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sink, source: Add API to change channel count

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This makes this part symmetrical with the rest of the sample spec, and
will be useful when we implement switching channel count in a sink.
This commit is contained in:
Arun Raghavan 2022-01-12 13:22:34 -05:00
parent f9d139c3bc
commit 4693028b9b
4 changed files with 38 additions and 0 deletions
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18
src/pulsecore/sink.c
View file

@ -4083,6 +4083,24 @@ void pa_sink_set_sample_rate(pa_sink *s, uint32_t rate) {
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK | PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
}
/* Called from the main thread */
void pa_sink_set_channels(pa_sink *s, uint8_t channels) {
uint8_t old_channels;
pa_assert(s);
pa_assert(pa_channels_valid(channels));
old_channels = s->sample_spec.channels;
if (old_channels == channels)
return;
pa_log_info("%s: channels: %u -> %u", s->name, old_channels, channels);
s->sample_spec.channels = channels;
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK | PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
}
/* Called from the main thread */
void pa_sink_set_channel_map(pa_sink *s, pa_channel_map *map) {
pa_channel_map old_map;

1
src/pulsecore/sink.h
View file

@ -529,6 +529,7 @@ pa_idxset* pa_sink_check_formats(pa_sink *s, pa_idxset *in_formats);
void pa_sink_set_sample_format(pa_sink *s, pa_sample_format_t format);
void pa_sink_set_sample_rate(pa_sink *s, uint32_t rate);
void pa_sink_set_channels(pa_sink *s, uint8_t channels);
void pa_sink_set_channel_map(pa_sink *s, pa_channel_map *map);
/*** To be called exclusively by the sink driver, from IO context */

18
src/pulsecore/source.c
View file

@ -3077,6 +3077,24 @@ void pa_source_set_sample_rate(pa_source *s, uint32_t rate) {
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
}
/* Called from the main thread */
void pa_source_set_channels(pa_source *s, uint8_t channels) {
uint8_t old_channels;
pa_assert(s);
pa_assert(pa_channels_valid(channels));
old_channels = s->sample_spec.channels;
if (old_channels == channels)
return;
pa_log_info("%s: channels: %u -> %u", s->name, old_channels, channels);
s->sample_spec.channels = channels;
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
}
/* Called from the main thread */
void pa_source_set_channel_map(pa_source *s, pa_channel_map *map) {
pa_channel_map old_map;

1
src/pulsecore/source.h
View file

@ -450,6 +450,7 @@ pa_idxset* pa_source_check_formats(pa_source *s, pa_idxset *in_formats);
void pa_source_set_sample_format(pa_source *s, pa_sample_format_t format);
void pa_source_set_sample_rate(pa_source *s, uint32_t rate);
void pa_source_set_channels(pa_source *s, uint8_t channels);
void pa_source_set_channel_map(pa_source *s, pa_channel_map *map);
/*** To be called exclusively by the source driver, from IO context */