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ALSA: ymfpci: Define channel maps

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Provide channel maps for individual stereo streams of YMFPCI.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2012-09-12 16:14:37 +02:00
parent 7fb6861d62
commit 0afdb8f286
1 changed files with 18 additions and 0 deletions
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18
sound/pci/ymfpci/ymfpci_main.c
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@ -1166,6 +1166,11 @@ int __devinit snd_ymfpci_pcm(struct snd_ymfpci *chip, int device, struct snd_pcm
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
snd_dma_pci_data(chip->pci), 64*1024, 256*1024);
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
snd_pcm_std_chmaps, 2, 0, NULL);
if (err < 0)
return err;
if (rpcm)
*rpcm = pcm;
return 0;
@ -1257,6 +1262,14 @@ static struct snd_pcm_ops snd_ymfpci_playback_4ch_ops = {
.pointer = snd_ymfpci_playback_pointer,
};
static const struct snd_pcm_chmap_elem surround_map[] = {
{ .channels = 1,
.map = { SNDRV_CHMAP_UNKNOWN } },
{ .channels = 2,
.map = { SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
{ }
};
int __devinit snd_ymfpci_pcm_4ch(struct snd_ymfpci *chip, int device, struct snd_pcm ** rpcm)
{
struct snd_pcm *pcm;
@ -1278,6 +1291,11 @@ int __devinit snd_ymfpci_pcm_4ch(struct snd_ymfpci *chip, int device, struct snd
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
snd_dma_pci_data(chip->pci), 64*1024, 256*1024);
err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK,
surround_map, 2, 0, NULL);
if (err < 0)
return err;
if (rpcm)
*rpcm = pcm;
return 0;