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use-case.h: add Channels/ChannelPos values to the documentation

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We have use cases, where the channel split is required. We
can use alsa-lib plugins for this job, but some sound servers
or applications may want to do the split themselves.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2022-05-24 14:24:10 +02:00
parent 7474518a96
commit 0ba999591b
1 changed files with 12 additions and 0 deletions
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12
include/use-case.h
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@ -315,6 +315,12 @@ int snd_use_case_get_list(snd_use_case_mgr_t *uc_mgr,
* - playback device sample rate
* - PlaybackChannels
* - playback device channel count
* - PlaybackChannel#
* - describe index of the logical channel in the PCM stream
* - e.g. "PlaybackChannel0 2" - logical channel 0 is third channel in the PCM stream
* - PlaybackChannelPos#
* - describe sound position of the logical channel (ALSA chmap names)
* - e.g. "PlaybackChannel0 FR" - logical channel 0 is at front left
* - PlaybackCTL
* - playback control device name
* - PlaybackVolume
@ -329,6 +335,12 @@ int snd_use_case_get_list(snd_use_case_mgr_t *uc_mgr,
* - capture device sample rate
* - CaptureChannels
* - capture device channel count
* - CaptureChannel#
* - describe index of the logical channel in the PCM stream
* - e.g. "CaptureChannel0 2" - logical channel 0 is third channel in the PCM stream
* - CaptureChannelPos#
* - describe sound position of the logical channel (ALSA chmap names)
* - e.g. "CaptureChannel0 FR" - logical channel 0 is at front left
* - CaptureCTL
* - capture control device name
* - CaptureVolume