mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2025-11-03 09:01:54 -05:00
pulse-server: add virtual-sink and virtual-source
Although those are example elements, they actually work and we can implement them as well.
This commit is contained in:
Wim Taymans
parent
b9789e36cd
commit
989c61e8a1
2 changed files with 367 additions and 0 deletions
179
src/modules/module-protocol-pulse/modules/module-virtual-sink.c
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179
src/modules/module-protocol-pulse/modules/module-virtual-sink.c
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/* PipeWire */
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/* SPDX-FileCopyrightText: Copyright © 2023 Wim Taymans <wim.taymans@gmail.com> */
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/* SPDX-License-Identifier: MIT */
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#include <spa/param/audio/format-utils.h>
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#include <spa/utils/hook.h>
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#include <spa/utils/json.h>
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#include <pipewire/pipewire.h>
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#include "../defs.h"
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#include "../module.h"
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#define NAME "virtual-sink"
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PW_LOG_TOPIC_STATIC(mod_topic, "mod." NAME);
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#define PW_LOG_TOPIC_DEFAULT mod_topic
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struct module_virtual_sink_data {
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struct module *module;
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struct pw_impl_module *mod;
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struct spa_hook mod_listener;
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struct pw_properties *global_props;
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struct pw_properties *capture_props;
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struct pw_properties *playback_props;
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};
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static void module_destroy(void *data)
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{
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struct module_virtual_sink_data *d = data;
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spa_hook_remove(&d->mod_listener);
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d->mod = NULL;
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module_schedule_unload(d->module);
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}
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static const struct pw_impl_module_events module_events = {
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PW_VERSION_IMPL_MODULE_EVENTS,
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.destroy = module_destroy
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};
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static int module_virtual_sink_load(struct module *module)
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{
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struct module_virtual_sink_data *data = module->user_data;
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FILE *f;
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char *args;
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size_t size;
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pw_properties_setf(data->capture_props, PW_KEY_NODE_GROUP, "virtual-sink-%u", module->index);
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pw_properties_setf(data->playback_props, PW_KEY_NODE_GROUP, "virtual-sink-%u", module->index);
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pw_properties_setf(data->capture_props, "pulse.module.id", "%u", module->index);
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pw_properties_setf(data->playback_props, "pulse.module.id", "%u", module->index);
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if ((f = open_memstream(&args, &size)) == NULL)
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return -errno;
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fprintf(f, "{");
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pw_properties_serialize_dict(f, &data->global_props->dict, 0);
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fprintf(f, " capture.props = {");
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pw_properties_serialize_dict(f, &data->capture_props->dict, 0);
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fprintf(f, " } playback.props = {");
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pw_properties_serialize_dict(f, &data->playback_props->dict, 0);
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fprintf(f, " } }");
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fclose(f);
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data->mod = pw_context_load_module(module->impl->context,
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"libpipewire-module-loopback",
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args, NULL);
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free(args);
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if (data->mod == NULL)
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return -errno;
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pw_impl_module_add_listener(data->mod,
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&data->mod_listener,
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&module_events, data);
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return 0;
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}
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static int module_virtual_sink_unload(struct module *module)
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{
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struct module_virtual_sink_data *d = module->user_data;
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if (d->mod) {
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spa_hook_remove(&d->mod_listener);
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pw_impl_module_destroy(d->mod);
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d->mod = NULL;
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}
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pw_properties_free(d->capture_props);
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pw_properties_free(d->playback_props);
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pw_properties_free(d->global_props);
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return 0;
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}
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static const struct spa_dict_item module_virtual_sink_info[] = {
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{ PW_KEY_MODULE_AUTHOR, "Wim Taymans <wim.taymans@gmail.com>" },
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{ PW_KEY_MODULE_DESCRIPTION, "Virtual sink" },
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{ PW_KEY_MODULE_USAGE, "sink_name=<name for the sink> "
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"sink_properties=<properties for the sink> "
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"master=<name of sink to filter> "
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"channels=<number of channels> "
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"channel_map=<channel map> "
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"use_volume_sharing=<yes or no> "
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"force_flat_volume=<yes or no> " },
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{ PW_KEY_MODULE_VERSION, PACKAGE_VERSION },
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};
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static int module_virtual_sink_prepare(struct module * const module)
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{
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struct module_virtual_sink_data * const d = module->user_data;
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struct pw_properties * const props = module->props;
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struct pw_properties *global_props = NULL, *playback_props = NULL, *capture_props = NULL;
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const char *str;
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struct spa_audio_info_raw info = { 0 };
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int res;
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PW_LOG_TOPIC_INIT(mod_topic);
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global_props = pw_properties_new(NULL, NULL);
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capture_props = pw_properties_new(NULL, NULL);
