Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

ALSA: ctxfi: Implement channel maps

Browse source 
Assign the multi-channel map to front PCM, and other channel map to
each other channel PCM.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2012-08-03 18:03:17 +02:00
parent f49921b894
commit 8d50cdc1f5
1 changed files with 50 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

50
sound/pci/ctxfi/ctpcm.c
View file

@ -395,12 +395,38 @@ static struct snd_pcm_ops ct_pcm_capture_ops = {
.page = snd_pcm_sgbuf_ops_page,
};
static const struct snd_pcm_chmap_elem surround_map[] = {
{ .channels = 1,
.map = { SNDRV_CHMAP_RC } },
{ .channels = 2,
.map = { SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
{ }
};
static const struct snd_pcm_chmap_elem clfe_map[] = {
{ .channels = 1,
.map = { SNDRV_CHMAP_FC } },
{ .channels = 2,
.map = { SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } },
{ }
};
static const struct snd_pcm_chmap_elem side_map[] = {
{ .channels = 1,
.map = { SNDRV_CHMAP_RC } },
{ .channels = 2,
.map = { SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } },
{ }
};
/* Create ALSA pcm device */
int ct_alsa_pcm_create(struct ct_atc *atc,
enum CTALSADEVS device,
const char *device_name)
{
struct snd_pcm *pcm;
const struct snd_pcm_chmap_elem *map;
int chs;
int err;
int playback_count, capture_count;
@ -427,6 +453,30 @@ int ct_alsa_pcm_create(struct ct_atc *atc,
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
snd_dma_pci_data(atc->pci), 128*1024, 128*1024);
chs = 2;
switch (device) {
case FRONT:
chs = 8;
map = snd_pcm_std_chmaps;
break;
case SURROUND:
map = surround_map;
break;
case CLFE:
map = clfe_map;
break;
case SIDE:
map = side_map;
break;
default:
map = snd_pcm_std_chmaps;
break;
}
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK, map, chs,
0, NULL);
if (err < 0)
return err;
#ifdef CONFIG_PM_SLEEP
atc->pcms[device] = pcm;
#endif