1 files changed, 581 insertions, 0 deletions

diff --git a/spa/plugins/alsa/alsa-pcm-device.c b/spa/plugins/alsa/alsa-pcm-device.c
new file mode 100644
index 0000000..984f1d0
--- /dev/null
+++ b/spa/plugins/alsa/alsa-pcm-device.c
@@ -0,0 +1,581 @@
+/* Spa ALSA Device
+ *
+ * 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.
+ */
+
+#include <stddef.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <poll.h>
+
+#include <alsa/asoundlib.h>
+
+#include <spa/node/node.h>
+#include <spa/utils/type.h>
+#include <spa/utils/keys.h>
+#include <spa/utils/names.h>
+#include <spa/utils/string.h>
+#include <spa/support/log.h>
+#include <spa/support/loop.h>
+#include <spa/support/plugin.h>
+#include <spa/monitor/device.h>
+#include <spa/monitor/utils.h>
+#include <spa/param/param.h>
+#include <spa/pod/filter.h>
+#include <spa/pod/parser.h>
+#include <spa/debug/pod.h>
+#include <spa/debug/log.h>
+
+#include "alsa.h"
+
+#define MAX_DEVICES	64
+
+static const char default_device[] = "hw:0";
+
+struct props {
+	char device[64];
+};
+
+static void reset_props(struct props *props)
+{
+	strncpy(props->device, default_device, 64);
+}
+
+struct impl {
+	struct spa_handle handle;
+	struct spa_device device;
+
+	struct spa_log *log;
+
+	struct spa_hook_list hooks;
+
+	struct props props;
+	uint32_t n_nodes;
+	uint32_t n_capture;
+	uint32_t n_playback;
+
+	uint32_t profile;
+};
+
+static const char *get_stream(snd_pcm_info_t *pcminfo)
+{
+	switch (snd_pcm_info_get_stream(pcminfo)) {
+	case SND_PCM_STREAM_PLAYBACK:
+		return "playback";
+	case SND_PCM_STREAM_CAPTURE:
+		return "capture";
+	default:
+		return "unknown";
+	}
+}
+
+static const char *get_class(snd_pcm_info_t *pcminfo)
+{
+	switch (snd_pcm_info_get_class(pcminfo)) {
+	case SND_PCM_CLASS_GENERIC:
+		return "generic";
+	case SND_PCM_CLASS_MULTI:
+		return "multichannel";
+	case SND_PCM_CLASS_MODEM:
+		return "modem";
+	case SND_PCM_CLASS_DIGITIZER:
+		return "digitizer";
+	default:
+		return "unknown";
+	}
+}
+
+static const char *get_subclass(snd_pcm_info_t *pcminfo)
+{
+	switch (snd_pcm_info_get_subclass(pcminfo)) {
+	case SND_PCM_SUBCLASS_GENERIC_MIX:
+		return "generic-mix";
+	case SND_PCM_SUBCLASS_MULTI_MIX:
+		return "multichannel-mix";
+	default:
+		return "unknown";
+	}
+}
+
+static int emit_node(struct impl *this, snd_ctl_card_info_t *cardinfo, snd_pcm_info_t *pcminfo, uint32_t id)
+{
+	struct spa_dict_item items[12];
+	char device_name[128], path[180];
+	char sync_name[128], dev[16], subdev[16], card[16];
+	struct spa_device_object_info info;
+	snd_pcm_sync_id_t sync_id;
+	const char *stream;
+
+	info = SPA_DEVICE_OBJECT_INFO_INIT();
+	info.type = SPA_TYPE_INTERFACE_Node;
+
+	if (snd_pcm_info_get_stream(pcminfo) == SND_PCM_STREAM_PLAYBACK) {
+		info.factory_name = SPA_NAME_API_ALSA_PCM_SINK;
+		stream = "playback";
+	} else {
+		info.factory_name = SPA_NAME_API_ALSA_PCM_SOURCE;
+		stream = "capture";
+	}
+
+	info.change_mask = SPA_DEVICE_OBJECT_CHANGE_MASK_PROPS;
+
+	snprintf(card, sizeof(card), "%d", snd_pcm_info_get_card(pcminfo));
