN;
+            if (events & PA_IO_EVENT_OUTPUT)
+                fdl->work_fds[i].revents |= POLLOUT;
+            if (events & PA_IO_EVENT_ERROR)
+                fdl->work_fds[i].revents |= POLLERR;
+            if (events & PA_IO_EVENT_HANGUP)
+                fdl->work_fds[i].revents |= POLLHUP;
+            break;
+        }
+    }
+
+    pa_assert(i != fdl->num_fds);
+
+    if (fdl->hctl)
+        err = snd_hctl_poll_descriptors_revents(fdl->hctl, fdl->work_fds, fdl->num_fds, &revents);
+    else
+        err = snd_mixer_poll_descriptors_revents(fdl->mixer, fdl->work_fds, fdl->num_fds, &revents);
+
+    if (err < 0) {
+        pa_log_error("Unable to get poll revent: %s", pa_alsa_strerror(err));
+        return;
+    }
+
+    a->defer_enable(fdl->defer, 1);
+
+    if (revents) {
+        if (fdl->hctl)
+            snd_hctl_handle_events(fdl->hctl);
+        else
+            snd_mixer_handle_events(fdl->mixer);
+    }
+}
+
+static void defer_cb(pa_mainloop_api *a, pa_defer_event *e, void *userdata) {
+    struct pa_alsa_fdlist *fdl = userdata;
+    unsigned num_fds, i;
+    int err, n;
+    struct pollfd *temp;
+
+    pa_assert(a);
+    pa_assert(fdl);
+    pa_assert(fdl->mixer || fdl->hctl);
+
+    a->defer_enable(fdl->defer, 0);
+
+    if (fdl->hctl)
+        n = snd_hctl_poll_descriptors_count(fdl->hctl);
+    else
+        n = snd_mixer_poll_descriptors_count(fdl->mixer);
+
+    if (n < 0) {
+        pa_log("snd_mixer_poll_descriptors_count() failed: %s", pa_alsa_strerror(n));
+        return;
+    }
+    else if (n == 0) {
+        pa_log_warn("Mixer has no poll descriptors. Please control mixer from PulseAudio only.");
+        return;
+    }
+    num_fds = (unsigned) n;
+
+    if (num_fds != fdl->num_fds) {
+        if (fdl->fds)
+            pa_xfree(fdl->fds);
+        if (fdl->work_fds)
+            pa_xfree(fdl->work_fds);
+        fdl->fds = pa_xnew0(struct pollfd, num_fds);
+        fdl->work_fds = pa_xnew(struct pollfd, num_fds);
+    }
+
+    memset(fdl->work_fds, 0, sizeof(struct pollfd) * num_fds);
+
+    if (fdl->hctl)
+        err = snd_hctl_poll_descriptors(fdl->hctl, fdl->work_fds, num_fds);
+    else
+        err = snd_mixer_poll_descriptors(fdl->mixer, fdl->work_fds, num_fds);
+
+    if (err < 0) {
+        pa_log_error("Unable to get poll descriptors: %s", pa_alsa_strerror(err));
+        return;
+    }
+
+    fdl->polled = false;
+
+    if (memcmp(fdl->fds, fdl->work_fds, sizeof(struct pollfd) * num_fds) == 0)
+        return;
+
+    if (fdl->ios) {
+        for (i = 0; i < fdl->num_fds; i++)
+            a->io_free(fdl->ios[i]);
+
+        if (num_fds != fdl->num_fds) {
+            pa_xfree(fdl->ios);
+            fdl->ios = NULL;
+        }
+    }
+
+    if (!fdl->ios)
+        fdl->ios = pa_xnew(pa_io_event*, num_fds);
+
+    /* Swap pointers */
+    temp = fdl->work_fds;
+    fdl->work_fds = fdl->fds;
+    fdl->fds = temp;
+
+    fdl->num_fds = num_fds;
+
+    for (i = 0;i < num_fds;i++)
+        fdl->ios[i] = a->io_new(a, fdl->fds[i].fd,
+            ((fdl->fds[i].events & POLLIN) ? PA_IO_EVENT_INPUT : 0) |
+            ((fdl->fds[i].events & POLLOUT) ? PA_IO_EVENT_OUTPUT : 0),
+            io_cb, fdl);
+}
+
+struct pa_alsa_fdlist *pa_alsa_fdlist_new(void) {
+    struct pa_alsa_fdlist *fdl;
+
+    fdl = pa_xnew0(struct pa_alsa_fdlist, 1);
+
+    return fdl;
+}
+
+void pa_alsa_fdlist_free(struct pa_alsa_fdlist *fdl) {
+    pa_assert(fdl);
+
+    if (fdl->defer) {
+        pa_assert(fdl->m);
+        fdl->m->defer_free(fdl->defer);
+    }
+
+    if (fdl->ios) {
+        unsigned i;
+        pa_assert(fdl->m);
+        for (i = 0; i < fdl->num_fds; i++)
+            fdl->m->io_free(fdl->ios[i]);
+        pa_xfree(fdl->ios);
+    }
+
+    if (fdl->fds)
+        pa_xfree(fdl->fds);
+    if (fdl->work_fds)
+        pa_xfree(fdl->work_fds);
+
+    pa_xfree(fdl);
+}
+
+/* We can listen to either a snd_hctl_t or a snd_mixer_t, but not both */
+int pa_alsa_fdlist_set_handle(struct pa_alsa_fdlist *fdl, snd_mixer_t *mixer_handle, snd_hctl_t *hctl_handle, pa_mainloop_api *m) {
+    pa_assert(fdl);
+    pa_assert(hctl_handle || mixer_handle);
+    pa_assert(!(hctl_handle && mixer_handle));
+    pa_assert(m);
+    pa_assert(!fdl->m);
+
+    fdl->hctl = hctl_handle;
+    fdl->mixer = mixer_handle;
+    fdl->m = m;
+    fdl->defer = m->defer_new(m, defer_cb, fdl);
+
+    return 0;
+}
+
+struct pa_alsa_mixer_pdata {
+    pa_rtpoll *rtpoll;
+    pa_rtpoll_item *poll_item;
+    snd_mixer_t *mixer;
+};
+
+struct pa_alsa_mixer_pdata *pa_alsa_mixer_pdata_new(void) {
+    struct pa_alsa_mixer_pdata *pd;
+
+    pd = pa_xnew0(struct pa_alsa_mixer_pdata, 1);
+
+    return pd;
+}
+
+void pa_alsa_mixer_pdata_free(struct pa_alsa_mixer_pdata *pd) {
+    pa_assert(pd);
+
+    if (pd->poll_item) {
+        pa_rtpoll_item_free(pd->poll_item);
+    }
+
+    pa_xfree(pd);
+}
+
+static int rtpoll_work_cb(pa_rtpoll_item *i) {
+    struct pa_alsa_mixer_pdata *pd;
+    struct pollfd *p;
+    unsigned n_fds;
+    unsigned short revents = 0;
+    int err, ret = 0;
+
+    pd = pa_rtpoll_item_get_work_userdata(i);
+    pa_assert_fp(pd);
+    pa_assert_fp(i == pd->poll_item);
+
+    p = pa_rtpoll_item_get_pollfd(i, &n_fds);
+
+    if ((err = snd_mixer_poll_descriptors_revents(pd->mixer, p, n_fds, &revents)) < 0) {
+        pa_log_error("Unable to get poll revent: %s", pa_alsa_strerror(err));
+        ret = -1;
+        goto fail;
+    }
+
+    if (revents) {
+        if (revents & (POLLNVAL | POLLERR)) {
+            pa_log_debug("Device disconnected, stopping poll on mixer");
+            goto fail;
+        } else if (revents & POLLERR) {
+            /* This shouldn't happen. */
+            pa_log_error("Got a POLLERR (revents = %04x), stopping poll on mixer", revents);
+            goto fail;
+        }
+
+        err = snd_mixer_handle_events(pd->mixer);
+
+        if (PA_LIKELY(err >= 0)) {
+            pa_rtpoll_item_free(i);
+            pa_alsa_set_mixer_rtpoll(pd, pd->mixer, pd->rtpoll);
+        } else {
+            pa_log_error("Error handling mixer event: %s", pa_alsa_strerror(err));
+            ret = -1;
+            goto fail;
+        }
+    }
+
+    return ret;
+
+fail:
+    pa_rtpoll_item_free(i);
+
+    pd->poll_item = NULL;
+    pd->rtpoll = NULL;
+    pd->mixer = NULL;
+
+    return ret;
+}
+
+int pa_alsa_set_mixer_rtpoll(struct pa_alsa_mixer_pdata *pd, snd_mixer_t *mixer, pa_rtpoll *rtp) {
+    pa_rtpoll_item *i;
+    struct pollfd *p;
+    int err, n;
+
+    pa_assert(pd);
+    pa_assert(mixer);
+    pa_assert(rtp);
+
+    if ((n = snd_mixer_poll_descriptors_count(mixer)) < 0) {
+        pa_log("snd_mixer_poll_descriptors_count() failed: %s", pa_alsa_strerror(n));
+        return -1;
+    }
+    else if (n == 0) {
+        pa_log_warn("Mixer has no poll descriptors. Please control mixer from PulseAudio only.");
+        return 0;
+    }
+
+    i = pa_rtpoll_item_new(rtp, PA_RTPOLL_LATE, (unsigned) n);
+
+    p = pa_rtpoll_item_get_pollfd(i, NULL);
+
+    memset(p, 0, sizeof(struct pollfd) * n);
+
+    if ((err = snd_mixer_poll_descriptors(mixer, p, (unsigned) n)) < 0) {
+        pa_log_error("Unable to get poll descriptors: %s", pa_alsa_strerror(err));
+        pa_rtpoll_item_free(i);
+        return -1;
+    }
+
+    pd->rtpoll = rtp;
+    pd->poll_item = i;
+    pd->mixer = mixer;
+
+    pa_rtpoll_item_set_work_callback(i, rtpoll_work_cb, pd);
+
+    return 0;
+}
+#endif
+
+static const snd_mixer_selem_channel_id_t alsa_channel_ids[PA_CHANNEL_POSITION_MAX] = {
+    [PA_CHANNEL_POSITION_MONO] = SND_MIXER_SCHN_MONO, /* The ALSA name is just an alias! */
+
+    [PA_CHANNEL_POSITION_FRONT_CENTER] = SND_MIXER_SCHN_FRONT_CENTER,
+    [PA_CHANNEL_POSITION_FRONT_LEFT] = SND_MIXER_SCHN_FRONT_LEFT,
+    [PA_CHANNEL_POSITION_FRONT_RIGHT] = SND_MIXER_SCHN_FRONT_RIGHT,
+
+    [PA_CHANNEL_POSITION_REAR_CENTER] = SND_MIXER_SCHN_REAR_CENTER,
+    [PA_CHANNEL_POSITION_REAR_LEFT] = SND_MIXER_SCHN_REAR_LEFT,
+    [PA_CHANNEL_POSITION_REAR_RIGHT] = SND_MIXER_SCHN_REAR_RIGHT,
+
+    [PA_CHANNEL_POSITION_LFE] = SND_MIXER_SCHN_WOOFER,
+
+    [PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER] = SND_MIXER_SCHN_UNKNOWN,
+
+    [PA_CHANNEL_POSITION_SIDE_LEFT] = SND_MIXER_SCHN_SIDE_LEFT,
+    [PA_CHANNEL_POSITION_SIDE_RIGHT] = SND_MIXER_SCHN_SIDE_RIGHT,
+
+    [PA_CHANNEL_POSITION_AUX0] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX1] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX2] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX3] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX4] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX5] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX6] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX7] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX8] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX9] =  SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX10] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX11] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX12] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX13] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX14] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX15] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX16] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX17] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX18] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX19] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX20] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX21] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX22] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX23] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX24] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX25] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX26] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX27] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX28] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX29] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX30] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_AUX31] = SND_MIXER_SCHN_UNKNOWN,
+
+    [PA_CHANNEL_POSITION_TOP_CENTER] = SND_MIXER_SCHN_UNKNOWN,
+
+    [PA_CHANNEL_POSITION_TOP_FRONT_CENTER] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_TOP_FRONT_LEFT] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_TOP_FRONT_RIGHT] = SND_MIXER_SCHN_UNKNOWN,
+
+    [PA_CHANNEL_POSITION_TOP_REAR_CENTER] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_TOP_REAR_LEFT] = SND_MIXER_SCHN_UNKNOWN,
+    [PA_CHANNEL_POSITION_TOP_REAR_RIGHT] = SND_MIXER_SCHN_UNKNOWN
+};
+
+static snd_mixer_selem_channel_id_t alsa_channel_positions[POSITION_MASK_CHANNELS] = {
+    SND_MIXER_SCHN_FRONT_LEFT,
+    SND_MIXER_SCHN_FRONT_RIGHT,
+    SND_MIXER_SCHN_REAR_LEFT,
+    SND_MIXER_SCHN_REAR_RIGHT,
+    SND_MIXER_SCHN_FRONT_CENTER,
+    SND_MIXER_SCHN_WOOFER,
+    SND_MIXER_SCHN_SIDE_LEFT,
+    SND_MIXER_SCHN_SIDE_RIGHT,
+#if POSITION_MASK_CHANNELS > 8
+#error "Extend alsa_channel_positions[] array (9+)"
+#endif
+};
+
+static void setting_free(pa_alsa_setting *s) {
+    pa_assert(s);
+
+    if (s->options)
+        pa_idxset_free(s->options, NULL);
+
+    pa_xfree(s->name);
+    pa_xfree(s->description);
+    pa_xfree(s);
+}
+
+static void option_free(pa_alsa_option *o) {
+    pa_assert(o);
+
+    pa_xfree(o->alsa_name);
+    pa_xfree(o->name);
+    pa_xfree(o->description);
+    pa_xfree(o);
+}
+
+static void decibel_fix_free(pa_alsa_decibel_fix *db_fix) {
+    pa_assert(db_fix);
+
+    pa_xfree(db_fix->name);
+    pa_xfree(db_fix->db_values);
+
+    pa_xfree(db_fix->key);
+    pa_xfree(db_fix);
+}
+
+static void element_free(pa_alsa_element *e) {
+    pa_alsa_option *o;
+    pa_assert(e);
+
+    while ((o = e->options)) {
+        PA_LLIST_REMOVE(pa_alsa_option, e->options, o);
+        option_free(o);
+    }
+
+    if (e->db_fix)
+        decibel_fix_free(e->db_fix);
+
+    pa_xfree(e->alsa_id.name);
+    pa_xfree(e);
+}
+
+void pa_alsa_path_free(pa_alsa_path *p) {
+    pa_alsa_jack *j;
+    pa_alsa_element *e;
+    pa_alsa_setting *s;
+
+    pa_assert(p);
+
+    while ((j = p->jacks)) {
+        PA_LLIST_REMOVE(pa_alsa_jack, p->jacks, j);
+        pa_alsa_jack_free(j);
+    }
+
+    while ((e = p->elements)) {
+        PA_LLIST_REMOVE(pa_alsa_element, p->elements, e);
+        element_free(e);
+    }
+
+    while ((s = p->settings)) {
+        PA_LLIST_REMOVE(pa_alsa_setting, p->settings, s);
+        setting_free(s);
+    }
+
+    pa_proplist_free(p->proplist);
+    pa_xfree(p->availability_group);
+    pa_xfree(p->name);
+    pa_xfree(p->description);
+    pa_xfree(p->description_key);
+    pa_xfree(p);
+}
+
+void pa_alsa_path_set_free(pa_alsa_path_set *ps) {
+    pa_assert(ps);
+
+    if (ps->paths)
+        pa_hashmap_free(ps->paths);
+
+    pa_xfree(ps);
+}
+
+int pa_alsa_path_set_is_empty(pa_alsa_path_set *ps) {
+    if (ps && !pa_hashmap_isempty(ps->paths))
+        return 0;
+    return 1;
+}
+
+static long to_alsa_dB(pa_volume_t v) {
+    return lround(pa_sw_volume_to_dB(v) * 100.0);
+}
+
+static pa_volume_t from_alsa_dB(long v) {
+    return pa_sw_volume_from_dB((double) v / 100.0);
+}
+
+static long to_alsa_volume(pa_volume_t v, long min, long max) {
+    long w;
+
+    w = (long) round(((double) v * (double) (max - min)) / PA_VOLUME_NORM) + min;
+    return PA_CLAMP_UNLIKELY(w, min, max);
+}
+
+static pa_volume_t from_alsa_volume(long v, long min, long max) {
+    return (pa_volume_t) round(((double) (v - min) * PA_VOLUME_NORM) / (double) (max - min));
+}
+
+#define SELEM_INIT(sid, aid)                                     \
+    do {                                                     \
+        snd_mixer_selem_id_alloca(&(sid));                   \
+        snd_mixer_selem_id_set_name((sid), (aid)->name);     \
+        snd_mixer_selem_id_set_index((sid), (aid)->index);   \
+    } while(false)
+
+static int element_get_volume(pa_alsa_element *e, snd_mixer_t *m, const pa_channel_map *cm, pa_cvolume *v) {
+    snd_mixer_selem_id_t *sid;
+    snd_mixer_elem_t *me;
+    snd_mixer_selem_channel_id_t c;
+    pa_channel_position_mask_t mask = 0;
+    char buf[64];
+    unsigned k;
+
+    pa_assert(m);
+    pa_assert(e);
+    pa_assert(cm);
+    pa_assert(v);
+
+    SELEM_INIT(sid, &e->alsa_id);
+    if (!(me = snd_mixer_find_selem(m, sid))) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log_warn("Element %s seems to have disappeared.", buf);
+        return -1;
+    }
+
+    pa_cvolume_mute(v, cm->channels);
+
+    /* We take the highest volume of all channels that match */
+
+    for (c = 0; c <= SND_MIXER_SCHN_LAST; c++) {
+        int r;
+        pa_volume_t f;
+
+        if (e->has_dB) {
+            long value = 0;
+
+            if (e->direction == PA_ALSA_DIRECTION_OUTPUT) {
+                if (snd_mixer_selem_has_playback_channel(me, c)) {
+                    if (e->db_fix) {
+                        if ((r = snd_mixer_selem_get_playback_volume(me, c, &value)) >= 0) {
+                            /* If the channel volume is outside the limits set
+                             * by the dB fix, we clamp the hw volume to be
+                             * within the limits. */
+                            if (value < e->db_fix->min_step) {
+                                value = e->db_fix->min_step;
+                                snd_mixer_selem_set_playback_volume(me, c, value);
+                                pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+                                pa_log_debug("Playback volume for element %s channel %i was below the dB fix limit. "
+                                             "Volume reset to %0.2f dB.", buf, c,
+                                             e->db_fix->db_values[value - e->db_fix->min_step] / 100.0);
+                            } else if (value > e->db_fix->max_step) {
+                                value = e->db_fix->max_step;
+                                snd_mixer_selem_set_playback_volume(me, c, value);
+                                pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+                                pa_log_debug("Playback volume for element %s channel %i was over the dB fix limit. "
+                                             "Volume reset to %0.2f dB.", buf, c,
+                                             e->db_fix->db_values[value - e->db_fix->min_step] / 100.0);
+                            }
+
+                            /* Volume step -> dB value conversion. */
+                            value = e->db_fix->db_values[value - e->db_fix->min_step];
+                        }
+                    } else
+                        r = snd_mixer_selem_get_playback_dB(me, c, &value);
+                } else
+                    r = -1;
+            } else {
+                if (snd_mixer_selem_has_capture_channel(me, c)) {
+                    if (e->db_fix) {
+                        if ((r = snd_mixer_selem_get_capture_volume(me, c, &value)) >= 0) {
+                            /* If the channel volume is outside the limits set
+                             * by the dB fix, we clamp the hw volume to be
+                             * within the limits. */
+                            if (value < e->db_fix->min_step) {
+                                value = e->db_fix->min_step;
+                                snd_mixer_selem_set_capture_volume(me, c, value);
+                                pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+                                pa_log_debug("Capture volume for element %s channel %i was below the dB fix limit. "
+                                             "Volume reset to %0.2f dB.", buf, c,
+                                             e->db_fix->db_values[value - e->db_fix->min_step] / 100.0);
+                            } else if (value > e->db_fix->max_step) {
+                                value = e->db_fix->max_step;
+                                snd_mixer_selem_set_capture_volume(me, c, value);
+                                pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+                                pa_log_debug("Capture volume for element %s channel %i was over the dB fix limit. "
+                                             "Volume reset to %0.2f dB.", buf, c,
+                                             e->db_fix->db_values[value - e->db_fix->min_step] / 100.0);
+                            }
+
+                            /* Volume step -> dB value conversion. */
+                            value = e->db_fix->db_values[value - e->db_fix->min_step];
+                        }
+                    } else
+                        r = snd_mixer_selem_get_capture_dB(me, c, &value);
+                } else
+                    r = -1;
+            }
+
+            if (r < 0)
+                continue;
+
+	    VALGRIND_MAKE_MEM_DEFINED(&value, sizeof(value));
+
+            f = from_alsa_dB(value);
+
+        } else {
+            long value = 0;
+
+            if (e->direction == PA_ALSA_DIRECTION_OUTPUT) {
+                if (snd_mixer_selem_has_playback_channel(me, c))
+                    r = snd_mixer_selem_get_playback_volume(me, c, &value);
+                else
+                    r = -1;
+            } else {
+                if (snd_mixer_selem_has_capture_channel(me, c))
+                    r = snd_mixer_selem_get_capture_volume(me, c, &value);
+                else
+                    r = -1;
+            }
+
+            if (r < 0)
+                continue;
+
+            f = from_alsa_volume(value, e->min_volume, e->max_volume);
+        }
+
+        for (k = 0; k < cm->channels; k++)
+            if (e->masks[c][e->n_channels-1] & PA_CHANNEL_POSITION_MASK(cm->map[k]))
+                if (v->values[k] < f)
+                    v->values[k] = f;
+
+        mask |= e->masks[c][e->n_channels-1];
+    }
+
+    for (k = 0; k < cm->channels; k++)
+        if (!(mask & PA_CHANNEL_POSITION_MASK(cm->map[k])))
+            v->values[k] = PA_VOLUME_NORM;
+
+    return 0;
+}
+
+int pa_alsa_path_get_volume(pa_alsa_path *p, snd_mixer_t *m, const pa_channel_map *cm, pa_cvolume *v) {
+    pa_alsa_element *e;
+
+    pa_assert(m);
+    pa_assert(p);
+    pa_assert(cm);
+    pa_assert(v);
+
+    if (!p->has_volume)
+        return -1;
+
+    pa_cvolume_reset(v, cm->channels);
+
+    PA_LLIST_FOREACH(e, p->elements) {
+        pa_cvolume ev;
+
+        if (e->volume_use != PA_ALSA_VOLUME_MERGE)
+            continue;
+
+        pa_assert(!p->has_dB || e->has_dB);
+
+        if (element_get_volume(e, m, cm, &ev) < 0)
+            return -1;
+
+        /* If we have no dB information all we can do is take the first element and leave */
+        if (!p->has_dB) {
+            *v = ev;
+            return 0;
+        }
+
+        pa_sw_cvolume_multiply(v, v, &ev);
+    }
+
+    return 0;
+}
+
+static int element_get_switch(pa_alsa_element *e, snd_mixer_t *m, bool *b) {
+    snd_mixer_selem_id_t *sid;
+    snd_mixer_elem_t *me;
+    snd_mixer_selem_channel_id_t c;
+    char buf[64];
+
+    pa_assert(m);
+    pa_assert(e);
+    pa_assert(b);
+
+    SELEM_INIT(sid, &e->alsa_id);
+    if (!(me = snd_mixer_find_selem(m, sid))) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log_warn("Element %s seems to have disappeared.", buf);
+        return -1;
+    }
+
+    /* We return muted if at least one channel is muted */
+
+    for (c = 0; c <= SND_MIXER_SCHN_LAST; c++) {
+        int r;
+        int value = 0;
+
+        if (e->direction == PA_ALSA_DIRECTION_OUTPUT) {
+            if (snd_mixer_selem_has_playback_channel(me, c))
+                r = snd_mixer_selem_get_playback_switch(me, c, &value);
+            else
+                r = -1;
+        } else {
+            if (snd_mixer_selem_has_capture_channel(me, c))
+                r = snd_mixer_selem_get_capture_switch(me, c, &value);
+            else
+                r = -1;
+        }
+
+        if (r < 0)
+            continue;
+
+        if (!value) {
+            *b = false;
+            return 0;
+        }
+    }
+
+    *b = true;
+    return 0;
+}
+
+int pa_alsa_path_get_mute(pa_alsa_path *p, snd_mixer_t *m, bool *muted) {
+    pa_alsa_element *e;
+
+    pa_assert(m);
+    pa_assert(p);
+    pa_assert(muted);
+
+    if (!p->has_mute)
+        return -1;
+
+    PA_LLIST_FOREACH(e, p->elements) {
+        bool b;
+
+        if (e->switch_use != PA_ALSA_SWITCH_MUTE)
+            continue;
+
+        if (element_get_switch(e, m, &b) < 0)
+            return -1;
+
+        if (!b) {
+            *muted = true;
+            return 0;
+        }
+    }
+
+    *muted = false;
+    return 0;
+}
+
+/* Finds the closest item in db_fix->db_values and returns the corresponding
+ * step. *db_value is replaced with the value from the db_values table.
+ * Rounding is done based on the rounding parameter: -1 means rounding down and
+ * +1 means rounding up. */
+static long decibel_fix_get_step(pa_alsa_decibel_fix *db_fix, long *db_value, int rounding) {
+    unsigned i = 0;
+    unsigned max_i = 0;
+
+    pa_assert(db_fix);
+    pa_assert(db_value);
+    pa_assert(rounding != 0);
+
+    max_i = db_fix->max_step - db_fix->min_step;
+
+    if (rounding > 0) {
+        for (i = 0; i < max_i; i++) {
+            if (db_fix->db_values[i] >= *db_value)
+                break;
+        }
+    } else {
+        for (i = 0; i < max_i; i++) {
+            if (db_fix->db_values[i + 1] > *db_value)
+                break;
+        }
+    }
+
+    *db_value = db_fix->db_values[i];
+
+    return i + db_fix->min_step;
+}
+
+/* Alsa lib documentation says for snd_mixer_selem_set_playback_dB() direction argument,
+ * that "-1 = accurate or first below, 0 = accurate, 1 = accurate or first above".
+ * But even with accurate nearest dB volume step is not selected, so that is why we need
+ * this function. Returns 0 and nearest selectable volume in *value_dB on success or
+ * negative error code if fails. */
+static int element_get_nearest_alsa_dB(snd_mixer_elem_t *me, snd_mixer_selem_channel_id_t c, pa_alsa_direction_t d, long *value_dB) {
+
+    long alsa_val;
+    long value_high;
+    long value_low;
+    int r = -1;
+
+    pa_assert(me);
+    pa_assert(value_dB);
+
+    if (d == PA_ALSA_DIRECTION_OUTPUT) {
+        if ((r = snd_mixer_selem_ask_playback_dB_vol(me, *value_dB, +1, &alsa_val)) >= 0)
+            r = snd_mixer_selem_ask_playback_vol_dB(me, alsa_val, &value_high);
+
+        if (r < 0)
+            return r;
+
+        if (value_high == *value_dB)
+            return r;
+
+        if ((r = snd_mixer_selem_ask_playback_dB_vol(me, *value_dB, -1, &alsa_val)) >= 0)
+            r = snd_mixer_selem_ask_playback_vol_dB(me, alsa_val, &value_low);
+    } else {
+        if ((r = snd_mixer_selem_ask_capture_dB_vol(me, *value_dB, +1, &alsa_val)) >= 0)
+            r = snd_mixer_selem_ask_capture_vol_dB(me, alsa_val, &value_high);
+
+        if (r < 0)
+            return r;
+
+        if (value_high == *value_dB)
+            return r;
+
+        if ((r = snd_mixer_selem_ask_capture_dB_vol(me, *value_dB, -1, &alsa_val)) >= 0)
+            r = snd_mixer_selem_ask_capture_vol_dB(me, alsa_val, &value_low);
+    }
+
+    if (r < 0)
+        return r;
+
+    if (labs(value_high - *value_dB) < labs(value_low - *value_dB))
+        *value_dB = value_high;
+    else
+        *value_dB = value_low;
+
+    return r;
+}
+
+static int element_set_volume(pa_alsa_element *e, snd_mixer_t *m, const pa_channel_map *cm, pa_cvolume *v, bool deferred_volume, bool write_to_hw) {
+
+    snd_mixer_selem_id_t *sid;
+    pa_cvolume rv;
+    snd_mixer_elem_t *me;
+    snd_mixer_selem_channel_id_t c;
+    pa_channel_position_mask_t mask = 0;
+    char buf[64];
+    unsigned k;
+
+    pa_assert(m);
+    pa_assert(e);
+    pa_assert(cm);
+    pa_assert(v);
+    pa_assert(pa_cvolume_compatible_with_channel_map(v, cm));
+
+    SELEM_INIT(sid, &e->alsa_id);
+    if (!(me = snd_mixer_find_selem(m, sid))) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log_warn("Element %s seems to have disappeared.", buf);
+        return -1;
+    }
+
+    pa_cvolume_mute(&rv, cm->channels);
+
+    for (c = 0; c <= SND_MIXER_SCHN_LAST; c++) {
+        int r;
+        pa_volume_t f = PA_VOLUME_MUTED;
+        bool found = false;
+
+        for (k = 0; k < cm->channels; k++)
+            if (e->masks[c][e->n_channels-1] & PA_CHANNEL_POSITION_MASK(cm->map[k])) {
+                found = true;
+                if (v->values[k] > f)
+                    f = v->values[k];
+            }
+
+        if (!found) {
+            /* Hmm, so this channel does not exist in the volume
+             * struct, so let's bind it to the overall max of the
+             * volume. */
+            f = pa_cvolume_max(v);
+        }
+
+        if (e->has_dB) {
+            long value = to_alsa_dB(f);
+            int rounding;
+
+            if (e->volume_limit >= 0 && value > (e->max_dB * 100))
+                value = e->max_dB * 100;
+
+            if (e->direction == PA_ALSA_DIRECTION_OUTPUT) {
+                /* If we call set_playback_volume() without checking first
+                 * if the channel is available, ALSA behaves very
+                 * strangely and doesn't fail the call */
+                if (snd_mixer_selem_has_playback_channel(me, c)) {
+                    rounding = +1;
+                    if (e->db_fix) {
+                        if (write_to_hw)
+                            r = snd_mixer_selem_set_playback_volume(me, c, decibel_fix_get_step(e->db_fix, &value, rounding));
+                        else {
+                            decibel_fix_get_step(e->db_fix, &value, rounding);
+                            r = 0;
+                        }
+
+                    } else {
+                        if (write_to_hw) {
+                            if (deferred_volume) {
+                                if ((r = element_get_nearest_alsa_dB(me, c, PA_ALSA_DIRECTION_OUTPUT, &value)) >= 0)
+                                    r = snd_mixer_selem_set_playback_dB(me, c, value, 0);
+                            } else {
+                                if ((r = snd_mixer_selem_set_playback_dB(me, c, value, rounding)) >= 0)
+                                    r = snd_mixer_selem_get_playback_dB(me, c, &value);
+                           }
+                        } else {
+                            long alsa_val;
+                            if ((r = snd_mixer_selem_ask_playback_dB_vol(me, value, rounding, &alsa_val)) >= 0)
+                                r = snd_mixer_selem_ask_playback_vol_dB(me, alsa_val, &value);
+                        }
+                    }
+                } else
+                    r = -1;
+            } else {
+                if (snd_mixer_selem_has_capture_channel(me, c)) {
+                    rounding = -1;
+                    if (e->db_fix) {
+                        if (write_to_hw)
+                            r = snd_mixer_selem_set_capture_volume(me, c, decibel_fix_get_step(e->db_fix, &value, rounding));
+                        else {
+                            decibel_fix_get_step(e->db_fix, &value, rounding);
+                            r = 0;
+                        }
+
+                    } else {
+                        if (write_to_hw) {
+                            if (deferred_volume) {
+                                if ((r = element_get_nearest_alsa_dB(me, c, PA_ALSA_DIRECTION_INPUT, &value)) >= 0)
+                                    r = snd_mixer_selem_set_capture_dB(me, c, value, 0);
+                            } else {
+                                if ((r = snd_mixer_selem_set_capture_dB(me, c, value, rounding)) >= 0)
+                                    r = snd_mixer_selem_get_capture_dB(me, c, &value);
+                            }
+                        } else {
+                            long alsa_val;
+                            if ((r = snd_mixer_selem_ask_capture_dB_vol(me, value, rounding, &alsa_val)) >= 0)
+                                r = snd_mixer_selem_ask_capture_vol_dB(me, alsa_val, &value);
+                        }
+                    }
+                } else
+                    r = -1;
+            }
+
+            if (r < 0)
+                continue;
+
+            f = from_alsa_dB(value);
+
+        } else {
+            long value;
+
+            value = to_alsa_volume(f, e->min_volume, e->max_volume);
+
+            if (e->direction == PA_ALSA_DIRECTION_OUTPUT) {
+                if (snd_mixer_selem_has_playback_channel(me, c)) {
+                    if ((r = snd_mixer_selem_set_playback_volume(me, c, value)) >= 0)
+                        r = snd_mixer_selem_get_playback_volume(me, c, &value);
+                } else
+                    r = -1;
+            } else {
+                if (snd_mixer_selem_has_capture_channel(me, c)) {
+                    if ((r = snd_mixer_selem_set_capture_volume(me, c, value)) >= 0)
+                        r = snd_mixer_selem_get_capture_volume(me, c, &value);
+                } else
+                    r = -1;
+            }
+
+            if (r < 0)
+                continue;
+
+            f = from_alsa_volume(value, e->min_volume, e->max_volume);
+        }
+
+        for (k = 0; k < cm->channels; k++)
+            if (e->masks[c][e->n_channels-1] & PA_CHANNEL_POSITION_MASK(cm->map[k]))
+                if (rv.values[k] < f)
+                    rv.values[k] = f;
+
+        mask |= e->masks[c][e->n_channels-1];
+    }
+
+    for (k = 0; k < cm->channels; k++)
+        if (!(mask & PA_CHANNEL_POSITION_MASK(cm->map[k])))
+            rv.values[k] = PA_VOLUME_NORM;
+
+    *v = rv;
+    return 0;
+}
+
+int pa_alsa_path_set_volume(pa_alsa_path *p, snd_mixer_t *m, const pa_channel_map *cm, pa_cvolume *v, bool deferred_volume, bool write_to_hw) {
+
+    pa_alsa_element *e;
+    pa_cvolume rv;
+
+    pa_assert(m);
+    pa_assert(p);
+    pa_assert(cm);
+    pa_assert(v);
+    pa_assert(pa_cvolume_compatible_with_channel_map(v, cm));
+
+    if (!p->has_volume)
+        return -1;
+
+    rv = *v; /* Remaining adjustment */
+    pa_cvolume_reset(v, cm->channels); /* Adjustment done */
+
+    PA_LLIST_FOREACH(e, p->elements) {
+        pa_cvolume ev;
+
+        if (e->volume_use != PA_ALSA_VOLUME_MERGE)
+            continue;
+
+        pa_assert(!p->has_dB || e->has_dB);
+
+        ev = rv;
+        if (element_set_volume(e, m, cm, &ev, deferred_volume, write_to_hw) < 0)
+            return -1;
+
+        if (!p->has_dB) {
+            *v = ev;
+            return 0;
+        }
+
+        pa_sw_cvolume_multiply(v, v, &ev);
+        pa_sw_cvolume_divide(&rv, &rv, &ev);
+    }
+
+    return 0;
+}
+
+static int element_set_switch(pa_alsa_element *e, snd_mixer_t *m, bool b) {
+    snd_mixer_elem_t *me;
+    snd_mixer_selem_id_t *sid;
+    char buf[64];
+    int r;
+
+    pa_assert(m);
+    pa_assert(e);
+
+    SELEM_INIT(sid, &e->alsa_id);
+    if (!(me = snd_mixer_find_selem(m, sid))) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log_warn("Element %s seems to have disappeared.", buf);
+        return -1;
+    }
+
+    if (e->direction == PA_ALSA_DIRECTION_OUTPUT)
+        r = snd_mixer_selem_set_playback_switch_all(me, b);
+    else
+        r = snd_mixer_selem_set_capture_switch_all(me, b);
+
+    if (r < 0) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log_warn("Failed to set switch of %s: %s", buf, pa_alsa_strerror(errno));
+    }
+
+    return r;
+}
+
+int pa_alsa_path_set_mute(pa_alsa_path *p, snd_mixer_t *m, bool muted) {
+    pa_alsa_element *e;
+
+    pa_assert(m);
+    pa_assert(p);
+
+    if (!p->has_mute)
+        return -1;
+
+    PA_LLIST_FOREACH(e, p->elements) {
+
+        if (e->switch_use != PA_ALSA_SWITCH_MUTE)
+            continue;
+
+        if (element_set_switch(e, m, !muted) < 0)
+            return -1;
+    }
+
+    return 0;
+}
+
+/* Depending on whether e->volume_use is _OFF, _ZERO or _CONSTANT, this
+ * function sets all channels of the volume element to e->min_volume, 0 dB or
+ * e->constant_volume. */
+static int element_set_constant_volume(pa_alsa_element *e, snd_mixer_t *m) {
+    snd_mixer_elem_t *me = NULL;
+    snd_mixer_selem_id_t *sid = NULL;
+    int r = 0;
+    long volume = -1;
+    bool volume_set = false;
+    char buf[64];
+
+    pa_assert(m);
+    pa_assert(e);
+
+    SELEM_INIT(sid, &e->alsa_id);
+    if (!(me = snd_mixer_find_selem(m, sid))) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log_warn("Element %s seems to have disappeared.", buf);
+        return -1;
+    }
+
+    switch (e->volume_use) {
+        case PA_ALSA_VOLUME_OFF:
+            volume = e->min_volume;
+            volume_set = true;
+            break;
+
+        case PA_ALSA_VOLUME_ZERO:
+            if (e->db_fix) {
+                long dB = 0;
+
+                volume = decibel_fix_get_step(e->db_fix, &dB, (e->direction == PA_ALSA_DIRECTION_OUTPUT ? +1 : -1));
+                volume_set = true;
+            }
+            break;
+
+        case PA_ALSA_VOLUME_CONSTANT:
+            volume = e->constant_volume;
+            volume_set = true;
+            break;
+
+        default:
+            pa_assert_not_reached();
+    }
+
+    if (volume_set) {
+        if (e->direction == PA_ALSA_DIRECTION_OUTPUT)
+            r = snd_mixer_selem_set_playback_volume_all(me, volume);
+        else
+            r = snd_mixer_selem_set_capture_volume_all(me, volume);
+    } else {
+        pa_assert(e->volume_use == PA_ALSA_VOLUME_ZERO);
+        pa_assert(!e->db_fix);
+
+        if (e->direction == PA_ALSA_DIRECTION_OUTPUT)
+            r = snd_mixer_selem_set_playback_dB_all(me, 0, +1);
+        else
+            r = snd_mixer_selem_set_capture_dB_all(me, 0, -1);
+    }
+
+    if (r < 0) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log_warn("Failed to set volume of %s: %s", buf, pa_alsa_strerror(errno));
+    }
+
+    return r;
+}
+
+int pa_alsa_path_select(pa_alsa_path *p, pa_alsa_setting *s, snd_mixer_t *m, bool device_is_muted) {
+    pa_alsa_element *e;
+    int r = 0;
+
+    pa_assert(m);
+    pa_assert(p);
+
+    pa_log_info("Activating path %s", p->name);
+    pa_alsa_path_dump(p);
+
+    /* First turn on hw mute if available, to avoid noise
+     * when setting the mixer controls. */
+    if (p->mute_during_activation) {
+        PA_LLIST_FOREACH(e, p->elements) {
+            if (e->switch_use == PA_ALSA_SWITCH_MUTE)
+                /* If the muting fails here, that's not a critical problem for
+                 * selecting a path, so we ignore the return value.
+                 * element_set_switch() will print a warning anyway, so this
+                 * won't be a silent failure either. */
+                (void) element_set_switch(e, m, false);
+        }
+    }
+
+    PA_LLIST_FOREACH(e, p->elements) {
+
+        switch (e->switch_use) {
+            case PA_ALSA_SWITCH_OFF:
+                r = element_set_switch(e, m, false);
+                break;
+
+            case PA_ALSA_SWITCH_ON:
+                r = element_set_switch(e, m, true);
+                break;
+
+            case PA_ALSA_SWITCH_MUTE:
+            case PA_ALSA_SWITCH_IGNORE:
+            case PA_ALSA_SWITCH_SELECT:
+                r = 0;
+                break;
+        }
+
+        if (r < 0)
+            return -1;
+
+        switch (e->volume_use) {
+            case PA_ALSA_VOLUME_OFF:
+            case PA_ALSA_VOLUME_ZERO:
+            case PA_ALSA_VOLUME_CONSTANT:
+                r = element_set_constant_volume(e, m);
+                break;
+
+            case PA_ALSA_VOLUME_MERGE:
+            case PA_ALSA_VOLUME_IGNORE:
+                r = 0;
+                break;
+        }
+
+        if (r < 0)
+            return -1;
+    }
+
+    if (s)
+        setting_select(s, m);
+
+    /* Finally restore hw mute to the device mute status. */
+    if (p->mute_during_activation) {
+        PA_LLIST_FOREACH(e, p->elements) {
+            if (e->switch_use == PA_ALSA_SWITCH_MUTE) {
+                if (element_set_switch(e, m, !device_is_muted) < 0)
+                    return -1;
+            }
+        }
+    }
+
+    return 0;
+}
+
+static int check_required(pa_alsa_element *e, snd_mixer_elem_t *me) {
+    bool has_switch;
+    bool has_enumeration;
+    bool has_volume;
+
+    pa_assert(e);
+    pa_assert(me);
+
+    if (e->direction == PA_ALSA_DIRECTION_OUTPUT) {
+        has_switch =
+            snd_mixer_selem_has_playback_switch(me) ||
+            (e->direction_try_other && snd_mixer_selem_has_capture_switch(me));
+    } else {
+        has_switch =
+            snd_mixer_selem_has_capture_switch(me) ||
+            (e->direction_try_other && snd_mixer_selem_has_playback_switch(me));
+    }
+
+    if (e->direction == PA_ALSA_DIRECTION_OUTPUT) {
+        has_volume =
+            snd_mixer_selem_has_playback_volume(me) ||
+            (e->direction_try_other && snd_mixer_selem_has_capture_volume(me));
+    } else {
+        has_volume =
+            snd_mixer_selem_has_capture_volume(me) ||
+            (e->direction_try_other && snd_mixer_selem_has_playback_volume(me));
+    }
+
+    has_enumeration = snd_mixer_selem_is_enumerated(me);
+
+    if ((e->required == PA_ALSA_REQUIRED_SWITCH && !has_switch) ||
+        (e->required == PA_ALSA_REQUIRED_VOLUME && !has_volume) ||
+        (e->required == PA_ALSA_REQUIRED_ENUMERATION && !has_enumeration))
+        return -1;
+
+    if (e->required == PA_ALSA_REQUIRED_ANY && !(has_switch || has_volume || has_enumeration))
+        return -1;
+
+    if ((e->required_absent == PA_ALSA_REQUIRED_SWITCH && has_switch) ||
+        (e->required_absent == PA_ALSA_REQUIRED_VOLUME && has_volume) ||
+        (e->required_absent == PA_ALSA_REQUIRED_ENUMERATION && has_enumeration))
+        return -1;
+
+    if (e->required_absent == PA_ALSA_REQUIRED_ANY && (has_switch || has_volume || has_enumeration))
+        return -1;
+
+    if (e->required_any != PA_ALSA_REQUIRED_IGNORE) {
+        switch (e->required_any) {
+            case PA_ALSA_REQUIRED_VOLUME:
+                e->path->req_any_present |= (e->volume_use != PA_ALSA_VOLUME_IGNORE);
+                break;
+            case PA_ALSA_REQUIRED_SWITCH:
+                e->path->req_any_present |= (e->switch_use != PA_ALSA_SWITCH_IGNORE);
+                break;
+            case PA_ALSA_REQUIRED_ENUMERATION:
+                e->path->req_any_present |= (e->enumeration_use != PA_ALSA_ENUMERATION_IGNORE);
+                break;
+            case PA_ALSA_REQUIRED_ANY:
+                e->path->req_any_present |=
+                    (e->volume_use != PA_ALSA_VOLUME_IGNORE) ||
+                    (e->switch_use != PA_ALSA_SWITCH_IGNORE) ||
+                    (e->enumeration_use != PA_ALSA_ENUMERATION_IGNORE);
+                break;
+            default:
+                pa_assert_not_reached();
+        }
+    }
+
+    if (e->enumeration_use == PA_ALSA_ENUMERATION_SELECT) {
+        pa_alsa_option *o;
+        PA_LLIST_FOREACH(o, e->options) {
+            e->path->req_any_present |= (o->required_any != PA_ALSA_REQUIRED_IGNORE) &&
+                (o->alsa_idx >= 0);
+            if (o->required != PA_ALSA_REQUIRED_IGNORE && o->alsa_idx < 0)
+                return -1;
+            if (o->required_absent != PA_ALSA_REQUIRED_IGNORE && o->alsa_idx >= 0)
+                return -1;
+        }
+    }
+
+    return 0;
+}
+
+static int element_ask_vol_dB(snd_mixer_elem_t *me, pa_alsa_direction_t dir, long value, long *dBvalue) {
+    if (dir == PA_ALSA_DIRECTION_OUTPUT)
+        return snd_mixer_selem_ask_playback_vol_dB(me, value, dBvalue);
+    else
+        return snd_mixer_selem_ask_capture_vol_dB(me, value, dBvalue);
+}
+
+static bool element_probe_volume(pa_alsa_element *e, snd_mixer_elem_t *me) {
+
+    long min_dB = 0, max_dB = 0;
+    int r;
+    bool is_mono;
+    pa_channel_position_t p;
+    char buf[64];
+
+    if (e->direction == PA_ALSA_DIRECTION_OUTPUT) {
+        if (!snd_mixer_selem_has_playback_volume(me)) {
+            if (e->direction_try_other && snd_mixer_selem_has_capture_volume(me))
+                e->direction = PA_ALSA_DIRECTION_INPUT;
+            else
+                return false;
+        }
+    } else {
+        if (!snd_mixer_selem_has_capture_volume(me)) {
+            if (e->direction_try_other && snd_mixer_selem_has_playback_volume(me))
+                e->direction = PA_ALSA_DIRECTION_OUTPUT;
+            else
+                return false;
+        }
+    }
+
+    e->direction_try_other = false;
+
+    if (e->direction == PA_ALSA_DIRECTION_OUTPUT)
+        r = snd_mixer_selem_get_playback_volume_range(me, &e->min_volume, &e->max_volume);
+    else
+        r = snd_mixer_selem_get_capture_volume_range(me, &e->min_volume, &e->max_volume);
+
+    if (r < 0) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log_warn("Failed to get volume range of %s: %s", buf, pa_alsa_strerror(r));
+        return false;
+    }
+
+    if (e->min_volume >= e->max_volume) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log_warn("Your kernel driver is broken for element %s: it reports a volume range from %li to %li which makes no sense.",
+                    buf, e->min_volume, e->max_volume);
+        return false;
+    }
+    if (e->volume_use == PA_ALSA_VOLUME_CONSTANT && (e->min_volume > e->constant_volume || e->max_volume < e->constant_volume)) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log_warn("Constant volume %li configured for element %s, but the available range is from %li to %li.",
+                    e->constant_volume, buf, e->min_volume, e->max_volume);
+        return false;
+    }
+
+
+    if (e->db_fix && ((e->min_volume > e->db_fix->min_step) || (e->max_volume < e->db_fix->max_step))) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log_warn("The step range of the decibel fix for element %s (%li-%li) doesn't fit to the "
+                    "real hardware range (%li-%li). Disabling the decibel fix.", buf,
+                    e->db_fix->min_step, e->db_fix->max_step, e->min_volume, e->max_volume);
+
+        decibel_fix_free(e->db_fix);
+        e->db_fix = NULL;
+    }
+
+    if (e->db_fix) {
+        e->has_dB = true;
+        e->min_volume = e->db_fix->min_step;
+        e->max_volume = e->db_fix->max_step;
+        min_dB = e->db_fix->db_values[0];
+        max_dB = e->db_fix->db_values[e->db_fix->max_step - e->db_fix->min_step];
+    } else if (e->direction == PA_ALSA_DIRECTION_OUTPUT)
+        e->has_dB = snd_mixer_selem_get_playback_dB_range(me, &min_dB, &max_dB) >= 0;
+    else
+        e->has_dB = snd_mixer_selem_get_capture_dB_range(me, &min_dB, &max_dB) >= 0;
+
+    /* Assume decibel data to be incorrect if max_dB is negative. */
+    if (e->has_dB && max_dB < 0 && !e->db_fix) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log_warn("The decibel volume range for element %s (%li dB - %li dB) has negative maximum. "
+                    "Disabling the decibel range.", buf, min_dB, max_dB);
+        e->has_dB = false;
+    }
+
+    /* Check that the kernel driver returns consistent limits with
+     * both _get_*_dB_range() and _ask_*_vol_dB(). */
+    if (e->has_dB && !e->db_fix) {
+        long min_dB_checked = 0;
+        long max_dB_checked = 0;
+
+        if (element_ask_vol_dB(me, e->direction, e->min_volume, &min_dB_checked) < 0) {
+            pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+            pa_log_warn("Failed to query the dB value for %s at volume level %li", buf, e->min_volume);
+            return false;
+        }
+
+        if (element_ask_vol_dB(me, e->direction, e->max_volume, &max_dB_checked) < 0) {
+            pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+            pa_log_warn("Failed to query the dB value for %s at volume level %li", buf, e->max_volume);
+            return false;
+        }
+
+        if (min_dB != min_dB_checked || max_dB != max_dB_checked) {
+            pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+            pa_log_warn("Your kernel driver is broken: the reported dB range for %s (from %0.2f dB to %0.2f dB) "
+                        "doesn't match the dB values at minimum and maximum volume levels: %0.2f dB at level %li, "
+                        "%0.2f dB at level %li.", buf, min_dB / 100.0, max_dB / 100.0,
+                        min_dB_checked / 100.0, e->min_volume, max_dB_checked / 100.0, e->max_volume);
+            return false;
+        }
+    }
+
+    if (e->has_dB) {
+        e->min_dB = ((double) min_dB) / 100.0;
+        e->max_dB = ((double) max_dB) / 100.0;
+
+        if (min_dB >= max_dB) {
+            pa_assert(!e->db_fix);
+            pa_log_warn("Your kernel driver is broken: it reports a volume range from %0.2f dB to %0.2f dB which makes no sense.",
+                        e->min_dB, e->max_dB);
+            e->has_dB = false;
+        }
+    }
+
+    if (e->volume_limit >= 0) {
+        if (e->volume_limit <= e->min_volume || e->volume_limit > e->max_volume) {
+            pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+            pa_log_warn("Volume limit for element %s of path %s is invalid: %li isn't within the valid range "
+                        "%li-%li. The volume limit is ignored.",
+                        buf, e->path->name, e->volume_limit, e->min_volume + 1, e->max_volume);
+        } else {
+            e->max_volume = e->volume_limit;
+
+            if (e->has_dB) {
+                if (e->db_fix) {
+                    e->db_fix->max_step = e->max_volume;
+                    e->max_dB = ((double) e->db_fix->db_values[e->db_fix->max_step - e->db_fix->min_step]) / 100.0;
+                } else if (element_ask_vol_dB(me, e->direction, e->max_volume, &max_dB) < 0) {
+                    pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+                    pa_log_warn("Failed to get dB value of %s: %s", buf, pa_alsa_strerror(r));
+                    e->has_dB = false;
+                } else
+                    e->max_dB = ((double) max_dB) / 100.0;
+            }
+        }
+    }
+
+    if (e->direction == PA_ALSA_DIRECTION_OUTPUT)
+        is_mono = snd_mixer_selem_is_playback_mono(me) > 0;
+    else
+        is_mono = snd_mixer_selem_is_capture_mono(me) > 0;
+
+    if (is_mono) {
+        e->n_channels = 1;
+
+        if ((e->override_map & (1 << (e->n_channels-1))) && e->masks[SND_MIXER_SCHN_MONO][e->n_channels-1] == 0) {
+            pa_log_warn("Override map for mono element %s is invalid, ignoring override map", e->path->name);
+            e->override_map &= ~(1 << (e->n_channels-1));
+        }
+        if (!(e->override_map & (1 << (e->n_channels-1)))) {
+            for (p = PA_CHANNEL_POSITION_FRONT_LEFT; p < PA_CHANNEL_POSITION_MAX; p++) {
+                if (alsa_channel_ids[p] == SND_MIXER_SCHN_UNKNOWN)
+                    continue;
+                e->masks[alsa_channel_ids[p]][e->n_channels-1] = 0;
+            }
+            e->masks[SND_MIXER_SCHN_MONO][e->n_channels-1] = PA_CHANNEL_POSITION_MASK_ALL;
+        }
+        e->merged_mask = e->masks[SND_MIXER_SCHN_MONO][e->n_channels-1];
+        return true;
+    }
+
+    e->n_channels = 0;
+    for (p = PA_CHANNEL_POSITION_FRONT_LEFT; p < PA_CHANNEL_POSITION_MAX; p++) {
+        if (alsa_channel_ids[p] == SND_MIXER_SCHN_UNKNOWN)
+            continue;
+
+        if (e->direction == PA_ALSA_DIRECTION_OUTPUT)
+            e->n_channels += snd_mixer_selem_has_playback_channel(me, alsa_channel_ids[p]) > 0;
+        else
+            e->n_channels += snd_mixer_selem_has_capture_channel(me, alsa_channel_ids[p]) > 0;
+    }
+
+    if (e->n_channels <= 0) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log_warn("Volume element %s with no channels?", buf);
+        return false;
+    } else if (e->n_channels > POSITION_MASK_CHANNELS) {
+        /* FIXME: In some places code like this is used:
+         *
+         *     e->masks[alsa_channel_ids[p]][e->n_channels-1]
+         *
+         * The definition of e->masks is
+         *
+         *     pa_channel_position_mask_t masks[SND_MIXER_SCHN_LAST + 1][POSITION_MASK_CHANNELS];
+         *
+         * Since the array size is fixed at POSITION_MASK_CHANNELS, we obviously
+         * don't support elements with more than POSITION_MASK_CHANNELS
+         * channels... */
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log_warn("Volume element %s has %u channels. That's too much! I can't handle that!", buf, e->n_channels);
+        return false;
+    }
+
+retry:
+    if (!(e->override_map & (1 << (e->n_channels-1)))) {
+        for (p = PA_CHANNEL_POSITION_FRONT_LEFT; p < PA_CHANNEL_POSITION_MAX; p++) {
+            bool has_channel;
+
+            if (alsa_channel_ids[p] == SND_MIXER_SCHN_UNKNOWN)
+                continue;
+
+            if (e->direction == PA_ALSA_DIRECTION_OUTPUT)
+                has_channel = snd_mixer_selem_has_playback_channel(me, alsa_channel_ids[p]) > 0;
+            else
+                has_channel = snd_mixer_selem_has_capture_channel(me, alsa_channel_ids[p]) > 0;
+
+            e->masks[alsa_channel_ids[p]][e->n_channels-1] = has_channel ? PA_CHANNEL_POSITION_MASK(p) : 0;
+        }
+    }
+
+    e->merged_mask = 0;
+    for (p = PA_CHANNEL_POSITION_FRONT_LEFT; p < PA_CHANNEL_POSITION_MAX; p++) {
+        if (alsa_channel_ids[p] == SND_MIXER_SCHN_UNKNOWN)
+            continue;
+
+        e->merged_mask |= e->masks[alsa_channel_ids[p]][e->n_channels-1];
+    }
+
+    if (e->merged_mask == 0) {
+        if (!(e->override_map & (1 << (e->n_channels-1)))) {
+            pa_log_warn("Channel map for element %s is invalid", e->path->name);
+            return false;
+        }
+        pa_log_warn("Override map for element %s has empty result, ignoring override map", e->path->name);
+        e->override_map &= ~(1 << (e->n_channels-1));
+        goto retry;
+    }
+
+    return true;
+}
+
+static int element_probe(pa_alsa_element *e, snd_mixer_t *m) {
+    snd_mixer_selem_id_t *sid;
+    snd_mixer_elem_t *me;
+
+    pa_assert(m);
+    pa_assert(e);
+    pa_assert(e->path);
+
+    SELEM_INIT(sid, &e->alsa_id);
+
+    if (!(me = snd_mixer_find_selem(m, sid))) {
+
+        if (e->required != PA_ALSA_REQUIRED_IGNORE)
+            return -1;
+
+        e->switch_use = PA_ALSA_SWITCH_IGNORE;
+        e->volume_use = PA_ALSA_VOLUME_IGNORE;
+        e->enumeration_use = PA_ALSA_ENUMERATION_IGNORE;
+
+        return 0;
+    }
+
+    if (e->switch_use != PA_ALSA_SWITCH_IGNORE) {
+        if (e->direction == PA_ALSA_DIRECTION_OUTPUT) {
+
+            if (!snd_mixer_selem_has_playback_switch(me)) {
+                if (e->direction_try_other && snd_mixer_selem_has_capture_switch(me))
+                    e->direction = PA_ALSA_DIRECTION_INPUT;
+                else
+                    e->switch_use = PA_ALSA_SWITCH_IGNORE;
+            }
+
+        } else {
+
+            if (!snd_mixer_selem_has_capture_switch(me)) {
+                if (e->direction_try_other && snd_mixer_selem_has_playback_switch(me))
+                    e->direction = PA_ALSA_DIRECTION_OUTPUT;
+                else
+                    e->switch_use = PA_ALSA_SWITCH_IGNORE;
+            }
+        }
+
+        if (e->switch_use != PA_ALSA_SWITCH_IGNORE)
+            e->direction_try_other = false;
+    }
+
+    if (!element_probe_volume(e, me))
+        e->volume_use = PA_ALSA_VOLUME_IGNORE;
+
+    if (e->switch_use == PA_ALSA_SWITCH_SELECT) {
+        pa_alsa_option *o;
+
+        PA_LLIST_FOREACH(o, e->options)
+            o->alsa_idx = pa_streq(o->alsa_name, "on") ? 1 : 0;
+    } else if (e->enumeration_use == PA_ALSA_ENUMERATION_SELECT) {
+        int n;
+        pa_alsa_option *o;
+
+        if ((n = snd_mixer_selem_get_enum_items(me)) < 0) {
+            pa_log("snd_mixer_selem_get_enum_items() failed: %s", pa_alsa_strerror(n));
+            return -1;
+        }
+
+        PA_LLIST_FOREACH(o, e->options) {
+            int i;
+
+            for (i = 0; i < n; i++) {
+                char buf[128];
+
+                if (snd_mixer_selem_get_enum_item_name(me, i, sizeof(buf), buf) < 0)
+                    continue;
+
+                if (!pa_streq(buf, o->alsa_name))
+                    continue;
+
+                o->alsa_idx = i;
+            }
+        }
+    }
+
+    if (check_required(e, me) < 0)
+        return -1;
+
+    return 0;
+}
+
+static int jack_probe(pa_alsa_jack *j, pa_alsa_mapping *mapping, snd_mixer_t *m) {
+    bool has_control;
+
+    pa_assert(j);
+    pa_assert(j->path);
+
+    if (j->append_pcm_to_name) {
+        char *new_name;
+
+        if (!mapping) {
+            /* This could also be an assertion, because this should never
+             * happen. At the time of writing, mapping can only be NULL when
+             * module-alsa-sink/source synthesizes a path, and those
+             * synthesized paths never have any jacks, so jack_probe() should
+             * never be called with a NULL mapping. */
+            pa_log("Jack %s: append_pcm_to_name is set, but mapping is NULL. Can't use this jack.", j->name);
+            return -1;
+        }
+
+        new_name = pa_sprintf_malloc("%s,pcm=%i Jack", j->name, mapping->hw_device_index);
+        pa_xfree(j->alsa_id.name);
+        j->alsa_id.name = new_name;
+        j->append_pcm_to_name = false;
+    }
+
+    has_control = pa_alsa_mixer_find_card(m, &j->alsa_id, 0) != NULL;
+    pa_alsa_jack_set_has_control(j, has_control);
+
+    if (j->has_control) {
+        if (j->required_absent != PA_ALSA_REQUIRED_IGNORE)
+            return -1;
+        if (j->required_any != PA_ALSA_REQUIRED_IGNORE)
+            j->path->req_any_present = true;
+    } else {
+        if (j->required != PA_ALSA_REQUIRED_IGNORE)
+            return -1;
+    }
+
+    return 0;
+}
+
+pa_alsa_element * pa_alsa_element_get(pa_alsa_path *p, const char *section, bool prefixed) {
+    pa_alsa_element *e;
+    char *name;
+    int index;
+
+    pa_assert(p);
