31 Aug
2012
31 Aug
'12
4:06 a.m.
2012-8-31 上午9:08 於 "Vinod Koul" vinod.koul@linux.intel.com 寫道：
In many modern SoCs the audio DSP can buffer the PCM ring buffer data,
typically
in SRAMs or any other memory available. Today we have no means to represent this buffering and ALSA in some cases
when
device still has to render this buffer but app_ptr is equal to hw_ptr alsa wrongly detects an overrun
This patch tries to add a new field "device_buffer" to represent
buffering done in
DSPs. This value is also used for the xrun calculations in ALSA
Signed-off-by: Vinod Koul vinod.koul@linux.intel.com
are these buffer similar to hda 's FIFO ?
can the alsa application use snd_pcm_rewind to rewind the app_ptr ?