I have taken another look at my project and now it's behaving differently! It still won't go down to a period size of 128.
I have downloaded the example sine wave generator. It works with the default settings, which give a period size of 4410. If I change the period time using the command line, it will successfully go down to 441/10000us. Any further and I get this error:
ALSA lib pcm.c:824:(snd_pcm_sw_params) snd_pcm_sw_params: params->avail_min problem for start_threshold
Unable to set sw params for playback: Invalid argument
Setting of swparams failed: Invalid argument
On 01/04/2004, at 4:52 PM, Jaroslav Kysela wrote:
On Thu, 1 Apr 2004, Tim Hollingsworth wrote:
You can read/write any size.
well I can't write at 128. the question is, do I need to buffer the periods myself and sequence them into larger periods or will alsa do this for me?
The you have wrong sw_params settings. Check xfer_align.
Jaroslav
----- Jaroslav Kysela <[EMAIL PROTECTED]> Linux Kernel Sound Maintainer ALSA Project, SuSE Labs
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