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pulse-server: add virtual-sink and virtual-source

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Although those are example elements, they actually work and we can
implement them as well.
This commit is contained in:
Wim Taymans 2023-06-16 12:18:36 +02:00
parent b9789e36cd
commit 989c61e8a1
2 changed files with 367 additions and 0 deletions
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179
src/modules/module-protocol-pulse/modules/module-virtual-sink.c Normal file
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/* PipeWire */
/* SPDX-FileCopyrightText: Copyright © 2023 Wim Taymans <wim.taymans@gmail.com> */
/* SPDX-License-Identifier: MIT */
#include <spa/param/audio/format-utils.h>
#include <spa/utils/hook.h>
#include <spa/utils/json.h>
#include <pipewire/pipewire.h>
#include "../defs.h"
#include "../module.h"
#define NAME "virtual-sink"
PW_LOG_TOPIC_STATIC(mod_topic, "mod." NAME);
#define PW_LOG_TOPIC_DEFAULT mod_topic
struct module_virtual_sink_data {
struct module *module;
struct pw_impl_module *mod;
struct spa_hook mod_listener;
struct pw_properties *global_props;
struct pw_properties *capture_props;
struct pw_properties *playback_props;
};
static void module_destroy(void *data)
{
struct module_virtual_sink_data *d = data;
spa_hook_remove(&d->mod_listener);
d->mod = NULL;
module_schedule_unload(d->module);
}
static const struct pw_impl_module_events module_events = {
PW_VERSION_IMPL_MODULE_EVENTS,
.destroy = module_destroy
};
static int module_virtual_sink_load(struct module *module)
{
struct module_virtual_sink_data *data = module->user_data;
FILE *f;
char *args;
size_t size;
pw_properties_setf(data->capture_props, PW_KEY_NODE_GROUP, "virtual-sink-%u", module->index);
pw_properties_setf(data->playback_props, PW_KEY_NODE_GROUP, "virtual-sink-%u", module->index);
pw_properties_setf(data->capture_props, "pulse.module.id", "%u", module->index);
pw_properties_setf(data->playback_props, "pulse.module.id", "%u", module->index);
if ((f = open_memstream(&args, &size)) == NULL)
return -errno;
fprintf(f, "{");
pw_properties_serialize_dict(f, &data->global_props->dict, 0);
fprintf(f, " capture.props = {");
pw_properties_serialize_dict(f, &data->capture_props->dict, 0);
fprintf(f, " } playback.props = {");
pw_properties_serialize_dict(f, &data->playback_props->dict, 0);
fprintf(f, " } }");
fclose(f);
data->mod = pw_context_load_module(module->impl->context,
"libpipewire-module-loopback",
args, NULL);
free(args);
if (data->mod == NULL)
return -errno;
pw_impl_module_add_listener(data->mod,
&data->mod_listener,
&module_events, data);
return 0;
}
static int module_virtual_sink_unload(struct module *module)
{
struct module_virtual_sink_data *d = module->user_data;
if (d->mod) {
spa_hook_remove(&d->mod_listener);
pw_impl_module_destroy(d->mod);
d->mod = NULL;
}
pw_properties_free(d->capture_props);
pw_properties_free(d->playback_props);
pw_properties_free(d->global_props);
return 0;
}
static const struct spa_dict_item module_virtual_sink_info[] = {
{ PW_KEY_MODULE_AUTHOR, "Wim Taymans <wim.taymans@gmail.com>" },
{ PW_KEY_MODULE_DESCRIPTION, "Virtual sink" },
{ PW_KEY_MODULE_USAGE, "sink_name=<name for the sink> "
"sink_properties=<properties for the sink> "
"master=<name of sink to filter> "
"channels=<number of channels> "
"channel_map=<channel map> "
"use_volume_sharing=<yes or no> "
"force_flat_volume=<yes or no> " },
{ PW_KEY_MODULE_VERSION, PACKAGE_VERSION },
};
static int module_virtual_sink_prepare(struct module * const module)
{
struct module_virtual_sink_data * const d = module->user_data;
struct pw_properties * const props = module->props;
struct pw_properties *global_props = NULL, *playback_props = NULL, *capture_props = NULL;
const char *str;
