一个CD播放器源码

// CDAudio.cpp #include "stdafx.h" #include <mmsystem.h> #include "CDAudio.h" CCDAudio::CCDAudio() { m_bOpened = m_bPaused = m_bPlaying = FALSE; m_wDeviceID = 0; } CCDAudio::~CCDAudio() { Close(); } BOOL CCDAudio::Open( void ) { if( m_bOpened ) return( TRUE ); m_bPaused = m_bPlaying = FALSE; m_wDeviceID = 0; MCI_OPEN_PARMS OpenParms; OpenParms.lpstrDeviceType = (LPCSTR) MCI_DEVTYPE_CD_AUDIO; OpenParms.wDeviceID = 0; if( mciSendCommand( NULL, MCI_OPEN, MCI_WAIT | MCI_OPEN_TYPE | MCI_OPEN_TYPE_ID | MCI_OPEN_SHAREABLE, (DWORD)(LPVOID) &OpenParms ) ) return( FALSE ); m_wDeviceID = OpenParms.wDeviceID; m_bOpened = TRUE; MCI_SET_PARMS SetParms; SetParms.dwTimeFormat = MCI_FORMAT_TMSF; if( mciSendCommand( m_wDeviceID, MCI_SET, MCI_WAIT | MCI_SET_TIME_FORMAT, (DWORD)(LPVOID) &SetParms ) ){ Close (); return( FALSE ); } mciSendCommand( m_wDeviceID, MCI_SEEK, MCI_SEEK_TO_START, NULL ); return( TRUE ); } void CCDAudio::Close( void ) { if( !m_bOpened ) return; if( m_bPlaying || m_bPaused ) mciSendCommand( m_wDeviceID, MCI_STOP, NULL, NULL ); mciSendCommand( m_wDeviceID, MCI_CLOSE, MCI_WAIT, NULL ); m_bOpened = m_bPaused = m_bPlaying = FALSE; m_wDeviceID = 0; } BOOL CCDAudio::Play (void) { if( !Open() ) return( FALSE ); if( !IsAudioTrack( GetCurrentTrack() ) ) return( FALSE ); MCI_PLAY_PARMS PlayParms; PlayParms.dwCallback = NULL; PlayParms.dwFrom = MCI_MAKE_TMSF( GetCurrentTrack(), GetMinutes(), GetSeconds(), GetFrames() ); if( mciSendCommand( m_wDeviceID, MCI_PLAY, MCI_FROM, (DWORD)(LPVOID) &PlayParms ) ) return( FALSE ); m_bPaused = FALSE; m_bPlaying = TRUE; return( TRUE ); } void CCDAudio::Stop( void ) { if( !m_bOpened || !m_bPlaying ) return; mciSendCommand( m_wDeviceID, MCI_STOP, MCI_WAIT, NULL ); mciSendCommand( m_wDeviceID, MCI_SEEK, MCI_SEEK_TO_START, NULL ); m_bPlaying = FALSE; m_bPaused = FALSE; } void CCDAudio::Pause( void ) { if( !m_bOpened || !m_bPlaying ) return; MCI_PLAY_PARMS PlayParms; if( mciSendCommand( m_wDeviceID, MCI_PAUSE, 0, (DWORD)(LPVOID) &PlayParms ) ) return; m_bPaused = TRUE; } int CCDAudio::GetTotalTracks( void ) { if( !m_bOpened ) return( -1 ); MCI_STATUS_PARMS StatusParms; StatusParms.dwItem = MCI_STATUS_NUMBER_OF_TRACKS; if( mciSendCommand( m_wDeviceID, MCI_STATUS, MCI_STATUS_ITEM, (DWORD)(LPVOID) &StatusParms ) ) return( -1 ); return( (int) StatusParms.dwReturn ); } void CCDAudio::GetTotalLength( int *pnMinutes, int *pnSeconds ) { *pnMinutes = -1; *pnSeconds = -1; if( !m_bOpened ) return; MCI_STATUS_PARMS StatusParms; StatusParms.dwItem = MCI_STATUS_LENGTH; if( mciSendCommand( m_wDeviceID, MCI_STATUS, MCI_WAIT | MCI_STATUS_ITEM, (DWORD)(LPVOID) &StatusParms ) ) return; *pnMinutes = MCI_MSF_MINUTE( StatusParms.dwReturn ); *pnSeconds = MCI_MSF_SECOND( StatusParms.dwReturn ); } void CCDAudio::GetTrackLength( int nTrack, int *pnMinutes, int *pnSeconds ) { *pnMinutes = -1; *pnSeconds = -1; if( !m_bOpened ) return; MCI_STATUS_PARMS StatusParms; StatusParms.dwItem = MCI_STATUS_LENGTH; StatusParms.dwTrack = (DWORD) nTrack; if( mciSendCommand( m_wDeviceID, MCI_STATUS, MCI_WAIT | MCI_STATUS_ITEM | MCI_TRACK, (DWORD)(LPVOID) &StatusParms ) ) return; *pnMinutes = MCI_MSF_MINUTE( StatusParms.dwReturn ); *pnSeconds = MCI_MSF_SECOND( StatusParms.dwReturn ); } int CCDAudio::GetCurrentTrack( void ) { if( !m_bOpened ) return( -1 ); MCI_STATUS_PARMS StatusParms; StatusParms.dwItem = MCI_STATUS_POSITION; if( mciSendCommand( m_wDeviceID, MCI_STATUS, MCI_WAIT | MCI_STATUS_ITEM, (DWORD)(LPVOID) &StatusParms ) ) return( -1 ); return( MCI_TMSF_TRACK( StatusParms.dwReturn ) ); } int CCDAudio::GetMinutes( void ) { if( !m_bOpened ) return( -1 ); MCI_STATUS_PARMS StatusParms; StatusParms.dwItem = MCI_STATUS_POSITION; if( mciSendCommand( m_wDeviceID, MCI_STATUS, MCI_WAIT | MCI_STATUS_ITEM, (DWORD)(LPVOID) &StatusParms ) ) return( -1 ); return( MCI_TMSF_MINUTE( StatusParms.dwReturn ) ); } int CCDAudio::GetSeconds( void ) { if( !m_bOpened ) return( -1 ); MCI_STATUS_PARMS StatusParms; StatusParms.dwItem = MCI_STATUS_POSITION; if( mciSendCommand( m_wDeviceID, MCI_STATUS, MCI_WAIT | MCI_STATUS_ITEM, (DWORD)(LPVOID) &StatusParms ) ) return( -1 ); return( MCI_TMSF_SECOND( StatusParms.dwReturn ) ); } int CCDAudio::GetFrames( void ) { if( !m_bOpened ) return( -1 ); MCI_STATUS_PARMS StatusParms; StatusParms.dwItem = MCI_STATUS_POSITION; if( mciSendCommand( m_wDeviceID, MCI_STATUS, MCI_WAIT | MCI_STATUS_ITEM, (DWORD)(LPVOID) &StatusParms ) ) return( -1 ); return( MCI_TMSF_FRAME( StatusParms.dwReturn ) ); } BOOL CCDAudio::IsDriveReady( void ) { if( !m_bOpened ) return( FALSE ); MCI_STATUS_PARMS StatusParms; StatusParms.dwItem = MCI_STATUS_MODE; if( mciSendCommand( m_wDeviceID, MCI_STATUS, MCI_STATUS_ITEM, (DWORD)(LPVOID) &StatusParms ) ) return( FALSE ); if( StatusParms.dwReturn == MCI_MODE_NOT_READY || StatusParms.dwReturn == MCI_MODE_OPEN ) return( FALSE ); StatusParms.dwItem = MCI_STATUS_MEDIA_PRESENT; if( mciSendCommand( m_wDeviceID, MCI_STATUS, MCI_STATUS_ITEM, (DWORD)(LPVOID) &StatusParms ) ) return( FALSE ); return( (BOOL) StatusParms.dwReturn ); } BOOL CCDAudio::IsAudioTrack( int nTrack ) { if( !m_bOpened ) return( FALSE ); MCI_STATUS_PARMS StatusParms; StatusParms.dwItem = MCI_CDA_STATUS_TYPE_TRACK; StatusParms.dwTrack = nTrack; if( mciSendCommand( m_wDeviceID, MCI_STATUS, MCI_STATUS_ITEM | MCI_TRACK, (DWORD)(LPVOID) &StatusParms ) ) return( FALSE ); if( StatusParms.dwReturn == MCI_CDA_TRACK_AUDIO ) return( TRUE ); return( FALSE ); } BOOL CCDAudio::IsPlaying( BOOL *pbPaused ) { *pbPaused = m_bPaused; return( m_bPlaying ); } BOOL CCDAudio::SeekTo( int nTrack, int nMinute, int nSecond, int nFrame ) { if( !m_bOpened ) return( FALSE ); MCI_SEEK_PARMS SeekParms; SeekParms.dwTo = MCI_MAKE_TMSF( nTrack, nMinute, nSecond, nFrame ); if( m_bPlaying && !m_bPaused ) mciSendCommand( m_wDeviceID, MCI_PAUSE, 0, NULL ); if( mciSendCommand( m_wDeviceID, MCI_SEEK, MCI_TO | MCI_WAIT, (DWORD)(LPVOID) &SeekParms ) ) return( FALSE ); if( m_bPlaying && !m_bPaused ) Play(); return( TRUE ); } void CCDAudio::SkipForward( int nSeconds ) { if( !m_bOpened ) return; MCI_SET_PARMS SetParms; SetParms.dwTimeFormat = MCI_FORMAT_MILLISECONDS; mciSendCommand( m_wDeviceID, MCI_SET, MCI_WAIT | MCI_SET_TIME_FORMAT, (DWORD)(LPVOID) &SetParms ); MCI_STATUS_PARMS StatusParms; DWORD dwPos; StatusParms.dwItem = MCI_STATUS_POSITION; mciSendCommand( m_wDeviceID, MCI_STATUS, MCI_WAIT | MCI_STATUS_ITEM, (DWORD)(LPVOID) &StatusParms ); dwPos = StatusParms.dwReturn; dwPos += (DWORD) nSeconds * 1000; MCI_SEEK_PARMS SeekParms; SeekParms.dwTo = dwPos; if( m_bPlaying && !m_bPaused ) mciSendCommand( m_wDeviceID, MCI_PAUSE, 0, NULL ); mciSendCommand( m_wDeviceID, MCI_SEEK, MCI_TO | MCI_WAIT, (DWORD)(LPVOID) &SeekParms ); SetParms.dwTimeFormat = MCI_FORMAT_TMSF; mciSendCommand( m_wDeviceID, MCI_SET, MCI_WAIT | MCI_SET_TIME_FORMAT, (DWORD)(LPVOID) &SetParms ); if( m_bPlaying && !m_bPaused ) Play(); } void CCDAudio::SkipBack( int nSeconds ) { if( !m_bOpened ) return; MCI_SET_PARMS SetParms; SetParms.dwTimeFormat = MCI_FORMAT_MILLISECONDS; mciSendCommand( m_wDeviceID, MCI_SET, MCI_WAIT | MCI_SET_TIME_FORMAT, (DWORD)(LPVOID) &SetParms ); MCI_STATUS_PARMS StatusParms; DWORD dwPos; StatusParms.dwItem = MCI_STATUS_POSITION; mciSendCommand( m_wDeviceID, MCI_STATUS, MCI_WAIT | MCI_STATUS_ITEM, (DWORD)(LPVOID) &StatusParms ); 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