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-rw-r--r--src/modules/module-raop-discover.c547
1 files changed, 547 insertions, 0 deletions
diff --git a/src/modules/module-raop-discover.c b/src/modules/module-raop-discover.c
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index 0000000..0c62011
--- /dev/null
+++ b/src/modules/module-raop-discover.c
@@ -0,0 +1,547 @@
+/* PipeWire
+ *
+ * Copyright © 2021 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 <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "config.h"
+
+#include <spa/utils/result.h>
+#include <spa/utils/string.h>
+#include <spa/utils/json.h>
+
+#include <pipewire/impl.h>
+#include <pipewire/i18n.h>
+
+#include <avahi-client/lookup.h>
+#include <avahi-common/error.h>
+#include <avahi-common/malloc.h>
+
+#include "module-protocol-pulse/format.h"
+#include "module-zeroconf-discover/avahi-poll.h"
+
+/** \page page_module_raop_discover PipeWire Module: RAOP Discover
+ *
+ * Automatically creates RAOP (Airplay) sink devices based on zeroconf
+ * information.
+ *
+ * This module will load module-raop-sink for each discovered sink
+ * with the right parameters.
+ *
+ * ## Module Options
+ *
+ * This module has no options.
+ *
+ * ## Example configuration
+ *
+ *\code{.unparsed}
+ * context.modules = [
+ * { name = libpipewire-raop-discover
+ * args = { }
+ * }
+ * ]
+ *\endcode
+ *
+ * ## See also
+ *
+ * \ref page_module_raop_sink
+ */
+
+#define NAME "raop-discover"
+
+PW_LOG_TOPIC_STATIC(mod_topic, "mod." NAME);
+#define PW_LOG_TOPIC_DEFAULT mod_topic
+
+#define MODULE_USAGE " "
+
+static const struct spa_dict_item module_props[] = {
+ { PW_KEY_MODULE_AUTHOR, "Wim Taymans <wim.taymans@gmail.com>" },
+ { PW_KEY_MODULE_DESCRIPTION, "Discover remote streams" },
+ { PW_KEY_MODULE_USAGE, MODULE_USAGE },
+ { PW_KEY_MODULE_VERSION, PACKAGE_VERSION },
+};
+
+#define SERVICE_TYPE_SINK "_raop._tcp"
+
+struct impl {
+ struct pw_context *context;
+
+ struct pw_impl_module *module;
+ struct spa_hook module_listener;
+
+ struct pw_properties *properties;
+
+ AvahiPoll *avahi_poll;
+ AvahiClient *client;
+ AvahiServiceBrowser *sink_browser;
+
+ struct spa_list tunnel_list;
+};
+
+struct tunnel_info {
+ AvahiIfIndex interface;
+ AvahiProtocol protocol;
+ const char *name;
+ const char *type;
+ const char *domain;
+};
+
+#define TUNNEL_INFO(...) ((struct tunnel_info){ __VA_ARGS__ })
+
+struct tunnel {
+ struct spa_list link;
+ struct tunnel_info info;
+ struct pw_impl_module *module;
+ struct spa_hook module_listener;
+};
+
+static int start_client(struct impl *impl);
+
+static struct tunnel *make_tunnel(struct impl *impl, const struct tunnel_info *info)
+{
+ struct tunnel *t;
+
+ t = calloc(1, sizeof(*t));
+ if (t == NULL)
+ return NULL;
+
+ t->info.interface = info->interface;
+ t->info.protocol = info->protocol;
+ t->info.name = strdup(info->name);
+ t->info.type = strdup(info->type);
+ t->info.domain = strdup(info->domain);
+ spa_list_append(&impl->tunnel_list, &t->link);
+
+ return t;
+}
+
+static struct tunnel *find_tunnel(struct impl *impl, const struct tunnel_info *info)
+{
+ struct tunnel *t;
+ spa_list_for_each(t, &impl->tunnel_list, link) {
+ if (t->info.interface == info->interface &&
