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| -rw-r--r-- | src/modules/module-echo-cancel.c | 1350 |
1 files changed, 1350 insertions, 0 deletions
diff --git a/src/modules/module-echo-cancel.c b/src/modules/module-echo-cancel.c new file mode 100644 index 0000000..34c16c7 --- /dev/null +++ b/src/modules/module-echo-cancel.c @@ -0,0 +1,1350 @@ +/* PipeWire + * + * Copyright © 2021 Wim Taymans + * © 2021 Arun Raghavan <arun@asymptotic.io> + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#include "config.h" + +#include <errno.h> +#include <fcntl.h> +#include <getopt.h> +#include <limits.h> +#include <math.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <unistd.h> + +#include <spa/debug/types.h> +#include <spa/param/audio/format-utils.h> +#include <spa/param/audio/raw.h> +#include <spa/param/latency-utils.h> +#include <spa/pod/builder.h> +#include <spa/pod/dynamic.h> +#include <spa/support/plugin.h> +#include <spa/utils/json.h> +#include <spa/utils/names.h> +#include <spa/utils/result.h> +#include <spa/utils/ringbuffer.h> +#include <spa/utils/string.h> +#include <spa/support/plugin-loader.h> +#include <spa/interfaces/audio/aec.h> + +#include <pipewire/impl.h> +#include <pipewire/pipewire.h> + +#include <pipewire/extensions/profiler.h> + +/** \page page_module_echo_cancel PipeWire Module: Echo Cancel + * + * The `echo-cancel` module performs echo cancellation. The module creates + * virtual `echo-cancel-capture` source and `echo-cancel-playback` sink + * nodes and the associated streams. + * + * ## Module Options + * + * Options specific to the behavior of this module + * + * - `capture.props = {}`: properties to be passed to the capture stream + * - `source.props = {}`: properties to be passed to the source stream + * - `sink.props = {}`: properties to be passed to the sink stream + * - `playback.props = {}`: properties to be passed to the playback stream + * - `library.name = <str>`: the echo cancellation library Currently supported: + * `aec/libspa-aec-webrtc`. Leave unset to use the default method (`aec/libspa-aec-webrtc`). + * - `aec.args = <str>`: arguments to pass to the echo cancellation method + * - `monitor.mode`: Instead of making a sink, make a stream that captures from + * the monitor ports of the default sink. + * + * ## General options + * + * Options with well-known behavior: + * + * - \ref PW_KEY_AUDIO_RATE + * - \ref PW_KEY_AUDIO_CHANNELS + * - \ref SPA_KEY_AUDIO_POSITION + * - \ref PW_KEY_MEDIA_CLASS + * - \ref PW_KEY_NODE_LATENCY + * - \ref PW_KEY_NODE_NAME + * - \ref PW_KEY_NODE_DESCRIPTION + * - \ref PW_KEY_NODE_GROUP + * - \ref PW_KEY_NODE_LINK_GROUP + * - \ref PW_KEY_NODE_VIRTUAL + * - \ref PW_KEY_NODE_LATENCY + * - \ref PW_KEY_REMOTE_NAME + * + * ## Example configuration + *\code{.unparsed} + * context.modules = [ + * { name = libpipewire-module-echo-cancel + * args = { + * # library.name = aec/libspa-aec-webrtc + * # node.latency = 1024/48000 + * # monitor.mode = false + * capture.props = { + * node.name = "Echo Cancellation Capture" + * } + * source.props = { + * node.name = "Echo Cancellation Source" + * } + * sink.props = { + * node.name = "Echo Cancellation Sink" + * } + * playback.props = { + * node.name = "Echo Cancellation Playback" + * } + * } + * } + *] + *\endcode + * + */ + +/** + * .--------. .---------. .--------. .----------. .-------. + * | source | --> | capture | --> | | --> | source | --> | app | + * '--------' '---------' | echo | '----------' '-------' + * | cancel | + * .--------. .---------. | | .----------. .--------. + * | app | --> | sink | --> | | --> | playback | --> | sink | + * '--------' '---------' '--------' '----------' '--------' + */ +#define NAME "echo-cancel" + +PW_LOG_TOPIC_STATIC(mod_topic, "mod." NAME); +#define PW_LOG_TOPIC_DEFAULT mod_topic + +#define DEFAULT_RATE 48000 +#define DEFAULT_CHANNELS 2 +#define DEFAULT_POSITION "[ FL FR ]" + +/* Hopefully this is enough for any combination of AEC engine and resampler + * input requirement for rate matching */ +#define MAX_BUFSIZE_MS 100 +#define DELAY_MS 0 + +static const struct spa_dict_item module_props[] = { + { PW_KEY_MODULE_AUTHOR, "Wim Taymans <wim.taymans@gmail.com>" }, + { PW_KEY_MODULE_DESCRIPTION, "Echo Cancellation" }, + { PW_KEY_MODULE_USAGE, " [ remote.name=<remote> ] " + "[ node.latency=<latency as fraction> ] " + "[ audio.rate=<sample rate> ] " + "[ audio.channels=<number of channels> ] " + "[ audio.position=<channel map> ] " + "[ buffer.max_size=<max buffer size in ms> ] " + "[ buffer.play_delay=<delay as fraction> ] " + "[ library.name =<library name> ] " + "[ aec.args=<aec arguments> ] " + "[ capture.props=<properties> ] " + "[ source.props=<properties> ] " + "[ sink.props=<properties> ] " + "[ playback.props=<properties> ] " }, + { PW_KEY_MODULE_VERSION, PACKAGE_VERSION }, +}; + +struct impl { + struct pw_context *context; + + struct pw_impl_module *module; + struct spa_hook module_listener; + + struct pw_core *core; + struct spa_hook core_proxy_listener; + struct spa_hook core_listener; + + struct spa_audio_info_raw info; + + struct pw_properties *capture_props; + struct pw_stream *capture; + struct spa_hook capture_listener; + struct spa_audio_info_raw capture_info; + + struct