diff options
Diffstat (limited to 'src/pipewire_audio.c')
| -rw-r--r-- | src/pipewire_audio.c | 420 |
1 files changed, 420 insertions, 0 deletions
diff --git a/src/pipewire_audio.c b/src/pipewire_audio.c new file mode 100644 index 0000000..4f9f05f --- /dev/null +++ b/src/pipewire_audio.c @@ -0,0 +1,420 @@ +#include "../include/pipewire_audio.h" + +#include <pipewire/pipewire.h> + +static void on_core_info_cb(void *user_data, const struct pw_core_info *info) { + gsr_pipewire_audio *self = user_data; + //fprintf(stderr, "server name: %s\n", info->name); +} + +static void on_core_error_cb(void *user_data, uint32_t id, int seq, int res, const char *message) { + gsr_pipewire_audio *self = user_data; + //fprintf(stderr, "gsr error: pipewire: error id:%u seq:%d res:%d: %s\n", id, seq, res, message); + pw_thread_loop_signal(self->thread_loop, false); +} + +static void on_core_done_cb(void *user_data, uint32_t id, int seq) { + gsr_pipewire_audio *self = user_data; + if(id == PW_ID_CORE && self->server_version_sync == seq) + pw_thread_loop_signal(self->thread_loop, false); +} + +static const struct pw_core_events core_events = { + PW_VERSION_CORE_EVENTS, + .info = on_core_info_cb, + .done = on_core_done_cb, + .error = on_core_error_cb, +}; + +static gsr_pipewire_audio_node* gsr_pipewire_audio_get_node_by_name_case_insensitive(gsr_pipewire_audio *self, const char *node_name, gsr_pipewire_audio_node_type node_type) { + for(int i = 0; i < self->num_stream_nodes; ++i) { + const gsr_pipewire_audio_node *node = &self->stream_nodes[i]; + if(node->type == node_type && strcasecmp(node->name, node_name) == 0) + return &self->stream_nodes[i]; + } + return NULL; +} + +static gsr_pipewire_audio_port* gsr_pipewire_audio_get_node_port_by_name(gsr_pipewire_audio *self, uint32_t node_id, const char *port_name) { + for(int i = 0; i < self->num_ports; ++i) { + if(self->ports[i].node_id == node_id && strcmp(self->ports[i].name, port_name) == 0) + return &self->ports[i]; + } + return NULL; +} + +static bool requested_link_matches_name_case_insensitive(const gsr_pipewire_audio_requested_link *requested_link, const char *name) { + for(int i = 0; i < requested_link->num_app_names; ++i) { + if(strcasecmp(requested_link->app_names[i], name) == 0) + return true; + } + return false; +} + +static void gsr_pipewire_audio_create_link(gsr_pipewire_audio *self, const gsr_pipewire_audio_requested_link *requested_link) { + const gsr_pipewire_audio_node_type requested_link_node_type = requested_link->output_type == GSR_PIPEWIRE_AUDIO_LINK_OUTPUT_TYPE_STREAM ? GSR_PIPEWIRE_AUDIO_NODE_TYPE_STREAM_INPUT : GSR_PIPEWIRE_AUDIO_NODE_TYPE_SINK; + const gsr_pipewire_audio_node *stream_input_node = gsr_pipewire_audio_get_node_by_name_case_insensitive(self, requested_link->output_name, requested_link_node_type); + if(!stream_input_node) + return; + + const gsr_pipewire_audio_port *stream_input_fl_port = NULL; + const gsr_pipewire_audio_port *stream_input_fr_port = NULL; + + switch(requested_link->output_type) { + case GSR_PIPEWIRE_AUDIO_LINK_OUTPUT_TYPE_STREAM: { + stream_input_fl_port = gsr_pipewire_audio_get_node_port_by_name(self, stream_input_node->id, "input_FL"); + stream_input_fr_port = gsr_pipewire_audio_get_node_port_by_name(self, stream_input_node->id, "input_FR"); + break; + } + case GSR_PIPEWIRE_AUDIO_LINK_OUTPUT_TYPE_SINK: { + stream_input_fl_port = gsr_pipewire_audio_get_node_port_by_name(self, stream_input_node->id, "playback_FL"); + stream_input_fr_port = gsr_pipewire_audio_get_node_port_by_name(self, stream_input_node->id, "playback_FR"); + break; + } + } + + if(!stream_input_fl_port || !stream_input_fr_port) + return; + + for(int i = 0; i < self->num_stream_nodes; ++i) { + const gsr_pipewire_audio_node *app_node = &self->stream_nodes[i]; + if(app_node->type != GSR_PIPEWIRE_AUDIO_NODE_TYPE_STREAM_OUTPUT) + continue; + + const bool requested_link_matches_app = requested_link_matches_name_case_insensitive(requested_link, app_node->name); + if(requested_link->inverted) { + if(requested_link_matches_app) + continue; + } else { + if(!requested_link_matches_app) + continue; + } + + const gsr_pipewire_audio_port *app_output_fl_port = gsr_pipewire_audio_get_node_port_by_name(self, app_node->id, "output_FL"); + const gsr_pipewire_audio_port *app_output_fr_port = gsr_pipewire_audio_get_node_port_by_name(self, app_node->id, "output_FR"); + if(!app_output_fl_port || !app_output_fr_port) + continue; + + // TODO: Detect if link already exists before so we dont create these proxies when not needed + + //fprintf(stderr, "linking!\n"); + // TODO: error check and cleanup + { + struct pw_properties *props = pw_properties_new(NULL, NULL); + pw_properties_setf(props, PW_KEY_LINK_OUTPUT_PORT, "%u", app_output_fl_port->id); + pw_properties_setf(props, PW_KEY_LINK_INPUT_PORT, "%u", stream_input_fl_port->id); + // TODO: Clean this up when removing node + struct pw_proxy *proxy = pw_core_create_object(self->core, "link-factory", PW_TYPE_INTERFACE_Link, PW_VERSION_LINK, &props->dict, 0); + //self->server_version_sync = pw_core_sync(self->core, PW_ID_CORE, self->server_version_sync); + pw_properties_free(props); + } + + { + struct pw_properties *props = pw_properties_new(NULL, NULL); + pw_properties_setf(props, PW_KEY_LINK_OUTPUT_PORT, "%u", app_output_fr_port->id); + pw_properties_setf(props, PW_KEY_LINK_INPUT_PORT, "%u", stream_input_fr_port->id); + // TODO: Clean this up when removing node + struct pw_proxy *proxy = pw_core_create_object(self->core, "link-factory", PW_TYPE_INTERFACE_Link, PW_VERSION_LINK, &props->dict, 0); + //self->server_version_sync = pw_core_sync(self->core, PW_ID_CORE, self->server_version_sync); + pw_properties_free(props); + } + } +} + +static void gsr_pipewire_audio_create_links(gsr_pipewire_audio *self) { + for(int j = 0; j < self->num_requested_links; ++j) { + gsr_pipewire_audio_create_link(self, &self->requested_links[j]); + } +} + +static void registry_event_global(void *data, uint32_t id, uint32_t permissions, + const char *type, uint32_t version, + const struct spa_dict *props) +{ + //fprintf(stderr, "add: id: %d, type: %s\n", (int)id, type); + if (props == NULL) + return; + + //pw_properties_new_dict(props); + + gsr_pipewire_audio *self = (gsr_pipewire_audio*)data; + if(strcmp(type, PW_TYPE_INTERFACE_Node) == 0) { + const char *node_name = spa_dict_lookup(props, PW_KEY_NODE_NAME); + const char *media_class = spa_dict_lookup(props, PW_KEY_MEDIA_CLASS); + //fprintf(stderr, " node name: %s, media class: %s\n", node_name, media_class); + const bool is_stream_output = media_class && strcmp(media_class, "Stream/Output/Audio") == 0; + const bool is_stream_input = media_class && strcmp(media_class, "Stream/Input/Audio") == 0; + const bool is_sink = media_class && strcmp(media_class, "Audio/Sink") == 0; + if(self->num_stream_nodes < GSR_PIPEWIRE_AUDIO_MAX_STREAM_NODES && node_name && (is_stream_output || is_stream_input || is_sink)) { + //const char *application_binary = spa_dict_lookup(props, PW_KEY_APP_PROCESS_BINARY); + //const char *application_name = spa_dict_lookup(props, PW_KEY_APP_NAME); + //fprintf(stderr, " node name: %s, app binary: %s, app name: %s\n", node_name, application_binary, application_name); + + char *node_name_copy = strdup(node_name); + if(node_name_copy) { + self->stream_nodes[self->num_stream_nodes].id = id; + self->stream_nodes[self->num_stream_nodes].name = node_name_copy; + if(is_stream_output) + self->stream_nodes[self->num_stream_nodes].type = GSR_PIPEWIRE_AUDIO_NODE_TYPE_STREAM_OUTPUT; + else if(is_stream_input) + self->stream_nodes[self->num_stream_nodes].type = GSR_PIPEWIRE_AUDIO_NODE_TYPE_STREAM_INPUT; + else if(is_sink) + self->stream_nodes[self->num_stream_nodes].type = GSR_PIPEWIRE_AUDIO_NODE_TYPE_SINK; + ++self->num_stream_nodes; + + gsr_pipewire_audio_create_links(self); + } + } + } else if(strcmp(type, PW_TYPE_INTERFACE_Port) == 0) { + const char *port_name = spa_dict_lookup(props, PW_KEY_PORT_NAME); + + const char *port_direction = spa_dict_lookup(props, PW_KEY_PORT_DIRECTION); + gsr_pipewire_audio_port_direction direction = -1; + if(port_direction && strcmp(port_direction, "in") == 0) + direction = GSR_PIPEWIRE_AUDIO_PORT_DIRECTION_INPUT; + else if(port_direction && strcmp(port_direction, "out") == 0) + direction = GSR_PIPEWIRE_AUDIO_PORT_DIRECTION_OUTPUT; + + const char *node_id = spa_dict_lookup(props, PW_KEY_NODE_ID); + const int node_id_num = node_id ? atoi(node_id) : 0; + + if(self->num_ports < GSR_PIPEWIRE_AUDIO_MAX_PORTS && port_name && direction >= 0 && node_id_num > 0) { + //fprintf(stderr, " port name: %s, node id: %d, direction: %s\n", port_name, node_id_num, port_direction); + char *port_name_copy = strdup(port_name); + if(port_name_copy) { + self->ports[self->num_ports].id = id; + self->ports[self->num_ports].node_id = node_id_num; + self->ports[self->num_ports].direction = direction; + self->ports[self->num_ports].name = port_name_copy; + ++self->num_ports; + + gsr_pipewire_audio_create_links(self); + } + } + } +} + +static bool gsr_pipewire_audio_remove_node_by_id(gsr_pipewire_audio *self, uint32_t node_id) { + for(int i = 0; i < self->num_stream_nodes; ++i) { + if(self->stream_nodes[i].id != node_id) + continue; + + free(self->stream_nodes[i].name); + for(int j = i + 1; j < self->num_stream_nodes; ++j) { + self->stream_nodes[j - 1] = self->stream_nodes[j]; + } + --self->num_stream_nodes; + return true; + } + return false; +} + +static bool gsr_pipewire_audio_remove_port_by_id(gsr_pipewire_audio *self, uint32_t port_id) { + for(int i = 0; i < self->num_ports; ++i) { + if(self->ports[i].id != port_id) + continue; + + free(self->ports[i].name); + for(int j = i + 1; j < self->num_ports; ++j) { + self->ports[j - 1] = self->ports[j]; + } + --self->num_ports; + return true; + } + return false; +} + +static void registry_event_global_remove(void *data, uint32_t id) { + //fprintf(stderr, "remove: %d\n", (int)id); + gsr_pipewire_audio *self = (gsr_pipewire_audio*)data; + if(gsr_pipewire_audio_remove_node_by_id(self, id)) { + //fprintf(stderr, "removed