+    pa_assert(section);
+
+    if (prefixed) {
+        if (!pa_startswith(section, "Element "))
+            return NULL;
+
+        section += 8;
+    }
+
+    /* This is not an element section, but an enum section? */
+    if (strchr(section, ':'))
+        return NULL;
+
+    name = alloca(strlen(section) + 1);
+    if (alsa_id_decode(section, name, &index))
+        return NULL;
+
+    if (p->last_element && pa_streq(p->last_element->alsa_id.name, name) &&
+        p->last_element->alsa_id.index == index)
+        return p->last_element;
+
+    PA_LLIST_FOREACH(e, p->elements)
+        if (pa_streq(e->alsa_id.name, name) && e->alsa_id.index == index)
+            goto finish;
+
+    e = pa_xnew0(pa_alsa_element, 1);
+    e->path = p;
+    e->alsa_id.name = pa_xstrdup(name);
+    e->alsa_id.index = index;
+    e->direction = p->direction;
+    e->volume_limit = -1;
+
+    PA_LLIST_INSERT_AFTER(pa_alsa_element, p->elements, p->last_element, e);
+
+finish:
+    p->last_element = e;
+    return e;
+}
+
+static pa_alsa_jack* jack_get(pa_alsa_path *p, const char *section) {
+    pa_alsa_jack *j;
+    char *name;
+    int index;
+
+    if (!pa_startswith(section, "Jack "))
+        return NULL;
+    section += 5;
+
+    name = alloca(strlen(section) + 1);
+    if (alsa_id_decode(section, name, &index))
+        return NULL;
+
+    if (p->last_jack && pa_streq(p->last_jack->name, name) &&
+        p->last_jack->alsa_id.index == index)
+        return p->last_jack;
+
+    PA_LLIST_FOREACH(j, p->jacks)
+        if (pa_streq(j->name, name) && j->alsa_id.index == index)
+            goto finish;
+
+    j = pa_alsa_jack_new(p, NULL, name, index);
+    PA_LLIST_INSERT_AFTER(pa_alsa_jack, p->jacks, p->last_jack, j);
+
+finish:
+    p->last_jack = j;
+    return j;
+}
+
+static pa_alsa_option* option_get(pa_alsa_path *p, const char *section) {
+    char *en, *name;
+    const char *on;
+    pa_alsa_option *o;
+    pa_alsa_element *e;
+    size_t len;
+    int index;
+
+    if (!pa_startswith(section, "Option "))
+        return NULL;
+
+    section += 7;
+
+    /* This is not an enum section, but an element section? */
+    if (!(on = strchr(section, ':')))
+        return NULL;
+
+    len = on - section;
+    en = alloca(len + 1);
+    strncpy(en, section, len);
+    en[len] = '\0';
+
+    name = alloca(strlen(en) + 1);
+    if (alsa_id_decode(en, name, &index))
+        return NULL;
+
+    on++;
+
+    if (p->last_option &&
+        pa_streq(p->last_option->element->alsa_id.name, name) &&
+        p->last_option->element->alsa_id.index == index &&
+        pa_streq(p->last_option->alsa_name, on)) {
+        return p->last_option;
+    }
+
+    pa_assert_se(e = pa_alsa_element_get(p, en, false));
+
+    PA_LLIST_FOREACH(o, e->options)
+        if (pa_streq(o->alsa_name, on))
+            goto finish;
+
+    o = pa_xnew0(pa_alsa_option, 1);
+    o->element = e;
+    o->alsa_name = pa_xstrdup(on);
+    o->alsa_idx = -1;
+
+    if (p->last_option && p->last_option->element == e)
+        PA_LLIST_INSERT_AFTER(pa_alsa_option, e->options, p->last_option, o);
+    else
+        PA_LLIST_PREPEND(pa_alsa_option, e->options, o);
+
+finish:
+    p->last_option = o;
+    return o;
+}
+
+static int element_parse_switch(pa_config_parser_state *state) {
+    pa_alsa_path *p;
+    pa_alsa_element *e;
+
+    pa_assert(state);
+
+    p = state->userdata;
+
+    if (!(e = pa_alsa_element_get(p, state->section, true))) {
+        pa_log("[%s:%u] Switch makes no sense in '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    if (pa_streq(state->rvalue, "ignore"))
+        e->switch_use = PA_ALSA_SWITCH_IGNORE;
+    else if (pa_streq(state->rvalue, "mute"))
+        e->switch_use = PA_ALSA_SWITCH_MUTE;
+    else if (pa_streq(state->rvalue, "off"))
+        e->switch_use = PA_ALSA_SWITCH_OFF;
+    else if (pa_streq(state->rvalue, "on"))
+        e->switch_use = PA_ALSA_SWITCH_ON;
+    else if (pa_streq(state->rvalue, "select"))
+        e->switch_use = PA_ALSA_SWITCH_SELECT;
+    else {
+        pa_log("[%s:%u] Switch invalid of '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    return 0;
+}
+
+static int element_parse_volume(pa_config_parser_state *state) {
+    pa_alsa_path *p;
+    pa_alsa_element *e;
+
+    pa_assert(state);
+
+    p = state->userdata;
+
+    if (!(e = pa_alsa_element_get(p, state->section, true))) {
+        pa_log("[%s:%u] Volume makes no sense in '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    if (pa_streq(state->rvalue, "ignore"))
+        e->volume_use = PA_ALSA_VOLUME_IGNORE;
+    else if (pa_streq(state->rvalue, "merge"))
+        e->volume_use = PA_ALSA_VOLUME_MERGE;
+    else if (pa_streq(state->rvalue, "off"))
+        e->volume_use = PA_ALSA_VOLUME_OFF;
+    else if (pa_streq(state->rvalue, "zero"))
+        e->volume_use = PA_ALSA_VOLUME_ZERO;
+    else {
+        uint32_t constant;
+
+        if (pa_atou(state->rvalue, &constant) >= 0) {
+            e->volume_use = PA_ALSA_VOLUME_CONSTANT;
+            e->constant_volume = constant;
+        } else {
+            pa_log("[%s:%u] Volume invalid of '%s'", state->filename, state->lineno, state->section);
+            return -1;
+        }
+    }
+
+    return 0;
+}
+
+static int element_parse_enumeration(pa_config_parser_state *state) {
+    pa_alsa_path *p;
+    pa_alsa_element *e;
+
+    pa_assert(state);
+
+    p = state->userdata;
+
+    if (!(e = pa_alsa_element_get(p, state->section, true))) {
+        pa_log("[%s:%u] Enumeration makes no sense in '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    if (pa_streq(state->rvalue, "ignore"))
+        e->enumeration_use = PA_ALSA_ENUMERATION_IGNORE;
+    else if (pa_streq(state->rvalue, "select"))
+        e->enumeration_use = PA_ALSA_ENUMERATION_SELECT;
+    else {
+        pa_log("[%s:%u] Enumeration invalid of '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    return 0;
+}
+
+static int parse_type(pa_config_parser_state *state) {
+    struct device_port_types {
+        const char *name;
+        pa_device_port_type_t type;
+    } device_port_types[] = {
+        { "unknown",      PA_DEVICE_PORT_TYPE_UNKNOWN },
+        { "aux",          PA_DEVICE_PORT_TYPE_AUX },
+        { "speaker",      PA_DEVICE_PORT_TYPE_SPEAKER },
+        { "headphones",   PA_DEVICE_PORT_TYPE_HEADPHONES },
+        { "line",         PA_DEVICE_PORT_TYPE_LINE },
+        { "mic",          PA_DEVICE_PORT_TYPE_MIC },
+        { "headset",      PA_DEVICE_PORT_TYPE_HEADSET },
+        { "handset",      PA_DEVICE_PORT_TYPE_HANDSET },
+        { "earpiece",     PA_DEVICE_PORT_TYPE_EARPIECE },
+        { "spdif",        PA_DEVICE_PORT_TYPE_SPDIF },
+        { "hdmi",         PA_DEVICE_PORT_TYPE_HDMI },
+        { "tv",           PA_DEVICE_PORT_TYPE_TV },
+        { "radio",        PA_DEVICE_PORT_TYPE_RADIO },
+        { "video",        PA_DEVICE_PORT_TYPE_VIDEO },
+        { "usb",          PA_DEVICE_PORT_TYPE_USB },
+        { "bluetooth",    PA_DEVICE_PORT_TYPE_BLUETOOTH },
+        { "portable",     PA_DEVICE_PORT_TYPE_PORTABLE },
+        { "handsfree",    PA_DEVICE_PORT_TYPE_HANDSFREE },
+        { "car",          PA_DEVICE_PORT_TYPE_CAR },
+        { "hifi",         PA_DEVICE_PORT_TYPE_HIFI },
+        { "phone",        PA_DEVICE_PORT_TYPE_PHONE },
+        { "network",      PA_DEVICE_PORT_TYPE_NETWORK },
+        { "analog",       PA_DEVICE_PORT_TYPE_ANALOG },
+    };
+    pa_alsa_path *path;
+    unsigned int idx;
+
+    path = state->userdata;
+
+    for (idx = 0; idx < PA_ELEMENTSOF(device_port_types); idx++)
+        if (pa_streq(state->rvalue, device_port_types[idx].name)) {
+            path->device_port_type = device_port_types[idx].type;
+            return 0;
+        }
+
+    pa_log("[%s:%u] Invalid value for option 'type': %s", state->filename, state->lineno, state->rvalue);
+    return -1;
+}
+
+static int parse_eld_device(pa_config_parser_state *state) {
+    pa_alsa_path *path;
+    uint32_t eld_device;
+
+    path = state->userdata;
+
+    if (pa_atou(state->rvalue, &eld_device) >= 0) {
+        path->autodetect_eld_device = false;
+        path->eld_device = eld_device;
+        return 0;
+    }
+
+    if (pa_streq(state->rvalue, "auto")) {
+        path->autodetect_eld_device = true;
+        path->eld_device = -1;
+        return 0;
+    }
+
+    pa_log("[%s:%u] Invalid value for option 'eld-device': %s", state->filename, state->lineno, state->rvalue);
+    return -1;
+}
+
+static int option_parse_priority(pa_config_parser_state *state) {
+    pa_alsa_path *p;
+    pa_alsa_option *o;
+    uint32_t prio;
+
+    pa_assert(state);
+
+    p = state->userdata;
+
+    if (!(o = option_get(p, state->section))) {
+        pa_log("[%s:%u] Priority makes no sense in '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    if (pa_atou(state->rvalue, &prio) < 0) {
+        pa_log("[%s:%u] Priority invalid of '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    o->priority = prio;
+    return 0;
+}
+
+static int option_parse_name(pa_config_parser_state *state) {
+    pa_alsa_path *p;
+    pa_alsa_option *o;
+
+    pa_assert(state);
+
+    p = state->userdata;
+
+    if (!(o = option_get(p, state->section))) {
+        pa_log("[%s:%u] Name makes no sense in '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    pa_xfree(o->name);
+    o->name = pa_xstrdup(state->rvalue);
+
+    return 0;
+}
+
+static int element_parse_required(pa_config_parser_state *state) {
+    pa_alsa_path *p;
+    pa_alsa_element *e;
+    pa_alsa_option *o;
+    pa_alsa_jack *j;
+    pa_alsa_required_t req;
+
+    pa_assert(state);
+
+    p = state->userdata;
+
+    e = pa_alsa_element_get(p, state->section, true);
+    o = option_get(p, state->section);
+    j = jack_get(p, state->section);
+    if (!e && !o && !j) {
+        pa_log("[%s:%u] Required makes no sense in '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    if (pa_streq(state->rvalue, "ignore"))
+        req = PA_ALSA_REQUIRED_IGNORE;
+    else if (pa_streq(state->rvalue, "switch") && e)
+        req = PA_ALSA_REQUIRED_SWITCH;
+    else if (pa_streq(state->rvalue, "volume") && e)
+        req = PA_ALSA_REQUIRED_VOLUME;
+    else if (pa_streq(state->rvalue, "enumeration"))
+        req = PA_ALSA_REQUIRED_ENUMERATION;
+    else if (pa_streq(state->rvalue, "any"))
+        req = PA_ALSA_REQUIRED_ANY;
+    else {
+        pa_log("[%s:%u] Required invalid of '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    if (pa_streq(state->lvalue, "required-absent")) {
+        if (e)
+            e->required_absent = req;
+        if (o)
+            o->required_absent = req;
+        if (j)
+            j->required_absent = req;
+    }
+    else if (pa_streq(state->lvalue, "required-any")) {
+        if (e) {
+            e->required_any = req;
+            e->path->has_req_any |= (req != PA_ALSA_REQUIRED_IGNORE);
+        }
+        if (o) {
+            o->required_any = req;
+            o->element->path->has_req_any |= (req != PA_ALSA_REQUIRED_IGNORE);
+        }
+        if (j) {
+            j->required_any = req;
+            j->path->has_req_any |= (req != PA_ALSA_REQUIRED_IGNORE);
+        }
+
+    }
+    else {
+        if (e)
+            e->required = req;
+        if (o)
+            o->required = req;
+        if (j)
+            j->required = req;
+    }
+
+    return 0;
+}
+
+static int element_parse_direction(pa_config_parser_state *state) {
+    pa_alsa_path *p;
+    pa_alsa_element *e;
+
+    pa_assert(state);
+
+    p = state->userdata;
+
+    if (!(e = pa_alsa_element_get(p, state->section, true))) {
+        pa_log("[%s:%u] Direction makes no sense in '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    if (pa_streq(state->rvalue, "playback"))
+        e->direction = PA_ALSA_DIRECTION_OUTPUT;
+    else if (pa_streq(state->rvalue, "capture"))
+        e->direction = PA_ALSA_DIRECTION_INPUT;
+    else {
+        pa_log("[%s:%u] Direction invalid of '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    return 0;
+}
+
+static int element_parse_direction_try_other(pa_config_parser_state *state) {
+    pa_alsa_path *p;
+    pa_alsa_element *e;
+    int yes;
+
+    pa_assert(state);
+
+    p = state->userdata;
+
+    if (!(e = pa_alsa_element_get(p, state->section, true))) {
+        pa_log("[%s:%u] Direction makes no sense in '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    if ((yes = pa_parse_boolean(state->rvalue)) < 0) {
+        pa_log("[%s:%u] Direction invalid of '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    e->direction_try_other = !!yes;
+    return 0;
+}
+
+static int element_parse_volume_limit(pa_config_parser_state *state) {
+    pa_alsa_path *p;
+    pa_alsa_element *e;
+    long volume_limit;
+
+    pa_assert(state);
+
+    p = state->userdata;
+
+    if (!(e = pa_alsa_element_get(p, state->section, true))) {
+        pa_log("[%s:%u] volume-limit makes no sense in '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    if (pa_atol(state->rvalue, &volume_limit) < 0 || volume_limit < 0) {
+        pa_log("[%s:%u] Invalid value for volume-limit", state->filename, state->lineno);
+        return -1;
+    }
+
+    e->volume_limit = volume_limit;
+    return 0;
+}
+
+static unsigned int parse_channel_position(const char *m)
+{
+    pa_channel_position_t p;
+
+    if ((p = pa_channel_position_from_string(m)) == PA_CHANNEL_POSITION_INVALID)
+        return SND_MIXER_SCHN_UNKNOWN;
+
+    return alsa_channel_ids[p];
+}
+
+static pa_channel_position_mask_t parse_mask(const char *m) {
+    pa_channel_position_mask_t v;
+
+    if (pa_streq(m, "all-left"))
+        v = PA_CHANNEL_POSITION_MASK_LEFT;
+    else if (pa_streq(m, "all-right"))
+        v = PA_CHANNEL_POSITION_MASK_RIGHT;
+    else if (pa_streq(m, "all-center"))
+        v = PA_CHANNEL_POSITION_MASK_CENTER;
+    else if (pa_streq(m, "all-front"))
+        v = PA_CHANNEL_POSITION_MASK_FRONT;
+    else if (pa_streq(m, "all-rear"))
+        v = PA_CHANNEL_POSITION_MASK_REAR;
+    else if (pa_streq(m, "all-side"))
+        v = PA_CHANNEL_POSITION_MASK_SIDE_OR_TOP_CENTER;
+    else if (pa_streq(m, "all-top"))
+        v = PA_CHANNEL_POSITION_MASK_TOP;
+    else if (pa_streq(m, "all-no-lfe"))
+        v = PA_CHANNEL_POSITION_MASK_ALL ^ PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_LFE);
+    else if (pa_streq(m, "all"))
+        v = PA_CHANNEL_POSITION_MASK_ALL;
+    else {
+        pa_channel_position_t p;
+
+        if ((p = pa_channel_position_from_string(m)) == PA_CHANNEL_POSITION_INVALID)
+            return 0;
+
+        v = PA_CHANNEL_POSITION_MASK(p);
+    }
+
+    return v;
+}
+
+static int element_parse_override_map(pa_config_parser_state *state) {
+    pa_alsa_path *p;
+    pa_alsa_element *e;
+    const char *split_state = NULL;
+    char *s;
+    unsigned i = 0;
+    int channel_count = 0;
+    char *n;
+
+    pa_assert(state);
+
+    p = state->userdata;
+
+    if (!(e = pa_alsa_element_get(p, state->section, true))) {
+        pa_log("[%s:%u] Override map makes no sense in '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    s = strstr(state->lvalue, ".");
+    if (s) {
+        pa_atoi(s + 1, &channel_count);
+        if (channel_count < 1 || channel_count > POSITION_MASK_CHANNELS) {
+            pa_log("[%s:%u] Override map index '%s' invalid in '%s'", state->filename, state->lineno, state->lvalue, state->section);
+            return 0;
+        }
+    } else {
+        pa_log("[%s:%u] Invalid override map syntax '%s' in '%s'", state->filename, state->lineno, state->lvalue, state->section);
+        return -1;
+    }
+
+    while ((n = pa_split(state->rvalue, ",", &split_state))) {
+        pa_channel_position_mask_t m;
+        snd_mixer_selem_channel_id_t channel_position;
+
+        if (i >= (unsigned)channel_count) {
+            pa_log("[%s:%u] Invalid override map size (>%d) in '%s'", state->filename, state->lineno, channel_count, state->section);
+            pa_xfree(n);
+            return -1;
+        }
+        channel_position = alsa_channel_positions[i];
+
+        if (!*n)
+            m = 0;
+        else {
+            s = strstr(n, ":");
+            if (s) {
+                *s = '\0';
+                s++;
+                channel_position = parse_channel_position(n);
+                if (channel_position == SND_MIXER_SCHN_UNKNOWN) {
+                    pa_log("[%s:%u] Override map position '%s' invalid in '%s'", state->filename, state->lineno, n, state->section);
+                    pa_xfree(n);
+                    return -1;
+                }
+            }
+            if ((m = parse_mask(s ? s : n)) == 0) {
+                pa_log("[%s:%u] Override map '%s' invalid in '%s'", state->filename, state->lineno, s ? s : n, state->section);
+                pa_xfree(n);
+                return -1;
+            }
+        }
+
+        if (e->masks[channel_position][channel_count-1]) {
+            pa_log("[%s:%u] Override map '%s' duplicate position '%s' in '%s'", state->filename, state->lineno, s ? s : n, snd_mixer_selem_channel_name(channel_position), state->section);
+            pa_xfree(n);
+            return -1;
+        }
+        e->override_map |= (1 << (channel_count - 1));
+        e->masks[channel_position][channel_count-1] = m;
+        pa_xfree(n);
+        i++;
+    }
+
+    return 0;
+}
+
+static int jack_parse_state(pa_config_parser_state *state) {
+    pa_alsa_path *p;
+    pa_alsa_jack *j;
+    pa_available_t pa;
+
+    pa_assert(state);
+
+    p = state->userdata;
+
+    if (!(j = jack_get(p, state->section))) {
+        pa_log("[%s:%u] state makes no sense in '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    if (pa_streq(state->rvalue, "yes"))
+        pa = PA_AVAILABLE_YES;
+    else if (pa_streq(state->rvalue, "no"))
+        pa = PA_AVAILABLE_NO;
+    else if (pa_streq(state->rvalue, "unknown"))
+        pa = PA_AVAILABLE_UNKNOWN;
+    else {
+        pa_log("[%s:%u] state must be 'yes', 'no' or 'unknown' in '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    if (pa_streq(state->lvalue, "state.unplugged"))
+        j->state_unplugged = pa;
+    else {
+        j->state_plugged = pa;
+        pa_assert(pa_streq(state->lvalue, "state.plugged"));
+    }
+
+    return 0;
+}
+
+static int jack_parse_append_pcm_to_name(pa_config_parser_state *state) {
+    pa_alsa_path *path;
+    pa_alsa_jack *jack;
+    int b;
+
+    pa_assert(state);
+
+    path = state->userdata;
+    if (!(jack = jack_get(path, state->section))) {
+        pa_log("[%s:%u] Option 'append_pcm_to_name' not expected in section '%s'",
+               state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    b = pa_parse_boolean(state->rvalue);
+    if (b < 0) {
+        pa_log("[%s:%u] Invalid value for 'append_pcm_to_name': %s", state->filename, state->lineno, state->rvalue);
+        return -1;
+    }
+
+    jack->append_pcm_to_name = b;
+    return 0;
+}
+
+static int element_set_option(pa_alsa_element *e, snd_mixer_t *m, int alsa_idx) {
+    snd_mixer_selem_id_t *sid;
+    snd_mixer_elem_t *me;
+    char buf[64];
+    int r;
+
+    pa_assert(e);
+    pa_assert(m);
+
+    SELEM_INIT(sid, &e->alsa_id);
+    if (!(me = snd_mixer_find_selem(m, sid))) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log_warn("Element %s seems to have disappeared.", buf);
+        return -1;
+    }
+
+    if (e->switch_use == PA_ALSA_SWITCH_SELECT) {
+
+        if (e->direction == PA_ALSA_DIRECTION_OUTPUT)
+            r = snd_mixer_selem_set_playback_switch_all(me, alsa_idx);
+        else
+            r = snd_mixer_selem_set_capture_switch_all(me, alsa_idx);
+
+        if (r < 0) {
+            pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+            pa_log_warn("Failed to set switch of %s: %s", buf, pa_alsa_strerror(errno));
+        }
+
+    } else {
+        pa_assert(e->enumeration_use == PA_ALSA_ENUMERATION_SELECT);
+
+        if ((r = snd_mixer_selem_set_enum_item(me, 0, alsa_idx)) < 0) {
+            pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+            pa_log_warn("Failed to set enumeration of %s: %s", buf, pa_alsa_strerror(errno));
+        }
+    }
+
+    return r;
+}
+
+static int setting_select(pa_alsa_setting *s, snd_mixer_t *m) {
+    pa_alsa_option *o;
+    uint32_t idx;
+
+    pa_assert(s);
+    pa_assert(m);
+
+    PA_IDXSET_FOREACH(o, s->options, idx)
+        element_set_option(o->element, m, o->alsa_idx);
+
+    return 0;
+}
+
+static int option_verify(pa_alsa_option *o) {
+    static const struct description_map well_known_descriptions[] = {
+        { "input",                     N_("Input") },
+        { "input-docking",             N_("Docking Station Input") },
+        { "input-docking-microphone",  N_("Docking Station Microphone") },
+        { "input-docking-linein",      N_("Docking Station Line In") },
+        { "input-linein",              N_("Line In") },
+        { "input-microphone",          N_("Microphone") },
+        { "input-microphone-front",    N_("Front Microphone") },
+        { "input-microphone-rear",     N_("Rear Microphone") },
+        { "input-microphone-external", N_("External Microphone") },
+        { "input-microphone-internal", N_("Internal Microphone") },
+        { "input-radio",               N_("Radio") },
+        { "input-video",               N_("Video") },
+        { "input-agc-on",              N_("Automatic Gain Control") },
+        { "input-agc-off",             N_("No Automatic Gain Control") },
+        { "input-boost-on",            N_("Boost") },
+        { "input-boost-off",           N_("No Boost") },
+        { "output-amplifier-on",       N_("Amplifier") },
+        { "output-amplifier-off",      N_("No Amplifier") },
+        { "output-bass-boost-on",      N_("Bass Boost") },
+        { "output-bass-boost-off",     N_("No Bass Boost") },
+        { "output-speaker",            N_("Speaker") },
+        { "output-headphones",         N_("Headphones") }
+    };
+    char buf[64];
+
+    pa_assert(o);
+
+    if (!o->name) {
+        pa_log("No name set for option %s", o->alsa_name);
+        return -1;
+    }
+
+    if (o->element->enumeration_use != PA_ALSA_ENUMERATION_SELECT &&
+        o->element->switch_use != PA_ALSA_SWITCH_SELECT) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &o->element->alsa_id);
+        pa_log("Element %s of option %s not set for select.", buf, o->name);
+        return -1;
+    }
+
+    if (o->element->switch_use == PA_ALSA_SWITCH_SELECT &&
+        !pa_streq(o->alsa_name, "on") &&
+        !pa_streq(o->alsa_name, "off")) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &o->element->alsa_id);
+        pa_log("Switch %s options need be named off or on ", buf);
+        return -1;
+    }
+
+    if (!o->description)
+        o->description = pa_xstrdup(lookup_description(o->name,
+                                                       well_known_descriptions,
+                                                       PA_ELEMENTSOF(well_known_descriptions)));
+    if (!o->description)
+        o->description = pa_xstrdup(o->name);
+
+    return 0;
+}
+
+static int element_verify(pa_alsa_element *e) {
+    pa_alsa_option *o;
+    char buf[64];
+
+    pa_assert(e);
+
+//    pa_log_debug("Element %s, path %s: r=%d, r-any=%d, r-abs=%d", e->alsa_name, e->path->name, e->required, e->required_any, e->required_absent);
+    if ((e->required != PA_ALSA_REQUIRED_IGNORE && e->required == e->required_absent) ||
+        (e->required_any != PA_ALSA_REQUIRED_IGNORE && e->required_any == e->required_absent) ||
+        (e->required_absent == PA_ALSA_REQUIRED_ANY && e->required_any != PA_ALSA_REQUIRED_IGNORE) ||
+        (e->required_absent == PA_ALSA_REQUIRED_ANY && e->required != PA_ALSA_REQUIRED_IGNORE)) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log("Element %s cannot be required and absent at the same time.", buf);
+        return -1;
+    }
+
+    if (e->switch_use == PA_ALSA_SWITCH_SELECT && e->enumeration_use == PA_ALSA_ENUMERATION_SELECT) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log("Element %s cannot set select for both switch and enumeration.", buf);
+        return -1;
+    }
+
+    PA_LLIST_FOREACH(o, e->options)
+        if (option_verify(o) < 0)
+            return -1;
+
+    return 0;
+}
+
+static int path_verify(pa_alsa_path *p) {
+    static const struct description2_map well_known_descriptions[] = {
+        { "analog-input",                     N_("Analog Input"),                 PA_DEVICE_PORT_TYPE_ANALOG },
+        { "analog-input-microphone",          N_("Microphone"),                   PA_DEVICE_PORT_TYPE_MIC },
+        { "analog-input-microphone-front",    N_("Front Microphone"),             PA_DEVICE_PORT_TYPE_MIC },
+        { "analog-input-microphone-rear",     N_("Rear Microphone"),              PA_DEVICE_PORT_TYPE_MIC },
+        { "analog-input-microphone-dock",     N_("Dock Microphone"),              PA_DEVICE_PORT_TYPE_MIC },
+        { "analog-input-microphone-internal", N_("Internal Microphone"),          PA_DEVICE_PORT_TYPE_MIC },
+        { "analog-input-microphone-headset",  N_("Headset Microphone"),           PA_DEVICE_PORT_TYPE_HEADSET },
+        { "analog-input-linein",              N_("Line In"),                      PA_DEVICE_PORT_TYPE_LINE },
+        { "analog-input-radio",               N_("Radio"),                        PA_DEVICE_PORT_TYPE_RADIO },
+        { "analog-input-video",               N_("Video"),                        PA_DEVICE_PORT_TYPE_VIDEO },
+        { "analog-output",                    N_("Analog Output"),                PA_DEVICE_PORT_TYPE_ANALOG },
+        { "analog-output-headphones",         N_("Headphones"),                   PA_DEVICE_PORT_TYPE_HEADPHONES },
+        { "analog-output-headphones-2",       N_("Headphones 2"),                 PA_DEVICE_PORT_TYPE_HEADPHONES },
+        { "analog-output-headphones-mono",    N_("Headphones Mono Output"),       PA_DEVICE_PORT_TYPE_HEADPHONES },
+        { "analog-output-lineout",            N_("Line Out"),                     PA_DEVICE_PORT_TYPE_LINE },
+        { "analog-output-mono",               N_("Analog Mono Output"),           PA_DEVICE_PORT_TYPE_ANALOG },
+        { "analog-output-speaker",            N_("Speakers"),                     PA_DEVICE_PORT_TYPE_SPEAKER },
+        { "hdmi-output",                      N_("HDMI / DisplayPort"),           PA_DEVICE_PORT_TYPE_HDMI },
+        { "iec958-stereo-output",             N_("Digital Output (S/PDIF)"),      PA_DEVICE_PORT_TYPE_SPDIF },
+        { "iec958-stereo-input",              N_("Digital Input (S/PDIF)"),       PA_DEVICE_PORT_TYPE_SPDIF },
+        { "multichannel-input",               N_("Multichannel Input"),           PA_DEVICE_PORT_TYPE_LINE },
+        { "multichannel-output",              N_("Multichannel Output"),          PA_DEVICE_PORT_TYPE_LINE },
+        { "steelseries-arctis-output-game-common", N_("Game Output"),             PA_DEVICE_PORT_TYPE_HEADSET },
+        { "steelseries-arctis-output-chat-common", N_("Chat Output"),             PA_DEVICE_PORT_TYPE_HEADSET },
+        { "analog-chat-output",               N_("Chat Output"),                  PA_DEVICE_PORT_TYPE_HEADSET },
+        { "analog-chat-input",                N_("Chat Input"),                   PA_DEVICE_PORT_TYPE_HEADSET },
+        { "virtual-surround-7.1",             N_("Virtual Surround 7.1"),         PA_DEVICE_PORT_TYPE_HEADPHONES },
+    };
+
+    pa_alsa_element *e;
+    const char *key = p->description_key ? p->description_key : p->name;
+    const struct description2_map *map = lookup_description2(key,
+                                                             well_known_descriptions,
+                                                             PA_ELEMENTSOF(well_known_descriptions));
+
+    pa_assert(p);
+
+    PA_LLIST_FOREACH(e, p->elements)
+        if (element_verify(e) < 0)
+            return -1;
+
+    if (map) {
+        if (p->device_port_type == PA_DEVICE_PORT_TYPE_UNKNOWN)
+            p->device_port_type = map->type;
+        if (!p->description)
+            p->description = pa_xstrdup(_(map->description));
+    }
+
+    if (!p->description) {
+        if (p->description_key)
+            pa_log_warn("Path %s: Unrecognized description key: %s", p->name, p->description_key);
+
+        p->description = pa_xstrdup(p->name);
+    }
+
+    return 0;
+}
+
+static const char *get_default_paths_dir(void) {
+    const char *str;
+#ifdef HAVE_RUNNING_FROM_BUILD_TREE
+    if (pa_run_from_build_tree())
+        return PA_SRCDIR "mixer/paths";
+    else
+#endif
+    if (getenv("ACP_BUILDDIR") != NULL)
+        return "mixer/paths";
+    if ((str = getenv("ACP_PATHS_DIR")) != NULL)
+        return str;
+    return PA_ALSA_PATHS_DIR;
+}
+
+pa_alsa_path* pa_alsa_path_new(const char *paths_dir, const char *fname, pa_alsa_direction_t direction) {
+    pa_alsa_path *p;
+    char *fn;
+    int r;
+    const char *n;
+    bool mute_during_activation = false;
+
+    pa_config_item items[] = {
+        /* [General] */
+        { "priority",            pa_config_parse_unsigned,          NULL, "General" },
+        { "description-key",     pa_config_parse_string,            NULL, "General" },
+        { "description",         pa_config_parse_string,            NULL, "General" },
+        { "mute-during-activation", pa_config_parse_bool,           NULL, "General" },
+        { "type",                parse_type,                        NULL, "General" },
+        { "eld-device",          parse_eld_device,                  NULL, "General" },
+
+        /* [Option ...] */
+        { "priority",            option_parse_priority,             NULL, NULL },
+        { "name",                option_parse_name,                 NULL, NULL },
+
+        /* [Jack ...] */
+        { "state.plugged",       jack_parse_state,                  NULL, NULL },
+        { "state.unplugged",     jack_parse_state,                  NULL, NULL },
+        { "append-pcm-to-name",  jack_parse_append_pcm_to_name,     NULL, NULL },
+
+        /* [Element ...] */
+        { "switch",              element_parse_switch,              NULL, NULL },
+        { "volume",              element_parse_volume,              NULL, NULL },
+        { "enumeration",         element_parse_enumeration,         NULL, NULL },
+        { "override-map.1",      element_parse_override_map,        NULL, NULL },
+        { "override-map.2",      element_parse_override_map,        NULL, NULL },
+        { "override-map.3",      element_parse_override_map,        NULL, NULL },
+        { "override-map.4",      element_parse_override_map,        NULL, NULL },
+        { "override-map.5",      element_parse_override_map,        NULL, NULL },
+        { "override-map.6",      element_parse_override_map,        NULL, NULL },
+        { "override-map.7",      element_parse_override_map,        NULL, NULL },
+        { "override-map.8",      element_parse_override_map,        NULL, NULL },
+#if POSITION_MASK_CHANNELS > 8
+#error "Add override-map.9+ definitions"
+#endif
+        /* ... later on we might add override-map.3 and so on here ... */
+        { "required",            element_parse_required,            NULL, NULL },
+        { "required-any",        element_parse_required,            NULL, NULL },
+        { "required-absent",     element_parse_required,            NULL, NULL },
+        { "direction",           element_parse_direction,           NULL, NULL },
+        { "direction-try-other", element_parse_direction_try_other, NULL, NULL },
+        { "volume-limit",        element_parse_volume_limit,        NULL, NULL },
+        { NULL, NULL, NULL, NULL }
+    };
+
+    pa_assert(fname);
+
+    p = pa_xnew0(pa_alsa_path, 1);
+    n = pa_path_get_filename(fname);
+    p->name = pa_xstrndup(n, strcspn(n, "."));
+    p->proplist = pa_proplist_new();
+    p->direction = direction;
+    p->eld_device = -1;
+
+    items[0].data = &p->priority;
+    items[1].data = &p->description_key;
+    items[2].data = &p->description;
+    items[3].data = &mute_during_activation;
+
+    if (!paths_dir)
+        paths_dir = get_default_paths_dir();
+
+    fn = pa_maybe_prefix_path(fname, paths_dir);
+
+    r = pa_config_parse(fn, NULL, items, p->proplist, false, p);
+    pa_xfree(fn);
+
+    if (r < 0)
+        goto fail;
+
+    p->mute_during_activation = mute_during_activation;
+
+    if (path_verify(p) < 0)
+        goto fail;
+
+    if (p->description) {
+	    char *tmp = p->description;
+	    p->description = pa_xstrdup(_(tmp));
+	    free(tmp);
+    }
+
+    return p;
+
+fail:
+    pa_alsa_path_free(p);
+    return NULL;
+}
+
+pa_alsa_path *pa_alsa_path_synthesize(const char *element, pa_alsa_direction_t direction) {
+    pa_alsa_path *p;
+    pa_alsa_element *e;
+    char *name;
+    int index;
+
+    pa_assert(element);
+
+    name = alloca(strlen(element) + 1);
+    if (alsa_id_decode(element, name, &index))
+        return NULL;
+
+    p = pa_xnew0(pa_alsa_path, 1);
+    p->name = pa_xstrdup(element);
+    p->direction = direction;
+    p->proplist = pa_proplist_new();
+
+    e = pa_xnew0(pa_alsa_element, 1);
+    e->path = p;
+    e->alsa_id.name = pa_xstrdup(name);
+    e->alsa_id.index = index;
+    e->direction = direction;
+    e->volume_limit = -1;
+
+    e->switch_use = PA_ALSA_SWITCH_MUTE;
+    e->volume_use = PA_ALSA_VOLUME_MERGE;
+
+    PA_LLIST_PREPEND(pa_alsa_element, p->elements, e);
+    p->last_element = e;
+    return p;
+}
+
+static bool element_drop_unsupported(pa_alsa_element *e) {
+    pa_alsa_option *o, *n;
+
+    pa_assert(e);
+
+    for (o = e->options; o; o = n) {
+        n = o->next;
+
+        if (o->alsa_idx < 0) {
+            PA_LLIST_REMOVE(pa_alsa_option, e->options, o);
+            option_free(o);
+        }
+    }
+
+    return
+        e->switch_use != PA_ALSA_SWITCH_IGNORE ||
+        e->volume_use != PA_ALSA_VOLUME_IGNORE ||
+        e->enumeration_use != PA_ALSA_ENUMERATION_IGNORE;
+}
+
+static void path_drop_unsupported(pa_alsa_path *p) {
+    pa_alsa_element *e, *n;
+
+    pa_assert(p);
+
+    for (e = p->elements; e; e = n) {
+        n = e->next;
+
+        if (!element_drop_unsupported(e)) {
+            PA_LLIST_REMOVE(pa_alsa_element, p->elements, e);
+            element_free(e);
+        }
+    }
+}
+
+static void path_make_options_unique(pa_alsa_path *p) {
+    pa_alsa_element *e;
+    pa_alsa_option *o, *u;
+
+    PA_LLIST_FOREACH(e, p->elements) {
+        PA_LLIST_FOREACH(o, e->options) {
+            unsigned i;
+            char *m;
+
+            for (u = o->next; u; u = u->next)
+                if (pa_streq(u->name, o->name))
+                    break;
+
+            if (!u)
+                continue;
+
+            m = pa_xstrdup(o->name);
+
+            /* OK, this name is not unique, hence let's rename */
+            for (i = 1, u = o; u; u = u->next) {
+                char *nn, *nd;
+
+                if (!pa_streq(u->name, m))
+                    continue;
+
+                nn = pa_sprintf_malloc("%s-%u", m, i);
+                pa_xfree(u->name);
+                u->name = nn;
+
+                nd = pa_sprintf_malloc("%s %u", u->description, i);
+                pa_xfree(u->description);
+                u->description = nd;
+
+                i++;
+            }
+
+            pa_xfree(m);
+        }
+    }
+}
+
+static bool element_create_settings(pa_alsa_element *e, pa_alsa_setting *template) {
+    pa_alsa_option *o;
+
+    for (; e; e = e->next)
+        if (e->switch_use == PA_ALSA_SWITCH_SELECT ||
+            e->enumeration_use == PA_ALSA_ENUMERATION_SELECT)
+            break;
+
+    if (!e)
+        return false;
+
+    for (o = e->options; o; o = o->next) {
+        pa_alsa_setting *s;
+
+        if (template) {
+            s = pa_xnewdup(pa_alsa_setting, template, 1);
+            s->options = pa_idxset_copy(template->options, NULL);
+            s->name = pa_sprintf_malloc("%s+%s", template->name, o->name);
+            s->description =
+                (template->description[0] && o->description[0])
+                ? pa_sprintf_malloc("%s / %s", template->description, o->description)
+                : (template->description[0]
+                   ? pa_xstrdup(template->description)
+                   : pa_xstrdup(o->description));
+
+            s->priority = PA_MAX(template->priority, o->priority);
+        } else {
+            s = pa_xnew0(pa_alsa_setting, 1);
+            s->options = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+            s->name = pa_xstrdup(o->name);
+            s->description = pa_xstrdup(o->description);
+            s->priority = o->priority;
+        }
+
+        pa_idxset_put(s->options, o, NULL);
+
+        if (element_create_settings(e->next, s))
+            /* This is not a leaf, so let's get rid of it */
+            setting_free(s);
+        else {
+            /* This is a leaf, so let's add it */
+            PA_LLIST_INSERT_AFTER(pa_alsa_setting, e->path->settings, e->path->last_setting, s);
+
+            e->path->last_setting = s;
+        }
+    }
+
+    return true;
+}
+
+static void path_create_settings(pa_alsa_path *p) {
+    pa_assert(p);
+
+    element_create_settings(p->elements, NULL);
+}
+
+int pa_alsa_path_probe(pa_alsa_path *p, pa_alsa_mapping *mapping, snd_mixer_t *m, bool ignore_dB) {
+    pa_alsa_element *e;
+    pa_alsa_jack *j;
+    double min_dB[PA_CHANNEL_POSITION_MAX], max_dB[PA_CHANNEL_POSITION_MAX];
+    pa_channel_position_t t;
+    pa_channel_position_mask_t path_volume_channels = 0;
+    bool min_dB_set, max_dB_set;
+    char buf[64];
+
+    pa_assert(p);
+    pa_assert(m);
+
+    if (p->probed)
+        return p->supported ? 0 : -1;
+    p->probed = true;
+
+    pa_zero(min_dB);
+    pa_zero(max_dB);
+
+    pa_log_debug("Probing path '%s'", p->name);
+
+    PA_LLIST_FOREACH(j, p->jacks) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &j->alsa_id);
+        if (jack_probe(j, mapping, m) < 0) {
+            p->supported = false;
+            pa_log_debug("Probe of jack %s failed.", buf);
+            return -1;
+        }
+        pa_log_debug("Probe of jack %s succeeded (%s)", buf, j->has_control ? "found!" : "not found");
+    }
+
+    PA_LLIST_FOREACH(e, p->elements) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        if (element_probe(e, m) < 0) {
+            p->supported = false;
+            pa_log_debug("Probe of element %s failed.", buf);
+            return -1;
+        }
+        pa_log_debug("Probe of element %s succeeded (volume=%d, switch=%d, enumeration=%d, has_dB=%d).", buf, e->volume_use, e->switch_use, e->enumeration_use, e->has_dB);
+
+        if (ignore_dB)
+            e->has_dB = false;
+
+        if (e->volume_use == PA_ALSA_VOLUME_MERGE) {
+
+            if (!p->has_volume) {
+                p->min_volume = e->min_volume;
+                p->max_volume = e->max_volume;
+            }
+
+            if (e->has_dB) {
+                if (!p->has_volume) {
+                    for (t = 0; t < PA_CHANNEL_POSITION_MAX; t++)
+                        if (PA_CHANNEL_POSITION_MASK(t) & e->merged_mask) {
+                            min_dB[t] = e->min_dB;
+                            max_dB[t] = e->max_dB;
+                            path_volume_channels |= PA_CHANNEL_POSITION_MASK(t);
+                        }
+
+                    p->has_dB = true;
+                } else {
+
+                    if (p->has_dB) {
+                        for (t = 0; t < PA_CHANNEL_POSITION_MAX; t++)
+                            if (PA_CHANNEL_POSITION_MASK(t) & e->merged_mask) {
+                                min_dB[t] += e->min_dB;
+                                max_dB[t] += e->max_dB;
+                                path_volume_channels |= PA_CHANNEL_POSITION_MASK(t);
+                            }
+                    } else {
+                        /* Hmm, there's another element before us
+                         * which cannot do dB volumes, so we we need
+                         * to 'neutralize' this slider */
+                        e->volume_use = PA_ALSA_VOLUME_ZERO;
+                        pa_log_info("Zeroing volume of %s on path '%s'", buf, p->name);
+                    }
+                }
+            } else if (p->has_volume) {
+                /* We can't use this volume, so let's ignore it */
+                e->volume_use = PA_ALSA_VOLUME_IGNORE;
+                pa_log_info("Ignoring volume of %s on path '%s' (missing dB info)", buf, p->name);
+            }
+            p->has_volume = true;
+        }
+
+        if (e->switch_use == PA_ALSA_SWITCH_MUTE)
+            p->has_mute = true;
+    }
+
+    if (p->has_req_any && !p->req_any_present) {
+        p->supported = false;
+        pa_log_debug("Skipping path '%s', none of required-any elements preset.", p->name);
+        return -1;
+    }
+
+    path_drop_unsupported(p);
+    path_make_options_unique(p);
+    path_create_settings(p);
+
+    p->supported = true;
+
+    p->min_dB = INFINITY;
+    min_dB_set = false;
+    p->max_dB = -INFINITY;
+    max_dB_set = false;
+
+    for (t = 0; t < PA_CHANNEL_POSITION_MAX; t++) {
+        if (path_volume_channels & PA_CHANNEL_POSITION_MASK(t)) {
+            if (p->min_dB > min_dB[t]) {
+                p->min_dB = min_dB[t];
+                min_dB_set = true;
+            }
+
+            if (p->max_dB < max_dB[t]) {
+                p->max_dB = max_dB[t];
+                max_dB_set = true;
+            }
+        }
+    }
+
+    /* this is probably a wrong prediction, but it should be safe */
+    if (!min_dB_set)
+        p->min_dB = -INFINITY;
+    if (!max_dB_set)
+        p->max_dB = 0;
+
+    return 0;
+}
+
+void pa_alsa_setting_dump(pa_alsa_setting *s) {
+    pa_assert(s);
+
+    pa_log_debug("Setting %s (%s) priority=%u",
+                 s->name,
+                 pa_strnull(s->description),
+                 s->priority);
+}
+
+void pa_alsa_jack_dump(pa_alsa_jack *j) {
+    pa_assert(j);
+
+    pa_log_debug("Jack %s, alsa_name='%s', index='%d', detection %s", j->name, j->alsa_id.name, j->alsa_id.index, j->has_control ? "possible" : "unavailable");
+}
+
+void pa_alsa_option_dump(pa_alsa_option *o) {
+    pa_assert(o);
+
+    pa_log_debug("Option %s (%s/%s) index=%i, priority=%u",
+                 o->alsa_name,
+                 pa_strnull(o->name),
+                 pa_strnull(o->description),
+                 o->alsa_idx,
+                 o->priority);
+}
+
+void pa_alsa_element_dump(pa_alsa_element *e) {
+    char buf[64];
+
+    pa_alsa_option *o;
+    pa_assert(e);
+
+    pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+    pa_log_debug("Element %s, direction=%i, switch=%i, volume=%i, volume_limit=%li, enumeration=%i, required=%i, required_any=%i, required_absent=%i, mask=0x%llx, n_channels=%u, override_map=%02x",
+                 buf,
+                 e->direction,
+                 e->switch_use,
+                 e->volume_use,
+                 e->volume_limit,
+                 e->enumeration_use,
+                 e->required,
+                 e->required_any,
+                 e->required_absent,
+                 (long long unsigned) e->merged_mask,
+                 e->n_channels,
+                 e->override_map);
+
+    PA_LLIST_FOREACH(o, e->options)
+        pa_alsa_option_dump(o);
+}
+
+void pa_alsa_path_dump(pa_alsa_path *p) {
+    pa_alsa_element *e;
+    pa_alsa_jack *j;
+    pa_alsa_setting *s;
+    pa_assert(p);
+
+    pa_log_debug("Path %s (%s), direction=%i, priority=%u, probed=%s, supported=%s, has_mute=%s, has_volume=%s, "
+                 "has_dB=%s, min_volume=%li, max_volume=%li, min_dB=%g, max_dB=%g",
+                 p->name,
+                 pa_strnull(p->description),
+                 p->direction,
+                 p->priority,
+                 pa_yes_no(p->probed),
+                 pa_yes_no(p->supported),
+                 pa_yes_no(p->has_mute),
+                 pa_yes_no(p->has_volume),
+                 pa_yes_no(p->has_dB),
+                 p->min_volume, p->max_volume,
+                 p->min_dB, p->max_dB);
+
+    PA_LLIST_FOREACH(e, p->elements)
+        pa_alsa_element_dump(e);
+
+    PA_LLIST_FOREACH(j, p->jacks)
+        pa_alsa_jack_dump(j);
+
+    PA_LLIST_FOREACH(s, p->settings)
+        pa_alsa_setting_dump(s);
+}
+
+static void element_set_callback(pa_alsa_element *e, snd_mixer_t *m, snd_mixer_elem_callback_t cb, void *userdata) {
+    snd_mixer_selem_id_t *sid;
+    snd_mixer_elem_t *me;
+    char buf[64];
+
+    pa_assert(e);
+    pa_assert(m);
+    pa_assert(cb);
+
+    SELEM_INIT(sid, &e->alsa_id);
+    if (!(me = snd_mixer_find_selem(m, sid))) {
+        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &e->alsa_id);
+        pa_log_warn("Element %s seems to have disappeared.", buf);
+        return;
+    }
+
+    snd_mixer_elem_set_callback(me, cb);
+    snd_mixer_elem_set_callback_private(me, userdata);
+}
+
+void pa_alsa_path_set_callback(pa_alsa_path *p, snd_mixer_t *m, snd_mixer_elem_callback_t cb, void *userdata) {
+    pa_alsa_element *e;
+
+    pa_assert(p);
+    pa_assert(m);
+    pa_assert(cb);
+
+    PA_LLIST_FOREACH(e, p->elements)
+        element_set_callback(e, m, cb, userdata);
+}
+
+void pa_alsa_path_set_set_callback(pa_alsa_path_set *ps, snd_mixer_t *m, snd_mixer_elem_callback_t cb, void *userdata) {
+    pa_alsa_path *p;
+    void *state;
+
+    pa_assert(ps);
+    pa_assert(m);
+    pa_assert(cb);
+
+    PA_HASHMAP_FOREACH(p, ps->paths, state)
+        pa_alsa_path_set_callback(p, m, cb, userdata);
+}
+
+static pa_alsa_path *profile_set_get_path(pa_alsa_profile_set *ps, const char *path_name) {
+    pa_alsa_path *path;
+
+    pa_assert(ps);
+    pa_assert(path_name);
+
+    if ((path = pa_hashmap_get(ps->output_paths, path_name)))
+        return path;
+
+    return pa_hashmap_get(ps->input_paths, path_name);
+}
+
+static void profile_set_add_path(pa_alsa_profile_set *ps, pa_alsa_path *path) {
+    pa_assert(ps);
+    pa_assert(path);
+
+    switch (path->direction) {
+        case PA_ALSA_DIRECTION_OUTPUT:
+            pa_assert_se(pa_hashmap_put(ps->output_paths, path->name, path) >= 0);
+            break;
+
+        case PA_ALSA_DIRECTION_INPUT:
+            pa_assert_se(pa_hashmap_put(ps->input_paths, path->name, path) >= 0);
+            break;
+
+        default:
+            pa_assert_not_reached();
+    }
+}
+
+pa_alsa_path_set *pa_alsa_path_set_new(pa_alsa_mapping *m, pa_alsa_direction_t direction, const char *paths_dir) {
+    pa_alsa_path_set *ps;
+    char **pn = NULL, **en = NULL, **ie;
+    pa_alsa_decibel_fix *db_fix;
+    void *state, *state2;
+    char name[64];
+    int index;
+
+    pa_assert(m);
+    pa_assert(m->profile_set);
+    pa_assert(m->profile_set->decibel_fixes);
+    pa_assert(direction == PA_ALSA_DIRECTION_OUTPUT || direction == PA_ALSA_DIRECTION_INPUT);
+
+    if (m->direction != PA_ALSA_DIRECTION_ANY && m->direction != direction)
+        return NULL;
+
+    ps = pa_xnew0(pa_alsa_path_set, 1);
+    ps->direction = direction;
+    ps->paths = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+
+    if (direction == PA_ALSA_DIRECTION_OUTPUT)
+        pn = m->output_path_names;
+    else
+        pn = m->input_path_names;
+
+    if (pn) {
+        char **in;
+
+        for (in = pn; *in; in++) {
+            pa_alsa_path *p = NULL;
+            bool duplicate = false;
+            char **kn;
+
+            for (kn = pn; kn < in; kn++)
+                if (pa_streq(*kn, *in)) {
+                    duplicate = true;
+                    break;
+                }
+
+            if (duplicate)
+                continue;
+
+            p = profile_set_get_path(m->profile_set, *in);
+
+            if (p && p->direction != direction) {
+                pa_log("Configuration error: Path %s is used both as an input and as an output path.", p->name);
+                goto fail;
+            }
+
+            if (!p) {
+                char *fn = pa_sprintf_malloc("%s.conf", *in);
+                p = pa_alsa_path_new(paths_dir, fn, direction);
+                pa_xfree(fn);
+                if (p)
+                    profile_set_add_path(m->profile_set, p);
+            }
+
+            if (p)
+                pa_hashmap_put(ps->paths, p, p);
+
+        }
+
+        goto finish;
+    }
+
+    if (direction == PA_ALSA_DIRECTION_OUTPUT)
+        en = m->output_element;
+    else
+        en = m->input_element;
+
+    if (!en)
+        goto fail;
+
+    for (ie = en; *ie; ie++) {
+        char **je;
+        pa_alsa_path *p;
+
+        p = pa_alsa_path_synthesize(*ie, direction);
+
+        /* Mark all other passed elements for require-absent */
+        for (je = en; *je; je++) {
+            pa_alsa_element *e;
+
+            if (je == ie)
+                continue;
+
+            if (strlen(*je) + 1 >= sizeof(name)) {
+                pa_log("Element identifier %s is too long!", *je);
+                continue;
+            }
+
+            if (alsa_id_decode(*je, name, &index))
+                continue;
+
+            e = pa_xnew0(pa_alsa_element, 1);
+            e->path = p;
+            e->alsa_id.name = pa_xstrdup(name);
+            e->alsa_id.index = index;
+            e->direction = direction;
+            e->required_absent = PA_ALSA_REQUIRED_ANY;
+            e->volume_limit = -1;
+
+            PA_LLIST_INSERT_AFTER(pa_alsa_element, p->elements, p->last_element, e);
+            p->last_element = e;
+        }
+
+        pa_hashmap_put(ps->paths, *ie, p);
+    }
+
+finish:
+    /* Assign decibel fixes to elements. */
+    PA_HASHMAP_FOREACH(db_fix, m->profile_set->decibel_fixes, state) {
+        pa_alsa_path *p;
+
+        PA_HASHMAP_FOREACH(p, ps->paths, state2) {
+            pa_alsa_element *e;
+
+            PA_LLIST_FOREACH(e, p->elements) {
+                if (e->volume_use != PA_ALSA_VOLUME_IGNORE && pa_streq(db_fix->name, e->alsa_id.name) &&
+                    db_fix->index == e->alsa_id.index) {
+                    /* The profile set that contains the dB fix may be freed
+                     * before the element, so we have to copy the dB fix
+                     * object. */
+                    e->db_fix = pa_xnewdup(pa_alsa_decibel_fix, db_fix, 1);
+                    e->db_fix->profile_set = NULL;
+                    e->db_fix->key = pa_xstrdup(db_fix->key);
+                    e->db_fix->name = pa_xstrdup(db_fix->name);
+                    e->db_fix->db_values = pa_xmemdup(db_fix->db_values, (db_fix->max_step - db_fix->min_step + 1) * sizeof(long));
+                }
+            }
+        }
+    }
+
+    return ps;
+
+fail:
+    if (ps)
+        pa_alsa_path_set_free(ps);
+
+    return NULL;
+}
+
+void pa_alsa_path_set_dump(pa_alsa_path_set *ps) {
+    pa_alsa_path *p;
+    void *state;
+    pa_assert(ps);
+
+    pa_log_debug("Path Set %p, direction=%i",
+                 (void*) ps,
+                 ps->direction);
+
+    PA_HASHMAP_FOREACH(p, ps->paths, state)
+        pa_alsa_path_dump(p);
+}
+
+static bool options_have_option(pa_alsa_option *options, const char *alsa_name) {
+    pa_alsa_option *o;
+
+    pa_assert(options);
+    pa_assert(alsa_name);
+
+    PA_LLIST_FOREACH(o, options) {
+        if (pa_streq(o->alsa_name, alsa_name))
+            return true;
+    }
+    return false;
+}
+
+static bool enumeration_is_subset(pa_alsa_option *a_options, pa_alsa_option *b_options) {
+    pa_alsa_option *oa, *ob;
+
+    if (!a_options) return true;
+    if (!b_options) return false;
+
+    /* If there is an option A offers that B does not, then A is not a subset of B. */
+    PA_LLIST_FOREACH(oa, a_options) {
+        bool found = false;
+        PA_LLIST_FOREACH(ob, b_options) {
+            if (pa_streq(oa->alsa_name, ob->alsa_name)) {
+                found = true;
+                break;
+            }
+        }
+        if (!found)
+            return false;
+    }
+    return true;
+}
+
+/**
+ *  Compares two elements to see if a is a subset of b
+ */
+static bool element_is_subset(pa_alsa_element *a, pa_alsa_element *b, snd_mixer_t *m) {
+    char buf[64];
+
+    pa_assert(a);
+    pa_assert(b);
+    pa_assert(m);
+
+    /* General rules:
+     * Every state is a subset of itself (with caveats for volume_limits and options)
+     * IGNORE is a subset of every other state */
+
+    /* Check the volume_use */
+    if (a->volume_use != PA_ALSA_VOLUME_IGNORE) {
+
+        /* "Constant" is subset of "Constant" only when their constant values are equal */
+        if (a->volume_use == PA_ALSA_VOLUME_CONSTANT && b->volume_use == PA_ALSA_VOLUME_CONSTANT && a->constant_volume != b->constant_volume)
+            return false;
+
+        /* Different volume uses when b is not "Merge" means we are definitely not a subset */
+        if (a->volume_use != b->volume_use && b->volume_use != PA_ALSA_VOLUME_MERGE)
+            return false;
+
+        /* "Constant" is a subset of "Merge", if there is not a "volume-limit" in "Merge" below the actual constant.
+         * "Zero" and "Off" are just special cases of "Constant" when comparing to "Merge"
+         * "Merge" with a "volume-limit" is a subset of "Merge" without a "volume-limit" or with a higher "volume-limit" */
+        if (b->volume_use == PA_ALSA_VOLUME_MERGE && b->volume_limit >= 0) {
+            long a_limit;
+
+            if (a->volume_use == PA_ALSA_VOLUME_CONSTANT)
+                a_limit = a->constant_volume;
+            else if (a->volume_use == PA_ALSA_VOLUME_ZERO) {
+                long dB = 0;
+
+                if (a->db_fix) {
+                    int rounding = (a->direction == PA_ALSA_DIRECTION_OUTPUT ? +1 : -1);
+                    a_limit = decibel_fix_get_step(a->db_fix, &dB, rounding);
+                } else {
+                    snd_mixer_selem_id_t *sid;
+                    snd_mixer_elem_t *me;
+
+                    SELEM_INIT(sid, &a->alsa_id);
+                    if (!(me = snd_mixer_find_selem(m, sid))) {
+                        pa_alsa_mixer_id_to_string(buf, sizeof(buf), &a->alsa_id);
+                        pa_log_warn("Element %s seems to have disappeared.", buf);
+                        return false;
+                    }
+
+                    if (a->direction == PA_ALSA_DIRECTION_OUTPUT) {
+                        if (snd_mixer_selem_ask_playback_dB_vol(me, dB, +1, &a_limit) < 0)
+                            return false;
+                    } else {
+                        if (snd_mixer_selem_ask_capture_dB_vol(me, dB, -1, &a_limit) < 0)
+                            return false;
+                    }
+                }
+            } else if (a->volume_use == PA_ALSA_VOLUME_OFF)
+                a_limit = a->min_volume;
+            else if (a->volume_use == PA_ALSA_VOLUME_MERGE)
+                a_limit = a->volume_limit;
+            else
+                pa_assert_not_reached();
+
+            if (a_limit > b->volume_limit)
+                return false;
+        }
+
+        if (a->volume_use == PA_ALSA_VOLUME_MERGE) {
+            int s;
+            /* If override-maps are different, they're not subsets */
+            if (a->n_channels != b->n_channels)
+                return false;
+            for (s = 0; s <= SND_MIXER_SCHN_LAST; s++)
+                if (a->masks[s][a->n_channels-1] != b->masks[s][b->n_channels-1]) {
+                    pa_alsa_mixer_id_to_string(buf, sizeof(buf), &a->alsa_id);
+                    pa_log_debug("Element %s is not a subset - mask a: 0x%" PRIx64 ", mask b: 0x%" PRIx64 ", at channel %d",
+                                 buf, a->masks[s][a->n_channels-1], b->masks[s][b->n_channels-1], s);
+                    return false;
+               }
+        }
+    }
+
+    if (a->switch_use != PA_ALSA_SWITCH_IGNORE) {
+        /* "On" is a subset of "Mute".
+         * "Off" is a subset of "Mute".
+         * "On" is a subset of "Select", if there is an "Option:On" in B.
+         * "Off" is a subset of "Select", if there is an "Option:Off" in B.
