static void CALLBACK DSOUND_capture_timer(UINT timerID, UINT msg, DWORD_PTR user,
DWORD_PTR dw1, DWORD_PTR dw2)
{
DirectSoundCaptureDevice *device = (DirectSoundCaptureDevice*)user;
UINT32 packet_frames, packet_bytes, avail_bytes, skip_bytes = 0;
DWORD flags;
BYTE *buf;
HRESULT hr;
if(!device->ref)
return;
EnterCriticalSection(&device->lock);
if(!device->capture_buffer || device->state == STATE_STOPPED){
LeaveCriticalSection(&device->lock);
return;
}
if(device->state == STATE_STOPPING){
device->state = STATE_STOPPED;
LeaveCriticalSection(&device->lock);
return;
}
if(device->state == STATE_STARTING)
device->state = STATE_CAPTURING;
hr = IAudioCaptureClient_GetBuffer(device->capture, &buf, &packet_frames,
&flags, NULL, NULL);
if(FAILED(hr)){
LeaveCriticalSection(&device->lock);
WARN("GetBuffer failed: %08x\n", hr);
return;
}
packet_bytes = packet_frames * device->pwfx->nBlockAlign;
if(packet_bytes > device->buflen){
TRACE("audio glitch: dsound buffer too small for data\n");
skip_bytes = packet_bytes - device->buflen;
packet_bytes = device->buflen;
}
avail_bytes = device->buflen - device->write_pos_bytes;
if(avail_bytes > packet_bytes)
avail_bytes = packet_bytes;
memcpy(device->buffer + device->write_pos_bytes, buf + skip_bytes, avail_bytes);
capture_CheckNotify(device->capture_buffer, device->write_pos_bytes, avail_bytes);
packet_bytes -= avail_bytes;
if(packet_bytes > 0){
if(device->capture_buffer->flags & DSCBSTART_LOOPING){
memcpy(device->buffer, buf + skip_bytes + avail_bytes, packet_bytes);
capture_CheckNotify(device->capture_buffer, 0, packet_bytes);
}else{
device->state = STATE_STOPPED;
capture_CheckNotify(device->capture_buffer, 0, 0);
}
}
device->write_pos_bytes += avail_bytes + packet_bytes;
device->write_pos_bytes %= device->buflen;
hr = IAudioCaptureClient_ReleaseBuffer(device->capture, packet_frames);
if(FAILED(hr)){
LeaveCriticalSection(&device->lock);
WARN("ReleaseBuffer failed: %08x\n", hr);
return;
}
LeaveCriticalSection(&device->lock);
}
static HRESULT DSOUND_capture_data(DirectSoundCaptureDevice *device)
{
HRESULT hr;
UINT32 packet_frames, packet_bytes, avail_bytes, skip_bytes = 0;
DWORD flags;
BYTE *buf;
if(!device->capture_buffer || device->state == STATE_STOPPED)
return S_FALSE;
if(device->state == STATE_STOPPING){
device->state = STATE_STOPPED;
return S_FALSE;
}
if(device->state == STATE_STARTING)
device->state = STATE_CAPTURING;
hr = IAudioCaptureClient_GetBuffer(device->capture, &buf, &packet_frames,
&flags, NULL, NULL);
if(FAILED(hr)){
WARN("GetBuffer failed: %08x\n", hr);
return hr;
}
packet_bytes = packet_frames * device->pwfx->nBlockAlign;
if(packet_bytes > device->buflen){
TRACE("audio glitch: dsound buffer too small for data\n");
skip_bytes = packet_bytes - device->buflen;
packet_bytes = device->buflen;
}
avail_bytes = device->buflen - device->write_pos_bytes;
if(avail_bytes > packet_bytes)
avail_bytes = packet_bytes;
memcpy(device->buffer + device->write_pos_bytes, buf + skip_bytes, avail_bytes);
capture_CheckNotify(device->capture_buffer, device->write_pos_bytes, avail_bytes);
packet_bytes -= avail_bytes;
if(packet_bytes > 0){
if(device->capture_buffer->flags & DSCBSTART_LOOPING){
memcpy(device->buffer, buf + skip_bytes + avail_bytes, packet_bytes);
capture_CheckNotify(device->capture_buffer, 0, packet_bytes);
}else{
device->state = STATE_STOPPED;
capture_CheckNotify(device->capture_buffer, 0, 0);
}
}
device->write_pos_bytes += avail_bytes + packet_bytes;
device->write_pos_bytes %= device->buflen;
hr = IAudioCaptureClient_ReleaseBuffer(device->capture, packet_frames);
if(FAILED(hr)){
WARN("ReleaseBuffer failed: %08x\n", hr);
return hr;
}
return S_OK;
}