+	snprintf(dev, sizeof(dev), "%d", snd_pcm_info_get_device(pcminfo));
+	snprintf(subdev, sizeof(subdev), "%d", snd_pcm_info_get_subdevice(pcminfo));
+	snprintf(device_name, sizeof(device_name), "%s,%s", this->props.device, dev);
+	snprintf(path, sizeof(path), "alsa:pcm:%s:%s:%s", snd_ctl_card_info_get_id(cardinfo), dev, stream);
+	items[0] = SPA_DICT_ITEM_INIT(SPA_KEY_OBJECT_PATH,	       path);
+	items[1] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PATH,           device_name);
+	items[2] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_CARD,       card);
+	items[3] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_DEVICE,     dev);
+	items[4] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_SUBDEVICE,  subdev);
+	items[5] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_STREAM,     get_stream(pcminfo));
+	items[6] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_ID,         snd_pcm_info_get_id(pcminfo));
+	items[7] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_NAME,       snd_pcm_info_get_name(pcminfo));
+	items[8] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_SUBNAME,    snd_pcm_info_get_subdevice_name(pcminfo));
+	items[9] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_CLASS,      get_class(pcminfo));
+	items[10] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_SUBCLASS,  get_subclass(pcminfo));
+	sync_id = snd_pcm_info_get_sync(pcminfo);
+	snprintf(sync_name, sizeof(sync_name), "%08x:%08x:%08x:%08x",
+			sync_id.id32[0], sync_id.id32[1], sync_id.id32[2], sync_id.id32[3]);
+	items[11] = SPA_DICT_ITEM_INIT(SPA_KEY_API_ALSA_PCM_SYNC_ID,    sync_name);
+	info.props = &SPA_DICT_INIT_ARRAY(items);
+
+	spa_device_emit_object_info(&this->hooks, id, &info);
+
+	return 0;
+}
+
+static int activate_profile(struct impl *this, snd_ctl_t *ctl_hndl, uint32_t id)
+{
+	int err = 0, dev;
+	uint32_t i, n_cap, n_play;
+	snd_pcm_info_t *pcminfo;
+	snd_ctl_card_info_t *cardinfo;
+
+	spa_log_debug(this->log, "profile %d", id);
+	this->profile = id;
+
+	snd_ctl_card_info_alloca(&cardinfo);
+	if ((err = snd_ctl_card_info(ctl_hndl, cardinfo)) < 0) {
+		spa_log_error(this->log, "error card info: %s", snd_strerror(err));
+		return err;
+	}
+
+	for (i = 0; i < this->n_nodes; i++)
+		spa_device_emit_object_info(&this->hooks, i, NULL);
+
+	this->n_nodes = this->n_capture = this->n_playback = 0;
+
+	if (id == 0)
+		return 0;
+
+        snd_pcm_info_alloca(&pcminfo);
+	dev = -1;
+	i = n_cap = n_play = 0;
+	while (1) {
+		if ((err = snd_ctl_pcm_next_device(ctl_hndl, &dev)) < 0) {
+			spa_log_error(this->log, "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);
+
+		snd_pcm_info_set_stream(pcminfo, SND_PCM_STREAM_PLAYBACK);
+		if ((err = snd_ctl_pcm_info(ctl_hndl, pcminfo)) < 0) {
+			if (err != -ENOENT)
+				spa_log_error(this->log, "error pcm info: %s", snd_strerror(err));
+		}
+		if (err >= 0) {
+			n_play++;
+			emit_node(this, cardinfo, pcminfo, i++);
+		}
+
+		snd_pcm_info_set_stream(pcminfo, SND_PCM_STREAM_CAPTURE);
+		if ((err = snd_ctl_pcm_info(ctl_hndl, pcminfo)) < 0) {