+         * "Select" is a subset of "Select", if they have the same options (is this always true?). */
+
+        if (a->switch_use != b->switch_use) {
+
+            if (a->switch_use == PA_ALSA_SWITCH_SELECT || a->switch_use == PA_ALSA_SWITCH_MUTE
+                || b->switch_use == PA_ALSA_SWITCH_OFF || b->switch_use == PA_ALSA_SWITCH_ON)
+                return false;
+
+            if (b->switch_use == PA_ALSA_SWITCH_SELECT) {
+                if (a->switch_use == PA_ALSA_SWITCH_ON) {
+                    if (!options_have_option(b->options, "on"))
+                        return false;
+                } else if (a->switch_use == PA_ALSA_SWITCH_OFF) {
+                    if (!options_have_option(b->options, "off"))
+                        return false;
+                }
+            }
+        } else if (a->switch_use == PA_ALSA_SWITCH_SELECT) {
+            if (!enumeration_is_subset(a->options, b->options))
+                return false;
+        }
+    }
+
+    if (a->enumeration_use != PA_ALSA_ENUMERATION_IGNORE) {
+        if (b->enumeration_use == PA_ALSA_ENUMERATION_IGNORE)
+            return false;
+        if (!enumeration_is_subset(a->options, b->options))
+            return false;
+    }
+
+    return true;
+}
+
+static void path_set_condense(pa_alsa_path_set *ps, snd_mixer_t *m) {
+    pa_alsa_path *p;
+    void *state;
+
+    pa_assert(ps);
+    pa_assert(m);
+
+    /* If we only have one path, then don't bother */
+    if (pa_hashmap_size(ps->paths) < 2)
+        return;
+
+    PA_HASHMAP_FOREACH(p, ps->paths, state) {
+        pa_alsa_path *p2;
+        void *state2;
+
+        PA_HASHMAP_FOREACH(p2, ps->paths, state2) {
+            pa_alsa_element *ea, *eb;
+            pa_alsa_jack *ja, *jb;
+            bool is_subset = true;
+
+            if (p == p2)
+                continue;
+
+            /* If a has a jack that b does not have, a is not a subset */
+            PA_LLIST_FOREACH(ja, p->jacks) {
+                bool exists = false;
+
+                if (!ja->has_control)
+                    continue;
+
+                PA_LLIST_FOREACH(jb, p2->jacks) {
+                    if (jb->has_control && pa_streq(ja->alsa_id.name, jb->alsa_id.name) &&
+                       (ja->alsa_id.index == jb->alsa_id.index) &&
+                       (ja->state_plugged == jb->state_plugged) &&
+                       (ja->state_unplugged == jb->state_unplugged)) {
+                        exists = true;
+                        break;
+                    }
+                }
+
+                if (!exists) {
+                    is_subset = false;
+                    break;
+                }
+            }
+
+            /* Compare the elements of each set... */
+            PA_LLIST_FOREACH(ea, p->elements) {
+                bool found_matching_element = false;
+
+                if (!is_subset)
+                    break;
+
+                PA_LLIST_FOREACH(eb, p2->elements) {
+                    if (pa_streq(ea->alsa_id.name, eb->alsa_id.name) &&
+                        ea->alsa_id.index == eb->alsa_id.index) {
+                        found_matching_element = true;
+                        is_subset = element_is_subset(ea, eb, m);
+                        break;
+                    }
+                }
+
+                if (!found_matching_element)
+                    is_subset = false;
+            }
+
+            if (is_subset) {
+                pa_log_debug("Removing path '%s' as it is a subset of '%s'.", p->name, p2->name);
+                pa_hashmap_remove(ps->paths, p);
+                break;
+            }
+        }
+    }
+}
+
+static pa_alsa_path* path_set_find_path_by_description(pa_alsa_path_set *ps, const char* description, pa_alsa_path *ignore) {
+    pa_alsa_path* p;
+    void *state;
+
+    PA_HASHMAP_FOREACH(p, ps->paths, state)
+        if (p != ignore && pa_streq(p->description, description))
+            return p;
+
+    return NULL;
+}
+
+static void path_set_make_path_descriptions_unique(pa_alsa_path_set *ps) {
+    pa_alsa_path *p, *q;
+    void *state, *state2;
+
+    PA_HASHMAP_FOREACH(p, ps->paths, state) {
+        unsigned i;
+        char *old_description;
+
+        q = path_set_find_path_by_description(ps, p->description, p);
+
+        if (!q)
+            continue;
+
+        old_description = pa_xstrdup(p->description);
+
+        /* OK, this description is not unique, hence let's rename */
+        i = 1;
+        PA_HASHMAP_FOREACH(q, ps->paths, state2) {
+            char *new_description;
+
+            if (!pa_streq(q->description, old_description))
+                continue;
+
+            new_description = pa_sprintf_malloc("%s %u", q->description, i);
+            pa_xfree(q->description);
+            q->description = new_description;
+
+            i++;
+        }
+
+        pa_xfree(old_description);
+    }
+}
+
+void pa_alsa_mapping_free(pa_alsa_mapping *m) {
+    pa_assert(m);
+
+    pa_xfree(m->name);
+    pa_xfree(m->description);
+    pa_xfree(m->description_key);
+
+    pa_proplist_free(m->proplist);
+
+    pa_xstrfreev(m->device_strings);
+    pa_xstrfreev(m->input_path_names);
+    pa_xstrfreev(m->output_path_names);
+    pa_xstrfreev(m->input_element);
+    pa_xstrfreev(m->output_element);
+    if (m->input_path_set)
+        pa_alsa_path_set_free(m->input_path_set);
+    if (m->output_path_set)
+        pa_alsa_path_set_free(m->output_path_set);
+
+    pa_proplist_free(m->input_proplist);
+    pa_proplist_free(m->output_proplist);
+
+    pa_assert(!m->input_pcm);
+    pa_assert(!m->output_pcm);
+
+    pa_alsa_ucm_mapping_context_free(&m->ucm_context);
+
+    pa_xfree(m);
+}
+
+void pa_alsa_profile_free(pa_alsa_profile *p) {
+    pa_assert(p);
+
+    pa_xfree(p->name);
+    pa_xfree(p->description);
+    pa_xfree(p->description_key);
+    pa_xfree(p->input_name);
+    pa_xfree(p->output_name);
+
+    pa_xstrfreev(p->input_mapping_names);
+    pa_xstrfreev(p->output_mapping_names);
+
+    if (p->input_mappings)
+        pa_idxset_free(p->input_mappings, NULL);
+
+    if (p->output_mappings)
+        pa_idxset_free(p->output_mappings, NULL);
+
+    pa_xfree(p);
+}
+
+void pa_alsa_profile_set_free(pa_alsa_profile_set *ps) {
+    pa_assert(ps);
+
+    if (ps->input_paths)
+        pa_hashmap_free(ps->input_paths);
+
+    if (ps->output_paths)
+        pa_hashmap_free(ps->output_paths);
+
+    if (ps->profiles)
+        pa_hashmap_free(ps->profiles);
+
+    if (ps->mappings)
+        pa_hashmap_free(ps->mappings);
+
+    if (ps->decibel_fixes)
+        pa_hashmap_free(ps->decibel_fixes);
+
+    pa_xfree(ps);
+}
+
+pa_alsa_mapping *pa_alsa_mapping_get(pa_alsa_profile_set *ps, const char *name) {
+    pa_alsa_mapping *m;
+
+    if (!pa_startswith(name, "Mapping "))
+        return NULL;
+
+    name += 8;
+
+    if ((m = pa_hashmap_get(ps->mappings, name)))
+        return m;
+
+    m = pa_xnew0(pa_alsa_mapping, 1);
+    m->profile_set = ps;
+    m->exact_channels = true;
+    m->name = pa_xstrdup(name);
+    pa_sample_spec_init(&m->sample_spec);
+    pa_channel_map_init(&m->channel_map);
+    m->proplist = pa_proplist_new();
+    m->hw_device_index = -1;
+    m->input_proplist = pa_proplist_new();
+    m->output_proplist = pa_proplist_new();
+
+    pa_hashmap_put(ps->mappings, m->name, m);
+
+    return m;
+}
+
+static pa_alsa_profile *profile_get(pa_alsa_profile_set *ps, const char *name) {
+    pa_alsa_profile *p;
+
+    if (!pa_startswith(name, "Profile "))
+        return NULL;
+
+    name += 8;
+
+    if ((p = pa_hashmap_get(ps->profiles, name)))
+        return p;
+
+    p = pa_xnew0(pa_alsa_profile, 1);
+    p->profile_set = ps;
+    p->name = pa_xstrdup(name);
+
+    pa_hashmap_put(ps->profiles, p->name, p);
+
+    return p;
+}
+
+static pa_alsa_decibel_fix *decibel_fix_get(pa_alsa_profile_set *ps, const char *alsa_id) {
+    pa_alsa_decibel_fix *db_fix;
+    char *name;
+    int index;
+
+    if (!pa_startswith(alsa_id, "DecibelFix "))
+        return NULL;
+
+    alsa_id += 11;
+
+    if ((db_fix = pa_hashmap_get(ps->decibel_fixes, alsa_id)))
+        return db_fix;
+
+    name = alloca(strlen(alsa_id) + 1);
+    if (alsa_id_decode(alsa_id, name, &index))
+        return NULL;
+
+    db_fix = pa_xnew0(pa_alsa_decibel_fix, 1);
+    db_fix->profile_set = ps;
+    db_fix->name = pa_xstrdup(name);
+    db_fix->index = index;
+    db_fix->key = pa_xstrdup(alsa_id);
+
+    pa_hashmap_put(ps->decibel_fixes, db_fix->key, db_fix);
+
+    return db_fix;
+}
+
+static int mapping_parse_device_strings(pa_config_parser_state *state) {
+    pa_alsa_profile_set *ps;
+    pa_alsa_mapping *m;
+
+    pa_assert(state);
+
+    ps = state->userdata;
+
+    if (!(m = pa_alsa_mapping_get(ps, state->section))) {
+        pa_log("[%s:%u] %s invalid in section %s", state->filename, state->lineno, state->lvalue, state->section);
+        return -1;
+    }
+
+    pa_xstrfreev(m->device_strings);
+    if (!(m->device_strings = pa_split_spaces_strv(state->rvalue))) {
+        pa_log("[%s:%u] Device string list empty of '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    return 0;
+}
+
+static int mapping_parse_channel_map(pa_config_parser_state *state) {
+    pa_alsa_profile_set *ps;
+    pa_alsa_mapping *m;
+
+    pa_assert(state);
+
+    ps = state->userdata;
+
+    if (!(m = pa_alsa_mapping_get(ps, state->section))) {
+        pa_log("[%s:%u] %s invalid in section %s", state->filename, state->lineno, state->lvalue, state->section);
+        return -1;
+    }
+
+    if (!(pa_channel_map_parse(&m->channel_map, state->rvalue))) {
+        pa_log("[%s:%u] Channel map invalid of '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    return 0;
+}
+
+static int mapping_parse_paths(pa_config_parser_state *state) {
+    pa_alsa_profile_set *ps;
+    pa_alsa_mapping *m;
+
+    pa_assert(state);
+
+    ps = state->userdata;
+
+    if (!(m = pa_alsa_mapping_get(ps, state->section))) {
+        pa_log("[%s:%u] %s invalid in section %s", state->filename, state->lineno, state->lvalue, state->section);
+        return -1;
+    }
+
+    if (pa_streq(state->lvalue, "paths-input")) {
+        pa_xstrfreev(m->input_path_names);
+        m->input_path_names = pa_split_spaces_strv(state->rvalue);
+    } else {
+        pa_xstrfreev(m->output_path_names);
+        m->output_path_names = pa_split_spaces_strv(state->rvalue);
+    }
+
+    return 0;
+}
+
+static int mapping_parse_exact_channels(pa_config_parser_state *state) {
+    pa_alsa_profile_set *ps;
+    pa_alsa_mapping *m;
+    int b;
+
+    pa_assert(state);
+
+    ps = state->userdata;
+
+    if (!(m = pa_alsa_mapping_get(ps, state->section))) {
+        pa_log("[%s:%u] %s invalid in section %s", state->filename, state->lineno, state->lvalue, state->section);
+        return -1;
+    }
+
+    if ((b = pa_parse_boolean(state->rvalue)) < 0) {
+        pa_log("[%s:%u] %s has invalid value '%s'", state->filename, state->lineno, state->lvalue, state->section);
+        return -1;
+    }
+
+    m->exact_channels = b;
+
+    return 0;
+}
+
+static int mapping_parse_element(pa_config_parser_state *state) {
+    pa_alsa_profile_set *ps;
+    pa_alsa_mapping *m;
+
+    pa_assert(state);
+
+    ps = state->userdata;
+
+    if (!(m = pa_alsa_mapping_get(ps, state->section))) {
+        pa_log("[%s:%u] %s invalid in section %s", state->filename, state->lineno, state->lvalue, state->section);
+        return -1;
+    }
+
+    if (pa_streq(state->lvalue, "element-input")) {
+        pa_xstrfreev(m->input_element);
+        m->input_element = pa_split_spaces_strv(state->rvalue);
+    } else {
+        pa_xstrfreev(m->output_element);
+        m->output_element = pa_split_spaces_strv(state->rvalue);
+    }
+
+    return 0;
+}
+
+static int mapping_parse_direction(pa_config_parser_state *state) {
+    pa_alsa_profile_set *ps;
+    pa_alsa_mapping *m;
+
+    pa_assert(state);
+
+    ps = state->userdata;
+
+    if (!(m = pa_alsa_mapping_get(ps, state->section))) {
+        pa_log("[%s:%u] Section name %s invalid.", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    if (pa_streq(state->rvalue, "input"))
+        m->direction = PA_ALSA_DIRECTION_INPUT;
+    else if (pa_streq(state->rvalue, "output"))
+        m->direction = PA_ALSA_DIRECTION_OUTPUT;
+    else if (pa_streq(state->rvalue, "any"))
+        m->direction = PA_ALSA_DIRECTION_ANY;
+    else {
+        pa_log("[%s:%u] Direction %s invalid.", state->filename, state->lineno, state->rvalue);
+        return -1;
+    }
+
+    return 0;
+}
+
+static int mapping_parse_description(pa_config_parser_state *state) {
+    pa_alsa_profile_set *ps;
+    pa_alsa_profile *p;
+    pa_alsa_mapping *m;
+
+    pa_assert(state);
+
+    ps = state->userdata;
+
+    if ((m = pa_alsa_mapping_get(ps, state->section))) {
+        pa_xfree(m->description);
+        m->description = pa_xstrdup(_(state->rvalue));
+    } else if ((p = profile_get(ps, state->section))) {
+        pa_xfree(p->description);
+        p->description = pa_xstrdup(_(state->rvalue));
+    } else {
+        pa_log("[%s:%u] Section name %s invalid.", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    return 0;
+}
+
+static int mapping_parse_description_key(pa_config_parser_state *state) {
+    pa_alsa_profile_set *ps;
+    pa_alsa_profile *p;
+    pa_alsa_mapping *m;
+
+    pa_assert(state);
+
+    ps = state->userdata;
+
+    if ((m = pa_alsa_mapping_get(ps, state->section))) {
+        pa_xfree(m->description_key);
+        m->description_key = pa_xstrdup(state->rvalue);
+    } else if ((p = profile_get(ps, state->section))) {
+        pa_xfree(p->description_key);
+        p->description_key = pa_xstrdup(state->rvalue);
+    } else {
+        pa_log("[%s:%u] Section name %s invalid.", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    return 0;
+}
+
+
+static int mapping_parse_priority(pa_config_parser_state *state) {
+    pa_alsa_profile_set *ps;
+    pa_alsa_profile *p;
+    pa_alsa_mapping *m;
+    uint32_t prio;
+
+    pa_assert(state);
+
+    ps = state->userdata;
+
+    if (pa_atou(state->rvalue, &prio) < 0) {
+        pa_log("[%s:%u] Priority invalid of '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    if ((m = pa_alsa_mapping_get(ps, state->section)))
+        m->priority = prio;
+    else if ((p = profile_get(ps, state->section)))
+        p->priority = prio;
+    else {
+        pa_log("[%s:%u] Section name %s invalid.", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    return 0;
+}
+
+static int mapping_parse_fallback(pa_config_parser_state *state) {
+    pa_alsa_profile_set *ps;
+    pa_alsa_profile *p;
+    pa_alsa_mapping *m;
+    int k;
+
+    pa_assert(state);
+
+    ps = state->userdata;
+
+    if ((k = pa_parse_boolean(state->rvalue)) < 0) {
+        pa_log("[%s:%u] Fallback invalid of '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    if ((m = pa_alsa_mapping_get(ps, state->section)))
+        m->fallback = k;
+    else if ((p = profile_get(ps, state->section)))
+        p->fallback_input = p->fallback_output = k;
+    else {
+        pa_log("[%s:%u] Section name %s invalid.", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    return 0;
+}
+
+static int mapping_parse_intended_roles(pa_config_parser_state *state) {
+    pa_alsa_profile_set *ps;
+    pa_alsa_mapping *m;
+
+    pa_assert(state);
+
+    ps = state->userdata;
+
+    if (!(m = pa_alsa_mapping_get(ps, state->section))) {
+        pa_log("[%s:%u] %s invalid in section %s", state->filename, state->lineno, state->lvalue, state->section);
+        return -1;
+    }
+
+    pa_proplist_sets(m->proplist, PA_PROP_DEVICE_INTENDED_ROLES, state->rvalue);
+
+    return 0;
+}
+
+
+static int profile_parse_mappings(pa_config_parser_state *state) {
+    pa_alsa_profile_set *ps;
+    pa_alsa_profile *p;
+
+    pa_assert(state);
+
+    ps = state->userdata;
+
+    if (!(p = profile_get(ps, state->section))) {
+        pa_log("[%s:%u] %s invalid in section %s", state->filename, state->lineno, state->lvalue, state->section);
+        return -1;
+    }
+
+    if (pa_streq(state->lvalue, "input-mappings")) {
+        pa_xstrfreev(p->input_mapping_names);
+        p->input_mapping_names = pa_split_spaces_strv(state->rvalue);
+    } else {
+        pa_xstrfreev(p->output_mapping_names);
+        p->output_mapping_names = pa_split_spaces_strv(state->rvalue);
+    }
+
+    return 0;
+}
+
+static int profile_parse_skip_probe(pa_config_parser_state *state) {
+    pa_alsa_profile_set *ps;
+    pa_alsa_profile *p;
+    int b;
+
+    pa_assert(state);
+
+    ps = state->userdata;
+
+    if (!(p = profile_get(ps, state->section))) {
+        pa_log("[%s:%u] %s invalid in section %s", state->filename, state->lineno, state->lvalue, state->section);
+        return -1;
+    }
+
+    if ((b = pa_parse_boolean(state->rvalue)) < 0) {
+        pa_log("[%s:%u] Skip probe invalid of '%s'", state->filename, state->lineno, state->section);
+        return -1;
+    }
+
+    p->supported = b;
+
+    return 0;
+}
+
+static int decibel_fix_parse_db_values(pa_config_parser_state *state) {
+    pa_alsa_profile_set *ps;
+    pa_alsa_decibel_fix *db_fix;
+    char **items;
+    char *item;
+    long *db_values;
+    unsigned n = 8; /* Current size of the db_values table. */
+    unsigned min_step = 0;
+    unsigned max_step = 0;
+    unsigned i = 0; /* Index to the items table. */
+    unsigned prev_step = 0;
+    double prev_db = 0;
+
+    pa_assert(state);
+
+    ps = state->userdata;
+
+    if (!(db_fix = decibel_fix_get(ps, state->section))) {
+        pa_log("[%s:%u] %s invalid in section %s", state->filename, state->lineno, state->lvalue, state->section);
+        return -1;
+    }
+
+    if (!(items = pa_split_spaces_strv(state->rvalue))) {
+        pa_log("[%s:%u] Value missing", state->filename, state->lineno);
+        return -1;
+    }
+
+    db_values = pa_xnew(long, n);
+
+    while ((item = items[i++])) {
+        char *s = item; /* Step value string. */
+        char *d = item; /* dB value string. */
+        uint32_t step;
+        double db;
+
+        /* Move d forward until it points to a colon or to the end of the item. */
+        for (; *d && *d != ':'; ++d);
+
+        if (d == s) {
+            /* item started with colon. */
+            pa_log("[%s:%u] No step value found in %s", state->filename, state->lineno, item);
+            goto fail;
+        }
+
+        if (!*d || !*(d + 1)) {
+            /* No colon found, or it was the last character in item. */
+            pa_log("[%s:%u] No dB value found in %s", state->filename, state->lineno, item);
+            goto fail;
+        }
+
+        /* pa_atou() needs a null-terminating string. Let's replace the colon
+         * with a zero byte. */
+        *d++ = '\0';
+
+        if (pa_atou(s, &step) < 0) {
+            pa_log("[%s:%u] Invalid step value: %s", state->filename, state->lineno, s);
+            goto fail;
+        }
+
+        if (pa_atod(d, &db) < 0) {
+            pa_log("[%s:%u] Invalid dB value: %s", state->filename, state->lineno, d);
+            goto fail;
+        }
+
+        if (step <= prev_step && i != 1) {
+            pa_log("[%s:%u] Step value %u not greater than the previous value %u", state->filename, state->lineno, step, prev_step);
+            goto fail;
+        }
+
+        if (db < prev_db && i != 1) {
+            pa_log("[%s:%u] Decibel value %0.2f less than the previous value %0.2f", state->filename, state->lineno, db, prev_db);
+            goto fail;
+        }
+
+        if (i == 1) {
+            min_step = step;
+            db_values[0] = (long) (db * 100.0);
+            prev_step = step;
+            prev_db = db;
+        } else {
+            /* Interpolate linearly. */
+            double db_increment = (db - prev_db) / (step - prev_step);
+
+            for (; prev_step < step; ++prev_step, prev_db += db_increment) {
+
+                /* Reallocate the db_values table if it's about to overflow. */
+                if (prev_step + 1 - min_step == n) {
+                    n *= 2;
+                    db_values = pa_xrenew(long, db_values, n);
+                }
+
+                db_values[prev_step + 1 - min_step] = (long) ((prev_db + db_increment) * 100.0);
+            }
+        }
+
+        max_step = step;
+    }
+
+    db_fix->min_step = min_step;
+    db_fix->max_step = max_step;
+    pa_xfree(db_fix->db_values);
+    db_fix->db_values = db_values;
+
+    pa_xstrfreev(items);
+
+    return 0;
+
+fail:
+    pa_xstrfreev(items);
+    pa_xfree(db_values);
+
+    return -1;
+}
+
+/* the logic is simple: if we see the jack in multiple paths */
+/* assign all those paths to one availability_group */
+static void profile_set_set_availability_groups(pa_alsa_profile_set *ps) {
+    pa_dynarray *paths;
+    pa_alsa_path *p;
+    void *state;
+    unsigned idx1;
+    uint32_t num = 1;
+
+    /* Merge ps->input_paths and ps->output_paths into one dynarray. */
+    paths = pa_dynarray_new(NULL);
+    PA_HASHMAP_FOREACH(p, ps->input_paths, state)
+        pa_dynarray_append(paths, p);
+    PA_HASHMAP_FOREACH(p, ps->output_paths, state)
+        pa_dynarray_append(paths, p);
+
+    PA_DYNARRAY_FOREACH(p, paths, idx1) {
+        pa_alsa_jack *j;
+        const char *found = NULL;
+        bool has_control = false;
+
+        PA_LLIST_FOREACH(j, p->jacks) {
+            pa_alsa_path *p2;
+            unsigned idx2;
+
+            if (!j->has_control || j->state_plugged == PA_AVAILABLE_NO)
+                continue;
+            has_control = true;
+            PA_DYNARRAY_FOREACH(p2, paths, idx2) {
+                pa_alsa_jack *j2;
+
+                if (p2 == p)
+                    break;
+                PA_LLIST_FOREACH(j2, p2->jacks) {
+                    if (!j2->has_control || j2->state_plugged == PA_AVAILABLE_NO)
+                        continue;
+                    if (pa_streq(j->alsa_id.name, j2->alsa_id.name) &&
+                        j->alsa_id.index == j2->alsa_id.index) {
+                        j->state_plugged = PA_AVAILABLE_UNKNOWN;
+                        j2->state_plugged = PA_AVAILABLE_UNKNOWN;
+                        found = p2->availability_group;
+                        break;
+                    }
+                }
+            }
+            if (found)
+                break;
+        }
+        if (!has_control)
+            continue;
+        if (!found) {
+            p->availability_group = pa_sprintf_malloc("Legacy %d", num);
+        } else {
+            p->availability_group = pa_xstrdup(found);
+        }
+        if (!found)
+            num++;
+    }
+
+    pa_dynarray_free(paths);
+}
+
+static void mapping_paths_probe(pa_alsa_mapping *m, pa_alsa_profile *profile,
+                                pa_alsa_direction_t direction, pa_hashmap *used_paths,
+                                pa_hashmap *mixers) {
+
+    pa_alsa_path *p;
+    void *state;
+    snd_pcm_t *pcm_handle;
+    pa_alsa_path_set *ps;
+    snd_mixer_t *mixer_handle;
+
+    if (direction == PA_ALSA_DIRECTION_OUTPUT) {
+        if (m->output_path_set)
+            return; /* Already probed */
+        m->output_path_set = ps = pa_alsa_path_set_new(m, direction, NULL); /* FIXME: Handle paths_dir */
+        pcm_handle = m->output_pcm;
+    } else {
+        if (m->input_path_set)
+            return; /* Already probed */
+        m->input_path_set = ps = pa_alsa_path_set_new(m, direction, NULL); /* FIXME: Handle paths_dir */
+        pcm_handle = m->input_pcm;
+    }
+
+    if (!ps)
+        return; /* No paths */
+
+    pa_assert(pcm_handle);
+
+    mixer_handle = pa_alsa_open_mixer_for_pcm(mixers, pcm_handle, true);
+    if (!mixer_handle) {
+        /* Cannot open mixer, remove all entries */
+        pa_hashmap_remove_all(ps->paths);
+        return;
+    }
+
+    PA_HASHMAP_FOREACH(p, ps->paths, state) {
+        if (p->autodetect_eld_device)
+            p->eld_device = m->hw_device_index;
+
+        if (pa_alsa_path_probe(p, m, mixer_handle, m->profile_set->ignore_dB) < 0)
+            pa_hashmap_remove(ps->paths, p);
+    }
+
+    path_set_condense(ps, mixer_handle);
+    path_set_make_path_descriptions_unique(ps);
+
+    PA_HASHMAP_FOREACH(p, ps->paths, state)
+        pa_hashmap_put(used_paths, p, p);
+
+    pa_log_debug("Available mixer paths (after tidying):");
+    pa_alsa_path_set_dump(ps);
+}
+
+static int mapping_verify(pa_alsa_mapping *m, const pa_channel_map *bonus) {
+
+    static const struct description_map well_known_descriptions[] = {
+        { "analog-mono",            N_("Analog Mono") },
+        { "analog-mono-left",       N_("Analog Mono (Left)") },
+        { "analog-mono-right",      N_("Analog Mono (Right)") },
+        { "analog-stereo",          N_("Analog Stereo") },
+        { "mono-fallback",          N_("Mono") },
+        { "stereo-fallback",        N_("Stereo") },
+        /* Note: Not translated to "Analog Stereo Input", because the source
+         * name gets "Input" appended to it automatically, so adding "Input"
+         * here would lead to the source name to become "Analog Stereo Input
+         * Input". The same logic applies to analog-stereo-output,
+         * multichannel-input and multichannel-output. */
+        { "analog-stereo-input",    N_("Analog Stereo") },
+        { "analog-stereo-output",   N_("Analog Stereo") },
+        { "analog-stereo-headset",  N_("Headset") },
+        { "analog-stereo-speakerphone",  N_("Speakerphone") },
+        { "multichannel-input",     N_("Multichannel") },
+        { "multichannel-output",    N_("Multichannel") },
+        { "analog-surround-21",     N_("Analog Surround 2.1") },
+        { "analog-surround-30",     N_("Analog Surround 3.0") },
+        { "analog-surround-31",     N_("Analog Surround 3.1") },
+        { "analog-surround-40",     N_("Analog Surround 4.0") },
+        { "analog-surround-41",     N_("Analog Surround 4.1") },
+        { "analog-surround-50",     N_("Analog Surround 5.0") },
+        { "analog-surround-51",     N_("Analog Surround 5.1") },
+        { "analog-surround-61",     N_("Analog Surround 6.0") },
+        { "analog-surround-61",     N_("Analog Surround 6.1") },
+        { "analog-surround-70",     N_("Analog Surround 7.0") },
+        { "analog-surround-71",     N_("Analog Surround 7.1") },
+        { "iec958-stereo",          N_("Digital Stereo (IEC958)") },
+        { "iec958-ac3-surround-40", N_("Digital Surround 4.0 (IEC958/AC3)") },
+        { "iec958-ac3-surround-51", N_("Digital Surround 5.1 (IEC958/AC3)") },
+        { "iec958-dts-surround-51", N_("Digital Surround 5.1 (IEC958/DTS)") },
+        { "hdmi-stereo",            N_("Digital Stereo (HDMI)") },
+        { "hdmi-surround-51",       N_("Digital Surround 5.1 (HDMI)") },
+        { "gaming-headset-chat",    N_("Chat") },
+        { "gaming-headset-game",    N_("Game") },
+    };
+    const char *description_key = m->description_key ? m->description_key : m->name;
+
+    pa_assert(m);
+
+    if (!pa_channel_map_valid(&m->channel_map)) {
+        pa_log("Mapping %s is missing channel map.", m->name);
+        return -1;
+    }
+
+    if (!m->device_strings) {
+        pa_log("Mapping %s is missing device strings.", m->name);
+        return -1;
+    }
+
+    if ((m->input_path_names && m->input_element) ||
+        (m->output_path_names && m->output_element)) {
+        pa_log("Mapping %s must have either mixer path or mixer element, not both.", m->name);
+        return -1;
+    }
+
+    if (!m->description)
+        m->description = pa_xstrdup(lookup_description(description_key,
+                                                       well_known_descriptions,
+                                                       PA_ELEMENTSOF(well_known_descriptions)));
+
+    if (!m->description)
+        m->description = pa_xstrdup(m->name);
+
+    if (bonus) {
+        if (pa_channel_map_equal(&m->channel_map, bonus))
+            m->priority += 50;
+        else if (m->channel_map.channels == bonus->channels)
+            m->priority += 30;
+    }
+
+    return 0;
+}
+
+void pa_alsa_mapping_dump(pa_alsa_mapping *m) {
+    char cm[PA_CHANNEL_MAP_SNPRINT_MAX];
+
+    pa_assert(m);
+
+    pa_log_debug("Mapping %s (%s), priority=%u, channel_map=%s, supported=%s, direction=%i",
+                 m->name,
+                 pa_strnull(m->description),
+                 m->priority,
+                 pa_channel_map_snprint(cm, sizeof(cm), &m->channel_map),
+                 pa_yes_no(m->supported),
+                 m->direction);
+}
+
+static void profile_set_add_auto_pair(
+        pa_alsa_profile_set *ps,
+        pa_alsa_mapping *m, /* output */
+        pa_alsa_mapping *n  /* input */) {
+
+    char *name;
+    pa_alsa_profile *p;
+
+    pa_assert(ps);
+    pa_assert(m || n);
+
+    if (m && m->direction == PA_ALSA_DIRECTION_INPUT)
+        return;
+
+    if (n && n->direction == PA_ALSA_DIRECTION_OUTPUT)
+        return;
+
+    if (m && n)
+        name = pa_sprintf_malloc("output:%s+input:%s", m->name, n->name);
+    else if (m)
+        name = pa_sprintf_malloc("output:%s", m->name);
+    else
+        name = pa_sprintf_malloc("input:%s", n->name);
+
+    if (pa_hashmap_get(ps->profiles, name)) {
+        pa_xfree(name);
+        return;
+    }
+
+    p = pa_xnew0(pa_alsa_profile, 1);
+    p->profile_set = ps;
+    p->name = name;
+
+    if (m) {
+        p->output_name = pa_xstrdup(m->name);
+        p->output_mappings = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+        pa_idxset_put(p->output_mappings, m, NULL);
+        p->priority += m->priority * 100;
+        p->fallback_output = m->fallback;
+    }
+
+    if (n) {
+        p->input_name = pa_xstrdup(n->name);
+        p->input_mappings = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+        pa_idxset_put(p->input_mappings, n, NULL);
+        p->priority += n->priority;
+        p->fallback_input = n->fallback;
+    }
+
+    pa_hashmap_put(ps->profiles, p->name, p);
+}
+
+static void profile_set_add_auto(pa_alsa_profile_set *ps) {
+    pa_alsa_mapping *m, *n;
+    void *m_state, *n_state;
+
+    pa_assert(ps);
+
+    /* The order is important here:
+       1) try single inputs and outputs before trying their
+          combination, because if the half-duplex test failed, we don't have
+          to try full duplex.
+       2) try the output right before the input combinations with
+          that output, because then the output_pcm is not closed between tests.
+    */
+    PA_HASHMAP_FOREACH(n, ps->mappings, n_state)
+        profile_set_add_auto_pair(ps, NULL, n);
+
+    PA_HASHMAP_FOREACH(m, ps->mappings, m_state) {
+        profile_set_add_auto_pair(ps, m, NULL);
+
+        PA_HASHMAP_FOREACH(n, ps->mappings, n_state)
+            profile_set_add_auto_pair(ps, m, n);
+    }
+
+}
+
+static int profile_verify(pa_alsa_profile *p) {
+
+    static const struct description_map well_known_descriptions[] = {
+        { "output:analog-mono+input:analog-mono",     N_("Analog Mono Duplex") },
+        { "output:analog-stereo+input:analog-stereo", N_("Analog Stereo Duplex") },
+        { "output:analog-stereo-headset+input:analog-stereo-headset", N_("Headset") },
+        { "output:analog-stereo-speakerphone+input:analog-stereo-speakerphone", N_("Speakerphone") },
+        { "output:iec958-stereo+input:iec958-stereo", N_("Digital Stereo Duplex (IEC958)") },
+        { "output:multichannel-output+input:multichannel-input", N_("Multichannel Duplex") },
+        { "output:unknown-stereo+input:unknown-stereo", N_("Stereo Duplex") },
+        { "output:analog-output-surround71+output:analog-output-chat+input:analog-input", N_("Mono Chat + 7.1 Surround") },
+        { "off",                                      N_("Off") }
+    };
+    const char *description_key = p->description_key ? p->description_key : p->name;
+
+    pa_assert(p);
+
+    /* Replace the output mapping names by the actual mappings */
+    if (p->output_mapping_names) {
+        char **name;
+
+        pa_assert(!p->output_mappings);
+        p->output_mappings = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+
+        for (name = p->output_mapping_names; *name; name++) {
+            pa_alsa_mapping *m;
+            char **in;
+            bool duplicate = false;
+
+            for (in = name + 1; *in; in++)
+                if (pa_streq(*name, *in)) {
+                    duplicate = true;
+                    break;
+                }
+
+            if (duplicate)
+                continue;
+
+            if (!(m = pa_hashmap_get(p->profile_set->mappings, *name)) || m->direction == PA_ALSA_DIRECTION_INPUT) {
+                pa_log("Profile '%s' refers to nonexistent mapping '%s'.", p->name, *name);
+                return -1;
+            }
+
+            pa_idxset_put(p->output_mappings, m, NULL);
+
+            if (p->supported)
+                m->supported++;
+        }
+
+        pa_xstrfreev(p->output_mapping_names);
+        p->output_mapping_names = NULL;
+    }
+
+    /* Replace the input mapping names by the actual mappings */
+    if (p->input_mapping_names) {
+        char **name;
+
+        pa_assert(!p->input_mappings);
+        p->input_mappings = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+
+        for (name = p->input_mapping_names; *name; name++) {
+            pa_alsa_mapping *m;
+            char **in;
+            bool duplicate = false;
+
+            for (in = name + 1; *in; in++)
+                if (pa_streq(*name, *in)) {
+                    duplicate = true;
+                    break;
+                }
+
+            if (duplicate)
+                continue;
+
+            if (!(m = pa_hashmap_get(p->profile_set->mappings, *name)) || m->direction == PA_ALSA_DIRECTION_OUTPUT) {
+                pa_log("Profile '%s' refers to nonexistent mapping '%s'.", p->name, *name);
+                return -1;
+            }
+
+            pa_idxset_put(p->input_mappings, m, NULL);
+
+            if (p->supported)
+                m->supported++;
+        }
+
+        pa_xstrfreev(p->input_mapping_names);
+        p->input_mapping_names = NULL;
+    }
+
+    if (!p->input_mappings && !p->output_mappings) {
+        pa_log("Profile '%s' lacks mappings.", p->name);
+        return -1;
+    }
+
+    if (!p->description)
+        p->description = pa_xstrdup(lookup_description(description_key,
+                                                       well_known_descriptions,
+                                                       PA_ELEMENTSOF(well_known_descriptions)));
+
+    if (!p->description) {
+        uint32_t idx;
+        pa_alsa_mapping *m;
+	char *ptr;
+	size_t size;
+	FILE *f;
+	int count = 0;
+
+	f = open_memstream(&ptr, &size);
+	if (f == NULL) {
+            pa_log("failed to open memstream: %m");
+            return -1;
+	}
+
+        if (p->output_mappings)
+            PA_IDXSET_FOREACH(m, p->output_mappings, idx) {
+                if (count++ > 0)
+                    fprintf(f, " + ");
+                fprintf(f, _("%s Output"), m->description);
+            }
+
+        if (p->input_mappings)
+            PA_IDXSET_FOREACH(m, p->input_mappings, idx) {
+                if (count++ > 0)
+                    fprintf(f, " + ");
+                fprintf(f, _("%s Input"), m->description);
+            }
+
+	fclose(f);
+        p->description = ptr;
+    }
+
+    return 0;
+}
+
+void pa_alsa_profile_dump(pa_alsa_profile *p) {
+    uint32_t idx;
+    pa_alsa_mapping *m;
+    pa_assert(p);
+
+    pa_log_debug("Profile %s (%s), input=%s, output=%s priority=%u, supported=%s n_input_mappings=%u, n_output_mappings=%u",
+                 p->name,
+                 pa_strnull(p->description),
+                 pa_strnull(p->input_name),
+                 pa_strnull(p->output_name),
+                 p->priority,
+                 pa_yes_no(p->supported),
+                 p->input_mappings ? pa_idxset_size(p->input_mappings) : 0,
+                 p->output_mappings ? pa_idxset_size(p->output_mappings) : 0);
+
+    if (p->input_mappings)
+        PA_IDXSET_FOREACH(m, p->input_mappings, idx)
+            pa_log_debug("Input %s", m->name);
+
+    if (p->output_mappings)
+        PA_IDXSET_FOREACH(m, p->output_mappings, idx)
+            pa_log_debug("Output %s", m->name);
+}
+
+static int decibel_fix_verify(pa_alsa_decibel_fix *db_fix) {
+    pa_assert(db_fix);
+
+    /* Check that the dB mapping has been configured. Since "db-values" is
+     * currently the only option in the DecibelFix section, and decibel fix
+     * objects don't get created if a DecibelFix section is empty, this is
+     * actually a redundant check. Having this may prevent future bugs,
+     * however. */
+    if (!db_fix->db_values) {
+        pa_log("Decibel fix for element %s lacks the dB values.", db_fix->name);
+        return -1;
+    }
+
+    return 0;
+}
+
+void pa_alsa_decibel_fix_dump(pa_alsa_decibel_fix *db_fix) {
+    char *db_values = NULL;
+
+    pa_assert(db_fix);
+
+    if (db_fix->db_values) {
+        unsigned long i, nsteps;
+	FILE *f;
+	char *ptr;
+	size_t size;
+
+	f = open_memstream(&ptr, &size);
+	if (f == NULL)
+		return;
+
+        pa_assert(db_fix->min_step <= db_fix->max_step);
+        nsteps = db_fix->max_step - db_fix->min_step + 1;
+
+        for (i = 0; i < nsteps; ++i)
+            fprintf(f, "[%li]:%0.2f ", i + db_fix->min_step, db_fix->db_values[i] / 100.0);
+
+	fclose(f);
+        db_values = ptr;
+    }
+
+    pa_log_debug("Decibel fix %s, min_step=%li, max_step=%li, db_values=%s",
+                 db_fix->name, db_fix->min_step, db_fix->max_step, pa_strnull(db_values));
+
+    pa_xfree(db_values);
+}
+
+static const char *get_default_profile_dir(void) {
+    const char *str;
+#ifdef HAVE_RUNNING_FROM_BUILD_TREE
+    if (pa_run_from_build_tree())
+        return PA_SRCDIR "mixer/profile-sets";
+    else
+#endif
+    if (getenv("ACP_BUILDDIR") != NULL)
+        return "mixer/profile-sets";
+    if ((str = getenv("ACP_PROFILES_DIR")) != NULL)
+        return str;
+    return PA_ALSA_PROFILE_SETS_DIR;
+}
+
+pa_alsa_profile_set* pa_alsa_profile_set_new(const char *fname, const pa_channel_map *bonus) {
+    pa_alsa_profile_set *ps;
+    pa_alsa_profile *p;
+    pa_alsa_mapping *m;
+    pa_alsa_decibel_fix *db_fix;
+    char *fn;
+    int r;
+    void *state;
+
+    static pa_config_item items[] = {
+        /* [General] */
+        { "auto-profiles",          pa_config_parse_bool,         NULL, "General" },
+
+        /* [Mapping ...] */
+        { "device-strings",         mapping_parse_device_strings, NULL, NULL },
+        { "channel-map",            mapping_parse_channel_map,    NULL, NULL },
+        { "paths-input",            mapping_parse_paths,          NULL, NULL },
+        { "paths-output",           mapping_parse_paths,          NULL, NULL },
+        { "element-input",          mapping_parse_element,        NULL, NULL },
+        { "element-output",         mapping_parse_element,        NULL, NULL },
+        { "direction",              mapping_parse_direction,      NULL, NULL },
+        { "exact-channels",         mapping_parse_exact_channels, NULL, NULL },
+        { "intended-roles",         mapping_parse_intended_roles, NULL, NULL },
+
+        /* Shared by [Mapping ...] and [Profile ...] */
+        { "description",            mapping_parse_description,    NULL, NULL },
+        { "description-key",        mapping_parse_description_key,NULL, NULL },
+        { "priority",               mapping_parse_priority,       NULL, NULL },
+        { "fallback",               mapping_parse_fallback,       NULL, NULL },
+
+        /* [Profile ...] */
+        { "input-mappings",         profile_parse_mappings,       NULL, NULL },
+        { "output-mappings",        profile_parse_mappings,       NULL, NULL },
+        { "skip-probe",             profile_parse_skip_probe,     NULL, NULL },
+
+        /* [DecibelFix ...] */
+        { "db-values",              decibel_fix_parse_db_values,  NULL, NULL },
+        { NULL, NULL, NULL, NULL }
+    };
+
+    ps = pa_xnew0(pa_alsa_profile_set, 1);
+    ps->mappings = pa_hashmap_new_full(pa_idxset_string_hash_func, pa_idxset_string_compare_func, NULL, (pa_free_cb_t) pa_alsa_mapping_free);
+    ps->profiles = pa_hashmap_new_full(pa_idxset_string_hash_func, pa_idxset_string_compare_func, NULL, (pa_free_cb_t) pa_alsa_profile_free);
+    ps->decibel_fixes = pa_hashmap_new_full(pa_idxset_string_hash_func, pa_idxset_string_compare_func, NULL, (pa_free_cb_t) decibel_fix_free);
+    ps->input_paths = pa_hashmap_new_full(pa_idxset_string_hash_func, pa_idxset_string_compare_func, NULL, (pa_free_cb_t) pa_alsa_path_free);
+    ps->output_paths = pa_hashmap_new_full(pa_idxset_string_hash_func, pa_idxset_string_compare_func, NULL, (pa_free_cb_t) pa_alsa_path_free);
+
+    items[0].data = &ps->auto_profiles;
+
+    fn = pa_maybe_prefix_path(fname ? fname : "default.conf",
+		    get_default_profile_dir());
+    if ((r = access(fn, R_OK)) != 0) {
+        if (fname != NULL) {
+            pa_log_warn("profile-set '%s' can't be accessed: %m", fn);
+            fn = pa_maybe_prefix_path("default.conf",
+			    get_default_profile_dir());
+            r = access(fn, R_OK);
+	}
+	if (r != 0) {
+            pa_log_warn("profile-set '%s' can't be accessed: %m", fn);
+	}
+    }
+    r = pa_config_parse(fn, NULL, items, NULL, false, ps);
+    pa_xfree(fn);
+
+    if (r < 0)
+        goto fail;
+
+    PA_HASHMAP_FOREACH(m, ps->mappings, state)
+        if (mapping_verify(m, bonus) < 0)
+            goto fail;
+
+    if (ps->auto_profiles)
+        profile_set_add_auto(ps);
+
+    PA_HASHMAP_FOREACH(p, ps->profiles, state)
+        if (profile_verify(p) < 0)
+            goto fail;
+
+    PA_HASHMAP_FOREACH(db_fix, ps->decibel_fixes, state)
+        if (decibel_fix_verify(db_fix) < 0)
+            goto fail;
+
+    return ps;
+
+fail:
+    pa_alsa_profile_set_free(ps);
+    return NULL;
+}
+
+static void profile_finalize_probing(pa_alsa_profile *to_be_finalized, pa_alsa_profile *next) {
+    pa_alsa_mapping *m;
+    uint32_t idx;
+
+    if (!to_be_finalized)
+        return;
+
+    if (to_be_finalized->output_mappings)
+        PA_IDXSET_FOREACH(m, to_be_finalized->output_mappings, idx) {
+
+            if (!m->output_pcm)
+                continue;
+
+            if (to_be_finalized->supported)
+                m->supported++;
+
+            /* If this mapping is also in the next profile, we won't close the
+             * pcm handle here, because it would get immediately reopened
+             * anyway. */
+            if (next && next->output_mappings && pa_idxset_get_by_data(next->output_mappings, m, NULL))
+                continue;
+
+            pa_alsa_init_proplist_pcm(NULL, m->output_proplist, m->output_pcm);
+            pa_alsa_close(&m->output_pcm);
+        }
+
+    if (to_be_finalized->input_mappings)
+        PA_IDXSET_FOREACH(m, to_be_finalized->input_mappings, idx) {
+
+            if (!m->input_pcm)
+                continue;
+
+            if (to_be_finalized->supported)
+                m->supported++;
+
+            /* If this mapping is also in the next profile, we won't close the
+             * pcm handle here, because it would get immediately reopened
+             * anyway. */
+            if (next && next->input_mappings && pa_idxset_get_by_data(next->input_mappings, m, NULL))
+                continue;
+
+            pa_alsa_init_proplist_pcm(NULL, m->input_proplist, m->input_pcm);
+            pa_alsa_close(&m->input_pcm);
+        }
+}
+
+static snd_pcm_t* mapping_open_pcm(pa_alsa_mapping *m,
+                                   const pa_sample_spec *ss,
+                                   const char *dev_id,
+                                   bool exact_channels,
+                                   int mode,
+                                   unsigned default_n_fragments,
+                                   unsigned default_fragment_size_msec) {
+
+    snd_pcm_t* handle;
+    pa_sample_spec try_ss = *ss;
+    pa_channel_map try_map = m->channel_map;
+    snd_pcm_uframes_t try_period_size, try_buffer_size;
+
+    try_ss.channels = try_map.channels;
+
+    try_period_size =
+        pa_usec_to_bytes(default_fragment_size_msec * PA_USEC_PER_MSEC, &try_ss) /
+        pa_frame_size(&try_ss);
+    try_buffer_size = default_n_fragments * try_period_size;
+
+    handle = pa_alsa_open_by_template(
+                              m->device_strings, dev_id, NULL, &try_ss,
+                              &try_map, mode, &try_period_size,
+                              &try_buffer_size, 0, NULL, NULL, exact_channels);
+    if (handle && !exact_channels && m->channel_map.channels != try_map.channels) {
+        char buf[PA_CHANNEL_MAP_SNPRINT_MAX];
+        pa_log_debug("Channel map for mapping '%s' permanently changed to '%s'", m->name,
+                     pa_channel_map_snprint(buf, sizeof(buf), &try_map));
+        m->channel_map = try_map;
+    }
+    return handle;
+}
+
+static void paths_drop_unused(pa_hashmap* h, pa_hashmap *keep) {
+
+    void* state = NULL;
+    const void* key;
+    pa_alsa_path* p;
+
+    pa_assert(h);
+    pa_assert(keep);
+
+    p = pa_hashmap_iterate(h, &state, &key);
+    while (p) {
+        if (pa_hashmap_get(keep, p) == NULL)
+            pa_hashmap_remove_and_free(h, key);
+        p = pa_hashmap_iterate(h, &state, &key);
+    }
+}
+
+static int add_profiles_to_probe(
+        pa_alsa_profile **list,
+        pa_hashmap *profiles,
+        bool fallback_output,
+        bool fallback_input) {
+
+    int i = 0;
+    void *state;
+    pa_alsa_profile *p;
+    PA_HASHMAP_FOREACH(p, profiles, state)
+        if (p->fallback_input == fallback_input && p->fallback_output == fallback_output) {
+            *list = p;
+            list++;
+            i++;
+        }
+    return i;
+}
+
+static void mapping_query_hw_device(pa_alsa_mapping *mapping, snd_pcm_t *pcm) {
+    int r;
+    snd_pcm_info_t* pcm_info;
+    snd_pcm_info_alloca(&pcm_info);
+
+    r = snd_pcm_info(pcm, pcm_info);
+    if (r < 0) {
+        pa_log("Mapping %s: snd_pcm_info() failed %s: ", mapping->name, pa_alsa_strerror(r));
+        return;
+    }
+
+    /* XXX: It's not clear what snd_pcm_info_get_device() does if the device is
+     * not backed by a hw device or if it's backed by multiple hw devices. We
+     * only use hw_device_index for HDMI devices, however, and for those the
+     * return value is expected to be always valid, so this shouldn't be a
+     * significant problem. */
+    mapping->hw_device_index = snd_pcm_info_get_device(pcm_info);
+}
+
+void pa_alsa_profile_set_probe(
+        pa_alsa_profile_set *ps,
+        pa_hashmap *mixers,
+        const char *dev_id,
+        const pa_sample_spec *ss,
+        unsigned default_n_fragments,
+        unsigned default_fragment_size_msec) {
+
+    bool found_output = false, found_input = false;
+
+    pa_alsa_profile *p, *last = NULL;
+    pa_alsa_profile **pp, **probe_order;
+    pa_alsa_mapping *m;
+    pa_hashmap *broken_inputs, *broken_outputs, *used_paths;
+    pa_alsa_mapping *selected_fallback_input = NULL, *selected_fallback_output = NULL;
+
+    pa_assert(ps);
+    pa_assert(dev_id);
+    pa_assert(ss);
+
+    if (ps->probed)
+        return;
+
+    broken_inputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+    broken_outputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+    used_paths = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+    pp = probe_order = pa_xnew0(pa_alsa_profile *, pa_hashmap_size(ps->profiles) + 1);
+
+    pp += add_profiles_to_probe(pp, ps->profiles, false, false);
+    pp += add_profiles_to_probe(pp, ps->profiles, false, true);
+    pp += add_profiles_to_probe(pp, ps->profiles, true, false);
+    pp += add_profiles_to_probe(pp, ps->profiles, true, true);
+
+    for (pp = probe_order; *pp; pp++) {
+        uint32_t idx;
+        p = *pp;
+
+        /* Skip if fallback and already found something, but still probe already selected fallbacks.
+         * If UCM is used then both fallback_input and fallback_output flags are false.
+         * If UCM is not used then there will be only a single entry in mappings.
+         */
+        if (found_input && p->fallback_input)
+            if (selected_fallback_input == NULL || pa_idxset_get_by_index(p->input_mappings, 0) != selected_fallback_input)
+                continue;
+        if (found_output && p->fallback_output)
+            if (selected_fallback_output == NULL || pa_idxset_get_by_index(p->output_mappings, 0) != selected_fallback_output)
+                continue;
+
+        /* Skip if this is already marked that it is supported (i.e. from the config file) */
+        if (!p->supported) {
+
+            profile_finalize_probing(last, p);
+            p->supported = true;
+
+            if (p->output_mappings) {
+                PA_IDXSET_FOREACH(m, p->output_mappings, idx) {
+                    if (pa_hashmap_get(broken_outputs, m) == m) {
+                        pa_log_debug("Skipping profile %s - will not be able to open output:%s", p->name, m->name);
+                        p->supported = false;
+                        break;
+                    }
+                }
+            }
+
+            if (p->input_mappings && p->supported) {
+                PA_IDXSET_FOREACH(m, p->input_mappings, idx) {
+                    if (pa_hashmap_get(broken_inputs, m) == m) {
+                        pa_log_debug("Skipping profile %s - will not be able to open input:%s", p->name, m->name);
+                        p->supported = false;
+                        break;
+                    }
+                }
+            }
+
+            if (p->supported)
+                pa_log_debug("Looking at profile %s", p->name);
+
+            /* Check if we can open all new ones */
+            if (p->output_mappings && p->supported)
+                PA_IDXSET_FOREACH(m, p->output_mappings, idx) {
+
+                    if (m->output_pcm)
+                        continue;
+
+                    pa_log_debug("Checking for playback on %s (%s)", m->description, m->name);
+                    if (!(m->output_pcm = mapping_open_pcm(m, ss, dev_id, m->exact_channels,
+                                                           SND_PCM_STREAM_PLAYBACK,
+                                                           default_n_fragments,
+                                                           default_fragment_size_msec))) {
+                        p->supported = false;
+                        if (pa_idxset_size(p->output_mappings) == 1 &&
+                            ((!p->input_mappings) || pa_idxset_size(p->input_mappings) == 0)) {
+                            pa_log_debug("Caching failure to open output:%s", m->name);
+                            pa_hashmap_put(broken_outputs, m, m);
+                        }
+                        break;
+                    }
+
+                    if (m->hw_device_index < 0)
+                        mapping_query_hw_device(m, m->output_pcm);
+                }
+
+            if (p->input_mappings && p->supported)
+                PA_IDXSET_FOREACH(m, p->input_mappings, idx) {
+
+                    if (m->input_pcm)
+                        continue;
+
+                    pa_log_debug("Checking for recording on %s (%s)", m->description, m->name);
+                    if (!(m->input_pcm = mapping_open_pcm(m, ss, dev_id, m->exact_channels,
+                                                          SND_PCM_STREAM_CAPTURE,
+                                                          default_n_fragments,
+                                                          default_fragment_size_msec))) {
+                        p->supported = false;
+                        if (pa_idxset_size(p->input_mappings) == 1 &&
+                            ((!p->output_mappings) || pa_idxset_size(p->output_mappings) == 0)) {
+                            pa_log_debug("Caching failure to open input:%s", m->name);
+                            pa_hashmap_put(broken_inputs, m, m);
+                        }
+                        break;
+                    }
+
+                    if (m->hw_device_index < 0)
+                        mapping_query_hw_device(m, m->input_pcm);
+                }
+
+            last = p;
+
+            if (!p->supported)
+                continue;
+        }
+
+        pa_log_debug("Profile %s supported.", p->name);
+
+        if (p->output_mappings)
+            PA_IDXSET_FOREACH(m, p->output_mappings, idx)
+                if (m->output_pcm) {
+                    found_output = true;
+                    if (p->fallback_output && selected_fallback_output == NULL) {
+                        selected_fallback_output = m;
+                    }
+                    mapping_paths_probe(m, p, PA_ALSA_DIRECTION_OUTPUT, used_paths, mixers);
+                }
+
+        if (p->input_mappings)
+            PA_IDXSET_FOREACH(m, p->input_mappings, idx)
+                if (m->input_pcm) {
+                    found_input = true;
+                    if (p->fallback_input && selected_fallback_input == NULL) {
+                        selected_fallback_input = m;
+                    }
+                    mapping_paths_probe(m, p, PA_ALSA_DIRECTION_INPUT, used_paths, mixers);
+                }
+    }
+
+    /* Clean up */
+    profile_finalize_probing(last, NULL);
+
+    pa_alsa_profile_set_drop_unsupported(ps);
+
+    paths_drop_unused(ps->input_paths, used_paths);
+    paths_drop_unused(ps->output_paths, used_paths);
+    pa_hashmap_free(broken_inputs);
+    pa_hashmap_free(broken_outputs);
+    pa_hashmap_free(used_paths);
+    pa_xfree(probe_order);
+
+    profile_set_set_availability_groups(ps);
+
+    ps->probed = true;
+}
+
+void pa_alsa_profile_set_dump(pa_alsa_profile_set *ps) {
+    pa_alsa_profile *p;
+    pa_alsa_mapping *m;
+    pa_alsa_decibel_fix *db_fix;
+    void *state;
+
+    pa_assert(ps);
+
+    pa_log_debug("Profile set %p, auto_profiles=%s, probed=%s, n_mappings=%u, n_profiles=%u, n_decibel_fixes=%u",
+                 (void*)
+                 ps,
+                 pa_yes_no(ps->auto_profiles),
+                 pa_yes_no(ps->probed),
+                 pa_hashmap_size(ps->mappings),
+                 pa_hashmap_size(ps->profiles),
+                 pa_hashmap_size(ps->decibel_fixes));
+
+    PA_HASHMAP_FOREACH(m, ps->mappings, state)
+        pa_alsa_mapping_dump(m);
+
+    PA_HASHMAP_FOREACH(p, ps->profiles, state)
+        pa_alsa_profile_dump(p);
+
+    PA_HASHMAP_FOREACH(db_fix, ps->decibel_fixes, state)
+        pa_alsa_decibel_fix_dump(db_fix);
+}
+
+void pa_alsa_profile_set_drop_unsupported(pa_alsa_profile_set *ps) {
+    pa_alsa_profile *p;
+    pa_alsa_mapping *m;
+    void *state;
+
+    PA_HASHMAP_FOREACH(p, ps->profiles, state) {
+        if (!p->supported)
+            pa_hashmap_remove_and_free(ps->profiles, p->name);
+    }
+
+    PA_HASHMAP_FOREACH(m, ps->mappings, state) {
+        if (m->supported <= 0)
+            pa_hashmap_remove_and_free(ps->mappings, m->name);
+    }
+}
+
+static pa_device_port* device_port_alsa_init(pa_hashmap *ports, /* card ports */
+    const char* name,
+    const char* description,
+    pa_alsa_path *path,
+    pa_alsa_setting *setting,
+    pa_card_profile *cp,
+    pa_hashmap *extra, /* sink/source ports */
+    pa_core *core) {
+
+    pa_device_port *p;
+
+    pa_assert(path);
+
+    p = pa_hashmap_get(ports, name);
+
+    if (!p) {
+        pa_alsa_port_data *data;
+        pa_device_port_new_data port_data;
+
+        pa_device_port_new_data_init(&port_data);
+        pa_device_port_new_data_set_name(&port_data, name);
+        pa_device_port_new_data_set_description(&port_data, description);
+        pa_device_port_new_data_set_direction(&port_data, path->direction == PA_ALSA_DIRECTION_OUTPUT ? PA_DIRECTION_OUTPUT : PA_DIRECTION_INPUT);
+        pa_device_port_new_data_set_type(&port_data, path->device_port_type);
+        pa_device_port_new_data_set_availability_group(&port_data, path->availability_group);
+
+        p = pa_device_port_new(core, &port_data, sizeof(pa_alsa_port_data));
+        pa_device_port_new_data_done(&port_data);
+        pa_assert(p);
+        pa_hashmap_put(ports, p->name, p);
+        pa_proplist_update(p->proplist, PA_UPDATE_REPLACE, path->proplist);
+
+        data = PA_DEVICE_PORT_DATA(p);
+        /* Ownership of the path and setting is not transferred to the port data, so we don't deal with freeing them */
+        data->path = path;
+        data->setting = setting;
+        path->port = p;
+    }
+
+    if (cp)
+        pa_hashmap_put(p->profiles, cp->name, cp);
+
+    if (extra) {
+        pa_hashmap_put(extra, p->name, p);
+    }
+
+    return p;
+}
+
+void pa_alsa_path_set_add_ports(
+        pa_alsa_path_set *ps,
+        pa_card_profile *cp,
+        pa_hashmap *ports, /* card ports */
+        pa_hashmap *extra, /* sink/source ports */
+        pa_core *core) {
+
+    pa_alsa_path *path;
+    void *state;
+
+    pa_assert(ports);
+
+    if (!ps)
+        return;
+
+    PA_HASHMAP_FOREACH(path, ps->paths, state) {
+        if (!path->settings || !path->settings->next) {
+            /* If there is no or just one setting we only need a
+             * single entry */
+            pa_device_port *port = device_port_alsa_init(ports, path->name,
+                path->description, path, path->settings, cp, extra, core);
+            port->priority = path->priority * 100;
+
+        } else {
+            pa_alsa_setting *s;
+            PA_LLIST_FOREACH(s, path->settings) {
+                pa_device_port *port;
+                char *n, *d;
+
+                n = pa_sprintf_malloc("%s;%s", path->name, s->name);
+
+                if (s->description[0])
+                    d = pa_sprintf_malloc("%s / %s", path->description, s->description);
+                else
+                    d = pa_xstrdup(path->description);
+
+                port = device_port_alsa_init(ports, n, d, path, s, cp, extra, core);
+                port->priority = path->priority * 100 + s->priority;
+
+                pa_xfree(n);
+                pa_xfree(d);
+            }
+        }
+    }
+}
+
+void pa_alsa_add_ports(pa_hashmap *ports, pa_alsa_path_set *ps, pa_card *card) {
+    pa_assert(ps);
+
+    if (ps->paths && pa_hashmap_size(ps->paths) > 0) {
+        pa_assert(card);
+        pa_alsa_path_set_add_ports(ps, NULL, card->ports, ports, card->core);
+    }
+
+    pa_log_debug("Added %u ports", pa_hashmap_size(ports));
+}
diff --git a/spa/plugins/alsa/acp/alsa-mixer.h b/spa/plugins/alsa/acp/alsa-mixer.h
new file mode 100644
index 0000000..643f03d
--- /dev/null
+++ b/spa/plugins/alsa/acp/alsa-mixer.h
@@ -0,0 +1,459 @@
+#ifndef fooalsamixerhfoo
+#define fooalsamixerhfoo
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <alsa/asoundlib.h>
+
+typedef struct pa_alsa_mixer pa_alsa_mixer;
+typedef struct pa_alsa_setting pa_alsa_setting;
+typedef struct pa_alsa_mixer_id pa_alsa_mixer_id;
+typedef struct pa_alsa_option pa_alsa_option;
+typedef struct pa_alsa_element pa_alsa_element;
+typedef struct pa_alsa_jack pa_alsa_jack;
+typedef struct pa_alsa_path pa_alsa_path;
+typedef struct pa_alsa_path_set pa_alsa_path_set;
+typedef struct pa_alsa_mapping pa_alsa_mapping;
+typedef struct pa_alsa_profile pa_alsa_profile;
+typedef struct pa_alsa_decibel_fix pa_alsa_decibel_fix;
+typedef struct pa_alsa_profile_set pa_alsa_profile_set;
+typedef struct pa_alsa_port_data pa_alsa_port_data;
+typedef struct pa_alsa_profile pa_alsa_profile;
+typedef struct pa_alsa_profile pa_card_profile;
+typedef struct pa_alsa_device pa_alsa_device;
+
+#define POSITION_MASK_CHANNELS 8
+
+typedef enum pa_alsa_switch_use {
+    PA_ALSA_SWITCH_IGNORE,
+    PA_ALSA_SWITCH_MUTE,   /* make this switch follow mute status */
+    PA_ALSA_SWITCH_OFF,    /* set this switch to 'off' unconditionally */
+    PA_ALSA_SWITCH_ON,     /* set this switch to 'on' unconditionally */
+    PA_ALSA_SWITCH_SELECT  /* allow the user to select switch status through a setting */
+} pa_alsa_switch_use_t;
+
+typedef enum pa_alsa_volume_use {
+    PA_ALSA_VOLUME_IGNORE,
+    PA_ALSA_VOLUME_MERGE,   /* merge this volume slider into the global volume slider */
+    PA_ALSA_VOLUME_OFF,     /* set this volume to minimal unconditionally */
+    PA_ALSA_VOLUME_ZERO,    /* set this volume to 0dB unconditionally */
+    PA_ALSA_VOLUME_CONSTANT /* set this volume to a constant value unconditionally */
+} pa_alsa_volume_use_t;
+
+typedef enum pa_alsa_enumeration_use {
+    PA_ALSA_ENUMERATION_IGNORE,
+    PA_ALSA_ENUMERATION_SELECT
+} pa_alsa_enumeration_use_t;
+
+typedef enum pa_alsa_required {
+    PA_ALSA_REQUIRED_IGNORE,
+    PA_ALSA_REQUIRED_SWITCH,
+    PA_ALSA_REQUIRED_VOLUME,
+    PA_ALSA_REQUIRED_ENUMERATION,
+    PA_ALSA_REQUIRED_ANY
+} pa_alsa_required_t;
+
+typedef enum pa_alsa_direction {
+    PA_ALSA_DIRECTION_ANY,
+    PA_ALSA_DIRECTION_OUTPUT,
+    PA_ALSA_DIRECTION_INPUT
+} pa_alsa_direction_t;
+
+
+#include "acp.h"
+#include "device-port.h"
+#include "alsa-util.h"
+#include "alsa-ucm.h"
+#include "card.h"
+
+/* A setting combines a couple of options into a single entity that
+ * may be selected. Only one setting can be active at the same
+ * time. */
+struct pa_alsa_setting {
+    pa_alsa_path *path;
+    PA_LLIST_FIELDS(pa_alsa_setting);
+
+    pa_idxset *options;
+
+    char *name;
+    char *description;
+    unsigned priority;
+};
+
+/* An entry for one ALSA mixer */
+struct pa_alsa_mixer {
+    struct pa_alsa_mixer *alias;
+    snd_mixer_t *mixer_handle;
+    bool used_for_poll:1;
+    bool used_for_probe_only:1;
+};
+
+/* ALSA mixer element identifier */
+struct pa_alsa_mixer_id {
+    char *name;
+    int index;
+};
+
+char *pa_alsa_mixer_id_to_string(char *dst, size_t dst_len, pa_alsa_mixer_id *id);
+
+/* An option belongs to an element and refers to one enumeration item
+ * of the element is an enumeration item, or a switch status if the
+ * element is a switch item. */
+struct pa_alsa_option {
+    pa_alsa_element *element;
+    PA_LLIST_FIELDS(pa_alsa_option);
+
+    char *alsa_name;
+    int alsa_idx;
+
+    char *name;
+    char *description;
+    unsigned priority;
+
+    pa_alsa_required_t required;
+    pa_alsa_required_t required_any;
+    pa_alsa_required_t required_absent;
+};
+
+/* An element wraps one specific ALSA element. A series of elements
+ * make up a path (see below). If the element is an enumeration or switch
+ * element it may include a list of options. */
+struct pa_alsa_element {
+    pa_alsa_path *path;
+    PA_LLIST_FIELDS(pa_alsa_element);
+
+    struct pa_alsa_mixer_id alsa_id;
+    pa_alsa_direction_t direction;
+
+    pa_alsa_switch_use_t switch_use;
+    pa_alsa_volume_use_t volume_use;
+    pa_alsa_enumeration_use_t enumeration_use;
+
+    pa_alsa_required_t required;
+    pa_alsa_required_t required_any;
+    pa_alsa_required_t required_absent;
+
+    long constant_volume;
+
+    unsigned int override_map;
+    bool direction_try_other:1;
+
+    bool has_dB:1;
+    long min_volume, max_volume;
+    long volume_limit; /* -1 for no configured limit */
+    double min_dB, max_dB;
+
+    pa_channel_position_mask_t masks[SND_MIXER_SCHN_LAST + 1][POSITION_MASK_CHANNELS];
+    unsigned n_channels;
+
+    pa_channel_position_mask_t merged_mask;
+
+    PA_LLIST_HEAD(pa_alsa_option, options);
+
+    pa_alsa_decibel_fix *db_fix;
+};
+
+struct pa_alsa_jack {
+    pa_alsa_path *path;
+    PA_LLIST_FIELDS(pa_alsa_jack);
+
+    snd_mixer_t *mixer_handle;
+    char *mixer_device_name;
+
+    struct pa_alsa_mixer_id alsa_id;
+    char *name; /* E g "Headphone" */
+    bool has_control; /* is the jack itself present? */
+    bool plugged_in; /* is this jack currently plugged in? */
+    snd_mixer_elem_t *melem; /* Jack detection handle */
+    pa_available_t state_unplugged, state_plugged;
+
+    pa_alsa_required_t required;
+    pa_alsa_required_t required_any;
+    pa_alsa_required_t required_absent;
+
+    pa_dynarray *ucm_devices; /* pa_alsa_ucm_device */
+    pa_dynarray *ucm_hw_mute_devices; /* pa_alsa_ucm_device */
+
+    bool append_pcm_to_name;
+};
+
+pa_alsa_jack *pa_alsa_jack_new(pa_alsa_path *path, const char *mixer_device_name, const char *name, int index);
+void pa_alsa_jack_free(pa_alsa_jack *jack);
+void pa_alsa_jack_set_has_control(pa_alsa_jack *jack, bool has_control);
+void pa_alsa_jack_set_plugged_in(pa_alsa_jack *jack, bool plugged_in);
+void pa_alsa_jack_add_ucm_device(pa_alsa_jack *jack, pa_alsa_ucm_device *device);
+void pa_alsa_jack_add_ucm_hw_mute_device(pa_alsa_jack *jack, pa_alsa_ucm_device *device);
+
+/* A path wraps a series of elements into a single entity which can be
+ * used to control it as if it had a single volume slider, a single
+ * mute switch and a single list of selectable options. */
+struct pa_alsa_path {
+    pa_alsa_direction_t direction;
+    pa_device_port* port;
+
+    char *name;
+    char *description_key;
+    char *description;
+    char *availability_group;
+    pa_device_port_type_t device_port_type;
+    unsigned priority;
+    bool autodetect_eld_device;
+    pa_alsa_mixer *eld_mixer_handle;
+    int eld_device;
+    pa_proplist *proplist;
+
+    bool probed:1;
+    bool supported:1;
+    bool has_mute:1;
+    bool has_volume:1;
+    bool has_dB:1;
+    bool mute_during_activation:1;
+    /* These two are used during probing only */
+    bool has_req_any:1;
+    bool req_any_present:1;
+
+    long min_volume, max_volume;
+    double min_dB, max_dB;
+
+    /* This is used during parsing only, as a shortcut so that we
+     * don't have to iterate the list all the time */
+    pa_alsa_element *last_element;
+    pa_alsa_option *last_option;
+    pa_alsa_setting *last_setting;
+    pa_alsa_jack *last_jack;
+
+    PA_LLIST_HEAD(pa_alsa_element, elements);
+    PA_LLIST_HEAD(pa_alsa_setting, settings);
+    PA_LLIST_HEAD(pa_alsa_jack, jacks);
+};
+
+/* A path set is simply a set of paths that are applicable to a
+ * device */
+struct pa_alsa_path_set {
+    pa_hashmap *paths;
+    pa_alsa_direction_t direction;
+};
+
+void pa_alsa_setting_dump(pa_alsa_setting *s);
+
+void pa_alsa_option_dump(pa_alsa_option *o);
+void pa_alsa_jack_dump(pa_alsa_jack *j);
+void pa_alsa_element_dump(pa_alsa_element *e);
+
+pa_alsa_path *pa_alsa_path_new(const char *paths_dir, const char *fname, pa_alsa_direction_t direction);
+pa_alsa_path *pa_alsa_path_synthesize(const char *element, pa_alsa_direction_t direction);
+pa_alsa_element *pa_alsa_element_get(pa_alsa_path *p, const char *section, bool prefixed);
+int pa_alsa_path_probe(pa_alsa_path *p, pa_alsa_mapping *mapping, snd_mixer_t *m, bool ignore_dB);
+void pa_alsa_path_dump(pa_alsa_path *p);
+int pa_alsa_path_get_volume(pa_alsa_path *p, snd_mixer_t *m, const pa_channel_map *cm, pa_cvolume *v);
+int pa_alsa_path_get_mute(pa_alsa_path *path, snd_mixer_t *m, bool *muted);
+int pa_alsa_path_set_volume(pa_alsa_path *path, snd_mixer_t *m, const pa_channel_map *cm, pa_cvolume *v, bool deferred_volume, bool write_to_hw);
+int pa_alsa_path_set_mute(pa_alsa_path *path, snd_mixer_t *m, bool muted);
+int pa_alsa_path_select(pa_alsa_path *p, pa_alsa_setting *s, snd_mixer_t *m, bool device_is_muted);
+void pa_alsa_path_set_callback(pa_alsa_path *p, snd_mixer_t *m, snd_mixer_elem_callback_t cb, void *userdata);
+void pa_alsa_path_free(pa_alsa_path *p);
+
+pa_alsa_path_set *pa_alsa_path_set_new(pa_alsa_mapping *m, pa_alsa_direction_t direction, const char *paths_dir);
+void pa_alsa_path_set_dump(pa_alsa_path_set *s);
+void pa_alsa_path_set_set_callback(pa_alsa_path_set *ps, snd_mixer_t *m, snd_mixer_elem_callback_t cb, void *userdata);
+void pa_alsa_path_set_free(pa_alsa_path_set *s);
+int pa_alsa_path_set_is_empty(pa_alsa_path_set *s);
+
+struct pa_alsa_device {
+    struct acp_device device;
+
+    pa_card *card;
+
+    pa_alsa_direction_t direction;
+    pa_proplist *proplist;
+
+    pa_alsa_mapping *mapping;
+    pa_alsa_ucm_mapping_context *ucm_context;
+
+    pa_hashmap *ports;
+    pa_dynarray port_array;
+    pa_device_port *active_port;
+
+    snd_mixer_t *mixer_handle;
+    pa_alsa_path_set *mixer_path_set;
+    pa_alsa_path *mixer_path;
+    snd_pcm_t *pcm_handle;
+
+    unsigned muted:1;
+    unsigned decibel_volume:1;
+    pa_cvolume real_volume;
+    pa_cvolume hardware_volume;
+    pa_cvolume soft_volume;
+
+    pa_volume_t base_volume;
+    unsigned n_volume_steps;
+
+    int (*read_volume)(pa_alsa_device *dev);
+    int (*read_mute)(pa_alsa_device *dev);
+
+    void (*set_volume)(pa_alsa_device *dev, const pa_cvolume *v);
+    void (*set_mute)(pa_alsa_device *dev, bool m);
+};
+
+struct pa_alsa_mapping {
+    pa_alsa_profile_set *profile_set;
+
+    char *name;
+    char *description;
+    char *description_key;
+    unsigned priority;
+    pa_alsa_direction_t direction;
+    /* These are copied over to the resultant sink/source */
+    pa_proplist *proplist;
+
+    pa_sample_spec sample_spec;
+    pa_channel_map channel_map;
+
+    char **device_strings;
+
+    char **input_path_names;
+    char **output_path_names;
+    char **input_element; /* list of fallbacks */
+    char **output_element;
+    pa_alsa_path_set *input_path_set;
+    pa_alsa_path_set *output_path_set;
+
+    unsigned supported;
+    bool exact_channels:1;
+    bool fallback:1;
+
+    /* The "y" in "hw:x,y". This is set to -1 before the device index has been
+     * queried, or if the query failed. */
+    int hw_device_index;
+
+    /* Temporarily used during probing */
+    snd_pcm_t *input_pcm;
+    snd_pcm_t *output_pcm;
+
+    pa_proplist *input_proplist;
+    pa_proplist *output_proplist;
+
+    pa_alsa_device output;
+    pa_alsa_device input;
+
+    /* ucm device context*/
+    pa_alsa_ucm_mapping_context ucm_context;
+};
+
+struct pa_alsa_profile {
+    struct acp_card_profile profile;
+
+    pa_alsa_profile_set *profile_set;
+
+    char *name;
+    char *description;
+    char *description_key;
+    unsigned priority;
+
+    char *input_name;
+    char *output_name;
+
+    bool supported:1;
+    bool fallback_input:1;
+    bool fallback_output:1;
+
+    char **input_mapping_names;
+    char **output_mapping_names;
+
+    pa_idxset *input_mappings;
+    pa_idxset *output_mappings;
+
+    struct {
+	pa_dynarray devices;
+    } out;
+};
+
+struct pa_alsa_decibel_fix {
+    char *key;
+
+    pa_alsa_profile_set *profile_set;
+
+    char *name; /* Alsa volume element name. */
+    int index;  /* Alsa volume element index. */
+    long min_step;
+    long max_step;
+
+    /* An array that maps alsa volume element steps to decibels. The steps can
+     * be used as indices to this array, after subtracting min_step from the
+     * real value.
