diff options
Diffstat (limited to 'Documentation/sound/alsa')
| -rw-r--r-- | Documentation/sound/alsa/Channel-Mapping-API.txt | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/Documentation/sound/alsa/Channel-Mapping-API.txt b/Documentation/sound/alsa/Channel-Mapping-API.txt index 4bbf12d5553f..3c43d1a4ca0e 100644 --- a/Documentation/sound/alsa/Channel-Mapping-API.txt +++ b/Documentation/sound/alsa/Channel-Mapping-API.txt @@ -76,8 +76,10 @@ here is a cut: /* channel positions */ enum { - /* this follows the alsa-lib mixer channel value + 1 */ SNDRV_CHMAP_UNKNOWN = 0, + SNDRV_CHMAP_NA, /* N/A, silent */ + SNDRV_CHMAP_MONO, /* mono stream */ + /* this follows the alsa-lib mixer channel value + 3 */ SNDRV_CHMAP_FL, /* front left */ SNDRV_CHMAP_FR, /* front right */ SNDRV_CHMAP_RL, /* rear left */ @@ -98,8 +100,13 @@ enum { SNDRV_CHMAP_FCH, /* front center high */ SNDRV_CHMAP_FRH, /* front right high */ SNDRV_CHMAP_TC, /* top center */ - SNDRV_CHMAP_NA, /* N/A, silent */ - SNDRV_CHMAP_LAST = SNDRV_CHMAP_NA, + SNDRV_CHMAP_TFL, /* top front left */ + SNDRV_CHMAP_TFR, /* top front right */ + SNDRV_CHMAP_TFC, /* top front center */ + SNDRV_CHMAP_TRL, /* top rear left */ + SNDRV_CHMAP_TRR, /* top rear right */ + SNDRV_CHMAP_TRC, /* top rear center */ + SNDRV_CHMAP_LAST = SNDRV_CHMAP_TRC, }; When a PCM stream can provide more than one channel map, you can |
