//---------------------------------------------------------------------------
// サウンドカードの出力でのオープン
// WFX.wFormatTag = WAVE_FORMAT_PCM;
// WFX.nChannels = 1;
// WFX.wBitsPerSample = 16;
// WFX.nSamplesPerSec = 11025;
// WFX.nBlockAlign = WORD(WFX.nChannels *(WFX.wBitsPerSample/8));
// WFX.nAvgBytesPerSec = WFX.nBlockAlign * WFX.nSamplesPerSec;
// WFX.cbSize = 0;
BOOL __fastcall CWave::OutOpen(LPWAVEFORMATEX pWFX, UINT IDDevice, DWORD Size)
{
if( m_pDLL ){
m_OutOpen = m_pDLL->OutOpen(pWFX->nSamplesPerSec, Size);
if( !m_OutOpen ) PumpMessages();
return m_OutOpen;
}
if( m_OutOpen ) OutAbort();
m_Error = 0;
m_OutBCC = 0x7fffffff;
m_OutWait = FALSE;
m_OutUnder = FALSE;
m_OutWP = m_OutRP = m_OutBC = 0;
m_OWFX = *pWFX;
m_OutLen = Size;
m_OutBuffSize = Size * (m_OWFX.wBitsPerSample/8) * m_OWFX.nChannels;
m_OutMemSize = sizeof(WAVEHDR) + m_OutBuffSize;
if( m_OutMemSize & 3 ) m_OutMemSize += 4 - (m_OutMemSize & 3);
m_OutAllocSize = m_OutMemSize * m_OutFifoSize;
m_OutEvent = ::CreateEvent(NULL, FALSE,FALSE,NULL);
if( (m_Error = ::waveOutOpen( &m_hout, IDDevice , pWFX, (DWORD)WaveOutProc, (DWORD)this, CALLBACK_FUNCTION ) ) != MMSYSERR_NOERROR ){
OutAbort();
return FALSE;
}
if( (m_Error = ::waveOutPause(m_hout))!= MMSYSERR_NOERROR ){
OutAbort();
return FALSE;
}
// バッファーの準備
m_pOutBase = new char[m_OutAllocSize];
::VirtualLock(m_pOutBase, m_OutAllocSize);
memset(m_pOutBase, 0, m_OutAllocSize);
LPSTR p = m_pOutBase;
for(int i = 0; i < m_OutFifoSize; i++, p += m_OutMemSize ){
m_pOutBuff[i] = (WAVEHDR *)p;
((WAVEHDR *)p)->dwBufferLength = m_OutBuffSize;
((WAVEHDR *)p)->dwFlags = 0;
((WAVEHDR *)p)->dwUser = NULL;
((WAVEHDR *)p)->dwLoops = NULL;
((WAVEHDR *)p)->lpData = p + sizeof(WAVEHDR);
if( (m_Error = ::waveOutPrepareHeader(m_hout, (WAVEHDR *)p, sizeof(WAVEHDR)) ) != MMSYSERR_NOERROR ){
OutAbort();
return FALSE;
}
}
m_OutOpen = TRUE;
m_OutFirst = TRUE;
return TRUE;
}
//---------------------------------------------------------------------------
BOOL __fastcall CWave::OutWrite(const SHORT *pData)
{
if( m_pDLL ){
return m_pDLL->OutWrite(pData);
}
int Len = m_OutLen;
int i;
if( !m_OutOpen ){
m_Error = 1;
return FALSE;
}
if( m_OutUnder ){
m_Error = 1;
OutClose();
return FALSE;
}
// 送信バッファ空き待ち
EnterCriticalSection(&m_OutCS);
if( m_OutBC >= m_OutFifoSize ){
m_OutWait++;
::LeaveCriticalSection(&m_OutCS);
if( ::WaitForSingleObject( m_OutEvent, WAVE_TIMEOUT_EVENT ) != WAIT_OBJECT_0 ){
m_Error = 2;
OutAbort();
return FALSE;
}
}
else {
::LeaveCriticalSection(&m_OutCS);
}
// データの変換
LPWAVEHDR hp = m_pOutBuff[m_OutWP];
SHORT *wp = (SHORT *)hp->lpData;
if( m_OWFX.nChannels == 2 ){
for( i = 0; i < Len; i++ ){
*wp++ = *pData;
*wp++ = *pData++;
}
}
else {
memcpy(wp, pData, sizeof(SHORT)*Len);
}
::waveOutWrite(m_hout, hp, sizeof(WAVEHDR) );
::EnterCriticalSection(&m_OutCS); // m_OutCS++が1命令では展開されない
m_OutBC++;
::LeaveCriticalSection(&m_OutCS);
if( m_OutFirst ){
if( (m_OutBC >= 8) || (m_OutBC >= (m_OutFifoSize-1)) ){
m_OutFirst = FALSE;
::waveOutRestart( m_hout );
}
}
m_OutWP++;
if( m_OutWP >= m_OutFifoSize){
m_OutWP = 0;
}
return TRUE;
}