+     *
+     * The values are actually stored as integers representing millibels,
+     * because that's the format the alsa API uses. */
+    long *db_values;
+};
+
+struct pa_alsa_profile_set {
+    pa_hashmap *mappings;
+    pa_hashmap *profiles;
+    pa_hashmap *decibel_fixes;
+    pa_hashmap *input_paths;
+    pa_hashmap *output_paths;
+
+    bool auto_profiles;
+    bool ignore_dB:1;
+    bool probed:1;
+};
+
+void pa_alsa_mapping_dump(pa_alsa_mapping *m);
+void pa_alsa_profile_dump(pa_alsa_profile *p);
+void pa_alsa_decibel_fix_dump(pa_alsa_decibel_fix *db_fix);
+pa_alsa_mapping *pa_alsa_mapping_get(pa_alsa_profile_set *ps, const char *name);
+void pa_alsa_mapping_free (pa_alsa_mapping *m);
+void pa_alsa_profile_free (pa_alsa_profile *p);
+
+pa_alsa_profile_set* pa_alsa_profile_set_new(const char *fname, const pa_channel_map *bonus);
+void pa_alsa_profile_set_probe(pa_alsa_profile_set *ps, pa_hashmap *mixers, const char *dev_id, const pa_sample_spec *ss, unsigned default_n_fragments, unsigned default_fragment_size_msec);
+void pa_alsa_profile_set_free(pa_alsa_profile_set *s);
+void pa_alsa_profile_set_dump(pa_alsa_profile_set *s);
+void pa_alsa_profile_set_drop_unsupported(pa_alsa_profile_set *s);
+
+void pa_alsa_mixer_use_for_poll(pa_hashmap *mixers, snd_mixer_t *mixer_handle);
+
+#if 0
+pa_alsa_fdlist *pa_alsa_fdlist_new(void);
+void pa_alsa_fdlist_free(pa_alsa_fdlist *fdl);
+int pa_alsa_fdlist_set_handle(pa_alsa_fdlist *fdl, snd_mixer_t *mixer_handle, snd_hctl_t *hctl_handle, pa_mainloop_api* m);
+
+/* Alternative for handling alsa mixer events in io-thread. */
+
+pa_alsa_mixer_pdata *pa_alsa_mixer_pdata_new(void);
+void pa_alsa_mixer_pdata_free(pa_alsa_mixer_pdata *pd);
+int pa_alsa_set_mixer_rtpoll(struct pa_alsa_mixer_pdata *pd, snd_mixer_t *mixer, pa_rtpoll *rtp);
+#endif
+
+/* Data structure for inclusion in pa_device_port for alsa
+ * sinks/sources. This contains nothing that needs to be freed
+ * individually */
+struct pa_alsa_port_data {
+    pa_alsa_path *path;
+    pa_alsa_setting *setting;
+    bool suspend_when_unavailable;
+};
+
+void pa_alsa_add_ports(pa_hashmap *ports, pa_alsa_path_set *ps, pa_card *card);
+void pa_alsa_path_set_add_ports(pa_alsa_path_set *ps, pa_alsa_profile *cp, pa_hashmap *ports, pa_hashmap *extra, pa_core *core);
+
+#endif
diff --git a/spa/plugins/alsa/acp/alsa-ucm.c b/spa/plugins/alsa/acp/alsa-ucm.c
new file mode 100644
index 0000000..f66b771
--- /dev/null
+++ b/spa/plugins/alsa/acp/alsa-ucm.c
@@ -0,0 +1,2420 @@
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2011 Wolfson Microelectronics PLC
+ Author Margarita Olaya <magi@slimlogic.co.uk>
+ Copyright 2012 Feng Wei <wei.feng@freescale.com>, Freescale Ltd.
+
+ PulseAudio is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published
+ by the Free Software Foundation; either version 2.1 of the License,
+ or (at your option) any later version.
+
+ PulseAudio is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include "config.h"
+
+#include <ctype.h>
+#include <sys/types.h>
+#include <limits.h>
+#include <alsa/asoundlib.h>
+
+#ifdef HAVE_VALGRIND_MEMCHECK_H
+#include <valgrind/memcheck.h>
+#endif
+
+#include "alsa-mixer.h"
+#include "alsa-util.h"
+#include "alsa-ucm.h"
+
+#define PA_UCM_PRE_TAG_OUTPUT                       "[Out] "
+#define PA_UCM_PRE_TAG_INPUT                        "[In] "
+
+#define PA_UCM_PLAYBACK_PRIORITY_UNSET(device)      ((device)->playback_channels && !(device)->playback_priority)
+#define PA_UCM_CAPTURE_PRIORITY_UNSET(device)       ((device)->capture_channels && !(device)->capture_priority)
+#define PA_UCM_DEVICE_PRIORITY_SET(device, priority) \
+    do { \
+        if (PA_UCM_PLAYBACK_PRIORITY_UNSET(device)) (device)->playback_priority = (priority);   \
+        if (PA_UCM_CAPTURE_PRIORITY_UNSET(device))  (device)->capture_priority = (priority);    \
+    } while (0)
+#define PA_UCM_IS_MODIFIER_MAPPING(m) ((pa_proplist_gets((m)->proplist, PA_ALSA_PROP_UCM_MODIFIER)) != NULL)
+
+#ifdef HAVE_ALSA_UCM
+
+struct ucm_type {
+    const char *prefix;
+    pa_device_port_type_t type;
+};
+
+struct ucm_items {
+    const char *id;
+    const char *property;
+};
+
+struct ucm_info {
+    const char *id;
+    unsigned priority;
+};
+
+static pa_alsa_jack* ucm_get_jack(pa_alsa_ucm_config *ucm, pa_alsa_ucm_device *device);
+static void device_set_jack(pa_alsa_ucm_device *device, pa_alsa_jack *jack);
+static void device_add_hw_mute_jack(pa_alsa_ucm_device *device, pa_alsa_jack *jack);
+
+static pa_alsa_ucm_device *verb_find_device(pa_alsa_ucm_verb *verb, const char *device_name);
+
+
+static void ucm_port_data_init(pa_alsa_ucm_port_data *port, pa_alsa_ucm_config *ucm, pa_device_port *core_port,
+                               pa_alsa_ucm_device **devices, unsigned n_devices);
+static void ucm_port_data_free(pa_device_port *port);
+static void ucm_port_update_available(pa_alsa_ucm_port_data *port);
+
+static struct ucm_type types[] = {
+    {"None", PA_DEVICE_PORT_TYPE_UNKNOWN},
+    {"Speaker", PA_DEVICE_PORT_TYPE_SPEAKER},
+    {"Line", PA_DEVICE_PORT_TYPE_LINE},
+    {"Mic", PA_DEVICE_PORT_TYPE_MIC},
+    {"Headphones", PA_DEVICE_PORT_TYPE_HEADPHONES},
+    {"Headset", PA_DEVICE_PORT_TYPE_HEADSET},
+    {"Handset", PA_DEVICE_PORT_TYPE_HANDSET},
+    {"Bluetooth", PA_DEVICE_PORT_TYPE_BLUETOOTH},
+    {"Earpiece", PA_DEVICE_PORT_TYPE_EARPIECE},
+    {"SPDIF", PA_DEVICE_PORT_TYPE_SPDIF},
+    {"HDMI", PA_DEVICE_PORT_TYPE_HDMI},
+    {NULL, 0}
+};
+
+static struct ucm_items item[] = {
+    {"PlaybackPCM", PA_ALSA_PROP_UCM_SINK},
+    {"CapturePCM", PA_ALSA_PROP_UCM_SOURCE},
+    {"PlaybackCTL", PA_ALSA_PROP_UCM_PLAYBACK_CTL_DEVICE},
+    {"PlaybackVolume", PA_ALSA_PROP_UCM_PLAYBACK_VOLUME},
+    {"PlaybackSwitch", PA_ALSA_PROP_UCM_PLAYBACK_SWITCH},
+    {"PlaybackMixer", PA_ALSA_PROP_UCM_PLAYBACK_MIXER_DEVICE},
+    {"PlaybackMixerElem", PA_ALSA_PROP_UCM_PLAYBACK_MIXER_ELEM},
+    {"PlaybackMasterElem", PA_ALSA_PROP_UCM_PLAYBACK_MASTER_ELEM},
+    {"PlaybackMasterType", PA_ALSA_PROP_UCM_PLAYBACK_MASTER_TYPE},
+    {"PlaybackPriority", PA_ALSA_PROP_UCM_PLAYBACK_PRIORITY},
+    {"PlaybackRate", PA_ALSA_PROP_UCM_PLAYBACK_RATE},
+    {"PlaybackChannels", PA_ALSA_PROP_UCM_PLAYBACK_CHANNELS},
+    {"CaptureCTL", PA_ALSA_PROP_UCM_CAPTURE_CTL_DEVICE},
+    {"CaptureVolume", PA_ALSA_PROP_UCM_CAPTURE_VOLUME},
+    {"CaptureSwitch", PA_ALSA_PROP_UCM_CAPTURE_SWITCH},
+    {"CaptureMixer", PA_ALSA_PROP_UCM_CAPTURE_MIXER_DEVICE},
+    {"CaptureMixerElem", PA_ALSA_PROP_UCM_CAPTURE_MIXER_ELEM},
+    {"CaptureMasterElem", PA_ALSA_PROP_UCM_CAPTURE_MASTER_ELEM},
+    {"CaptureMasterType", PA_ALSA_PROP_UCM_CAPTURE_MASTER_TYPE},
+    {"CapturePriority", PA_ALSA_PROP_UCM_CAPTURE_PRIORITY},
+    {"CaptureRate", PA_ALSA_PROP_UCM_CAPTURE_RATE},
+    {"CaptureChannels", PA_ALSA_PROP_UCM_CAPTURE_CHANNELS},
+    {"TQ", PA_ALSA_PROP_UCM_QOS},
+    {"JackCTL", PA_ALSA_PROP_UCM_JACK_DEVICE},
+    {"JackControl", PA_ALSA_PROP_UCM_JACK_CONTROL},
+    {"JackHWMute", PA_ALSA_PROP_UCM_JACK_HW_MUTE},
+    {NULL, NULL},
+};
+
+/* UCM verb info - this should eventually be part of policy management */
+static struct ucm_info verb_info[] = {
+    {SND_USE_CASE_VERB_INACTIVE, 0},
+    {SND_USE_CASE_VERB_HIFI, 8000},
+    {SND_USE_CASE_VERB_HIFI_LOW_POWER, 7000},
+    {SND_USE_CASE_VERB_VOICE, 6000},
+    {SND_USE_CASE_VERB_VOICE_LOW_POWER, 5000},
+    {SND_USE_CASE_VERB_VOICECALL, 4000},
+    {SND_USE_CASE_VERB_IP_VOICECALL, 4000},
+    {SND_USE_CASE_VERB_ANALOG_RADIO, 3000},
+    {SND_USE_CASE_VERB_DIGITAL_RADIO, 3000},
+    {NULL, 0}
+};
+
+/* UCM device info - should be overwritten by ucm property */
+static struct ucm_info dev_info[] = {
+    {SND_USE_CASE_DEV_SPEAKER, 100},
+    {SND_USE_CASE_DEV_LINE, 100},
+    {SND_USE_CASE_DEV_HEADPHONES, 100},
+    {SND_USE_CASE_DEV_HEADSET, 300},
+    {SND_USE_CASE_DEV_HANDSET, 200},
+    {SND_USE_CASE_DEV_BLUETOOTH, 400},
+    {SND_USE_CASE_DEV_EARPIECE, 100},
+    {SND_USE_CASE_DEV_SPDIF, 100},
+    {SND_USE_CASE_DEV_HDMI, 100},
+    {SND_USE_CASE_DEV_NONE, 100},
+    {NULL, 0}
+};
+
+
+static char *ucm_verb_value(
+    snd_use_case_mgr_t *uc_mgr,
+    const char *verb_name,
+    const char *id) {
+
+    const char *value;
+    char *_id = pa_sprintf_malloc("=%s//%s", id, verb_name);
+    int err = snd_use_case_get(uc_mgr, _id, &value);
+    pa_xfree(_id);
+    if (err < 0)
+         return NULL;
+    pa_log_debug("Got %s for verb %s: %s", id, verb_name, value);
+    /* Use the cast here to allow free() call without casting for callers.
+     * The snd_use_case_get() returns mallocated string.
+     * See the Note: in use-case.h for snd_use_case_get().
+     */
+    return (char *)value;
+}
+
+static int ucm_device_exists(pa_idxset *idxset, pa_alsa_ucm_device *dev) {
+    pa_alsa_ucm_device *d;
+    uint32_t idx;
+
+    PA_IDXSET_FOREACH(d, idxset, idx)
+        if (d == dev)
+            return 1;
+
+    return 0;
+}
+
+static void ucm_add_devices_to_idxset(
+        pa_idxset *idxset,
+        pa_alsa_ucm_device *me,
+        pa_alsa_ucm_device *devices,
+        const char **dev_names,
+        int n) {
+
+    pa_alsa_ucm_device *d;
+
+    PA_LLIST_FOREACH(d, devices) {
+        const char *name;
+        int i;
+
+        if (d == me)
+            continue;
+
+        name = pa_proplist_gets(d->proplist, PA_ALSA_PROP_UCM_NAME);
+
+        for (i = 0; i < n; i++)
+            if (pa_streq(dev_names[i], name))
+                pa_idxset_put(idxset, d, NULL);
+    }
+}
+
+/* Split a string into words. Like pa_split_spaces() but handle '' and "". */
+static char *ucm_split_devnames(const char *c, const char **state) {
+    const char *current = *state ? *state : c;
+    char h;
+    size_t l;
+
+    if (!*current || *c == 0)
+        return NULL;
+
+    current += strspn(current, "\n\r \t");
+    h = *current;
+    if (h == '\'' || h =='"') {
+        c = ++current;
+        for (l = 0; *c && *c != h; l++) c++;
+        if (*c != h)
+            return NULL;
+        *state = c + 1;
+    } else {
+        l = strcspn(current, "\n\r \t");
+        *state = current+l;
+    }
+
+    return pa_xstrndup(current, l);
+}
+
+
+static void ucm_volume_free(pa_alsa_ucm_volume *vol) {
+    pa_assert(vol);
+    pa_xfree(vol->mixer_elem);
+    pa_xfree(vol->master_elem);
+    pa_xfree(vol->master_type);
+    pa_xfree(vol);
+}
+
+/* Get the volume identifier */
+static char *ucm_get_mixer_id(
+        pa_alsa_ucm_device *device,
+        const char *mprop,
+        const char *cprop,
+        const char *cid)
+{
+#if SND_LIB_VERSION >= 0x10201 /* alsa-lib-1.2.1+ check */
+    snd_ctl_elem_id_t *ctl;
+    int err;
+#endif
+    const char *value;
+    char *value2;
+    int index;
+
+    /* mixer element as first, if it's found, return it without modifications */
+    value = pa_proplist_gets(device->proplist, mprop);
+    if (value)
+        return pa_xstrdup(value);
+    /* fallback, get the control element identifier */
+    /* and try to do some heuristic to determine the mixer element name */
+    value = pa_proplist_gets(device->proplist, cprop);
+    if (value == NULL)
+        return NULL;
+#if SND_LIB_VERSION >= 0x10201 /* alsa-lib-1.2.1+ check */
+    /* The new parser may return also element index. */
+    snd_ctl_elem_id_alloca(&ctl);
+    err = snd_use_case_parse_ctl_elem_id(ctl, cid, value);
+    if (err < 0)
+        return NULL;
+    value = snd_ctl_elem_id_get_name(ctl);
+    index = snd_ctl_elem_id_get_index(ctl);
+#else
+#warning "Upgrade to alsa-lib 1.2.1!"
+    index = 0;
+#endif
+    if (!(value2 = pa_str_strip_suffix(value, " Playback Volume")))
+        if (!(value2 = pa_str_strip_suffix(value, " Capture Volume")))
+            if (!(value2 = pa_str_strip_suffix(value, " Volume")))
+                value2 = pa_xstrdup(value);
+    if (index > 0) {
+        char *mix = pa_sprintf_malloc("'%s',%d", value2, index);
+        pa_xfree(value2);
+        return mix;
+    }
+    return value2;
+}
+
+/* Get the volume identifier */
+static pa_alsa_ucm_volume *ucm_get_mixer_volume(
+        pa_alsa_ucm_device *device,
+        const char *mprop,
+        const char *cprop,
+        const char *cid,
+        const char *masterid,
+        const char *mastertype)
+{
+    pa_alsa_ucm_volume *vol;
+    char *mixer_elem;
+
+    mixer_elem = ucm_get_mixer_id(device, mprop, cprop, cid);
+    if (mixer_elem == NULL)
+        return NULL;
+    vol = pa_xnew0(pa_alsa_ucm_volume, 1);
+    if (vol == NULL) {
+        pa_xfree(mixer_elem);
+        return NULL;
+    }
+    vol->mixer_elem = mixer_elem;
+    vol->master_elem = pa_xstrdup(pa_proplist_gets(device->proplist, masterid));
+    vol->master_type = pa_xstrdup(pa_proplist_gets(device->proplist, mastertype));
+    return vol;
+}
+
+/* Get the ALSA mixer device for the UCM device */
+static const char *get_mixer_device(pa_alsa_ucm_device *dev, bool is_sink)
+{
+    const char *dev_name;
+
+    if (is_sink) {
+        dev_name = pa_proplist_gets(dev->proplist, PA_ALSA_PROP_UCM_PLAYBACK_MIXER_DEVICE);
+        if (!dev_name)
+            dev_name = pa_proplist_gets(dev->proplist, PA_ALSA_PROP_UCM_PLAYBACK_CTL_DEVICE);
+    } else {
+        dev_name = pa_proplist_gets(dev->proplist, PA_ALSA_PROP_UCM_CAPTURE_MIXER_DEVICE);
+        if (!dev_name)
+            dev_name = pa_proplist_gets(dev->proplist, PA_ALSA_PROP_UCM_CAPTURE_CTL_DEVICE);
+    }
+    return dev_name;
+}
+
+/* Get the ALSA mixer device for the UCM jack */
+static const char *get_jack_mixer_device(pa_alsa_ucm_device *dev, bool is_sink) {
+    const char *dev_name = pa_proplist_gets(dev->proplist, PA_ALSA_PROP_UCM_JACK_DEVICE);
+    if (!dev_name)
+        return get_mixer_device(dev, is_sink);
+    return dev_name;
+}
+
+/* Create a property list for this ucm device */
+static int ucm_get_device_property(
+        pa_alsa_ucm_device *device,
+        snd_use_case_mgr_t *uc_mgr,
+        pa_alsa_ucm_verb *verb,
+        const char *device_name) {
+
+    const char *value;
+    const char **devices;
+    char *id, *s;
+    int i;
+    int err;
+    uint32_t ui;
+    int n_confdev, n_suppdev;
+    pa_alsa_ucm_volume *vol;
+
+    /* determine the device type */
+    device->type = PA_DEVICE_PORT_TYPE_UNKNOWN;
+    id = s = pa_xstrdup(device_name);
+    while (s && *s && isalpha(*s)) s++;
+    if (s)
+        *s = '\0';
+    for (i = 0; types[i].prefix; i++)
+        if (pa_streq(id, types[i].prefix)) {
+            device->type = types[i].type;
+            break;
+        }
+    pa_xfree(id);
+
+    /* set properties */
+    for (i = 0; item[i].id; i++) {
+        id = pa_sprintf_malloc("%s/%s", item[i].id, device_name);
+        err = snd_use_case_get(uc_mgr, id, &value);
+        pa_xfree(id);
+        if (err < 0)
+            continue;
+
+        pa_log_debug("Got %s for device %s: %s", item[i].id, device_name, value);
+        pa_proplist_sets(device->proplist, item[i].property, value);
+        free((void*)value);
+    }
+
+    /* get direction and channels */
+    value = pa_proplist_gets(device->proplist, PA_ALSA_PROP_UCM_PLAYBACK_CHANNELS);
+    if (value) { /* output */
+        /* get channels */
+        if (pa_atou(value, &ui) == 0 && pa_channels_valid(ui))
+            device->playback_channels = ui;
+        else
+            pa_log("UCM playback channels %s for device %s out of range", value, device_name);
+
+        /* get pcm */
+        value = pa_proplist_gets(device->proplist, PA_ALSA_PROP_UCM_SINK);
+        if (!value) /* take pcm from verb playback default */
+            pa_log("UCM playback device %s fetch pcm failed", device_name);
+    }
+
+    if (pa_proplist_gets(device->proplist, PA_ALSA_PROP_UCM_SINK) &&
+        device->playback_channels == 0) {
+        pa_log_info("UCM file does not specify 'PlaybackChannels' "
+                    "for device %s, assuming stereo.", device_name);
+        device->playback_channels = 2;
+    }
+
+    value = pa_proplist_gets(device->proplist, PA_ALSA_PROP_UCM_CAPTURE_CHANNELS);
+    if (value) { /* input */
+        /* get channels */
+        if (pa_atou(value, &ui) == 0 && pa_channels_valid(ui))
+            device->capture_channels = ui;
+        else
+            pa_log("UCM capture channels %s for device %s out of range", value, device_name);
+
+        /* get pcm */
+        value = pa_proplist_gets(device->proplist, PA_ALSA_PROP_UCM_SOURCE);
+        if (!value) /* take pcm from verb capture default */
+            pa_log("UCM capture device %s fetch pcm failed", device_name);
+    }
+
+    if (pa_proplist_gets(device->proplist, PA_ALSA_PROP_UCM_SOURCE) &&
+        device->capture_channels == 0) {
+        pa_log_info("UCM file does not specify 'CaptureChannels' "
+                    "for device %s, assuming stereo.", device_name);
+        device->capture_channels = 2;
+    }
+
+    /* get rate and priority of device */
+    if (device->playback_channels) { /* sink device */
+        /* get rate */
+        if ((value = pa_proplist_gets(device->proplist, PA_ALSA_PROP_UCM_PLAYBACK_RATE))) {
+            if (pa_atou(value, &ui) == 0 && pa_sample_rate_valid(ui)) {
+                pa_log_debug("UCM playback device %s rate %d", device_name, ui);
+                device->playback_rate = ui;
+            } else
+                pa_log_debug("UCM playback device %s has bad rate %s", device_name, value);
+        }
+
+        value = pa_proplist_gets(device->proplist, PA_ALSA_PROP_UCM_PLAYBACK_PRIORITY);
+        if (value) {
+            /* get priority from ucm config */
+            if (pa_atou(value, &ui) == 0)
+                device->playback_priority = ui;
+            else
+                pa_log_debug("UCM playback priority %s for device %s error", value, device_name);
+        }
+
+        vol = ucm_get_mixer_volume(device,
+                                   PA_ALSA_PROP_UCM_PLAYBACK_MIXER_ELEM,
+                                   PA_ALSA_PROP_UCM_PLAYBACK_VOLUME,
+                                   "PlaybackVolume",
+                                   PA_ALSA_PROP_UCM_PLAYBACK_MASTER_ELEM,
+                                   PA_ALSA_PROP_UCM_PLAYBACK_MASTER_TYPE);
+        if (vol)
+            pa_hashmap_put(device->playback_volumes, pa_xstrdup(pa_proplist_gets(verb->proplist, PA_ALSA_PROP_UCM_NAME)), vol);
+    }
+
+    if (device->capture_channels) { /* source device */
+        /* get rate */
+        if ((value = pa_proplist_gets(device->proplist, PA_ALSA_PROP_UCM_CAPTURE_RATE))) {
+            if (pa_atou(value, &ui) == 0 && pa_sample_rate_valid(ui)) {
+                pa_log_debug("UCM capture device %s rate %d", device_name, ui);
+                device->capture_rate = ui;
+            } else
+                pa_log_debug("UCM capture device %s has bad rate %s", device_name, value);
+        }
+
+        value = pa_proplist_gets(device->proplist, PA_ALSA_PROP_UCM_CAPTURE_PRIORITY);
+        if (value) {
+            /* get priority from ucm config */
+            if (pa_atou(value, &ui) == 0)
+                device->capture_priority = ui;
+            else
+                pa_log_debug("UCM capture priority %s for device %s error", value, device_name);
+        }
+
+        vol = ucm_get_mixer_volume(device,
+                                   PA_ALSA_PROP_UCM_CAPTURE_MIXER_ELEM,
+                                   PA_ALSA_PROP_UCM_CAPTURE_VOLUME,
+                                   "CaptureVolume",
+                                   PA_ALSA_PROP_UCM_CAPTURE_MASTER_ELEM,
+                                   PA_ALSA_PROP_UCM_CAPTURE_MASTER_TYPE);
+        if (vol)
+          pa_hashmap_put(device->capture_volumes, pa_xstrdup(pa_proplist_gets(verb->proplist, PA_ALSA_PROP_UCM_NAME)), vol);
+    }
+
+    if (PA_UCM_PLAYBACK_PRIORITY_UNSET(device) || PA_UCM_CAPTURE_PRIORITY_UNSET(device)) {
+        /* get priority from static table */
+        for (i = 0; dev_info[i].id; i++) {
+            if (strcasecmp(dev_info[i].id, device_name) == 0) {
+                PA_UCM_DEVICE_PRIORITY_SET(device, dev_info[i].priority);
+                break;
+            }
+        }
+    }
+
+    if (PA_UCM_PLAYBACK_PRIORITY_UNSET(device)) {
+        /* fall through to default priority */
+        device->playback_priority = 100;
+    }
+
+    if (PA_UCM_CAPTURE_PRIORITY_UNSET(device)) {
+        /* fall through to default priority */
+        device->capture_priority = 100;
+    }
+
+    id = pa_sprintf_malloc("%s/%s", "_conflictingdevs", device_name);
+    n_confdev = snd_use_case_get_list(uc_mgr, id, &devices);
+    pa_xfree(id);
+
+    if (n_confdev <= 0)
+        pa_log_debug("No %s for device %s", "_conflictingdevs", device_name);
+    else {
+        device->conflicting_devices = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+        ucm_add_devices_to_idxset(device->conflicting_devices, device, verb->devices, devices, n_confdev);
+        snd_use_case_free_list(devices, n_confdev);
+    }
+
+    id = pa_sprintf_malloc("%s/%s", "_supporteddevs", device_name);
+    n_suppdev = snd_use_case_get_list(uc_mgr, id, &devices);
+    pa_xfree(id);
+
+    if (n_suppdev <= 0)
+        pa_log_debug("No %s for device %s", "_supporteddevs", device_name);
+    else {
+        device->supported_devices = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+        ucm_add_devices_to_idxset(device->supported_devices, device, verb->devices, devices, n_suppdev);
+        snd_use_case_free_list(devices, n_suppdev);
+    }
+
+    return 0;
+};
+
+/* Create a property list for this ucm modifier */
+static int ucm_get_modifier_property(pa_alsa_ucm_modifier *modifier, snd_use_case_mgr_t *uc_mgr, const char *modifier_name) {
+    const char *value;
+    char *id;
+    int i;
+
+    for (i = 0; item[i].id; i++) {
+        int err;
+
+        id = pa_sprintf_malloc("=%s/%s", item[i].id, modifier_name);
+        err = snd_use_case_get(uc_mgr, id, &value);
+        pa_xfree(id);
+        if (err < 0)
+            continue;
+
+        pa_log_debug("Got %s for modifier %s: %s", item[i].id, modifier_name, value);
+        pa_proplist_sets(modifier->proplist, item[i].property, value);
+        free((void*)value);
+    }
+
+    id = pa_sprintf_malloc("%s/%s", "_conflictingdevs", modifier_name);
+    modifier->n_confdev = snd_use_case_get_list(uc_mgr, id, &modifier->conflicting_devices);
+    pa_xfree(id);
+    if (modifier->n_confdev < 0)
+        pa_log_debug("No %s for modifier %s", "_conflictingdevs", modifier_name);
+
+    id = pa_sprintf_malloc("%s/%s", "_supporteddevs", modifier_name);
+    modifier->n_suppdev = snd_use_case_get_list(uc_mgr, id, &modifier->supported_devices);
+    pa_xfree(id);
+    if (modifier->n_suppdev < 0)
+        pa_log_debug("No %s for modifier %s", "_supporteddevs", modifier_name);
+
+    return 0;
+};
+
+/* Create a list of devices for this verb */
+static int ucm_get_devices(pa_alsa_ucm_verb *verb, snd_use_case_mgr_t *uc_mgr) {
+    const char **dev_list;
+    int num_dev, i;
+
+    num_dev = snd_use_case_get_list(uc_mgr, "_devices", &dev_list);
+    if (num_dev < 0)
+        return num_dev;
+
+    for (i = 0; i < num_dev; i += 2) {
+        pa_alsa_ucm_device *d = pa_xnew0(pa_alsa_ucm_device, 1);
+
+        d->proplist = pa_proplist_new();
+        pa_proplist_sets(d->proplist, PA_ALSA_PROP_UCM_NAME, pa_strnull(dev_list[i]));
+        pa_proplist_sets(d->proplist, PA_ALSA_PROP_UCM_DESCRIPTION, pa_strna(dev_list[i + 1]));
+        d->ucm_ports = pa_dynarray_new(NULL);
+        d->hw_mute_jacks = pa_dynarray_new(NULL);
+        d->available = PA_AVAILABLE_UNKNOWN;
+
+        d->playback_volumes = pa_hashmap_new_full(pa_idxset_string_hash_func, pa_idxset_string_compare_func, pa_xfree,
+                                                  (pa_free_cb_t) ucm_volume_free);
+        d->capture_volumes = pa_hashmap_new_full(pa_idxset_string_hash_func, pa_idxset_string_compare_func, pa_xfree,
+                                                 (pa_free_cb_t) ucm_volume_free);
+
+        PA_LLIST_PREPEND(pa_alsa_ucm_device, verb->devices, d);
+    }
+
+    snd_use_case_free_list(dev_list, num_dev);
+
+    return 0;
+};
+
+static int ucm_get_modifiers(pa_alsa_ucm_verb *verb, snd_use_case_mgr_t *uc_mgr) {
+    const char **mod_list;
+    int num_mod, i;
+
+    num_mod = snd_use_case_get_list(uc_mgr, "_modifiers", &mod_list);
+    if (num_mod < 0)
+        return num_mod;
+
+    for (i = 0; i < num_mod; i += 2) {
+        pa_alsa_ucm_modifier *m;
+
+        if (!mod_list[i]) {
+            pa_log_warn("Got a modifier with a null name. Skipping.");
+            continue;
+        }
+
+        m = pa_xnew0(pa_alsa_ucm_modifier, 1);
+        m->proplist = pa_proplist_new();
+
+        pa_proplist_sets(m->proplist, PA_ALSA_PROP_UCM_NAME, mod_list[i]);
+        pa_proplist_sets(m->proplist, PA_ALSA_PROP_UCM_DESCRIPTION, pa_strna(mod_list[i + 1]));
+
+        PA_LLIST_PREPEND(pa_alsa_ucm_modifier, verb->modifiers, m);
+    }
+
+    snd_use_case_free_list(mod_list, num_mod);
+
+    return 0;
+};
+
+static void add_role_to_device(pa_alsa_ucm_device *dev, const char *dev_name, const char *role_name, const char *role) {
+    const char *cur = pa_proplist_gets(dev->proplist, role_name);
+
+    if (!cur)
+        pa_proplist_sets(dev->proplist, role_name, role);
+    else if (!pa_str_in_list_spaces(cur, role)) { /* does not exist */
+        char *value = pa_sprintf_malloc("%s %s", cur, role);
+
+        pa_proplist_sets(dev->proplist, role_name, value);
+        pa_xfree(value);
+    }
+
+    pa_log_info("Add role %s to device %s(%s), result %s", role, dev_name, role_name, pa_proplist_gets(dev->proplist,
+                role_name));
+}
+
+static void add_media_role(const char *name, pa_alsa_ucm_device *list, const char *role_name, const char *role, bool is_sink) {
+    pa_alsa_ucm_device *d;
+
+    PA_LLIST_FOREACH(d, list) {
+        const char *dev_name = pa_proplist_gets(d->proplist, PA_ALSA_PROP_UCM_NAME);
+
+        if (pa_streq(dev_name, name)) {
+            const char *sink = pa_proplist_gets(d->proplist, PA_ALSA_PROP_UCM_SINK);
+            const char *source = pa_proplist_gets(d->proplist, PA_ALSA_PROP_UCM_SOURCE);
+
+            if (is_sink && sink)
+                add_role_to_device(d, dev_name, role_name, role);
+            else if (!is_sink && source)
+                add_role_to_device(d, dev_name, role_name, role);
+            break;
+        }
+    }
+}
+
+static char *modifier_name_to_role(const char *mod_name, bool *is_sink) {
+    char *sub = NULL, *tmp;
+
+    *is_sink = false;
+
+    if (pa_startswith(mod_name, "Play")) {
+        *is_sink = true;
+        sub = pa_xstrdup(mod_name + 4);
+    } else if (pa_startswith(mod_name, "Capture"))
+        sub = pa_xstrdup(mod_name + 7);
+
+    if (!sub || !*sub) {
+        pa_xfree(sub);
+        pa_log_warn("Can't match media roles for modifier %s", mod_name);
+        return NULL;
+    }
+
+    tmp = sub;
+
+    do {
+        *tmp = tolower(*tmp);
+    } while (*(++tmp));
+
+    return sub;
+}
+
+static void ucm_set_media_roles(pa_alsa_ucm_modifier *modifier, pa_alsa_ucm_device *list, const char *mod_name) {
+    int i;
+    bool is_sink = false;
+    char *sub = NULL;
+    const char *role_name;
+
+    sub = modifier_name_to_role(mod_name, &is_sink);
+    if (!sub)
+        return;
+
+    modifier->action_direction = is_sink ? PA_DIRECTION_OUTPUT : PA_DIRECTION_INPUT;
+    modifier->media_role = sub;
+
+    role_name = is_sink ? PA_ALSA_PROP_UCM_PLAYBACK_ROLES : PA_ALSA_PROP_UCM_CAPTURE_ROLES;
+    for (i = 0; i < modifier->n_suppdev; i++) {
+        /* if modifier has no specific pcm, we add role intent to its supported devices */
+        if (!pa_proplist_gets(modifier->proplist, PA_ALSA_PROP_UCM_SINK) &&
+                !pa_proplist_gets(modifier->proplist, PA_ALSA_PROP_UCM_SOURCE))
+            add_media_role(modifier->supported_devices[i], list, role_name, sub, is_sink);
+    }
+}
+
+static void append_lost_relationship(pa_alsa_ucm_device *dev) {
+    uint32_t idx;
+    pa_alsa_ucm_device *d;
+
+    if (dev->conflicting_devices) {
+        PA_IDXSET_FOREACH(d, dev->conflicting_devices, idx) {
+            if (!d->conflicting_devices)
+                d->conflicting_devices = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+
+            if (pa_idxset_put(d->conflicting_devices, dev, NULL) == 0)
+                pa_log_warn("Add lost conflicting device %s to %s",
+                        pa_proplist_gets(dev->proplist, PA_ALSA_PROP_UCM_NAME),
+                        pa_proplist_gets(d->proplist, PA_ALSA_PROP_UCM_NAME));
+        }
+    }
+
+    if (dev->supported_devices) {
+        PA_IDXSET_FOREACH(d, dev->supported_devices, idx) {
+            if (!d->supported_devices)
+                d->supported_devices = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+
+            if (pa_idxset_put(d->supported_devices, dev, NULL) == 0)
+                pa_log_warn("Add lost supported device %s to %s",
+                        pa_proplist_gets(dev->proplist, PA_ALSA_PROP_UCM_NAME),
+                        pa_proplist_gets(d->proplist, PA_ALSA_PROP_UCM_NAME));
+        }
+    }
+}
+
+int pa_alsa_ucm_query_profiles(pa_alsa_ucm_config *ucm, int card_index) {
+    char *card_name;
+    const char **verb_list, *value;
+    int num_verbs, i, err = 0;
+
+    /* support multiple card instances, address card directly by index */
+    card_name = pa_sprintf_malloc("hw:%i", card_index);
+    if (card_name == NULL)
+        return -PA_ALSA_ERR_UNSPECIFIED;
+    err = snd_use_case_mgr_open(&ucm->ucm_mgr, card_name);
+    if (err < 0) {
+        /* fallback longname: is UCM available for this card ? */
+        pa_xfree(card_name);
+        err = snd_card_get_name(card_index, &card_name);
+        if (err < 0) {
+            pa_log("Card can't get card_name from card_index %d", card_index);
+            err = -PA_ALSA_ERR_UNSPECIFIED;
+            goto name_fail;
+        }
+
+        err = snd_use_case_mgr_open(&ucm->ucm_mgr, card_name);
+        if (err < 0) {
+            pa_log_info("UCM not available for card %s", card_name);
+            err = -PA_ALSA_ERR_UCM_OPEN;
+            goto ucm_mgr_fail;
+        }
+    }
+
+    err = snd_use_case_get(ucm->ucm_mgr, "=Linked", &value);
+    if (err >= 0) {
+        if (strcasecmp(value, "true") == 0 || strcasecmp(value, "1") == 0) {
+            free((void *)value);
+            pa_log_info("Empty (linked) UCM for card %s", card_name);
+            err = -PA_ALSA_ERR_UCM_LINKED;
+            goto ucm_verb_fail;
+        }
+        free((void *)value);
+    }
+
+    pa_log_info("UCM available for card %s", card_name);
+
+    if (snd_use_case_get(ucm->ucm_mgr, "_alibpref", &value) == 0) {
+        if (value[0]) {
+            ucm->alib_prefix = pa_xstrdup(value);
+            pa_log_debug("UCM _alibpref=%s", ucm->alib_prefix);
+        }
+        free((void *)value);
+    }
+
+    /* get a list of all UCM verbs (profiles) for this card */
+    num_verbs = snd_use_case_verb_list(ucm->ucm_mgr, &verb_list);
+    if (num_verbs < 0) {
+        pa_log("UCM verb list not found for %s", card_name);
+        err = -PA_ALSA_ERR_UNSPECIFIED;
+        goto ucm_verb_fail;
+    }
+
+    /* get the properties of each UCM verb */
+    for (i = 0; i < num_verbs; i += 2) {
+        pa_alsa_ucm_verb *verb;
+
+        /* Get devices and modifiers for each verb */
+        err = pa_alsa_ucm_get_verb(ucm->ucm_mgr, verb_list[i], verb_list[i+1], &verb);
+        if (err < 0) {
+            pa_log("Failed to get the verb %s", verb_list[i]);
+            continue;
+        }
+
+        PA_LLIST_PREPEND(pa_alsa_ucm_verb, ucm->verbs, verb);
+    }
+
+    if (!ucm->verbs) {
+        pa_log("No UCM verb is valid for %s", card_name);
+        err = -PA_ALSA_ERR_UCM_NO_VERB;
+    }
+
+    snd_use_case_free_list(verb_list, num_verbs);
+
+ucm_verb_fail:
+    if (err < 0) {
+        snd_use_case_mgr_close(ucm->ucm_mgr);
+        ucm->ucm_mgr = NULL;
+    }
+
+ucm_mgr_fail:
+    pa_xfree(card_name);
+
+name_fail:
+    return err;
+}
+
+int pa_alsa_ucm_get_verb(snd_use_case_mgr_t *uc_mgr, const char *verb_name, const char *verb_desc, pa_alsa_ucm_verb **p_verb) {
+    pa_alsa_ucm_device *d;
+    pa_alsa_ucm_modifier *mod;
+    pa_alsa_ucm_verb *verb;
+    char *value;
+    unsigned ui;
+    int err = 0;
+
+    *p_verb = NULL;
+    pa_log_info("Set UCM verb to %s", verb_name);
+    err = snd_use_case_set(uc_mgr, "_verb", verb_name);
+    if (err < 0)
+        return err;
+
+    verb = pa_xnew0(pa_alsa_ucm_verb, 1);
+    verb->proplist = pa_proplist_new();
+
+    pa_proplist_sets(verb->proplist, PA_ALSA_PROP_UCM_NAME, pa_strnull(verb_name));
+    pa_proplist_sets(verb->proplist, PA_ALSA_PROP_UCM_DESCRIPTION, pa_strna(verb_desc));
+
+    value = ucm_verb_value(uc_mgr, verb_name, "Priority");
+    if (value && !pa_atou(value, &ui))
+        verb->priority = ui > 10000 ? 10000 : ui;
+    free(value);
+
+    err = ucm_get_devices(verb, uc_mgr);
+    if (err < 0)
+        pa_log("No UCM devices for verb %s", verb_name);
+
+    err = ucm_get_modifiers(verb, uc_mgr);
+    if (err < 0)
+        pa_log("No UCM modifiers for verb %s", verb_name);
+
+    PA_LLIST_FOREACH(d, verb->devices) {
+        const char *dev_name = pa_proplist_gets(d->proplist, PA_ALSA_PROP_UCM_NAME);
+
+        /* Devices properties */
+        ucm_get_device_property(d, uc_mgr, verb, dev_name);
+    }
+    /* make conflicting or supported device mutual */
+    PA_LLIST_FOREACH(d, verb->devices)
+        append_lost_relationship(d);
+
+    PA_LLIST_FOREACH(mod, verb->modifiers) {
+        const char *mod_name = pa_proplist_gets(mod->proplist, PA_ALSA_PROP_UCM_NAME);
+
+        /* Modifier properties */
+        ucm_get_modifier_property(mod, uc_mgr, mod_name);
+
+        /* Set PA_PROP_DEVICE_INTENDED_ROLES property to devices */
+        pa_log_debug("Set media roles for verb %s, modifier %s", verb_name, mod_name);
+        ucm_set_media_roles(mod, verb->devices, mod_name);
+    }
+
+    *p_verb = verb;
+    return 0;
+}
+
+static int pa_alsa_ucm_device_cmp(const void *a, const void *b) {
+    const pa_alsa_ucm_device *d1 = *(pa_alsa_ucm_device **)a;
+    const pa_alsa_ucm_device *d2 = *(pa_alsa_ucm_device **)b;
+
+    return strcmp(pa_proplist_gets(d1->proplist, PA_ALSA_PROP_UCM_NAME), pa_proplist_gets(d2->proplist, PA_ALSA_PROP_UCM_NAME));
+}
+
+static void set_eld_devices(pa_hashmap *hash)
+{
+    pa_device_port *port;
+    pa_alsa_ucm_port_data *data;
+    pa_alsa_ucm_device *dev;
+    const char *eld_mixer_device_name;
+    void *state;
+    int idx, eld_device;
+
+    PA_HASHMAP_FOREACH(port, hash, state) {
+        data = PA_DEVICE_PORT_DATA(port);
+        eld_mixer_device_name = NULL;
+        eld_device = -1;
+        PA_DYNARRAY_FOREACH(dev, data->devices, idx) {
+            if (dev->eld_device >= 0 && dev->eld_mixer_device_name) {
+                if (eld_device >= 0 && eld_device != dev->eld_device) {
+                    pa_log_error("The ELD device is already set!");
+                } else if (eld_mixer_device_name && pa_streq(dev->eld_mixer_device_name, eld_mixer_device_name)) {
+                    pa_log_error("The ELD mixer device is already set (%s, %s)!", dev->eld_mixer_device_name, dev->eld_mixer_device_name);
+                } else {
+                    eld_mixer_device_name = dev->eld_mixer_device_name;
+                    eld_device = dev->eld_device;
+                }
+            }
+        }
+        data->eld_device = eld_device;
+        if (data->eld_mixer_device_name)
+            pa_xfree(data->eld_mixer_device_name);
+        data->eld_mixer_device_name = pa_xstrdup(eld_mixer_device_name);
+    }
+}
+
+static void update_mixer_paths(pa_hashmap *ports, const char *profile) {
+    pa_device_port *port;
+    pa_alsa_ucm_port_data *data;
+    void *state;
+
+    /* select volume controls on ports */
+    PA_HASHMAP_FOREACH(port, ports, state) {
+        pa_log_info("Updating mixer path for %s: %s", profile, port->name);
+        data = PA_DEVICE_PORT_DATA(port);
+        data->path = pa_hashmap_get(data->paths, profile);
+    }
+}
+
+static void probe_volumes(pa_hashmap *hash, bool is_sink, snd_pcm_t *pcm_handle, pa_hashmap *mixers, bool ignore_dB) {
+    pa_device_port *port;
+    pa_alsa_path *path;
+    pa_alsa_ucm_port_data *data;
+    pa_alsa_ucm_device *dev;
+    snd_mixer_t *mixer_handle;
+    const char *profile, *mdev, *mdev2;
+    void *state, *state2;
+    int idx;
+
+    PA_HASHMAP_FOREACH(port, hash, state) {
+        data = PA_DEVICE_PORT_DATA(port);
+
+        mdev = NULL;
+        PA_DYNARRAY_FOREACH(dev, data->devices, idx) {
+            mdev2 = get_mixer_device(dev, is_sink);
+            if (mdev && mdev2 && !pa_streq(mdev, mdev2)) {
+                pa_log_error("Two mixer device names found ('%s', '%s'), using s/w volume", mdev, mdev2);
+                goto fail;
+            }
+            if (mdev2)
+                mdev = mdev2;
+        }
+
+        if (mdev == NULL || !(mixer_handle = pa_alsa_open_mixer_by_name(mixers, mdev, true))) {
+            pa_log_error("Failed to find a working mixer device (%s).", mdev);
+            goto fail;
+        }
+
+        PA_HASHMAP_FOREACH_KV(profile, path, data->paths, state2) {
+            if (pa_alsa_path_probe(path, NULL, mixer_handle, ignore_dB) < 0) {
+                pa_log_warn("Could not probe path: %s, using s/w volume", path->name);
+                pa_hashmap_remove(data->paths, profile);
+            } else if (!path->has_volume && !path->has_mute) {
+                pa_log_warn("Path %s is not a volume or mute control", path->name);
+                pa_hashmap_remove(data->paths, profile);
+            } else
+                pa_log_debug("Set up h/w %s using '%s' for %s:%s", path->has_volume ? "volume" : "mute",
+                                path->name, profile, port->name);
+        }
+    }
+
+    return;
+
+fail:
+    /* We could not probe the paths we created. Free them and revert to software volumes. */
+    PA_HASHMAP_FOREACH(port, hash, state) {
+        data = PA_DEVICE_PORT_DATA(port);
+        pa_hashmap_remove_all(data->paths);
+    }
+}
+
+static void ucm_add_port_combination(
+        pa_hashmap *hash,
+        pa_alsa_ucm_mapping_context *context,
+        bool is_sink,
+        pa_alsa_ucm_device **pdevices,
+        int num,
+        pa_hashmap *ports,
+        pa_card_profile *cp,
+        pa_core *core) {
+
+    pa_device_port *port;
+    int i;
+    unsigned priority;
+    double prio2;
+    char *name, *desc;
+    const char *dev_name;
+    const char *direction;
+    const char *profile;
+    pa_alsa_ucm_device *sorted[num], *dev;
+    pa_alsa_ucm_port_data *data;
+    pa_alsa_ucm_volume *vol;
+    pa_alsa_jack *jack, *jack2;
+    pa_device_port_type_t type, type2;
+    void *state;
+
+    for (i = 0; i < num; i++)
+        sorted[i] = pdevices[i];
+
+    /* Sort by alphabetical order so as to have a deterministic naming scheme
+     * for combination ports */
+    qsort(&sorted[0], num, sizeof(pa_alsa_ucm_device *), pa_alsa_ucm_device_cmp);
+
+    dev = sorted[0];
+    dev_name = pa_proplist_gets(dev->proplist, PA_ALSA_PROP_UCM_NAME);
+
+    name = pa_sprintf_malloc("%s%s", is_sink ? PA_UCM_PRE_TAG_OUTPUT : PA_UCM_PRE_TAG_INPUT, dev_name);
+    desc = num == 1 ? pa_xstrdup(pa_proplist_gets(dev->proplist, PA_ALSA_PROP_UCM_DESCRIPTION))
+            : pa_sprintf_malloc("Combination port for %s", dev_name);
+
+    priority = is_sink ? dev->playback_priority : dev->capture_priority;
+    prio2 = (priority == 0 ? 0 : 1.0/priority);
+    jack = ucm_get_jack(context->ucm, dev);
+    type = dev->type;
+
+    for (i = 1; i < num; i++) {
+        char *tmp;
+
+        dev = sorted[i];
+        dev_name = pa_proplist_gets(dev->proplist, PA_ALSA_PROP_UCM_NAME);
+
+        tmp = pa_sprintf_malloc("%s+%s", name, dev_name);
+        pa_xfree(name);
+        name = tmp;
+
+        tmp = pa_sprintf_malloc("%s,%s", desc, dev_name);
+        pa_xfree(desc);
+        desc = tmp;
+
+        priority = is_sink ? dev->playback_priority : dev->capture_priority;
+        if (priority != 0 && prio2 > 0)
+            prio2 += 1.0/priority;
+
+        jack2 = ucm_get_jack(context->ucm, dev);
+        if (jack2) {
+            if (jack && jack != jack2)
+                pa_log_warn("Multiple jacks per combined device '%s': '%s' '%s'", name, jack->name, jack2->name);
+            jack = jack2;
+        }
+
+        type2 = dev->type;
+        if (type2 != PA_DEVICE_PORT_TYPE_UNKNOWN) {
+            if (type != PA_DEVICE_PORT_TYPE_UNKNOWN && type != type2)
+                pa_log_warn("Multiple device types per combined device '%s': %d %d", name, type, type2);
+            type = type2;
+        }
+    }
+
+    /* Make combination ports always have lower priority, and use the formula
+       1/p = 1/p1 + 1/p2 + ... 1/pn.
