Hello,
Can anyone tell me how does pcm_lib.c cope with buffer wrap around ?
I'm missing something like:
delta = pointer_current - pointer_prev;
if (delta < 0)
delta += period_size;
Well, indeed i'm getting some warnings then and when, after i enabled
the ALSA debug option:
ALSA sound/core/pcm_lib.c:216: Unexpected hw_pointer value (stream = 0,
delta: -586, max jitter = 8192): wrong interrupt acknowledge?
Delta has a negative value, thus the if statement :
if ((snd_pcm_uframes_t)delta < runtime->buffer_size / 2) {
snd_printd("Unexpected hw_pointer value (stream = %i, d
return 0;
}
... is always true. Well, as the code looks like, the situation when the
period pointer wraps around back to cero isn't handled correctly. Or is
that handled by other means ? Maybe i just oversaw something. Can anyone
give me more insight over this ? Thanks...
Best Regards
Manuel Jander.
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