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- added snd_pcm_mmap_begin_avail function; it is optimized for use after

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snd_pcm_avail_update() call
- fixed broken hw_ptr management inside snd_pcm_plugin code
This commit is contained in:
Jaroslav Kysela 2001-12-09 18:41:23 +00:00
parent b63e44aab0
commit b7b11c3558
4 changed files with 187 additions and 69 deletions
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85
test/pcm.c
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@ -411,29 +411,78 @@ static int direct_loop(snd_pcm_t *handle,
{
double phase = 0;
const snd_pcm_channel_area_t *my_areas;
snd_pcm_uframes_t offset, frames;
snd_pcm_uframes_t offset, frames, size;
snd_pcm_sframes_t avail;
snd_pcm_state_t state;
int err, first = 1;
while (1) {
frames = period_size;
err = snd_pcm_mmap_begin(handle, &my_areas, &offset, &frames);
if (err < 0) {
printf("MMAP begin error: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
generate_sine(my_areas, offset, frames, &phase);
err = snd_pcm_mmap_commit(handle, offset, frames);
if (err < 0) {
printf("MMAP commit error: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
if (frames == 0 && first) { /* trigger playback */
first = 0;
err = snd_pcm_start(handle);
state = snd_pcm_state(handle);
if (state == SND_PCM_STATE_XRUN) {
err = xrun_recovery(handle, -EPIPE);
if (err < 0) {
printf("Start error: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
printf("XRUN recovery failed: %s\n", snd_strerror(err));
return err;
}
first = 1;
} else if (state == SND_PCM_STATE_SUSPENDED) {
err = xrun_recovery(handle, -ESTRPIPE);
if (err < 0) {
printf("SUSPEND recovery failed: %s\n", snd_strerror(err));
return err;
}
}
avail = snd_pcm_avail_update(handle);
if (avail < 0) {
err = xrun_recovery(handle, avail);
if (err < 0) {
printf("avail update failed: %s\n", snd_strerror(err));
return err;
}
first = 1;
continue;
}
if (avail < period_size) {
if (first) {
first = 0;
err = snd_pcm_start(handle);
if (err < 0) {
printf("Start error: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
} else {
err = snd_pcm_wait(handle, -1);
if (err < 0) {
if ((err = xrun_recovery(handle, err)) < 0) {
printf("snd_pcm_wait error: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
first = 1;
}
}
continue;
}
size = period_size;
while (size > 0) {
frames = size;
err = snd_pcm_mmap_begin_avail(handle, &my_areas, &offset, &frames, avail);
if (err < 0) {
if ((err = xrun_recovery(handle, err)) < 0) {
printf("MMAP begin avail error: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
first = 1;
}
generate_sine(my_areas, offset, frames, &phase);
err = snd_pcm_mmap_commit(handle, offset, frames);
if (err < 0) {
if ((err = xrun_recovery(handle, err)) < 0) {
printf("MMAP commit error: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
first = 1;
}
size -= frames;
}
}
}