+ t->info.protocol == info->protocol &&
+ spa_streq(t->info.name, info->name) &&
+ spa_streq(t->info.type, info->type) &&
+ spa_streq(t->info.domain, info->domain))
+ return t;
+ }
+ return NULL;
+}
+
+static void free_tunnel(struct tunnel *t)
+{
+ pw_impl_module_destroy(t->module);
+}
+
+static void impl_free(struct impl *impl)
+{
+ struct tunnel *t;
+
+ spa_list_consume(t, &impl->tunnel_list, link)
+ free_tunnel(t);
+
+ if (impl->sink_browser)
+ avahi_service_browser_free(impl->sink_browser);
+ if (impl->client)
+ avahi_client_free(impl->client);
+ if (impl->avahi_poll)
+ pw_avahi_poll_free(impl->avahi_poll);
+ pw_properties_free(impl->properties);
+ free(impl);
+}
+
+static void module_destroy(void *data)
+{
+ struct impl *impl = data;
+ spa_hook_remove(&impl->module_listener);
+ impl_free(impl);
+}
+
+static const struct pw_impl_module_events module_events = {
+ PW_VERSION_IMPL_MODULE_EVENTS,
+ .destroy = module_destroy,
+};
+
+static bool str_in_list(const char *haystack, const char *delimiters, const char *needle)
+{
+ const char *s, *state = NULL;
+ size_t len;
+ while ((s = pw_split_walk(haystack, delimiters, &len, &state))) {
+ if (spa_strneq(needle, s, len))
+ return true;
+ }
+ return false;
+}
+
+static void pw_properties_from_avahi_string(const char *key, const char *value,
+ struct pw_properties *props)
+{
+ if (spa_streq(key, "device")) {
+ pw_properties_set(props, "raop.device", value);
+ }
+ else if (spa_streq(key, "tp")) {
+ /* transport protocol, "UDP", "TCP", "UDP,TCP" */
+ if (str_in_list(value, ",", "UDP"))
+ value = "udp";
+ else if (str_in_list(value, ",", "TCP"))
+ value = "tcp";
+ pw_properties_set(props, "raop.transport", value);
+ } else if (spa_streq(key, "et")) {
+ /* Supported encryption types:
+ * 0 = none,
+ * 1 = RSA,
+ * 2 = FairPlay,
+ * 3 = MFiSAP,
+ * 4 = FairPlay SAPv2.5. */
+ if (str_in_list(value, ",", "1"))
+ value = "RSA";
+ else if (str_in_list(value, ",", "4"))
+ value = "auth_setup";
+ else
+ value = "none";
+ pw_properties_set(props, "raop.encryption.type", value);
+ } else if (spa_streq(key, "cn")) {
+ /* Suported audio codecs:
+ * 0 = PCM,
+ * 1 = ALAC,
+ * 2 = AAC,
+ * 3 = AAC ELD. */
+ if (str_in_list(value, ",", "0"))
+ value = "PCM";
+ else if (str_in_list(value, ",", "1"))
+ value = "ALAC";
+ else if (str_in_list(value, ",", "2"))
+ value = "AAC";
+ else if (str_in_list(value, ",", "2"))
+ value = "AAC-ELD";
+ else
+ value = "unknown";
+ pw_properties_set(props, "raop.audio.codec", value);
+ } else if (spa_streq(key, "ch")) {
+ /* Number of channels */
+ pw_properties_set(props, PW_KEY_AUDIO_CHANNELS, value);
+ } else if (spa_streq(key, "ss")) {
+ /* Sample size */
+ if (spa_streq(value, "16"))
+ value = "S16";
+ else if (spa_streq(value, "24"))
+ value = "S24";
+ else if (spa_streq(value, "32"))
+ value = "S32";
+ else
+ value = "UNKNOWN";
+ pw_properties_set(props, PW_KEY_AUDIO_FORMAT, value);
+ } else if (spa_streq(key, "sr")) {
+ /* Sample rate */
+ pw_properties_set(props, PW_KEY_AUDIO_RATE, value);
+ } else if (spa_streq(key, "am")) {
+ /* Device model */
+ pw_properties_set(props, "device.model", value);
+ }
+}
+
+static void submodule_destroy(void *data)
+{
+ struct tunnel *t = data;
+
+ spa_list_remove(&t->link);
