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(ALSA QSA) Try another sound strategy - still FUBAR sound -

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based it on this - http://tomjansen.be/mpg123-1.15.0/mpg123-1.15.0/src/output/qsa.c
This commit is contained in:
twinaphex 2013-07-07 01:10:05 +02:00
parent 5d1ea7124b
commit ab3a8822ce
1 changed files with 28 additions and 15 deletions
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43
blackberry-qnx/alsa_qsa.c
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@ -75,9 +75,9 @@ static void *alsa_qsa_init(const char *device, unsigned rate, unsigned latency)
params.start_mode = SND_PCM_START_DATA;
params.stop_mode = SND_PCM_STOP_STOP;
params.buf.block.frag_size = 2048;
params.buf.block.frags_min = 4;
params.buf.block.frags_max = 8;
params.buf.block.frag_size = 4096;
params.buf.block.frags_min = 8;
params.buf.block.frags_max = 16;
if ((err = snd_pcm_plugin_params(alsa->pcm, &params)) < 0)
@ -94,8 +94,8 @@ static void *alsa_qsa_init(const char *device, unsigned rate, unsigned latency)
goto error;
}
alsa->buffer_size = setup.buf.block.frag_size * setup.buf.block.frags;
RARCH_LOG("[ALSA QSA]: buffer size: %d bytes (?)\n", alsa->buffer_size);
alsa->buffer_size = setup.buf.block.frag_size * (setup.buf.block.frags_max+1);
RARCH_LOG("[ALSA QSA]: buffer size: %d bytes\n", alsa->buffer_size);
if ((err = snd_pcm_plugin_prepare(alsa->pcm, SND_PCM_CHANNEL_PLAYBACK)) < 0)
{
@ -117,25 +117,38 @@ error:
static ssize_t alsa_qsa_write(void *data, const void *buf, size_t size)
{
int written, err;
int written, status;
alsa_t *alsa = (alsa_t*)data;
snd_pcm_channel_status_t status = {0};
snd_pcm_channel_status_t cstatus = {0};
written = snd_pcm_plugin_write(alsa->pcm, buf, size);
if (written < size)
if (written != size)
{
status.channel = SND_PCM_CHANNEL_PLAYBACK;
/* Check if samples playback got stuck somewhere in hardware or in */
/* the audio device driver */
if ((errno == EAGAIN) && (written == 0))
return 0;
if ((err = snd_pcm_plugin_status(alsa->pcm, &status)) < 0)
RARCH_ERR("[ALSA QSA]: Error reading status: %s\n", snd_strerror(err));
if ((errno == EINVAL) || (errno == EIO))
{
cstatus.channel = SND_PCM_CHANNEL_PLAYBACK;
status = snd_pcm_plugin_status(alsa->pcm, &cstatus);
if (status.status == SND_PCM_STATUS_UNDERRUN)
if (snd_pcm_plugin_prepare(alsa->pcm, SND_PCM_CHANNEL_PLAYBACK) < 0)
RARCH_ERR("[ALSA QSA]: Underrun - playback channel prepare error.\n");
if (status > 0)
return 0;
if ((cstatus.status == SND_PCM_STATUS_UNDERRUN) ||
(cstatus.status == SND_PCM_STATUS_READY))
{
status = snd_pcm_plugin_prepare(alsa->pcm, SND_PCM_CHANNEL_PLAYBACK);
if (status < 0)
return 0;
}
}
}
return size;
return written;
}
static bool alsa_qsa_stop(void *data)