744 lines
21 KiB
C
744 lines
21 KiB
C
/* PipeWire */
|
|
/* SPDX-FileCopyrightText: Copyright © 2021 Wim Taymans */
|
|
/* SPDX-License-Identifier: MIT */
|
|
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
|
|
#include "config.h"
|
|
|
|
#include <spa/utils/result.h>
|
|
#include <spa/utils/string.h>
|
|
#include <spa/utils/json.h>
|
|
#include <spa/utils/ringbuffer.h>
|
|
#include <spa/param/latency-utils.h>
|
|
#include <spa/debug/types.h>
|
|
|
|
#include <pipewire/impl.h>
|
|
#include <pipewire/extensions/profiler.h>
|
|
|
|
/** \page page_module_loopback PipeWire Module: Loopback
|
|
*
|
|
* The loopback module passes the output of a capture stream unmodified to a playback stream.
|
|
* It can be used to construct a link between a source and sink but also to
|
|
* create new virtual sinks or sources or to remap channel between streams.
|
|
*
|
|
* Because both ends of the loopback are built with streams, the session manager can
|
|
* manage the configuration and connection with the sinks and sources.
|
|
*
|
|
* ## Module Options
|
|
*
|
|
* - `node.description`: a human readable name for the loopback streams
|
|
* - `target.delay.sec`: delay in seconds as float (Since 0.3.60)
|
|
* - `capture.props = {}`: properties to be passed to the input stream
|
|
* - `playback.props = {}`: properties to be passed to the output stream
|
|
*
|
|
* ## General options
|
|
*
|
|
* Options with well-known behavior. Most options can be added to the global
|
|
* configuration or the individual streams:
|
|
*
|
|
* - \ref PW_KEY_REMOTE_NAME
|
|
* - \ref PW_KEY_AUDIO_RATE
|
|
* - \ref PW_KEY_AUDIO_CHANNELS
|
|
* - \ref SPA_KEY_AUDIO_POSITION
|
|
* - \ref PW_KEY_MEDIA_NAME
|
|
* - \ref PW_KEY_NODE_LATENCY
|
|
* - \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_NAME: See notes below. If not specified, defaults to
|
|
* 'loopback-<pid>-<module-id>'.
|
|
*
|
|
* Stream only properties:
|
|
*
|
|
* - \ref PW_KEY_MEDIA_CLASS
|
|
* - \ref PW_KEY_NODE_NAME: if not given per stream, the global node.name will be
|
|
* prefixed with 'input.' and 'output.' to generate a capture and playback
|
|
* stream node.name respectively.
|
|
*
|
|
* ## Example configuration of a virtual sink
|
|
*
|
|
* This Virtual sink routes stereo input to the rear channels of a 7.1 sink.
|
|
*
|
|
*\code{.unparsed}
|
|
* context.modules = [
|
|
* { name = libpipewire-module-loopback
|
|
* args = {
|
|
* node.description = "CM106 Stereo Pair 2"
|
|
* #target.delay.sec = 1.5
|
|
* capture.props = {
|
|
* node.name = "CM106_stereo_pair_2"
|
|
* media.class = "Audio/Sink"
|
|
* audio.position = [ FL FR ]
|
|
* }
|
|
* playback.props = {
|
|
* node.name = "playback.CM106_stereo_pair_2"
|
|
* audio.position = [ RL RR ]
|
|
* target.object = "alsa_output.usb-0d8c_USB_Sound_Device-00.analog-surround-71"
|
|
* node.dont-reconnect = true
|
|
* stream.dont-remix = true
|
|
* node.passive = true
|
|
* }
|
|
* }
|
|
* }
|
|
* ]
|
|
*\endcode
|
|
*
|
|
* ## Example configuration of a virtual source
|
|
*
|
|
* This Virtual source routes the front-left channel of a multi-channel input to a mono channel.
|
|
* This is useful for splitting up multi-channel inputs from USB audio interfaces that are not yet fully supported by alsa.
