[alsa-devel] [Linux-kernel] [PATCH v5 2/7] ASoC: tegra: Allow 24bit and 32bit samples

[Dmitry Osipenko]

28.01.2020 18:26, Mark Brown пишет:
> On Tue, Jan 28, 2020 at 01:19:17PM +0000, Jon Hunter wrote:
>> On 28/01/2020 08:59, Ben Dooks wrote:
>>> On 27/01/2020 19:23, Dmitry Osipenko wrote:
>>>> 27.01.2020 22:20, Dmitry Osipenko пишет:
>>>> I also suspect that s32 may need some extra patches and thus could be
>>>> worthwhile to stop advertising it as well.
> 
>>> As far as I am aware that works and we can hit the audio rates for it.
> 
>> I ran a test on Tegra124 Jetson-TK1 and 24-bit playback seems to work as
>> Ben has indicated. So I don't think it is broken.
> 
>> Can you try Ben's testcase on Tegra30 (ie. generate a tone using sox and
>> use aplay to play)?
> 
> Another test application that's quite useful for this sort of stuff is
> speaker-test, it generates audio data directly in arbatrary formats and
> it's part of alsa-utils so if you've got aplay and friends you may
> already have it already installed.

I tried speaker-test and it doesn't support S24_LE:

# speaker-test -h

speaker-test 1.1.9

Usage: speaker-test [OPTION]...
-h,--help       help
-D,--device     playback device
-r,--rate       stream rate in Hz
-c,--channels   count of channels in stream
-f,--frequency  sine wave frequency in Hz
-F,--format     sample format
-b,--buffer     ring buffer size in us
-p,--period     period size in us
-P,--nperiods   number of periods
-t,--test       pink=use pink noise, sine=use sine wave, wav=WAV file
-l,--nloops     specify number of loops to test, 0 = infinite
-s,--speaker    single speaker test. Values 1=Left, 2=right, etc
-w,--wavfile    Use the given WAV file as a test sound
-W,--wavdir     Specify the directory containing WAV files
-m,--chmap      Specify the channel map to override
-X,--force-frequency    force frequencies outside the 30-8000hz range
-S,--scale      Scale of generated test tones in percent (default=80)

Recognized sample formats are: S8 S16_LE S16_BE FLOAT_LE S24_3LE S24_3BE
S32_LE S32_BE