mirrors/pulseaudio
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git synced 2025-11-03 09:01:50 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

Get notifications about mixer changes from ALSA.

Browse source 
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@607 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Pierre Ossman 2006-02-26 21:50:55 +00:00
parent ae07d5abd5
commit 1e68539dc4
4 changed files with 114 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

44
src/modules/module-alsa-source.c
View file

@ -57,7 +57,8 @@ struct userdata {
snd_mixer_t *mixer_handle;
snd_mixer_elem_t *mixer_elem;
pa_source *source;
struct pa_alsa_fdlist *fdl;
struct pa_alsa_fdlist *pcm_fdl;
struct pa_alsa_fdlist *mixer_fdl;
long hw_volume_max, hw_volume_min;
size_t frame_size, fragment_size;
@ -153,6 +154,24 @@ static void fdl_callback(void *userdata) {
do_read(u);
}
static int mixer_callback(snd_mixer_elem_t *elem, unsigned int mask) {
struct userdata *u = snd_mixer_elem_get_callback_private(elem);
assert(u && u->mixer_handle);
if (mask & SND_CTL_EVENT_MASK_VALUE) {
if (u->source->get_hw_volume)
u->source->get_hw_volume(u->source);
if (u->source->get_hw_mute)
u->source->get_hw_mute(u->source);
pa_subscription_post(u->source->core,
PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE,
u->source->index);
}
return 0;
}
static pa_usec_t source_get_latency_cb(pa_source *s) {
struct userdata *u = s->userdata;
snd_pcm_sframes_t frames;
@ -349,13 +368,24 @@ int pa__init(pa_core *c, pa_module*m) {
pa_source_set_owner(u->source, m);
u->source->description = pa_sprintf_malloc("Advanced Linux Sound Architecture PCM on '%s'", dev);
u->fdl = pa_alsa_fdlist_new();
assert(u->fdl);
if (pa_alsa_fdlist_init_pcm(u->fdl, u->pcm_handle, c->mainloop, fdl_callback, u) < 0) {
u->pcm_fdl = pa_alsa_fdlist_new();
assert(u->pcm_fdl);
if (pa_alsa_fdlist_init_pcm(u->pcm_fdl, u->pcm_handle, c->mainloop, fdl_callback, u) < 0) {
pa_log(__FILE__": failed to initialise file descriptor monitoring");
goto fail;
}
if (u->mixer_handle) {
u->mixer_fdl = pa_alsa_fdlist_new();
assert(u->mixer_fdl);
if (pa_alsa_fdlist_init_mixer(u->mixer_fdl, u->mixer_handle, c->mainloop) < 0) {
pa_log(__FILE__": failed to initialise file descriptor monitoring");
goto fail;
}
snd_mixer_elem_set_callback(u->mixer_elem, mixer_callback);
snd_mixer_elem_set_callback_private(u->mixer_elem, u);
}
u->frame_size = frame_size;
u->fragment_size = period_size;
@ -400,8 +430,10 @@ void pa__done(pa_core *c, pa_module*m) {
pa_source_unref(u->source);
}
if (u->fdl)
pa_alsa_fdlist_free(u->fdl);
if (u->pcm_fdl)
pa_alsa_fdlist_free(u->pcm_fdl);
if (u->mixer_fdl)
pa_alsa_fdlist_free(u->mixer_fdl);
if (u->mixer_handle)
snd_mixer_close(u->mixer_handle);