pw_properties *source_props; + struct pw_stream *source; + struct spa_hook source_listener; + struct spa_audio_info_raw source_info; + + void *rec_buffer[SPA_AUDIO_MAX_CHANNELS]; + uint32_t rec_ringsize; + struct spa_ringbuffer rec_ring; + + struct pw_properties *playback_props; + struct pw_stream *playback; + struct spa_hook playback_listener; + struct spa_audio_info_raw playback_info; + + struct pw_properties *sink_props; + struct pw_stream *sink; + struct spa_hook sink_listener; + void *play_buffer[SPA_AUDIO_MAX_CHANNELS]; + uint32_t play_ringsize; + struct spa_ringbuffer play_ring; + struct spa_ringbuffer play_delayed_ring; + struct spa_audio_info_raw sink_info; + + void *out_buffer[SPA_AUDIO_MAX_CHANNELS]; + uint32_t out_ringsize; + struct spa_ringbuffer out_ring; + + struct spa_audio_aec *aec; + uint32_t aec_blocksize; + + unsigned int capture_ready:1; + unsigned int sink_ready:1; + + unsigned int do_disconnect:1; + + uint32_t max_buffer_size; + uint32_t buffer_delay; + uint32_t current_delay; + + struct spa_handle *spa_handle; + struct spa_plugin_loader *loader; + + bool monitor_mode; +}; + +static void process(struct impl *impl) +{ + struct pw_buffer *cout; + struct pw_buffer *pout = NULL; + float rec_buf[impl->info.channels][impl->aec_blocksize / sizeof(float)]; + float play_buf[impl->info.channels][impl->aec_blocksize / sizeof(float)]; + float play_delayed_buf[impl->info.channels][impl->aec_blocksize / sizeof(float)]; + float out_buf[impl->info.channels][impl->aec_blocksize / sizeof(float)]; + const float *rec[impl->info.channels]; + const float *play[impl->info.channels]; + const float *play_delayed[impl->info.channels]; + float *out[impl->info.channels]; + struct spa_data *dd; + uint32_t i, size; + uint32_t rindex, pindex, oindex, pdindex, avail; + int32_t stride = 0; + + if (impl->playback != NULL && (pout = pw_stream_dequeue_buffer(impl->playback)) == NULL) { + pw_log_debug("out of playback buffers: %m"); + goto done; + } + + size = impl->aec_blocksize; + + /* First read a block from the playback and capture ring buffers */ + + spa_ringbuffer_get_read_index(&impl->rec_ring, &rindex); + spa_ringbuffer_get_read_index(&impl->play_ring, &pindex); + spa_ringbuffer_get_read_index(&impl->play_delayed_ring, &pdindex); + + for (i = 0; i < impl->info.channels; i++) { + /* captured samples, with echo from sink */ + rec[i] = &rec_buf[i][0]; + /* echo from sink */ + play[i] = &play_buf[i][0]; + /* echo from sink delayed */ + play_delayed[i] = &play_delayed_buf[i][0]; + /* filtered samples, without echo from sink */ + out[i] = &out_buf[i][0]; + + stride = 0; + spa_ringbuffer_read_data(&impl->rec_ring, impl->rec_buffer[i], + impl->rec_ringsize, rindex % impl->rec_ringsize, + (void*)rec[i], size); + + stride = 0; + spa_ringbuffer_read_data(&impl->play_ring, impl->play_buffer[i], + impl->play_ringsize, pindex % impl->play_ringsize, + (void *)play[i], size); + + stride = 0; + spa_ringbuffer_read_data(&impl->play_delayed_ring, impl->play_buffer[i], + impl->play_ringsize, pdindex % impl->play_ringsize, + (void *)play_delayed[i], size); + + if (pout != NULL) { + /* output to sink, just copy */ + dd = &pout->buffer->datas[i]; + memcpy(dd->data, play[i], size); + + dd->chunk->offset = 0; + dd->chunk->size = size; + dd->chunk->stride = stride; + } + } + + spa_ringbuffer_read_update(&impl->rec_ring, rindex + size); + spa_ringbuffer_read_update(&impl->play_ring, pindex + size); + spa_ringbuffer_read_update(&impl->play_delayed_ring, pdindex + size); + + if (impl->playback != NULL) + pw_stream_queue_buffer(impl->playback, pout); + + if (SPA_UNLIKELY (impl->current_delay < impl->buffer_delay)) { + uint32_t delay_left = impl->buffer_delay - impl->current_delay; + uint32_t silence_size; + + /* don't run the canceller until play_buffer has been filled, + * copy silence to output in the meantime */ + silence_size = SPA_MIN(size, delay_left * sizeof(float)); + for (i = 0; i < impl->info.channels; i++) + memset(out[i], 0, silence_size); + impl->current_delay += silence_size / sizeof(float); + pw_log_debug("current_delay %d", impl->current_delay); + + if (silence_size != size) { + const float *pd[impl->info.channels]; + float *o[impl->info.channels]; + + for (i = 0; i < impl->info.channels; i++) { + pd[i] = play_delayed[i] + delay_left; + o[i] = out[i] + delay_left; + } + spa_audio_aec_run(impl->aec, rec, pd, o, size / sizeof(float) - delay_left); + } + } else { + /* run the canceller */ + spa_audio_aec_run(impl->aec, rec, play_delayed, out, size / sizeof(float)); + } + + /* Next, copy over the output to the output ringbuffer */ + avail = spa_ringbuffer_get_write_index(&impl->out_ring, &oindex); + if (avail + size > impl->out_ringsize) { + uint32_t rindex, drop; + + /* Drop enough so we have size bytes left */ + drop = avail + size - impl->out_ringsize; + pw_log_debug("output ringbuffer xrun %d + %u > %u, dropping %u", + avail, size, impl->out_ringsize, drop); + + spa_ringbuffer_get_read_index(&impl->out_ring, &rindex); + spa_ringbuffer_read_update(&impl->out_ring, rindex + drop); + + avail += drop; + } + + for (i = 0; i < impl->info.channels; i++) { + /* captured samples, with echo from sink */ + spa_ringbuffer_write_data(&impl->out_ring, impl->out_buffer[i], + impl->out_ringsize, oindex % impl->out_ringsize, + (void *)out[i], size); + } + + spa_ringbuffer_write_update(&impl->out_ring, oindex + size); + + /* And finally take data from the output ringbuffer and make it + * available on the source */ + + avail = spa_ringbuffer_get_read_index(&impl->out_ring, &oindex); + while (avail >= size) { + if ((cout = pw_stream_dequeue_buffer(impl->source)) == NULL) { + pw_log_debug("out of source buffers: %m"); + break; + } + + for (i = 0; i < impl->info.channels; i++) { + dd = &cout->buffer->datas[i]; + spa_ringbuffer_read_data(&impl->out_ring, impl->out_buffer[i], + impl->out_ringsize, oindex % impl->out_ringsize, + (void *)dd->data, size); + dd->chunk->offset = 0; + dd->chunk->size = size; + dd->chunk->stride = 0; + } + + pw_stream_queue_buffer(impl->source, cout); + + oindex += size; + spa_ringbuffer_read_update(&impl->out_ring, oindex); + avail -= size; + } + +done: + impl->sink_ready = false; + impl->capture_ready = false; +} + +static void capture_destroy(void *d) +{ + struct impl *impl = d; + spa_hook_remove(&impl->capture_listener); + impl->capture = NULL; +} + +static void capture_process(void *data) +{ + struct impl *impl = data; + struct pw_buffer *buf; + struct spa_data *d; + uint32_t i, index, offs, size; + int32_t avail; + + if ((buf = pw_stream_dequeue_buffer(impl->capture)) == NULL) { + pw_log_debug("out of capture buffers: %m"); + return; + } + d = &buf->buffer->datas[0]; + + offs = SPA_MIN(d->chunk->offset, d->maxsize); + size = SPA_MIN(d->chunk->size, d->maxsize - offs); + + avail = spa_ringbuffer_get_write_index(&impl->rec_ring, &index); + + if (avail + size > impl->rec_ringsize) { + uint32_t rindex, drop; + + /* Drop enough so we have size bytes left */ + drop = avail + size - impl->rec_ringsize; + pw_log_debug("capture ringbuffer xrun %d + %u > %u, dropping %u", + avail, size, impl->rec_ringsize, drop); + + spa_ringbuffer_get_read_index(&impl->rec_ring, &rindex); + spa_ringbuffer_read_update(&impl->rec_ring, rindex + drop); + + avail += drop; + } + + /* If we don't know what size to push yet, use the canceller blocksize + * if it has a specific requirement, else keep the block size the same + * on input and output or what the resampler needs */ + if (impl->aec_blocksize == 0) { + impl->aec_blocksize = size; + pw_log_debug("Setting AEC block size to %u", impl->aec_blocksize); + } + + for (i = 0; i < impl->info.channels; i++) { + /* captured samples, with echo from sink */ + d = &buf->buffer->datas[i]; + + offs = SPA_MIN(d->chunk->offset, d->maxsize); + size = SPA_MIN(d->chunk->size, d->maxsize - offs); + + spa_ringbuffer_write_data(&impl->rec_ring, impl->rec_buffer[i], + impl->rec_ringsize, index % impl->rec_ringsize, + SPA_PTROFF(d->data, offs, void), size); + } + + spa_ringbuffer_write_update(&impl->rec_ring, index + size); + + if (avail + size >= impl->aec_blocksize) { + impl->capture_ready = true; + if (impl->sink_ready) + process(impl); + } + + pw_stream_queue_buffer(impl->capture, buf); +} + +static void capture_state_changed(void *data, enum pw_stream_state old, + enum pw_stream_state state, const char *error) +{ + struct impl *impl = data; + switch (state) { + case PW_STREAM_STATE_PAUSED: + pw_stream_flush(impl->source, false); + pw_stream_flush(impl->capture, false); + break; + case PW_STREAM_STATE_UNCONNECTED: + pw_log_info("%p: input unconnected", impl); + pw_impl_module_schedule_destroy(impl->module); + break; + case PW_STREAM_STATE_ERROR: + pw_log_info("%p: input error: %s", impl, error); + break; + default: + break; + } +} + +static void source_state_changed(void *data, enum pw_stream_state old, + enum pw_stream_state state, const char *error) +{ + struct impl *impl = data; + int res; + + switch (state) { + case PW_STREAM_STATE_PAUSED: + pw_stream_flush(impl->source, false); + pw_stream_flush(impl->capture, false); + + if (old == PW_STREAM_STATE_STREAMING) { + pw_log_debug("%p: deactivate %s", impl, impl->aec->name); + res = spa_audio_aec_deactivate(impl->aec); + if (res < 0 && res != -EOPNOTSUPP) { + pw_log_error("aec plugin %s deactivate failed: %s", impl->aec->name, spa_strerror(res)); + } + } + break; + case PW_STREAM_STATE_STREAMING: + pw_log_debug("%p: activate %s", impl, impl->aec->name); + res = spa_audio_aec_activate(impl->aec); + if (res < 0 && res != -EOPNOTSUPP) { + pw_log_error("aec plugin %s activate failed: %s", impl->aec->name, spa_strerror(res)); + } + break; + case PW_STREAM_STATE_UNCONNECTED: + pw_log_info("%p: input unconnected", impl); + pw_impl_module_schedule_destroy(impl->module); + break; + case PW_STREAM_STATE_ERROR: + pw_log_info("%p: input error: %s", impl, error); + break; + default: + break; + } +} + +static void input_param_latency_changed(struct impl *impl, const struct spa_pod *param) +{ + struct spa_latency_info latency; + uint8_t buffer[1024]; + struct spa_pod_builder b; + const struct spa_pod *params[1]; + + if (spa_latency_parse(param, &latency) < 0) + return; + + spa_pod_builder_init(&b, buffer, sizeof(buffer)); + params[0] = spa_latency_build(&b, SPA_PARAM_Latency, &latency); + + if (latency.direction == SPA_DIRECTION_INPUT) + pw_stream_update_params(impl->source, params, 1); + else + pw_stream_update_params(impl->capture, params, 