On Sat, Jul 12, 2003 at 02:08:34PM +0200, Carlo Wood wrote:
> Hence, the problem is now reduced to the question:
> Why is snd_pcm_update_hw_ptr_interrupt not called anymore
> after we did run into an xrun?
I added a few more printk's and already I can guess
what is the reason that the 'blackbox' (the rest)
stops calling snd_pcm_update_hw_ptr_interrupt:
Jul 12 15:40:38 ansset kernel: Entering snd_pcm_update_hw_ptr_interrupt
Jul 12 15:40:38 ansset kernel: snd_pcm_update_hw_ptr_interrupt: status->hw_ptr set to
2048
Jul 12 15:40:38 ansset kernel: snd_pcm_capture_avail: boundary = 1073741824,
status->hw_ptr = 2048, control->appl_ptr = 1024
Jul 12 15:40:38 ansset kernel: Leaving snd_pcm_update_hw_ptr_interrupt with EPIPE
Lets have a closer look at snd_pcm_update_hw_ptr_interrupt:
runtime->status->hw_ptr = new_hw_ptr;
printk("snd_pcm_update_hw_ptr_interrupt: status->hw_ptr set to %li\n",
runtime->status->hw_ptr);
runtime->hw_ptr_interrupt = new_hw_ptr - new_hw_ptr % runtime->period_size;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
avail = snd_pcm_playback_avail(runtime);
else
avail = snd_pcm_capture_avail(runtime);
if (avail > runtime->avail_max)
runtime->avail_max = avail;
if (avail >= runtime->stop_threshold) {
snd_pcm_stop(substream,
runtime->status->state == SNDRV_PCM_STATE_DRAINING ?
SNDRV_PCM_STATE_SETUP : SNDRV_PCM_STATE_XRUN);
printk("Leaving snd_pcm_update_hw_ptr_interrupt with EPIPE\n");
return -EPIPE;
}
if (avail >= runtime->control->avail_min)
wake_up(&runtime->sleep);
printk("Leaving snd_pcm_update_hw_ptr_interrupt\n");
return 0;
}
I thought it was said that an xrun should simply be ignored?
What is the correct way to recover from this, to continue
recording in this case, after the xrun?
--
Carlo Wood <[EMAIL PROTECTED]>
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