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alsa: re-enable blocking mode

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Revert e4f5d6bd "re-enable-nonblocking, but sleep if busy".
Non-blocking mode with manual sleeping doesn't help at all (by the
way, the patch should have used snd_pcm_wait() instead of
my_usleep()).  ALSA knows much more about the hardware quirks, so we
just let it do the job.
This commit is contained in:
Max Kellermann 2008-10-11 12:47:20 +02:00
parent 215d8aa8f6
commit bcc443a8aa
1 changed files with 2 additions and 15 deletions
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17
src/audioOutputs/audioOutput_alsa.c
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@ -46,7 +46,6 @@ typedef struct _AlsaData {
alsa_writei_t *writei;
unsigned int buffer_time;
unsigned int period_time;
unsigned int period_sleep;
int sampleSize;
int useMmap;
} AlsaData;
@ -157,17 +156,12 @@ static int alsa_openDevice(void *data, struct audio_format *audioFormat)
ad->device, audioFormat->bits);
err = snd_pcm_open(&ad->pcmHandle, ad->device,
SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
SND_PCM_STREAM_PLAYBACK, 0);
if (err < 0) {
ad->pcmHandle = NULL;
goto error;
}
cmd = "snd_pcm_nonblock";
err = snd_pcm_nonblock(ad->pcmHandle, 0);
if (err < 0)
goto error;
period_time_ro = period_time = ad->period_time;
configure_hw:
/* configure HW params */
@ -249,8 +243,6 @@ configure_hw:
if (retry != MPD_ALSA_RETRY_NR)
DEBUG("ALSA period_time set to %d\n", period_time);
ad->period_sleep = period_time >> 1;
cmd = "snd_pcm_hw_params_get_buffer_size";
err = snd_pcm_hw_params_get_buffer_size(hwparams, &alsa_buffer_size);
if (err < 0)
@ -379,12 +371,7 @@ static int alsa_playAudio(void *data, const char *playChunk, size_t size)
while (size > 0) {
ret = ad->writei(ad->pcmHandle, playChunk, size);
if (ret == -EAGAIN) {
DEBUG("ALSA busy, sleeping %d\n", ad->period_sleep);
my_usleep(ad->period_sleep);
continue;
}
if (ret == -EINTR)
if (ret == -EAGAIN || ret == -EINTR)
continue;
if (ret < 0) {