struct spa_audio_info_raw info = { 0 };
int res;
PW_LOG_TOPIC_INIT(mod_topic);
global_props = pw_properties_new(NULL, NULL);
capture_props = pw_properties_new(NULL, NULL);
playback_props = pw_properties_new(NULL, NULL);
if (!global_props || !capture_props || !playback_props) {
res = -EINVAL;
goto out;
}
if ((str = pw_properties_get(props, "sink_name")) != NULL) {
pw_properties_set(global_props, PW_KEY_NODE_NAME, str);
pw_properties_set(global_props, PW_KEY_NODE_DESCRIPTION, str);
pw_properties_set(props, "sink_name", NULL);
} else {
pw_properties_set(global_props, PW_KEY_NODE_NAME, "vsink");
pw_properties_set(global_props, PW_KEY_NODE_DESCRIPTION, "Virtual Sink");
}
if ((str = pw_properties_get(props, "sink_properties")) != NULL) {
module_args_add_props(capture_props, str);
pw_properties_set(props, "sink_properties", NULL);
}
pw_properties_set(playback_props, PW_KEY_NODE_PASSIVE, "true");
if (pw_properties_get(capture_props, PW_KEY_MEDIA_CLASS) == NULL)
pw_properties_set(capture_props, PW_KEY_MEDIA_CLASS, "Audio/Sink");
if ((str = pw_properties_get(props, "master")) != NULL) {
pw_properties_set(playback_props, PW_KEY_TARGET_OBJECT, str);
pw_properties_set(props, "master", NULL);
}
if (module_args_to_audioinfo_keys(module->impl, props,
NULL, NULL, "channels", "channel_map", &info) < 0) {
res = -EINVAL;
goto out;
}
audioinfo_to_properties(&info, global_props);
d->module = module;
d->global_props = global_props;
d->capture_props = capture_props;
d->playback_props = playback_props;
return 0;
out:
pw_properties_free(global_props);
pw_properties_free(playback_props);
pw_properties_free(capture_props);
return res;
}
DEFINE_MODULE_INFO(module_virtual_sink) = {
.name = "module-virtual-sink",
.prepare = module_virtual_sink_prepare,
.load = module_virtual_sink_load,
.unload = module_virtual_sink_unload,
.properties = &SPA_DICT_INIT_ARRAY(module_virtual_sink_info),
.data_size = sizeof(struct module_virtual_sink_data),
};

188
src/modules/module-protocol-pulse/modules/module-virtual-source.c Normal file
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/* PipeWire */
/* SPDX-FileCopyrightText: Copyright © 2021 Wim Taymans <wim.taymans@gmail.com> */
/* SPDX-FileCopyrightText: Copyright © 2021 Arun Raghavan <arun@asymptotic.io> */
/* SPDX-License-Identifier: MIT */
#include <spa/param/audio/format-utils.h>
#include <spa/utils/hook.h>
#include <spa/utils/json.h>
#include <pipewire/pipewire.h>
#include "../defs.h"
#include "../module.h"
#define NAME "virtual-source"
PW_LOG_TOPIC_STATIC(mod_topic, "mod." NAME);
#define PW_LOG_TOPIC_DEFAULT mod_topic
struct module_virtual_source_data {
struct module *module;
struct pw_impl_module *mod;
struct spa_hook mod_listener;
struct pw_properties *global_props;
struct pw_properties *capture_props;
struct pw_properties *playback_props;
};
static void module_destroy(void *data)
{
struct module_virtual_source_data *d = data;
spa_hook_remove(&d->mod_listener);
d->mod = NULL;
module_schedule_unload(d->module);
}
static const struct pw_impl_module_events module_events = {
PW_VERSION_IMPL_MODULE_EVENTS,
.destroy = module_destroy
};
static int module_virtual_source_load(struct module *module)
{
struct module_virtual_source_data *data = module->user_data;
FILE *f;
char *args;
size_t size;
pw_properties_setf(data->capture_props, PW_KEY_NODE_GROUP, "virtual-source-%u", module->index);
pw_properties_setf(data->playback_props, PW_KEY_NODE_GROUP, "virtual-source-%u", module->index);
pw_properties_setf(data->capture_props, "pulse.module.id", "%u", module->index);
pw_properties_setf(data->playback_props, "pulse.module.id", "%u", module->index);
if ((f = open_memstream(&args, &size)) == NULL)
return -errno;
fprintf(f, "{");
pw_properties_serialize_dict(f, &data->global_props->dict, 0);
fprintf(f, " capture.props = {");