+ spa_hook_remove(&t->module_listener);
+
+ free((char *) t->info.name);
+ free((char *) t->info.type);
+ free((char *) t->info.domain);
+
+ free(t);
+}
+
+static const struct pw_impl_module_events submodule_events = {
+ PW_VERSION_IMPL_MODULE_EVENTS,
+ .destroy = submodule_destroy,
+};
+
+static void resolver_cb(AvahiServiceResolver *r, AvahiIfIndex interface, AvahiProtocol protocol,
+ AvahiResolverEvent event, const char *name, const char *type, const char *domain,
+ const char *host_name, const AvahiAddress *a, uint16_t port, AvahiStringList *txt,
+ AvahiLookupResultFlags flags, void *userdata)
+{
+ struct impl *impl = userdata;
+ struct tunnel *t;
+ struct tunnel_info tinfo;
+ const char *str;
+ AvahiStringList *l;
+ FILE *f;
+ char *args;
+ size_t size;
+ struct pw_impl_module *mod;
+ struct pw_properties *props = NULL;
+ char at[AVAHI_ADDRESS_STR_MAX];
+
+ if (event != AVAHI_RESOLVER_FOUND) {
+ pw_log_error("Resolving of '%s' failed: %s", name,
+ avahi_strerror(avahi_client_errno(impl->client)));
+ goto done;
+ }
+ tinfo = TUNNEL_INFO(.interface = interface,
+ .protocol = protocol,
+ .name = name,
+ .type = type,
+ .domain = domain);
+
+ props = pw_properties_new(NULL, NULL);
+ if (props == NULL) {
+ pw_log_error("Can't allocate properties: %m");
+ goto done;
+ }
+
+ avahi_address_snprint(at, sizeof(at), a);
+
+ pw_properties_setf(props, "raop.hostname", "%s", at);
+ pw_properties_setf(props, "raop.port", "%u", port);
+
+ if ((str = strstr(name, "@"))) {
+ str++;
+ if (strlen(str) > 0)
+ pw_properties_set(props, PW_KEY_NODE_DESCRIPTION, str);
+ else
+ pw_properties_setf(props, PW_KEY_NODE_DESCRIPTION,
+ "RAOP on %s", host_name);
+ }
+
+ for (l = txt; l; l = l->next) {
+ char *key, *value;
+
+ if (avahi_string_list_get_pair(l, &key, &value, NULL) != 0)
+ break;
+
+ pw_properties_from_avahi_string(key, value, props);
+ avahi_free(key);
+ avahi_free(value);
+ }
+
+
+ if ((f = open_memstream(&args, &size)) == NULL) {
+ pw_log_error("Can't open memstream: %m");
+ goto done;
+ }
+
+ fprintf(f, "{");
+ pw_properties_serialize_dict(f, &props->dict, 0);
+ fprintf(f, " stream.props = {");
+ fprintf(f, " }");
+ fprintf(f, "}");
+ fclose(f);
+
+ pw_properties_free(props);
+
+ pw_log_info("loading module args:'%s'", args);
+ mod = pw_context_load_module(impl->context,
+ "libpipewire-module-raop-sink",
+ args, NULL);
+ free(args);
+
+ if (mod == NULL) {
+ pw_log_error("Can't load module: %m");
+ goto done;
+ }
+
+ t = make_tunnel(impl, &tinfo);
+ if (t == NULL) {
+ pw_log_error("Can't make tunnel: %m");
+ pw_impl_module_destroy(mod);
+ goto done;
+ }
+
+ pw_impl_module_add_listener(mod, &t->module_listener, &submodule_events, t);
+
+ t->module = mod;
+
+done:
+ avahi_service_resolver_free(r);
+}
+
+
+static void browser_cb(AvahiServiceBrowser *b, AvahiIfIndex interface, AvahiProtocol protocol,
+ AvahiBrowserEvent event, const char *name, const char *type, const char *domain,
+ AvahiLookupResultFlags flags, void *userdata)
+{
+ struct impl *impl = userdata;
+ struct tunnel_info info;
+ struct tunnel *t;
+
+ if (flags & AVAHI_LOOKUP_RESULT_LOCAL)
+ return;
+
+ info = TUNNEL_INFO(.interface = interface,
+ .protocol = protocol,
+ .name = name,
+ .type = type,
+ .domain = domain);