|
|
*
|
|
*\code{.unparsed}
|
|
* context.modules = [
|
|
* { name = libpipewire-module-loopback
|
|
* args = {
|
|
* node.description = "Scarlett Focusrite Line 1"
|
|
* capture.props = {
|
|
* audio.position = [ FL ]
|
|
* stream.dont-remix = true
|
|
* node.target = "alsa_input.usb-Focusrite_Scarlett_Solo_USB_Y7ZD17C24495BC-00.analog-stereo"
|
|
* node.passive = true
|
|
* }
|
|
* playback.props = {
|
|
* node.name = "SF_mono_in_1"
|
|
* media.class = "Audio/Source"
|
|
* audio.position = [ MONO ]
|
|
* }
|
|
* }
|
|
* }
|
|
* ]
|
|
*\endcode
|
|
*
|
|
* ## See also
|
|
*
|
|
* `pw-loopback` : a tool that loads the loopback module with given parameters.
|
|
*/
|
|
|
|
#define NAME "loopback"
|
|
|
|
PW_LOG_TOPIC_STATIC(mod_topic, "mod." NAME);
|
|
#define PW_LOG_TOPIC_DEFAULT mod_topic
|
|
|
|
static const struct spa_dict_item module_props[] = {
|
|
{ PW_KEY_MODULE_AUTHOR, "Wim Taymans <wim.taymans@gmail.com>" },
|
|
{ PW_KEY_MODULE_DESCRIPTION, "Create loopback streams" },
|
|
{ PW_KEY_MODULE_USAGE, " ( remote.name=<remote> ) "
|
|
"( node.latency=<latency as fraction> ) "
|
|
"( node.description=<description of the nodes> ) "
|
|
"( audio.rate=<sample rate> ) "
|
|
"( audio.channels=<number of channels> ) "
|
|
"( audio.position=<channel map> ) "
|
|
"( target.delay.sec=<delay as seconds in float> ) "
|
|
"( capture.props=<properties> ) "
|
|
"( playback.props=<properties> ) " },
|
|
{ PW_KEY_MODULE_VERSION, PACKAGE_VERSION },
|
|
};
|
|
|
|
#include <stdlib.h>
|
|
#include <signal.h>
|
|
#include <getopt.h>
|
|
#include <limits.h>
|
|
#include <math.h>
|
|
|
|
#include <spa/pod/builder.h>
|
|
#include <spa/param/audio/format-utils.h>
|
|
#include <spa/param/audio/raw.h>
|
|
|
|
#include <pipewire/pipewire.h>
|
|
|
|
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 pw_properties *capture_props;
|
|
struct pw_stream *capture;
|
|
struct spa_hook capture_listener;
|
|
struct spa_audio_info_raw capture_info;
|
|
struct spa_latency_info capture_latency;
|
|
|
|
struct pw_properties *playback_props;
|
|
struct pw_stream *playback;
|
|
struct spa_hook playback_listener;
|
|
struct spa_audio_info_raw playback_info;
|
|
struct spa_latency_info playback_latency;
|
|
|
|
unsigned int do_disconnect:1;
|
|
unsigned int recalc_delay:1;
|
|
|
|
float target_delay;
|
|
struct spa_ringbuffer buffer;
|
|
uint8_t *buffer_data;
|
|
uint32_t buffer_size;
|
|
};
|
|
|
|
static void capture_destroy(void *d)
|
|
{
|
|
struct impl *impl = d;
|
|
spa_hook_remove(&impl->capture_listener);
|
|
impl->capture = NULL;
|
|
}
|
|
|
|
static void recalculate_delay(struct impl *impl)
|
|
{
|
|
uint32_t target = impl->capture_info.rate * impl->target_delay, cdelay, pdelay;
|
|
uint32_t delay, w;
|
|
struct pw_time pwt;
|
|
|
|
pw_stream_get_time_n(impl->playback, &pwt, sizeof(pwt));
|
|
pdelay = pwt.delay;
|
|
pw_stream_get_time_n(impl->capture, &pwt, sizeof(pwt));
|
|
cdelay = pwt.delay;
|
|
|
|
delay = target - SPA_MIN(target, pdelay + cdelay);
|
