RString RageSoundDriver_WaveOut::Init()
{
m_iSampleRate = PREFSMAN->m_iSoundPreferredSampleRate;
if( m_iSampleRate == 0 )
m_iSampleRate = 44100;
WAVEFORMATEX fmt;
fmt.wFormatTag = WAVE_FORMAT_PCM;
fmt.nChannels = channels;
fmt.cbSize = 0;
fmt.nSamplesPerSec = m_iSampleRate;
fmt.wBitsPerSample = 16;
fmt.nBlockAlign = fmt.nChannels * fmt.wBitsPerSample / 8;
fmt.nAvgBytesPerSec = fmt.nSamplesPerSec * fmt.nBlockAlign;
MMRESULT ret = waveOutOpen( &m_hWaveOut, WAVE_MAPPER, &fmt, (DWORD_PTR) m_hSoundEvent, NULL, CALLBACK_EVENT );
if( ret != MMSYSERR_NOERROR )
return wo_ssprintf( ret, "waveOutOpen failed" );
ZERO( m_aBuffers );
for(int b = 0; b < num_chunks; ++b)
{
m_aBuffers[b].dwBufferLength = chunksize;
m_aBuffers[b].lpData = new char[chunksize];
ret = waveOutPrepareHeader( m_hWaveOut, &m_aBuffers[b], sizeof(m_aBuffers[b]) );
if( ret != MMSYSERR_NOERROR )
return wo_ssprintf( ret, "waveOutPrepareHeader failed" );
m_aBuffers[b].dwFlags |= WHDR_DONE;
}
LOG->Info( "WaveOut software mixing at %i hz", m_iSampleRate );
/* We have a very large writeahead; make sure we have a large enough decode
* buffer to recover cleanly from underruns. */
SetDecodeBufferSize( buffersize_frames * 3/2 );
StartDecodeThread();
MixingThread.SetName( "Mixer thread" );
MixingThread.Create( MixerThread_start, this );
return RString();
}
static void GetSoundDriverDebugInfo()
{
int cnt = waveOutGetNumDevs();
for(int i = 0; i < cnt; ++i)
{
WAVEOUTCAPS caps;
MMRESULT ret = waveOutGetDevCaps(i, &caps, sizeof(caps));
if(ret != MMSYSERR_NOERROR)
{
LOG->Info(wo_ssprintf(ret, "waveOutGetDevCaps(%i) failed", i));
continue;
}
LOG->Info("Sound device %i: %s, %i.%i, MID %i, PID %i %s", i, caps.szPname,
HIBYTE(caps.vDriverVersion),
LOBYTE(caps.vDriverVersion),
caps.wMid, caps.wPid,
caps.dwSupport & WAVECAPS_SAMPLEACCURATE? "":"(INACCURATE)");
}
}
bool RageSoundDriver_WaveOut::GetData()
{
/* Look for a free buffer. */
int b;
for( b = 0; b < num_chunks; ++b )
if( m_aBuffers[b].dwFlags & WHDR_DONE )
break;
if( b == num_chunks )
return false;
/* Call the callback. */
this->Mix( (int16_t *) m_aBuffers[b].lpData, chunksize_frames, m_iLastCursorPos, GetPosition() );
MMRESULT ret = waveOutWrite( m_hWaveOut, &m_aBuffers[b], sizeof(m_aBuffers[b]) );
if( ret != MMSYSERR_NOERROR )
FAIL_M( wo_ssprintf(ret, "waveOutWrite failed") );
/* Increment m_iLastCursorPos. */
m_iLastCursorPos += chunksize_frames;
return true;
}
int64_t RageSoundDriver_WaveOut::GetPosition() const
{
MMTIME tm;
tm.wType = TIME_SAMPLES;
MMRESULT ret = waveOutGetPosition( m_hWaveOut, &tm, sizeof(tm) );
if( ret != MMSYSERR_NOERROR )
FAIL_M( wo_ssprintf(ret, "waveOutGetPosition failed") );
return tm.u.sample;
}