+			if (err != -ENOENT)
+				spa_log_error(this->log, "error pcm info: %s", snd_strerror(err));
+		}
+		if (err >= 0) {
+			n_cap++;
+			emit_node(this, cardinfo, pcminfo, i++);
+		}
+	}
+	this->n_capture = n_cap;
+	this->n_playback = n_play;
+	this->n_nodes = i;
+	return err;
+}
+
+static int set_profile(struct impl *this, uint32_t id)
+{
+	snd_ctl_t *ctl_hndl;
+	int err;
+
+	spa_log_debug(this->log, "open card %s", this->props.device);
+	if ((err = snd_ctl_open(&ctl_hndl, this->props.device, 0)) < 0) {
+		spa_log_error(this->log, "can't open control for card %s: %s",
+				this->props.device, snd_strerror(err));
+		return err;
+	}
+
+	err = activate_profile(this, ctl_hndl, id);
+
+	spa_log_debug(this->log, "close card %s", this->props.device);
+	snd_ctl_close(ctl_hndl);
+
+	return err;
+}
+
+static int emit_info(struct impl *this, bool full)
+{
+	int err = 0;
+	struct spa_dict_item items[20];
+	uint32_t n_items = 0;
+	snd_ctl_t *ctl_hndl;
+	snd_ctl_card_info_t *info;
+	struct spa_device_info dinfo;
+	struct spa_param_info params[2];
+	char path[128];
+
+	spa_log_debug(this->log, "open card %s", this->props.device);
+	if ((err = snd_ctl_open(&ctl_hndl, this->props.device, 0)) < 0) {
+		spa_log_error(this->log, "can't open control for card %s: %s",
+				this->props.device, snd_strerror(err));
+		return err;
+	}
+
+	snd_ctl_card_info_alloca(&info);
+	if ((err = snd_ctl_card_info(ctl_hndl, info)) < 0) {
+		spa_log_error(this->log, "error hardware info: %s", snd_strerror(err));
+		goto exit;
+	}
+
+	dinfo = SPA_DEVICE_INFO_INIT();
+
+	dinfo.change_mask = SPA_DEVICE_CHANGE_MASK_PROPS;
+
+#define ADD_ITEM(key, value) items[n_items++] = SPA_DICT_ITEM_INIT(key, value)
+	snprintf(path, sizeof(path), "alsa:pcm:%s", snd_ctl_card_info_get_id(info));
+	ADD_ITEM(SPA_KEY_OBJECT_PATH, path);
+	ADD_ITEM(SPA_KEY_DEVICE_API, "alsa:pcm");
+	ADD_ITEM(SPA_KEY_MEDIA_CLASS, "Audio/Device");
+	ADD_ITEM(SPA_KEY_API_ALSA_PATH,	(char *)this->props.device);
+	ADD_ITEM(SPA_KEY_API_ALSA_CARD_ID, snd_ctl_card_info_get_id(info));
+	ADD_ITEM(SPA_KEY_API_ALSA_CARD_COMPONENTS, snd_ctl_card_info_get_components(info));
+	ADD_ITEM(SPA_KEY_API_ALSA_CARD_DRIVER, snd_ctl_card_info_get_driver(info));
+	ADD_ITEM(SPA_KEY_API_ALSA_CARD_NAME, snd_ctl_card_info_get_name(info));
+	ADD_ITEM(SPA_KEY_API_ALSA_CARD_LONGNAME, snd_ctl_card_info_get_longname(info));
+	ADD_ITEM(SPA_KEY_API_ALSA_CARD_MIXERNAME, snd_ctl_card_info_get_mixername(info));
+	dinfo.props = &SPA_DICT_INIT(items, n_items);
+#undef ADD_ITEM
+
+	dinfo.change_mask |= SPA_DEVICE_CHANGE_MASK_PARAMS;
+	params[0] = SPA_PARAM_INFO(SPA_PARAM_EnumProfile, SPA_PARAM_INFO_READ);
+	params[1] = SPA_PARAM_INFO(SPA_PARAM_Profile, SPA_PARAM_INFO_READWRITE);
+	dinfo.n_params = SPA_N_ELEMENTS(params);
+	dinfo.params = params;
+
+	spa_device_emit_info(&this->hooks, &dinfo);
+
+      exit:
+	spa_log_debug(this->log, "close card %s", this->props.device);
+	snd_ctl_close(ctl_hndl);
+	return err;
+}
+
+static int impl_add_listener(void *object,
+			struct spa_hook *listener,
