488 lines
13 KiB
C
488 lines
13 KiB
C
/* PipeWire
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*
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* Copyright © 2021 Wim Taymans <wim.taymans@gmail.com>
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* Copyright © 2021 Arun Raghavan <arun@asymptotic.io>
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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 <spa/param/audio/format-utils.h>
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#include <pipewire/pipewire.h>
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#include <pipewire/utils.h>
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#include "../manager.h"
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#include "../module.h"
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#include "registry.h"
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#define NAME "combine-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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#define MAX_SINKS 64 /* ... good enough for anyone */
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static const struct spa_dict_item module_combine_sink_info[] = {
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{ PW_KEY_MODULE_AUTHOR, "Arun Raghavan <arun@asymptotic.io>" },
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{ PW_KEY_MODULE_DESCRIPTION, "Combine multiple sinks into a single sink" },
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{ PW_KEY_MODULE_USAGE, "sink_name=<name of the sink> "
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"sink_properties=<properties for the sink> "
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/* not a great name, but for backwards compatibility... */
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"slaves=<sinks to combine> "
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"rate=<sample rate> "
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"channels=<number of channels> "
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"channel_map=<channel map> " },
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{ PW_KEY_MODULE_VERSION, PACKAGE_VERSION },
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};
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struct module_combine_sink_data;
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/* This goes to the stream event listener to be able to identify the stream on
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* which the event occurred and to have a link to the module data */
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struct combine_stream {
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struct pw_stream *stream;
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struct spa_hook stream_listener;
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struct module_combine_sink_data *data;
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bool cleanup;
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};
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struct module_combine_sink_data {
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struct module *module;
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struct pw_core *core;
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struct pw_manager *manager;
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struct pw_stream *sink;
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struct spa_hook core_listener;
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struct spa_hook manager_listener;
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struct spa_hook sink_listener;
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char *sink_name;
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char **sink_names;
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struct combine_stream streams[MAX_SINKS];
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struct spa_source *cleanup;
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struct spa_audio_info_raw info;
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};
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/* Core connection: mainly to unload the module if the connection errors out */
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static void on_core_error(void *data, uint32_t id, int seq, int res, const char *message)
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{
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struct module_combine_sink_data *d = data;
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struct module *module = d->module;
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pw_log_error("error id:%u seq:%d res:%d (%s): %s",
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id, seq, res, spa_strerror(res), message);
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if (id == PW_ID_CORE && res == -EPIPE)
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module_schedule_unload(module);
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}
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static const struct pw_core_events core_events = {
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PW_VERSION_CORE_EVENTS,
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.error = on_core_error,
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};
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/* Input stream: the "combine sink" */
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static void capture_process(void *d)
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{
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struct module_combine_sink_data *data = d;
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struct pw_buffer *in;
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int i;
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if ((in = pw_stream_dequeue_buffer(data->sink)) == NULL) {
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pw_log_warn("out of capture buffers: %m");
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return;
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}
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for (i = 0; i < MAX_SINKS; i++) {
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struct pw_buffer *out;
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uint32_t j, size = 0;
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int32_t stride = 0;
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if (data->streams[i].stream == NULL || data->streams[i].cleanup)
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continue;
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if ((out = pw_stream_dequeue_buffer(data->streams[i].stream)) == NULL) {
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pw_log_warn("out of playback buffers: %m");
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continue;
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}
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if (in->buffer->n_datas != out->buffer->n_datas) {
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pw_log_error("incompatible buffer planes");
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continue;
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}
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for (j = 0; j < out->buffer->n_datas; j++) {
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struct spa_data *ds, *dd;
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dd = &out->buffer->datas[j];
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if (j < in->buffer->n_datas) {
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ds = &in->buffer->datas[j];
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memcpy(dd->data,
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SPA_PTROFF(ds->data, ds->chunk->offset, void),
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ds->chunk->size);
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size = SPA_MAX(size, ds->chunk->size);
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stride = SPA_MAX(stride, ds->chunk->stride);
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} else {
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memset(dd->data, 0, size);
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}
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dd->chunk->offset = 0;
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dd->chunk->size = size;
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dd->chunk->stride = stride;
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}
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pw_stream_queue_buffer(data->streams[i].stream, out);
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}
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if (in != NULL)
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pw_stream_queue_buffer(data->sink, in);
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}
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static void on_in_stream_state_changed(void *d, enum pw_stream_state old,
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enum pw_stream_state state, const char *error)
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{
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struct module_combine_sink_data *data = d;
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struct module *module = data->module;
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if (state == PW_STREAM_STATE_UNCONNECTED) {
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pw_log_info("stream disconnected, unloading");
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module_schedule_unload(module);
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}
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}
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static const struct pw_stream_events in_stream_events = {
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PW_VERSION_STREAM_EVENTS,
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.state_changed = on_in_stream_state_changed,
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.process = capture_process
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};
