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https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2025-11-03 09:01:54 -05:00
media-session: Add module to load/save default nodes
Nodes are stored with their (unique) name and restored with their ID on the metadata.
This commit is contained in:
Wim Taymans
parent
8a4dd83883
commit
efdeceddab
3 changed files with 290 additions and 1 deletions
286
src/examples/media-session/default-nodes.c
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286
src/examples/media-session/default-nodes.c
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/* PipeWire
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*
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* Copyright © 2020 Wim Taymans
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <string.h>
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#include <stdio.h>
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#include <errno.h>
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#include <math.h>
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#include <time.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "config.h"
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#include <spa/utils/hook.h>
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#include <spa/utils/result.h>
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#include <spa/debug/pod.h>
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#include "pipewire/pipewire.h"
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#include "extensions/metadata.h"
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#include "media-session.h"
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#define NAME "default-nodes"
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#define SESSION_KEY "default-nodes"
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#define SAVE_INTERVAL 5
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struct impl {
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struct timespec now;
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struct sm_media_session *session;
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struct spa_hook listener;
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struct pw_context *context;
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struct spa_source *idle_timeout;
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struct spa_hook meta_listener;
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uint32_t default_audio_source;
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uint32_t default_audio_sink;
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uint32_t default_video_source;
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struct pw_properties *properties;
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};
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struct find_data {
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struct impl *impl;
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const char *name;
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uint32_t id;
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};
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static int find_name(void *data, struct sm_object *object)
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{
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struct find_data *d = data;
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const char *str;
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if (strcmp(object->type, PW_TYPE_INTERFACE_Node) == 0 &&
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object->props &&
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(str = pw_properties_get(object->props, PW_KEY_NODE_NAME)) != NULL &&
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strcmp(str, d->name) == 0) {
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d->id = object->id;
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return 1;
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}
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return 0;
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}
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#if 0
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static uint32_t find_id_for_name(struct impl *impl, const char *name)
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{
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struct find_data d = { impl, name, SPA_ID_INVALID };
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sm_media_session_for_each_object(impl->session, find_name, &d);
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return d.id;
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}
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#endif
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static const char *find_name_for_id(struct impl *impl, uint32_t id)
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{
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struct sm_object *obj;
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const char *str;
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if (id == SPA_ID_INVALID)
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return NULL;
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obj = sm_media_session_find_object(impl->session, id);
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if (obj == NULL)
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return NULL;
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if (strcmp(obj->type, PW_TYPE_INTERFACE_Node) == 0 &&
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obj->props &&
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(str = pw_properties_get(obj->props, PW_KEY_NODE_NAME)) != NULL)
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return str;
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return NULL;
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}
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static int load_state(struct impl *impl)
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{
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int res;
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if ((res = sm_media_session_load_state(impl->session, SESSION_KEY, impl->properties)) < 0) {
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pw_log_error("can't load "SESSION_KEY" state: %s", spa_strerror(res));
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return res;
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}
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return res;
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}
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static int save_state(struct impl *impl)
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{
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int res;
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if ((res = sm_media_session_save_state(impl->session, SESSION_KEY, impl->properties)) < 0) {
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pw_log_error("can't save "SESSION_KEY" state: %s", spa_strerror(res));
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return res;
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}
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return res;
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}
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static void remove_idle_timeout(struct impl *impl)
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{
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struct pw_loop *main_loop = pw_context_get_main_loop(impl->context);
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if (impl->idle_timeout) {
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pw_loop_destroy_source(main_loop, impl->idle_timeout);
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impl->idle_timeout = NULL;
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}
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}
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static void idle_timeout(void *data, uint64_t expirations)
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{
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struct impl *impl = data;
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pw_log_debug(NAME " %p: idle timeout", impl);
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remove_idle_timeout(impl);
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save_state(impl);
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}
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static void add_idle_timeout(struct impl *impl)
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{
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struct timespec value;
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struct pw_loop *main_loop = pw_context_get_main_loop(impl->context);
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if (impl->idle_timeout == NULL)
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impl->idle_timeout = pw_loop_add_timer(main_loop, idle_timeout, impl);
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value.tv_sec = SAVE_INTERVAL;
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value.tv_nsec = 0;
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pw_loop_update_timer(main_loop, impl->idle_timeout, &value, NULL, false);
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}
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static int metadata_property(void *object, uint32_t subject,
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const char *key, const char *type, const char *value)
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{
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struct impl *impl = object;
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uint32_t val;
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bool changed = false;
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if (key == NULL)
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return 0;
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if (subject == PW_ID_CORE) {
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val = value ? (uint32_t)atoi(value) : SPA_ID_INVALID;
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if (strcmp(key, "default.audio.sink") == 0) {
