static snd_pcm_sframes_t snd_pcm_ioplug_readi(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size)
{
if (pcm->mmap_rw)
return snd_pcm_mmap_readi(pcm, buffer, size);
else {
snd_pcm_channel_area_t areas[pcm->channels];
snd_pcm_areas_from_buf(pcm, areas, buffer);
return snd_pcm_read_areas(pcm, areas, 0, size,
ioplug_priv_transfer_areas);
}
}
int FCDProThread::work(int n_items)
{
int l;
SampleVector::iterator it;
void *out;
it = m_convertBuffer.begin();
out = (void *)&it[0];
l = snd_pcm_mmap_readi(fcd_handle, out, (snd_pcm_uframes_t)n_items);
if (l > 0)
m_sampleFifo->write(it, it + l);
if (l == -EPIPE) {
qDebug("FCD: Overrun detected");
return 0;
}
return l;
}
ssize_t AudioStreamInALSA::read(void *buffer, ssize_t bytes)
{
android::AutoMutex lock(mLock);
if (!mPowerLock) {
acquire_wake_lock (PARTIAL_WAKE_LOCK, "AudioInLock");
mPowerLock = true;
}
acoustic_device_t *aDev = acoustics();
// If there is an acoustics module read method, then it overrides this
// implementation (unlike AudioStreamOutALSA write).
if (aDev && aDev->read)
return aDev->read(aDev, buffer, bytes);
snd_pcm_sframes_t n, frames = snd_pcm_bytes_to_frames(mHandle->handle, bytes);
status_t err;
do {
if (mHandle->mmap)
n = snd_pcm_mmap_readi(mHandle->handle, buffer, frames);
else
n = snd_pcm_readi(mHandle->handle, buffer, frames);
if (n < frames) {
if (mHandle->handle) {
if (n < 0) {
n = snd_pcm_recover(mHandle->handle, n, 0);
if (aDev && aDev->recover) aDev->recover(aDev, n);
} else
n = snd_pcm_prepare(mHandle->handle);
}
return static_cast<ssize_t>(n);
}
} while (n == -EAGAIN);
return static_cast<ssize_t>(snd_pcm_frames_to_bytes(mHandle->handle, n));
}