int sa_stream_drain(sa_stream_t *s)
{
int status = SA_SUCCESS;
char buf[32];
if (!s)
return os2_error(SA_ERROR_NO_INIT, "sa_stream_drain", "s is null", 0);
/* keep os2_mixer_event() from reacting to buffer under-runs */
s->usedMin = 0;
/* perform the smallest possible write to force any
* partially-filled buffer to be written to the device */
memset(buf, 0, sizeof(buf));
s->bufMin = 0;
sa_stream_write(s, buf, s->nchannels * SAOS2_SAMPLE_SIZE);
/* DART won't start playing until 2 buffers have been written,
* so write a dummy 2nd buffer if writePos is still zero */
if (!s->writePos)
s->writePos += __atomic_xchg(&s->writeNew, 0);
if (!s->writePos)
sa_stream_write(s, buf, s->nchannels * SAOS2_SAMPLE_SIZE);
/* wait for all buffers to become free */
if (!status)
status = os2_get_free_count(s, s->bufCnt);
s->playing = FALSE;
/* stop the device so it doesn't misbehave due to an under-run */
os2_stop_device(s->hwDeviceID);
return status;
}
int
sa_stream_drain(sa_stream_t *s)
{
if (s == NULL || s->output_unit == NULL) {
return SA_ERROR_NO_INIT;
}
if (snd_pcm_state(s->output_unit) == SND_PCM_STATE_PREPARED) {
size_t min_samples = 0;
size_t min_bytes = 0;
void *buf;
if (sa_stream_get_min_write(s, &min_samples) < 0)
return SA_ERROR_SYSTEM;
min_bytes = snd_pcm_frames_to_bytes(s->output_unit, min_samples);
buf = malloc(min_bytes);
if (!buf)
return SA_ERROR_SYSTEM;
memset(buf, 0, min_bytes);
sa_stream_write(s, buf, min_bytes);
free(buf);
}
if (snd_pcm_state(s->output_unit) != SND_PCM_STATE_RUNNING) {
return SA_ERROR_INVALID;
}
snd_pcm_drain(s->output_unit);
return SA_SUCCESS;
}
nsresult nsNativeAudioStream::Write(const AudioDataValue* aBuf, uint32_t aFrames)
{
NS_ASSERTION(!mPaused, "Don't write audio when paused, you'll block");
if (mInError)
return NS_ERROR_FAILURE;
uint32_t samples = aFrames * mChannels;
nsAutoArrayPtr<short> s_data(new short[samples]);
float scaled_volume = float(GetVolumeScale() * mVolume);
ConvertAudioSamplesWithScale(aBuf, s_data.get(), samples, scaled_volume);
if (sa_stream_write(static_cast<sa_stream_t*>(mAudioHandle),
s_data.get(),
samples * sizeof(short)) != SA_SUCCESS)
{
PR_LOG(gAudioStreamLog, PR_LOG_ERROR, ("nsNativeAudioStream: sa_stream_write error"));
mInError = true;
return NS_ERROR_FAILURE;
}
return NS_OK;
}
