src: utils: Add ccaps to query compress device capabilities - #39
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Add a small utility to dump the capabilities of a compress device.
It uses the same device selection style as cplay (-c card, -d device)
and prints the protocol version, direction, fragment size/count limits
and the list of supported codecs.
For each codec the SNDRV_COMPRESS_GET_CODEC_CAPS descriptors are
printed as well. Drivers not implementing the codec caps ioctl are
reported instead of treated as an error.
The direction is derived from the open flags by the core, so by default
the device is opened for playback first and for capture as fallback.
It can be forced with -D p|c.
Example output:
$ ccaps -c0 -d50
Compress device hw:0,50
protocol version: 0.4.1
direction: playback
fragment size: 38400 - 131072 bytes
fragments: 3 - 64
codecs: 4
[0] AAC (0x6)
[1] MP3 (0x2)
[2] VORBIS (0x9)
[3] PCM (0x1)
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Member
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I would probably prefer a longer name than 'ccaps' like 'sndccaps' or `sndcompcaps'. The play/record words identifies the relation to the audio so an additional identification is not required IMHO. |
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Add a small utility to dump the capabilities of a compress device. It uses the same device selection style as cplay (-c card, -d device) and prints the protocol version, direction, fragment size/count limits and the list of supported codecs.
For each codec the SNDRV_COMPRESS_GET_CODEC_CAPS descriptors are printed as well. Drivers not implementing the codec caps ioctl are reported instead of treated as an error.
The direction is derived from the open flags by the core, so by default the device is opened for playback first and for capture as fallback. It can be forced with -D p|c.
Example output:
$ ccaps -c0 -d50
Compress device hw:0,50
protocol version: 0.4.1
direction: playback
fragment size: 38400 - 131072 bytes
fragments: 3 - 64
codecs: 4
[0] AAC (0x6)
[1] MP3 (0x2)
[2] VORBIS (0x9)
[3] PCM (0x1)