node\n"); + return; + } + + if(gsr_pipewire_audio_remove_port_by_id(self, id)) { + //fprintf(stderr, "removed port\n"); + return; + } +} + +static const struct pw_registry_events registry_events = { + PW_VERSION_REGISTRY_EVENTS, + .global = registry_event_global, + .global_remove = registry_event_global_remove, +}; + +bool gsr_pipewire_audio_init(gsr_pipewire_audio *self) { + memset(self, 0, sizeof(*self)); + + pw_init(NULL, NULL); + + self->thread_loop = pw_thread_loop_new("gsr screen capture", NULL); + if(!self->thread_loop) { + fprintf(stderr, "gsr error: gsr_pipewire_video_setup_stream: failed to create pipewire thread\n"); + gsr_pipewire_audio_deinit(self); + return false; + } + + self->context = pw_context_new(pw_thread_loop_get_loop(self->thread_loop), NULL, 0); + if(!self->context) { + fprintf(stderr, "gsr error: gsr_pipewire_video_setup_stream: failed to create pipewire context\n"); + gsr_pipewire_audio_deinit(self); + return false; + } + + if(pw_thread_loop_start(self->thread_loop) < 0) { + fprintf(stderr, "gsr error: gsr_pipewire_video_setup_stream: failed to start thread\n"); + gsr_pipewire_audio_deinit(self); + return false; + } + + pw_thread_loop_lock(self->thread_loop); + + self->core = pw_context_connect(self->context, pw_properties_new(PW_KEY_REMOTE_NAME, NULL, NULL), 0); + if(!self->core) { + pw_thread_loop_unlock(self->thread_loop); + gsr_pipewire_audio_deinit(self); + return false; + } + + // TODO: Error check + pw_core_add_listener(self->core, &self->core_listener, &core_events, self); + + self->registry = pw_core_get_registry(self->core, PW_VERSION_REGISTRY, 0); + pw_registry_add_listener(self->registry, &self->registry_listener, ®istry_events, self); + + self->server_version_sync = pw_core_sync(self->core, PW_ID_CORE, 0); + pw_thread_loop_wait(self->thread_loop); + + pw_thread_loop_unlock(self->thread_loop); + return true; +} + +void gsr_pipewire_audio_deinit(gsr_pipewire_audio *self) { + if(self->thread_loop) { + //pw_thread_loop_wait(self->thread_loop); + pw_thread_loop_stop(self->thread_loop); + } + + if(self->core) { + pw_core_disconnect(self->core); + self->core = NULL; + } + + if(self->context) { + pw_context_destroy(self->context); + self->context = NULL; + } + + if(self->thread_loop) { + pw_thread_loop_destroy(self->thread_loop); + self->thread_loop = NULL; + } + + for(int i = 0; i < self->num_stream_nodes; ++i) { + free(self->stream_nodes[i].name); + } + self->num_stream_nodes = 0; + + for(int i = 0; i < self->num_ports; ++i) { + free(self->ports[i].name); + } + self->num_ports = 0; + + for(int i = 0; i < self->num_requested_links; ++i) { + for(int j = 0; j < self->requested_links[i].num_app_names; ++j) { + free(self->requested_links[i].app_names[j]); + } + free(self->requested_links[i].app_names); + free(self->requested_links[i].output_name); + } + self->num_requested_links = 0; + +#if PW_CHECK_VERSION(0, 3, 49) + pw_deinit(); +#endif +} + +static bool gsr_pipewire_audio_add_link_from_apps_to_output(gsr_pipewire_audio *self, const char **app_names_output, int num_app_names_output, const char *output_name, gsr_pipewire_audio_link_output_type output_type, bool inverted) { + if(self->num_requested_links >= GSR_PIPEWIRE_AUDIO_MAX_REQUESTED_LINKS) + return false; + + char **app_names_output_copy = calloc(num_app_names_output, sizeof(char*)); + if(!app_names_output_copy) + return false; + + char *output_name_copy = strdup(output_name); + if(!output_name_copy) + goto error; + + for(int i = 0; i < num_app_names_output; ++i) { + app_names_output_copy[i] = strdup(app_names_output[i]); + if(!app_names_output_copy[i]) + goto error; + } + + pw_thread_loop_lock(self->thread_loop); + self->requested_links[self->num_requested_links].app_names = app_names_output_copy; + self->requested_links[self->num_requested_links].num_app_names = num_app_names_output; + self->requested_links[self->num_requested_links].output_name = output_name_copy; + self->requested_links[self->num_requested_links].output_type = output_type; + self->requested_links[self->num_requested_links].inverted = inverted; + ++self->num_requested_links; + gsr_pipewire_audio_create_link(self, &self->requested_links[self->num_requested_links - 1]); + pw_thread_loop_unlock(self->thread_loop); + + return true; + + error: + free(output_name_copy); + for(int i = 0; i < num_app_names_output; ++i) { + free(app_names_output_copy[i]); + } + free(app_names_output_copy); + return false; +} + +bool gsr_pipewire_audio_add_link_from_apps_to_stream(gsr_pipewire_audio *self, const char **app_names_output, int num_app_names_output, const char *stream_name_input) { + return gsr_pipewire_audio_add_link_from_apps_to_output(self, app_names_output, num_app_names_output, stream_name_input, GSR_PIPEWIRE_AUDIO_LINK_OUTPUT_TYPE_STREAM, false); +} + +bool gsr_pipewire_audio_add_link_from_apps_to_stream_inverted(gsr_pipewire_audio *self, const char **app_names_output, int num_app_names_output, const char *stream_name_input) { + return gsr_pipewire_audio_add_link_from_apps_to_output(self, app_names_output, num_app_names_output, stream_name_input, GSR_PIPEWIRE_AUDIO_LINK_OUTPUT_TYPE_STREAM, true); +} + +bool gsr_pipewire_audio_add_link_from_apps_to_sink(gsr_pipewire_audio *self, const char **app_names_output, int num_app_names_output, const char *sink_name_input) { + return gsr_pipewire_audio_add_link_from_apps_to_output(self, app_names_output, num_app_names_output, sink_name_input, GSR_PIPEWIRE_AUDIO_LINK_OUTPUT_TYPE_SINK, false); +} + +bool gsr_pipewire_audio_add_link_from_apps_to_sink_inverted(gsr_pipewire_audio *self, const char **app_names_output, int num_app_names_output, const char *sink_name_input) { + return gsr_pipewire_audio_add_link_from_apps_to_output(self, app_names_output, num_app_names_output, sink_name_input, GSR_PIPEWIRE_AUDIO_LINK_OUTPUT_TYPE_SINK, true); +} + +void gsr_pipewire_audio_for_each_app(gsr_pipewire_audio *self, gsr_pipewire_audio_app_query_callback callback, void *userdata) { + pw_thread_loop_lock(self->thread_loop); + for(int i = 0; i < self->num_stream_nodes; ++i) { + const gsr_pipewire_audio_node *node = &self->stream_nodes[i]; + if(node->type != GSR_PIPEWIRE_AUDIO_NODE_TYPE_STREAM_OUTPUT) + continue; + + bool duplicate_app = false; + for(int j = i - 1; j >= 0; --j) { + const gsr_pipewire_audio_node *prev_node = &self->stream_nodes[j]; + if(prev_node->type != GSR_PIPEWIRE_AUDIO_NODE_TYPE_STREAM_OUTPUT) + continue; + + if(strcasecmp(node->name, prev_node->name) == 0) { + duplicate_app = true; + break; + } + } + + if(duplicate_app) + continue; + + if(!callback(node->name, userdata)) + break; + } + pw_thread_loop_unlock(self->thread_loop); +} |