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alsa: implement query_chmaps

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This commit is contained in:
Wim Taymans 2018-10-10 15:32:08 +02:00
parent 9955e32030
commit 7303f2c1a0
1 changed files with 48 additions and 3 deletions
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51
alsa-plugins/pcm_pipewire.c
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@ -462,8 +462,16 @@ static int snd_pcm_pipewire_stop(snd_pcm_ioplug_t *io)
static int set_default_channels(struct spa_audio_info_raw *info)
{
switch (info->channels) {
case 1:
info->position[0] = SPA_AUDIO_CHANNEL_MONO;
case 7:
info->position[5] = SPA_AUDIO_CHANNEL_SL;
info->position[6] = SPA_AUDIO_CHANNEL_SR;
/* Fall through */
case 5:
info->position[3] = SPA_AUDIO_CHANNEL_RL;
info->position[4] = SPA_AUDIO_CHANNEL_RR;
info->position[2] = SPA_AUDIO_CHANNEL_FC;
info->position[0] = SPA_AUDIO_CHANNEL_FL;
info->position[1] = SPA_AUDIO_CHANNEL_FR;
return 1;
case 8:
info->position[6] = SPA_AUDIO_CHANNEL_SL;
@ -477,12 +485,15 @@ static int set_default_channels(struct spa_audio_info_raw *info)
info->position[3] = SPA_AUDIO_CHANNEL_LFE;
/* Fall through */
case 3:
/* Fall through */
info->position[2] = SPA_AUDIO_CHANNEL_FC;
/* Fall through */
case 2:
info->position[0] = SPA_AUDIO_CHANNEL_FL;
info->position[1] = SPA_AUDIO_CHANNEL_FR;
return 1;
case 1:
info->position[0] = SPA_AUDIO_CHANNEL_MONO;
return 1;
default:
return 0;
}
@ -633,6 +644,39 @@ static snd_pcm_chmap_t * snd_pcm_pipewire_get_chmap(snd_pcm_ioplug_t * io)
return map;
}
static void make_map(snd_pcm_chmap_query_t **maps, int index, int channels, ...)
{
va_list args;
int i;
maps[index] = malloc(sizeof(snd_pcm_chmap_query_t) + (channels * sizeof(unsigned int)));
maps[index]->type = SND_CHMAP_TYPE_FIXED;
maps[index]->map.channels = channels;
va_start(args, channels);
for (i = 0; i < channels; i++)
maps[index]->map.pos[i] = va_arg(args, int);
va_end(args);
}
static snd_pcm_chmap_query_t **snd_pcm_pipewire_query_chmaps(snd_pcm_ioplug_t *io)
{
snd_pcm_chmap_query_t **maps;
maps = calloc(9, sizeof(*maps));
make_map(maps, 0, 1, SND_CHMAP_MONO);
make_map(maps, 1, 2, SND_CHMAP_FL, SND_CHMAP_FR);
make_map(maps, 2, 3, SND_CHMAP_FL, SND_CHMAP_FR, SND_CHMAP_FC);
make_map(maps, 3, 4, SND_CHMAP_FL, SND_CHMAP_FR, SND_CHMAP_FC, SND_CHMAP_LFE);
make_map(maps, 4, 5, SND_CHMAP_FL, SND_CHMAP_FR, SND_CHMAP_FC, SND_CHMAP_RL, SND_CHMAP_RR);
make_map(maps, 5, 6, SND_CHMAP_FL, SND_CHMAP_FR, SND_CHMAP_FC, SND_CHMAP_LFE, SND_CHMAP_RL, SND_CHMAP_RR);
make_map(maps, 6, 7, SND_CHMAP_FL, SND_CHMAP_FR, SND_CHMAP_FC,
SND_CHMAP_SL, SND_CHMAP_SR, SND_CHMAP_RL, SND_CHMAP_RR);
make_map(maps, 7, 8, SND_CHMAP_FL, SND_CHMAP_FR, SND_CHMAP_FC, SND_CHMAP_LFE,
SND_CHMAP_SL, SND_CHMAP_SR, SND_CHMAP_RL, SND_CHMAP_RR);
return maps;
}
static snd_pcm_ioplug_callback_t pipewire_pcm_callback = {
.close = snd_pcm_pipewire_close,
.start = snd_pcm_pipewire_start,
@ -643,6 +687,7 @@ static snd_pcm_ioplug_callback_t pipewire_pcm_callback = {
.hw_params = snd_pcm_pipewire_hw_params,
.set_chmap = snd_pcm_pipewire_set_chmap,
.get_chmap = snd_pcm_pipewire_get_chmap,
.query_chmaps = snd_pcm_pipewire_query_chmaps,
};
static int pipewire_set_hw_constraint(snd_pcm_pipewire_t *pw)