|
delay = SPA_MIN(delay, impl->buffer_size / 4);
|
|
|
|
spa_ringbuffer_get_write_index(&impl->buffer, &w);
|
|
spa_ringbuffer_read_update(&impl->buffer, w - (delay * 4));
|
|
|
|
pw_log_info("target:%d c:%d + p:%d + delay:%d = (%d)",
|
|
target, cdelay, pdelay, delay,
|
|
cdelay + pdelay + delay);
|
|
}
|
|
|
|
static void capture_process(void *d)
|
|
{
|
|
struct impl *impl = d;
|
|
pw_stream_trigger_process(impl->playback);
|
|
}
|
|
|
|
static void playback_process(void *d)
|
|
{
|
|
struct impl *impl = d;
|
|
struct pw_buffer *in, *out;
|
|
uint32_t i;
|
|
|
|
if (impl->recalc_delay) {
|
|
recalculate_delay(impl);
|
|
impl->recalc_delay = false;
|
|
}
|
|
|
|
if ((in = pw_stream_dequeue_buffer(impl->capture)) == NULL)
|
|
pw_log_debug("out of capture buffers: %m");
|
|
|
|
if ((out = pw_stream_dequeue_buffer(impl->playback)) == NULL)
|
|
pw_log_debug("out of playback buffers: %m");
|
|
|
|
if (in != NULL && out != NULL) {
|
|
uint32_t outsize = UINT32_MAX;
|
|
int32_t stride = 0;
|
|
struct spa_data *d;
|
|
const void *src[in->buffer->n_datas];
|
|
uint32_t r, w, buffer_size;
|
|
|
|
for (i = 0; i < in->buffer->n_datas; i++) {
|
|
uint32_t offs, size;
|
|
|
|
d = &in->buffer->datas[i];
|
|
offs = SPA_MIN(d->chunk->offset, d->maxsize);
|
|
size = SPA_MIN(d->chunk->size, d->maxsize - offs);
|
|
|
|
src[i] = SPA_PTROFF(d->data, offs, void);
|
|
outsize = SPA_MIN(outsize, size);
|
|
stride = SPA_MAX(stride, d->chunk->stride);
|
|
}
|
|
if (impl->buffer_size > 0) {
|
|
buffer_size = impl->buffer_size;
|
|
spa_ringbuffer_get_write_index(&impl->buffer, &w);
|
|
for (i = 0; i < in->buffer->n_datas; i++) {
|
|
void *buffer_data = &impl->buffer_data[i * buffer_size];
|
|
spa_ringbuffer_write_data(&impl->buffer,
|
|
buffer_data, buffer_size,
|
|
w % buffer_size, src[i], outsize);
|
|
src[i] = buffer_data;
|
|
}
|
|
w += outsize;
|
|
spa_ringbuffer_write_update(&impl->buffer, w);
|
|
spa_ringbuffer_get_read_index(&impl->buffer, &r);
|
|
} else {
|
|
r = 0;
|
|
buffer_size = outsize;
|
|
}
|
|
for (i = 0; i < out->buffer->n_datas; i++) {
|
|
d = &out->buffer->datas[i];
|
|
|
|
outsize = SPA_MIN(outsize, d->maxsize);
|
|
|
|
if (i < in->buffer->n_datas)
|
|
spa_ringbuffer_read_data(&impl->buffer,
|
|
src[i], buffer_size,
|
|
r % buffer_size,
|
|
d->data, outsize);
|
|
else
|
|
memset(d->data, 0, outsize);
|
|
|
|
d->chunk->offset = 0;
|
|
d->chunk->size = outsize;
|
|
d->chunk->stride = stride;
|
|
}
|
|
if (impl->buffer_size > 0) {
|
|
r += outsize;
|
|
spa_ringbuffer_read_update(&impl->buffer, r);
|
|
}
|
|
}
|
|
|
|
if (in != NULL)
|
|
pw_stream_queue_buffer(impl->capture, in);
|
|
if (out != NULL)
|
|
pw_stream_queue_buffer(impl->playback, out);
|
|
}
|
|
|
|
static void param_latency_changed(struct impl *impl, const struct spa_pod *param,
|
|
struct spa_latency_info *info, struct pw_stream *other)
|
|
{
|
|
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;
|
|
|
|
*info = latency;
|
|
|
|
spa_pod_builder_init(&b, buffer, sizeof(buffer));