1); +} +static struct spa_pod* get_props_param(struct impl* impl, struct spa_pod_builder* b) +{ + if (spa_audio_aec_get_params(impl->aec, NULL) > 0) { + struct spa_pod_frame f[2]; + spa_pod_builder_push_object( + b, &f[0], SPA_TYPE_OBJECT_Props, SPA_PARAM_Props); + spa_pod_builder_prop(b, SPA_PROP_params, 0); + spa_pod_builder_push_struct(b, &f[1]); + + spa_audio_aec_get_params(impl->aec, b); + + spa_pod_builder_pop(b, &f[1]); + return spa_pod_builder_pop(b, &f[0]); + } + return NULL; +} + +static void input_param_changed(void *data, uint32_t id, const struct spa_pod* param) +{ + struct spa_pod_object* obj = (struct spa_pod_object*)param; + const struct spa_pod_prop* prop; + struct impl* impl = data; + switch (id) { + case SPA_PARAM_Latency: + input_param_latency_changed(impl, param); + break; + case SPA_PARAM_Props: + if (param != NULL) { + uint8_t buffer[1024]; + struct spa_pod_dynamic_builder b; + const struct spa_pod* params[1]; + SPA_POD_OBJECT_FOREACH(obj, prop) + { + if (prop->key == SPA_PROP_params) { + spa_audio_aec_set_params(impl->aec, &prop->value); + } + } + + spa_pod_dynamic_builder_init(&b, buffer, sizeof(buffer), 4096); + params[0] = get_props_param(impl, &b.b); + if (params[0]) { + pw_stream_update_params(impl->capture, params, 1); + pw_stream_update_params(impl->playback, params, 1); + } + spa_pod_dynamic_builder_clean(&b); + } else { + pw_log_warn("param is null"); + } + break; + } +} + +static const struct pw_stream_events capture_events = { + PW_VERSION_STREAM_EVENTS, + .destroy = capture_destroy, + .state_changed = capture_state_changed, + .process = capture_process, + .param_changed = input_param_changed +}; + +static void source_destroy(void *d) +{ + struct impl *impl = d; + spa_hook_remove(&impl->source_listener); + impl->source = NULL; +} + +static const struct pw_stream_events source_events = { + PW_VERSION_STREAM_EVENTS, + .destroy = source_destroy, + .state_changed = source_state_changed, + .param_changed = input_param_changed +}; + +static void output_state_changed(void *data, enum pw_stream_state old, + enum pw_stream_state state, const char *error) +{ + struct impl *impl = data; + switch (state) { + case PW_STREAM_STATE_PAUSED: + pw_stream_flush(impl->sink, false); + if (impl->playback != NULL) + pw_stream_flush(impl->playback, false); + if (old == PW_STREAM_STATE_STREAMING) { + impl->current_delay = 0; + } + break; + case PW_STREAM_STATE_UNCONNECTED: + pw_log_info("%p: output unconnected", impl); + pw_impl_module_schedule_destroy(impl->module); + break; + case PW_STREAM_STATE_ERROR: + pw_log_info("%p: output error: %s", impl, error); + break; + default: + break; + } +} + +static void output_param_latency_changed(struct impl *impl, const struct spa_pod *param) +{ + struct spa_latency_info latency; + uint8_t buffer[1024]; + struct spa_pod_builder b; + const struct spa_pod *params[1]; + + if (spa_latency_parse(param, &latency) < 0) + return; + + spa_pod_builder_init(&b, buffer, sizeof(buffer)); + params[0] = spa_latency_build(&b, SPA_PARAM_Latency, &latency); + + if (latency.direction == SPA_DIRECTION_INPUT) + pw_stream_update_params(impl->sink, params, 1); + else if (impl->playback != NULL) + pw_stream_update_params(impl->playback, params, 1); +} + +static void output_param_changed(void *data, uint32_t id, const struct spa_pod *param) +{ + struct spa_pod_object *obj = (struct spa_pod_object *) param; + const struct spa_pod_prop *prop; + struct impl *impl = data; + switch (id) { + case SPA_PARAM_Latency: + output_param_latency_changed(impl, param); + break; + case SPA_PARAM_Props: + if (param != NULL) { + uint8_t buffer[1024]; + struct spa_pod_dynamic_builder b; + const struct spa_pod* params[1]; + + SPA_POD_OBJECT_FOREACH(obj, prop) + { + if (prop->key == SPA_PROP_params) { + spa_audio_aec_set_params(impl->aec, &prop->value); + } + } + spa_pod_dynamic_builder_init(&b, buffer, sizeof(buffer), 4096); + params[0] = get_props_param(impl, &b.b); + if (params[0] != NULL) { + pw_stream_update_params(impl->capture, params, 1); + pw_stream_update_params(impl->playback, params, 1); + } + spa_pod_dynamic_builder_clean(&b); + } + break; + } +} + +static void sink_destroy(void *d) +{ + struct impl *impl = d; + spa_hook_remove(&impl->sink_listener); + impl->sink = NULL; +} + +static void sink_process(void *data) +{ + struct impl *impl = data; + struct pw_buffer *buf; + struct spa_data *d; + uint32_t i, index, offs, size; + int32_t avail; + + if ((buf = pw_stream_dequeue_buffer(impl->sink)) == NULL) { + pw_log_debug("out of sink buffers: %m"); + return; + } + d = &buf->buffer->datas[0]; + + offs = SPA_MIN(d->chunk->offset, d->maxsize); + size = SPA_MIN(d->chunk->size, d->maxsize - offs); + + avail = spa_ringbuffer_get_write_index(&impl->play_ring, &index); + + if (avail + size > impl->play_ringsize) { + uint32_t rindex, drop; + + /* Drop enough so we have size bytes left */ + drop = avail + size - impl->play_ringsize; + pw_log_debug("sink ringbuffer xrun %d + %u > %u, dropping %u", + avail, size, impl->play_ringsize, drop); + + spa_ringbuffer_get_read_index(&impl->play_ring, &rindex); + spa_ringbuffer_read_update(&impl->play_ring, rindex + drop); + + spa_ringbuffer_get_read_index(&impl->play_delayed_ring, &rindex); + spa_ringbuffer_read_update(&impl->play_delayed_ring, rindex + drop); + + avail += drop; + } + + if (impl->aec_blocksize == 0) { + impl->aec_blocksize = size; + pw_log_debug("Setting AEC block size to %u", impl->aec_blocksize); + } + + for (i = 0; i < impl->info.channels; i++) { + /* echo from sink */ + d = &buf->buffer->datas[i]; + + offs = SPA_MIN(d->chunk->offset, d->maxsize); + size = SPA_MIN(d->chunk->size, d->maxsize - offs); + + spa_ringbuffer_write_data(&impl->play_ring, impl->play_buffer[i], + impl->play_ringsize, index % impl->play_ringsize, + SPA_PTROFF(d->data, offs, void), size); + } + spa_ringbuffer_write_update(&impl->play_ring, index + size); + + if (avail + size >= impl->aec_blocksize) { + impl->sink_ready = true; + if (impl->capture_ready) + process(impl); + } + + pw_stream_queue_buffer(impl->sink, buf); +} + +static void playback_destroy(void *d) +{ + struct impl *impl = d; + if (impl->playback != NULL) { + spa_hook_remove(&impl->playback_listener); + impl->playback = NULL; + } +} + +static const struct pw_stream_events playback_events = { + PW_VERSION_STREAM_EVENTS, + .destroy = playback_destroy, + .state_changed = output_state_changed, + .param_changed = output_param_changed +}; +static const struct pw_stream_events sink_events = { + PW_VERSION_STREAM_EVENTS, + .destroy = sink_destroy, + .process = sink_process, + .state_changed = output_state_changed, + .param_changed = output_param_changed +}; + +static int setup_streams(struct impl *impl) +{ + int res; + uint32_t n_params, i; + uint32_t offsets[512]; + const struct spa_pod *params[512]; + struct spa_pod_dynamic_builder b; + uint32_t index; + + impl->capture = pw_stream_new(impl->core, + "Echo-Cancel Capture", impl->capture_props); + impl->capture_props = NULL; + if (impl->capture == NULL) + return -errno; + + pw_stream_add_listener(impl->capture, + &impl->capture_listener, + &capture_events, impl); + + impl->source = pw_stream_new(impl->core, + "Echo-Cancel Source", impl->source_props); + impl->source_props = NULL; + if (impl->source == NULL) + return -errno; + + pw_stream_add_listener(impl->source, + &impl->source_listener, + &source_events, impl); + + if (impl->monitor_mode) { + impl->playback = NULL; + } else { + impl->playback = pw_stream_new(impl->core, + "Echo-Cancel Playback", impl->playback_props); + impl->playback_props = NULL; + if (impl->playback == NULL) + return -errno; + + pw_stream_add_listener(impl->playback, + &impl->playback_listener, + &playback_events, impl); + } + + impl->sink = pw_stream_new(impl->core, + "Echo-Cancel Sink", impl->sink_props); + impl->sink_props = NULL; + if (impl->sink == NULL) + return -errno; + + pw_stream_add_listener(impl->sink, + &impl->sink_listener, + &sink_events, impl); + + n_params = 0; + spa_pod_dynamic_builder_init(&b, NULL, 0, 4096); + + offsets[n_params++] = b.b.state.offset; + spa_format_audio_raw_build(&b.b, SPA_PARAM_EnumFormat, &impl->capture_info); + + int nbr_of_external_props = spa_audio_aec_enum_props(impl->aec, 0, NULL); + if (nbr_of_external_props > 0) { + for (int i = 0; i < nbr_of_external_props; i++) { + offsets[n_params++] = b.b.state.offset; + spa_audio_aec_enum_props(impl->aec, i, &b.b); + } + get_props_param(impl, &b.b); + } + + for (i = 0; i < n_params; i++) + params[i] = spa_pod_builder_deref(&b.b, offsets[i]); + + if ((res = pw_stream_connect(impl->capture, + PW_DIRECTION_INPUT, + PW_ID_ANY, + PW_STREAM_FLAG_AUTOCONNECT | + PW_STREAM_FLAG_MAP_BUFFERS | + PW_STREAM_FLAG_RT_PROCESS, + params, n_params)) < 0) { + spa_pod_dynamic_builder_clean(&b); + return res; + } + + offsets[0] = b.b.state.offset; + spa_format_audio_raw_build(&b.b, SPA_PARAM_EnumFormat, &impl->source_info); + + for (i = 0; i < n_params; i++) + params[i] = spa_pod_builder_deref(&b.b, offsets[i]); + + if ((res = pw_stream_connect(impl->source, + PW_DIRECTION_OUTPUT, + PW_ID_ANY, + PW_STREAM_FLAG_MAP_BUFFERS | + PW_STREAM_FLAG_RT_PROCESS, + params, n_params)) < 0) { + spa_pod_dynamic_builder_clean(&b); + return res; + } + + offsets[0] = b.b.state.offset; + spa_format_audio_raw_build(&b.b, SPA_PARAM_EnumFormat, &impl->sink_info); + + for (i = 0; i < n_params; i++) + params[i] = spa_pod_builder_deref(&b.b, offsets[i]); + + if ((res = pw_stream_connect(impl->sink, + PW_DIRECTION_INPUT, + PW_ID_ANY, + impl->playback != NULL ? + PW_STREAM_FLAG_MAP_BUFFERS | PW_STREAM_FLAG_RT_PROCESS : + PW_STREAM_FLAG_AUTOCONNECT | PW_STREAM_FLAG_MAP_BUFFERS | PW_STREAM_FLAG_RT_PROCESS, + params, n_params)) < 0) { + spa_pod_dynamic_builder_clean(&b); + return res; + } + + offsets[0] = b.b.state.offset; + spa_format_audio_raw_build(&b.b, SPA_PARAM_EnumFormat, &impl->playback_info); + + for (i = 0; i < n_params; i++) + params[i] = spa_pod_builder_deref(&b.b, offsets[i]); + + if (impl->playback != NULL && (res = pw_stream_connect(impl->playback, + PW_DIRECTION_OUTPUT, + PW_ID_ANY, + PW_STREAM_FLAG_AUTOCONNECT | + PW_STREAM_FLAG_MAP_BUFFERS | + PW_STREAM_FLAG_RT_PROCESS, + params, n_params)) < 0) { + spa_pod_dynamic_builder_clean(&b); + return res; + } + + spa_pod_dynamic_builder_clean(&b); + + impl->rec_ringsize = sizeof(float) * impl->max_buffer_size * impl->info.rate / 1000; + impl->play_ringsize = sizeof(float) * ((impl->max_buffer_size * impl->info.rate / 1000) + impl->buffer_delay); + impl->out_ringsize = sizeof(float) * impl->max_buffer_size * impl->info.rate / 1000; + for (i = 0; i < impl->info.channels; i++) { + impl->rec_buffer[i] = malloc(impl->rec_ringsize); + impl->play_buffer[i] = malloc(impl->play_ringsize); + impl->out_buffer[i] = malloc(impl->out_ringsize); + } + spa_ringbuffer_init(&impl->rec_ring); + spa_ringbuffer_init(&impl->play_ring); + spa_ringbuffer_init(&impl->play_delayed_ring); + spa_ringbuffer_init(&impl->out_ring); + + spa_ringbuffer_get_write_index(&impl->play_ring, &index); + spa_ringbuffer_write_update(&impl->play_ring, index + (sizeof(float) * (impl->buffer_delay))); + spa_ringbuffer_get_read_index(&impl->play_ring, &index); + spa_ringbuffer_read_update(&impl->play_ring, index + (sizeof(float) * (impl->buffer_delay))); + + return 0; +} + +static void core_error(void *data, uint32_t id, int seq, int res, const char *message) +{ + struct impl *impl = data; + + if (res == -ENOENT) { + pw_log_info("id:%u seq:%d res:%d (%s): %s", + id, seq, res, spa_strerror(res), message); + } else { + pw_log_warn("error id:%u seq:%d res:%d (%s): %s", + id, seq, res, spa_strerror(res), message); + } + + if (id == PW_ID_CORE && res == -EPIPE) + pw_impl_module_schedule_destroy(impl->module); +} + +static const struct pw_core_events core_events = { + PW_VERSION_CORE_EVENTS, + .error = core_error, +}; + +static void core_destroy(void *d) +{ + struct impl *impl = d; + spa_hook_remove(&impl->core_listener); + impl->core = NULL; + pw_impl_module_schedule_destroy(impl->module); +} + +static const struct pw_proxy_events core_proxy_events = { + .destroy = core_destroy, +}; + +static void impl_destroy(struct impl *impl) +{ + uint32_t i; + if (impl->capture) + pw_stream_destroy(impl->capture); + if (impl->source) + pw_stream_destroy(impl->source); + if (impl->playback) + pw_stream_destroy(impl->playback); + if (impl->sink) + pw_stream_destroy(impl->sink); + if (impl->core && impl->do_disconnect) + pw_core_disconnect(impl->core); + if (impl->spa_handle) + spa_plugin_loader_unload(impl->loader, impl->spa_handle); + pw_properties_free(impl->capture_props); + pw_properties_free(impl->source_props); + pw_properties_free(impl->playback_props); + pw_properties_free(impl->sink_props); + + for (i = 0; i < impl->info.channels; i++) { + if (impl->rec_buffer[i]) + free(impl->rec_buffer[i]); + if (impl->play_buffer[i]) + free(impl->play_buffer[i]); + if (impl->out_buffer[i]) + free(impl->out_buffer[i]); + } + + free(impl); +} + +static void module_destroy(void *data) +{ + struct impl *impl = data; + spa_hook_remove(&impl->module_listener); + impl_destroy(impl); +} + +static const struct pw_impl_module_events module_events = { + PW_VERSION_IMPL_MODULE_EVENTS, + .destroy = module_destroy, +}; + +static uint32_t channel_from_name(const char *name) +{ + int i; + for (i = 0; spa_type_audio_channel[i].name; i++) { + if (spa_streq(name, spa_debug_type_short_name(spa_type_audio_channel[i].name))) + return spa_type_audio_channel[i].type; + } + return SPA_AUDIO_CHANNEL_UNKNOWN; +} + +static void parse_position(struct spa_audio_info_raw *info, const char *val, size_t len) +{ + struct spa_json it[2]; + char v[256]; + + spa_json_init(&it[0], val, len); + if (spa_json_enter_array(&it[0], &it[1]) <= 0) + spa_json_init(&it[1], val, len); + + info->channels = 0; + while (spa_json_get_string(&it[1], v, sizeof(v)) > 0 && + info->channels < SPA_AUDIO_MAX_CHANNELS) { + info->position[info->channels++] = channel_from_name(v); + } +} + +static void parse_audio_info(struct pw_properties *props, struct spa_audio_info_raw *info) +{ + const char *str; + + *info = SPA_AUDIO_INFO_RAW_INIT( + .format = SPA_AUDIO_FORMAT_F32P); + info->rate = pw_properties_get_uint32(props, PW_KEY_AUDIO_RATE, info->rate); + if (info->rate == 0) + info->rate = DEFAULT_RATE; + + info->channels = pw_properties_get_uint32(props, PW_KEY_AUDIO_CHANNELS, info->channels); + info->channels = SPA_MIN(info->channels, SPA_AUDIO_MAX_CHANNELS); + if ((str = pw_properties_get(props, SPA_KEY_AUDIO_POSITION)) != NULL) + parse_position(info, str, strlen(str)); + if (info->channels == 0) + parse_position(info, DEFAULT_POSITION, strlen(DEFAULT_POSITION)); +} + +static void copy_props(struct impl *impl, struct pw_properties *props, const char *key) +{ + const char *str; + if ((str = pw_properties_get(props, key)) != NULL) { + if (pw_properties_get(impl->capture_props, key) == NULL) + pw_properties_set(impl->capture_props, key, str); + if (pw_properties_get(impl->source_props, key) == NULL) + pw_properties_set(impl->source_props, key, str); + if (pw_properties_get(impl->playback_props, key) == NULL) + pw_properties_set(impl->playback_props, key, str); + if (pw_properties_get(impl->sink_props, key) == NULL) + pw_properties_set(impl->sink_props, key, str); + } +} + +SPA_EXPORT +int pipewire__module_init(struct pw_impl_module *module, const char *args) +{ + struct pw_context *context = pw_impl_module_get_context(module); + struct pw_properties *props, *aec_props; + struct impl *impl; + uint32_t id = pw_global_get_id(pw_impl_module_get_global(module)); + uint32_t pid = getpid(); + const char *str; + const char *path; + int res = 0; + struct