+       This way, the result will always be less than the individual components,
+       yet higher components will lead to higher result. */
+
+    if (num > 1)
+        priority = prio2 > 0 ? 1.0/prio2 : 0;
+
+    port = pa_hashmap_get(ports, name);
+    if (!port) {
+        pa_device_port_new_data port_data;
+
+        pa_device_port_new_data_init(&port_data);
+        pa_device_port_new_data_set_name(&port_data, name);
+        pa_device_port_new_data_set_description(&port_data, desc);
+        pa_device_port_new_data_set_type(&port_data, type);
+        pa_device_port_new_data_set_direction(&port_data, is_sink ? PA_DIRECTION_OUTPUT : PA_DIRECTION_INPUT);
+        if (jack)
+            pa_device_port_new_data_set_availability_group(&port_data, jack->name);
+
+        port = pa_device_port_new(core, &port_data, sizeof(pa_alsa_ucm_port_data));
+        pa_device_port_new_data_done(&port_data);
+
+        data = PA_DEVICE_PORT_DATA(port);
+        ucm_port_data_init(data, context->ucm, port, pdevices, num);
+        port->impl_free = ucm_port_data_free;
+
+        pa_hashmap_put(ports, port->name, port);
+        pa_log_debug("Add port %s: %s", port->name, port->description);
+
+        if (num == 1) {
+            /* To keep things simple and not worry about stacking controls, we only support hardware volumes on non-combination
+             * ports. */
+            PA_HASHMAP_FOREACH_KV(profile, vol, is_sink ? dev->playback_volumes : dev->capture_volumes, state) {
+                pa_alsa_path *path = pa_alsa_path_synthesize(vol->mixer_elem,
+                                                             is_sink ? PA_ALSA_DIRECTION_OUTPUT : PA_ALSA_DIRECTION_INPUT);
+
+                if (!path)
+                    pa_log_warn("Failed to set up volume control: %s", vol->mixer_elem);
+                else {
+                    if (vol->master_elem) {
+                        pa_alsa_element *e = pa_alsa_element_get(path, vol->master_elem, false);
+                        e->switch_use = PA_ALSA_SWITCH_MUTE;
+                        e->volume_use = PA_ALSA_VOLUME_MERGE;
+                    }
+
+                    pa_hashmap_put(data->paths, pa_xstrdup(profile), path);
+
+                    /* Add path also to already created empty path set */
+                    dev = sorted[0];
+                    if (is_sink)
+                        pa_hashmap_put(dev->playback_mapping->output_path_set->paths, pa_xstrdup(vol->mixer_elem), path);
+                    else
+                        pa_hashmap_put(dev->capture_mapping->input_path_set->paths, pa_xstrdup(vol->mixer_elem), path);
+                }
+            }
+        }
+    }
+
+    port->priority = priority;
+
+    pa_xfree(name);
+    pa_xfree(desc);
+
+    direction = is_sink ? "output" : "input";
+    pa_log_debug("Port %s direction %s, priority %d", port->name, direction, priority);
+
+    if (cp) {
+        pa_log_debug("Adding profile %s to port %s.", cp->name, port->name);
+        pa_hashmap_put(port->profiles, cp->name, cp);
+    }
+
+    if (hash) {
+        pa_hashmap_put(hash, port->name, port);
+    }
+}
+
+static int ucm_port_contains(const char *port_name, const char *dev_name, bool is_sink) {
+    int ret = 0;
+    const char *r;
+    const char *state = NULL;
+    size_t len;
+
+    if (!port_name || !dev_name)
+        return false;
+
+    port_name += is_sink ? strlen(PA_UCM_PRE_TAG_OUTPUT) : strlen(PA_UCM_PRE_TAG_INPUT);
+
+    while ((r = pa_split_in_place(port_name, "+", &len, &state))) {
+        if (strlen(dev_name) == len && !strncmp(r, dev_name, len)) {
+            ret = 1;
+            break;
+        }
+    }
+
+    return ret;
+}
+
+static int ucm_check_conformance(
+        pa_alsa_ucm_mapping_context *context,
+        pa_alsa_ucm_device **pdevices,
+        int dev_num,
+        pa_alsa_ucm_device *dev) {
+
+    uint32_t idx;
+    pa_alsa_ucm_device *d;
+    int i;
+
+    pa_assert(dev);
+
+    pa_log_debug("Check device %s conformance with %d other devices",
+            pa_proplist_gets(dev->proplist, PA_ALSA_PROP_UCM_NAME), dev_num);
+    if (dev_num == 0) {
+        pa_log_debug("First device in combination, number 1");
+        return 1;
+    }
+
+    if (dev->conflicting_devices) { /* the device defines conflicting devices */
+        PA_IDXSET_FOREACH(d, dev->conflicting_devices, idx) {
+            for (i = 0; i < dev_num; i++) {
+                if (pdevices[i] == d) {
+                    pa_log_debug("Conflicting device found");
+                    return 0;
+                }
+            }
+        }
+    } else if (dev->supported_devices) { /* the device defines supported devices */
+        for (i = 0; i < dev_num; i++) {
+            if (!ucm_device_exists(dev->supported_devices, pdevices[i])) {
+                pa_log_debug("Supported device not found");
+                return 0;
+            }
+        }
+    } else { /* not support any other devices */
+        pa_log_debug("Not support any other devices");
+        return 0;
+    }
+
+    pa_log_debug("Device added to combination, number %d", dev_num + 1);
+    return 1;
+}
+
+static inline pa_alsa_ucm_device *get_next_device(pa_idxset *idxset, uint32_t *idx) {
+    pa_alsa_ucm_device *dev;
+
+    if (*idx == PA_IDXSET_INVALID)
+        dev = pa_idxset_first(idxset, idx);
+    else
+        dev = pa_idxset_next(idxset, idx);
+
+    return dev;
+}
+
+static void ucm_add_ports_combination(
+        pa_hashmap *hash,
+        pa_alsa_ucm_mapping_context *context,
+        bool is_sink,
+        pa_alsa_ucm_device **pdevices,
+        int dev_num,
+        uint32_t map_index,
+        pa_hashmap *ports,
+        pa_card_profile *cp,
+        pa_core *core) {
+
+    pa_alsa_ucm_device *dev;
+    uint32_t idx = map_index;
+
+    if ((dev = get_next_device(context->ucm_devices, &idx)) == NULL)
+        return;
+
+    /* check if device at map_index can combine with existing devices combination */
+    if (ucm_check_conformance(context, pdevices, dev_num, dev)) {
+        /* add device at map_index to devices combination */
+        pdevices[dev_num] = dev;
+        /* add current devices combination as a new port */
+        ucm_add_port_combination(hash, context, is_sink, pdevices, dev_num + 1, ports, cp, core);
+        /* try more elements combination */
+        ucm_add_ports_combination(hash, context, is_sink, pdevices, dev_num + 1, idx, ports, cp, core);
+    }
+
+    /* try other device with current elements number */
+    ucm_add_ports_combination(hash, context, is_sink, pdevices, dev_num, idx, ports, cp, core);
+}
+
+static char* merge_roles(const char *cur, const char *add) {
+    char *r, *ret;
+    const char *state = NULL;
+
+    if (add == NULL)
+        return pa_xstrdup(cur);
+    else if (cur == NULL)
+        return pa_xstrdup(add);
+
+    ret = pa_xstrdup(cur);
+
+    while ((r = pa_split_spaces(add, &state))) {
+        char *value;
+
+        if (!pa_str_in_list_spaces(ret, r))
+            value = pa_sprintf_malloc("%s %s", ret, r);
+        else {
+            pa_xfree(r);
+            continue;
+        }
+
+        pa_xfree(ret);
+        ret = value;
+        pa_xfree(r);
+    }
+
+    return ret;
+}
+
+void pa_alsa_ucm_add_ports_combination(
+        pa_hashmap *p,
+        pa_alsa_ucm_mapping_context *context,
+        bool is_sink,
+        pa_hashmap *ports,
+        pa_card_profile *cp,
+        pa_core *core) {
+
+    pa_alsa_ucm_device **pdevices;
+
+    pa_assert(context->ucm_devices);
+
+    if (pa_idxset_size(context->ucm_devices) > 0) {
+        pdevices = pa_xnew(pa_alsa_ucm_device *, pa_idxset_size(context->ucm_devices));
+        ucm_add_ports_combination(p, context, is_sink, pdevices, 0, PA_IDXSET_INVALID, ports, cp, core);
+        pa_xfree(pdevices);
+    }
+
+    /* ELD devices */
+    set_eld_devices(ports);
+}
+
+void pa_alsa_ucm_add_ports(
+        pa_hashmap **p,
+        pa_proplist *proplist,
+        pa_alsa_ucm_mapping_context *context,
+        bool is_sink,
+        pa_card *card,
+        snd_pcm_t *pcm_handle,
+        bool ignore_dB) {
+
+    uint32_t idx;
+    char *merged_roles;
+    const char *role_name = is_sink ? PA_ALSA_PROP_UCM_PLAYBACK_ROLES : PA_ALSA_PROP_UCM_CAPTURE_ROLES;
+    pa_alsa_ucm_device *dev;
+    pa_alsa_ucm_modifier *mod;
+    char *tmp;
+
+    pa_assert(p);
+    pa_assert(*p);
+
+    /* add ports first */
+    pa_alsa_ucm_add_ports_combination(*p, context, is_sink, card->ports, NULL, card->core);
+
+    /* now set up volume paths if any */
+    probe_volumes(*p, is_sink, pcm_handle, context->ucm->mixers, ignore_dB);
+
+    /* probe_volumes() removes per-profile paths from ports if probing them
+     * fails. The path for the current profile is cached in
+     * pa_alsa_ucm_port_data.path, which is not cleared by probe_volumes() if
+     * the path gets removed, so we have to call update_mixer_paths() here to
+     * unset the cached path if needed. */
+    if (card->card.active_profile_index < card->card.n_profiles)
+        update_mixer_paths(*p, card->card.profiles[card->card.active_profile_index]->name);
+
+    /* then set property PA_PROP_DEVICE_INTENDED_ROLES */
+    merged_roles = pa_xstrdup(pa_proplist_gets(proplist, PA_PROP_DEVICE_INTENDED_ROLES));
+    PA_IDXSET_FOREACH(dev, context->ucm_devices, idx) {
+        const char *roles = pa_proplist_gets(dev->proplist, role_name);
+        tmp = merge_roles(merged_roles, roles);
+        pa_xfree(merged_roles);
+        merged_roles = tmp;
+    }
+
+    if (context->ucm_modifiers)
+        PA_IDXSET_FOREACH(mod, context->ucm_modifiers, idx) {
+            tmp = merge_roles(merged_roles, mod->media_role);
+            pa_xfree(merged_roles);
+            merged_roles = tmp;
+        }
+
+    if (merged_roles)
+        pa_proplist_sets(proplist, PA_PROP_DEVICE_INTENDED_ROLES, merged_roles);
+
+    pa_log_info("ALSA device %s roles: %s", pa_proplist_gets(proplist, PA_PROP_DEVICE_STRING), pa_strnull(merged_roles));
+    pa_xfree(merged_roles);
+}
+
+/* Change UCM verb and device to match selected card profile */
+int pa_alsa_ucm_set_profile(pa_alsa_ucm_config *ucm, pa_card *card, const char *new_profile, const char *old_profile) {
+    int ret = 0;
+    const char *profile;
+    pa_alsa_ucm_verb *verb;
+
+    if (new_profile == old_profile)
+        return ret;
+    else if (new_profile == NULL || old_profile == NULL)
+        profile = new_profile ? new_profile : SND_USE_CASE_VERB_INACTIVE;
+    else if (!pa_streq(new_profile, old_profile))
+        profile = new_profile;
+    else
+        return ret;
+
+    /* change verb */
+    pa_log_info("Set UCM verb to %s", profile);
+    if ((ret = snd_use_case_set(ucm->ucm_mgr, "_verb", profile)) < 0) {
+        pa_log("Failed to set verb %s: %s", profile, snd_strerror(ret));
+    }
+
+    /* find active verb */
+    ucm->active_verb = NULL;
+    PA_LLIST_FOREACH(verb, ucm->verbs) {
+        const char *verb_name;
+        verb_name = pa_proplist_gets(verb->proplist, PA_ALSA_PROP_UCM_NAME);
+        if (pa_streq(verb_name, profile)) {
+            ucm->active_verb = verb;
+            break;
+        }
+    }
+
+    update_mixer_paths(card->ports, profile);
+    return ret;
+}
+
+int pa_alsa_ucm_set_port(pa_alsa_ucm_mapping_context *context, pa_device_port *port, bool is_sink) {
+    int i;
+    int ret = 0;
+    pa_alsa_ucm_config *ucm;
+    const char **enable_devs;
+    int enable_num = 0;
+    uint32_t idx;
+    pa_alsa_ucm_device *dev;
+
+    pa_assert(context && context->ucm);
+
+    ucm = context->ucm;
+    pa_assert(ucm->ucm_mgr);
+
+    enable_devs = pa_xnew(const char *, pa_idxset_size(context->ucm_devices));
+
+    /* first disable then enable */
+    PA_IDXSET_FOREACH(dev, context->ucm_devices, idx) {
+        const char *dev_name = pa_proplist_gets(dev->proplist, PA_ALSA_PROP_UCM_NAME);
+
+        if (ucm_port_contains(port->name, dev_name, is_sink))
+            enable_devs[enable_num++] = dev_name;
+        else {
+            pa_log_debug("Disable ucm device %s", dev_name);
+            if (snd_use_case_set(ucm->ucm_mgr, "_disdev", dev_name) > 0) {
+                pa_log("Failed to disable ucm device %s", dev_name);
+                ret = -1;
+                break;
+            }
+        }
+    }
+
+    for (i = 0; i < enable_num; i++) {
+        pa_log_debug("Enable ucm device %s", enable_devs[i]);
+        if (snd_use_case_set(ucm->ucm_mgr, "_enadev", enable_devs[i]) < 0) {
+            pa_log("Failed to enable ucm device %s", enable_devs[i]);
+            ret = -1;
+            break;
+        }
+    }
+
+    pa_xfree(enable_devs);
+
+    return ret;
+}
+
+static void ucm_add_mapping(pa_alsa_profile *p, pa_alsa_mapping *m) {
+
+    pa_alsa_path_set *ps;
+
+    /* create empty path set for the future path additions */
+    ps = pa_xnew0(pa_alsa_path_set, 1);
+    ps->direction = m->direction;
+    ps->paths = pa_hashmap_new_full(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func, pa_xfree,
+                                    (pa_free_cb_t) pa_alsa_path_free);
+
+    switch (m->direction) {
+        case PA_ALSA_DIRECTION_ANY:
+            pa_idxset_put(p->output_mappings, m, NULL);
+            pa_idxset_put(p->input_mappings, m, NULL);
+            m->output_path_set = ps;
+            m->input_path_set = ps;
+            break;
+        case PA_ALSA_DIRECTION_OUTPUT:
+            pa_idxset_put(p->output_mappings, m, NULL);
+            m->output_path_set = ps;
+            break;
+        case PA_ALSA_DIRECTION_INPUT:
+            pa_idxset_put(p->input_mappings, m, NULL);
+            m->input_path_set = ps;
+            break;
+    }
+}
+
+static void alsa_mapping_add_ucm_device(pa_alsa_mapping *m, pa_alsa_ucm_device *device) {
+    char *cur_desc;
+    const char *new_desc, *mdev;
+    bool is_sink = m->direction == PA_ALSA_DIRECTION_OUTPUT;
+
+    pa_idxset_put(m->ucm_context.ucm_devices, device, NULL);
+
+    new_desc = pa_proplist_gets(device->proplist, PA_ALSA_PROP_UCM_DESCRIPTION);
+    cur_desc = m->description;
+    if (cur_desc)
+        m->description = pa_sprintf_malloc("%s + %s", cur_desc, new_desc);
+    else
+        m->description = pa_xstrdup(new_desc);
+    pa_xfree(cur_desc);
+
+    /* walk around null case */
+    m->description = m->description ? m->description : pa_xstrdup("");
+
+    /* save mapping to ucm device */
+    if (is_sink)
+        device->playback_mapping = m;
+    else
+        device->capture_mapping = m;
+
+    mdev = get_mixer_device(device, is_sink);
+    if (mdev)
+        pa_proplist_sets(m->proplist, "alsa.mixer_device", mdev);
+}
+
+static void alsa_mapping_add_ucm_modifier(pa_alsa_mapping *m, pa_alsa_ucm_modifier *modifier) {
+    char *cur_desc;
+    const char *new_desc, *mod_name, *channel_str;
+    uint32_t channels = 0;
+
+    pa_idxset_put(m->ucm_context.ucm_modifiers, modifier, NULL);
+
+    new_desc = pa_proplist_gets(modifier->proplist, PA_ALSA_PROP_UCM_DESCRIPTION);
+    cur_desc = m->description;
+    if (cur_desc)
+        m->description = pa_sprintf_malloc("%s + %s", cur_desc, new_desc);
+    else
+        m->description = pa_xstrdup(new_desc);
+    pa_xfree(cur_desc);
+
+    m->description = m->description ? m->description : pa_xstrdup("");
+
+    /* Modifier sinks should not be routed to by default */
+    m->priority = 0;
+
+    mod_name = pa_proplist_gets(modifier->proplist, PA_ALSA_PROP_UCM_NAME);
+    pa_proplist_sets(m->proplist, PA_ALSA_PROP_UCM_MODIFIER, mod_name);
+
+    /* save mapping to ucm modifier */
+    if (m->direction == PA_ALSA_DIRECTION_OUTPUT) {
+        modifier->playback_mapping = m;
+        channel_str = pa_proplist_gets(modifier->proplist, PA_ALSA_PROP_UCM_PLAYBACK_CHANNELS);
+    } else {
+        modifier->capture_mapping = m;
+        channel_str = pa_proplist_gets(modifier->proplist, PA_ALSA_PROP_UCM_CAPTURE_CHANNELS);
+    }
+
+    if (channel_str) {
+        /* FIXME: channel_str is unsanitized input from the UCM configuration,
+         * we should do proper error handling instead of asserting.
+         * https://bugs.freedesktop.org/show_bug.cgi?id=71823 */
+        pa_assert_se(pa_atou(channel_str, &channels) == 0 && pa_channels_valid(channels));
+        pa_log_debug("Got channel count %" PRIu32 " for modifier", channels);
+    }
+
+    if (channels)
+        pa_channel_map_init_extend(&m->channel_map, channels, PA_CHANNEL_MAP_ALSA);
+    else
+        pa_channel_map_init(&m->channel_map);
+}
+
+static pa_alsa_mapping* ucm_alsa_mapping_get(pa_alsa_ucm_config *ucm, pa_alsa_profile_set *ps, const char *verb_name, const char *device_str, bool is_sink) {
+    pa_alsa_mapping *m;
+    char *mapping_name;
+    size_t ucm_alibpref_len = 0;
+
+    /* find private alsa-lib's configuration device prefix */
+
+    if (ucm->alib_prefix && pa_startswith(device_str, ucm->alib_prefix))
+        ucm_alibpref_len = strlen(ucm->alib_prefix);
+
+    mapping_name = pa_sprintf_malloc("Mapping %s: %s: %s", verb_name, device_str + ucm_alibpref_len, is_sink ? "sink" : "source");
+
+    m = pa_alsa_mapping_get(ps, mapping_name);
+
+    if (!m)
+        pa_log("No mapping for %s", mapping_name);
+
+    pa_xfree(mapping_name);
+
+    return m;
+}
+
+static int ucm_create_mapping_direction(
+        pa_alsa_ucm_config *ucm,
+        pa_alsa_profile_set *ps,
+        pa_alsa_profile *p,
+        pa_alsa_ucm_device *device,
+        const char *verb_name,
+        const char *device_name,
+        const char *device_str,
+        bool is_sink) {
+
+    pa_alsa_mapping *m;
+    unsigned priority, rate, channels;
+
+    m = ucm_alsa_mapping_get(ucm, ps, verb_name, device_str, is_sink);
+
+    if (!m)
+        return -1;
+
+    pa_log_debug("UCM mapping: %s dev %s", m->name, device_name);
+
+    priority = is_sink ? device->playback_priority : device->capture_priority;
+    rate = is_sink ? device->playback_rate : device->capture_rate;
+    channels = is_sink ? device->playback_channels : device->capture_channels;
+
+    if (!m->ucm_context.ucm_devices) {   /* new mapping */
+        m->ucm_context.ucm_devices = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+        m->ucm_context.ucm = ucm;
+        m->ucm_context.direction = is_sink ? PA_DIRECTION_OUTPUT : PA_DIRECTION_INPUT;
+
+        m->device_strings = pa_xnew0(char*, 2);
+        m->device_strings[0] = pa_xstrdup(device_str);
+        m->direction = is_sink ? PA_ALSA_DIRECTION_OUTPUT : PA_ALSA_DIRECTION_INPUT;
+
+        ucm_add_mapping(p, m);
+        if (rate)
+            m->sample_spec.rate = rate;
+        pa_channel_map_init_extend(&m->channel_map, channels, PA_CHANNEL_MAP_ALSA);
+    }
+
+    /* mapping priority is the highest one of ucm devices */
+    if (priority > m->priority)
+        m->priority = priority;
+
+    /* mapping channels is the lowest one of ucm devices */
+    if (channels < m->channel_map.channels)
+        pa_channel_map_init_extend(&m->channel_map, channels, PA_CHANNEL_MAP_ALSA);
+
+    alsa_mapping_add_ucm_device(m, device);
+
+    return 0;
+}
+
+static int ucm_create_mapping_for_modifier(
+        pa_alsa_ucm_config *ucm,
+        pa_alsa_profile_set *ps,
+        pa_alsa_profile *p,
+        pa_alsa_ucm_modifier *modifier,
+        const char *verb_name,
+        const char *mod_name,
+        const char *device_str,
+        bool is_sink) {
+
+    pa_alsa_mapping *m;
+
+    m = ucm_alsa_mapping_get(ucm, ps, verb_name, device_str, is_sink);
+
+    if (!m)
+        return -1;
+
+    pa_log_info("UCM mapping: %s modifier %s", m->name, mod_name);
+
+    if (!m->ucm_context.ucm_devices && !m->ucm_context.ucm_modifiers) {   /* new mapping */
+        m->ucm_context.ucm_devices = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+        m->ucm_context.ucm_modifiers = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+        m->ucm_context.ucm = ucm;
+        m->ucm_context.direction = is_sink ? PA_DIRECTION_OUTPUT : PA_DIRECTION_INPUT;
+
+        m->device_strings = pa_xnew0(char*, 2);
+        m->device_strings[0] = pa_xstrdup(device_str);
+        m->direction = is_sink ? PA_ALSA_DIRECTION_OUTPUT : PA_ALSA_DIRECTION_INPUT;
+        /* Modifier sinks should not be routed to by default */
+        m->priority = 0;
+
+        ucm_add_mapping(p, m);
+    } else if (!m->ucm_context.ucm_modifiers) /* share pcm with device */
+        m->ucm_context.ucm_modifiers = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+
+    alsa_mapping_add_ucm_modifier(m, modifier);
+
+    return 0;
+}
+
+static int ucm_create_mapping(
+        pa_alsa_ucm_config *ucm,
+        pa_alsa_profile_set *ps,
+        pa_alsa_profile *p,
+        pa_alsa_ucm_device *device,
+        const char *verb_name,
+        const char *device_name,
+        const char *sink,
+        const char *source) {
+
+    int ret = 0;
+
+    if (!sink && !source) {
+        pa_log("No sink and source at %s: %s", verb_name, device_name);
+        return -1;
+    }
+
+    if (sink)
+        ret = ucm_create_mapping_direction(ucm, ps, p, device, verb_name, device_name, sink, true);
+    if (ret == 0 && source)
+        ret = ucm_create_mapping_direction(ucm, ps, p, device, verb_name, device_name, source, false);
+
+    return ret;
+}
+
+static pa_alsa_jack* ucm_get_jack(pa_alsa_ucm_config *ucm, pa_alsa_ucm_device *device) {
+    pa_alsa_jack *j;
+    const char *device_name;
+    const char *jack_control;
+    const char *mixer_device_name;
+    char *name;
+
+    pa_assert(ucm);
+    pa_assert(device);
+
+    device_name = pa_proplist_gets(device->proplist, PA_ALSA_PROP_UCM_NAME);
+
+    jack_control = pa_proplist_gets(device->proplist, PA_ALSA_PROP_UCM_JACK_CONTROL);
+    if (jack_control) {
+#if SND_LIB_VERSION >= 0x10201
+        snd_ctl_elem_id_t *ctl;
+        int err, index;
+        snd_ctl_elem_id_alloca(&ctl);
+        err = snd_use_case_parse_ctl_elem_id(ctl, "JackControl", jack_control);
+        if (err < 0)
+            return NULL;
+        jack_control = snd_ctl_elem_id_get_name(ctl);
+        index = snd_ctl_elem_id_get_index(ctl);
+        if (index > 0) {
+            pa_log("[%s] Invalid JackControl index value: \"%s\",%d", device_name, jack_control, index);
+            return NULL;
+        }
+#else
+#warning "Upgrade to alsa-lib 1.2.1!"
+#endif
+        if (!pa_endswith(jack_control, " Jack")) {
+            pa_log("[%s] Invalid JackControl value: \"%s\"", device_name, jack_control);
+            return NULL;
+        }
+
+        /* pa_alsa_jack_new() expects a jack name without " Jack" at the
+         * end, so drop the trailing " Jack". */
+        name = pa_xstrndup(jack_control, strlen(jack_control) - 5);
+    } else {
+        /* The jack control hasn't been explicitly configured, fail. */
+        return NULL;
+    }
+
+    PA_LLIST_FOREACH(j, ucm->jacks)
+        if (pa_streq(j->name, name))
+            goto finish;
+
+    mixer_device_name = get_jack_mixer_device(device, true);
+    if (!mixer_device_name)
+        mixer_device_name = get_jack_mixer_device(device, false);
+    if (!mixer_device_name) {
+        pa_log("[%s] No mixer device name for JackControl \"%s\"", device_name, jack_control);
+        j = NULL;
+        goto finish;
+    }
+    j = pa_alsa_jack_new(NULL, mixer_device_name, name, 0);
+    PA_LLIST_PREPEND(pa_alsa_jack, ucm->jacks, j);
+
+finish:
+    pa_xfree(name);
+
+    return j;
+}
+
+static int ucm_create_profile(
+        pa_alsa_ucm_config *ucm,
+        pa_alsa_profile_set *ps,
+        pa_alsa_ucm_verb *verb,
+        const char *verb_name,
+        const char *verb_desc) {
+
+    pa_alsa_profile *p;
+    pa_alsa_ucm_device *dev;
+    pa_alsa_ucm_modifier *mod;
+    int i = 0;
+    const char *name, *sink, *source;
+    unsigned int priority;
+
+    pa_assert(ps);
+
+    if (pa_hashmap_get(ps->profiles, verb_name)) {
+        pa_log("Verb %s already exists", verb_name);
+        return -1;
+    }
+
+    p = pa_xnew0(pa_alsa_profile, 1);
+    p->profile_set = ps;
+    p->name = pa_xstrdup(verb_name);
+    p->description = pa_xstrdup(verb_desc);
+
+    p->output_mappings = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+    p->input_mappings = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
+
+    p->supported = true;
+    pa_hashmap_put(ps->profiles, p->name, p);
+
+    /* TODO: get profile priority from policy management */
+    priority = verb->priority;
+
+    if (priority == 0) {
+        char *verb_cmp, *c;
+        c = verb_cmp = pa_xstrdup(verb_name);
+        while (*c) {
+            if (*c == '_') *c = ' ';
+            c++;
+        }
+        for (i = 0; verb_info[i].id; i++) {
+            if (strcasecmp(verb_info[i].id, verb_cmp) == 0) {
+                priority = verb_info[i].priority;
+                break;
+            }
+        }
+        pa_xfree(verb_cmp);
+    }
+
+    p->priority = priority;
+
+    PA_LLIST_FOREACH(dev, verb->devices) {
+        pa_alsa_jack *jack;
+        const char *jack_hw_mute;
+
+        name = pa_proplist_gets(dev->proplist, PA_ALSA_PROP_UCM_NAME);
+
+        sink = pa_proplist_gets(dev->proplist, PA_ALSA_PROP_UCM_SINK);
+        source = pa_proplist_gets(dev->proplist, PA_ALSA_PROP_UCM_SOURCE);
+
+        ucm_create_mapping(ucm, ps, p, dev, verb_name, name, sink, source);
+
+        jack = ucm_get_jack(ucm, dev);
+        if (jack)
+            device_set_jack(dev, jack);
+
+        /* JackHWMute contains a list of device names. Each listed device must
+         * be associated with the jack object that we just created. */
+        jack_hw_mute = pa_proplist_gets(dev->proplist, PA_ALSA_PROP_UCM_JACK_HW_MUTE);
+        if (jack_hw_mute && !jack) {
+            pa_log("[%s] JackHWMute set, but JackControl is missing", name);
+            jack_hw_mute = NULL;
+        }
+        if (jack_hw_mute) {
+            char *hw_mute_device_name;
+            const char *state = NULL;
+
+            while ((hw_mute_device_name = ucm_split_devnames(jack_hw_mute, &state))) {
+                pa_alsa_ucm_verb *verb2;
+                bool device_found = false;
+
+                /* Search the referenced device from all verbs. If there are
+                 * multiple verbs that have a device with this name, we add the
+                 * hw mute association to each of those devices. */
+                PA_LLIST_FOREACH(verb2, ucm->verbs) {
+                    pa_alsa_ucm_device *hw_mute_device;
+
+                    hw_mute_device = verb_find_device(verb2, hw_mute_device_name);
+                    if (hw_mute_device) {
+                        device_found = true;
+                        device_add_hw_mute_jack(hw_mute_device, jack);
+                    }
+                }
+
+                if (!device_found)
+                    pa_log("[%s] JackHWMute references an unknown device: %s", name, hw_mute_device_name);
+
+                pa_xfree(hw_mute_device_name);
+            }
+        }
+    }
+
+    /* Now find modifiers that have their own PlaybackPCM and create
+     * separate sinks for them. */
+    PA_LLIST_FOREACH(mod, verb->modifiers) {
+        name = pa_proplist_gets(mod->proplist, PA_ALSA_PROP_UCM_NAME);
+
+        sink = pa_proplist_gets(mod->proplist, PA_ALSA_PROP_UCM_SINK);
+        source = pa_proplist_gets(mod->proplist, PA_ALSA_PROP_UCM_SOURCE);
+
+        if (sink)
+            ucm_create_mapping_for_modifier(ucm, ps, p, mod, verb_name, name, sink, true);
+        else if (source)
+            ucm_create_mapping_for_modifier(ucm, ps, p, mod, verb_name, name, source, false);
+    }
+
+    pa_alsa_profile_dump(p);
+
+    return 0;
+}
+
+static void mapping_init_eld(pa_alsa_mapping *m, snd_pcm_t *pcm)
+{
+    pa_alsa_ucm_mapping_context *context = &m->ucm_context;
+    pa_alsa_ucm_device *dev;
+    uint32_t idx;
+    char *mdev, *alib_prefix;
+    snd_pcm_info_t *info;
+    int pcm_card, pcm_device;
+
+    snd_pcm_info_alloca(&info);
+    if (snd_pcm_info(pcm, info) < 0)
+        return;
+
+    if ((pcm_card = snd_pcm_info_get_card(info)) < 0)
+        return;
+    if ((pcm_device = snd_pcm_info_get_device(info)) < 0)
+        return;
+
+    alib_prefix = context->ucm->alib_prefix;
+
+    PA_IDXSET_FOREACH(dev, context->ucm_devices, idx) {
+       mdev = pa_sprintf_malloc("%shw:%i", alib_prefix ? alib_prefix : "", pcm_card);
+       if (mdev == NULL)
+           continue;
+       dev->eld_mixer_device_name = mdev;
+       dev->eld_device = pcm_device;
+    }
+}
+
+static snd_pcm_t* mapping_open_pcm(pa_alsa_ucm_config *ucm, pa_alsa_mapping *m, int mode) {
+    snd_pcm_t* pcm;
+    pa_sample_spec try_ss = ucm->default_sample_spec;
+    pa_channel_map try_map;
+    snd_pcm_uframes_t try_period_size, try_buffer_size;
+    bool exact_channels = m->channel_map.channels > 0;
+
+    if (exact_channels) {
+        try_map = m->channel_map;
+        try_ss.channels = try_map.channels;
+    } else
+        pa_channel_map_init_extend(&try_map, try_ss.channels, PA_CHANNEL_MAP_ALSA);
+
+    try_period_size =
+        pa_usec_to_bytes(ucm->default_fragment_size_msec * PA_USEC_PER_MSEC, &try_ss) /
+        pa_frame_size(&try_ss);
+    try_buffer_size = ucm->default_n_fragments * try_period_size;
+
+    pcm = pa_alsa_open_by_device_string(m->device_strings[0], NULL, &try_ss,
+            &try_map, mode, &try_period_size, &try_buffer_size, 0, NULL, NULL, exact_channels);
+
+    if (pcm) {
+        if (!exact_channels)
+            m->channel_map = try_map;
+        mapping_init_eld(m, pcm);
+    }
+
+    return pcm;
+}
+
+static void profile_finalize_probing(pa_alsa_profile *p) {
+    pa_alsa_mapping *m;
+    uint32_t idx;
+
+    PA_IDXSET_FOREACH(m, p->output_mappings, idx) {
+        if (p->supported)
+            m->supported++;
+
+        if (!m->output_pcm)
+            continue;
+
+        pa_alsa_init_proplist_pcm(NULL, m->output_proplist, m->output_pcm);
+        pa_alsa_close(&m->output_pcm);
+    }
+
+    PA_IDXSET_FOREACH(m, p->input_mappings, idx) {
+        if (p->supported)
+            m->supported++;
+
+        if (!m->input_pcm)
+            continue;
+
+        pa_alsa_init_proplist_pcm(NULL, m->input_proplist, m->input_pcm);
+        pa_alsa_close(&m->input_pcm);
+    }
+}
+
+static void ucm_mapping_jack_probe(pa_alsa_mapping *m, pa_hashmap *mixers) {
+    snd_mixer_t *mixer_handle;
+    pa_alsa_ucm_mapping_context *context = &m->ucm_context;
+    pa_alsa_ucm_device *dev;
+    uint32_t idx;
+
+    PA_IDXSET_FOREACH(dev, context->ucm_devices, idx) {
+        bool has_control;
+
+        if (!dev->jack || !dev->jack->mixer_device_name)
+            continue;
+
+        mixer_handle = pa_alsa_open_mixer_by_name(mixers, dev->jack->mixer_device_name, true);
+        if (!mixer_handle) {
+            pa_log_error("Unable to determine open mixer device '%s' for jack %s", dev->jack->mixer_device_name, dev->jack->name);
+            continue;
+        }
+
+        has_control = pa_alsa_mixer_find_card(mixer_handle, &dev->jack->alsa_id, 0) != NULL;
+        pa_alsa_jack_set_has_control(dev->jack, has_control);
+        pa_log_info("UCM jack %s has_control=%d", dev->jack->name, dev->jack->has_control);
+    }
+}
+
+static void ucm_probe_profile_set(pa_alsa_ucm_config *ucm, pa_alsa_profile_set *ps) {
+    void *state;
+    pa_alsa_profile *p;
+    pa_alsa_mapping *m;
+    uint32_t idx;
+
+    PA_HASHMAP_FOREACH(p, ps->profiles, state) {
+        /* change verb */
+        pa_log_info("Set ucm verb to %s", p->name);
+
+        if ((snd_use_case_set(ucm->ucm_mgr, "_verb", p->name)) < 0) {
+            pa_log("Failed to set verb %s", p->name);
+            p->supported = false;
+            continue;
+        }
+
+        PA_IDXSET_FOREACH(m, p->output_mappings, idx) {
+            if (PA_UCM_IS_MODIFIER_MAPPING(m)) {
+                /* Skip jack probing on modifier PCMs since we expect this to
+                 * only be controlled on the main device/verb PCM. */
+                continue;
+            }
+
+            m->output_pcm = mapping_open_pcm(ucm, m, SND_PCM_STREAM_PLAYBACK);
+            if (!m->output_pcm) {
+                p->supported = false;
+                break;
+            }
+        }
+
+        if (p->supported) {
+            PA_IDXSET_FOREACH(m, p->input_mappings, idx) {
+                if (PA_UCM_IS_MODIFIER_MAPPING(m)) {
+                    /* Skip jack probing on modifier PCMs since we expect this to
+                     * only be controlled on the main device/verb PCM. */
+                    continue;
+                }
+
+                m->input_pcm = mapping_open_pcm(ucm, m, SND_PCM_STREAM_CAPTURE);
+                if (!m->input_pcm) {
+                    p->supported = false;
+                    break;
+                }
+            }
+        }
+
+        if (!p->supported) {
+            profile_finalize_probing(p);
+            continue;
+        }
+
+        pa_log_debug("Profile %s supported.", p->name);
+
+        PA_IDXSET_FOREACH(m, p->output_mappings, idx)
+            if (!PA_UCM_IS_MODIFIER_MAPPING(m))
+                ucm_mapping_jack_probe(m, ucm->mixers);
+
+        PA_IDXSET_FOREACH(m, p->input_mappings, idx)
+            if (!PA_UCM_IS_MODIFIER_MAPPING(m))
+                ucm_mapping_jack_probe(m, ucm->mixers);
+
+        profile_finalize_probing(p);
+    }
+
+    /* restore ucm state */
+    snd_use_case_set(ucm->ucm_mgr, "_verb", SND_USE_CASE_VERB_INACTIVE);
+
+    pa_alsa_profile_set_drop_unsupported(ps);
+}
+
+pa_alsa_profile_set* pa_alsa_ucm_add_profile_set(pa_alsa_ucm_config *ucm, pa_channel_map *default_channel_map) {
+    pa_alsa_ucm_verb *verb;
+    pa_alsa_profile_set *ps;
+
+    ps = pa_xnew0(pa_alsa_profile_set, 1);
+    ps->mappings = pa_hashmap_new_full(pa_idxset_string_hash_func, pa_idxset_string_compare_func, NULL,
+                                       (pa_free_cb_t) pa_alsa_mapping_free);
+    ps->profiles = pa_hashmap_new_full(pa_idxset_string_hash_func, pa_idxset_string_compare_func, NULL,
+                                       (pa_free_cb_t) pa_alsa_profile_free);
+    ps->decibel_fixes = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
+
+    /* create a profile for each verb */
+    PA_LLIST_FOREACH(verb, ucm->verbs) {
+        const char *verb_name;
+        const char *verb_desc;
+
+        verb_name = pa_proplist_gets(verb->proplist, PA_ALSA_PROP_UCM_NAME);
+        verb_desc = pa_proplist_gets(verb->proplist, PA_ALSA_PROP_UCM_DESCRIPTION);
+        if (verb_name == NULL) {
+            pa_log("Verb with no name");
+            continue;
+        }
+
+        ucm_create_profile(ucm, ps, verb, verb_name, verb_desc);
+    }
+
+    ucm_probe_profile_set(ucm, ps);
+    ps->probed = true;
+
+    return ps;
+}
+
+static void free_verb(pa_alsa_ucm_verb *verb) {
+    pa_alsa_ucm_device *di, *dn;
+    pa_alsa_ucm_modifier *mi, *mn;
+
+    PA_LLIST_FOREACH_SAFE(di, dn, verb->devices) {
+        PA_LLIST_REMOVE(pa_alsa_ucm_device, verb->devices, di);
+
+        if (di->hw_mute_jacks)
+            pa_dynarray_free(di->hw_mute_jacks);
+
+        if (di->ucm_ports)
+            pa_dynarray_free(di->ucm_ports);
+
+        if (di->playback_volumes)
+            pa_hashmap_free(di->playback_volumes);
+        if (di->capture_volumes)
+            pa_hashmap_free(di->capture_volumes);
+
+        pa_proplist_free(di->proplist);
+
+        if (di->conflicting_devices)
+            pa_idxset_free(di->conflicting_devices, NULL);
+        if (di->supported_devices)
+            pa_idxset_free(di->supported_devices, NULL);
+
+        pa_xfree(di->eld_mixer_device_name);
+
+        pa_xfree(di);
+    }
+
+    PA_LLIST_FOREACH_SAFE(mi, mn, verb->modifiers) {
+        PA_LLIST_REMOVE(pa_alsa_ucm_modifier, verb->modifiers, mi);
+        pa_proplist_free(mi->proplist);
+        if (mi->n_suppdev > 0)
+            snd_use_case_free_list(mi->supported_devices, mi->n_suppdev);
+        if (mi->n_confdev > 0)
+            snd_use_case_free_list(mi->conflicting_devices, mi->n_confdev);
+        pa_xfree(mi->media_role);
+        pa_xfree(mi);
+    }
+    pa_proplist_free(verb->proplist);
+    pa_xfree(verb);
+}
+
+static pa_alsa_ucm_device *verb_find_device(pa_alsa_ucm_verb *verb, const char *device_name) {
+    pa_alsa_ucm_device *device;
+
+    pa_assert(verb);
+    pa_assert(device_name);
+
+    PA_LLIST_FOREACH(device, verb->devices) {
+        const char *name;
+
+        name = pa_proplist_gets(device->proplist, PA_ALSA_PROP_UCM_NAME);
+        if (pa_streq(name, device_name))
+            return device;
+    }
+
+    return NULL;
+}
+
+void pa_alsa_ucm_free(pa_alsa_ucm_config *ucm) {
+    pa_alsa_ucm_verb *vi, *vn;
+    pa_alsa_jack *ji, *jn;
+
+    PA_LLIST_FOREACH_SAFE(vi, vn, ucm->verbs) {
+        PA_LLIST_REMOVE(pa_alsa_ucm_verb, ucm->verbs, vi);
+        free_verb(vi);
+    }
+    PA_LLIST_FOREACH_SAFE(ji, jn, ucm->jacks) {
+        PA_LLIST_REMOVE(pa_alsa_jack, ucm->jacks, ji);
+        pa_alsa_jack_free(ji);
+    }
+    if (ucm->ucm_mgr) {
+        snd_use_case_mgr_close(ucm->ucm_mgr);
+        ucm->ucm_mgr = NULL;
+    }
+    pa_xfree(ucm->alib_prefix);
+    ucm->alib_prefix = NULL;
+}
+
+void pa_alsa_ucm_mapping_context_free(pa_alsa_ucm_mapping_context *context) {
+    pa_alsa_ucm_device *dev;
+    pa_alsa_ucm_modifier *mod;
+    uint32_t idx;
+
+    if (context->ucm_devices) {
+        /* clear ucm device pointer to mapping */
+        PA_IDXSET_FOREACH(dev, context->ucm_devices, idx) {
+            if (context->direction == PA_DIRECTION_OUTPUT)
+                dev->playback_mapping = NULL;
+            else
+                dev->capture_mapping = NULL;
+        }
+
+        pa_idxset_free(context->ucm_devices, NULL);
+    }
+
+    if (context->ucm_modifiers) {
+        PA_IDXSET_FOREACH(mod, context->ucm_modifiers, idx) {
+            if (context->direction == PA_DIRECTION_OUTPUT)
+                mod->playback_mapping = NULL;
+            else
+                mod->capture_mapping = NULL;
+        }
+
+        pa_idxset_free(context->ucm_modifiers, NULL);
+    }
+}
+
+/* Enable the modifier when the first stream with matched role starts */
+void pa_alsa_ucm_roled_stream_begin(pa_alsa_ucm_config *ucm, const char *role, pa_direction_t dir) {
+    pa_alsa_ucm_modifier *mod;
+
+    if (!ucm->active_verb)
+        return;
+
+    PA_LLIST_FOREACH(mod, ucm->active_verb->modifiers) {
+        if ((mod->action_direction == dir) && (pa_streq(mod->media_role, role))) {
+            if (mod->enabled_counter == 0) {
+                const char *mod_name = pa_proplist_gets(mod->proplist, PA_ALSA_PROP_UCM_NAME);
+
+                pa_log_info("Enable ucm modifier %s", mod_name);
+                if (snd_use_case_set(ucm->ucm_mgr, "_enamod", mod_name) < 0) {
+                    pa_log("Failed to enable ucm modifier %s", mod_name);
+                }
+            }
+
+            mod->enabled_counter++;
+            break;
+        }
+    }
+}
+
+/* Disable the modifier when the last stream with matched role ends */
+void pa_alsa_ucm_roled_stream_end(pa_alsa_ucm_config *ucm, const char *role, pa_direction_t dir) {
+    pa_alsa_ucm_modifier *mod;
+
+    if (!ucm->active_verb)
+        return;
+
+    PA_LLIST_FOREACH(mod, ucm->active_verb->modifiers) {
+        if ((mod->action_direction == dir) && (pa_streq(mod->media_role, role))) {
+
+            mod->enabled_counter--;
+            if (mod->enabled_counter == 0) {
+                const char *mod_name = pa_proplist_gets(mod->proplist, PA_ALSA_PROP_UCM_NAME);
+
+                pa_log_info("Disable ucm modifier %s", mod_name);
+                if (snd_use_case_set(ucm->ucm_mgr, "_dismod", mod_name) < 0) {
+                    pa_log("Failed to disable ucm modifier %s", mod_name);
+                }
+            }
+
+            break;
+        }
+    }
+}
+
+static void device_add_ucm_port(pa_alsa_ucm_device *device, pa_alsa_ucm_port_data *port) {
+    pa_assert(device);
+    pa_assert(port);
+
+    pa_dynarray_append(device->ucm_ports, port);
+}
+
+static void device_set_jack(pa_alsa_ucm_device *device, pa_alsa_jack *jack) {
+    pa_assert(device);
+    pa_assert(jack);
+
+    device->jack = jack;
+    pa_alsa_jack_add_ucm_device(jack, device);
+
+    pa_alsa_ucm_device_update_available(device);
+}
+
+static void device_add_hw_mute_jack(pa_alsa_ucm_device *device, pa_alsa_jack *jack) {
+    pa_assert(device);
+    pa_assert(jack);
+
+    pa_dynarray_append(device->hw_mute_jacks, jack);
+    pa_alsa_jack_add_ucm_hw_mute_device(jack, device);
+
+    pa_alsa_ucm_device_update_available(device);
+}
+
+static void device_set_available(pa_alsa_ucm_device *device, pa_available_t available) {
+    pa_alsa_ucm_port_data *port;
+    unsigned idx;
+
+    pa_assert(device);
+
+    if (available == device->available)
+        return;
+
+    device->available = available;
+
+    PA_DYNARRAY_FOREACH(port, device->ucm_ports, idx)
+        ucm_port_update_available(port);
+}
+
+void pa_alsa_ucm_device_update_available(pa_alsa_ucm_device *device) {
+    pa_available_t available = PA_AVAILABLE_UNKNOWN;
+    pa_alsa_jack *jack;
+    unsigned idx;
+
+    pa_assert(device);
+
+    if (device->jack && device->jack->has_control)
+        available = device->jack->plugged_in ? PA_AVAILABLE_YES : PA_AVAILABLE_NO;
+
+    PA_DYNARRAY_FOREACH(jack, device->hw_mute_jacks, idx) {
+        if (jack->plugged_in) {
+            available = PA_AVAILABLE_NO;
+            break;
+        }
+    }
+
+    device_set_available(device, available);
+}
+
+static void ucm_port_data_init(pa_alsa_ucm_port_data *port, pa_alsa_ucm_config *ucm, pa_device_port *core_port,
+                               pa_alsa_ucm_device **devices, unsigned n_devices) {
+    unsigned i;
+
+    pa_assert(ucm);
+    pa_assert(core_port);
+    pa_assert(devices);
+
+    port->ucm = ucm;
+    port->core_port = core_port;
+    port->devices = pa_dynarray_new(NULL);
+    port->eld_device = -1;
+
+    for (i = 0; i < n_devices; i++) {
+        pa_dynarray_append(port->devices, devices[i]);
+        device_add_ucm_port(devices[i], port);
+    }
+
+    port->paths = pa_hashmap_new_full(pa_idxset_string_hash_func, pa_idxset_string_compare_func, pa_xfree, NULL);
+
+    ucm_port_update_available(port);
+}
+
+static void ucm_port_data_free(pa_device_port *port) {
+    pa_alsa_ucm_port_data *ucm_port;
+
+    pa_assert(port);
+
+    ucm_port = PA_DEVICE_PORT_DATA(port);
+
+    if (ucm_port->devices)
+        pa_dynarray_free(ucm_port->devices);
+
+    if (ucm_port->paths)
+        pa_hashmap_free(ucm_port->paths);
+
+    pa_xfree(ucm_port->eld_mixer_device_name);
+}
+
+static void ucm_port_update_available(pa_alsa_ucm_port_data *port) {
+    pa_alsa_ucm_device *device;
+    unsigned idx;
+    pa_available_t available = PA_AVAILABLE_YES;
+
+    pa_assert(port);
+
+    PA_DYNARRAY_FOREACH(device, port->devices, idx) {
+        if (device->available == PA_AVAILABLE_UNKNOWN)
+            available = PA_AVAILABLE_UNKNOWN;
+        else if (device->available == PA_AVAILABLE_NO) {
+            available = PA_AVAILABLE_NO;
+            break;
+        }
+    }
+
+    pa_device_port_set_available(port->core_port, available);
+}
+
+#else /* HAVE_ALSA_UCM */
+
+/* Dummy functions for systems without UCM support */
+
+int pa_alsa_ucm_query_profiles(pa_alsa_ucm_config *ucm, int card_index) {
+        pa_log_info("UCM not available.");
+        return -1;
+}
+
+pa_alsa_profile_set* pa_alsa_ucm_add_profile_set(pa_alsa_ucm_config *ucm, pa_channel_map *default_channel_map) {
+    return NULL;
+}
+
+int pa_alsa_ucm_set_profile(pa_alsa_ucm_config *ucm, pa_card *card, const char *new_profile, const char *old_profile) {
+    return -1;
+}
+
+int pa_alsa_ucm_get_verb(snd_use_case_mgr_t *uc_mgr, const char *verb_name, const char *verb_desc, pa_alsa_ucm_verb **p_verb) {
+    return -1;
+}
+
+void pa_alsa_ucm_add_ports(
+        pa_hashmap **hash,
+        pa_proplist *proplist,
+        pa_alsa_ucm_mapping_context *context,
+        bool is_sink,
+        pa_card *card,
+        snd_pcm_t *pcm_handle,
+        bool ignore_dB) {
+}
+
+void pa_alsa_ucm_add_ports_combination(
+        pa_hashmap *hash,
+        pa_alsa_ucm_mapping_context *context,
+        bool is_sink,
+        pa_hashmap *ports,
+        pa_card_profile *cp,
+        pa_core *core) {
+}
+
+int pa_alsa_ucm_set_port(pa_alsa_ucm_mapping_context *context, pa_device_port *port, bool is_sink) {
+    return -1;
+}
+
+void pa_alsa_ucm_free(pa_alsa_ucm_config *ucm) {
+}
+
+void pa_alsa_ucm_mapping_context_free(pa_alsa_ucm_mapping_context *context) {
+}
+
+void pa_alsa_ucm_roled_stream_begin(pa_alsa_ucm_config *ucm, const char *role, pa_direction_t dir) {
+}
+
+void pa_alsa_ucm_roled_stream_end(pa_alsa_ucm_config *ucm, const char *role, pa_direction_t dir) {
+}
+
+#endif
diff --git a/spa/plugins/alsa/acp/alsa-ucm.h b/spa/plugins/alsa/acp/alsa-ucm.h
new file mode 100644
index 0000000..696209e
--- /dev/null
+++ b/spa/plugins/alsa/acp/alsa-ucm.h
@@ -0,0 +1,301 @@
+#ifndef fooalsaucmhfoo
+#define fooalsaucmhfoo
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2011 Wolfson Microelectronics PLC
+  Author Margarita Olaya <magi@slimlogic.co.uk>
+  Copyright 2012 Feng Wei <wei.feng@freescale.com>, Freescale Ltd.