|
|
params[0] = spa_latency_build(&b, SPA_PARAM_Latency, &latency);
|
|
pw_stream_update_params(other, params, 1);
|
|
|
|
impl->recalc_delay = true;
|
|
}
|
|
|
|
static void stream_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->playback, false);
|
|
pw_stream_flush(impl->capture, false);
|
|
impl->recalc_delay = true;
|
|
break;
|
|
case PW_STREAM_STATE_UNCONNECTED:
|
|
pw_log_info("module %p: unconnected", impl);
|
|
pw_impl_module_schedule_destroy(impl->module);
|
|
break;
|
|
case PW_STREAM_STATE_ERROR:
|
|
pw_log_info("module %p: error: %s", impl, error);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void recalculate_buffer(struct impl *impl)
|
|
{
|
|
if (impl->target_delay > 0.0f) {
|
|
uint32_t delay = impl->capture_info.rate * impl->target_delay;
|
|
void *data;
|
|
|
|
impl->buffer_size = (delay + (1u<<15)) * 4;
|
|
data = realloc(impl->buffer_data, impl->buffer_size * impl->capture_info.channels);
|
|
if (data == NULL) {
|
|
pw_log_warn("can't allocate delay buffer, delay disabled: %m");
|
|
impl->buffer_size = 0;
|
|
free(impl->buffer_data);
|
|
}
|
|
impl->buffer_data = data;
|
|
spa_ringbuffer_init(&impl->buffer);
|
|
} else {
|
|
impl->buffer_size = 0;
|
|
free(impl->buffer_data);
|
|
impl->buffer_data = NULL;
|
|
}
|
|
pw_log_info("configured delay:%f buffer:%d", impl->target_delay, impl->buffer_size);
|
|
impl->recalc_delay = true;
|
|
}
|
|
|
|
static void capture_param_changed(void *data, uint32_t id, const struct spa_pod *param)
|
|
{
|
|
struct impl *impl = data;
|
|
|
|
switch (id) {
|
|
case SPA_PARAM_Format:
|
|
{
|
|
struct spa_audio_info_raw info;
|
|
if (param == NULL)
|
|
return;
|
|
if (spa_format_audio_raw_parse(param, &info) < 0)
|
|
return;
|
|
if (info.rate == 0 ||
|
|
info.channels == 0 ||
|
|
info.channels > SPA_AUDIO_MAX_CHANNELS)
|
|
return;
|
|
|
|
impl->capture_info = info;
|
|
recalculate_buffer(impl);
|
|
break;
|
|
}
|
|
case SPA_PARAM_Latency:
|
|
param_latency_changed(impl, param, &impl->capture_latency, impl->playback);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static const struct pw_stream_events in_stream_events = {
|
|
PW_VERSION_STREAM_EVENTS,
|
|
.destroy = capture_destroy,
|
|
.process = capture_process,
|
|
.state_changed = stream_state_changed,
|
|
.param_changed = capture_param_changed,
|
|
};
|
|
|
|
static void playback_destroy(void *d)
|
|
{
|
|
struct impl *impl = d;
|
|
spa_hook_remove(&impl->playback_listener);
|
|
impl->playback = NULL;
|
|
}
|
|
|
|
static void playback_param_changed(void *data, uint32_t id, const struct spa_pod *param)
|
|
{
|
|
struct impl *impl = data;
|
|
|
|
switch (id) {
|
|
case SPA_PARAM_Latency:
|
|
param_latency_changed(impl, param, &impl->playback_latency, impl->capture);
|
|
break;
|
|
}
|
|
}
|
|
static const struct pw_stream_events out_stream_events = {
|
|
PW_VERSION_STREAM_EVENTS,
|
|
.destroy = playback_destroy,
|
|
.process = playback_process,
|
|
.state_changed = stream_state_changed,
|
