mirrors/pipewire
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/pipewire/pipewire.git synced 2025-11-04 13:30:12 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

module-loopback: add target.delay.sec property

Browse source 
Add a target.delay.sec property to module-loopback that uses a
ringbuffer to further delay the signal to the requested value. This
also takes into account the graph delay to get an end-to-end delay.

Add a -d property to pw-loopback to control this.

Implement latency_msec on the pulse module with this new property so
that it behaves similar to pulseaudio.
This commit is contained in:
Wim Taymans 2022-10-20 16:02:28 +02:00
parent 35c9650e0e
commit 24b113e2d3
3 changed files with 137 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

17
src/modules/module-protocol-pulse/modules/module-loopback.c
View file

@ -47,6 +47,7 @@ struct module_loopback_data {
struct pw_properties *playback_props;
struct spa_audio_info_raw info;
uint32_t latency_msec;
};
static void module_destroy(void *data)
@ -68,6 +69,7 @@ static int module_loopback_load(struct client *client, struct module *module)
FILE *f;
char *args;
size_t size, i;
char val[256];
pw_properties_setf(data->capture_props, PW_KEY_NODE_GROUP, "loopback-%u", module->index);
pw_properties_setf(data->playback_props, PW_KEY_NODE_GROUP, "loopback-%u", module->index);
@ -88,6 +90,10 @@ static int module_loopback_load(struct client *client, struct module *module)
fprintf(f, " ]");
}
}
if (data->latency_msec != 0)
fprintf(f, " target.delay.sec = %s",
spa_json_format_float(val, sizeof(val),
data->latency_msec / 1000.0f));
fprintf(f, " capture.props = {");
pw_properties_serialize_dict(f, &data->capture_props->dict, 0);
fprintf(f, " } playback.props = {");
@ -204,15 +210,8 @@ static int module_loopback_prepare(struct module * const module)
pw_properties_set(props, "remix", NULL);
}
if ((str = pw_properties_get(props, "latency_msec")) != NULL) {
/* Half the latency on each of the playback and capture streams */
pw_properties_setf(capture_props, PW_KEY_NODE_LATENCY, "%s/2000", str);
pw_properties_setf(playback_props, PW_KEY_NODE_LATENCY, "%s/2000", str);
pw_properties_set(props, "latency_msec", NULL);
} else {
pw_properties_set(capture_props, PW_KEY_NODE_LATENCY, "100/1000");
pw_properties_set(playback_props, PW_KEY_NODE_LATENCY, "100/1000");
}
if ((str = pw_properties_get(props, "latency_msec")) != NULL)
d->latency_msec = atoi(str);
if ((str = pw_properties_get(props, "sink_input_properties")) != NULL) {
module_args_add_props(playback_props, str);