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playback_props = pw_properties_new(NULL, NULL);
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if (!global_props || !capture_props || !playback_props) {
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res = -EINVAL;
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goto out;
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}
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if ((str = pw_properties_get(props, "sink_name")) != NULL) {
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pw_properties_set(global_props, PW_KEY_NODE_NAME, str);
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pw_properties_set(global_props, PW_KEY_NODE_DESCRIPTION, str);
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pw_properties_set(props, "sink_name", NULL);
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} else {
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pw_properties_set(global_props, PW_KEY_NODE_NAME, "vsink");
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pw_properties_set(global_props, PW_KEY_NODE_DESCRIPTION, "Virtual Sink");
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}
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if ((str = pw_properties_get(props, "sink_properties")) != NULL) {
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module_args_add_props(capture_props, str);
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pw_properties_set(props, "sink_properties", NULL);
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}
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pw_properties_set(playback_props, PW_KEY_NODE_PASSIVE, "true");
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if (pw_properties_get(capture_props, PW_KEY_MEDIA_CLASS) == NULL)
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pw_properties_set(capture_props, PW_KEY_MEDIA_CLASS, "Audio/Sink");
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if ((str = pw_properties_get(props, "master")) != NULL) {
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pw_properties_set(playback_props, PW_KEY_TARGET_OBJECT, str);
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pw_properties_set(props, "master", NULL);
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}
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if (module_args_to_audioinfo_keys(module->impl, props,
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NULL, NULL, "channels", "channel_map", &info) < 0) {
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res = -EINVAL;
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goto out;
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}
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audioinfo_to_properties(&info, global_props);
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d->module = module;
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d->global_props = global_props;
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d->capture_props = capture_props;
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d->playback_props = playback_props;
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return 0;
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out:
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pw_properties_free(global_props);
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pw_properties_free(playback_props);
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pw_properties_free(capture_props);
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return res;
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}
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DEFINE_MODULE_INFO(module_virtual_sink) = {
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.name = "module-virtual-sink",
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.prepare = module_virtual_sink_prepare,
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.load = module_virtual_sink_load,
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.unload = module_virtual_sink_unload,
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.properties = &SPA_DICT_INIT_ARRAY(module_virtual_sink_info),
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.data_size = sizeof(struct module_virtual_sink_data),
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};
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@ -0,0 +1,188 @@
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/* PipeWire */
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/* SPDX-FileCopyrightText: Copyright © 2021 Wim Taymans <wim.taymans@gmail.com> */
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/* SPDX-FileCopyrightText: Copyright © 2021 Arun Raghavan <arun@asymptotic.io> */
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/* SPDX-License-Identifier: MIT */
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#include <spa/param/audio/format-utils.h>
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#include <spa/utils/hook.h>
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#include <spa/utils/json.h>
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#include <pipewire/pipewire.h>
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#include "../defs.h"
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#include "../module.h"
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#define NAME "virtual-source"
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PW_LOG_TOPIC_STATIC(mod_topic, "mod." NAME);
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#define PW_LOG_TOPIC_DEFAULT mod_topic
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struct module_virtual_source_data {
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struct module *module;
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struct pw_impl_module *mod;
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struct spa_hook mod_listener;
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struct pw_properties *global_props;
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struct pw_properties *capture_props;
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struct pw_properties *playback_props;
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};
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static void module_destroy(void *data)
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{
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struct module_virtual_source_data *d = data;
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spa_hook_remove(&d->mod_listener);
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d->mod = NULL;
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module_schedule_unload(d->module);
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}
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static const struct pw_impl_module_events module_events = {
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PW_VERSION_IMPL_MODULE_EVENTS,
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.destroy = module_destroy
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};
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static int module_virtual_source_load(struct module *module)
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{
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struct module_virtual_source_data *data = module->user_data;
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FILE *f;
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char *args;
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size_t size;
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pw_properties_setf(data->capture_props, PW_KEY_NODE_GROUP, "virtual-source-%u", module->index);
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pw_properties_setf(data->playback_props, PW_KEY_NODE_GROUP, "virtual-source-%u", module->index);
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pw_properties_setf(data->capture_props, "pulse.module.id", "%u", module->index);
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pw_properties_setf(data->playback_props, "pulse.module.id", "%u", module->index);
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if ((f = open_memstream(&args, &size)) == NULL)
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return -errno;
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fprintf(f, "{");
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pw_properties_serialize_dict(f, &data->global_props->dict, 0);
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fprintf(f, " capture.props = {");
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pw_properties_serialize_dict(f, &data->capture_props->dict, 0);
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fprintf(f, " } playback.props = {");
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pw_properties_serialize_dict(f, &data->playback_props->dict, 0);
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fprintf(f, " } }");
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fclose(f);
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data->mod = pw_context_load_module(module->impl->context,