|
.param_changed = playback_param_changed,
|
|
};
|
|
|
|
static int setup_streams(struct impl *impl)
|
|
{
|
|
int res;
|
|
uint32_t n_params;
|
|
const struct spa_pod *params[1];
|
|
uint8_t buffer[1024];
|
|
struct spa_pod_builder b;
|
|
|
|
impl->capture = pw_stream_new(impl->core,
|
|
"loopback capture", impl->capture_props);
|
|
impl->capture_props = NULL;
|
|
if (impl->capture == NULL)
|
|
return -errno;
|
|
|
|
pw_stream_add_listener(impl->capture,
|
|
&impl->capture_listener,
|
|
&in_stream_events, impl);
|
|
|
|
impl->playback = pw_stream_new(impl->core,
|
|
"loopback playback", impl->playback_props);
|
|
impl->playback_props = NULL;
|
|
if (impl->playback == NULL)
|
|
return -errno;
|
|
|
|
pw_stream_add_listener(impl->playback,
|
|
&impl->playback_listener,
|
|
&out_stream_events, impl);
|
|
|
|
/* connect playback first to activate it before capture triggers it */
|
|
n_params = 0;
|
|
spa_pod_builder_init(&b, buffer, sizeof(buffer));
|
|
params[n_params++] = spa_format_audio_raw_build(&b, SPA_PARAM_EnumFormat,
|
|
&impl->playback_info);
|
|
if ((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 |
|
|
PW_STREAM_FLAG_TRIGGER,
|
|
params, n_params)) < 0)
|
|
return res;
|
|
|
|
n_params = 0;
|
|
spa_pod_builder_init(&b, buffer, sizeof(buffer));
|
|
params[n_params++] = spa_format_audio_raw_build(&b, SPA_PARAM_EnumFormat,
|
|
&impl->capture_info);
|
|
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)
|
|
return res;
|
|
|
|
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("message 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)
|
|
{
|
|
/* deactivate both streams before destroying any of them */
|
|
if (impl->capture)
|
|
pw_stream_set_active(impl->capture, false);
|
|
if (impl->playback)
|
|
pw_stream_set_active(impl->playback, false);
|
|
|
|
if (impl->capture)
|
|
pw_stream_destroy(impl->capture);
|
|
if (impl->playback)
|
|
pw_stream_destroy(impl->playback);
|
|
|
|
if (impl->core && impl->do_disconnect)
|
|
pw_core_disconnect(impl->core);
|
|
|
|
pw_properties_free(impl->capture_props);
|
|
pw_properties_free(impl->playback_props);
|
|
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_int32(props, PW_KEY_AUDIO_RATE, 0);
|
|
info->channels = pw_properties_get_uint32(props, PW_KEY_AUDIO_CHANNELS, 0);
|
|
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));
|
|
}
|
|
|
|
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->playback_props, key) == NULL)
|
|
pw_properties_set(impl->playback_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;
|
|
struct impl *impl;
|
|
uint32_t id = pw_global_get_id(pw_impl_module_get_global(module));
|
|
uint32_t pid = getpid();
|
|
const char *str;
|
|
int res;
|
|
|
|
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->playback_props = pw_properties_new(NULL, NULL);
|
|
if (impl->capture_props == NULL || impl->playback_props == NULL) {
|
|
res = -errno;
|
|
pw_log_error( "can't create properties: %m");
|
|
goto error;
|
|
}
|
|
|
|
