On Wed, 11 Jul 2007 10:47:56 +0200 Takashi Iwai tiwai@suse.de wrote:
At Tue, 10 Jul 2007 11:08:01 -0700, Steve Longerbeam wrote:
Hi,
The driver for the sound engine I'm working on requires NONINTERLEAVED. Will ALSA core give my driver a full period of left-only samples, followed by a full period of right-only samples? Or are left/right samples split within a single period (ie. first half of period is left samples, second half is right samples)?
The former case. The standard non-interleaved buffer consists of (the same buffer-size of) full-length of mono-streams.
Takashi
Doesn't this depend upon the driver implementation ? IIRC, I tried to request NON-INTERLEAVED on the PXA270 AC97 driver and it told me that wasn't a permitted operation (one of the reasons that I needed to use mmap access in SALSA-Lib).