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"libpipewire-module-loopback",
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args, NULL);
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free(args);
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if (data->mod == NULL)
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return -errno;
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pw_impl_module_add_listener(data->mod,
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&data->mod_listener,
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&module_events, data);
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return 0;
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}
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static int module_virtual_source_unload(struct module *module)
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{
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struct module_virtual_source_data *d = module->user_data;
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if (d->mod) {
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spa_hook_remove(&d->mod_listener);
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pw_impl_module_destroy(d->mod);
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d->mod = NULL;
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}
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pw_properties_free(d->capture_props);
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pw_properties_free(d->playback_props);
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pw_properties_free(d->global_props);
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return 0;
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}
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static const struct spa_dict_item module_virtual_source_info[] = {
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{ PW_KEY_MODULE_AUTHOR, "Arun Raghavan <arun@asymptotic.io>" },
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{ PW_KEY_MODULE_DESCRIPTION, "Loopback from source to sink" },
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{ PW_KEY_MODULE_USAGE, "source_name=<name for the source> "
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"source_properties=<properties for the source> "
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"master=<name of source to filter> "
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"uplink_sink=<name> (optional)"
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"channels=<number of channels> "
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"channel_map=<channel map> "
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"use_volume_sharing=<yes or no> "
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"force_flat_volume=<yes or no> " },
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{ PW_KEY_MODULE_VERSION, PACKAGE_VERSION },
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};
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static int module_virtual_source_prepare(struct module * const module)
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{
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struct module_virtual_source_data * const d = module->user_data;
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struct pw_properties * const props = module->props;
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struct pw_properties *global_props = NULL, *playback_props = NULL, *capture_props = NULL;
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const char *str;
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struct spa_audio_info_raw info = { 0 };
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int res;
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PW_LOG_TOPIC_INIT(mod_topic);
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global_props = pw_properties_new(NULL, NULL);
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capture_props = pw_properties_new(NULL, NULL);
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playback_props = pw_properties_new(NULL, NULL);
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if (!global_props || !capture_props || !playback_props) {
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res = -EINVAL;
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goto out;
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}
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if ((str = pw_properties_get(props, "source_name")) != NULL) {
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pw_properties_set(global_props, PW_KEY_NODE_NAME, str);
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pw_properties_set(global_props, PW_KEY_NODE_DESCRIPTION, str);
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pw_properties_set(props, "source_name", NULL);
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} else {
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pw_properties_set(global_props, PW_KEY_NODE_NAME, "vsource");
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pw_properties_set(global_props, PW_KEY_NODE_DESCRIPTION, "Virtual Source");
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}
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if ((str = pw_properties_get(props, "source_properties")) != NULL) {
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module_args_add_props(playback_props, str);
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pw_properties_set(props, "source_properties", NULL);
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}
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pw_properties_set(capture_props, PW_KEY_NODE_PASSIVE, "true");
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if (pw_properties_get(playback_props, PW_KEY_MEDIA_CLASS) == NULL)
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pw_properties_set(playback_props, PW_KEY_MEDIA_CLASS, "Audio/Source");
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if ((str = pw_properties_get(props, "master")) != NULL) {
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if (spa_strendswith(str, ".monitor")) {
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pw_properties_setf(capture_props, PW_KEY_TARGET_OBJECT,
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"%.*s", (int)strlen(str)-8, str);
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pw_properties_set(capture_props, PW_KEY_STREAM_CAPTURE_SINK,
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"true");
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} else {
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pw_properties_set(capture_props, PW_KEY_TARGET_OBJECT, str);
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}
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pw_properties_set(props, "master", NULL);
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}
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if (module_args_to_audioinfo_keys(module->impl, props,
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NULL, NULL, "channels", "channel_map", &info) < 0) {
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res = -EINVAL;
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goto out;
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}
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audioinfo_to_properties(&info, global_props);
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d->module = module;
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d->global_props = global_props;
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d->capture_props = capture_props;
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d->playback_props = playback_props;
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return 0;
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out:
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pw_properties_free(global_props);
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pw_properties_free(playback_props);
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pw_properties_free(capture_props);
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return res;
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}
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DEFINE_MODULE_INFO(module_virtual_source) = {
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.name = "module-virtual-source",
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.prepare = module_virtual_source_prepare,
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.load = module_virtual_source_load,
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.unload = module_virtual_source_unload,
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.properties = &SPA_DICT_INIT_ARRAY(module_virtual_source_info),
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.data_size = sizeof(struct module_virtual_source_data),
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};
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