+			const struct spa_device_events *events,
+			void *data)
+{
+	struct impl *this = object;
+	struct spa_hook_list save;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+	spa_return_val_if_fail(events != NULL, -EINVAL);
+
+	spa_hook_list_isolate(&this->hooks, &save, listener, events, data);
+
+	if (events->info || events->object_info)
+		emit_info(this, true);
+
+	spa_hook_list_join(&this->hooks, &save);
+
+	return 0;
+}
+
+
+static int impl_sync(void *object, int seq)
+{
+	struct impl *this = object;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	spa_device_emit_result(&this->hooks, seq, 0, 0, NULL);
+
+	return 0;
+}
+
+static struct spa_pod *build_profile(struct impl *this, struct spa_pod_builder *b,
+		uint32_t id, uint32_t index)
+{
+	struct spa_pod_frame f[2];
+	const char *name, *desc;
+
+	switch (index) {
+	case 0:
+		name = "off";
+		desc = "Off";
+		break;
+	case 1:
+		name = "on";
+		desc = "On";
+		break;
+	default:
+		errno = EINVAL;
+		return NULL;
+	}
+
+	spa_pod_builder_push_object(b, &f[0], SPA_TYPE_OBJECT_ParamProfile, id);
+	spa_pod_builder_add(b,
+		SPA_PARAM_PROFILE_index,   SPA_POD_Int(index),
+		SPA_PARAM_PROFILE_name, SPA_POD_String(name),
+		SPA_PARAM_PROFILE_description, SPA_POD_String(desc),
+		0);
+	if (index == 1) {
+		spa_pod_builder_prop(b, SPA_PARAM_PROFILE_classes, 0);
+		spa_pod_builder_push_struct(b, &f[1]);
+		if (this->n_capture) {
+			spa_pod_builder_add_struct(b,
+				SPA_POD_String("Audio/Source"),
+				SPA_POD_Int(this->n_capture));
+		}
+		if (this->n_playback) {
+			spa_pod_builder_add_struct(b,
+				SPA_POD_String("Audio/Sink"),
+				SPA_POD_Int(this->n_playback));
+		}
+		spa_pod_builder_pop(b, &f[1]);
+	}
+	return spa_pod_builder_pop(b, &f[0]);
+
+}
+static int impl_enum_params(void *object, int seq,
+			    uint32_t id, uint32_t start, uint32_t num,
+			    const struct spa_pod *filter)
+{
+	struct impl *this = object;
+	struct spa_pod *param;
+	struct spa_pod_builder b = { 0 };
+	uint8_t buffer[1024];
+	struct spa_result_device_params result;
+	uint32_t count = 0;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+	spa_return_val_if_fail(num != 0, -EINVAL);
+
+	result.id = id;
+	result.next = start;
+      next:
+	result.index = result.next++;
+
+	spa_pod_builder_init(&b, buffer, sizeof(buffer));
+
+	switch (id) {
+	case SPA_PARAM_EnumProfile:
+	{
+		switch (result.index) {
+		case 0:
+		case 1:
+			param = build_profile(this, &b, id, result.index);
+			break;
+		default:
+			return 0;
+		}
+		break;
+	}
+	case SPA_PARAM_Profile:
+	{
+		switch (result.index) {
+		case 0:
+			param = build_profile(this, &b, id, this->profile);
+			break;
+		default:
+			return 0;
+		}
+		break;
+	}
+	default:
+		return -ENOENT;
+	}
+
+	if (spa_pod_filter(&b, &result.param, param, filter) < 0)
+		goto next;
+
+	spa_device_emit_result(&this->hooks, seq, 0,
+			SPA_RESULT_TYPE_DEVICE_PARAMS, &result);
+
+	if (++count != num)
+		goto next;
+
+	return 0;
+}
+
+static int impl_set_param(void *object,
+			  uint32_t id, uint32_t flags,
