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sink, source: Add a way to change channel map

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This adds functions to allow changing the channel map on a sink or
source. We make module-null-sink use this function instead of changing
the channel map manually to allow for logging and notifications.

The source function is currently unused but we add it to maintain
symmetry with the sink.
This commit is contained in:
Arun Raghavan 2022-01-12 13:22:31 -05:00
parent e4a085f6d3
commit 47298b8de8
5 changed files with 54 additions and 3 deletions
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23
src/pulsecore/sink.c
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@ -4083,6 +4083,29 @@ 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_channel_map(pa_sink *s, pa_channel_map *map) {
pa_channel_map old_map;
char old_map_str[PA_CHANNEL_MAP_SNPRINT_MAX];
char new_map_str[PA_CHANNEL_MAP_SNPRINT_MAX];
pa_assert(s);
pa_assert(map);
pa_assert(pa_channel_map_valid(map));
old_map = s->channel_map;
if (pa_channel_map_equal(&old_map, map))
return;
pa_log_info("%s: channel map: %s -> %s", s->name,
pa_channel_map_snprint(old_map_str, sizeof(old_map_str), &old_map),
pa_channel_map_snprint(new_map_str, sizeof(new_map_str), map));
s->channel_map = *map;
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK | PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
}
/* Called from the main thread. */
void pa_sink_set_reference_volume_direct(pa_sink *s, const pa_cvolume *volume) {
pa_cvolume old_volume;