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/* Output streams: one per sink we have combined output to */
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static void on_out_stream_state_changed(void *data, enum pw_stream_state old,
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enum pw_stream_state state, const char *error)
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{
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struct combine_stream *s = data;
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if (state == PW_STREAM_STATE_UNCONNECTED) {
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s->cleanup = true;
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pw_loop_signal_event(s->data->module->impl->loop, s->data->cleanup);
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}
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}
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static const struct pw_stream_events out_stream_events = {
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PW_VERSION_STREAM_EVENTS,
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.state_changed = on_out_stream_state_changed,
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};
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static void manager_added(void *d, struct pw_manager_object *o)
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{
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struct module_combine_sink_data *data = d;
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struct combine_stream *cstream;
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struct pw_properties *props;
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const struct spa_pod *params[1];
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const char *sink_name;
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struct spa_pod_builder b;
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uint32_t n_params;
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char buffer[1024];
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int i, res;
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if (!pw_manager_object_is_sink(o))
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return;
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sink_name = pw_properties_get(o->props, PW_KEY_NODE_NAME);
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if (strcmp(sink_name, data->sink_name) == 0) {
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/* That's the sink we created */
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return;
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}
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if (data->sink_names) {
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int i;
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for (i = 0; data->sink_names[i] != NULL; i++) {
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if (strcmp(data->sink_names[i], sink_name) == 0) {
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i = -1;
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break;
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}
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}
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/* This sink isn't in our list */
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if (i > -1)
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return;
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}
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pw_log_info("Adding %s to combine outputs", sink_name);
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for (i = 0; i < MAX_SINKS; i++)
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if (data->streams[i].stream == NULL)
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break;
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if (i == MAX_SINKS) {
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pw_log_error("Cannot combine more than %u sinks", MAX_SINKS);
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return;
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} else {
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cstream = &data->streams[i];
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}
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snprintf(buffer, sizeof(buffer), "Simultaneous output on %s",
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pw_properties_get(o->props, PW_KEY_NODE_DESCRIPTION));
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props = pw_properties_new(NULL, NULL);
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pw_properties_set(props, PW_KEY_NODE_TARGET, sink_name);
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pw_properties_setf(props, PW_KEY_NODE_GROUP, "combine_sink-%u", data->module->idx);
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pw_properties_setf(props, PW_KEY_NODE_LINK_GROUP, "combine_sink-%u", data->module->idx);
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pw_properties_set(props, PW_KEY_NODE_DONT_RECONNECT, "true");
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pw_properties_set(props, PW_KEY_NODE_VIRTUAL, "true");
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pw_properties_set(props, PW_KEY_NODE_PASSIVE, "true");
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cstream->data = data;
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cstream->stream = pw_stream_new(data->core, buffer, props);
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if (cstream->stream == NULL) {
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pw_log_error("Could not create stream");
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return;
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}
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pw_stream_add_listener(cstream->stream,
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&cstream->stream_listener,
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&out_stream_events, cstream);
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n_params = 0;
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b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
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params[n_params++] = spa_format_audio_raw_build(&b, SPA_PARAM_EnumFormat,
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&data->info);
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if ((res = pw_stream_connect(cstream->stream,
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PW_DIRECTION_OUTPUT,
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PW_ID_ANY,
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PW_STREAM_FLAG_AUTOCONNECT |
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PW_STREAM_FLAG_MAP_BUFFERS |
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PW_STREAM_FLAG_RT_PROCESS,
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params, n_params)) < 0) {
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pw_log_error("Could not connect to sink '%s'", sink_name);
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return;
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}
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}
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static const struct pw_manager_events manager_events = {
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PW_VERSION_MANAGER_EVENTS,
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.added = manager_added,
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};
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static void cleanup_stream(struct combine_stream *s)
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{
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spa_hook_remove(&s->stream_listener);
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pw_stream_destroy(s->stream);
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s->stream = NULL;
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s->data = NULL;
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s->cleanup = false;
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}
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static void on_cleanup(void *d, uint64_t count)
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{
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struct module_combine_sink_data *data = d;
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int i;
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for (i = 0; i < MAX_SINKS; i++) {
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if (data->streams[i].cleanup)
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cleanup_stream(&data->streams[i]);
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}
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}
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static int module_combine_sink_load(struct client *client, struct module *module)
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{
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struct module_combine_sink_data *data = module->user_data;
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struct pw_properties *props;
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int res;
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uint32_t n_params;
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const struct spa_pod *params[1];
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uint8_t buffer[1024];
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struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
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data->core = pw_context_connect(module->impl->context,
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pw_properties_copy(client->props),
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0);
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if (data->core == NULL)
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return -errno;
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pw_core_add_listener(data->core,
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&data->core_listener,
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&core_events, data);
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props = pw_properties_new(NULL, NULL);
