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PCM: Implement snd_pcm_query_chmaps_from_hw()

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This is a function similar like snd_pcm_query_chmaps() but performs
the query without a PCM handle.  The card, device and substream
numbers are passed as well as stream direction.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2012-09-07 14:15:04 +02:00
parent 9c1a0ce72d
commit 01dc0e6825
2 changed files with 108 additions and 70 deletions
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3
include/pcm.h
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@ -526,6 +526,9 @@ typedef struct snd_pcm_chmap_query {
snd_pcm_chmap_query_t **snd_pcm_query_chmaps(snd_pcm_t *pcm);
snd_pcm_chmap_query_t **snd_pcm_query_chmaps_from_hw(int card, int dev,
int subdev,
snd_pcm_stream_t stream);
void snd_pcm_free_chmaps(snd_pcm_chmap_query_t **maps);
snd_pcm_chmap_t *snd_pcm_get_chmap(snd_pcm_t *pcm);
int snd_pcm_set_chmap(snd_pcm_t *pcm, const snd_pcm_chmap_t *map);