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_ALSA_UCM
+#include <alsa/use-case.h>
+#else
+typedef void snd_use_case_mgr_t;
+#endif
+
+#include "compat.h"
+
+#include "alsa-mixer.h"
+
+/** For devices: List of verbs, devices or modifiers available */
+#define PA_ALSA_PROP_UCM_NAME                       "alsa.ucm.name"
+
+/** For devices: List of supported devices per verb*/
+#define PA_ALSA_PROP_UCM_DESCRIPTION                "alsa.ucm.description"
+
+/** For devices: Playback device name e.g PlaybackPCM */
+#define PA_ALSA_PROP_UCM_SINK                       "alsa.ucm.sink"
+
+/** For devices: Capture device name e.g CapturePCM*/
+#define PA_ALSA_PROP_UCM_SOURCE                     "alsa.ucm.source"
+
+/** For devices: Playback roles */
+#define PA_ALSA_PROP_UCM_PLAYBACK_ROLES             "alsa.ucm.playback.roles"
+
+/** For devices: Playback control device name  */
+#define PA_ALSA_PROP_UCM_PLAYBACK_CTL_DEVICE        "alsa.ucm.playback.ctldev"
+
+/** For devices: Playback control volume ID string. e.g PlaybackVolume */
+#define PA_ALSA_PROP_UCM_PLAYBACK_VOLUME            "alsa.ucm.playback.volume"
+
+/** For devices: Playback switch e.g PlaybackSwitch */
+#define PA_ALSA_PROP_UCM_PLAYBACK_SWITCH            "alsa.ucm.playback.switch"
+
+/** For devices: Playback mixer device name  */
+#define PA_ALSA_PROP_UCM_PLAYBACK_MIXER_DEVICE      "alsa.ucm.playback.mixer.device"
+
+/** For devices: Playback mixer identifier */
+#define PA_ALSA_PROP_UCM_PLAYBACK_MIXER_ELEM        "alsa.ucm.playback.mixer.element"
+
+/** For devices: Playback mixer master identifier */
+#define PA_ALSA_PROP_UCM_PLAYBACK_MASTER_ELEM       "alsa.ucm.playback.master.element"
+
+/** For devices: Playback mixer master type */
+#define PA_ALSA_PROP_UCM_PLAYBACK_MASTER_TYPE       "alsa.ucm.playback.master.type"
+
+/** For devices: Playback mixer master identifier */
+#define PA_ALSA_PROP_UCM_PLAYBACK_MASTER_ID         "alsa.ucm.playback.master.id"
+
+/** For devices: Playback mixer master type */
+#define PA_ALSA_PROP_UCM_PLAYBACK_MASTER_TYPE       "alsa.ucm.playback.master.type"
+
+/** For devices: Playback priority */
+#define PA_ALSA_PROP_UCM_PLAYBACK_PRIORITY          "alsa.ucm.playback.priority"
+
+/** For devices: Playback rate */
+#define PA_ALSA_PROP_UCM_PLAYBACK_RATE              "alsa.ucm.playback.rate"
+
+/** For devices: Playback channels */
+#define PA_ALSA_PROP_UCM_PLAYBACK_CHANNELS          "alsa.ucm.playback.channels"
+
+/** For devices: Capture roles */
+#define PA_ALSA_PROP_UCM_CAPTURE_ROLES              "alsa.ucm.capture.roles"
+
+/** For devices: Capture control device name  */
+#define PA_ALSA_PROP_UCM_CAPTURE_CTL_DEVICE         "alsa.ucm.capture.ctldev"
+
+/** For devices: Capture controls volume ID string. e.g CaptureVolume */
+#define PA_ALSA_PROP_UCM_CAPTURE_VOLUME             "alsa.ucm.capture.volume"
+
+/** For devices: Capture switch e.g CaptureSwitch */
+#define PA_ALSA_PROP_UCM_CAPTURE_SWITCH             "alsa.ucm.capture.switch"
+
+/** For devices: Capture mixer device name  */
+#define PA_ALSA_PROP_UCM_CAPTURE_MIXER_DEVICE       "alsa.ucm.capture.mixer.device"
+
+/** For devices: Capture mixer identifier */
+#define PA_ALSA_PROP_UCM_CAPTURE_MIXER_ELEM         "alsa.ucm.capture.mixer.element"
+
+/** For devices: Capture mixer identifier */
+#define PA_ALSA_PROP_UCM_CAPTURE_MASTER_ELEM        "alsa.ucm.capture.master.element"
+
+/** For devices: Capture mixer identifier */
+#define PA_ALSA_PROP_UCM_CAPTURE_MASTER_TYPE        "alsa.ucm.capture.master.type"
+
+/** For devices: Capture mixer identifier */
+#define PA_ALSA_PROP_UCM_CAPTURE_MASTER_ID          "alsa.ucm.capture.master.id"
+
+/** For devices: Capture mixer identifier */
+#define PA_ALSA_PROP_UCM_CAPTURE_MASTER_TYPE        "alsa.ucm.capture.master.type"
+
+/** For devices: Capture priority */
+#define PA_ALSA_PROP_UCM_CAPTURE_PRIORITY           "alsa.ucm.capture.priority"
+
+/** For devices: Capture rate */
+#define PA_ALSA_PROP_UCM_CAPTURE_RATE               "alsa.ucm.capture.rate"
+
+/** For devices: Capture channels */
+#define PA_ALSA_PROP_UCM_CAPTURE_CHANNELS           "alsa.ucm.capture.channels"
+
+/** For devices: Quality of Service */
+#define PA_ALSA_PROP_UCM_QOS                        "alsa.ucm.qos"
+
+/** For devices: The modifier (if any) that this device corresponds to */
+#define PA_ALSA_PROP_UCM_MODIFIER "alsa.ucm.modifier"
+
+/* Corresponds to the "JackCTL" UCM value. */
+#define PA_ALSA_PROP_UCM_JACK_DEVICE		    "alsa.ucm.jack_device"
+
+/* Corresponds to the "JackControl" UCM value. */
+#define PA_ALSA_PROP_UCM_JACK_CONTROL               "alsa.ucm.jack_control"
+
+/* Corresponds to the "JackHWMute" UCM value. */
+#define PA_ALSA_PROP_UCM_JACK_HW_MUTE               "alsa.ucm.jack_hw_mute"
+
+typedef struct pa_alsa_ucm_verb pa_alsa_ucm_verb;
+typedef struct pa_alsa_ucm_modifier pa_alsa_ucm_modifier;
+typedef struct pa_alsa_ucm_device pa_alsa_ucm_device;
+typedef struct pa_alsa_ucm_config pa_alsa_ucm_config;
+typedef struct pa_alsa_ucm_mapping_context pa_alsa_ucm_mapping_context;
+typedef struct pa_alsa_ucm_port_data pa_alsa_ucm_port_data;
+typedef struct pa_alsa_ucm_volume pa_alsa_ucm_volume;
+
+int pa_alsa_ucm_query_profiles(pa_alsa_ucm_config *ucm, int card_index);
+pa_alsa_profile_set* pa_alsa_ucm_add_profile_set(pa_alsa_ucm_config *ucm, pa_channel_map *default_channel_map);
+int pa_alsa_ucm_set_profile(pa_alsa_ucm_config *ucm, pa_card *card, const char *new_profile, const char *old_profile);
+
+int pa_alsa_ucm_get_verb(snd_use_case_mgr_t *uc_mgr, const char *verb_name, const char *verb_desc, pa_alsa_ucm_verb **p_verb);
+
+void pa_alsa_ucm_add_ports(
+        pa_hashmap **hash,
+        pa_proplist *proplist,
+        pa_alsa_ucm_mapping_context *context,
+        bool is_sink,
+        pa_card *card,
+        snd_pcm_t *pcm_handle,
+        bool ignore_dB);
+void pa_alsa_ucm_add_ports_combination(
+        pa_hashmap *hash,
+        pa_alsa_ucm_mapping_context *context,
+        bool is_sink,
+        pa_hashmap *ports,
+        pa_card_profile *cp,
+        pa_core *core);
+int pa_alsa_ucm_set_port(pa_alsa_ucm_mapping_context *context, pa_device_port *port, bool is_sink);
+
+void pa_alsa_ucm_free(pa_alsa_ucm_config *ucm);
+void pa_alsa_ucm_mapping_context_free(pa_alsa_ucm_mapping_context *context);
+
+void pa_alsa_ucm_roled_stream_begin(pa_alsa_ucm_config *ucm, const char *role, pa_direction_t dir);
+void pa_alsa_ucm_roled_stream_end(pa_alsa_ucm_config *ucm, const char *role, pa_direction_t dir);
+
+/* UCM - Use Case Manager is available on some audio cards */
+
+struct pa_alsa_ucm_device {
+    PA_LLIST_FIELDS(pa_alsa_ucm_device);
+
+    pa_proplist *proplist;
+
+    pa_device_port_type_t type;
+
+    unsigned playback_priority;
+    unsigned capture_priority;
+
+    unsigned playback_rate;
+    unsigned capture_rate;
+
+    unsigned playback_channels;
+    unsigned capture_channels;
+
+    /* These may be different per verb, so we store this as a hashmap of verb -> volume_control. We might eventually want to
+     * make this a hashmap of verb -> per-verb-device-properties-struct. */
+    pa_hashmap *playback_volumes;
+    pa_hashmap *capture_volumes;
+
+    pa_alsa_mapping *playback_mapping;
+    pa_alsa_mapping *capture_mapping;
+
+    pa_idxset *conflicting_devices;
+    pa_idxset *supported_devices;
+
+    /* One device may be part of multiple ports, since each device has
+     * a dedicated port, and in addition to that we sometimes generate ports
+     * that represent combinations of devices. */
+    pa_dynarray *ucm_ports; /* struct ucm_port */
+
+    pa_alsa_jack *jack;
+    pa_dynarray *hw_mute_jacks; /* pa_alsa_jack */
+    pa_available_t available;
+
+    char *eld_mixer_device_name;
+    int eld_device;
+};
+
+void pa_alsa_ucm_device_update_available(pa_alsa_ucm_device *device);
+
+struct pa_alsa_ucm_modifier {
+    PA_LLIST_FIELDS(pa_alsa_ucm_modifier);
+
+    pa_proplist *proplist;
+
+    int n_confdev;
+    int n_suppdev;
+
+    const char **conflicting_devices;
+    const char **supported_devices;
+
+    pa_direction_t action_direction;
+
+    char *media_role;
+
+    /* Non-NULL if the modifier has its own PlaybackPCM/CapturePCM */
+    pa_alsa_mapping *playback_mapping;
+    pa_alsa_mapping *capture_mapping;
+
+    /* Count how many role matched streams are running */
+    int enabled_counter;
+};
+
+struct pa_alsa_ucm_verb {
+    PA_LLIST_FIELDS(pa_alsa_ucm_verb);
+
+    pa_proplist *proplist;
+    unsigned priority;
+
+    PA_LLIST_HEAD(pa_alsa_ucm_device, devices);
+    PA_LLIST_HEAD(pa_alsa_ucm_modifier, modifiers);
+};
+
+struct pa_alsa_ucm_config {
+    pa_sample_spec default_sample_spec;
+    pa_channel_map default_channel_map;
+    unsigned default_fragment_size_msec;
+    unsigned default_n_fragments;
+
+    snd_use_case_mgr_t *ucm_mgr;
+    pa_alsa_ucm_verb *active_verb;
+    char *alib_prefix;
+
+    pa_hashmap *mixers;
+    PA_LLIST_HEAD(pa_alsa_ucm_verb, verbs);
+    PA_LLIST_HEAD(pa_alsa_jack, jacks);
+};
+
+struct pa_alsa_ucm_mapping_context {
+    pa_alsa_ucm_config *ucm;
+    pa_direction_t direction;
+
+    pa_idxset *ucm_devices;
+    pa_idxset *ucm_modifiers;
+};
+
+struct pa_alsa_ucm_port_data {
+    pa_alsa_ucm_config *ucm;
+    pa_device_port *core_port;
+
+    /* A single port will be associated with multiple devices if it represents
+     * a combination of devices. */
+    pa_dynarray *devices; /* pa_alsa_ucm_device */
+
+    /* profile name -> pa_alsa_path for volume control */
+    pa_hashmap *paths;
+    /* Current path, set when activating profile */
+    pa_alsa_path *path;
+
+    /* ELD info */
+    char *eld_mixer_device_name;
+    int eld_device; /* PCM device number */
+};
+
+struct pa_alsa_ucm_volume {
+    char *mixer_elem;	/* mixer element identifier */
+    char *master_elem;	/* master mixer element identifier */
+    char *master_type;
+};
+
+#endif
diff --git a/spa/plugins/alsa/acp/alsa-util.c b/spa/plugins/alsa/acp/alsa-util.c
new file mode 100644
index 0000000..c76cef3
--- /dev/null
+++ b/spa/plugins/alsa/acp/alsa-util.c
@@ -0,0 +1,1904 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2009 Lennart Poettering
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "config.h"
+
+#include <sys/types.h>
+#include <alsa/asoundlib.h>
+
+#include "alsa-util.h"
+#include "alsa-mixer.h"
+
+#ifdef HAVE_UDEV
+#include <modules/udev-util.h>
+#endif
+
+static int set_format(snd_pcm_t *pcm_handle, snd_pcm_hw_params_t *hwparams, pa_sample_format_t *f) {
+
+    static const snd_pcm_format_t format_trans[] = {
+        [PA_SAMPLE_U8] = SND_PCM_FORMAT_U8,
+        [PA_SAMPLE_ALAW] = SND_PCM_FORMAT_A_LAW,
+        [PA_SAMPLE_ULAW] = SND_PCM_FORMAT_MU_LAW,
+        [PA_SAMPLE_S16LE] = SND_PCM_FORMAT_S16_LE,
+        [PA_SAMPLE_S16BE] = SND_PCM_FORMAT_S16_BE,
+        [PA_SAMPLE_FLOAT32LE] = SND_PCM_FORMAT_FLOAT_LE,
+        [PA_SAMPLE_FLOAT32BE] = SND_PCM_FORMAT_FLOAT_BE,
+        [PA_SAMPLE_S32LE] = SND_PCM_FORMAT_S32_LE,
+        [PA_SAMPLE_S32BE] = SND_PCM_FORMAT_S32_BE,
+        [PA_SAMPLE_S24LE] = SND_PCM_FORMAT_S24_3LE,
+        [PA_SAMPLE_S24BE] = SND_PCM_FORMAT_S24_3BE,
+        [PA_SAMPLE_S24_32LE] = SND_PCM_FORMAT_S24_LE,
+        [PA_SAMPLE_S24_32BE] = SND_PCM_FORMAT_S24_BE,
+    };
+
+    static const pa_sample_format_t try_order[] = {
+        PA_SAMPLE_FLOAT32NE,
+        PA_SAMPLE_FLOAT32RE,
+        PA_SAMPLE_S32NE,
+        PA_SAMPLE_S32RE,
+        PA_SAMPLE_S24_32NE,
+        PA_SAMPLE_S24_32RE,
+        PA_SAMPLE_S24NE,
+        PA_SAMPLE_S24RE,
+        PA_SAMPLE_S16NE,
+        PA_SAMPLE_S16RE,
+        PA_SAMPLE_ALAW,
+        PA_SAMPLE_ULAW,
+        PA_SAMPLE_U8
+    };
+
+    unsigned i;
+    int ret;
+
+    pa_assert(pcm_handle);
+    pa_assert(hwparams);
+    pa_assert(f);
+
+    if ((ret = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format_trans[*f])) >= 0)
+        return ret;
+
+    pa_log_debug("snd_pcm_hw_params_set_format(%s) failed: %s",
+                 snd_pcm_format_description(format_trans[*f]),
+                 pa_alsa_strerror(ret));
+
+    if (*f == PA_SAMPLE_FLOAT32BE)
+        *f = PA_SAMPLE_FLOAT32LE;
+    else if (*f == PA_SAMPLE_FLOAT32LE)
+        *f = PA_SAMPLE_FLOAT32BE;
+    else if (*f == PA_SAMPLE_S24BE)
+        *f = PA_SAMPLE_S24LE;
+    else if (*f == PA_SAMPLE_S24LE)
+        *f = PA_SAMPLE_S24BE;
+    else if (*f == PA_SAMPLE_S24_32BE)
+        *f = PA_SAMPLE_S24_32LE;
+    else if (*f == PA_SAMPLE_S24_32LE)
+        *f = PA_SAMPLE_S24_32BE;
+    else if (*f == PA_SAMPLE_S16BE)
+        *f = PA_SAMPLE_S16LE;
+    else if (*f == PA_SAMPLE_S16LE)
+        *f = PA_SAMPLE_S16BE;
+    else if (*f == PA_SAMPLE_S32BE)
+        *f = PA_SAMPLE_S32LE;
+    else if (*f == PA_SAMPLE_S32LE)
+        *f = PA_SAMPLE_S32BE;
+    else
+        goto try_auto;
+
+    if ((ret = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format_trans[*f])) >= 0)
+        return ret;
+
+    pa_log_debug("snd_pcm_hw_params_set_format(%s) failed: %s",
+                 snd_pcm_format_description(format_trans[*f]),
+                 pa_alsa_strerror(ret));
+
+try_auto:
+
+    for (i = 0; i < PA_ELEMENTSOF(try_order); i++) {
+        *f = try_order[i];
+
+        if ((ret = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format_trans[*f])) >= 0)
+            return ret;
+
+        pa_log_debug("snd_pcm_hw_params_set_format(%s) failed: %s",
+                     snd_pcm_format_description(format_trans[*f]),
+                     pa_alsa_strerror(ret));
+    }
+
+    return -1;
+}
+
+static int set_period_size(snd_pcm_t *pcm_handle, snd_pcm_hw_params_t *hwparams, snd_pcm_uframes_t size) {
+    snd_pcm_uframes_t s;
+    int d, ret;
+
+    pa_assert(pcm_handle);
+    pa_assert(hwparams);
+
+    s = size;
+    d = 0;
+    if (snd_pcm_hw_params_set_period_size_near(pcm_handle, hwparams, &s, &d) < 0) {
+        s = size;
+        d = -1;
+        if (snd_pcm_hw_params_set_period_size_near(pcm_handle, hwparams, &s, &d) < 0) {
+            s = size;
+            d = 1;
+            if ((ret = snd_pcm_hw_params_set_period_size_near(pcm_handle, hwparams, &s, &d)) < 0) {
+                pa_log_info("snd_pcm_hw_params_set_period_size_near() failed: %s", pa_alsa_strerror(ret));
+                return ret;
+            }
+        }
+    }
+
+    return 0;
+}
+
+static int set_buffer_size(snd_pcm_t *pcm_handle, snd_pcm_hw_params_t *hwparams, snd_pcm_uframes_t size) {
+    int ret;
+
+    pa_assert(pcm_handle);
+    pa_assert(hwparams);
+
+    if ((ret = snd_pcm_hw_params_set_buffer_size_near(pcm_handle, hwparams, &size)) < 0) {
+        pa_log_info("snd_pcm_hw_params_set_buffer_size_near() failed: %s", pa_alsa_strerror(ret));
+        return ret;
+    }
+
+    return 0;
+}
+
+static void check_access(snd_pcm_t *pcm_handle, snd_pcm_hw_params_t *hwparams, bool use_mmap) {
+    if ((use_mmap && !snd_pcm_hw_params_test_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_INTERLEAVED)) ||
+        !snd_pcm_hw_params_test_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED))
+        pa_log_error("Weird, PCM claims to support interleaved access, but snd_pcm_hw_params_set_access() failed.");
+
+    if ((use_mmap && !snd_pcm_hw_params_test_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_NONINTERLEAVED)) ||
+        !snd_pcm_hw_params_test_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_NONINTERLEAVED))
+        pa_log_debug("PCM seems to support non-interleaved access, but PA doesn't.");
+    else if (use_mmap && !snd_pcm_hw_params_test_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_COMPLEX)) {
+        pa_log_debug("PCM seems to support mmapped complex access, but PA doesn't.");
+    }
+}
+
+/* Set the hardware parameters of the given ALSA device. Returns the
+ * selected fragment settings in *buffer_size and *period_size. Determine
+ * whether mmap and tsched mode can be enabled. */
+int pa_alsa_set_hw_params(
+        snd_pcm_t *pcm_handle,
+        pa_sample_spec *ss,
+        snd_pcm_uframes_t *period_size,
+        snd_pcm_uframes_t *buffer_size,
+        snd_pcm_uframes_t tsched_size,
+        bool *use_mmap,
+        bool *use_tsched,
+        bool require_exact_channel_number) {
+
+    int ret = -1;
+    snd_pcm_hw_params_t *hwparams, *hwparams_copy;
+    int dir;
+    snd_pcm_uframes_t _period_size = period_size ? *period_size : 0;
+    snd_pcm_uframes_t _buffer_size = buffer_size ? *buffer_size : 0;
+    bool _use_mmap = use_mmap && *use_mmap;
+    bool _use_tsched = use_tsched && *use_tsched;
+    pa_sample_spec _ss = *ss;
+
+    pa_assert(pcm_handle);
+    pa_assert(ss);
+
+    snd_pcm_hw_params_alloca(&hwparams);
+    snd_pcm_hw_params_alloca(&hwparams_copy);
+
+    if ((ret = snd_pcm_hw_params_any(pcm_handle, hwparams)) < 0) {
+        pa_log_debug("snd_pcm_hw_params_any() failed: %s", pa_alsa_strerror(ret));
+        goto finish;
+    }
+
+    if ((ret = snd_pcm_hw_params_set_rate_resample(pcm_handle, hwparams, 0)) < 0) {
+        pa_log_debug("snd_pcm_hw_params_set_rate_resample() failed: %s", pa_alsa_strerror(ret));
+        goto finish;
+    }
+
+    if (_use_mmap) {
+
+        if (snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_INTERLEAVED) < 0) {
+
+            /* mmap() didn't work, fall back to interleaved */
+
+            if ((ret = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
+                pa_log_debug("snd_pcm_hw_params_set_access() failed: %s", pa_alsa_strerror(ret));
+                check_access(pcm_handle, hwparams, true);
+                goto finish;
+            }
+
+            _use_mmap = false;
+        }
+
+    } else if ((ret = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
+        pa_log_debug("snd_pcm_hw_params_set_access() failed: %s", pa_alsa_strerror(ret));
+        check_access(pcm_handle, hwparams, false);
+        goto finish;
+    }
+
+    if (!_use_mmap)
+        _use_tsched = false;
+
+    if (!pa_alsa_pcm_is_hw(pcm_handle))
+        _use_tsched = false;
+
+    /* The PCM pointer is only updated with period granularity */
+    if (snd_pcm_hw_params_is_batch(hwparams)) {
+        bool is_usb = false;
+        const char *id;
+        snd_pcm_info_t* pcm_info;
+        snd_pcm_info_alloca(&pcm_info);
+
+        if (snd_pcm_info(pcm_handle, pcm_info) == 0 &&
+            (id = snd_pcm_info_get_id(pcm_info))) {
+            /* This horrible hack makes sure we don't disable tsched on USB
+             * devices, which have a low enough transfer size for timer-based
+             * scheduling to work. This can go away when the ALSA API supports
+             * querying the block transfer size. */
+            if (pa_streq(id, "USB Audio"))
+                is_usb = true;
+        }
+
+        if (!is_usb) {
+            pa_log_info("Disabling tsched mode since BATCH flag is set");
+            _use_tsched = false;
+        }
+    }
+
+#if (SND_LIB_VERSION >= ((1<<16)|(0<<8)|24)) /* API additions in 1.0.24 */
+    if (_use_tsched) {
+
+        /* try to disable period wakeups if hardware can do so */
+        if (snd_pcm_hw_params_can_disable_period_wakeup(hwparams)) {
+
+            if ((ret = snd_pcm_hw_params_set_period_wakeup(pcm_handle, hwparams, false)) < 0)
+                /* don't bail, keep going with default mode with period wakeups */
+                pa_log_debug("snd_pcm_hw_params_set_period_wakeup() failed: %s", pa_alsa_strerror(ret));
+            else
+                pa_log_info("Trying to disable ALSA period wakeups, using timers only");
+        } else
+            pa_log_info("Cannot disable ALSA period wakeups");
+    }
+#endif
+
+    if ((ret = set_format(pcm_handle, hwparams, &_ss.format)) < 0)
+        goto finish;
+
+    if ((ret = snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, &_ss.rate, NULL)) < 0) {
+        pa_log_debug("snd_pcm_hw_params_set_rate_near() failed: %s", pa_alsa_strerror(ret));
+        goto finish;
+    }
+
+    /* We ignore very small sampling rate deviations */
+    if (_ss.rate >= ss->rate*.95 && _ss.rate <= ss->rate*1.05)
+        _ss.rate = ss->rate;
+
+    if (require_exact_channel_number) {
+        if ((ret = snd_pcm_hw_params_set_channels(pcm_handle, hwparams, _ss.channels)) < 0) {
+            pa_log_debug("snd_pcm_hw_params_set_channels(%u) failed: %s", _ss.channels, pa_alsa_strerror(ret));
+            goto finish;
+        }
+    } else {
+        unsigned int c = _ss.channels;
+
+        if ((ret = snd_pcm_hw_params_set_channels_near(pcm_handle, hwparams, &c)) < 0) {
+            pa_log_debug("snd_pcm_hw_params_set_channels_near(%u) failed: %s", _ss.channels, pa_alsa_strerror(ret));
+            goto finish;
+        }
+
+        _ss.channels = c;
+    }
+
+    if (_use_tsched && tsched_size > 0) {
+        _buffer_size = (snd_pcm_uframes_t) (((uint64_t) tsched_size * _ss.rate) / ss->rate);
+        _period_size = _buffer_size;
+    } else {
+        _period_size = (snd_pcm_uframes_t) (((uint64_t) _period_size * _ss.rate) / ss->rate);
+        _buffer_size = (snd_pcm_uframes_t) (((uint64_t) _buffer_size * _ss.rate) / ss->rate);
+    }
+
+    if (_buffer_size > 0 || _period_size > 0) {
+        snd_pcm_uframes_t max_frames = 0;
+
+        if ((ret = snd_pcm_hw_params_get_buffer_size_max(hwparams, &max_frames)) < 0)
+            pa_log_warn("snd_pcm_hw_params_get_buffer_size_max() failed: %s", pa_alsa_strerror(ret));
+        else
+            pa_log_debug("Maximum hw buffer size is %lu ms", (long unsigned) (max_frames * PA_MSEC_PER_SEC / _ss.rate));
+
+        /* Some ALSA drivers really don't like if we set the buffer
+         * size first and the number of periods second (which would
+         * make a lot more sense to me). So, try a few combinations
+         * before we give up. */
+
+        if (_buffer_size > 0 && _period_size > 0) {
+            snd_pcm_hw_params_copy(hwparams_copy, hwparams);
+
+            /* First try: set buffer size first, followed by period size */
+            if (set_buffer_size(pcm_handle, hwparams_copy, _buffer_size) >= 0 &&
+                set_period_size(pcm_handle, hwparams_copy, _period_size) >= 0 &&
+                snd_pcm_hw_params(pcm_handle, hwparams_copy) >= 0) {
+                pa_log_debug("Set buffer size first (to %lu samples), period size second (to %lu samples).", (unsigned long) _buffer_size, (unsigned long) _period_size);
+                goto success;
+            }
+
+            snd_pcm_hw_params_copy(hwparams_copy, hwparams);
+            /* Second try: set period size first, followed by buffer size */
+            if (set_period_size(pcm_handle, hwparams_copy, _period_size) >= 0 &&
+                set_buffer_size(pcm_handle, hwparams_copy, _buffer_size) >= 0 &&
+                snd_pcm_hw_params(pcm_handle, hwparams_copy) >= 0) {
+                pa_log_debug("Set period size first (to %lu samples), buffer size second (to %lu samples).", (unsigned long) _period_size, (unsigned long) _buffer_size);
+                goto success;
+            }
+        }
+
+        if (_buffer_size > 0) {
+            snd_pcm_hw_params_copy(hwparams_copy, hwparams);
+
+            /* Third try: set only buffer size */
+            if (set_buffer_size(pcm_handle, hwparams_copy, _buffer_size) >= 0 &&
+                snd_pcm_hw_params(pcm_handle, hwparams_copy) >= 0) {
+                pa_log_debug("Set only buffer size (to %lu samples).", (unsigned long) _buffer_size);
+                goto success;
+            }
+        }
+
+        if (_period_size > 0) {
+            snd_pcm_hw_params_copy(hwparams_copy, hwparams);
+
+            /* Fourth try: set only period size */
+            if (set_period_size(pcm_handle, hwparams_copy, _period_size) >= 0 &&
+                snd_pcm_hw_params(pcm_handle, hwparams_copy) >= 0) {
+                pa_log_debug("Set only period size (to %lu samples).", (unsigned long) _period_size);
+                goto success;
+            }
+        }
+    }
+
+    pa_log_debug("Set neither period nor buffer size.");
+
+    /* Last chance, set nothing */
+    if ((ret = snd_pcm_hw_params(pcm_handle, hwparams)) < 0) {
+        pa_log_info("snd_pcm_hw_params failed: %s", pa_alsa_strerror(ret));
+        goto finish;
+    }
+
+success:
+
+    if (ss->rate != _ss.rate)
+        pa_log_info("Device %s doesn't support %u Hz, changed to %u Hz.", snd_pcm_name(pcm_handle), ss->rate, _ss.rate);
+
+    if (ss->channels != _ss.channels)
+        pa_log_info("Device %s doesn't support %u channels, changed to %u.", snd_pcm_name(pcm_handle), ss->channels, _ss.channels);
+
+    if (ss->format != _ss.format)
+        pa_log_info("Device %s doesn't support sample format %s, changed to %s.", snd_pcm_name(pcm_handle), pa_sample_format_to_string(ss->format), pa_sample_format_to_string(_ss.format));
+
+    if ((ret = snd_pcm_hw_params_current(pcm_handle, hwparams)) < 0) {
+        pa_log_info("snd_pcm_hw_params_current() failed: %s", pa_alsa_strerror(ret));
+        goto finish;
+    }
+
+    if ((ret = snd_pcm_hw_params_get_period_size(hwparams, &_period_size, &dir)) < 0 ||
+        (ret = snd_pcm_hw_params_get_buffer_size(hwparams, &_buffer_size)) < 0) {
+        pa_log_info("snd_pcm_hw_params_get_{period|buffer}_size() failed: %s", pa_alsa_strerror(ret));
+        goto finish;
+    }
+
+#if (SND_LIB_VERSION >= ((1<<16)|(0<<8)|24)) /* API additions in 1.0.24 */
+    if (_use_tsched) {
+        unsigned int no_wakeup;
+        /* see if period wakeups were disabled */
+        snd_pcm_hw_params_get_period_wakeup(pcm_handle, hwparams, &no_wakeup);
+        if (no_wakeup == 0)
+            pa_log_info("ALSA period wakeups disabled");
+        else
+            pa_log_info("ALSA period wakeups were not disabled");
+    }
+#endif
+
+    ss->rate = _ss.rate;
+    ss->channels = _ss.channels;
+    ss->format = _ss.format;
+
+    pa_assert(_period_size > 0);
+    pa_assert(_buffer_size > 0);
+
+    if (buffer_size)
+        *buffer_size = _buffer_size;
+
+    if (period_size)
+        *period_size = _period_size;
+
+    if (use_mmap)
+        *use_mmap = _use_mmap;
+
+    if (use_tsched)
+        *use_tsched = _use_tsched;
+
+    ret = 0;
+
+finish:
+
+    return ret;
+}
+
+int pa_alsa_set_sw_params(snd_pcm_t *pcm, snd_pcm_uframes_t avail_min, bool period_event) {
+    snd_pcm_sw_params_t *swparams;
+    snd_pcm_uframes_t boundary;
+    int err;
+
+    pa_assert(pcm);
+
+    snd_pcm_sw_params_alloca(&swparams);
+
+    if ((err = snd_pcm_sw_params_current(pcm, swparams)) < 0) {
+        pa_log_warn("Unable to determine current swparams: %s", pa_alsa_strerror(err));
+        return err;
+    }
+
+    if ((err = snd_pcm_sw_params_set_period_event(pcm, swparams, period_event)) < 0) {
+        pa_log_warn("Unable to disable period event: %s", pa_alsa_strerror(err));
+        return err;
+    }
+
+    if ((err = snd_pcm_sw_params_set_tstamp_mode(pcm, swparams, SND_PCM_TSTAMP_ENABLE)) < 0) {
+        pa_log_warn("Unable to enable time stamping: %s", pa_alsa_strerror(err));
+        return err;
+    }
+
+    if ((err = snd_pcm_sw_params_get_boundary(swparams, &boundary)) < 0) {
+        pa_log_warn("Unable to get boundary: %s", pa_alsa_strerror(err));
+        return err;
+    }
+
+    if ((err = snd_pcm_sw_params_set_stop_threshold(pcm, swparams, boundary)) < 0) {
+        pa_log_warn("Unable to set stop threshold: %s", pa_alsa_strerror(err));
+        return err;
+    }
+
+    if ((err = snd_pcm_sw_params_set_start_threshold(pcm, swparams, (snd_pcm_uframes_t) -1)) < 0) {
+        pa_log_warn("Unable to set start threshold: %s", pa_alsa_strerror(err));
+        return err;
+    }
+
+    if ((err = snd_pcm_sw_params_set_avail_min(pcm, swparams, avail_min)) < 0) {
+        pa_log_error("snd_pcm_sw_params_set_avail_min() failed: %s", pa_alsa_strerror(err));
+        return err;
+    }
+
+    if ((err = snd_pcm_sw_params(pcm, swparams)) < 0) {
+        pa_log_warn("Unable to set sw params: %s", pa_alsa_strerror(err));
+        return err;
+    }
+
+    return 0;
+}
+
+#if 0
+snd_pcm_t *pa_alsa_open_by_device_id_auto(
+        const char *dev_id,
+        char **dev,
+        pa_sample_spec *ss,
+        pa_channel_map* map,
+        int mode,
+        snd_pcm_uframes_t *period_size,
+        snd_pcm_uframes_t *buffer_size,
+        snd_pcm_uframes_t tsched_size,
+        bool *use_mmap,
+        bool *use_tsched,
+        pa_alsa_profile_set *ps,
+        pa_alsa_mapping **mapping) {
+
+    char *d;
+    snd_pcm_t *pcm_handle;
+    void *state;
+    pa_alsa_mapping *m;
+
+    pa_assert(dev_id);
+    pa_assert(dev);
+    pa_assert(ss);
+    pa_assert(map);
+    pa_assert(ps);
+
+    /* First we try to find a device string with a superset of the
+     * requested channel map. We iterate through our device table from
+     * top to bottom and take the first that matches. If we didn't
+     * find a working device that way, we iterate backwards, and check
+     * all devices that do not provide a superset of the requested
+     * channel map.*/
+
+    PA_HASHMAP_FOREACH(m, ps->mappings, state) {
+        if (!pa_channel_map_superset(&m->channel_map, map))
+            continue;
+
+        pa_log_debug("Checking for superset %s (%s)", m->name, m->device_strings[0]);
+
+        pcm_handle = pa_alsa_open_by_device_id_mapping(
+                dev_id,
+                dev,
+                ss,
+                map,
+                mode,
+                period_size,
+                buffer_size,
+                tsched_size,
+                use_mmap,
+                use_tsched,
+                m);
+
+        if (pcm_handle) {
+            if (mapping)
+                *mapping = m;
+
+            return pcm_handle;
+        }
+    }
+
+    PA_HASHMAP_FOREACH_BACKWARDS(m, ps->mappings, state) {
+        if (pa_channel_map_superset(&m->channel_map, map))
+            continue;
+
+        pa_log_debug("Checking for subset %s (%s)", m->name, m->device_strings[0]);
+
+        pcm_handle = pa_alsa_open_by_device_id_mapping(
+                dev_id,
+                dev,
+                ss,
+                map,
+                mode,
+                period_size,
+                buffer_size,
+                tsched_size,
+                use_mmap,
+                use_tsched,
+                m);
+
+        if (pcm_handle) {
+            if (mapping)
+                *mapping = m;
+
+            return pcm_handle;
+        }
+    }
+
+    /* OK, we didn't find any good device, so let's try the raw hw: stuff */
+    d = pa_sprintf_malloc("hw:%s", dev_id);
+    pa_log_debug("Trying %s as last resort...", d);
+    pcm_handle = pa_alsa_open_by_device_string(
+            d,
+            dev,
+            ss,
+            map,
+            mode,
+            period_size,
+            buffer_size,
+            tsched_size,
+            use_mmap,
+            use_tsched,
+            false);
+    pa_xfree(d);
+
+    if (pcm_handle && mapping)
+        *mapping = NULL;
+
+    return pcm_handle;
+}
+#endif
+
+snd_pcm_t *pa_alsa_open_by_device_id_mapping(
+        const char *dev_id,
+        char **dev,
+        pa_sample_spec *ss,
+        pa_channel_map* map,
+        int mode,
+        snd_pcm_uframes_t *period_size,
+        snd_pcm_uframes_t *buffer_size,
+        snd_pcm_uframes_t tsched_size,
+        bool *use_mmap,
+        bool *use_tsched,
+        pa_alsa_mapping *m) {
+
+    snd_pcm_t *pcm_handle;
+    pa_sample_spec try_ss;
+    pa_channel_map try_map;
+
+    pa_assert(dev_id);
+    pa_assert(dev);
+    pa_assert(ss);
+    pa_assert(map);
+    pa_assert(m);
+
+    try_ss.channels = m->channel_map.channels;
+    try_ss.rate = ss->rate;
+    try_ss.format = ss->format;
+    try_map = m->channel_map;
+
+    pcm_handle = pa_alsa_open_by_template(
+            m->device_strings,
+            dev_id,
+            dev,
+            &try_ss,
+            &try_map,
+            mode,
+            period_size,
+            buffer_size,
+            tsched_size,
+            use_mmap,
+            use_tsched,
+            pa_channel_map_valid(&m->channel_map) /* Query the channel count if we don't know what we want */);
+
+    if (!pcm_handle)
+        return NULL;
+
+    *ss = try_ss;
+    *map = try_map;
+    pa_assert(map->channels == ss->channels);
+
+    return pcm_handle;
+}
+
+int pa_alsa_close(snd_pcm_t **pcm)
+{
+    int err;
+    pa_assert(pcm);
+    pa_log_info("ALSA device close %p", *pcm);
+    if (*pcm == NULL)
+	    return 0;
+    if ((err = snd_pcm_close(*pcm)) < 0) {
+        pa_log_warn("ALSA close failed: %s", snd_strerror(err));
+    }
+    *pcm = NULL;
+    return err;
+}
+
+snd_pcm_t *pa_alsa_open_by_device_string(
+        const char *device,
+        char **dev,
+        pa_sample_spec *ss,
+        pa_channel_map* map,
+        int mode,
+        snd_pcm_uframes_t *period_size,
+        snd_pcm_uframes_t *buffer_size,
+        snd_pcm_uframes_t tsched_size,
+        bool *use_mmap,
+        bool *use_tsched,
+        bool require_exact_channel_number) {
+
+    int err;
+    char *d;
+    snd_pcm_t *pcm_handle;
+    bool reformat = false;
+
+    pa_assert(device);
+    pa_assert(ss);
+    pa_assert(map);
+
+    d = pa_xstrdup(device);
+
+    for (;;) {
+        pa_log_debug("Trying %s %s SND_PCM_NO_AUTO_FORMAT ...", d, reformat ? "without" : "with");
+
+        if ((err = snd_pcm_open(&pcm_handle, d, mode,
+                                SND_PCM_NONBLOCK|
+                                SND_PCM_NO_AUTO_RESAMPLE|
+                                SND_PCM_NO_AUTO_CHANNELS|
+                                (reformat ? 0 : SND_PCM_NO_AUTO_FORMAT))) < 0) {
+            pa_log_info("Error opening PCM device %s: %s", d, pa_alsa_strerror(err));
+            goto fail;
+        }
+        pa_log_info("ALSA device open '%s' %s: %p", d,
+			mode == SND_PCM_STREAM_CAPTURE ? "capture" : "playback", pcm_handle);
+
+        if ((err = pa_alsa_set_hw_params(
+                     pcm_handle,
+                     ss,
+                     period_size,
+                     buffer_size,
+                     tsched_size,
+                     use_mmap,
+                     use_tsched,
+                     require_exact_channel_number)) < 0) {
+
+            if (!reformat) {
+                reformat = true;
+
+                pa_alsa_close(&pcm_handle);
+                continue;
+            }
+
+            /* Hmm, some hw is very exotic, so we retry with plug, if without it didn't work */
+            if (!pa_startswith(d, "plug:") && !pa_startswith(d, "plughw:")) {
+                char *t;
+
+                t = pa_sprintf_malloc("plug:SLAVE='%s'", d);
+                pa_xfree(d);
+                d = t;
+
+                reformat = false;
+
+                pa_alsa_close(&pcm_handle);
+                continue;
+            }
+
+            pa_log_info("Failed to set hardware parameters on %s: %s", d, pa_alsa_strerror(err));
+            pa_alsa_close(&pcm_handle);
+
+            goto fail;
+        }
+
+        if (ss->channels > PA_CHANNELS_MAX) {
+            pa_log("Device %s has %u channels, but PulseAudio supports only %u channels. Unable to use the device.",
+                   d, ss->channels, PA_CHANNELS_MAX);
+            pa_alsa_close(&pcm_handle);
+            goto fail;
+        }
+
+        if (dev)
+            *dev = d;
+        else
+            pa_xfree(d);
+
+        if (ss->channels != map->channels)
+            pa_channel_map_init_extend(map, ss->channels, PA_CHANNEL_MAP_ALSA);
+
+        return pcm_handle;
+    }
+
+fail:
+    pa_xfree(d);
+
+    return NULL;
+}
+
+snd_pcm_t *pa_alsa_open_by_template(
+        char **template,
+        const char *dev_id,
+        char **dev,
+        pa_sample_spec *ss,
+        pa_channel_map* map,
+        int mode,
+        snd_pcm_uframes_t *period_size,
+        snd_pcm_uframes_t *buffer_size,
+        snd_pcm_uframes_t tsched_size,
+        bool *use_mmap,
+        bool *use_tsched,
+        bool require_exact_channel_number) {
+
+    snd_pcm_t *pcm_handle;
+    char **i;
+
+    for (i = template; *i; i++) {
+        char *d;
+
+        d = pa_replace(*i, "%f", dev_id);
+
+        pcm_handle = pa_alsa_open_by_device_string(
+                d,
+                dev,
+                ss,
+                map,
+                mode,
+                period_size,
+                buffer_size,
+                tsched_size,
+                use_mmap,
+                use_tsched,
+                require_exact_channel_number);
+
+        pa_xfree(d);
+
+        if (pcm_handle)
+            return pcm_handle;
+    }
+
+    return NULL;
+}
+
+void pa_alsa_dump(pa_log_level_t level, snd_pcm_t *pcm) {
+    int err;
+    snd_output_t *out;
+
+    pa_assert(pcm);
+
+    pa_assert_se(snd_output_buffer_open(&out) == 0);
+
+    if ((err = snd_pcm_dump(pcm, out)) < 0)
+        pa_logl(level, "snd_pcm_dump(): %s", pa_alsa_strerror(err));
+    else {
+        char *s = NULL;
+        snd_output_buffer_string(out, &s);
+        pa_logl(level, "snd_pcm_dump():\n%s", pa_strnull(s));
+    }
+
+    pa_assert_se(snd_output_close(out) == 0);
+}
+
+#if 0
+void pa_alsa_dump_status(snd_pcm_t *pcm) {
+    int err;
+    snd_output_t *out;
+    snd_pcm_status_t *status;
+    char *s = NULL;
+
+    pa_assert(pcm);
+
+    snd_pcm_status_alloca(&status);
+
+    if ((err = snd_output_buffer_open(&out)) < 0) {
+        pa_log_debug("snd_output_buffer_open() failed: %s", pa_cstrerror(err));
+        return;
+    }
+
+    if ((err = snd_pcm_status(pcm, status)) < 0) {
+        pa_log_debug("snd_pcm_status() failed: %s", pa_cstrerror(err));
+        goto finish;
+    }
+
+    if ((err = snd_pcm_status_dump(status, out)) < 0) {
+        pa_log_debug("snd_pcm_status_dump(): %s", pa_alsa_strerror(err));
+        goto finish;
+    }
+
+    snd_output_buffer_string(out, &s);
+    pa_log_debug("snd_pcm_status_dump():\n%s", pa_strnull(s));
+
+finish:
+
+    snd_output_close(out);
+}
+#endif
+
+static PA_PRINTF_FUNC(5,6) void alsa_error_handler(const char *file, int line, const char *function, int err, const char *fmt,...) {
+    va_list ap;
+//    char *alsa_file;
+
+//    alsa_file = pa_sprintf_malloc("(alsa-lib)%s", file);
+
+    va_start(ap, fmt);
+
+    pa_log_levelv_meta(PA_LOG_INFO, file, line, function, fmt, ap);
+
+    va_end(ap);
+
+//    pa_xfree(alsa_file);
+}
+
+static int n_error_handler_installed = 0;
+
+typedef void (*snd_lib2_error_handler_t)(const char *file, int line, const char *function, int err, const char *fmt, ...) PA_PRINTF_FUNC(5,6) /* __attribute__ ((format (printf, 5, 6))) */;
+
+extern int snd_lib_error_set_handler(snd_lib2_error_handler_t handler);
+
+void pa_alsa_refcnt_inc(void) {
+    /* This is not really thread safe, but we do our best */
+   if (n_error_handler_installed++ == 0)
+        snd_lib_error_set_handler(alsa_error_handler);
+}
+
+void pa_alsa_refcnt_dec(void) {
+    int r;
+
+    pa_assert_se((r = n_error_handler_installed--) >= 1);
+
+    if (r == 1) {
+        snd_lib_error_set_handler(NULL);
+        snd_config_update_free_global();
+    }
+}
+
+bool pa_alsa_init_description(pa_proplist *p, pa_card *card) {
+    const char *d, *k;
+    pa_assert(p);
+
+    if (pa_alsa_device_init_description(p, card))
+        return true;
+
+    if (!(d = pa_proplist_gets(p, "alsa.card_name")))
+        d = pa_proplist_gets(p, "alsa.name");
+
+    if (!d)
+        return false;
+
+    k = pa_proplist_gets(p, PA_PROP_DEVICE_PROFILE_DESCRIPTION);
+
+    if (d && k)
+        pa_proplist_setf(p, PA_PROP_DEVICE_DESCRIPTION, "%s %s", d, k);
+    else if (d)
+        pa_proplist_sets(p, PA_PROP_DEVICE_DESCRIPTION, d);
+
+    return false;
+}
+
+void pa_alsa_init_proplist_card(pa_core *c, pa_proplist *p, int card) {
+    char *cn, *lcn, *dn;
+
+    pa_assert(p);
+    pa_assert(card >= 0);
+
+    pa_proplist_setf(p, "alsa.card", "%i", card);
+
+    if (snd_card_get_name(card, &cn) >= 0) {
+        pa_proplist_sets(p, "alsa.card_name", pa_strip(cn));
+        free(cn);
+    }
+
+    if (snd_card_get_longname(card, &lcn) >= 0) {
+        pa_proplist_sets(p, "alsa.long_card_name", pa_strip(lcn));
+        free(lcn);
+    }
+
+    if ((dn = pa_alsa_get_driver_name(card))) {
+        pa_proplist_sets(p, "alsa.driver_name", dn);
+        pa_xfree(dn);
+    }
+
+#ifdef HAVE_UDEV
+    pa_udev_get_info(card, p);
+#endif
+}
+
+void pa_alsa_init_proplist_pcm_info(pa_core *c, pa_proplist *p, snd_pcm_info_t *pcm_info) {
+
+    static const char * const alsa_class_table[SND_PCM_CLASS_LAST+1] = {
+        [SND_PCM_CLASS_GENERIC] = "generic",
+        [SND_PCM_CLASS_MULTI] = "multi",
+        [SND_PCM_CLASS_MODEM] = "modem",
+        [SND_PCM_CLASS_DIGITIZER] = "digitizer"
+    };
+    static const char * const class_table[SND_PCM_CLASS_LAST+1] = {
+        [SND_PCM_CLASS_GENERIC] = "sound",
+        [SND_PCM_CLASS_MULTI] = NULL,
+        [SND_PCM_CLASS_MODEM] = "modem",
+        [SND_PCM_CLASS_DIGITIZER] = NULL
+    };
+    static const char * const alsa_subclass_table[SND_PCM_SUBCLASS_LAST+1] = {
+        [SND_PCM_SUBCLASS_GENERIC_MIX] = "generic-mix",
+        [SND_PCM_SUBCLASS_MULTI_MIX] = "multi-mix"
+    };
+
+    snd_pcm_class_t class;
+    snd_pcm_subclass_t subclass;
+    const char *n, *id, *sdn;
+    int card;
+
+    pa_assert(p);
+    pa_assert(pcm_info);
+
+    pa_proplist_sets(p, PA_PROP_DEVICE_API, "alsa");
+
+    if ((class = snd_pcm_info_get_class(pcm_info)) <= SND_PCM_CLASS_LAST) {
+        if (class_table[class])
+            pa_proplist_sets(p, PA_PROP_DEVICE_CLASS, class_table[class]);
+        if (alsa_class_table[class])
+            pa_proplist_sets(p, "alsa.class", alsa_class_table[class]);
+    }
+
+    if ((subclass = snd_pcm_info_get_subclass(pcm_info)) <= SND_PCM_SUBCLASS_LAST)
+        if (alsa_subclass_table[subclass])
+            pa_proplist_sets(p, "alsa.subclass", alsa_subclass_table[subclass]);
+
+    if ((n = snd_pcm_info_get_name(pcm_info))) {
+        char *t = pa_xstrdup(n);
+        pa_proplist_sets(p, "alsa.name", pa_strip(t));
+        pa_xfree(t);
+    }
+
+    if ((id = snd_pcm_info_get_id(pcm_info)))
+        pa_proplist_sets(p, "alsa.id", id);
+
+    pa_proplist_setf(p, "alsa.subdevice", "%u", snd_pcm_info_get_subdevice(pcm_info));
+    if ((sdn = snd_pcm_info_get_subdevice_name(pcm_info)))
+        pa_proplist_sets(p, "alsa.subdevice_name", sdn);
+
+    pa_proplist_setf(p, "alsa.device", "%u", snd_pcm_info_get_device(pcm_info));
+
+    if ((card = snd_pcm_info_get_card(pcm_info)) >= 0)
+        pa_alsa_init_proplist_card(c, p, card);
+}
+
+void pa_alsa_init_proplist_pcm(pa_core *c, pa_proplist *p, snd_pcm_t *pcm) {
+    snd_pcm_hw_params_t *hwparams;
+    snd_pcm_info_t *info;
+    int bits, err;
+
+    snd_pcm_hw_params_alloca(&hwparams);
+    snd_pcm_info_alloca(&info);
+
+    if ((err = snd_pcm_hw_params_current(pcm, hwparams)) < 0)
+        pa_log_warn("Error fetching hardware parameter info: %s", pa_alsa_strerror(err));
+    else {
+
+        if ((bits = snd_pcm_hw_params_get_sbits(hwparams)) >= 0)
+            pa_proplist_setf(p, "alsa.resolution_bits", "%i", bits);
+    }
+
+    if ((err = snd_pcm_info(pcm, info)) < 0)
+        pa_log_warn("Error fetching PCM info: %s", pa_alsa_strerror(err));
+    else
+        pa_alsa_init_proplist_pcm_info(c, p, info);
+}
+
+#if 0
+void pa_alsa_init_proplist_ctl(pa_proplist *p, const char *name) {
+    int err;
+    snd_ctl_t *ctl;
+    snd_ctl_card_info_t *info;
+    const char *t;
+
+    pa_assert(p);
+
+    snd_ctl_card_info_alloca(&info);
+
+    if ((err = snd_ctl_open(&ctl, name, 0)) < 0) {
+        pa_log_warn("Error opening low-level control device '%s': %s", name, snd_strerror(err));
+        return;
+    }
+
+    if ((err = snd_ctl_card_info(ctl, info)) < 0) {
+        pa_log_warn("Control device %s card info: %s", name, snd_strerror(err));
+        snd_ctl_close(ctl);
+        return;
+    }
+
+    if ((t = snd_ctl_card_info_get_mixername(info)) && *t)
+        pa_proplist_sets(p, "alsa.mixer_name", t);
+
+    if ((t = snd_ctl_card_info_get_components(info)) && *t)
+        pa_proplist_sets(p, "alsa.components", t);
+
+    snd_ctl_close(ctl);
+}
+
+int pa_alsa_recover_from_poll(snd_pcm_t *pcm, int revents) {
+    snd_pcm_state_t state;
+    snd_pcm_hw_params_t *hwparams;
+    int err;
+
+    pa_assert(pcm);
+
+    if (revents & POLLERR)
+        pa_log_debug("Got POLLERR from ALSA");
+    if (revents & POLLNVAL)
+        pa_log_warn("Got POLLNVAL from ALSA");
+    if (revents & POLLHUP)
+        pa_log_warn("Got POLLHUP from ALSA");
+    if (revents & POLLPRI)
+        pa_log_warn("Got POLLPRI from ALSA");
+    if (revents & POLLIN)
+        pa_log_debug("Got POLLIN from ALSA");
+    if (revents & POLLOUT)
+        pa_log_debug("Got POLLOUT from ALSA");
+
+    state = snd_pcm_state(pcm);
+    pa_log_debug("PCM state is %s", snd_pcm_state_name(state));
+
+    /* Try to recover from this error */
+
+    switch (state) {
+
+        case SND_PCM_STATE_DISCONNECTED:
+            /* Do not try to recover */
+            pa_log_info("Device disconnected.");
+            return -1;
+
+        case SND_PCM_STATE_XRUN:
+            if ((err = snd_pcm_recover(pcm, -EPIPE, 1)) != 0) {
+                pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP and XRUN: %s", pa_alsa_strerror(err));
+                return -1;
+            }
+            break;
+
+        case SND_PCM_STATE_SUSPENDED:
+            snd_pcm_hw_params_alloca(&hwparams);
+
+            if ((err = snd_pcm_hw_params_any(pcm, hwparams)) < 0) {
+		pa_log_debug("snd_pcm_hw_params_any() failed: %s", pa_alsa_strerror(err));
+		return -1;
+            }
+
+            if (snd_pcm_hw_params_can_resume(hwparams)) {
+                /* Retry resume 3 times before giving up, then fallback to restarting the stream. */
+                for (int i = 0; i < 3; i++) {
+                    if ((err = snd_pcm_resume(pcm)) == 0)
+                        return 0;
+                    if (err != -EAGAIN)
+                        break;
+                    pa_msleep(25);
+                }
+                pa_log_warn("Could not recover alsa device from SUSPENDED state, trying to restart PCM");
+	    }
+	    /* Fall through */
+
+        default:
+
+            snd_pcm_drop(pcm);
+            return 1;
+    }
+
+    return 0;
+}
+
+pa_rtpoll_item* pa_alsa_build_pollfd(snd_pcm_t *pcm, pa_rtpoll *rtpoll) {
+    int n, err;
+    struct pollfd *pollfd;
+    pa_rtpoll_item *item;
+
+    pa_assert(pcm);
+
+    if ((n = snd_pcm_poll_descriptors_count(pcm)) < 0) {
+        pa_log("snd_pcm_poll_descriptors_count() failed: %s", pa_alsa_strerror(n));
+        return NULL;
+    }
+
+    item = pa_rtpoll_item_new(rtpoll, PA_RTPOLL_NEVER, (unsigned) n);
+    pollfd = pa_rtpoll_item_get_pollfd(item, NULL);
+
+    if ((err = snd_pcm_poll_descriptors(pcm, pollfd, (unsigned) n)) < 0) {
+        pa_log("snd_pcm_poll_descriptors() failed: %s", pa_alsa_strerror(err));
+        pa_rtpoll_item_free(item);
+        return NULL;
+    }
+
+    return item;
+}
+
+snd_pcm_sframes_t pa_alsa_safe_avail(snd_pcm_t *pcm, size_t hwbuf_size, const pa_sample_spec *ss) {
+    snd_pcm_sframes_t n;
+    size_t k;
+
+    pa_assert(pcm);
+    pa_assert(hwbuf_size > 0);
+    pa_assert(ss);
+
+    /* Some ALSA driver expose weird bugs, let's inform the user about
+     * what is going on */
+
+    n = snd_pcm_avail(pcm);
+
+    if (n <= 0)
+        return n;
+
+    k = (size_t) n * pa_frame_size(ss);
+
+    if (PA_UNLIKELY(k >= hwbuf_size * 5 ||
+                    k >= pa_bytes_per_second(ss)*10)) {
+
+        PA_ONCE_BEGIN {
+            char *dn = pa_alsa_get_driver_name_by_pcm(pcm);
+            pa_log_debug(ngettext("snd_pcm_avail() returned a value that is exceptionally large: %lu byte (%lu ms).\n"
+                            "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.",
+                            "snd_pcm_avail() returned a value that is exceptionally large: %lu bytes (%lu ms).\n"
+                            "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.",
+                            (unsigned long) k),
+                   (unsigned long) k,
+                   (unsigned long) (pa_bytes_to_usec(k, ss) / PA_USEC_PER_MSEC),
+                   pa_strnull(dn));
+            pa_xfree(dn);
+            pa_alsa_dump(PA_LOG_DEBUG, pcm);
+        } PA_ONCE_END;
+
+        /* Mhmm, let's try not to fail completely */
+        n = (snd_pcm_sframes_t) (hwbuf_size / pa_frame_size(ss));
+    }
+
+    return n;
+}
+
+int pa_alsa_safe_delay(snd_pcm_t *pcm, snd_pcm_status_t *status, snd_pcm_sframes_t *delay, size_t hwbuf_size, const pa_sample_spec *ss,
+                       bool capture) {
+    ssize_t k;
+    size_t abs_k;
+    int err;
+    snd_pcm_sframes_t avail = 0;
+#if (SND_LIB_VERSION >= ((1<<16)|(1<<8)|0)) /* API additions in 1.1.0 */
+    snd_pcm_audio_tstamp_config_t tstamp_config;
+#endif
+
+    pa_assert(pcm);
+    pa_assert(delay);
+    pa_assert(hwbuf_size > 0);
+    pa_assert(ss);
+
+    /* Some ALSA driver expose weird bugs, let's inform the user about
+     * what is going on. We're going to get both the avail and delay values so
+     * that we can compare and check them for capture.
+     * This is done with snd_pcm_status() which provides
+     * avail, delay and timestamp values in a single kernel call to improve
+     * timer-based scheduling */
+
+#if (SND_LIB_VERSION >= ((1<<16)|(1<<8)|0)) /* API additions in 1.1.0 */
+
+    /* The time stamp configuration needs to be set so that the
+     * ALSA code will use the internal delay reported by the driver.
+     * The time stamp configuration was introduced in alsa version 1.1.0. */
+    tstamp_config.type_requested = 1; /* ALSA default time stamp type */
+    tstamp_config.report_delay = 1;
+    snd_pcm_status_set_audio_htstamp_config(status, &tstamp_config);
+#endif
+
+    if ((err = snd_pcm_status(pcm, status)) < 0)
+        return err;
+
+    avail = snd_pcm_status_get_avail(status);
+    *delay = snd_pcm_status_get_delay(status);
+
+    k = (ssize_t) *delay * (ssize_t) pa_frame_size(ss);
+
+    abs_k = k >= 0 ? (size_t) k : (size_t) -k;
+
+    if (PA_UNLIKELY(abs_k >= hwbuf_size * 5 ||
+                    abs_k >= pa_bytes_per_second(ss)*10)) {
+
+        PA_ONCE_BEGIN {
+            char *dn = pa_alsa_get_driver_name_by_pcm(pcm);
+            pa_log_debug(ngettext("snd_pcm_delay() returned a value that is exceptionally large: %li byte (%s%lu ms).\n"
+                            "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.",
+                            "snd_pcm_delay() returned a value that is exceptionally large: %li bytes (%s%lu ms).\n"
+                            "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.",
+                            (signed long) k),
+                   (signed long) k,
+                   k < 0 ? "-" : "",
+                   (unsigned long) (pa_bytes_to_usec(abs_k, ss) / PA_USEC_PER_MSEC),
+                   pa_strnull(dn));
+            pa_xfree(dn);
+            pa_alsa_dump(PA_LOG_DEBUG, pcm);
+        } PA_ONCE_END;
+
+        /* Mhmm, let's try not to fail completely */
+        if (k < 0)
+            *delay = -(snd_pcm_sframes_t) (hwbuf_size / pa_frame_size(ss));
+        else
+            *delay = (snd_pcm_sframes_t) (hwbuf_size / pa_frame_size(ss));
+    }
+
+    if (capture) {
+        abs_k = (size_t) avail * pa_frame_size(ss);
+
+        if (PA_UNLIKELY(abs_k >= hwbuf_size * 5 ||
+                        abs_k >= pa_bytes_per_second(ss)*10)) {
+
+            PA_ONCE_BEGIN {
+                char *dn = pa_alsa_get_driver_name_by_pcm(pcm);
+                pa_log_debug(ngettext("snd_pcm_avail() returned a value that is exceptionally large: %lu byte (%lu ms).\n"
+                                "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.",
+                                "snd_pcm_avail() returned a value that is exceptionally large: %lu bytes (%lu ms).\n"
+                                "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.",
+                                (unsigned long) k),
+                       (unsigned long) k,
+                       (unsigned long) (pa_bytes_to_usec(k, ss) / PA_USEC_PER_MSEC),
+                       pa_strnull(dn));
+                pa_xfree(dn);
+                pa_alsa_dump(PA_LOG_DEBUG, pcm);
+            } PA_ONCE_END;
+
+            /* Mhmm, let's try not to fail completely */
+            avail = (snd_pcm_sframes_t) (hwbuf_size / pa_frame_size(ss));
+        }
+
+        if (PA_UNLIKELY(*delay < avail)) {
+            PA_ONCE_BEGIN {
+                char *dn = pa_alsa_get_driver_name_by_pcm(pcm);
+                pa_log(_("snd_pcm_avail_delay() returned strange values: delay %lu is less than avail %lu.\n"
+                         "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers."),
+                       (unsigned long) *delay,
+                       (unsigned long) avail,
+                       pa_strnull(dn));
+                pa_xfree(dn);
+                pa_alsa_dump(PA_LOG_ERROR, pcm);
+            } PA_ONCE_END;
+
+            /* try to fixup */
+            *delay = avail;
+        }
+    }
+
+    return 0;
+}
+
+int pa_alsa_safe_mmap_begin(snd_pcm_t *pcm, const snd_pcm_channel_area_t **areas, snd_pcm_uframes_t *offset, snd_pcm_uframes_t *frames, size_t hwbuf_size, const pa_sample_spec *ss) {
+    int r;
+    snd_pcm_uframes_t before;
+    size_t k;
+
+    pa_assert(pcm);
+    pa_assert(areas);
+    pa_assert(offset);
+    pa_assert(frames);
+    pa_assert(hwbuf_size > 0);
+    pa_assert(ss);
+
+    before = *frames;
+
+    r = snd_pcm_mmap_begin(pcm, areas, offset, frames);
+
+    if (r < 0)
+        return r;
+
+    k = (size_t) *frames * pa_frame_size(ss);
+
+    if (PA_UNLIKELY(*frames > before ||
+                    k >= hwbuf_size * 3 ||
+                    k >= pa_bytes_per_second(ss)*10))
+        PA_ONCE_BEGIN {
+            char *dn = pa_alsa_get_driver_name_by_pcm(pcm);
+            pa_log_debug(ngettext("snd_pcm_mmap_begin() returned a value that is exceptionally large: %lu byte (%lu ms).\n"
+                            "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.",
+                            "snd_pcm_mmap_begin() returned a value that is exceptionally large: %lu bytes (%lu ms).\n"
+                            "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.",
+                            (unsigned long) k),
+                   (unsigned long) k,
+                   (unsigned long) (pa_bytes_to_usec(k, ss) / PA_USEC_PER_MSEC),
+                   pa_strnull(dn));
+            pa_xfree(dn);
+            pa_alsa_dump(PA_LOG_DEBUG, pcm);
+        } PA_ONCE_END;
+
+    return r;
+}
+#endif
+
+char *pa_alsa_get_driver_name(int card) {
+    char *t, *m, *n;
+
+    pa_assert(card >= 0);
+
+    t = pa_sprintf_malloc("/sys/class/sound/card%i/device/driver/module", card);
+    m = pa_readlink(t);
+    pa_xfree(t);
+
+    if (!m)
+        return NULL;
+
+    n = pa_xstrdup(pa_path_get_filename(m));
+    pa_xfree(m);
+
+    return n;
+}
+
+char *pa_alsa_get_driver_name_by_pcm(snd_pcm_t *pcm) {
+    int card;
+    snd_pcm_info_t* info;
+    snd_pcm_info_alloca(&info);
+
+    pa_assert(pcm);
+
+    if (snd_pcm_info(pcm, info) < 0)
+        return NULL;
+
+    if ((card = snd_pcm_info_get_card(info)) < 0)
+        return NULL;
+
+    return pa_alsa_get_driver_name(card);
+}
+
+#if 0
+char *pa_alsa_get_reserve_name(const char *device) {
+    const char *t;
+    int i;
+
+    pa_assert(device);
+
+    if ((t = strchr(device, ':')))
+        device = t+1;
+
+    if ((i = snd_card_get_index(device)) < 0) {
+        int32_t k;
+
+        if (pa_atoi(device, &k) < 0)
+            return NULL;
+
+        i = (int) k;
+    }
+
+    return pa_sprintf_malloc("Audio%i", i);
+}
+
+unsigned int *pa_alsa_get_supported_rates(snd_pcm_t *pcm, unsigned int fallback_rate) {
+    static unsigned int all_rates[] = { 8000, 11025, 12000,
+                                        16000, 22050, 24000,
+                                        32000, 44100, 48000,
+                                        64000, 88200, 96000,
+                                        128000, 176400, 192000,
+                                        384000 };
+    bool supported[PA_ELEMENTSOF(all_rates)] = { false, };
+    snd_pcm_hw_params_t *hwparams;
+    unsigned int i, j, n, *rates = NULL;
+    int ret;
+
+    snd_pcm_hw_params_alloca(&hwparams);
+
+    if ((ret = snd_pcm_hw_params_any(pcm, hwparams)) < 0) {
+        pa_log_debug("snd_pcm_hw_params_any() failed: %s", pa_alsa_strerror(ret));
+        return NULL;
+    }
+
+    for (i = 0, n = 0; i < PA_ELEMENTSOF(all_rates); i++) {
+        if (snd_pcm_hw_params_test_rate(pcm, hwparams, all_rates[i], 0) == 0) {
+            supported[i] = true;
+            n++;
+        }
+    }
+
+    if (n > 0) {
+        rates = pa_xnew(unsigned int, n + 1);
+
+        for (i = 0, j = 0; i < PA_ELEMENTSOF(all_rates); i++) {
+            if (supported[i])
+                rates[j++] = all_rates[i];
+        }
+
+        rates[j] = 0;
+    } else {
+        rates = pa_xnew(unsigned int, 2);
+
+        rates[0] = fallback_rate;
+        if ((ret = snd_pcm_hw_params_set_rate_near(pcm, hwparams, &rates[0], NULL)) < 0) {
+            pa_log_debug("snd_pcm_hw_params_set_rate_near() failed: %s", pa_alsa_strerror(ret));
+            pa_xfree(rates);
+            return NULL;
+        }
+
+        rates[1] = 0;
+    }
+
+    return rates;
+}
+
+pa_sample_format_t *pa_alsa_get_supported_formats(snd_pcm_t *pcm, pa_sample_format_t fallback_format) {
+    static const snd_pcm_format_t format_trans_to_pa[] = {
+        [SND_PCM_FORMAT_U8] = PA_SAMPLE_U8,
+        [SND_PCM_FORMAT_A_LAW] = PA_SAMPLE_ALAW,
+        [SND_PCM_FORMAT_MU_LAW] = PA_SAMPLE_ULAW,
+        [SND_PCM_FORMAT_S16_LE] = PA_SAMPLE_S16LE,
+        [SND_PCM_FORMAT_S16_BE] = PA_SAMPLE_S16BE,
+        [SND_PCM_FORMAT_FLOAT_LE] = PA_SAMPLE_FLOAT32LE,
+        [SND_PCM_FORMAT_FLOAT_BE] = PA_SAMPLE_FLOAT32BE,
+        [SND_PCM_FORMAT_S32_LE] = PA_SAMPLE_S32LE,
+        [SND_PCM_FORMAT_S32_BE] = PA_SAMPLE_S32BE,
+        [SND_PCM_FORMAT_S24_3LE] = PA_SAMPLE_S24LE,
+        [SND_PCM_FORMAT_S24_3BE] = PA_SAMPLE_S24BE,
+        [SND_PCM_FORMAT_S24_LE] = PA_SAMPLE_S24_32LE,
+        [SND_PCM_FORMAT_S24_BE] = PA_SAMPLE_S24_32BE,
+    };
+    static const snd_pcm_format_t all_formats[] = {
+        SND_PCM_FORMAT_U8,
+        SND_PCM_FORMAT_A_LAW,
+        SND_PCM_FORMAT_MU_LAW,
+        SND_PCM_FORMAT_S16_LE,
+        SND_PCM_FORMAT_S16_BE,
+        SND_PCM_FORMAT_FLOAT_LE,
+        SND_PCM_FORMAT_FLOAT_BE,
+        SND_PCM_FORMAT_S32_LE,
+        SND_PCM_FORMAT_S32_BE,
+        SND_PCM_FORMAT_S24_3LE,
+        SND_PCM_FORMAT_S24_3BE,
+        SND_PCM_FORMAT_S24_LE,
+        SND_PCM_FORMAT_S24_BE,
+    };
+    bool supported[PA_ELEMENTSOF(all_formats)] = {
+        false,
+    };
+    snd_pcm_hw_params_t *hwparams;
+    unsigned int i, j, n;
+    pa_sample_format_t *formats = NULL;
+    int ret;
+
+    snd_pcm_hw_params_alloca(&hwparams);
+
+    if ((ret = snd_pcm_hw_params_any(pcm, hwparams)) < 0) {
+        pa_log_debug("snd_pcm_hw_params_any() failed: %s", pa_alsa_strerror(ret));
+        return NULL;
+    }
+
+    for (i = 0, n = 0; i < PA_ELEMENTSOF(all_formats); i++) {
+        if (snd_pcm_hw_params_test_format(pcm, hwparams, all_formats[i]) == 0) {
+            supported[i] = true;
+            n++;
+        }
+    }
+
+    if (n > 0) {
+        formats = pa_xnew(pa_sample_format_t, n + 1);
+
+        for (i = 0, j = 0; i < PA_ELEMENTSOF(all_formats); i++) {
+            if (supported[i])
+                formats[j++] = format_trans_to_pa[all_formats[i]];
+        }
+
+        formats[j] = PA_SAMPLE_MAX;
+    } else {
+        formats = pa_xnew(pa_sample_format_t, 2);
+
+        formats[0] = fallback_format;
+        if ((ret = snd_pcm_hw_params_set_format(pcm, hwparams, format_trans_to_pa[formats[0]])) < 0) {
+            pa_log_debug("snd_pcm_hw_params_set_format() failed: %s", pa_alsa_strerror(ret));
+            pa_xfree(formats);
+            return NULL;
+        }
+
+        formats[1] = PA_SAMPLE_MAX;
+    }
+
+    return formats;
+}
+#endif
+
+bool pa_alsa_pcm_is_hw(snd_pcm_t *pcm) {
+    snd_pcm_info_t* info;
+    snd_pcm_info_alloca(&info);
+
+    pa_assert(pcm);
+
+    if (snd_pcm_info(pcm, info) < 0)
+        return false;
+
+    return snd_pcm_info_get_card(info) >= 0;
+}
+
+bool pa_alsa_pcm_is_modem(snd_pcm_t *pcm) {
+    snd_pcm_info_t* info;
+    snd_pcm_info_alloca(&info);
+
+    pa_assert(pcm);
+
+    if (snd_pcm_info(pcm, info) < 0)
+        return false;
+
+    return snd_pcm_info_get_class(info) == SND_PCM_CLASS_MODEM;
+}
+
+const char* pa_alsa_strerror(int errnum) {
+    return snd_strerror(errnum);
+}
+
+#if 0
+bool pa_alsa_may_tsched(bool want) {
+
+    if (!want)
+        return false;
+
+    if (!pa_rtclock_hrtimer()) {
+        /* We cannot depend on being woken up in time when the timers
+        are inaccurate, so let's fallback to classic IO based playback
+        then. */
+        pa_log_notice("Disabling timer-based scheduling because high-resolution timers are not available from the kernel.");
+        return false; }
+
+    if (pa_running_in_vm()) {
+        /* We cannot depend on being woken up when we ask for in a VM,
+         * so let's fallback to classic IO based playback then. */
+        pa_log_notice("Disabling timer-based scheduling because running inside a VM.");
+        return false;
+    }
+
+    return true;
+}
+#endif
+
+#define SND_MIXER_ELEM_PULSEAUDIO (SND_MIXER_ELEM_LAST + 10)
+
+static snd_mixer_elem_t *pa_alsa_mixer_find(snd_mixer_t *mixer,
+                                            snd_ctl_elem_iface_t iface,
+                                            const char *name,
+                                            unsigned int index,
+                                            unsigned int device) {
+    snd_mixer_elem_t *elem;
+
+    for (elem = snd_mixer_first_elem(mixer); elem; elem = snd_mixer_elem_next(elem)) {
+        snd_hctl_elem_t *helem;
+        if (snd_mixer_elem_get_type(elem) != SND_MIXER_ELEM_PULSEAUDIO)
+            continue;
+        helem = snd_mixer_elem_get_private(elem);
+        if (snd_hctl_elem_get_interface(helem) != iface)
+            continue;
+        if (!pa_streq(snd_hctl_elem_get_name(helem), name))
+            continue;
+        if (snd_hctl_elem_get_index(helem) != index)
+            continue;
+        if (snd_hctl_elem_get_device(helem) != device)
+            continue;
+        return elem;
+    }
+    return NULL;
+}
+
+snd_mixer_elem_t *pa_alsa_mixer_find_card(snd_mixer_t *mixer, struct pa_alsa_mixer_id *alsa_id, unsigned int device) {
+    return pa_alsa_mixer_find(mixer, SND_CTL_ELEM_IFACE_CARD, alsa_id->name, alsa_id->index, device);
+}
+
+snd_mixer_elem_t *pa_alsa_mixer_find_pcm(snd_mixer_t *mixer, const char *name, unsigned int device) {
+    return pa_alsa_mixer_find(mixer, SND_CTL_ELEM_IFACE_PCM, name, 0, device);
+}
+
+static int mixer_class_compare(const snd_mixer_elem_t *c1, const snd_mixer_elem_t *c2)
+{
+    /* Dummy compare function */
+    return c1 == c2 ? 0 : (c1 > c2 ? 1 : -1);
+}
+
+static int mixer_class_event(snd_mixer_class_t *class, unsigned int mask,
+			snd_hctl_elem_t *helem, snd_mixer_elem_t *melem)
+{
+    int err;
+    const char *name = snd_hctl_elem_get_name(helem);
+    // NOTE: The remove event defined as '~0U`.
+    if (mask == SND_CTL_EVENT_MASK_REMOVE) {
+        // NOTE: unless remove pointer to melem from link-list at private_data of helem, hits
+	// assersion in alsa-lib since the list is not empty.