impl->module = module;
|
|
impl->context = context;
|
|
|
|
if (pw_properties_get(props, PW_KEY_NODE_GROUP) == NULL)
|
|
pw_properties_setf(props, PW_KEY_NODE_GROUP, "loopback-%u-%u", pid, id);
|
|
if (pw_properties_get(props, PW_KEY_NODE_LINK_GROUP) == NULL)
|
|
pw_properties_setf(props, PW_KEY_NODE_LINK_GROUP, "loopback-%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");
|
|
|
|
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, "playback.props")) != NULL)
|
|
pw_properties_update_string(impl->playback_props, str, strlen(str));
|
|
|
|
if ((str = pw_properties_get(props, "target.delay.sec")) != NULL)
|
|
spa_atof(str, &impl->target_delay);
|
|
if (impl->target_delay > 0.0f &&
|
|
pw_properties_get(props, PW_KEY_NODE_LATENCY) == NULL)
|
|
/* a source and sink (USB) usually have a 1.5 quantum delay, so we use
|
|
* a 2 times smaller quantum to compensate */
|
|
pw_properties_setf(props, PW_KEY_NODE_LATENCY, "%u/%u",
|
|
(unsigned)(impl->target_delay * 48000 / 3), 48000);
|
|
|
|
copy_props(impl, props, PW_KEY_AUDIO_RATE);
|
|
copy_props(impl, props, PW_KEY_AUDIO_CHANNELS);
|
|
copy_props(impl, props, SPA_KEY_AUDIO_POSITION);
|
|
copy_props(impl, props, PW_KEY_NODE_DESCRIPTION);
|
|
copy_props(impl, props, PW_KEY_NODE_GROUP);
|
|
copy_props(impl, props, PW_KEY_NODE_LINK_GROUP);
|
|
copy_props(impl, props, PW_KEY_NODE_LATENCY);
|
|
copy_props(impl, props, PW_KEY_NODE_VIRTUAL);
|
|
copy_props(impl, props, PW_KEY_MEDIA_NAME);
|
|
copy_props(impl, props, "resample.prefill");
|
|
|
|
if ((str = pw_properties_get(props, PW_KEY_NODE_NAME)) == NULL) {
|
|
pw_properties_setf(props, PW_KEY_NODE_NAME,
|
|
"loopback-%u-%u", pid, id);
|
|
str = pw_properties_get(props, PW_KEY_NODE_NAME);
|
|
}
|
|
if (pw_properties_get(impl->capture_props, PW_KEY_NODE_NAME) == NULL)
|
|
pw_properties_setf(impl->capture_props, PW_KEY_NODE_NAME,
|
|
"input.%s", str);
|
|
if (pw_properties_get(impl->playback_props, PW_KEY_NODE_NAME) == NULL)
|
|
pw_properties_setf(impl->playback_props, PW_KEY_NODE_NAME,
|
|
"output.%s", str);
|
|
if (pw_properties_get(impl->capture_props, PW_KEY_NODE_DESCRIPTION) == NULL)
|
|
pw_properties_set(impl->capture_props, PW_KEY_NODE_DESCRIPTION, str);
|
|
if (pw_properties_get(impl->playback_props, PW_KEY_NODE_DESCRIPTION) == NULL)
|
|
pw_properties_set(impl->playback_props, PW_KEY_NODE_DESCRIPTION, str);
|
|
|
|
parse_audio_info(impl->capture_props, &impl->capture_info);
|
|
parse_audio_info(impl->playback_props, &impl->playback_info);
|
|
|
|
if (pw_properties_get(impl->capture_props, PW_KEY_MEDIA_NAME) == NULL)
|
|
pw_properties_setf(impl->capture_props, PW_KEY_MEDIA_NAME, "%s input",
|
|
pw_properties_get(impl->capture_props, PW_KEY_NODE_DESCRIPTION));
|
|
if (pw_properties_get(impl->playback_props, PW_KEY_MEDIA_NAME) == NULL)
|
|
pw_properties_setf(impl->playback_props, PW_KEY_MEDIA_NAME, "%s output",
|
|
pw_properties_get(impl->playback_props, PW_KEY_NODE_DESCRIPTION));
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|