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changed = val != impl->default_audio_sink;
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impl->default_audio_sink = val;
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} else if (strcmp(key, "default.audio.source") == 0) {
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changed = val != impl->default_audio_source;
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impl->default_audio_source = val;
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} else if (strcmp(key, "default.video.source") == 0) {
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changed = val != impl->default_video_source;
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impl->default_video_source = val;
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}
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}
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if (changed) {
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const char *name = find_name_for_id(impl, val);
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pw_properties_set(impl->properties, key, name);
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add_idle_timeout(impl);
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}
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return 0;
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}
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static const struct pw_metadata_events metadata_events = {
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PW_VERSION_METADATA_EVENTS,
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.property = metadata_property,
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};
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static void session_destroy(void *data)
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{
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struct impl *impl = data;
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spa_hook_remove(&impl->listener);
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pw_properties_free(impl->properties);
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free(impl);
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}
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static void session_create(void *data, struct sm_object *object)
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{
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struct impl *impl = data;
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const struct spa_dict_item *it;
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if (strcmp(object->type, PW_TYPE_INTERFACE_Node) != 0)
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return;
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spa_dict_for_each(it, &impl->properties->dict) {
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struct find_data d = { impl, it->value, SPA_ID_INVALID };
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if (find_name(&d, object)) {
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char val[16];
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snprintf(val, sizeof(val)-1, "%u", d.id);
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pw_metadata_set_property(impl->session->metadata,
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PW_ID_CORE, it->key, SPA_TYPE_INFO_BASE"Id", val);
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}
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}
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}
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static void session_remove(void *data, struct sm_object *object)
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{
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struct impl *impl = data;
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if (strcmp(object->type, PW_TYPE_INTERFACE_Node) != 0)
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return;
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if (impl->default_audio_sink == object->id)
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impl->default_audio_sink = SPA_ID_INVALID;
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if (impl->default_audio_source == object->id)
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impl->default_audio_source = SPA_ID_INVALID;
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if (impl->default_video_source == object->id)
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impl->default_video_source = SPA_ID_INVALID;
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}
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static const struct sm_media_session_events session_events = {
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SM_VERSION_MEDIA_SESSION_EVENTS,
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.create = session_create,
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.remove = session_remove,
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.destroy = session_destroy,
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};
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int sm_default_nodes_start(struct sm_media_session *session)
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{
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struct impl *impl;
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impl = calloc(1, sizeof(struct impl));
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if (impl == NULL)
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return -errno;
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impl->session = session;
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impl->context = session->context;
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impl->default_audio_sink = SPA_ID_INVALID;
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impl->default_audio_source = SPA_ID_INVALID;
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impl->default_video_source = SPA_ID_INVALID;
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impl->properties = pw_properties_new(NULL, NULL);
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if (impl->properties == NULL) {
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free(impl);
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return -ENOMEM;
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}
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load_state(impl);
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sm_media_session_add_listener(impl->session, &impl->listener, &session_events, impl);
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if (session->metadata) {
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pw_metadata_add_listener(session->metadata,
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&impl->meta_listener,
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&metadata_events, impl);
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}
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return 0;
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}
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@ -77,6 +77,7 @@
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int sm_access_flatpak_start(struct sm_media_session *sess);
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int sm_access_portal_start(struct sm_media_session *sess);
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int sm_metadata_start(struct sm_media_session *sess);
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int sm_default_nodes_start(struct sm_media_session *sess);
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int sm_alsa_midi_start(struct sm_media_session *sess);
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int sm_v4l2_monitor_start(struct sm_media_session *sess);
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int sm_libcamera_monitor_start(struct sm_media_session *sess);
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@ -1988,7 +1989,7 @@ static void do_quit(void *data, int signal_number)
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pw_main_loop_quit(impl->loop);
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}
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#define DEFAULT_ENABLED "flatpak,portal,metadata,alsa-acp,alsa-seq,v4l2,bluez5,suspend-node,policy-node"
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#define DEFAULT_ENABLED "flatpak,portal,metadata,default-nodes,alsa-acp,alsa-seq,v4l2,bluez5,suspend-node,policy-node"
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#define DEFAULT_DISABLED ""
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static const struct {
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@ -2001,6 +2002,7 @@ static const struct {
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{ "flatpak", "manage flatpak access", sm_access_flatpak_start, NULL },
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{ "portal", "manage portal permissions", sm_access_portal_start, NULL },
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{ "metadata", "export metadata API", sm_metadata_start, NULL },
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{ "default-nodes", "restore default nodes", sm_default_nodes_start, NULL },
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{ "alsa-seq", "alsa seq midi support", sm_alsa_midi_start, NULL },
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{ "alsa-pcm", "alsa pcm udev detection", sm_alsa_monitor_start, NULL },
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{ "alsa-acp", "alsa card profile udev detection", sm_alsa_monitor_start, "alsa.use-acp=true" },
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@ -74,6 +74,7 @@ if alsa_dep.found()
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'media-session/alsa-endpoint.c',
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'media-session/bluez-monitor.c',
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'media-session/bluez-endpoint.c',
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'media-session/default-nodes.c',
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'media-session/media-session.c',
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'media-session/session-manager.c',
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'media-session/metadata.c',
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