//=============================================================================
// Move to the previous track
//=============================================================================
MCIERROR CCDAudio::Backward()
{
TCHAR szBuff2[128], szBuff3[32];
int nCurrTrack = GetCurrentTrack();
const int nLastTrack = GetTracksCount();
if( (nCurrTrack == 0) || (nLastTrack == 0) || (nCurrTrack == 1) )
return 0;
nCurrTrack--;
_stprintf( szBuff2, _T("status cdaudio position track %d"), nCurrTrack );
m_nErrorCode = mciSendString( szBuff2, szBuff3, sizeof(szBuff3), NULL );
if( m_nErrorCode != 0 ){
MCIError( m_nErrorCode );
return m_nErrorCode;
}
memset(szBuff2, 0, sizeof(szBuff2));
_stprintf( szBuff2, _T("play cdaudio from %s"), szBuff3 );
m_nErrorCode = mciSendString( szBuff2, NULL, 0, NULL );
if( m_nErrorCode != 0 ){
MCIError( m_nErrorCode );
return m_nErrorCode;
}
return m_nErrorCode;
}
//***************************************************************************
BOOL MCISetVideoDrawProc( WORD wDeviceID, VIDEO_DRAWDIB_PROC lpDrawDibProc, VIDEO_DRAWDC_PROC lpDrawDCProc )
//***************************************************************************
{
DWORD dwRes;
MCI_DGV_SETVIDEO_PARMS mciSet;
DWORD dwDrawProc;
if ( !wDeviceID )
return FALSE;
lpMyDrawDibProc = lpDrawDibProc;
lpMyDrawDCProc = lpDrawDCProc;
if ( !lpMyDrawDibProc && !lpMyDrawDCProc )
dwDrawProc = NULL;
else
dwDrawProc = (DWORD)MCIDrawProc;
mciSet.dwValue = dwDrawProc; //MakeProcInstance( lpDrawProc, GetApp()->GetInstance() );
mciSet.dwItem = MCI_AVI_SETVIDEO_DRAW_PROCEDURE;
if ( (dwRes = mciSendCommand( wDeviceID, MCI_SETVIDEO,
(DWORD)MCI_DGV_SETVIDEO_ITEM | MCI_DGV_SETVIDEO_VALUE,
(DWORD)(LPMCI_DGV_SETVIDEO_PARMS)&mciSet )) )
{
MCIError(dwRes);
return FALSE;
}
return TRUE;
}
//=============================================================================
// Stop playing CD Audio
//=============================================================================
MCIERROR CCDAudio::Stop()
{
m_nErrorCode = mciSendString( _T("stop cdaudio"), NULL, 0, NULL );
// handle error
if( m_nErrorCode != 0 ){
MCIError( m_nErrorCode );
return m_nErrorCode;
}
m_nErrorCode = mciSendString( _T("seek cdaudio to start"), NULL, 0, NULL );
if( m_nErrorCode != 0 ){
MCIError( m_nErrorCode );
return m_nErrorCode;
}
return m_nErrorCode;
}
//=============================================================================
// Pause playing CD Audio
//=============================================================================
MCIERROR CCDAudio::Pause()
{
m_nErrorCode = mciSendString( _T("pause cdaudio"), NULL, 0, NULL );
if( m_nErrorCode != 0 ){
MCIError( m_nErrorCode );
return m_nErrorCode;
}
return m_nErrorCode;
}
//=============================================================================
// Return the current track number
//=============================================================================
int CCDAudio::GetCurrentTrack()
{
TCHAR szBuff[16];
m_nErrorCode = mciSendString( _T("status cdaudio current track"), szBuff, sizeof(szBuff), NULL );
if( m_nErrorCode != 0 ){
MCIError( m_nErrorCode );
return 0;
}
return ATOI(szBuff);
}
//=============================================================================
// Return the count of tracks
//=============================================================================
int CCDAudio::GetTracksCount()
{
TCHAR szBuff[16];
m_nErrorCode = mciSendString( _T("status cdaudio number of tracks"), szBuff, sizeof(szBuff), NULL );
if( m_nErrorCode != 0 ){
MCIError( m_nErrorCode );
return 0;
}
return ATOI(szBuff);
}
//=============================================================================
// Move to the next track
//=============================================================================
MCIERROR CCDAudio::Forward()
{
TCHAR szBuff2[128], szBuff3[32];
int nCurrTrack = GetCurrentTrack();
const int nLastTrack = GetTracksCount();
// now the current track is the last track
if( (nCurrTrack == nLastTrack) || (nLastTrack == 0) )
return 0;
// increment track position
nCurrTrack++;
// form the command string
_stprintf( szBuff2, _T("status cdaudio position track %d"), nCurrTrack );
// send the command string
m_nErrorCode = mciSendString( szBuff2, szBuff3, sizeof(szBuff3), NULL );
if( m_nErrorCode != 0 ){
MCIError( m_nErrorCode );
return m_nErrorCode;
}
memset(szBuff2, 0, sizeof(szBuff2));
// form the command string
_stprintf( szBuff2, _T("play cdaudio from %s"), szBuff3 );
// send the command string
m_nErrorCode = mciSendString( szBuff2, NULL, 0, NULL );
if( m_nErrorCode != 0 ){
MCIError( m_nErrorCode );
return m_nErrorCode;
}
return m_nErrorCode;
}
//=============================================================================
// Start playing CD Audio on given position
//=============================================================================
MCIERROR CCDAudio::Play(const int nPos)
{
TCHAR szBuff[128];
// form the connection string
_stprintf( szBuff, _T("play cdaudio from %02d:%02d:00"), (nPos / 60), (nPos % 60) );
// send the command string
m_nErrorCode = mciSendString( szBuff, NULL, 0, NULL );
if( m_nErrorCode != 0 ){
MCIError( m_nErrorCode );
return m_nErrorCode;
}
return m_nErrorCode;
}
//=============================================================================
// Return the total tracks length
//=============================================================================
int CCDAudio::GetLenghtAllTracks()
{
TCHAR szBuff[16];
TCHAR min[3], sec[3];
m_nErrorCode = 0;
m_nErrorCode = mciSendString( _T("status cdaudio length"), szBuff, sizeof(szBuff), NULL );
if( m_nErrorCode != 0 ){
MCIError( m_nErrorCode );
return 0;
}
STRNCPY( min, szBuff, 2 );
STRNCPY( sec, (szBuff + 3), 2 );
return ((ATOI(min) * 60) + ATOI(sec));
}
//=============================================================================
// Return the current track position in seconds
//=============================================================================
int CCDAudio::GetCurrentPos()
{
if( IsMediaInsert() )
{
TCHAR szBuff[16];
TCHAR min[3], sec[3];
m_nErrorCode = 0;
m_nErrorCode = mciSendString( _T("status cdaudio position"), szBuff, sizeof(szBuff), NULL );
if( m_nErrorCode != 0 ){
MCIError( m_nErrorCode );
return 0;
}
STRNCPY( min, szBuff, 2 );
STRNCPY( sec, (szBuff + 3), 2 );
return ((ATOI(min) * 60) + ATOI(sec));
}
return 0;
}
