static void alsa_stop_capture(ALCdevice *Device)
{
alsa_data *data = (alsa_data*)Device->ExtraData;
ALCuint avail;
int err;
/* OpenAL requires access to unread audio after stopping, but ALSA's
* snd_pcm_drain is unreliable and snd_pcm_drop drops it. Capture what's
* available now so it'll be available later after the drop. */
avail = alsa_available_samples(Device);
if(!data->ring && avail > 0)
{
/* The ring buffer implicitly captures when checking availability.
* Direct access needs to explicitly capture it into temp storage. */
ALsizei size;
void *ptr;
size = snd_pcm_frames_to_bytes(data->pcmHandle, avail);
ptr = realloc(data->buffer, size);
if(ptr)
{
data->buffer = ptr;
alsa_capture_samples(Device, data->buffer, avail);
data->size = size;
}
}
err = snd_pcm_drop(data->pcmHandle);
if(err < 0)
ERR("drop failed: %s\n", snd_strerror(err));
data->doCapture = AL_FALSE;
}
static void alsa_capture_samples(ALCdevice *Device, ALCvoid *Buffer, ALCuint Samples)
{
alsa_data *data = (alsa_data*)Device->ExtraData;
if(Samples <= alsa_available_samples(Device))
ReadRingBuffer(data->ring, Buffer, Samples);
else
alcSetError(Device, ALC_INVALID_VALUE);
}