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alsa: add params to set default internal latency

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This commit is contained in:
Wim Taymans 2021-08-17 10:15:40 +02:00
parent 6d196b1d11
commit a2083d12d4
3 changed files with 11 additions and 0 deletions
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4
spa/plugins/alsa/alsa-pcm-sink.c
View file

@ -881,6 +881,10 @@ impl_init(const struct spa_handle_factory *factory,
this->default_format = spa_alsa_format_from_name(s, strlen(s)); this->default_format = spa_alsa_format_from_name(s, strlen(s));
} else if (spa_streq(k, SPA_KEY_AUDIO_POSITION)) { } else if (spa_streq(k, SPA_KEY_AUDIO_POSITION)) {
spa_alsa_parse_position(&this->default_pos, s, strlen(s)); spa_alsa_parse_position(&this->default_pos, s, strlen(s));
} else if (spa_streq(k, "latency.internal.rate")) {
this->process_latency.rate = atoi(s);
} else if (spa_streq(k, "latency.internal.ns")) {
this->process_latency.ns = atoi(s);
} else if (spa_streq(k, "api.alsa.period-size")) { } else if (spa_streq(k, "api.alsa.period-size")) {
this->default_period_size = atoi(s); this->default_period_size = atoi(s);
} else if (spa_streq(k, "api.alsa.headroom")) { } else if (spa_streq(k, "api.alsa.headroom")) {

4
spa/plugins/alsa/alsa-pcm-source.c
View file

@ -891,6 +891,10 @@ impl_init(const struct spa_handle_factory *factory,
this->default_format = spa_alsa_format_from_name(s, strlen(s)); this->default_format = spa_alsa_format_from_name(s, strlen(s));
} else if (spa_streq(k, SPA_KEY_AUDIO_POSITION)) { } else if (spa_streq(k, SPA_KEY_AUDIO_POSITION)) {
spa_alsa_parse_position(&this->default_pos, s, strlen(s)); spa_alsa_parse_position(&this->default_pos, s, strlen(s));
} else if (spa_streq(k, "latency.internal.rate")) {
this->process_latency.rate = atoi(s);
} else if (spa_streq(k, "latency.internal.ns")) {
this->process_latency.ns = atoi(s);
} else if (spa_streq(k, "api.alsa.period-size")) { } else if (spa_streq(k, "api.alsa.period-size")) {
this->default_period_size = atoi(s); this->default_period_size = atoi(s);
} else if (spa_streq(k, "api.alsa.headroom")) { } else if (spa_streq(k, "api.alsa.headroom")) {

3
src/daemon/media-session.d/alsa-monitor.conf
View file

@ -102,6 +102,9 @@ rules = [
#session.suspend-timeout-seconds = 5 # 0 disables suspend #session.suspend-timeout-seconds = 5 # 0 disables suspend
#monitor.channel-volumes = false #monitor.channel-volumes = false
#latency.internal.rate = 256 # internal latency in samples
#latency.internal.ns = 256 # internal latency in nanoseconds
#api.alsa.period-size = 1024 #api.alsa.period-size = 1024
#api.alsa.headroom = 0 #api.alsa.headroom = 0
#api.alsa.start-delay = 0 #api.alsa.start-delay = 0