Hi Takashi,
Can't you reopen (as feedback)?
Oh, perhaps I could; I haven't used Mantis before and didn't look that
carefully :(
Also, I'm still encountering bug 2601 (a separate assert failure that
happens if period_size == 0) even with the patch to pcm_ioplug.c. I think
that PERIOD_TIME and PERIODS need to be constrained; I added a couple of
comments to the bug.
Hm, does it happen with the latest HG tree, too?
Yes (at least with the latest hg tree that was accessible via hg-mirror a
few minutes ago). I put a patch on the bug that does make things work.
Test case attached (adapted from flite mostly)#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <unistd.h>
#include <alsa/asoundlib.h>
static int getAvailableFrames(snd_pcm_t *pcm, int *xrunOccurred)
{
snd_pcm_sframes_t framesAvail = snd_pcm_avail_update( pcm );
*xrunOccurred = 0;
if( -EPIPE == framesAvail )
{
*xrunOccurred = 1;
framesAvail = 0;
}
return framesAvail;
}
static char *buf;
snd_pcm_t *audio_open_alsa(const char *pcm_dev_name, int sps, int channels)
{
unsigned int real_rate;
int err;
unsigned long bufSz = 1411;
snd_pcm_t *pcm_handle;
snd_pcm_stream_t stream = SND_PCM_STREAM_PLAYBACK;
snd_pcm_hw_params_t *hwparams;
snd_pcm_format_t format;
snd_pcm_access_t access = SND_PCM_ACCESS_RW_INTERLEAVED;
/* Allocate the snd_pcm_hw_params_t structure on the stack. */
snd_pcm_hw_params_alloca(&hwparams);
/* Open pcm device */
err = snd_pcm_open(&pcm_handle, pcm_dev_name, stream, 0);
if (err < 0)
{
return NULL;
}
/* Init hwparams with full configuration space */
err = snd_pcm_hw_params_any(pcm_handle, hwparams);
if (err < 0)
{
snd_pcm_close(pcm_handle);
return NULL;
}
/* Set access mode */
err = snd_pcm_hw_params_set_access(pcm_handle, hwparams, access);
if (err < 0)
{
snd_pcm_close(pcm_handle);
return NULL;
}
format = SND_PCM_FORMAT_S16_LE;
/* Set samble format */
err = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format);
if (err <0)
{
snd_pcm_close(pcm_handle);
return NULL;
}
/* Set sample rate near the disired rate */
real_rate = sps;
err = snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, &real_rate, 0);
if (err < 0)
{
snd_pcm_close(pcm_handle);
return NULL;
}
/* Set number of channels */
assert(channels >0);
err = snd_pcm_hw_params_set_channels(pcm_handle, hwparams, channels);
if (err < 0)
{
snd_pcm_close(pcm_handle);
return NULL;
}
snd_pcm_hw_params_set_buffer_size_near(pcm_handle, hwparams, &bufSz);
/* Commit hardware parameters */
err = snd_pcm_hw_params(pcm_handle, hwparams);
if (err < 0)
{
snd_pcm_close(pcm_handle);
return NULL;
}
/* Make sure the device is ready to accept data */
assert(snd_pcm_state(pcm_handle) == SND_PCM_STATE_PREPARED);
return pcm_handle;
}
main(int argc, const char *argv[])
{
snd_pcm_t *pcm;
buf = (char *)malloc(1000000);
pcm = audio_open_alsa("default", 22050, 1);
int xrun;
int result;
pthread_t th;
if (!pcm)
{
fprintf(stderr, "Couldn't open pcm\n");
exit(1);
}
unsigned long avail = snd_pcm_avail_update(pcm);
if (avail > 100000) avail = 100000;
result = snd_pcm_writei(pcm, buf, avail);
}
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