+        snd_mixer_elem_detach(melem, helem);
+    } else if (mask & SND_CTL_EVENT_MASK_ADD) {
+        snd_ctl_elem_iface_t iface = snd_hctl_elem_get_interface(helem);
+        if (iface == SND_CTL_ELEM_IFACE_CARD || iface == SND_CTL_ELEM_IFACE_PCM) {
+            snd_mixer_elem_t *new_melem;
+
+            /* Put the hctl pointer as our private data - it will be useful for callbacks */
+            if ((err = snd_mixer_elem_new(&new_melem, SND_MIXER_ELEM_PULSEAUDIO, 0, helem, NULL)) < 0) {
+                pa_log_warn("snd_mixer_elem_new failed: %s", pa_alsa_strerror(err));
+                return 0;
+            }
+
+            if ((err = snd_mixer_elem_attach(new_melem, helem)) < 0) {
+                pa_log_warn("snd_mixer_elem_attach failed: %s", pa_alsa_strerror(err));
+		snd_mixer_elem_free(melem);
+                return 0;
+            }
+
+            if ((err = snd_mixer_elem_add(new_melem, class)) < 0) {
+                pa_log_warn("snd_mixer_elem_add failed: %s", pa_alsa_strerror(err));
+                return 0;
+            }
+        }
+    }
+    else if (mask & SND_CTL_EVENT_MASK_VALUE) {
+        snd_mixer_elem_value(melem); /* Calls the element callback */
+        return 0;
+    }
+    else
+        pa_log_info("Got an unknown mixer class event for %s: mask 0x%x", name, mask);
+
+    return 0;
+}
+
+static int prepare_mixer(snd_mixer_t *mixer, const char *dev, snd_hctl_t *hctl) {
+    int err;
+    snd_mixer_class_t *class;
+
+    pa_assert(mixer);
+    pa_assert(dev);
+
+    if ((err = snd_mixer_attach_hctl(mixer, hctl)) < 0) {
+        pa_log_info("Unable to attach to mixer %s: %s", dev, pa_alsa_strerror(err));
+        return -1;
+    }
+
+    if (snd_mixer_class_malloc(&class)) {
+        pa_log_info("Failed to allocate mixer class for %s", dev);
+        return -1;
+    }
+    snd_mixer_class_set_event(class, mixer_class_event);
+    snd_mixer_class_set_compare(class, mixer_class_compare);
+    if ((err = snd_mixer_class_register(class, mixer)) < 0) {
+        pa_log_info("Unable register mixer class for %s: %s", dev, pa_alsa_strerror(err));
+        snd_mixer_class_free(class);
+        return -1;
+    }
+    /* From here on, the mixer class is deallocated by alsa on snd_mixer_close/free. */
+
+    if ((err = snd_mixer_selem_register(mixer, NULL, NULL)) < 0) {
+        pa_log_warn("Unable to register mixer: %s", pa_alsa_strerror(err));
+        return -1;
+    }
+
+    if ((err = snd_mixer_load(mixer)) < 0) {
+        pa_log_warn("Unable to load mixer: %s", pa_alsa_strerror(err));
+        return -1;
+    }
+
+    pa_log_info("Successfully attached to mixer '%s'", dev);
+    return 0;
+}
+
+snd_mixer_t *pa_alsa_open_mixer(pa_hashmap *mixers, int alsa_card_index, bool probe) {
+    char *md = pa_sprintf_malloc("hw:%i", alsa_card_index);
+    snd_mixer_t *m = pa_alsa_open_mixer_by_name(mixers, md, probe);
+    pa_xfree(md);
+    return m;
+}
+
+pa_alsa_mixer *pa_alsa_create_mixer(pa_hashmap *mixers, const char *dev, snd_mixer_t *m, bool probe) {
+    pa_alsa_mixer *pm;
+
+    pm = pa_xnew0(pa_alsa_mixer, 1);
+    if (pm == NULL)
+        return NULL;
+
+    pm->used_for_probe_only = probe;
+    pm->mixer_handle = m;
+    pa_hashmap_put(mixers, pa_xstrdup(dev), pm);
+    return pm;
+}
+
+snd_mixer_t *pa_alsa_open_mixer_by_name(pa_hashmap *mixers, const char *dev, bool probe) {
+    int err;
+    snd_mixer_t *m;
+    snd_hctl_t *hctl;
+    pa_alsa_mixer *pm;
+
+    pa_assert(mixers);
+    pa_assert(dev);
+
+    pm = pa_hashmap_get(mixers, dev);
+    if (pm) {
+        if (!probe)
+            pm->used_for_probe_only = false;
+        return pm->mixer_handle;
+    }
+
+    if ((err = snd_mixer_open(&m, 0)) < 0) {
+        pa_log("Error opening mixer: %s", pa_alsa_strerror(err));
+        return NULL;
+    }
+
+    err = snd_hctl_open(&hctl, dev, 0);
+    if (err < 0) {
+        pa_log("Error opening hctl device: %s", pa_alsa_strerror(err));
+        goto __close;
+    }
+
+    if (prepare_mixer(m, dev, hctl) >= 0) {
+        /* get the ALSA card number (index) and ID (alias) and create two identical mixers */
+        char *p, *dev2, *dev_idx, *dev_id;
+        snd_ctl_card_info_t *info;
+        snd_ctl_card_info_alloca(&info);
+        err = snd_ctl_card_info(snd_hctl_ctl(hctl), info);
+        if (err < 0)
+            goto __std;
+        dev2 = pa_xstrdup(dev);
+        if (dev2 == NULL)
+            goto __close;
+        p = strchr(dev2, ':');
+        /* sanity check - only hw: devices */
+        if (p == NULL || (p - dev2) < 2 || !pa_strneq(p - 2, "hw:", 3)) {
+            pa_xfree(dev2);
+            goto __std;
+        }
+        *p = '\0';
+        dev_idx = pa_sprintf_malloc("%s:%u", dev2, snd_ctl_card_info_get_card(info));
+        dev_id = pa_sprintf_malloc("%s:%s", dev2, snd_ctl_card_info_get_id(info));
+        pa_log_debug("ALSA alias mixers: %s = %s", dev_idx, dev_id);
+        if (dev_idx && dev_id && (strcmp(dev, dev_idx) == 0 || strcmp(dev, dev_id) == 0)) {
+            pm = pa_alsa_create_mixer(mixers, dev_idx, m, probe);
+            if (pm) {
+                pa_alsa_mixer *pm2;
+                pm2 = pa_alsa_create_mixer(mixers, dev_id, m, probe);
+                if (pm2) {
+                    pm->alias = pm2;
+                    pm2->alias = pm;
+                }
+            }
+        }
+        pa_xfree(dev_id);
+        pa_xfree(dev_idx);
+        pa_xfree(dev2);
+   __std:
+        if (pm == NULL)
+            pm = pa_alsa_create_mixer(mixers, dev, m, probe);
+        if (pm)
+            return m;
+    }
+
+__close:
+    snd_mixer_close(m);
+    return NULL;
+}
+
+snd_mixer_t *pa_alsa_open_mixer_for_pcm(pa_hashmap *mixers, snd_pcm_t *pcm, bool probe) {
+    snd_pcm_info_t* info;
+    snd_pcm_info_alloca(&info);
+
+    pa_assert(pcm);
+
+    if (snd_pcm_info(pcm, info) >= 0) {
+        int card_idx;
+
+        if ((card_idx = snd_pcm_info_get_card(info)) >= 0)
+            return pa_alsa_open_mixer(mixers, card_idx, probe);
+    }
+
+    return NULL;
+}
+
+#if 0
+void pa_alsa_mixer_set_fdlist(pa_hashmap *mixers, snd_mixer_t *mixer_handle, pa_mainloop_api *ml)
+{
+    pa_alsa_mixer *pm;
+    void *state;
+
+    PA_HASHMAP_FOREACH(pm, mixers, state)
+        if (pm->mixer_handle == mixer_handle) {
+            pm->used_for_probe_only = false;
+            if (!pm->fdl) {
+                pm->fdl = pa_alsa_fdlist_new();
+                if (pm->fdl)
+                    pa_alsa_fdlist_set_handle(pm->fdl, pm->mixer_handle, NULL, ml);
+            }
+        }
+}
+#endif
+
+void pa_alsa_mixer_free(pa_alsa_mixer *mixer)
+{
+    if (mixer->mixer_handle && mixer->alias == NULL)
+        snd_mixer_close(mixer->mixer_handle);
+    if (mixer->alias)
+        mixer->alias->alias = NULL;
+    pa_xfree(mixer);
+}
+
+int pa_alsa_get_hdmi_eld(snd_hctl_elem_t *elem, pa_hdmi_eld *eld) {
+
+    /* The ELD format is specific to HDA Intel sound cards and defined in the
+       HDA specification: http://www.intel.com/content/www/us/en/standards/high-definition-audio-specification.html */
+    int err;
+    snd_ctl_elem_info_t *info;
+    snd_ctl_elem_value_t *value;
+    uint8_t *elddata;
+    unsigned int eldsize, mnl;
+    unsigned int device;
+
+    pa_assert(eld != NULL);
+    pa_assert(elem != NULL);
+
+    /* Does it have any contents? */
+    snd_ctl_elem_info_alloca(&info);
+    snd_ctl_elem_value_alloca(&value);
+    if ((err = snd_hctl_elem_info(elem, info)) < 0 ||
+       (err = snd_hctl_elem_read(elem, value)) < 0) {
+        pa_log_warn("Accessing ELD control failed with error %s", snd_strerror(err));
+        return -1;
+    }
+
+    device = snd_hctl_elem_get_device(elem);
+    eldsize = snd_ctl_elem_info_get_count(info);
+    elddata = (unsigned char *) snd_ctl_elem_value_get_bytes(value);
+    if (elddata == NULL || eldsize == 0) {
+        pa_log_debug("ELD info empty (for device=%d)", device);
+        return -1;
+    }
+    if (eldsize < 20 || eldsize > 256) {
+        pa_log_debug("ELD info has wrong size (for device=%d)", device);
+        return -1;
+    }
+
+    /* Try to fetch monitor name */
+    mnl = elddata[4] & 0x1f;
+    if (mnl == 0 || mnl > 16 || 20 + mnl > eldsize) {
+        pa_log_debug("No monitor name in ELD info (for device=%d)", device);
+        mnl = 0;
+    }
+    memcpy(eld->monitor_name, &elddata[20], mnl);
+    eld->monitor_name[mnl] = '\0';
+    if (mnl)
+        pa_log_debug("Monitor name in ELD info is '%s' (for device=%d)", eld->monitor_name, device);
+
+    return 0;
+}
diff --git a/spa/plugins/alsa/acp/alsa-util.h b/spa/plugins/alsa/acp/alsa-util.h
new file mode 100644
index 0000000..b18b98d
--- /dev/null
+++ b/spa/plugins/alsa/acp/alsa-util.h
@@ -0,0 +1,176 @@
+#ifndef fooalsautilhfoo
+#define fooalsautilhfoo
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdbool.h>
+
+#include <alsa/asoundlib.h>
+
+#include "compat.h"
+
+#include "alsa-mixer.h"
+
+enum {
+    PA_ALSA_ERR_UNSPECIFIED = 1,
+    PA_ALSA_ERR_UCM_OPEN = 1000,
+    PA_ALSA_ERR_UCM_NO_VERB = 1001,
+    PA_ALSA_ERR_UCM_LINKED = 1002
+};
+
+int pa_alsa_set_hw_params(
+        snd_pcm_t *pcm_handle,
+        pa_sample_spec *ss,                /* modified at return */
+        snd_pcm_uframes_t *period_size,    /* modified at return */
+        snd_pcm_uframes_t *buffer_size,    /* modified at return */
+        snd_pcm_uframes_t tsched_size,
+        bool *use_mmap,                    /* modified at return */
+        bool *use_tsched,                  /* modified at return */
+        bool require_exact_channel_number);
+
+int pa_alsa_set_sw_params(
+        snd_pcm_t *pcm,
+        snd_pcm_uframes_t avail_min,
+        bool period_event);
+
+#if 0
+/* Picks a working mapping from the profile set based on the specified ss/map */
+snd_pcm_t *pa_alsa_open_by_device_id_auto(
+        const char *dev_id,
+        char **dev,                       /* modified at return */
+        pa_sample_spec *ss,               /* modified at return */
+        pa_channel_map* map,              /* modified at return */
+        int mode,
+        snd_pcm_uframes_t *period_size,   /* modified at return */
+        snd_pcm_uframes_t *buffer_size,   /* modified at return */
+        snd_pcm_uframes_t tsched_size,
+        bool *use_mmap,                   /* modified at return */
+        bool *use_tsched,                 /* modified at return */
+        pa_alsa_profile_set *ps,
+        pa_alsa_mapping **mapping);       /* modified at return */
+#endif
+
+/* Uses the specified mapping */
+snd_pcm_t *pa_alsa_open_by_device_id_mapping(
+        const char *dev_id,
+        char **dev,                       /* modified at return */
+        pa_sample_spec *ss,               /* modified at return */
+        pa_channel_map* map,              /* modified at return */
+        int mode,
+        snd_pcm_uframes_t *period_size,   /* modified at return */
+        snd_pcm_uframes_t *buffer_size,   /* modified at return */
+        snd_pcm_uframes_t tsched_size,
+        bool *use_mmap,                   /* modified at return */
+        bool *use_tsched,                 /* modified at return */
+        pa_alsa_mapping *mapping);
+
+/* Opens the explicit ALSA device */
+snd_pcm_t *pa_alsa_open_by_device_string(
+        const char *dir,
+        char **dev,                       /* modified at return */
+        pa_sample_spec *ss,               /* modified at return */
+        pa_channel_map* map,              /* modified at return */
+        int mode,
+        snd_pcm_uframes_t *period_size,   /* modified at return */
+        snd_pcm_uframes_t *buffer_size,   /* modified at return */
+        snd_pcm_uframes_t tsched_size,
+        bool *use_mmap,                   /* modified at return */
+        bool *use_tsched,                 /* modified at return */
+        bool require_exact_channel_number);
+
+/* Opens the explicit ALSA device with a fallback list */
+snd_pcm_t *pa_alsa_open_by_template(
+        char **template,
+        const char *dev_id,
+        char **dev,                       /* modified at return */
+        pa_sample_spec *ss,               /* modified at return */
+        pa_channel_map* map,              /* modified at return */
+        int mode,
+        snd_pcm_uframes_t *period_size,   /* modified at return */
+        snd_pcm_uframes_t *buffer_size,   /* modified at return */
+        snd_pcm_uframes_t tsched_size,
+        bool *use_mmap,                   /* modified at return */
+        bool *use_tsched,                 /* modified at return */
+        bool require_exact_channel_number);
+
+#if 0
+void pa_alsa_dump(pa_log_level_t level, snd_pcm_t *pcm);
+void pa_alsa_dump_status(snd_pcm_t *pcm);
+#endif
+int pa_alsa_close(snd_pcm_t **pcm);
+
+void pa_alsa_refcnt_inc(void);
+void pa_alsa_refcnt_dec(void);
+
+void pa_alsa_init_proplist_pcm_info(pa_core *c, pa_proplist *p, snd_pcm_info_t *pcm_info);
+void pa_alsa_init_proplist_card(pa_core *c, pa_proplist *p, int card);
+void pa_alsa_init_proplist_pcm(pa_core *c, pa_proplist *p, snd_pcm_t *pcm);
+#if 0
+void pa_alsa_init_proplist_ctl(pa_proplist *p, const char *name);
+#endif
+bool pa_alsa_init_description(pa_proplist *p, pa_card *card);
+
+#if 0
+int pa_alsa_recover_from_poll(snd_pcm_t *pcm, int revents);
+
+pa_rtpoll_item* pa_alsa_build_pollfd(snd_pcm_t *pcm, pa_rtpoll *rtpoll);
+
+snd_pcm_sframes_t pa_alsa_safe_avail(snd_pcm_t *pcm, size_t hwbuf_size, const pa_sample_spec *ss);
+int pa_alsa_safe_delay(snd_pcm_t *pcm, snd_pcm_status_t *status, snd_pcm_sframes_t *delay, size_t hwbuf_size, const pa_sample_spec *ss, bool capture);
+int pa_alsa_safe_mmap_begin(snd_pcm_t *pcm, const snd_pcm_channel_area_t **areas, snd_pcm_uframes_t *offset, snd_pcm_uframes_t *frames, size_t hwbuf_size, const pa_sample_spec *ss);
+#endif
+
+char *pa_alsa_get_driver_name(int card);
+char *pa_alsa_get_driver_name_by_pcm(snd_pcm_t *pcm);
+
+char *pa_alsa_get_reserve_name(const char *device);
+
+unsigned int *pa_alsa_get_supported_rates(snd_pcm_t *pcm, unsigned int fallback_rate);
+pa_sample_format_t *pa_alsa_get_supported_formats(snd_pcm_t *pcm, pa_sample_format_t fallback_format);
+
+bool pa_alsa_pcm_is_hw(snd_pcm_t *pcm);
+bool pa_alsa_pcm_is_modem(snd_pcm_t *pcm);
+
+const char* pa_alsa_strerror(int errnum);
+
+#if 0
+bool pa_alsa_may_tsched(bool want);
+#endif
+
+snd_mixer_elem_t *pa_alsa_mixer_find_card(snd_mixer_t *mixer, struct pa_alsa_mixer_id *alsa_id, unsigned int device);
+snd_mixer_elem_t *pa_alsa_mixer_find_pcm(snd_mixer_t *mixer, const char *name, unsigned int device);
+
+snd_mixer_t *pa_alsa_open_mixer(pa_hashmap *mixers, int alsa_card_index, bool probe);
+snd_mixer_t *pa_alsa_open_mixer_by_name(pa_hashmap *mixers, const char *dev, bool probe);
+snd_mixer_t *pa_alsa_open_mixer_for_pcm(pa_hashmap *mixers, snd_pcm_t *pcm, bool probe);
+#if 0
+void pa_alsa_mixer_set_fdlist(pa_hashmap *mixers, snd_mixer_t *mixer, pa_mainloop_api *ml);
+#endif
+void pa_alsa_mixer_free(pa_alsa_mixer *mixer);
+
+typedef struct pa_hdmi_eld pa_hdmi_eld;
+struct pa_hdmi_eld {
+    char monitor_name[17];
+};
+
+int pa_alsa_get_hdmi_eld(snd_hctl_elem_t *elem, pa_hdmi_eld *eld);
+
+#endif
diff --git a/spa/plugins/alsa/acp/array.h b/spa/plugins/alsa/acp/array.h
new file mode 100644
index 0000000..8a976ca
--- /dev/null
+++ b/spa/plugins/alsa/acp/array.h
@@ -0,0 +1,150 @@
+/* ALSA Card Profile
+ *
+ * Copyright © 2018 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef PA_ARRAY_H
+#define PA_ARRAY_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <errno.h>
+#include <string.h>
+
+typedef struct pa_array {
+	void *data;		/**< pointer to array data */
+	size_t size;		/**< length of array in bytes */
+	size_t alloc;		/**< number of allocated memory in \a data */
+	size_t extend;		/**< number of bytes to extend with */
+} pa_array;
+
+#define PW_ARRAY_INIT(extend) ((struct pa_array) { NULL, 0, 0, (extend) })
+
+#define pa_array_get_len_s(a,s)			((a)->size / (s))
+#define pa_array_get_unchecked_s(a,idx,s,t)	(t*)((uint8_t*)(a)->data + (int)((idx)*(s)))
+#define pa_array_check_index_s(a,idx,s)		((idx) < pa_array_get_len_s(a,s))
+
+#define pa_array_get_len(a,t)			pa_array_get_len_s(a,sizeof(t))
+#define pa_array_get_unchecked(a,idx,t)		pa_array_get_unchecked_s(a,idx,sizeof(t),t)
+#define pa_array_check_index(a,idx,t)		pa_array_check_index_s(a,idx,sizeof(t))
+
+#define pa_array_first(a)	((a)->data)
+#define pa_array_end(a)		(void*)((uint8_t*)(a)->data + (int)(a)->size)
+#define pa_array_check(a,p)	((void*)((uint8_t*)p + (int)sizeof(*p)) <= pa_array_end(a))
+
+#define pa_array_for_each(pos, array)					\
+	for (pos = (__typeof__(pos)) pa_array_first(array);		\
+	     pa_array_check(array, pos);				\
+	     (pos)++)
+
+#define pa_array_consume(pos, array)					\
+	while (pos = (__typeof__(pos)) pa_array_first(array) &&	\
+	       pa_array_check(array, pos)
+
+#define pa_array_remove(a,p)						\
+({									\
+	(a)->size -= sizeof(*(p));					\
+	memmove(p, ((uint8_t*)(p) + (int)sizeof(*(p))),			\
+                (uint8_t*)pa_array_end(a) - (uint8_t*)(p));		\
+})
+
+static inline void pa_array_init(pa_array *arr, size_t extend)
+{
+	arr->data = NULL;
+	arr->size = arr->alloc = 0;
+	arr->extend = extend;
+}
+
+static inline void pa_array_clear(pa_array *arr)
+{
+	free(arr->data);
+}
+
+static inline void pa_array_reset(pa_array *arr)
+{
+	arr->size = 0;
+}
+
+static inline int pa_array_ensure_size(pa_array *arr, size_t size)
+{
+	size_t alloc, need;
+
+	alloc = arr->alloc;
+	need = arr->size + size;
+
+	if (alloc < need) {
+		void *data;
+		alloc = alloc > arr->extend ? alloc : arr->extend;
+		while (alloc < need)
+			alloc *= 2;
+		if ((data = realloc(arr->data, alloc)) == NULL)
+			return -errno;
+		arr->data = data;
+		arr->alloc = alloc;
+	}
+	return 0;
+}
+
+static inline void *pa_array_add(pa_array *arr, size_t size)
+{
+	void *p;
+
+	if (pa_array_ensure_size(arr, size) < 0)
+		return NULL;
+
+	p = (void*)((uint8_t*)arr->data + (int)arr->size);
+	arr->size += size;
+
+	return p;
+}
+
+static inline void *pa_array_add_fixed(pa_array *arr, size_t size)
+{
+	void *p;
+	if (arr->alloc < arr->size + size) {
+		errno = ENOSPC;
+		return NULL;
+	}
+	p = ((uint8_t*)arr->data + (int)arr->size);
+	arr->size += size;
+	return p;
+}
+
+#define pa_array_add_ptr(a,p)					\
+	*((void**) pa_array_add(a, sizeof(void*))) = (p)
+
+static inline int pa_array_add_data(pa_array *arr, const void *data, size_t size)
+{
+	void *d;
+	if ((d = pa_array_add(arr, size)) == NULL)
+		return -1;
+	memcpy(d, data, size);
+	return size;
+}
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif /* PA_ARRAY_H */
diff --git a/spa/plugins/alsa/acp/card.h b/spa/plugins/alsa/acp/card.h
new file mode 100644
index 0000000..5a94064
--- /dev/null
+++ b/spa/plugins/alsa/acp/card.h
@@ -0,0 +1,75 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+
+#ifndef PULSE_CARD_H
+#define PULSE_CARD_H
+
+#ifdef __cplusplus
+extern "C" {
+#else
+#include <stdbool.h>
+#endif
+
+#include "compat.h"
+
+typedef struct pa_card pa_card;
+
+struct pa_card {
+	struct acp_card card;
+
+	pa_core *core;
+
+	char *name;
+	char *driver;
+
+	pa_proplist *proplist;
+
+	bool use_ucm;
+	bool soft_mixer;
+	bool auto_profile;
+	bool auto_port;
+	bool ignore_dB;
+	uint32_t rate;
+
+	pa_alsa_ucm_config ucm;
+	pa_alsa_profile_set *profile_set;
+
+	pa_hashmap *ports;
+	pa_hashmap *profiles;
+	pa_hashmap *jacks;
+
+	struct {
+		pa_dynarray ports;
+		pa_dynarray profiles;
+		pa_dynarray devices;
+	} out;
+
+	const struct acp_card_events *events;
+	void *user_data;
+};
+
+bool pa_alsa_device_init_description(pa_proplist *p, pa_card *card);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PULSE_CARD_H */
diff --git a/spa/plugins/alsa/acp/channelmap.h b/spa/plugins/alsa/acp/channelmap.h
new file mode 100644
index 0000000..adb4868
--- /dev/null
+++ b/spa/plugins/alsa/acp/channelmap.h
@@ -0,0 +1,476 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifndef PULSE_CHANNELMAP_H
+#define PULSE_CHANNELMAP_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "spa/utils/defs.h"
+
+#define PA_CHANNELS_MAX	64
+
+#define PA_CHANNEL_MAP_SNPRINT_MAX (PA_CHANNELS_MAX * 32)
+
+typedef enum pa_channel_map_def {
+    PA_CHANNEL_MAP_AIFF,
+    PA_CHANNEL_MAP_ALSA,
+    PA_CHANNEL_MAP_AUX,
+    PA_CHANNEL_MAP_WAVEEX,
+    PA_CHANNEL_MAP_OSS,
+    PA_CHANNEL_MAP_DEF_MAX,
+    PA_CHANNEL_MAP_DEFAULT = PA_CHANNEL_MAP_AIFF
+} pa_channel_map_def_t;
+
+typedef enum pa_channel_position {
+	PA_CHANNEL_POSITION_INVALID = -1,
+	PA_CHANNEL_POSITION_MONO = 0,
+
+	PA_CHANNEL_POSITION_FRONT_LEFT,               /**< Apple, Dolby call this 'Left' */
+	PA_CHANNEL_POSITION_FRONT_RIGHT,              /**< Apple, Dolby call this 'Right' */
+	PA_CHANNEL_POSITION_FRONT_CENTER,             /**< Apple, Dolby call this 'Center' */
+
+/** \cond fulldocs */
+	PA_CHANNEL_POSITION_LEFT = PA_CHANNEL_POSITION_FRONT_LEFT,
+	PA_CHANNEL_POSITION_RIGHT = PA_CHANNEL_POSITION_FRONT_RIGHT,
+	PA_CHANNEL_POSITION_CENTER = PA_CHANNEL_POSITION_FRONT_CENTER,
+/** \endcond */
+
+	PA_CHANNEL_POSITION_REAR_CENTER,              /**< Microsoft calls this 'Back Center', Apple calls this 'Center Surround', Dolby calls this 'Surround Rear Center' */
+	PA_CHANNEL_POSITION_REAR_LEFT,                /**< Microsoft calls this 'Back Left', Apple calls this 'Left Surround' (!), Dolby calls this 'Surround Rear Left'  */
+	PA_CHANNEL_POSITION_REAR_RIGHT,               /**< Microsoft calls this 'Back Right', Apple calls this 'Right Surround' (!), Dolby calls this 'Surround Rear Right'  */
+
+	PA_CHANNEL_POSITION_LFE,                      /**< Microsoft calls this 'Low Frequency', Apple calls this 'LFEScreen' */
+/** \cond fulldocs */
+	PA_CHANNEL_POSITION_SUBWOOFER = PA_CHANNEL_POSITION_LFE,
+/** \endcond */
+
+	PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER,     /**< Apple, Dolby call this 'Left Center' */
+	PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER,    /**< Apple, Dolby call this 'Right Center */
+
+	PA_CHANNEL_POSITION_SIDE_LEFT,                /**< Apple calls this 'Left Surround Direct', Dolby calls this 'Surround Left' (!) */
+	PA_CHANNEL_POSITION_SIDE_RIGHT,               /**< Apple calls this 'Right Surround Direct', Dolby calls this 'Surround Right' (!) */
+	PA_CHANNEL_POSITION_AUX0,
+	PA_CHANNEL_POSITION_AUX1,
+	PA_CHANNEL_POSITION_AUX2,
+	PA_CHANNEL_POSITION_AUX3,
+	PA_CHANNEL_POSITION_AUX4,
+	PA_CHANNEL_POSITION_AUX5,
+	PA_CHANNEL_POSITION_AUX6,
+	PA_CHANNEL_POSITION_AUX7,
+	PA_CHANNEL_POSITION_AUX8,
+	PA_CHANNEL_POSITION_AUX9,
+	PA_CHANNEL_POSITION_AUX10,
+	PA_CHANNEL_POSITION_AUX11,
+	PA_CHANNEL_POSITION_AUX12,
+	PA_CHANNEL_POSITION_AUX13,
+	PA_CHANNEL_POSITION_AUX14,
+	PA_CHANNEL_POSITION_AUX15,
+	PA_CHANNEL_POSITION_AUX16,
+	PA_CHANNEL_POSITION_AUX17,
+	PA_CHANNEL_POSITION_AUX18,
+	PA_CHANNEL_POSITION_AUX19,
+	PA_CHANNEL_POSITION_AUX20,
+	PA_CHANNEL_POSITION_AUX21,
+	PA_CHANNEL_POSITION_AUX22,
+	PA_CHANNEL_POSITION_AUX23,
+	PA_CHANNEL_POSITION_AUX24,
+	PA_CHANNEL_POSITION_AUX25,
+	PA_CHANNEL_POSITION_AUX26,
+	PA_CHANNEL_POSITION_AUX27,
+	PA_CHANNEL_POSITION_AUX28,
+	PA_CHANNEL_POSITION_AUX29,
+	PA_CHANNEL_POSITION_AUX30,
+	PA_CHANNEL_POSITION_AUX31,
+
+	PA_CHANNEL_POSITION_TOP_CENTER,               /**< Apple calls this 'Top Center Surround' */
+
+	PA_CHANNEL_POSITION_TOP_FRONT_LEFT,           /**< Apple calls this 'Vertical Height Left' */
+	PA_CHANNEL_POSITION_TOP_FRONT_RIGHT,          /**< Apple calls this 'Vertical Height Right' */
+	PA_CHANNEL_POSITION_TOP_FRONT_CENTER,         /**< Apple calls this 'Vertical Height Center' */
+
+	PA_CHANNEL_POSITION_TOP_REAR_LEFT,            /**< Microsoft and Apple call this 'Top Back Left' */
+	PA_CHANNEL_POSITION_TOP_REAR_RIGHT,           /**< Microsoft and Apple call this 'Top Back Right' */
+	PA_CHANNEL_POSITION_TOP_REAR_CENTER,          /**< Microsoft and Apple call this 'Top Back Center' */
+
+	PA_CHANNEL_POSITION_MAX
+} pa_channel_position_t;
+
+typedef struct pa_channel_map {
+	uint8_t channels;
+	pa_channel_position_t map[PA_CHANNELS_MAX];
+} pa_channel_map;
+
+static inline int pa_channels_valid(uint8_t channels)
+{
+    return channels > 0 && channels <= PA_CHANNELS_MAX;
+}
+
+static inline int pa_channel_map_valid(const pa_channel_map *map)
+{
+    unsigned c;
+    if (!pa_channels_valid(map->channels))
+        return 0;
+    for (c = 0; c < map->channels; c++)
+        if (map->map[c] < 0 || map->map[c] >= PA_CHANNEL_POSITION_MAX)
+            return 0;
+    return 1;
+}
+static inline pa_channel_map* pa_channel_map_init(pa_channel_map *m)
+{
+    unsigned c;
+    m->channels = 0;
+    for (c = 0; c < PA_CHANNELS_MAX; c++)
+        m->map[c] = PA_CHANNEL_POSITION_INVALID;
+    return m;
+}
+
+static inline pa_channel_map* pa_channel_map_init_auto(pa_channel_map *m, unsigned channels, pa_channel_map_def_t def)
+{
+	unsigned i;
+
+	pa_assert(m);
+	pa_assert(pa_channels_valid(channels));
+	pa_assert(def < PA_CHANNEL_MAP_DEF_MAX);
+
+	pa_channel_map_init(m);
+
+	m->channels = (uint8_t) channels;
+
+	switch (def) {
+	case PA_CHANNEL_MAP_ALSA:
+            switch (channels) {
+                case 1:
+                    m->map[0] = PA_CHANNEL_POSITION_MONO;
+                    return m;
+                case 8:
+                    m->map[6] = PA_CHANNEL_POSITION_SIDE_LEFT;
+                    m->map[7] = PA_CHANNEL_POSITION_SIDE_RIGHT;
+                    SPA_FALLTHROUGH;
+                case 6:
+                    m->map[5] = PA_CHANNEL_POSITION_LFE;
+                    SPA_FALLTHROUGH;
+                case 5:
+                    m->map[4] = PA_CHANNEL_POSITION_FRONT_CENTER;
+                    SPA_FALLTHROUGH;
+                case 4:
+                    m->map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
+                    m->map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
+                    SPA_FALLTHROUGH;
+                case 2:
+                    m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
+                    m->map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
+                    return m;
+                default:
+                    return NULL;
+            }
+	case PA_CHANNEL_MAP_AUX:
+	    for (i = 0; i < channels; i++)
+		m->map[i] = PA_CHANNEL_POSITION_AUX0 + (i & 31);
+	    return m;
+	default:
+	    break;
+	}
+	return NULL;
+}
+
+static inline pa_channel_map* pa_channel_map_init_extend(pa_channel_map *m,
+		unsigned channels, pa_channel_map_def_t def)
+{
+	pa_channel_map *r;
+	if ((r = pa_channel_map_init_auto(m, channels, def)) != NULL)
+		return r;
+	return pa_channel_map_init_auto(m, channels, PA_CHANNEL_MAP_AUX);
+}
+
+typedef uint64_t pa_channel_position_mask_t;
+
+#define PA_CHANNEL_POSITION_MASK(f) ((pa_channel_position_mask_t) (1ULL << (f)))
+
+#define PA_CHANNEL_POSITION_MASK_LEFT                                   \
+	(PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_LEFT)           \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_LEFT)          \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER) \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_SIDE_LEFT)          \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_LEFT)     \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_LEFT))     \
+
+#define PA_CHANNEL_POSITION_MASK_RIGHT                                  \
+	(PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_RIGHT)          \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_RIGHT)         \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER) \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_SIDE_RIGHT)         \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_RIGHT)    \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_RIGHT))
+
+#define PA_CHANNEL_POSITION_MASK_CENTER                                 \
+	(PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_CENTER)         \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_CENTER)        \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_CENTER)         \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_CENTER)   \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_CENTER))
+
+#define PA_CHANNEL_POSITION_MASK_FRONT                                  \
+	(PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_LEFT)           \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_RIGHT)        \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_CENTER)       \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER) \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER) \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_LEFT)     \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_RIGHT)    \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_CENTER))
+
+#define PA_CHANNEL_POSITION_MASK_REAR                                   \
+	(PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_LEFT)            \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_RIGHT)         \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_CENTER)        \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_LEFT)      \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_RIGHT)     \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_CENTER))
+
+#define PA_CHANNEL_POSITION_MASK_LFE                                    \
+	PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_LFE)
+
+#define PA_CHANNEL_POSITION_MASK_HFE                                    \
+	(PA_CHANNEL_POSITION_MASK_REAR | PA_CHANNEL_POSITION_MASK_FRONT     \
+	| PA_CHANNEL_POSITION_MASK_LEFT | PA_CHANNEL_POSITION_MASK_RIGHT   \
+	| PA_CHANNEL_POSITION_MASK_CENTER)
+
+#define PA_CHANNEL_POSITION_MASK_SIDE_OR_TOP_CENTER                     \
+	(PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_SIDE_LEFT)            \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_SIDE_RIGHT)         \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_CENTER))
+
+#define PA_CHANNEL_POSITION_MASK_TOP                                    \
+	(PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_CENTER)           \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_LEFT)     \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_RIGHT)    \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_CENTER)   \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_LEFT)      \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_RIGHT)     \
+	| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_CENTER))
+
+#define PA_CHANNEL_POSITION_MASK_ALL            \
+	((pa_channel_position_mask_t) (PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_MAX)-1))
+
+static const char *const pa_position_table[PA_CHANNEL_POSITION_MAX] = {
+	[PA_CHANNEL_POSITION_MONO] = "mono",
+	[PA_CHANNEL_POSITION_FRONT_CENTER] = "front-center",
+	[PA_CHANNEL_POSITION_FRONT_LEFT] = "front-left",
+	[PA_CHANNEL_POSITION_FRONT_RIGHT] = "front-right",
+	[PA_CHANNEL_POSITION_REAR_CENTER] = "rear-center",
+	[PA_CHANNEL_POSITION_REAR_LEFT] = "rear-left",
+	[PA_CHANNEL_POSITION_REAR_RIGHT] = "rear-right",
+	[PA_CHANNEL_POSITION_LFE] = "lfe",
+	[PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER] = "front-left-of-center",
+	[PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER] = "front-right-of-center",
+	[PA_CHANNEL_POSITION_SIDE_LEFT] = "side-left",
+	[PA_CHANNEL_POSITION_SIDE_RIGHT] = "side-right",
+	[PA_CHANNEL_POSITION_AUX0] = "aux0",
+	[PA_CHANNEL_POSITION_AUX1] = "aux1",
+	[PA_CHANNEL_POSITION_AUX2] = "aux2",
+	[PA_CHANNEL_POSITION_AUX3] = "aux3",
+	[PA_CHANNEL_POSITION_AUX4] = "aux4",
+	[PA_CHANNEL_POSITION_AUX5] = "aux5",
+	[PA_CHANNEL_POSITION_AUX6] = "aux6",
+	[PA_CHANNEL_POSITION_AUX7] = "aux7",
+	[PA_CHANNEL_POSITION_AUX8] = "aux8",
+	[PA_CHANNEL_POSITION_AUX9] = "aux9",
+	[PA_CHANNEL_POSITION_AUX10] = "aux10",
+	[PA_CHANNEL_POSITION_AUX11] = "aux11",
+	[PA_CHANNEL_POSITION_AUX12] = "aux12",
+	[PA_CHANNEL_POSITION_AUX13] = "aux13",
+	[PA_CHANNEL_POSITION_AUX14] = "aux14",
+	[PA_CHANNEL_POSITION_AUX15] = "aux15",
+	[PA_CHANNEL_POSITION_AUX16] = "aux16",
+	[PA_CHANNEL_POSITION_AUX17] = "aux17",
+	[PA_CHANNEL_POSITION_AUX18] = "aux18",
+	[PA_CHANNEL_POSITION_AUX19] = "aux19",
+	[PA_CHANNEL_POSITION_AUX20] = "aux20",
+	[PA_CHANNEL_POSITION_AUX21] = "aux21",
+	[PA_CHANNEL_POSITION_AUX22] = "aux22",
+	[PA_CHANNEL_POSITION_AUX23] = "aux23",
+	[PA_CHANNEL_POSITION_AUX24] = "aux24",
+	[PA_CHANNEL_POSITION_AUX25] = "aux25",
+	[PA_CHANNEL_POSITION_AUX26] = "aux26",
+	[PA_CHANNEL_POSITION_AUX27] = "aux27",
+	[PA_CHANNEL_POSITION_AUX28] = "aux28",
+	[PA_CHANNEL_POSITION_AUX29] = "aux29",
+	[PA_CHANNEL_POSITION_AUX30] = "aux30",
+	[PA_CHANNEL_POSITION_AUX31] = "aux31",
+
+	[PA_CHANNEL_POSITION_TOP_CENTER] = "top-center",
+	[PA_CHANNEL_POSITION_TOP_FRONT_CENTER] = "top-front-center",
+	[PA_CHANNEL_POSITION_TOP_FRONT_LEFT] = "top-front-left",
+	[PA_CHANNEL_POSITION_TOP_FRONT_RIGHT] = "top-front-right",
+	[PA_CHANNEL_POSITION_TOP_REAR_CENTER] = "top-rear-center",
+	[PA_CHANNEL_POSITION_TOP_REAR_LEFT] = "top-rear-left",
+	[PA_CHANNEL_POSITION_TOP_REAR_RIGHT] = "top-rear-right"
+};
+
+static inline pa_channel_position_t pa_channel_position_from_string(const char *p)
+{
+    pa_channel_position_t i;
+    /* Some special aliases */
+    if (pa_streq(p, "left"))
+        return PA_CHANNEL_POSITION_LEFT;
+    else if (pa_streq(p, "right"))
+        return PA_CHANNEL_POSITION_RIGHT;
+    else if (pa_streq(p, "center"))
+        return PA_CHANNEL_POSITION_CENTER;
+    else if (pa_streq(p, "subwoofer"))
+        return PA_CHANNEL_POSITION_SUBWOOFER;
+    for (i = 0; i < PA_CHANNEL_POSITION_MAX; i++)
+        if (pa_streq(p, pa_position_table[i]))
+            return i;
+    return PA_CHANNEL_POSITION_INVALID;
+}
+
+static inline pa_channel_map *pa_channel_map_parse(pa_channel_map *rmap, const char *s)
+{
+    const char *state;
+    pa_channel_map map;
+    char *p;
+    pa_channel_map_init(&map);
+    if (pa_streq(s, "stereo")) {
+        map.channels = 2;
+        map.map[0] = PA_CHANNEL_POSITION_LEFT;
+        map.map[1] = PA_CHANNEL_POSITION_RIGHT;
+        goto finish;
+    } else if (pa_streq(s, "surround-21")) {
+        map.channels = 3;
+        map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
+        map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
+        map.map[2] = PA_CHANNEL_POSITION_LFE;
+        goto finish;
+    } else if (pa_streq(s, "surround-40")) {
+        map.channels = 4;
+        map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
+        map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
+        map.map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
+        map.map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
+        goto finish;
+    } else if (pa_streq(s, "surround-41")) {
+        map.channels = 5;
+        map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
+        map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
+        map.map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
+        map.map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
+        map.map[4] = PA_CHANNEL_POSITION_LFE;
+        goto finish;
+    } else if (pa_streq(s, "surround-50")) {
+        map.channels = 5;
+        map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
+        map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
+        map.map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
+        map.map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
+        map.map[4] = PA_CHANNEL_POSITION_FRONT_CENTER;
+        goto finish;
+    } else if (pa_streq(s, "surround-51")) {
+        map.channels = 6;
+        map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
+        map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
+        map.map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
+        map.map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
+        map.map[4] = PA_CHANNEL_POSITION_FRONT_CENTER;
+        map.map[5] = PA_CHANNEL_POSITION_LFE;
+        goto finish;
+    } else if (pa_streq(s, "surround-71")) {
+        map.channels = 8;
+        map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
+        map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
+        map.map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
+        map.map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
+        map.map[4] = PA_CHANNEL_POSITION_FRONT_CENTER;
+        map.map[5] = PA_CHANNEL_POSITION_LFE;
+        map.map[6] = PA_CHANNEL_POSITION_SIDE_LEFT;
+        map.map[7] = PA_CHANNEL_POSITION_SIDE_RIGHT;
+        goto finish;
+    }
+    state = NULL;
+    map.channels = 0;
+    while ((p = pa_split(s, ",", &state))) {
+        pa_channel_position_t f;
+
+        if (map.channels >= PA_CHANNELS_MAX) {
+            pa_xfree(p);
+            return NULL;
+        }
+        if ((f = pa_channel_position_from_string(p)) == PA_CHANNEL_POSITION_INVALID) {
+            pa_xfree(p);
+            return NULL;
+        }
+        map.map[map.channels++] = f;
+        pa_xfree(p);
+    }
+finish:
+    if (!pa_channel_map_valid(&map))
+        return NULL;
+    *rmap = map;
+    return rmap;
+}
+
+static inline const char* pa_channel_position_to_string(pa_channel_position_t pos) {
+
+    if (pos < 0 || pos >= PA_CHANNEL_POSITION_MAX)
+        return NULL;
+    return pa_position_table[pos];
+}
+
+static inline int pa_channel_map_equal(const pa_channel_map *a, const pa_channel_map *b)
+{
+    unsigned c;
+    if (PA_UNLIKELY(a == b))
+        return 1;
+    if (a->channels != b->channels)
+        return 0;
+    for (c = 0; c < a->channels; c++)
+        if (a->map[c] != b->map[c])
+            return 0;
+    return 1;
+}
+
+static inline char* pa_channel_map_snprint(char *s, size_t l, const pa_channel_map *map) {
+    unsigned channel;
+    bool first = true;
+    char *e;
+    if (!pa_channel_map_valid(map)) {
+        pa_snprintf(s, l, "%s", _("(invalid)"));
+        return s;
+    }
+    *(e = s) = 0;
+    for (channel = 0; channel < map->channels && l > 1; channel++) {
+        l -= pa_snprintf(e, l, "%s%s",
+                      first ? "" : ",",
+                      pa_channel_position_to_string(map->map[channel]));
+        e = strchr(e, 0);
+        first = false;
+    }
+
+    return s;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PULSE_CHANNELMAP_H */
diff --git a/spa/plugins/alsa/acp/compat.c b/spa/plugins/alsa/acp/compat.c
new file mode 100644
index 0000000..7703444
--- /dev/null
+++ b/spa/plugins/alsa/acp/compat.c
@@ -0,0 +1,210 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2009 Lennart Poettering
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "compat.h"
+#include "device-port.h"
+#include "alsa-mixer.h"
+
+static const char *port_types[] = {
+	[PA_DEVICE_PORT_TYPE_UNKNOWN] = "unknown",
+	[PA_DEVICE_PORT_TYPE_AUX] = "aux",
+	[PA_DEVICE_PORT_TYPE_SPEAKER] = "speaker",
+	[PA_DEVICE_PORT_TYPE_HEADPHONES] = "headphones",
+	[PA_DEVICE_PORT_TYPE_LINE] = "line",
+	[PA_DEVICE_PORT_TYPE_MIC] = "mic",
+	[PA_DEVICE_PORT_TYPE_HEADSET] = "headset",
+	[PA_DEVICE_PORT_TYPE_HANDSET] = "handset",
+	[PA_DEVICE_PORT_TYPE_EARPIECE] = "earpiece",
+	[PA_DEVICE_PORT_TYPE_SPDIF] = "spdif",
+	[PA_DEVICE_PORT_TYPE_HDMI] = "hdmi",
+	[PA_DEVICE_PORT_TYPE_TV] = "tv",
+	[PA_DEVICE_PORT_TYPE_RADIO] = "radio",
+	[PA_DEVICE_PORT_TYPE_VIDEO] = "video",
+	[PA_DEVICE_PORT_TYPE_USB] = "usb",
+	[PA_DEVICE_PORT_TYPE_BLUETOOTH] = "bluetooth",
+	[PA_DEVICE_PORT_TYPE_PORTABLE] = "portable",
+	[PA_DEVICE_PORT_TYPE_HANDSFREE] = "handsfree",
+	[PA_DEVICE_PORT_TYPE_CAR] = "car",
+	[PA_DEVICE_PORT_TYPE_HIFI] = "hifi",
+	[PA_DEVICE_PORT_TYPE_PHONE] = "phone",
+	[PA_DEVICE_PORT_TYPE_NETWORK] = "network",
+	[PA_DEVICE_PORT_TYPE_ANALOG] = "analog",
+};
+
+static const char *str_port_type(pa_device_port_type_t type)
+{
+	int idx = (type < PA_ELEMENTSOF(port_types)) ? type : 0;
+	return port_types[idx];
+}
+
+pa_device_port_new_data *pa_device_port_new_data_init(pa_device_port_new_data *data)
+{
+	pa_assert(data);
+	pa_zero(*data);
+	data->type = PA_DEVICE_PORT_TYPE_UNKNOWN;
+	data->available = PA_AVAILABLE_UNKNOWN;
+	return data;
+}
+
+void pa_device_port_new_data_set_name(pa_device_port_new_data *data, const char *name)
+{
+	pa_assert(data);
+	pa_xfree(data->name);
+	data->name = pa_xstrdup(name);
+}
+
+void pa_device_port_new_data_set_description(pa_device_port_new_data *data, const char *description)
+{
+	pa_assert(data);
+	pa_xfree(data->description);
+	data->description = pa_xstrdup(description);
+}
+
+void pa_device_port_new_data_set_available(pa_device_port_new_data *data, pa_available_t available)
+{
+	pa_assert(data);
+	data->available = available;
+}
+
+void pa_device_port_new_data_set_availability_group(pa_device_port_new_data *data, const char *group)
+{
+	pa_assert(data);
+	pa_xfree(data->availability_group);
+	data->availability_group = pa_xstrdup(group);
+}
+
+void pa_device_port_new_data_set_direction(pa_device_port_new_data *data, pa_direction_t direction)
+{
+	pa_assert(data);
+	data->direction = direction;
+}
+
+void pa_device_port_new_data_set_type(pa_device_port_new_data *data, pa_device_port_type_t type)
+{
+	pa_assert(data);
+	data->type = type;
+}
+
+void pa_device_port_new_data_done(pa_device_port_new_data *data)
+{
+	pa_assert(data);
+	pa_xfree(data->name);
+	pa_xfree(data->description);
+	pa_xfree(data->availability_group);
+}
+
+pa_device_port *pa_device_port_new(pa_core *c, pa_device_port_new_data *data, size_t extra)
+{
+	pa_device_port *p;
+
+	pa_assert(data);
+	pa_assert(data->name);
+	pa_assert(data->description);
+	pa_assert(data->direction == PA_DIRECTION_OUTPUT || data->direction == PA_DIRECTION_INPUT);
+
+	p = calloc(1, sizeof(pa_device_port) + extra);
+
+	p->port.name = p->name = data->name;
+	data->name = NULL;
+	p->port.description = p->description = data->description;
+	data->description = NULL;
+	p->priority = p->port.priority = 0;
+	p->available = data->available;
+	p->port.available = (enum acp_available) data->available;
+	p->availability_group = data->availability_group;
+	data->availability_group = NULL;
+	p->profiles = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
+	p->direction = data->direction;
+	p->port.direction = data->direction == PA_DIRECTION_OUTPUT ?
+		ACP_DIRECTION_PLAYBACK : ACP_DIRECTION_CAPTURE;
+	p->type = data->type;
+
+	p->proplist = pa_proplist_new();
+	pa_proplist_sets(p->proplist, ACP_KEY_PORT_TYPE, str_port_type(data->type));
+	if (p->availability_group)
+		pa_proplist_sets(p->proplist, ACP_KEY_PORT_AVAILABILITY_GROUP, p->availability_group);
+
+	p->user_data = (void*)((uint8_t*)p + sizeof(pa_device_port));
+
+	return p;
+}
+
+void pa_device_port_free(pa_device_port *port)
+{
+	pa_xfree(port->name);
+	pa_xfree(port->description);
+	pa_xfree(port->availability_group);
+	pa_hashmap_free(port->profiles);
+	pa_proplist_free(port->proplist);
+	if (port->impl_free)
+	        port->impl_free (port);
+	free(port);
+}
+
+void pa_device_port_set_available(pa_device_port *p, pa_available_t status)
+{
+	pa_available_t old = p->available;
+
+	if (old == status)
+		return;
+	p->available = status;
+	p->port.available = (enum acp_available) status;
+
+	if (p->card && p->card->events && p->card->events->port_available)
+		p->card->events->port_available(p->card->user_data, p->port.index,
+				(enum acp_available)old, p->port.available);
+}
+
+bool pa_alsa_device_init_description(pa_proplist *p, pa_card *card) {
+    const char *s, *d = NULL, *k;
+    pa_assert(p);
+
+    if (pa_proplist_contains(p, PA_PROP_DEVICE_DESCRIPTION))
+        return true;
+
+    if (card)
+        if ((s = pa_proplist_gets(card->proplist, PA_PROP_DEVICE_DESCRIPTION)))
+            d = s;
+
+    if (!d)
+        if ((s = pa_proplist_gets(p, PA_PROP_DEVICE_FORM_FACTOR)))
+            if (pa_streq(s, "internal"))
+                d = _("Built-in Audio");
+
+    if (!d)
+        if ((s = pa_proplist_gets(p, PA_PROP_DEVICE_CLASS)))
+            if (pa_streq(s, "modem"))
+                d = _("Modem");
+
+    if (!d)
+        d = pa_proplist_gets(p, PA_PROP_DEVICE_PRODUCT_NAME);
+
+    if (!d)
+        return false;
+
+    k = pa_proplist_gets(p, PA_PROP_DEVICE_PROFILE_DESCRIPTION);
+
+    if (d && k)
+        pa_proplist_setf(p, PA_PROP_DEVICE_DESCRIPTION, "%s %s", d, k);
+    else if (d)
+        pa_proplist_sets(p, PA_PROP_DEVICE_DESCRIPTION, d);
+
+    return true;
+}
diff --git a/spa/plugins/alsa/acp/compat.h b/spa/plugins/alsa/acp/compat.h
new file mode 100644
index 0000000..46ef1fd
--- /dev/null
+++ b/spa/plugins/alsa/acp/compat.h
@@ -0,0 +1,656 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+
+#ifndef PULSE_COMPAT_H
+#define PULSE_COMPAT_H
+
+#ifdef __cplusplus
+extern "C" {
+#else
+#include <stdbool.h>
+#endif
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <math.h>
+
+#include <spa/utils/string.h>
+
+typedef struct pa_core pa_core;
+
+typedef void *(*pa_copy_func_t)(const void *p);
+typedef void (*pa_free_cb_t)(void *p);
+
+#ifdef __GNUC__
+#define PA_LIKELY(x) (__builtin_expect(!!(x),1))
+#define PA_UNLIKELY(x) (__builtin_expect(!!(x),0))
+#define PA_PRINTF_FUNC(fmt, arg1) __attribute__((format(printf, fmt, arg1)))
+#else
+#define PA_LIKELY(x) (x)
+#define PA_UNLIKELY(x) (x)
+#define PA_PRINTF_FUNC(fmt, arg1)
+#endif
+
+#define PA_MIN(a,b)                    \
+({                                     \
+        __typeof__(a) _a = (a);        \
+        __typeof__(b) _b = (b);        \
+        PA_LIKELY(_a < _b) ? _a : _b;  \
+})
+#define PA_MAX(a,b)                    \
+({                                     \
+        __typeof__(a) _a = (a);        \
+        __typeof__(b) _b = (b);        \
+        PA_LIKELY(_a > _b) ? _a : _b;  \
+})
+#define PA_CLAMP_UNLIKELY(v,low,high)                 \
+({                                                    \
+        __typeof__(v) _v = (v);                       \
+        __typeof__(low) _low = (low);                 \
+        __typeof__(high) _high = (high);              \
+        PA_MIN(PA_MAX(_v, _low), _high);              \
+})
+
+#define PA_PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
+#define PA_UINT_TO_PTR(u) ((void*) ((uintptr_t) (u)))
+
+#include "array.h"
+#include "llist.h"
+#include "hashmap.h"
+#include "dynarray.h"
+#include "idxset.h"
+#include "proplist.h"
+
+typedef enum pa_direction {
+	PA_DIRECTION_OUTPUT = 0x0001U,  /**< Output direction */
+	PA_DIRECTION_INPUT = 0x0002U    /**< Input direction */
+} pa_direction_t;
+
+/* This enum replaces pa_port_available_t (defined in pulse/def.h) for
+ * internal use, so make sure both enum types stay in sync. */
+typedef enum pa_available {
+	PA_AVAILABLE_UNKNOWN = 0,
+	PA_AVAILABLE_NO = 1,
+	PA_AVAILABLE_YES = 2,
+} pa_available_t;
+
+#define PA_RATE_MAX (48000U*8U)
+
+typedef enum pa_sample_format {
+	PA_SAMPLE_U8,		/**< Unsigned 8 Bit PCM */
+	PA_SAMPLE_ALAW,		/**< 8 Bit a-Law */
+	PA_SAMPLE_ULAW,		/**< 8 Bit mu-Law */
+	PA_SAMPLE_S16LE,	/**< Signed 16 Bit PCM, little endian (PC) */
+	PA_SAMPLE_S16BE,	/**< Signed 16 Bit PCM, big endian */
+	PA_SAMPLE_FLOAT32LE,	/**< 32 Bit IEEE floating point, little endian (PC), range -1.0 to 1.0 */
+	PA_SAMPLE_FLOAT32BE,	/**< 32 Bit IEEE floating point, big endian, range -1.0 to 1.0 */
+	PA_SAMPLE_S32LE,	/**< Signed 32 Bit PCM, little endian (PC) */
+	PA_SAMPLE_S32BE,	/**< Signed 32 Bit PCM, big endian */
+	PA_SAMPLE_S24LE,	/**< Signed 24 Bit PCM packed, little endian (PC). \since 0.9.15 */
+	PA_SAMPLE_S24BE,	/**< Signed 24 Bit PCM packed, big endian. \since 0.9.15 */
+	PA_SAMPLE_S24_32LE,	/**< Signed 24 Bit PCM in LSB of 32 Bit words, little endian (PC). \since 0.9.15 */
+	PA_SAMPLE_S24_32BE,	/**< Signed 24 Bit PCM in LSB of 32 Bit words, big endian. \since 0.9.15 */
+	PA_SAMPLE_MAX,		/**< Upper limit of valid sample types */
+	PA_SAMPLE_INVALID = -1	/**< An invalid value */
+} pa_sample_format_t;
+
+static inline int pa_sample_format_valid(unsigned format)
+{
+	return format < PA_SAMPLE_MAX;
+}
+
+#ifdef WORDS_BIGENDIAN
+#define PA_SAMPLE_S16NE PA_SAMPLE_S16BE
+#define PA_SAMPLE_FLOAT32NE PA_SAMPLE_FLOAT32BE
+#define PA_SAMPLE_S32NE PA_SAMPLE_S32BE
+#define PA_SAMPLE_S24NE PA_SAMPLE_S24BE
+#define PA_SAMPLE_S24_32NE PA_SAMPLE_S24_32BE
+#define PA_SAMPLE_S16RE PA_SAMPLE_S16LE
+#define PA_SAMPLE_FLOAT32RE PA_SAMPLE_FLOAT32LE
+#define PA_SAMPLE_S32RE PA_SAMPLE_S32LE
+#define PA_SAMPLE_S24RE PA_SAMPLE_S24LE
+#define PA_SAMPLE_S24_32RE PA_SAMPLE_S24_32LE
+#else
+#define PA_SAMPLE_S16NE PA_SAMPLE_S16LE
+#define PA_SAMPLE_FLOAT32NE PA_SAMPLE_FLOAT32LE
+#define PA_SAMPLE_S32NE PA_SAMPLE_S32LE
+#define PA_SAMPLE_S24NE PA_SAMPLE_S24LE
+#define PA_SAMPLE_S24_32NE PA_SAMPLE_S24_32LE
+#define PA_SAMPLE_S16RE PA_SAMPLE_S16BE
+#define PA_SAMPLE_FLOAT32RE PA_SAMPLE_FLOAT32BE
+#define PA_SAMPLE_S32RE PA_SAMPLE_S32BE
+#define PA_SAMPLE_S24RE PA_SAMPLE_S24BE
+#define PA_SAMPLE_S24_32RE PA_SAMPLE_S24_32BE
+#endif
+
+static const size_t pa_sample_size_table[] = {
+    [PA_SAMPLE_U8] = 1,
+    [PA_SAMPLE_ULAW] = 1,
+    [PA_SAMPLE_ALAW] = 1,
+    [PA_SAMPLE_S16LE] = 2,
+    [PA_SAMPLE_S16BE] = 2,
+    [PA_SAMPLE_FLOAT32LE] = 4,
+    [PA_SAMPLE_FLOAT32BE] = 4,
+    [PA_SAMPLE_S32LE] = 4,
+    [PA_SAMPLE_S32BE] = 4,
+    [PA_SAMPLE_S24LE] = 3,
+    [PA_SAMPLE_S24BE] = 3,
+    [PA_SAMPLE_S24_32LE] = 4,
+    [PA_SAMPLE_S24_32BE] = 4
+};
+
+static inline const char *pa_sample_format_to_string(pa_sample_format_t f)
+{
+	static const char* const table[]= {
+		[PA_SAMPLE_U8] = "u8",
+		[PA_SAMPLE_ALAW] = "aLaw",
+		[PA_SAMPLE_ULAW] = "uLaw",
+		[PA_SAMPLE_S16LE] = "s16le",
+		[PA_SAMPLE_S16BE] = "s16be",
+		[PA_SAMPLE_FLOAT32LE] = "float32le",
+		[PA_SAMPLE_FLOAT32BE] = "float32be",
+		[PA_SAMPLE_S32LE] = "s32le",
+		[PA_SAMPLE_S32BE] = "s32be",
+		[PA_SAMPLE_S24LE] = "s24le",
+		[PA_SAMPLE_S24BE] = "s24be",
+		[PA_SAMPLE_S24_32LE] = "s24-32le",
+		[PA_SAMPLE_S24_32BE] = "s24-32be",
+	};
+
+	if (!pa_sample_format_valid(f))
+	        return NULL;
+	return table[f];
+}
+
+typedef struct pa_sample_spec {
+	pa_sample_format_t format;
+	uint32_t rate;
+	uint8_t channels;
+} pa_sample_spec;
+
+typedef uint64_t pa_usec_t;
+#define PA_MSEC_PER_SEC ((pa_usec_t) 1000ULL)
+#define PA_USEC_PER_SEC ((pa_usec_t) 1000000ULL)
+#define PA_USEC_PER_MSEC ((pa_usec_t) 1000ULL)
+
+static inline size_t pa_usec_to_bytes(pa_usec_t t, const pa_sample_spec *spec) {
+    return (size_t) (((t * spec->rate) / PA_USEC_PER_SEC)) *
+	    (pa_sample_size_table[spec->format] * spec->channels);
+}
+
+static inline int pa_sample_rate_valid(uint32_t rate) {
+    return rate > 0 && rate <= PA_RATE_MAX * 101 / 100;
+}
+
+static inline size_t pa_frame_size(const pa_sample_spec *spec) {
+    return pa_sample_size_table[spec->format] * spec->channels;
+}
+
+typedef enum pa_log_level {
+	PA_LOG_ERROR  = 0,    /* Error messages */
+	PA_LOG_WARN   = 1,    /* Warning messages */
+	PA_LOG_NOTICE = 2,    /* Notice messages */
+	PA_LOG_INFO   = 3,    /* Info messages */
+	PA_LOG_DEBUG  = 4,    /* Debug messages */
+	PA_LOG_LEVEL_MAX
+} pa_log_level_t;
+
+extern int _acp_log_level;
+extern acp_log_func _acp_log_func;
+extern void * _acp_log_data;
+
+#define pa_log_level_enabled(lev) (_acp_log_level >= (int)(lev))
+
+#define pa_log_levelv_meta(lev,f,l,func,fmt,ap)                         \
+({                                                                      \
+        if (pa_log_level_enabled (lev) && _acp_log_func)                \
+                _acp_log_func(_acp_log_data,lev,f,l,func,fmt,ap);			\
+})
+
+static inline PA_PRINTF_FUNC(5, 6) void pa_log_level_meta(enum pa_log_level level,
+           const char *file, int line, const char *func,
+           const char *fmt, ...)
+{
+	va_list args;
+	va_start(args,fmt);
+	pa_log_levelv_meta(level,file,line,func,fmt,args);
+	va_end(args);
+}
+
+#define pa_logl(lev,fmt,...)	pa_log_level_meta(lev,__FILE__, __LINE__, __func__, fmt, ##__VA_ARGS__)
+#define pa_log_error(fmt,...)	pa_logl(PA_LOG_ERROR, fmt, ##__VA_ARGS__)
+#define pa_log_warn(fmt,...)	pa_logl(PA_LOG_WARN, fmt, ##__VA_ARGS__)
+#define pa_log_notice(fmt,...)	pa_logl(PA_LOG_NOTICE, fmt, ##__VA_ARGS__)
+#define pa_log_info(fmt,...)	pa_logl(PA_LOG_INFO, fmt, ##__VA_ARGS__)
+#define pa_log_debug(fmt,...)	pa_logl(PA_LOG_DEBUG, fmt, ##__VA_ARGS__)
+#define pa_log			pa_log_error
+
+#define pa_assert_se(expr)                                              \
+        do {                                                            \
+                if (PA_UNLIKELY(!(expr))) {                             \
+                        fprintf(stderr, "'%s' failed at %s:%u %s()\n",  \
+                                #expr , __FILE__, __LINE__, __func__);  \
+                        abort();                                        \
+                }                                                       \
+        } while (false)
+
+#define pa_assert(expr)                                                 \
+        do {                                                            \
+                if (PA_UNLIKELY(!(expr))) {                             \
+                        fprintf(stderr, "'%s' failed at %s:%u %s()\n",  \
+                                #expr , __FILE__, __LINE__, __func__);  \
+                        abort();                                        \
+                }                                                       \
+        } while (false)
+
+#define pa_assert_not_reached()                                                \
+        do {                                                                    \
+                fprintf(stderr, "Code should not be reached at %s:%u %s()\n",   \
+                                __FILE__, __LINE__, __func__);                  \
+                abort();                                                        \
+        } while (false)
+
+
+#define pa_memzero(x,l) (memset((x), 0, (l)))
+#define pa_zero(x)      (pa_memzero(&(x), sizeof(x)))
+
+#define PA_ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))
+
+#define pa_streq(a,b) (!strcmp((a),(b)))
+#define pa_strneq(a,b,n) (!strncmp((a),(b),(n)))
+#define pa_strnull(s)	((s) ? (s) : "null")
+#define pa_startswith(s,pfx)	(strstr(s, pfx) == s)
+
+PA_PRINTF_FUNC(3, 0)
+static inline size_t pa_vsnprintf(char *str, size_t size, const char *format, va_list ap)
+{
+	int ret;
+
+	pa_assert(str);
+	pa_assert(size > 0);
+	pa_assert(format);
+
+	ret = vsnprintf(str, size, format, ap);
+
+	str[size-1] = 0;
+
+	if (ret < 0)
+		return strlen(str);
+
+	if ((size_t) ret > size-1)
+		return size-1;
+
+	return (size_t) ret;
+}
+
+PA_PRINTF_FUNC(3, 4)
+static inline size_t pa_snprintf(char *str, size_t size, const char *format, ...)
