On Fri, 2017-09-08 at 12:52 +0200, Clemens Ladisch wrote:
Jörg Krause wrote:
Tested with a Wolfson WM8524 DAC on a i.MX6UL board running Linux version 4.13.0-next-20170907.
- case SND_PCM_FORMAT_S24_LE:
/* 24bit samples, fallthrough */S24_LE cannot be handled with the same algorithm as S32_LE.
That would have been too easy.
I suspect that the hardware does not actually use S24_LE, and that the driver uses the wrong label for this format.
Maybe you are right about that. I will have a look.
Please describe exactly how the 24-bit sample is aligned into the 32-bit memory cell.
According to this old post [1] it is aligned as followed:
00ffff3f 00ffff3f 00ebd96e 00ebd96e 00ffff7f 00ffff7f Meaning the left-most byte is zeroed, right?
[1] http://mailman.alsa-project.org/pipermail/alsa-devel/2008-July/0090 99.html
Best regards, Jörg Krause