+
+ t = find_tunnel(impl, &info);
+
+ switch (event) {
+ case AVAHI_BROWSER_NEW:
+ if (t != NULL)
+ return;
+ if (!(avahi_service_resolver_new(impl->client,
+ interface, protocol,
+ name, type, domain,
+ AVAHI_PROTO_UNSPEC, 0,
+ resolver_cb, impl)))
+ pw_log_error("can't make service resolver: %s",
+ avahi_strerror(avahi_client_errno(impl->client)));
+ break;
+ case AVAHI_BROWSER_REMOVE:
+ if (t == NULL)
+ return;
+ free_tunnel(t);
+ break;
+ default:
+ break;
+ }
+}
+
+
+static struct AvahiServiceBrowser *make_browser(struct impl *impl, const char *service_type)
+{
+ struct AvahiServiceBrowser *s;
+
+ s = avahi_service_browser_new(impl->client,
+ AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
+ service_type, NULL, 0,
+ browser_cb, impl);
+ if (s == NULL) {
+ pw_log_error("can't make browser for %s: %s", service_type,
+ avahi_strerror(avahi_client_errno(impl->client)));
+ }
+ return s;
+}
+
+static void client_callback(AvahiClient *c, AvahiClientState state, void *userdata)
+{
+ struct impl *impl = userdata;
+
+ impl->client = c;
+
+ switch (state) {
+ case AVAHI_CLIENT_S_REGISTERING:
+ case AVAHI_CLIENT_S_RUNNING:
+ case AVAHI_CLIENT_S_COLLISION:
+ if (impl->sink_browser == NULL)
+ impl->sink_browser = make_browser(impl, SERVICE_TYPE_SINK);
+ if (impl->sink_browser == NULL)
+ goto error;
+ break;
+ case AVAHI_CLIENT_FAILURE:
+ if (avahi_client_errno(c) == AVAHI_ERR_DISCONNECTED)
+ start_client(impl);
+
+ SPA_FALLTHROUGH;
+ case AVAHI_CLIENT_CONNECTING:
+ if (impl->sink_browser) {
+ avahi_service_browser_free(impl->sink_browser);
+ impl->sink_browser = NULL;
+ }
+ break;
+ default:
+ break;
+ }
+ return;
+error:
+ pw_impl_module_schedule_destroy(impl->module);
+}
+
+static int start_client(struct impl *impl)
+{
+ int res;
+ if ((impl->client = avahi_client_new(impl->avahi_poll,
+ AVAHI_CLIENT_NO_FAIL,
+ client_callback, impl,
+ &res)) == NULL) {
+ pw_log_error("can't create client: %s", avahi_strerror(res));
+ pw_impl_module_schedule_destroy(impl->module);
+ return -EIO;
+ }
+ return 0;
+}
+
+static int start_avahi(struct impl *impl)
+{
+ struct pw_loop *loop;
+
+ loop = pw_context_get_main_loop(impl->context);
+ impl->avahi_poll = pw_avahi_poll_new(loop);
+
+ return start_client(impl);
+}
+
+SPA_EXPORT
+int pipewire__module_init(struct pw_impl_module *module, const char *args)
+{
+ struct pw_context *context = pw_impl_module_get_context(module);
+ struct pw_properties *props;
+ struct impl *impl;
+ int res;
+
+ PW_LOG_TOPIC_INIT(mod_topic);
+
+ impl = calloc(1, sizeof(struct impl));
+ if (impl == NULL)
+ goto error_errno;
+
+ pw_log_debug("module %p: new %s", impl, args);
+
+ if (args == NULL)
+ args = "";
+
+ props = pw_properties_new_string(args);
+ if (props == NULL)
+ goto error_errno;
+
+ spa_list_init(&impl->tunnel_list);
+
+ impl->module = module;
+ impl->context = context;
+ impl->properties = props;
+
+ pw_impl_module_add_listener(module, &impl->module_listener, &module_events, impl);
+
+ pw_impl_module_update_properties(module, &SPA_DICT_INIT_ARRAY(module_props));
+
+ start_avahi(impl);
+
+ return 0;
+
+error_errno:
+ res = -errno;
+ if (impl)
+ impl_free(impl);
+ return res;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-11 10:18:04 +0000