+{
+	size_t ret;
+	va_list ap;
+
+	pa_assert(str);
+	pa_assert(size > 0);
+	pa_assert(format);
+
+	va_start(ap, format);
+	ret = pa_vsnprintf(str, size, format, ap);
+	va_end(ap);
+
+	return ret;
+}
+
+#define pa_xstrdup(s)		((s) != NULL ? strdup(s) : NULL)
+#define pa_xstrndup(s,n)	((s) != NULL ? strndup(s,n) : NULL)
+#define pa_xfree		free
+#define pa_xmalloc		malloc
+#define pa_xnew0(t,n)		calloc(n, sizeof(t))
+#define pa_xnew(t,n)		pa_xnew0(t,n)
+#define pa_xrealloc		realloc
+#define pa_xrenew(t,p,n)	((t*) realloc(p, (n)*sizeof(t)))
+
+static inline void* pa_xmemdup(const void *p, size_t l) {
+	return memcpy(malloc(l), p, l);
+
+}
+#define pa_xnewdup(t,p,n) ((t*) pa_xmemdup((p), (n)*sizeof(t)))
+
+static inline void pa_xfreev(void**a)
+{
+	int i;
+	for (i = 0; a && a[i]; i++)
+                free(a[i]);
+        free(a);
+}
+static inline void pa_xstrfreev(char **a) {
+    pa_xfreev((void**)a);
+}
+
+
+#define pa_cstrerror	strerror
+
+#define PA_PATH_SEP		"/"
+#define PA_PATH_SEP_CHAR	'/'
+
+#define PA_WHITESPACE "\n\r \t"
+
+static PA_PRINTF_FUNC(1,2) inline char *pa_sprintf_malloc(const char *fmt, ...)
+{
+	char *res;
+	va_list args;
+	va_start(args, fmt);
+	if (vasprintf(&res, fmt, args) < 0)
+		res = NULL;
+	va_end(args);
+	return res;
+}
+
+#define pa_fopen_cloexec(f,m)	fopen(f,m"e")
+
+static inline char *pa_path_get_filename(const char *p)
+{
+    char *fn;
+    if (!p)
+        return NULL;
+    if ((fn = strrchr(p, PA_PATH_SEP_CHAR)))
+        return fn+1;
+    return (char*) p;
+}
+
+static inline bool pa_is_path_absolute(const char *fn)
+{
+    return *fn == PA_PATH_SEP_CHAR;
+}
+
+static inline char* pa_maybe_prefix_path(const char *path, const char *prefix)
+{
+    if (pa_is_path_absolute(path))
+        return pa_xstrdup(path);
+    return pa_sprintf_malloc("%s" PA_PATH_SEP "%s", prefix, path);
+}
+
+static inline bool pa_endswith(const char *s, const char *sfx)
+{
+	size_t l1, l2;
+	l1 = strlen(s);
+	l2 = strlen(sfx);
+	return l1 >= l2 && pa_streq(s + l1 - l2, sfx);
+}
+
+static inline char *pa_replace(const char*s, const char*a, const char *b)
+{
+	struct pa_array res;
+	size_t an, bn;
+
+	an = strlen(a);
+	bn = strlen(b);
+	pa_array_init(&res, an);
+
+	for (;;) {
+		const char *p;
+
+		if (!(p = strstr(s, a)))
+			break;
+
+		pa_array_add_data(&res, s, p-s);
+		pa_array_add_data(&res, b, bn);
+		s = p + an;
+	}
+	pa_array_add_data(&res, s, strlen(s) + 1);
+	return res.data;
+}
+
+static inline char *pa_split(const char *c, const char *delimiter, const char**state)
+{
+    const char *current = *state ? *state : c;
+    size_t l;
+    if (!*current)
+        return NULL;
+    l = strcspn(current, delimiter);
+    *state = current+l;
+    if (**state)
+        (*state)++;
+    return pa_xstrndup(current, l);
+}
+
+static inline char *pa_split_spaces(const char *c, const char **state)
+{
+    const char *current = *state ? *state : c;
+    size_t l;
+    if (!*current || *c == 0)
+        return NULL;
+    current += strspn(current, PA_WHITESPACE);
+    l = strcspn(current, PA_WHITESPACE);
+    *state = current+l;
+    return pa_xstrndup(current, l);
+}
+
+static inline char **pa_split_spaces_strv(const char *s)
+{
+    char **t, *e;
+    unsigned i = 0, n = 8;
+    const char *state = NULL;
+
+    t = pa_xnew(char*, n);
+    while ((e = pa_split_spaces(s, &state))) {
+        t[i++] = e;
+        if (i >= n) {
+            n *= 2;
+            t = pa_xrenew(char*, t, n);
+        }
+    }
+    if (i <= 0) {
+        pa_xfree(t);
+        return NULL;
+    }
+    t[i] = NULL;
+    return t;
+}
+
+static inline char* pa_str_strip_suffix(const char *str, const char *suffix)
+{
+    size_t str_l, suf_l, prefix;
+    char *ret;
+
+    str_l = strlen(str);
+    suf_l = strlen(suffix);
+
+    if (str_l < suf_l)
+        return NULL;
+    prefix = str_l - suf_l;
+    if (!pa_streq(&str[prefix], suffix))
+        return NULL;
+    ret = pa_xmalloc(prefix + 1);
+    memcpy(ret, str, prefix);
+    ret[prefix] = '\0';
+    return ret;
+}
+
+static inline const char *pa_split_in_place(const char *c, const char *delimiter, size_t *n, const char**state)
+{
+    const char *current = *state ? *state : c;
+    size_t l;
+    if (!*current)
+        return NULL;
+    l = strcspn(current, delimiter);
+    *state = current+l;
+    if (**state)
+        (*state)++;
+    *n = l;
+    return current;
+}
+
+static inline const char *pa_split_spaces_in_place(const char *c, size_t *n, const char **state)
+{
+    const char *current = *state ? *state : c;
+    size_t l;
+    if (!*current || *c == 0)
+        return NULL;
+    current += strspn(current, PA_WHITESPACE);
+    l = strcspn(current, PA_WHITESPACE);
+    *state = current+l;
+    *n = l;
+    return current;
+}
+
+static inline bool pa_str_in_list_spaces(const char *haystack, const char *needle)
+{
+    const char *s;
+    size_t n;
+    const char *state = NULL;
+
+    if (!haystack || !needle)
+        return false;
+
+    while ((s = pa_split_spaces_in_place(haystack, &n, &state))) {
+        if (pa_strneq(needle, s, n))
+            return true;
+    }
+
+    return false;
+}
+
+static inline char *pa_strip(char *s)
+{
+    char *e, *l = NULL;
+    s += strspn(s, PA_WHITESPACE);
+    for (e = s; *e; e++)
+        if (!strchr(PA_WHITESPACE, *e))
+            l = e;
+    if (l)
+        *(l+1) = 0;
+    else
+        *s = 0;
+    return s;
+}
+
+static inline int pa_atod(const char *s, double *ret_d)
+{
+	if (spa_atod(s, ret_d) && !isnan(*ret_d))
+		return 0;
+	errno = EINVAL;
+	return -1;
+}
+static inline int pa_atoi(const char *s, int32_t *ret_i)
+{
+	if (spa_atoi32(s, ret_i, 0))
+		return 0;
+	errno = EINVAL;
+	return -1;
+}
+static inline int pa_atou(const char *s, uint32_t *ret_u)
+{
+	if (spa_atou32(s, ret_u, 0))
+		return 0;
+	errno = EINVAL;
+	return -1;
+}
+static inline int pa_atol(const char *s, long *ret_l)
+{
+	int64_t res;
+	if (spa_atoi64(s, &res, 0)) {
+		*ret_l = res;
+		if (*ret_l == res)
+			return 0;
+	}
+	errno = EINVAL;
+	return -1;
+}
+
+static inline int pa_parse_boolean(const char *v)
+{
+	if (pa_streq(v, "1") || !strcasecmp(v, "y") || !strcasecmp(v, "t")
+	    || !strcasecmp(v, "yes") || !strcasecmp(v, "true") || !strcasecmp(v, "on"))
+		return 1;
+	else if (pa_streq(v, "0") || !strcasecmp(v, "n") || !strcasecmp(v, "f")
+	    || !strcasecmp(v, "no") || !strcasecmp(v, "false") || !strcasecmp(v, "off"))
+		return 0;
+	errno = EINVAL;
+	return -1;
+}
+
+static inline const char *pa_yes_no(bool b) {
+    return b ? "yes" : "no";
+}
+
+static inline const char *pa_strna(const char *x) {
+    return x ? x : "n/a";
+}
+
+static inline pa_sample_spec* pa_sample_spec_init(pa_sample_spec *spec)
+{
+    spec->format = PA_SAMPLE_INVALID;
+    spec->rate = 0;
+    spec->channels = 0;
+    return spec;
+}
+
+static inline char *pa_readlink(const char *p) {
+#ifdef HAVE_READLINK
+    size_t l = 100;
+
+    for (;;) {
+        char *c;
+        ssize_t n;
+
+        c = pa_xmalloc(l);
+
+        if ((n = readlink(p, c, l-1)) < 0) {
+            pa_xfree(c);
+            return NULL;
+        }
+
+        if ((size_t) n < l-1) {
+            c[n] = 0;
+            return c;
+        }
+
+        pa_xfree(c);
+        l *= 2;
+    }
+#else
+    return NULL;
+#endif
+}
+
+#include <spa/support/i18n.h>
+
+extern struct spa_i18n *acp_i18n;
+
+#define _(String)  spa_i18n_text(acp_i18n, String)
+#ifdef gettext_noop
+#define N_(String) gettext_noop(String)
+#else
+#define N_(String) (String)
+#endif
+
+#include "channelmap.h"
+#include "volume.h"
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PULSE_COMPAT_H */
diff --git a/spa/plugins/alsa/acp/conf-parser.c b/spa/plugins/alsa/acp/conf-parser.c
new file mode 100644
index 0000000..b4d4d47
--- /dev/null
+++ b/spa/plugins/alsa/acp/conf-parser.c
@@ -0,0 +1,387 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "config.h"
+
+#include <dirent.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "compat.h"
+
+#include "conf-parser.h"
+
+#define WHITESPACE " \t\n"
+#define COMMENTS "#;\n"
+
+/* Run the user supplied parser for an assignment */
+static int normal_assignment(pa_config_parser_state *state) {
+    const pa_config_item *item;
+
+    pa_assert(state);
+
+    for (item = state->item_table; item->parse; item++) {
+
+        if (item->lvalue && !pa_streq(state->lvalue, item->lvalue))
+            continue;
+
+        if (item->section && !state->section)
+            continue;
+
+        if (item->section && !pa_streq(state->section, item->section))
+            continue;
+
+        state->data = item->data;
+
+        return item->parse(state);
+    }
+
+    pa_log("[%s:%u] Unknown lvalue '%s' in section '%s'.", state->filename, state->lineno, state->lvalue, pa_strna(state->section));
+
+    return -1;
+}
+
+/* Parse a proplist entry. */
+static int proplist_assignment(pa_config_parser_state *state) {
+    pa_assert(state);
+    pa_assert(state->proplist);
+
+    if (pa_proplist_sets(state->proplist, state->lvalue, state->rvalue) < 0) {
+        pa_log("[%s:%u] Failed to parse a proplist entry: %s = %s", state->filename, state->lineno, state->lvalue, state->rvalue);
+        return -1;
+    }
+
+    return 0;
+}
+
+/* Parse a variable assignment line */
+static int parse_line(pa_config_parser_state *state) {
+    char *c;
+
+    state->lvalue = state->buf + strspn(state->buf, WHITESPACE);
+
+    if ((c = strpbrk(state->lvalue, COMMENTS)))
+        *c = 0;
+
+    if (!*state->lvalue)
+        return 0;
+
+    if (pa_startswith(state->lvalue, ".include ")) {
+        char *path = NULL, *fn;
+        int r;
+
+        fn = pa_strip(state->lvalue + 9);
+        if (!pa_is_path_absolute(fn)) {
+            const char *k;
+            if ((k = strrchr(state->filename, '/'))) {
+                char *dir = pa_xstrndup(state->filename, k - state->filename);
+                fn = path = pa_sprintf_malloc("%s" PA_PATH_SEP "%s", dir, fn);
+                pa_xfree(dir);
+            }
+        }
+
+        r = pa_config_parse(fn, NULL, state->item_table, state->proplist, false, state->userdata);
+        pa_xfree(path);
+        return r;
+    }
+
+    if (*state->lvalue == '[') {
+        size_t k;
+
+        k = strlen(state->lvalue);
+        pa_assert(k > 0);
+
+        if (state->lvalue[k-1] != ']') {
+            pa_log("[%s:%u] Invalid section header.", state->filename, state->lineno);
+            return -1;
+        }
+
+        pa_xfree(state->section);
+        state->section = pa_xstrndup(state->lvalue + 1, k-2);
+
+        if (pa_streq(state->section, "Properties")) {
+            if (!state->proplist) {
+                pa_log("[%s:%u] \"Properties\" section is not allowed in this file.", state->filename, state->lineno);
+                return -1;
+            }
+
+            state->in_proplist = true;
+        } else
+            state->in_proplist = false;
+
+        return 0;
+    }
+
+    if (!(state->rvalue = strchr(state->lvalue, '='))) {
+        pa_log("[%s:%u] Missing '='.", state->filename, state->lineno);
+        return -1;
+    }
+
+    *state->rvalue = 0;
+    state->rvalue++;
+
+    state->lvalue = pa_strip(state->lvalue);
+    state->rvalue = pa_strip(state->rvalue);
+
+    if (state->in_proplist)
+        return proplist_assignment(state);
+    else
+        return normal_assignment(state);
+}
+
+#ifndef OS_IS_WIN32
+static int conf_filter(const struct dirent *entry) {
+    return pa_endswith(entry->d_name, ".conf");
+}
+#endif
+
+/* Go through the file and parse each line */
+int pa_config_parse(const char *filename, FILE *f, const pa_config_item *t, pa_proplist *proplist, bool use_dot_d,
+                    void *userdata) {
+    int r = -1;
+    bool do_close = !f;
+    pa_config_parser_state state;
+
+    pa_assert(filename);
+    pa_assert(t);
+
+    pa_zero(state);
+
+    if (!f && !(f = pa_fopen_cloexec(filename, "r"))) {
+        if (errno == ENOENT) {
+            pa_log_debug("Failed to open configuration file '%s': %s", filename, pa_cstrerror(errno));
+            r = 0;
+            goto finish;
+        }
+
+        pa_log_warn("Failed to open configuration file '%s': %s", filename, pa_cstrerror(errno));
+        goto finish;
+    }
+    pa_log_debug("Parsing configuration file '%s'", filename);
+
+    state.filename = filename;
+    state.item_table = t;
+    state.userdata = userdata;
+
+    if (proplist)
+        state.proplist = pa_proplist_new();
+
+    while (!feof(f)) {
+        if (!fgets(state.buf, sizeof(state.buf), f)) {
+            if (feof(f))
+                break;
+
+            pa_log_warn("Failed to read configuration file '%s': %s", filename, pa_cstrerror(errno));
+            goto finish;
+        }
+
+        state.lineno++;
+
+        if (parse_line(&state) < 0)
+            goto finish;
+    }
+
+    if (proplist)
+        pa_proplist_update(proplist, PA_UPDATE_REPLACE, state.proplist);
+
+    r = 0;
+
+finish:
+    if (state.proplist)
+        pa_proplist_free(state.proplist);
+
+    pa_xfree(state.section);
+
+    if (do_close && f)
+        fclose(f);
+
+    if (use_dot_d) {
+#ifdef OS_IS_WIN32
+        char *dir_name = pa_sprintf_malloc("%s.d", filename);
+        char *pattern = pa_sprintf_malloc("%s\\*.conf", dir_name);
+        HANDLE fh;
+        WIN32_FIND_DATA wfd;
+
+        fh = FindFirstFile(pattern, &wfd);
+        if (fh != INVALID_HANDLE_VALUE) {
+            do {
+                if (!(wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
+                    char *filename2 = pa_sprintf_malloc("%s\\%s", dir_name, wfd.cFileName);
+                    pa_config_parse(filename2, NULL, t, proplist, false, userdata);
+                    pa_xfree(filename2);
+                }
+            } while (FindNextFile(fh, &wfd));
+            FindClose(fh);
+        } else {
+            DWORD err = GetLastError();
+
+            if (err == ERROR_PATH_NOT_FOUND) {
+                pa_log_debug("Pattern %s did not match any files, ignoring.", pattern);
+            } else {
+                LPVOID msgbuf;
+                DWORD fret = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+                                           NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&msgbuf, 0, NULL);
+
+                if (fret != 0) {
+                    pa_log_warn("FindFirstFile(%s) failed with error %ld (%s), ignoring.", pattern, err, (char*)msgbuf);
+                    LocalFree(msgbuf);
+                } else {
+                    pa_log_warn("FindFirstFile(%s) failed with error %ld, ignoring.", pattern, err);
+                    pa_log_warn("FormatMessage failed with error %ld", GetLastError());
+                }
+            }
+        }
+
+        pa_xfree(pattern);
+        pa_xfree(dir_name);
+#else
+        char *dir_name;
+        int n;
+        struct dirent **entries = NULL;
+
+        dir_name = pa_sprintf_malloc("%s.d", filename);
+
+        n = scandir(dir_name, &entries, conf_filter, alphasort);
+        if (n >= 0) {
+            int i;
+
+            for (i = 0; i < n; i++) {
+                char *filename2;
+
+                filename2 = pa_sprintf_malloc("%s" PA_PATH_SEP "%s", dir_name, entries[i]->d_name);
+                pa_config_parse(filename2, NULL, t, proplist, false, userdata);
+                pa_xfree(filename2);
+
+                free(entries[i]);
+            }
+
+            free(entries);
+        } else {
+            if (errno == ENOENT)
+                pa_log_debug("%s does not exist, ignoring.", dir_name);
+            else
+                pa_log_warn("scandir(\"%s\") failed: %s", dir_name, pa_cstrerror(errno));
+        }
+
+        pa_xfree(dir_name);
+#endif
+    }
+
+    return r;
+}
+
+int pa_config_parse_int(pa_config_parser_state *state) {
+    int *i;
+    int32_t k;
+
+    pa_assert(state);
+
+    i = state->data;
+
+    if (pa_atoi(state->rvalue, &k) < 0) {
+        pa_log("[%s:%u] Failed to parse numeric value: %s", state->filename, state->lineno, state->rvalue);
+        return -1;
+    }
+
+    *i = (int) k;
+    return 0;
+}
+
+int pa_config_parse_unsigned(pa_config_parser_state *state) {
+    unsigned *u;
+    uint32_t k;
+
+    pa_assert(state);
+
+    u = state->data;
+
+    if (pa_atou(state->rvalue, &k) < 0) {
+        pa_log("[%s:%u] Failed to parse numeric value: %s", state->filename, state->lineno, state->rvalue);
+        return -1;
+    }
+
+    *u = (unsigned) k;
+    return 0;
+}
+
+int pa_config_parse_size(pa_config_parser_state *state) {
+    size_t *i;
+    uint32_t k;
+
+    pa_assert(state);
+
+    i = state->data;
+
+    if (pa_atou(state->rvalue, &k) < 0) {
+        pa_log("[%s:%u] Failed to parse numeric value: %s", state->filename, state->lineno, state->rvalue);
+        return -1;
+    }
+
+    *i = (size_t) k;
+    return 0;
+}
+
+int pa_config_parse_bool(pa_config_parser_state *state) {
+    int k;
+    bool *b;
+
+    pa_assert(state);
+
+    b = state->data;
+
+    if ((k = pa_parse_boolean(state->rvalue)) < 0) {
+        pa_log("[%s:%u] Failed to parse boolean value: %s", state->filename, state->lineno, state->rvalue);
+        return -1;
+    }
+
+    *b = !!k;
+
+    return 0;
+}
+
+int pa_config_parse_not_bool(pa_config_parser_state *state) {
+    int k;
+    bool *b;
+
+    pa_assert(state);
+
+    b = state->data;
+
+    if ((k = pa_parse_boolean(state->rvalue)) < 0) {
+        pa_log("[%s:%u] Failed to parse boolean value: %s", state->filename, state->lineno, state->rvalue);
+        return -1;
+    }
+
+    *b = !k;
+
+    return 0;
+}
+
+int pa_config_parse_string(pa_config_parser_state *state) {
+    char **s;
+
+    pa_assert(state);
+
+    s = state->data;
+
+    pa_xfree(*s);
+    *s = *state->rvalue ? pa_xstrdup(state->rvalue) : NULL;
+    return 0;
+}
diff --git a/spa/plugins/alsa/acp/conf-parser.h b/spa/plugins/alsa/acp/conf-parser.h
new file mode 100644
index 0000000..4d19d7b
--- /dev/null
+++ b/spa/plugins/alsa/acp/conf-parser.h
@@ -0,0 +1,88 @@
+#ifndef fooconfparserhfoo
+#define fooconfparserhfoo
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdio.h>
+#include <stdbool.h>
+
+#include "compat.h"
+
+/* An abstract parser for simple, line based, shallow configuration
+ * files consisting of variable assignments only. */
+
+typedef struct pa_config_parser_state pa_config_parser_state;
+
+typedef int (*pa_config_parser_cb_t)(pa_config_parser_state *state);
+
+/* Wraps info for parsing a specific configuration variable */
+typedef struct pa_config_item {
+    const char *lvalue; /* name of the variable */
+    pa_config_parser_cb_t parse; /* Function that is called to parse the variable's value */
+    void *data; /* Where to store the variable's data */
+    const char *section;
+} pa_config_item;
+
+struct pa_config_parser_state {
+    const char *filename;
+    unsigned lineno;
+    char *section;
+    char *lvalue;
+    char *rvalue;
+    void *data; /* The data pointer of the current pa_config_item. */
+    void *userdata; /* The pointer that was given to pa_config_parse(). */
+
+    /* Private data to be used only by conf-parser.c. */
+    const pa_config_item *item_table;
+    char buf[4096];
+    pa_proplist *proplist;
+    bool in_proplist;
+};
+
+/* The configuration file parsing routine. Expects a table of
+ * pa_config_items in *t that is terminated by an item where lvalue is
+ * NULL.
+ *
+ * If use_dot_d is true, then after parsing the file named by the filename
+ * argument, the function will parse all files ending with ".conf" in
+ * alphabetical order from a directory whose name is filename + ".d", if such
+ * directory exists.
+ *
+ * Some configuration files may contain a Properties section, which
+ * is a bit special. Normally all accepted lvalues must be predefined
+ * in the pa_config_item table, but in the Properties section the
+ * pa_config_item table is ignored, and all lvalues are accepted (as
+ * long as they are valid proplist keys). If the proplist pointer is
+ * non-NULL, the parser will parse any section named "Properties" as
+ * properties, and those properties will be merged into the given
+ * proplist. If proplist is NULL, then sections named "Properties"
+ * are not allowed at all in the configuration file. */
+int pa_config_parse(const char *filename, FILE *f, const pa_config_item *t, pa_proplist *proplist, bool use_dot_d,
+                    void *userdata);
+
+/* Generic parsers for integers, size_t, booleans and strings */
+int pa_config_parse_int(pa_config_parser_state *state);
+int pa_config_parse_unsigned(pa_config_parser_state *state);
+int pa_config_parse_size(pa_config_parser_state *state);
+int pa_config_parse_bool(pa_config_parser_state *state);
+int pa_config_parse_not_bool(pa_config_parser_state *state);
+int pa_config_parse_string(pa_config_parser_state *state);
+
+#endif
diff --git a/spa/plugins/alsa/acp/device-port.h b/spa/plugins/alsa/acp/device-port.h
new file mode 100644
index 0000000..d6bdc22
--- /dev/null
+++ b/spa/plugins/alsa/acp/device-port.h
@@ -0,0 +1,119 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+
+#ifndef PULSE_DEVICE_PORT_H
+#define PULSE_DEVICE_PORT_H
+
+#ifdef __cplusplus
+extern "C" {
+#else
+#include <stdbool.h>
+#endif
+
+#include "compat.h"
+
+typedef struct pa_card pa_card;
+typedef struct pa_device_port pa_device_port;
+
+/** Port type. \since 14.0 */
+typedef enum pa_device_port_type {
+	PA_DEVICE_PORT_TYPE_UNKNOWN = 0,
+	PA_DEVICE_PORT_TYPE_AUX = 1,
+	PA_DEVICE_PORT_TYPE_SPEAKER = 2,
+	PA_DEVICE_PORT_TYPE_HEADPHONES = 3,
+	PA_DEVICE_PORT_TYPE_LINE = 4,
+	PA_DEVICE_PORT_TYPE_MIC = 5,
+	PA_DEVICE_PORT_TYPE_HEADSET = 6,
+	PA_DEVICE_PORT_TYPE_HANDSET = 7,
+	PA_DEVICE_PORT_TYPE_EARPIECE = 8,
+	PA_DEVICE_PORT_TYPE_SPDIF = 9,
+	PA_DEVICE_PORT_TYPE_HDMI = 10,
+	PA_DEVICE_PORT_TYPE_TV = 11,
+	PA_DEVICE_PORT_TYPE_RADIO = 12,
+	PA_DEVICE_PORT_TYPE_VIDEO = 13,
+	PA_DEVICE_PORT_TYPE_USB = 14,
+	PA_DEVICE_PORT_TYPE_BLUETOOTH = 15,
+	PA_DEVICE_PORT_TYPE_PORTABLE = 16,
+	PA_DEVICE_PORT_TYPE_HANDSFREE = 17,
+	PA_DEVICE_PORT_TYPE_CAR = 18,
+	PA_DEVICE_PORT_TYPE_HIFI = 19,
+	PA_DEVICE_PORT_TYPE_PHONE = 20,
+	PA_DEVICE_PORT_TYPE_NETWORK = 21,
+	PA_DEVICE_PORT_TYPE_ANALOG = 22,
+} pa_device_port_type_t;
+
+struct pa_device_port {
+	struct acp_port port;
+
+	pa_card *card;
+
+	char *name;
+	char *description;
+	char *preferred_profile;
+	pa_device_port_type_t type;
+
+	unsigned priority;
+	pa_available_t available;         /* PA_AVAILABLE_UNKNOWN, PA_AVAILABLE_NO or PA_AVAILABLE_YES */
+	char *availability_group;         /* a string identifier which determine the group of devices handling the available state simultaneously */
+
+	pa_direction_t direction;
+	int64_t latency_offset;
+
+	pa_proplist *proplist;
+	pa_hashmap *profiles;
+	pa_dynarray prof;
+
+	pa_dynarray devices;
+
+	void (*impl_free)(struct pa_device_port *port);
+	void *user_data;
+};
+
+#define PA_DEVICE_PORT_DATA(p) (p->user_data);
+
+typedef struct pa_device_port_new_data {
+	char *name;
+	char *description;
+	pa_available_t available;
+	char *availability_group;
+	pa_direction_t direction;
+	pa_device_port_type_t type;
+} pa_device_port_new_data;
+
+pa_device_port_new_data *pa_device_port_new_data_init(pa_device_port_new_data *data);
+void pa_device_port_new_data_set_name(pa_device_port_new_data *data, const char *name);
+void pa_device_port_new_data_set_description(pa_device_port_new_data *data, const char *description);
+void pa_device_port_new_data_set_available(pa_device_port_new_data *data, pa_available_t available);
+void pa_device_port_new_data_set_availability_group(pa_device_port_new_data *data, const char *group);
+void pa_device_port_new_data_set_direction(pa_device_port_new_data *data, pa_direction_t direction);
+void pa_device_port_new_data_set_type(pa_device_port_new_data *data, pa_device_port_type_t type);
+void pa_device_port_new_data_done(pa_device_port_new_data *data);
+
+pa_device_port *pa_device_port_new(pa_core *c, pa_device_port_new_data *data, size_t extra);
+void pa_device_port_free(pa_device_port *port);
+
+void pa_device_port_set_available(pa_device_port *p, pa_available_t status);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PULSE_DEVICE_PORT_H */
diff --git a/spa/plugins/alsa/acp/dynarray.h b/spa/plugins/alsa/acp/dynarray.h
new file mode 100644
index 0000000..762c84c
--- /dev/null
+++ b/spa/plugins/alsa/acp/dynarray.h
@@ -0,0 +1,159 @@
+/* ALSA Card Profile
+ *
+ * Copyright © 2020 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef PA_DYNARRAY_H
+#define PA_DYNARRAY_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "array.h"
+
+typedef struct pa_dynarray_item {
+	void *ptr;
+} pa_dynarray_item;
+
+typedef struct pa_dynarray {
+	pa_array array;
+	pa_free_cb_t free_cb;
+} pa_dynarray;
+
+static inline void pa_dynarray_init(pa_dynarray *array, pa_free_cb_t free_cb)
+{
+	pa_array_init(&array->array, 16);
+	array->free_cb = free_cb;
+}
+
+static inline void pa_dynarray_item_free(pa_dynarray *array, pa_dynarray_item *item)
+{
+	if (array->free_cb)
+		array->free_cb(item->ptr);
+}
+
+static inline void pa_dynarray_clear(pa_dynarray *array)
+{
+	pa_dynarray_item *item;
+	pa_array_for_each(item, &array->array)
+		pa_dynarray_item_free(array, item);
+	pa_array_clear(&array->array);
+}
+
+static inline pa_dynarray* pa_dynarray_new(pa_free_cb_t free_cb)
+{
+	pa_dynarray *d = calloc(1, sizeof(*d));
+	pa_dynarray_init(d, free_cb);
+	return d;
+}
+
+static inline void pa_dynarray_free(pa_dynarray *array)
+{
+	pa_dynarray_clear(array);
+	free(array);
+}
+
+static inline void pa_dynarray_append(pa_dynarray *array, void *p)
+{
+	pa_dynarray_item *item = pa_array_add(&array->array, sizeof(*item));
+	item->ptr = p;
+}
+
+static inline pa_dynarray_item *pa_dynarray_find_item(pa_dynarray *array, void *p)
+{
+	pa_dynarray_item *item;
+	pa_array_for_each(item, &array->array) {
+		if (item->ptr == p)
+			return item;
+	}
+	return NULL;
+}
+
+static inline pa_dynarray_item *pa_dynarray_get_item(pa_dynarray *array, unsigned i)
+{
+	if (!pa_array_check_index(&array->array, i, pa_dynarray_item))
+		return NULL;
+	return pa_array_get_unchecked(&array->array, i, pa_dynarray_item);
+}
+
+static inline void *pa_dynarray_get(pa_dynarray *array, unsigned i)
+{
+	pa_dynarray_item *item = pa_dynarray_get_item(array, i);
+	if (item == NULL)
+		return NULL;
+	return item->ptr;
+}
+
+static inline int pa_dynarray_insert_by_index(pa_dynarray *array, void *p, unsigned i)
+{
+	unsigned j, len;
+        pa_dynarray_item *item;
+
+	len = pa_array_get_len(&array->array, pa_dynarray_item);
+
+	if (i > len)
+		return -EINVAL;
+
+	item = pa_array_add(&array->array, sizeof(*item));
+	for (j = len; j > i; j--) {
+		item--;
+		item[1].ptr = item[0].ptr;
+	}
+	item->ptr = p;
+	return 0;
+}
+
+static inline int pa_dynarray_remove_by_index(pa_dynarray *array, unsigned i)
+{
+        pa_dynarray_item *item = pa_dynarray_get_item(array, i);
+	if (item == NULL)
+		return -ENOENT;
+	pa_dynarray_item_free(array, item);
+	pa_array_remove(&array->array, item);
+	return 0;
+}
+
+static inline int pa_dynarray_remove_by_data(pa_dynarray *array, void *p)
+{
+	pa_dynarray_item *item = pa_dynarray_find_item(array, p);
+	if (item == NULL)
+		return -ENOENT;
+	pa_dynarray_item_free(array, item);
+	pa_array_remove(&array->array, item);
+	return 0;
+}
+
+static inline unsigned pa_dynarray_size(pa_dynarray *array)
+{
+	return pa_array_get_len(&array->array, pa_dynarray_item);
+}
+
+#define PA_DYNARRAY_FOREACH(elem, array, idx) \
+    for ((idx) = 0; ((elem) = pa_dynarray_get(array, idx)); (idx)++)
+
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif /* PA_DYNARRAY_H */
diff --git a/spa/plugins/alsa/acp/hashmap.h b/spa/plugins/alsa/acp/hashmap.h
new file mode 100644
index 0000000..d8dbadb
--- /dev/null
+++ b/spa/plugins/alsa/acp/hashmap.h
@@ -0,0 +1,219 @@
+/* ALSA Card Profile
+ *
+ * Copyright © 2020 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef PA_HASHMAP_H
+#define PA_HASHMAP_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "array.h"
+
+typedef unsigned (*pa_hash_func_t)(const void *p);
+typedef int (*pa_compare_func_t)(const void *a, const void *b);
+
+typedef struct pa_hashmap_item {
+	void *key;
+	void *value;
+} pa_hashmap_item;
+
+typedef struct pa_hashmap {
+	pa_array array;
+	pa_hash_func_t hash_func;
+	pa_compare_func_t compare_func;
+	pa_free_cb_t key_free_func;
+	pa_free_cb_t value_free_func;
+} pa_hashmap;
+
+static inline pa_hashmap *pa_hashmap_new(pa_hash_func_t hash_func, pa_compare_func_t compare_func)
+{
+        pa_hashmap *m = calloc(1, sizeof(pa_hashmap));
+        pa_array_init(&m->array, 16);
+	m->hash_func = hash_func;
+	m->compare_func = compare_func;
+	return m;
+}
+
+static inline pa_hashmap *pa_hashmap_new_full(pa_hash_func_t hash_func, pa_compare_func_t compare_func,
+		pa_free_cb_t key_free_func, pa_free_cb_t value_free_func)
+{
+	pa_hashmap *m = pa_hashmap_new(hash_func, compare_func);
+	m->key_free_func = key_free_func;
+	m->value_free_func = value_free_func;
+	return m;
+}
+
+static inline void pa_hashmap_item_free(pa_hashmap *h, pa_hashmap_item *item)
+{
+	if (h->key_free_func && item->key)
+		h->key_free_func(item->key);
+	if (h->value_free_func && item->value)
+		h->value_free_func(item->value);
+}
+
+static inline void pa_hashmap_remove_all(pa_hashmap *h)
+{
+	pa_hashmap_item *item;
+	pa_array_for_each(item, &h->array)
+		pa_hashmap_item_free(h, item);
+	pa_array_reset(&h->array);
+}
+
+static inline void pa_hashmap_free(pa_hashmap *h)
+{
+	pa_hashmap_remove_all(h);
+	pa_array_clear(&h->array);
+	free(h);
+}
+
+static inline pa_hashmap_item* pa_hashmap_find_free(pa_hashmap *h)
+{
+	pa_hashmap_item *item;
+	pa_array_for_each(item, &h->array) {
+		if (item->key == NULL)
+			return item;
+	}
+	return pa_array_add(&h->array, sizeof(*item));
+}
+
+static inline pa_hashmap_item* pa_hashmap_find(const pa_hashmap *h, const void *key)
+{
+	pa_hashmap_item *item = NULL;
+	pa_array_for_each(item, &h->array) {
+		if (item->key != NULL && h->compare_func(item->key, key) == 0)
+			return item;
+	}
+	return NULL;
+}
+
+static inline void* pa_hashmap_get(const pa_hashmap *h, const void *key)
+{
+	const pa_hashmap_item *item = pa_hashmap_find(h, key);
+	if (item == NULL)
+		return NULL;
+	return item->value;
+}
+
+static inline int pa_hashmap_put(pa_hashmap *h, void *key, void *value)
+{
+	pa_hashmap_item *item = pa_hashmap_find(h, key);
+	if (item != NULL)
+		return -1;
+	item = pa_hashmap_find_free(h);
+	item->key = key;
+	item->value = value;
+	return 0;
+}
+
+static inline void* pa_hashmap_remove(pa_hashmap *h, const void *key)
+{
+	pa_hashmap_item *item = pa_hashmap_find(h, key);
+	void *value;
+	if (item == NULL)
+		return NULL;
+	value = item->value;
+	if (h->key_free_func)
+		h->key_free_func(item->key);
+	item->key = NULL;
+	item->value = NULL;
+	return value;
+}
+
+static inline int pa_hashmap_remove_and_free(pa_hashmap *h, const void *key)
+{
+	void *val = pa_hashmap_remove(h, key);
+	if (val && h->value_free_func)
+		h->value_free_func(val);
+	return val ? 0 : -1;
+}
+
+static inline void *pa_hashmap_first(const pa_hashmap *h)
+{
+	pa_hashmap_item *item;
+	pa_array_for_each(item, &h->array) {
+		if (item->key != NULL)
+			return item->value;
+	}
+	return NULL;
+}
+
+static inline void *pa_hashmap_iterate(const pa_hashmap *h, void **state, const void **key)
+{
+	pa_hashmap_item *it = *state;
+	if (it == NULL)
+		*state = pa_array_first(&h->array);
+	do {
+		it = *state;
+		if (!pa_array_check(&h->array, it))
+			return NULL;
+		*state = it + 1;
+	} while (it->key == NULL);
+	if (key)
+		*key = it->key;
+	return it->value;
+}
+
+static inline bool pa_hashmap_isempty(const pa_hashmap *h)
+{
+	pa_hashmap_item *item;
+	pa_array_for_each(item, &h->array)
+		if (item->key != NULL)
+			return false;
+	return true;
+}
+
+static inline unsigned pa_hashmap_size(const pa_hashmap *h)
+{
+	unsigned count = 0;
+	pa_hashmap_item *item;
+	pa_array_for_each(item, &h->array)
+		if (item->key != NULL)
+			count++;
+	return count;
+}
+
+static inline void pa_hashmap_sort(pa_hashmap *h,
+		int (*compar)(const void *, const void *))
+{
+        qsort((void*)h->array.data,
+			pa_array_get_len(&h->array, pa_hashmap_item),
+			sizeof(pa_hashmap_item), compar);
+}
+
+#define PA_HASHMAP_FOREACH(e, h, state) \
+	for ((state) = NULL, (e) = pa_hashmap_iterate((h), &(state), NULL);	\
+	    (e); (e) = pa_hashmap_iterate((h), &(state), NULL))
+
+/* A macro to ease iteration through all key, value pairs */
+#define PA_HASHMAP_FOREACH_KV(k, e, h, state) \
+	for ((state) = NULL, (e) = pa_hashmap_iterate((h), &(state), (const void **) &(k));	\
+	    (e); (e) = pa_hashmap_iterate((h), &(state), (const void **) &(k)))
+
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif /* PA_HASHMAP_H */
diff --git a/spa/plugins/alsa/acp/idxset.h b/spa/plugins/alsa/acp/idxset.h
new file mode 100644
index 0000000..6e88a84
--- /dev/null
+++ b/spa/plugins/alsa/acp/idxset.h
@@ -0,0 +1,200 @@
+/* ALSA Card Profile
+ *
+ * Copyright © 2020 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef PA_IDXSET_H
+#define PA_IDXSET_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "array.h"
+
+#define PA_IDXSET_INVALID ((uint32_t) -1)
+
+typedef unsigned (*pa_hash_func_t)(const void *p);
+typedef int (*pa_compare_func_t)(const void *a, const void *b);
+
+typedef struct pa_idxset_item {
+	void *ptr;
+} pa_idxset_item;
+
+typedef struct pa_idxset {
+	pa_array array;
+	pa_hash_func_t hash_func;
+	pa_compare_func_t compare_func;
+} pa_idxset;
+
+static inline unsigned pa_idxset_trivial_hash_func(const void *p)
+{
+	return PA_PTR_TO_UINT(p);
+}
+
+static inline int pa_idxset_trivial_compare_func(const void *a, const void *b)
+{
+	return a < b ? -1 : (a > b ? 1 : 0);
+}
+
+static inline unsigned pa_idxset_string_hash_func(const void *p)
+{
+	unsigned hash = 0;
+	const char *c;
+	for (c = p; *c; c++)
+		hash = 31 * hash + (unsigned) *c;
+	return hash;
+}
+
+static inline int pa_idxset_string_compare_func(const void *a, const void *b)
+{
+	return strcmp(a, b);
+}
+
+static inline pa_idxset *pa_idxset_new(pa_hash_func_t hash_func, pa_compare_func_t compare_func)
+{
+        pa_idxset *s = calloc(1, sizeof(pa_idxset));
+        pa_array_init(&s->array, 16);
+	s->hash_func = hash_func;
+	s->compare_func = compare_func;
+	return s;
+}
+
+static inline void pa_idxset_free(pa_idxset *s, pa_free_cb_t free_cb)
+{
+	if (free_cb) {
+		pa_idxset_item *item;
+		pa_array_for_each(item, &s->array)
+			free_cb(item->ptr);
+	}
+	pa_array_clear(&s->array);
+	free(s);
+}
+
+static inline pa_idxset_item* pa_idxset_find(const pa_idxset *s, const void *ptr)
+{
+	pa_idxset_item *item;
+	pa_array_for_each(item, &s->array) {
+		if (item->ptr == ptr)
+			return item;
+	}
+	return NULL;
+}
+
+static inline int pa_idxset_put(pa_idxset*s, void *p, uint32_t *idx)
+{
+	pa_idxset_item *item = pa_idxset_find(s, p);
+	int res = item ? -1 : 0;
+	if (item == NULL) {
+		item = pa_idxset_find(s, NULL);
+		if (item == NULL)
+			item = pa_array_add(&s->array, sizeof(*item));
+		item->ptr = p;
+	}
+	if (idx)
+		*idx = item - (pa_idxset_item*)s->array.data;
+	return res;
+}
+
+static inline pa_idxset *pa_idxset_copy(pa_idxset *s, pa_copy_func_t copy_func)
+{
+	pa_idxset_item *item;
+	pa_idxset *copy = pa_idxset_new(s->hash_func, s->compare_func);
+	pa_array_for_each(item, &s->array) {
+		if (item->ptr)
+			pa_idxset_put(copy, copy_func ? copy_func(item->ptr) : item->ptr, NULL);
+	}
+	return copy;
+}
+
+static inline bool pa_idxset_isempty(const pa_idxset *s)
+{
+	pa_idxset_item *item;
+	pa_array_for_each(item, &s->array)
+		if (item->ptr != NULL)
+			return false;
+	return true;
+}
+static inline unsigned pa_idxset_size(pa_idxset*s)
+{
+	unsigned count = 0;
+	pa_idxset_item *item;
+	pa_array_for_each(item, &s->array)
+		if (item->ptr != NULL)
+			count++;
+	return count;
+}
+
+static inline void *pa_idxset_search(pa_idxset *s, uint32_t *idx)
+{
+        pa_idxset_item *item;
+	for (item = pa_array_get_unchecked(&s->array, *idx, pa_idxset_item);
+	     pa_array_check(&s->array, item); item++, (*idx)++) {
+		if (item->ptr != NULL)
+			return item->ptr;
+	}
+	*idx = PA_IDXSET_INVALID;
+	return NULL;
+}
+
+static inline void *pa_idxset_next(pa_idxset *s, uint32_t *idx)
+{
+	(*idx)++;;
+	return pa_idxset_search(s, idx);
+}
+
+static inline void* pa_idxset_first(pa_idxset *s, uint32_t *idx)
+{
+	uint32_t i = 0;
+	void *ptr = pa_idxset_search(s, &i);
+	if (idx)
+		*idx = i;
+	return ptr;
+}
+
+static inline void* pa_idxset_get_by_data(pa_idxset*s, const void *p, uint32_t *idx)
+{
+	pa_idxset_item *item = pa_idxset_find(s, p);
+	if (item == NULL)
+		return NULL;
+	if (idx)
+		*idx = item - (pa_idxset_item*)s->array.data;
+	return item->ptr;
+}
+
+static inline void* pa_idxset_get_by_index(pa_idxset*s, uint32_t idx)
+{
+        pa_idxset_item *item;
+	if (!pa_array_check_index(&s->array, idx, pa_idxset_item))
+		return NULL;
+	item = pa_array_get_unchecked(&s->array, idx, pa_idxset_item);
+	return item->ptr;
+}
+
+#define PA_IDXSET_FOREACH(e, s, idx) \
+	for ((e) = pa_idxset_first((s), &(idx)); (e); (e) = pa_idxset_next((s), &(idx)))
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif /* PA_IDXSET_H */
diff --git a/spa/plugins/alsa/acp/llist.h b/spa/plugins/alsa/acp/llist.h
new file mode 100644
index 0000000..950375f
--- /dev/null
+++ b/spa/plugins/alsa/acp/llist.h
@@ -0,0 +1,109 @@
+#ifndef foollistfoo
+#define foollistfoo
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as
+  published by the Free Software Foundation; either version 2.1 of the
+  License, or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+/* Some macros for maintaining doubly linked lists */
+
+/* The head of the linked list. Use this in the structure that shall
+ * contain the head of the linked list */
+#define PA_LLIST_HEAD(t,name)                                           \
+    t *name
+
+/* The pointers in the linked list's items. Use this in the item structure */
+#define PA_LLIST_FIELDS(t)                                              \
+    t *next, *prev
+
+/* Initialize the list's head */
+#define PA_LLIST_HEAD_INIT(t,item)                                      \
+    do {                                                                \
+        (item) = (t*) NULL; }                                           \
+    while(0)
+
+/* Initialize a list item */
+#define PA_LLIST_INIT(t,item)                                           \
+    do {                                                                \
+        t *_item = (item);                                              \
+        pa_assert(_item);                                               \
+        _item->prev = _item->next = NULL;                               \
+    } while(0)
+
+/* Prepend an item to the list */
+#define PA_LLIST_PREPEND(t,head,item)                                   \
+    do {                                                                \
+        t **_head = &(head), *_item = (item);                           \
+        pa_assert(_item);                                               \
+        if ((_item->next = *_head))                                     \
+            _item->next->prev = _item;                                  \
+        _item->prev = NULL;                                             \
+        *_head = _item;                                                 \
+    } while (0)
+
+/* Remove an item from the list */
+#define PA_LLIST_REMOVE(t,head,item)                                    \
+    do {                                                                \
+        t **_head = &(head), *_item = (item);                           \
+        pa_assert(_item);                                               \
+        if (_item->next)                                                \
+            _item->next->prev = _item->prev;                            \
+        if (_item->prev)                                                \
+            _item->prev->next = _item->next;                            \
+        else {                                                          \
+            pa_assert(*_head == _item);                                 \
+            *_head = _item->next;                                       \
+        }                                                               \
+        _item->next = _item->prev = NULL;                               \
+    } while(0)
+
+/* Find the head of the list */
+#define PA_LLIST_FIND_HEAD(t,item,head)                                 \
+    do {                                                                \
+        t **_head = (head), *_item = (item);                            \
+        *_head = _item;                                                 \
+        pa_assert(_head);                                               \
+        while ((*_head)->prev)                                          \
+            *_head = (*_head)->prev;                                    \
+    } while (0)
+
+/* Insert an item after another one (a = where, b = what) */
+#define PA_LLIST_INSERT_AFTER(t,head,a,b)                               \
+    do {                                                                \
+        t **_head = &(head), *_a = (a), *_b = (b);                      \
+        pa_assert(_b);                                                  \
+        if (!_a) {                                                      \
+            if ((_b->next = *_head))                                    \
+                _b->next->prev = _b;                                    \
+            _b->prev = NULL;                                            \
+            *_head = _b;                                                \
+        } else {                                                        \
+            if ((_b->next = _a->next))                                  \
+                _b->next->prev = _b;                                    \
+            _b->prev = _a;                                              \
+            _a->next = _b;                                              \
+        }                                                               \
+    } while (0)
+
+#define PA_LLIST_FOREACH(i,head)                                        \
+    for (i = (head); i; i = i->next)
+
+#define PA_LLIST_FOREACH_SAFE(i,n,head)                                 \
+    for (i = (head); i && ((n = i->next), 1); i = n)
+
+#endif
diff --git a/spa/plugins/alsa/acp/meson.build b/spa/plugins/alsa/acp/meson.build
new file mode 100644
index 0000000..0ec97e2
--- /dev/null
+++ b/spa/plugins/alsa/acp/meson.build
@@ -0,0 +1,22 @@
+acp_sources = [
+  'acp.c',
+  'compat.c',
+  'alsa-mixer.c',
+  'alsa-ucm.c',
+  'alsa-util.c',
+  'conf-parser.c',
+]
+
+acp_c_args = [
+  '-DHAVE_ALSA_UCM',
+  '-DHAVE_READLINK',
+]
+
+acp_lib = static_library(
+  'acp',
+  acp_sources,
+  c_args : acp_c_args,
+  include_directories : [configinc, includes_inc ],
+  dependencies : [ spa_dep, alsa_dep, mathlib, ]
+  )
+acp_dep = declare_dependency(link_with: acp_lib)
diff --git a/spa/plugins/alsa/acp/proplist.h b/spa/plugins/alsa/acp/proplist.h
new file mode 100644
index 0000000..ed4cc5d
--- /dev/null
+++ b/spa/plugins/alsa/acp/proplist.h
@@ -0,0 +1,211 @@
+/* ALSA Card Profile
+ *
+ * Copyright © 2020 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef PA_PROPLIST_H
+#define PA_PROPLIST_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdio.h>
+
+#include "array.h"
+#include "acp.h"
+
+#define PA_PROP_DEVICE_DESCRIPTION             "device.description"
+
+#define PA_PROP_DEVICE_CLASS                   "device.class"
+
+#define PA_PROP_DEVICE_FORM_FACTOR             "device.form_factor"
+
+#define PA_PROP_DEVICE_INTENDED_ROLES          "device.intended_roles"
+
+#define PA_PROP_DEVICE_PROFILE_NAME            "device.profile.name"
+
+#define PA_PROP_DEVICE_STRING                  "device.string"
+
+#define PA_PROP_DEVICE_API                     "device.api"
+
+#define PA_PROP_DEVICE_PRODUCT_NAME            "device.product.name"
+
+#define PA_PROP_DEVICE_PROFILE_DESCRIPTION     "device.profile.description"
+
+typedef struct pa_proplist_item {
+	char *key;
+	char *value;
+} pa_proplist_item;
+
+typedef struct pa_proplist {
+	struct pa_array array;
+} pa_proplist;
+
+static inline pa_proplist* pa_proplist_new(void)
+{
+	pa_proplist *p = calloc(1, sizeof(*p));
+	pa_array_init(&p->array, 16);
+	return p;
+}
+static inline pa_proplist_item* pa_proplist_item_find(const pa_proplist *p, const void *key)
+{
+	pa_proplist_item *item;
+	pa_array_for_each(item, &p->array) {
+		if (strcmp(key, item->key) == 0)
+			return item;
+	}
+	return NULL;
+}
+
+static inline void pa_proplist_item_free(pa_proplist_item* it)
+{
+	free(it->key);
+	free(it->value);
+}
+
+static inline void pa_proplist_clear(pa_proplist* p)
+{
+	pa_proplist_item *item;
+	pa_array_for_each(item, &p->array)
+		pa_proplist_item_free(item);
+	pa_array_reset(&p->array);
+}
+
+static inline void pa_proplist_free(pa_proplist* p)
+{
+	pa_proplist_clear(p);
+	pa_array_clear(&p->array);
+	free(p);
+}
+
+static inline unsigned pa_proplist_size(const pa_proplist *p)
+{
+	return pa_array_get_len(&p->array, pa_proplist_item);
+}
+
+static inline int pa_proplist_contains(const pa_proplist *p, const char *key)
+{
+	return pa_proplist_item_find(p, key) ? 1 : 0;
+}
+
+static inline int pa_proplist_sets(pa_proplist *p, const char *key, const char *value)
+{
+	pa_proplist_item *item = pa_proplist_item_find(p, key);
+	if (item != NULL)
+		pa_proplist_item_free(item);
+        else
+                item = pa_array_add(&p->array, sizeof(*item));
+	item->key = strdup(key);
+	item->value = strdup(value);
+	return 0;
+}
+
+static inline int pa_proplist_unset(pa_proplist *p, const char *key)
+{
+	pa_proplist_item *item = pa_proplist_item_find(p, key);
+	if (item == NULL)
+		return -ENOENT;
+	pa_proplist_item_free(item);
+	pa_array_remove(&p->array, item);
+	return 0;
+}
+
+static PA_PRINTF_FUNC(3,4) inline int pa_proplist_setf(pa_proplist *p, const char *key, const char *format, ...)
+{
+	pa_proplist_item *item = pa_proplist_item_find(p, key);
+	va_list args;
+	int res;
+
+	va_start(args, format);
+	if (item != NULL)
+		pa_proplist_item_free(item);
+        else
+                item = pa_array_add(&p->array, sizeof(*item));
+	item->key = strdup(key);
+	if ((res = vasprintf(&item->value, format, args)) < 0)
+		res = -errno;
+	va_end(args);
+	return res;
+}
+
+static inline const char *pa_proplist_gets(const pa_proplist *p, const char *key)
+{
+	pa_proplist_item *item = pa_proplist_item_find(p, key);
+	return item ? item->value : NULL;
+}
+
+typedef enum pa_update_mode {
+    PA_UPDATE_SET
+    /**< Replace the entire property list with the new one. Don't keep
+     *  any of the old data around. */,
+    PA_UPDATE_MERGE
+    /**< Merge new property list into the existing one, not replacing
+     *  any old entries if they share a common key with the new
+     *  property list. */,
+    PA_UPDATE_REPLACE
+    /**< Merge new property list into the existing one, replacing all
+     *  old entries that share a common key with the new property
+     *  list. */
+} pa_update_mode_t;
+
+
+static inline void pa_proplist_update(pa_proplist *p, pa_update_mode_t mode, const pa_proplist *other)
+{
+	pa_proplist_item *item;
+
+	if (mode == PA_UPDATE_SET)
+		pa_proplist_clear(p);
+
+	pa_array_for_each(item, &other->array) {
+		if (mode == PA_UPDATE_MERGE && pa_proplist_contains(p, item->key))
+			continue;
+		pa_proplist_sets(p, item->key, item->value);
+	}
+}
+
+static inline pa_proplist* pa_proplist_new_dict(const struct acp_dict *dict)
+{
+	pa_proplist *p = pa_proplist_new();
+	if (dict) {
+		const struct acp_dict_item *item;
+		struct acp_dict_item *it;
+		acp_dict_for_each(item, dict) {
+			it = pa_array_add(&p->array, sizeof(*it));
+			it->key = strdup(item->key);
+			it->value = strdup(item->value);
+		}
+	}
+	return p;
+}
+
+static inline void pa_proplist_as_dict(const pa_proplist *p, struct acp_dict *dict)
+{
+	dict->n_items = pa_proplist_size(p);
+	dict->items = p->array.data;
+}
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif /* PA_PROPLIST_H */
diff --git a/spa/plugins/alsa/acp/volume.h b/spa/plugins/alsa/acp/volume.h
new file mode 100644
index 0000000..b916bd2
--- /dev/null
+++ b/spa/plugins/alsa/acp/volume.h
@@ -0,0 +1,207 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifndef PA_VOLUME_H
+#define PA_VOLUME_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <math.h>
+
+typedef uint32_t pa_volume_t;
+
+#define PA_VOLUME_MUTED ((pa_volume_t) 0U)
+#define PA_VOLUME_NORM ((pa_volume_t) 0x10000U)
+#define PA_VOLUME_MAX ((pa_volume_t) UINT32_MAX/2)
+
+#ifdef INFINITY
+#define PA_DECIBEL_MININFTY ((double) -INFINITY)
+#else
+#define PA_DECIBEL_MININFTY ((double) -200.0)
+#endif
+
+#define PA_CLAMP_VOLUME(v) (PA_CLAMP_UNLIKELY((v), PA_VOLUME_MUTED, PA_VOLUME_MAX))
+
+typedef struct pa_cvolume {
+	uint32_t channels;                     /**< Number of channels */
+	pa_volume_t values[PA_CHANNELS_MAX];  /**< Per-channel volume */
+} pa_cvolume;
+
+static inline double pa_volume_linear_to_dB(double v)
+{
+	return 20.0 * log10(v);
+}
+
+static inline double pa_sw_volume_to_linear(pa_volume_t v)
+{
+	double f;
+	if (v <= PA_VOLUME_MUTED)
+		return 0.0;
+	if (v == PA_VOLUME_NORM)
+		return 1.0;
+	f = ((double) v / PA_VOLUME_NORM);
+	return f*f*f;
+}
+
+static inline double pa_sw_volume_to_dB(pa_volume_t v)
+{
+	if (v <= PA_VOLUME_MUTED)
+		return PA_DECIBEL_MININFTY;
+	return pa_volume_linear_to_dB(pa_sw_volume_to_linear(v));
+}
+
+static inline double pa_volume_dB_to_linear(double v)
+{
+    return pow(10.0, v / 20.0);
+}
+
+static inline pa_volume_t pa_sw_volume_from_linear(double v)
+{
+    if (v <= 0.0)
+        return PA_VOLUME_MUTED;
+    return (pa_volume_t) PA_CLAMP_VOLUME((uint64_t) lround(cbrt(v) * PA_VOLUME_NORM));
+}
+
+static inline pa_volume_t pa_sw_volume_from_dB(double dB)
+{
+    if (isinf(dB) < 0 || dB <= PA_DECIBEL_MININFTY)
+        return PA_VOLUME_MUTED;
+    return pa_sw_volume_from_linear(pa_volume_dB_to_linear(dB));
+}
+
+static inline pa_cvolume* pa_cvolume_set(pa_cvolume *a, unsigned channels, pa_volume_t v)
+{
+	uint32_t i;
+	a->channels = (uint8_t) channels;
+	for (i = 0; i < a->channels; i++)
+		a->values[i] = PA_CLAMP_VOLUME(v);
+	return a;
+}
+
+static inline int pa_cvolume_equal(const pa_cvolume *a, const pa_cvolume *b)
+{
+	uint32_t i;
+	if (PA_UNLIKELY(a == b))
+		return 1;
+	if (a->channels != b->channels)
+		return 0;
+	for (i = 0; i < a->channels; i++)
+		if (a->values[i] != b->values[i])
+			return 0;
+	return 1;
+}
+
+static inline pa_volume_t pa_sw_volume_multiply(pa_volume_t a, pa_volume_t b)
+{
+	uint64_t result;
+	result = ((uint64_t) a * (uint64_t) b + (uint64_t) PA_VOLUME_NORM / 2ULL) /
+		(uint64_t) PA_VOLUME_NORM;
+	if (result > (uint64_t)PA_VOLUME_MAX)
+		pa_log_warn("pa_sw_volume_multiply: Volume exceeds maximum allowed value and will be clipped. Please check your volume settings.");
+	return (pa_volume_t) PA_CLAMP_VOLUME(result);
+}
+
+static inline pa_cvolume *pa_sw_cvolume_multiply(pa_cvolume *dest,
+		const pa_cvolume *a, const pa_cvolume *b)
+{
+	unsigned i;
+	dest->channels = PA_MIN(a->channels, b->channels);
+	for (i = 0; i < dest->channels; i++)
+		dest->values[i] = pa_sw_volume_multiply(a->values[i], b->values[i]);
+	return dest;
+}
+
+static inline pa_cvolume *pa_sw_cvolume_multiply_scalar(pa_cvolume *dest,
+		const pa_cvolume *a, pa_volume_t b)
+{
+	unsigned i;
+	for (i = 0; i < a->channels; i++)
+		dest->values[i] = pa_sw_volume_multiply(a->values[i], b);
+	dest->channels = (uint8_t) i;
+	return dest;
+}
+
+static inline pa_volume_t pa_sw_volume_divide(pa_volume_t a, pa_volume_t b)
+{
+    uint64_t result;
+    if (b <= PA_VOLUME_MUTED)
+        return 0;
+    result = ((uint64_t) a * (uint64_t) PA_VOLUME_NORM + (uint64_t) b / 2ULL) / (uint64_t) b;
+    if (result > (uint64_t)PA_VOLUME_MAX)
+        pa_log_warn("pa_sw_volume_divide: Volume exceeds maximum allowed value and will be clipped. Please check your volume settings.");
+    return (pa_volume_t) PA_CLAMP_VOLUME(result);
+}
+
+static inline pa_cvolume *pa_sw_cvolume_divide_scalar(pa_cvolume *dest,
+		const pa_cvolume *a, pa_volume_t b) {
+    unsigned i;
+    for (i = 0; i < a->channels; i++)
+        dest->values[i] = pa_sw_volume_divide(a->values[i], b);
+    dest->channels = (uint8_t) i;
+    return dest;
+}
+
+static inline pa_cvolume *pa_sw_cvolume_divide(pa_cvolume *dest,
+		const pa_cvolume *a, const pa_cvolume *b)
+{
+    unsigned i;
+    dest->channels = PA_MIN(a->channels, b->channels);
+    for (i = 0; i < dest->channels; i++)
+        dest->values[i] = pa_sw_volume_divide(a->values[i], b->values[i]);
+    return dest;
+}
+
+#define pa_cvolume_reset(a, n) pa_cvolume_set((a), (n), PA_VOLUME_NORM)
+#define pa_cvolume_mute(a, n) pa_cvolume_set((a), (n), PA_VOLUME_MUTED)
+
+static inline int pa_cvolume_compatible_with_channel_map(const pa_cvolume *v,
+		const pa_channel_map *cm)
+{
+    return v->channels == cm->channels;
+}
+
+static inline pa_volume_t pa_cvolume_max(const pa_cvolume *a)
+{
+	pa_volume_t m = PA_VOLUME_MUTED;
+	unsigned c;
+	for (c = 0; c < a->channels; c++)
+	        if (a->values[c] > m)
+			m = a->values[c];
+	return m;
+}
+
+static inline pa_volume_t pa_cvolume_min(const pa_cvolume *a)
+{
+	pa_volume_t m = PA_VOLUME_MAX;
+	unsigned c;
+	for (c = 0; c < a->channels; c++)
+		if (a->values[c] < m)
+			m = a->values[c];
+	return m;
+}
+
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif /* PA_VOLUME_H */