pw_properties_serialize_dict(f, &data->capture_props->dict, 0);
fprintf(f, " } playback.props = {");
pw_properties_serialize_dict(f, &data->playback_props->dict, 0);
fprintf(f, " } }");
fclose(f);
data->mod = pw_context_load_module(module->impl->context,
"libpipewire-module-loopback",
args, NULL);
free(args);
if (data->mod == NULL)
return -errno;
pw_impl_module_add_listener(data->mod,
&data->mod_listener,
&module_events, data);
return 0;
}
static int module_virtual_source_unload(struct module *module)
{
struct module_virtual_source_data *d = module->user_data;
if (d->mod) {
spa_hook_remove(&d->mod_listener);
pw_impl_module_destroy(d->mod);
d->mod = NULL;
}
pw_properties_free(d->capture_props);
pw_properties_free(d->playback_props);
pw_properties_free(d->global_props);
return 0;
}
static const struct spa_dict_item module_virtual_source_info[] = {
{ PW_KEY_MODULE_AUTHOR, "Arun Raghavan <arun@asymptotic.io>" },
{ PW_KEY_MODULE_DESCRIPTION, "Loopback from source to sink" },
{ PW_KEY_MODULE_USAGE, "source_name=<name for the source> "
"source_properties=<properties for the source> "
"master=<name of source to filter> "
"uplink_sink=<name> (optional)"
"channels=<number of channels> "
"channel_map=<channel map> "
"use_volume_sharing=<yes or no> "
"force_flat_volume=<yes or no> " },
{ PW_KEY_MODULE_VERSION, PACKAGE_VERSION },
};
static int module_virtual_source_prepare(struct module * const module)
{
struct module_virtual_source_data * const d = module->user_data;
struct pw_properties * const props = module->props;
struct pw_properties *global_props = NULL, *playback_props = NULL, *capture_props = NULL;
const char *str;
struct spa_audio_info_raw info = { 0 };
int res;
PW_LOG_TOPIC_INIT(mod_topic);
global_props = pw_properties_new(NULL, NULL);
capture_props = pw_properties_new(NULL, NULL);
playback_props = pw_properties_new(NULL, NULL);
if (!global_props || !capture_props || !playback_props) {
res = -EINVAL;
goto out;
}
if ((str = pw_properties_get(props, "source_name")) != NULL) {
pw_properties_set(global_props, PW_KEY_NODE_NAME, str);
pw_properties_set(global_props, PW_KEY_NODE_DESCRIPTION, str);
pw_properties_set(props, "source_name", NULL);
} else {
pw_properties_set(global_props, PW_KEY_NODE_NAME, "vsource");
pw_properties_set(global_props, PW_KEY_NODE_DESCRIPTION, "Virtual Source");
}
if ((str = pw_properties_get(props, "source_properties")) != NULL) {
module_args_add_props(playback_props, str);
pw_properties_set(props, "source_properties", NULL);
}
pw_properties_set(capture_props, PW_KEY_NODE_PASSIVE, "true");
if (pw_properties_get(playback_props, PW_KEY_MEDIA_CLASS) == NULL)
pw_properties_set(playback_props, PW_KEY_MEDIA_CLASS, "Audio/Source");
if ((str = pw_properties_get(props, "master")) != NULL) {
if (spa_strendswith(str, ".monitor")) {
pw_properties_setf(capture_props, PW_KEY_TARGET_OBJECT,
"%.*s", (int)strlen(str)-8, str);
pw_properties_set(capture_props, PW_KEY_STREAM_CAPTURE_SINK,
"true");
} else {
pw_properties_set(capture_props, PW_KEY_TARGET_OBJECT, str);
}
pw_properties_set(props, "master", NULL);
}
if (module_args_to_audioinfo_keys(module->impl, props,
NULL, NULL, "channels", "channel_map", &info) < 0) {
res = -EINVAL;
goto out;
}
audioinfo_to_properties(&info, global_props);
d->module = module;
d->global_props = global_props;
d->capture_props = capture_props;
d->playback_props = playback_props;
return 0;
out:
pw_properties_free(global_props);
pw_properties_free(playback_props);
pw_properties_free(capture_props);
return res;
}
DEFINE_MODULE_INFO(module_virtual_source) = {
.name = "module-virtual-source",
.prepare = module_virtual_source_prepare,
.load = module_virtual_source_load,
.unload = module_virtual_source_unload,
.properties = &SPA_DICT_INIT_ARRAY(module_virtual_source_info),
.data_size = sizeof(struct module_virtual_source_data),
};