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ALSA: Follow channel position definitions to alsa-lib mixer 

There is already a set of channel position definitions in alsa-lib
mixer.h, and it'd be more practical to keep the same order for the
PCM channel map, too.  The value is shifted with 1 to keep zero for
UNKNOWN.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2012-08-21 14:47:18 +02:00
parent 6e67683d71
commit 080108c474
2 changed files with 18 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
Documentation/sound/alsa/Channel-Mapping-API.txt
View File

@ -76,20 +76,22 @@ here is a cut:
/* channel positions */
enum {
/* this follows the alsa-lib mixer channel value + 1 */
SNDRV_CHMAP_UNKNOWN = 0,
SNDRV_CHMAP_FL, /* front left */
SNDRV_CHMAP_FC, /* front center */
SNDRV_CHMAP_FR, /* front right */
SNDRV_CHMAP_FLC, /* front left center */
SNDRV_CHMAP_FRC, /* front right center */
SNDRV_CHMAP_RL, /* rear left */
SNDRV_CHMAP_RC, /* rear center */
SNDRV_CHMAP_RR, /* rear right */
SNDRV_CHMAP_RLC, /* rear left center */
SNDRV_CHMAP_RRC, /* rear right center */
SNDRV_CHMAP_FC, /* front center */
SNDRV_CHMAP_LFE, /* LFE */
SNDRV_CHMAP_SL, /* side left */
SNDRV_CHMAP_SR, /* side right */
SNDRV_CHMAP_LFE, /* LFE */
SNDRV_CHMAP_RC, /* rear center */
/* new definitions */
SNDRV_CHMAP_FLC, /* front left center */
SNDRV_CHMAP_FRC, /* front right center */
SNDRV_CHMAP_RLC, /* rear left center */
SNDRV_CHMAP_RRC, /* rear right center */
SNDRV_CHMAP_FLW, /* front left wide */
SNDRV_CHMAP_FRW, /* front right wide */
SNDRV_CHMAP_FLH, /* front left high */

16
include/sound/asound.h
View File

@ -474,20 +474,22 @@ enum {
/* channel positions */
enum {
/* this follows the alsa-lib mixer channel value + 1 */
SNDRV_CHMAP_UNKNOWN = 0,
SNDRV_CHMAP_FL, /* front left */
SNDRV_CHMAP_FC, /* front center */
SNDRV_CHMAP_FR, /* front right */
SNDRV_CHMAP_FLC, /* front left center */
SNDRV_CHMAP_FRC, /* front right center */
SNDRV_CHMAP_RL, /* rear left */
SNDRV_CHMAP_RC, /* rear center */
SNDRV_CHMAP_RR, /* rear right */
SNDRV_CHMAP_RLC, /* rear left center */
SNDRV_CHMAP_RRC, /* rear right center */
SNDRV_CHMAP_FC, /* front center */
SNDRV_CHMAP_LFE, /* LFE */
SNDRV_CHMAP_SL, /* side left */
SNDRV_CHMAP_SR, /* side right */
SNDRV_CHMAP_LFE, /* LFE */
SNDRV_CHMAP_RC, /* rear center */
/* new definitions */
SNDRV_CHMAP_FLC, /* front left center */
SNDRV_CHMAP_FRC, /* front right center */
SNDRV_CHMAP_RLC, /* rear left center */
SNDRV_CHMAP_RRC, /* rear right center */
SNDRV_CHMAP_FLW, /* front left wide */
SNDRV_CHMAP_FRW, /* front right wide */
SNDRV_CHMAP_FLH, /* front left high */