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pw_properties_set(props, PW_KEY_NODE_NAME, data->sink_name);
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pw_properties_set(props, PW_KEY_NODE_DESCRIPTION, data->sink_name);
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pw_properties_set(props, PW_KEY_MEDIA_CLASS, "Audio/Sink");
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pw_properties_setf(props, PW_KEY_NODE_GROUP, "combine_sink-%u", data->module->idx);
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pw_properties_setf(props, PW_KEY_NODE_LINK_GROUP, "combine_sink-%u", data->module->idx);
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pw_properties_set(props, PW_KEY_NODE_VIRTUAL, "true");
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data->sink = pw_stream_new(data->core, data->sink_name, props);
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if (data->sink == NULL)
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return -errno;
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pw_stream_add_listener(data->sink,
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&data->sink_listener,
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&in_stream_events, data);
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n_params = 0;
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params[n_params++] = spa_format_audio_raw_build(&b, SPA_PARAM_EnumFormat,
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&data->info);
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if ((res = pw_stream_connect(data->sink,
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PW_DIRECTION_INPUT,
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PW_ID_ANY,
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PW_STREAM_FLAG_MAP_BUFFERS |
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PW_STREAM_FLAG_RT_PROCESS,
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params, n_params)) < 0)
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return res;
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data->manager = pw_manager_new(data->core);
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if (client->manager == NULL)
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return -errno;
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pw_manager_add_listener(data->manager, &data->manager_listener,
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&manager_events, data);
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data->cleanup = pw_loop_add_event(module->impl->loop, on_cleanup, data);
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return 0;
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}
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static int module_combine_sink_unload(struct client *client, struct module *module)
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{
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struct module_combine_sink_data *d = module->user_data;
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int i;
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if (d->cleanup != NULL)
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pw_loop_destroy_source(module->impl->loop, d->cleanup);
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/* Note that we explicitly disconnect the hooks to avoid having the
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* cleanup triggered again in those callbacks */
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if (d->sink != NULL) {
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spa_hook_remove(&d->sink_listener);
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pw_stream_destroy(d->sink);
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}
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for (i = 0; i < MAX_SINKS; i++) {
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if (d->streams[i].stream)
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cleanup_stream(&d->streams[i]);
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}
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if (d->manager != NULL) {
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spa_hook_remove(&d->manager_listener);
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pw_manager_destroy(d->manager);
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}
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if (d->core != NULL) {
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spa_hook_remove(&d->core_listener);
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pw_core_disconnect(d->core);
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}
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pw_free_strv(d->sink_names);
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free(d->sink_name);
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return 0;
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}
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static const struct module_methods module_combine_sink_methods = {
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VERSION_MODULE_METHODS,
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.load = module_combine_sink_load,
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.unload = module_combine_sink_unload,
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};
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struct module *create_module_combine_sink(struct impl *impl, const char *argument)
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{
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struct module *module;
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struct module_combine_sink_data *d;
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struct pw_properties *props = NULL;
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const char *str;
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char *sink_name = NULL, **sink_names = NULL;
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struct spa_audio_info_raw info = { 0 };
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int i, n, res;
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PW_LOG_TOPIC_INIT(mod_topic);
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props = pw_properties_new_dict(&SPA_DICT_INIT_ARRAY(module_combine_sink_info));
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if (!props) {
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res = -EINVAL;
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goto out;
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}
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if (argument)
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module_args_add_props(props, argument);
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if ((str = pw_properties_get(props, "sink_name")) != NULL) {
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sink_name = strdup(str);
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pw_properties_set(props, "sink_name", NULL);
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} else {
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sink_name = strdup("combined");
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}
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if ((str = pw_properties_get(props, "slaves")) != NULL) {
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sink_names = pw_split_strv(str, ",", MAX_SINKS, &n);
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pw_properties_set(props, "slaves", NULL);
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}
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if ((str = pw_properties_get(props, "adjust_time")) != NULL) {
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pw_log_info("The `adjust_time` modarg is ignored");
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pw_properties_set(props, "adjust_time", NULL);
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}
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if ((str = pw_properties_get(props, "resample_method")) != NULL) {
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pw_log_info("The `resample_method` modarg is ignored");
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pw_properties_set(props, "resample_method", NULL);
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}
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if (module_args_to_audioinfo(impl, props, &info) < 0) {
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res = -EINVAL;
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goto out;
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}
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module = module_new(impl, &module_combine_sink_methods, sizeof(*d));
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if (module == NULL) {
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res = -errno;
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goto out;
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}
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module->props = props;
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d = module->user_data;
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d->module = module;
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d->info = info;
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d->sink_name = sink_name;
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d->sink_names = sink_names;
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for (i = 0; i < MAX_SINKS; i++) {
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d->streams[i].stream = NULL;
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d->streams[i].cleanup = false;
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}
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return module;
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out:
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pw_properties_free(props);
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free(sink_name);
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pw_free_strv(sink_names);
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errno = -res;
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return NULL;
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}
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