Re: [alsa-devel] trace PCM data from usb bus to alsa lib

At Wed, 17 Jun 2009 07:25:25 +0000 (UTC), ZeroCluo wrote:

Hi

I am trying to trace the Audio data from usb bus. in kernel: dump data in retire_capture_urb() ,found data format is like: AABB 0000 CCDD 0000 ;

but in alsa library , dump data in snd_pcm_mmap_begin(),the "0000" is cut,only "AABB CCDD",

Do you know when and where those "0000" is cut?

Are you using the native format that the hardware runs?

Takashi