+			  const struct spa_pod *param)
+{
+	struct impl *this = object;
+	int res;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	switch (id) {
+	case SPA_PARAM_Profile:
+	{
+		uint32_t idx;
+
+		if ((res = spa_pod_parse_object(param,
+				SPA_TYPE_OBJECT_ParamProfile, NULL,
+				SPA_PARAM_PROFILE_index, SPA_POD_Int(&idx))) < 0) {
+			spa_log_warn(this->log, "can't parse profile");
+			spa_debug_log_pod(this->log, SPA_LOG_LEVEL_DEBUG, 0, NULL, param);
+			return res;
+		}
+
+		set_profile(this, idx);
+		break;
+	}
+	default:
+		return -ENOENT;
+	}
+	return 0;
+}
+
+static const struct spa_device_methods impl_device = {
+	SPA_VERSION_DEVICE_METHODS,
+	.add_listener = impl_add_listener,
+	.sync = impl_sync,
+	.enum_params = impl_enum_params,
+	.set_param = impl_set_param,
+};
+
+static int impl_get_interface(struct spa_handle *handle, const char *type, void **interface)
+{
+	struct impl *this;
+
+	spa_return_val_if_fail(handle != NULL, -EINVAL);
+	spa_return_val_if_fail(interface != NULL, -EINVAL);
+
+	this = (struct impl *) handle;
+
+	if (spa_streq(type, SPA_TYPE_INTERFACE_Device))
+		*interface = &this->device;
+	else
+		return -ENOENT;
+
+	return 0;
+}
+
+static int impl_clear(struct spa_handle *handle)
+{
+	return 0;
+}
+
+static size_t
+impl_get_size(const struct spa_handle_factory *factory,
+	      const struct spa_dict *params)
+{
+	return sizeof(struct impl);
+}
+
+static int
+impl_init(const struct spa_handle_factory *factory,
+	  struct spa_handle *handle,
+	  const struct spa_dict *info,
+	  const struct spa_support *support,
+	  uint32_t n_support)
+{
+	struct impl *this;
+	const char *str;
+
+	spa_return_val_if_fail(factory != NULL, -EINVAL);
+	spa_return_val_if_fail(handle != NULL, -EINVAL);
+
+	handle->get_interface = impl_get_interface;
+	handle->clear = impl_clear;
+
+	this = (struct impl *) handle;
+
+	this->log = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_Log);
+	alsa_log_topic_init(this->log);
+
+	this->device.iface = SPA_INTERFACE_INIT(
+			SPA_TYPE_INTERFACE_Device,
+			SPA_VERSION_DEVICE,
+			&impl_device, this);
+	spa_hook_list_init(&this->hooks);
+
+	reset_props(&this->props);
+
+	snd_config_update_free_global();
+
+	if (info && (str = spa_dict_lookup(info, SPA_KEY_API_ALSA_PATH)))
+		snprintf(this->props.device, 64, "%s", str);
+
+	return 0;
+}
+
+static const struct spa_interface_info impl_interfaces[] = {
+	{SPA_TYPE_INTERFACE_Device,},
+};
+
+static int
+impl_enum_interface_info(const struct spa_handle_factory *factory,
+			 const struct spa_interface_info **info,
+			 uint32_t *index)
+{
+	spa_return_val_if_fail(factory != NULL, -EINVAL);
+	spa_return_val_if_fail(info != NULL, -EINVAL);
+	spa_return_val_if_fail(index != NULL, -EINVAL);
+
+	if (*index >= SPA_N_ELEMENTS(impl_interfaces))
+		return 0;
+
+	*info = &impl_interfaces[(*index)++];
+	return 1;
+}
+
+const struct spa_handle_factory spa_alsa_device_factory = {
+	SPA_VERSION_HANDLE_FACTORY,
+	SPA_NAME_API_ALSA_PCM_DEVICE,
+	NULL,
+	impl_get_size,
+	impl_init,
+	impl_enum_interface_info,
+};