spa_handle *handle = NULL; + void *iface; + + PW_LOG_TOPIC_INIT(mod_topic); + + impl = calloc(1, sizeof(struct impl)); + if (impl == NULL) + return -errno; + + pw_log_debug("module %p: new %s", impl, args); + + if (args) + props = pw_properties_new_string(args); + else + props = pw_properties_new(NULL, NULL); + if (props == NULL) { + res = -errno; + pw_log_error( "can't create properties: %m"); + goto error; + } + + impl->capture_props = pw_properties_new(NULL, NULL); + impl->source_props = pw_properties_new(NULL, NULL); + impl->playback_props = pw_properties_new(NULL, NULL); + impl->sink_props = pw_properties_new(NULL, NULL); + if (impl->source_props == NULL || impl->sink_props == NULL || + impl->capture_props == NULL || impl->playback_props == NULL) { + res = -errno; + pw_log_error( "can't create properties: %m"); + goto error; + } + + impl->monitor_mode = false; + if ((str = pw_properties_get(props, "monitor.mode")) != NULL) + impl->monitor_mode = pw_properties_parse_bool(str); + + impl->module = module; + impl->context = context; + + if (pw_properties_get(props, PW_KEY_NODE_GROUP) == NULL) + pw_properties_setf(props, PW_KEY_NODE_GROUP, "echo-cancel-%u-%u", pid, id); + if (pw_properties_get(props, PW_KEY_NODE_LINK_GROUP) == NULL) + pw_properties_setf(props, PW_KEY_NODE_LINK_GROUP, "echo-cancel-%u-%u", pid, id); + if (pw_properties_get(props, PW_KEY_NODE_VIRTUAL) == NULL) + pw_properties_set(props, PW_KEY_NODE_VIRTUAL, "true"); + if (pw_properties_get(props, "resample.prefill") == NULL) + pw_properties_set(props, "resample.prefill", "true"); + + parse_audio_info(props, &impl->info); + + impl->capture_info = impl->info; + impl->source_info = impl->info; + impl->sink_info = impl->info; + impl->playback_info = impl->info; + + if ((str = pw_properties_get(props, "capture.props")) != NULL) + pw_properties_update_string(impl->capture_props, str, strlen(str)); + if ((str = pw_properties_get(props, "source.props")) != NULL) + pw_properties_update_string(impl->source_props, str, strlen(str)); + if ((str = pw_properties_get(props, "sink.props")) != NULL) + pw_properties_update_string(impl->sink_props, str, strlen(str)); + if ((str = pw_properties_get(props, "playback.props")) != NULL) + pw_properties_update_string(impl->playback_props, str, strlen(str)); + + if (pw_properties_get(impl->capture_props, PW_KEY_NODE_NAME) == NULL) + pw_properties_set(impl->capture_props, PW_KEY_NODE_NAME, "echo-cancel-capture"); + if (pw_properties_get(impl->capture_props, PW_KEY_NODE_DESCRIPTION) == NULL) + pw_properties_set(impl->capture_props, PW_KEY_NODE_DESCRIPTION, "Echo-Cancel Capture"); + if (pw_properties_get(impl->capture_props, PW_KEY_NODE_PASSIVE) == NULL) + pw_properties_set(impl->capture_props, PW_KEY_NODE_PASSIVE, "true"); + + if (pw_properties_get(impl->source_props, PW_KEY_NODE_NAME) == NULL) + pw_properties_set(impl->source_props, PW_KEY_NODE_NAME, "echo-cancel-source"); + if (pw_properties_get(impl->source_props, PW_KEY_NODE_DESCRIPTION) == NULL) + pw_properties_set(impl->source_props, PW_KEY_NODE_DESCRIPTION, "Echo-Cancel Source"); + if (pw_properties_get(impl->source_props, PW_KEY_MEDIA_CLASS) == NULL) + pw_properties_set(impl->source_props, PW_KEY_MEDIA_CLASS, "Audio/Source"); + + if (pw_properties_get(impl->playback_props, PW_KEY_NODE_NAME) == NULL) + pw_properties_set(impl->playback_props, PW_KEY_NODE_NAME, "echo-cancel-playback"); + if (pw_properties_get(impl->playback_props, PW_KEY_NODE_DESCRIPTION) == NULL) + pw_properties_set(impl->playback_props, PW_KEY_NODE_DESCRIPTION, "Echo-Cancel Playback"); + if (pw_properties_get(impl->playback_props, PW_KEY_NODE_PASSIVE) == NULL) + pw_properties_set(impl->playback_props, PW_KEY_NODE_PASSIVE, "true"); + + if (pw_properties_get(impl->sink_props, PW_KEY_NODE_NAME) == NULL) + pw_properties_set(impl->sink_props, PW_KEY_NODE_NAME, "echo-cancel-sink"); + if (pw_properties_get(impl->sink_props, PW_KEY_NODE_DESCRIPTION) == NULL) + pw_properties_set(impl->sink_props, PW_KEY_NODE_DESCRIPTION, "Echo-Cancel Sink"); + if (pw_properties_get(impl->sink_props, PW_KEY_MEDIA_CLASS) == NULL) + pw_properties_set(impl->sink_props, PW_KEY_MEDIA_CLASS, + impl->monitor_mode ? "Stream/Input/Audio" : "Audio/Sink"); + if (impl->monitor_mode) { + if (pw_properties_get(impl->sink_props, PW_KEY_NODE_PASSIVE) == NULL) + pw_properties_set(impl->sink_props, PW_KEY_NODE_PASSIVE, "true"); + if (pw_properties_get(impl->sink_props, PW_KEY_STREAM_MONITOR) == NULL) + pw_properties_set(impl->sink_props, PW_KEY_STREAM_MONITOR, "true"); + if (pw_properties_get(impl->sink_props, PW_KEY_STREAM_CAPTURE_SINK) == NULL) + pw_properties_set(impl->sink_props, PW_KEY_STREAM_CAPTURE_SINK, "true"); + } + + if ((str = pw_properties_get(props, "aec.method")) != NULL) + pw_log_warn("aec.method is not supported anymore use library.name"); + + /* Use webrtc as default */ + if ((path = pw_properties_get(props, "library.name")) == NULL) + path = "aec/libspa-aec-webrtc"; + + const struct spa_support *support; + uint32_t n_support; + + support = pw_context_get_support(context, &n_support); + impl->loader = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_PluginLoader); + if (impl->loader == NULL) { + pw_log_error("a plugin loader is needed"); + return -EINVAL; + } + + struct spa_dict_item info_items[] = { + { SPA_KEY_LIBRARY_NAME, path }, + }; + struct spa_dict info = SPA_DICT_INIT_ARRAY(info_items); + + handle = spa_plugin_loader_load(impl->loader, SPA_NAME_AEC, &info); + if (handle == NULL) { + pw_log_error("aec plugin %s not available library.name %s", SPA_NAME_AEC, path); + return -ENOENT; + } + + if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_AUDIO_AEC, &iface)) < 0) { + pw_log_error("can't get %s interface %d", SPA_TYPE_INTERFACE_AUDIO_AEC, res); + return res; + } + impl->aec = iface; + impl->spa_handle = handle; + + if (impl->aec->iface.version > SPA_VERSION_AUDIO_AEC) { + pw_log_error("codec plugin %s has incompatible ABI version (%d > %d)", + SPA_NAME_AEC, impl->aec->iface.version, SPA_VERSION_AUDIO_AEC); + res = -ENOENT; + goto error; + } + + pw_log_info("Using plugin AEC %s with version %d", impl->aec->name, + impl->aec->iface.version); + + if ((str = pw_properties_get(props, "aec.args")) != NULL) + aec_props = pw_properties_new_string(str); + else + aec_props = pw_properties_new(NULL, NULL); + + res = spa_audio_aec_init(impl->aec, &aec_props->dict, &impl->info); + + pw_properties_free(aec_props); + + if (res < 0) { + pw_log_error("aec plugin %s create failed: %s", impl->aec->name, + spa_strerror(res)); + goto error; + } + + if (impl->aec->latency) { + unsigned int num, denom, req_num, req_denom; + unsigned int factor = 0; + unsigned int new_num = 0; + + spa_assert_se(sscanf(impl->aec->latency, "%u/%u", &num, &denom) == 2); + + if ((str = pw_properties_get(props, PW_KEY_NODE_LATENCY)) != NULL) { + sscanf(str, "%u/%u", &req_num, &req_denom); + factor = (req_num * denom) / (req_denom * num); + new_num = req_num / factor * factor; + } + + if (factor == 0 || new_num == 0) { + pw_log_info("Setting node latency to %s", impl->aec->latency); + pw_properties_set(props, PW_KEY_NODE_LATENCY, impl->aec->latency); + impl->aec_blocksize = sizeof(float) * impl->info.rate * num / denom; + } else { + pw_log_info("Setting node latency to %u/%u", new_num, req_denom); + pw_properties_setf(props, PW_KEY_NODE_LATENCY, "%u/%u", new_num, req_denom); + impl->aec_blocksize = sizeof(float) * impl->info.rate * num / denom * factor; + } + } else { + /* Implementation doesn't care about the block size */ + impl->aec_blocksize = 0; + } + + impl->core = pw_context_get_object(impl->context, PW_TYPE_INTERFACE_Core); + if (impl->core == NULL) { + str = pw_properties_get(props, PW_KEY_REMOTE_NAME); + impl->core = pw_context_connect(impl->context, + pw_properties_new( + PW_KEY_REMOTE_NAME, str, + NULL), + 0); + impl->do_disconnect = true; + } + if (impl->core == NULL) { + res = -errno; + pw_log_error("can't connect: %m"); + goto error; + } + + copy_props(impl, props, PW_KEY_NODE_GROUP); + copy_props(impl, props, PW_KEY_NODE_LINK_GROUP); + copy_props(impl, props, PW_KEY_NODE_VIRTUAL); + copy_props(impl, props, PW_KEY_NODE_LATENCY); + copy_props(impl, props, SPA_KEY_AUDIO_CHANNELS); + copy_props(impl, props, SPA_KEY_AUDIO_POSITION); + copy_props(impl, props, "resample.prefill"); + + if ((str = pw_properties_get(impl->capture_props, SPA_KEY_AUDIO_POSITION)) != NULL) + parse_position(&impl->capture_info, str, strlen(str)); + if ((str = pw_properties_get(impl->source_props, SPA_KEY_AUDIO_POSITION)) != NULL) + parse_position(&impl->source_info, str, strlen(str)); + if ((str = pw_properties_get(impl->sink_props, SPA_KEY_AUDIO_POSITION)) != NULL) + parse_position(&impl->sink_info, str, strlen(str)); + if ((str = pw_properties_get(impl->playback_props, SPA_KEY_AUDIO_POSITION)) != NULL) + parse_position(&impl->playback_info, str, strlen(str)); + + if (impl->capture_info.channels != impl->info.channels) + impl->capture_info = impl->info; + if (impl->source_info.channels != impl->info.channels) + impl->source_info = impl->info; + if (impl->sink_info.channels != impl->info.channels) + impl->sink_info = impl->info; + if (impl->playback_info.channels != impl->info.channels) + impl->playback_info = impl->info; + + impl->max_buffer_size = pw_properties_get_uint32(props,"buffer.max_size", MAX_BUFSIZE_MS); + + if ((str = pw_properties_get(props, "buffer.play_delay")) != NULL) { + int req_num, req_denom; + if (sscanf(str, "%u/%u", &req_num, &req_denom) == 2) { + if (req_denom != 0) { + impl->buffer_delay = (impl->info.rate*req_num)/req_denom; + } else { + impl->buffer_delay = DELAY_MS * impl->info.rate / 1000; + pw_log_warn("Sample rate for buffer.play_delay is 0 using default"); + } + } else { + impl->buffer_delay = DELAY_MS * impl->info.rate / 1000; + pw_log_warn("Wrong value/format for buffer.play_delay using default"); + } + } else { + impl->buffer_delay = DELAY_MS * impl->info.rate / 1000; + } + + pw_properties_free(props); + + pw_proxy_add_listener((struct pw_proxy*)impl->core, + &impl->core_proxy_listener, + &core_proxy_events, impl); + pw_core_add_listener(impl->core, + &impl->core_listener, + &core_events, impl); + + setup_streams(impl); + + pw_impl_module_add_listener(module, &impl->module_listener, &module_events, impl); + + pw_impl_module_update_properties(module, &SPA_DICT_INIT_ARRAY(module_props)); + + return 0; + +error: + pw_properties_free(props); + impl_destroy(impl); + return res; +} |