ALSA: emu10k1x: Define channel maps
Provide channel maps for individual stereo streams of emu10k1x.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/emu10k1/emu10k1x.c b/sound/pci/emu10k1/emu10k1x.c
index 5c8978b..556fd6f 100644
--- a/sound/pci/emu10k1/emu10k1x.c
+++ b/sound/pci/emu10k1/emu10k1x.c
@@ -830,9 +830,22 @@
return IRQ_HANDLED;
}
+static const struct snd_pcm_chmap_elem surround_map[] = {
+ { .channels = 2,
+ .map = { SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
+ { }
+};
+
+static const struct snd_pcm_chmap_elem clfe_map[] = {
+ { .channels = 2,
+ .map = { SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } },
+ { }
+};
+
static int __devinit snd_emu10k1x_pcm(struct emu10k1x *emu, int device, struct snd_pcm **rpcm)
{
struct snd_pcm *pcm;
+ const struct snd_pcm_chmap_elem *map = NULL;
int err;
int capture = 0;
@@ -861,12 +874,15 @@
switch(device) {
case 0:
strcpy(pcm->name, "EMU10K1X Front");
+ map = snd_pcm_std_chmaps;
break;
case 1:
strcpy(pcm->name, "EMU10K1X Rear");
+ map = surround_map;
break;
case 2:
strcpy(pcm->name, "EMU10K1X Center/LFE");
+ map = clfe_map;
break;
}
emu->pcm = pcm;
@@ -875,6 +891,11 @@
snd_dma_pci_data(emu->pci),
32*1024, 32*1024);
+ err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK, map, 2,
+ 1 << 2, NULL);
+ if (err < 0)
+ return err;
+
if (rpcm)
*rpcm = pcm;