Commit 2dc6fbf0 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: pcm - Use UNKNOWN chmap for mono streams 



In general, mono streams have no dedicated speaker assignment, thus
they should be rather marked as UNKNOWN position.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 498dab3a

sound/core/pcm_lib.c

+2 −2
Original line number Diff line number Diff line
@@ -2311,7 +2311,7 @@ EXPORT_SYMBOL(snd_pcm_lib_readv); 
/* default channel maps for multi-channel playbacks, up to 8 channels */

const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = {

	{ .channels = 1,

	  .map = { SNDRV_CHMAP_FC } },

	  .map = { SNDRV_CHMAP_UNKNOWN } },

	{ .channels = 2,

	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },

	{ .channels = 4,
@@ -2333,7 +2333,7 @@ EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); 
/* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */

const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = {

	{ .channels = 1,

	  .map = { SNDRV_CHMAP_FC } },

	  .map = { SNDRV_CHMAP_UNKNOWN } },

	{ .channels = 2,

	  .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },

	{ .channels = 4,