?? cdaudio.cpp
字號:
// 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();
}
//打開設備
BOOL CCDAudio::Open( void )
{
if( m_bOpened )
return( TRUE );
m_bPaused = m_bPlaying = FALSE;
m_wDeviceID = 0;
//發送打開設備命令
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 );
}
//關閉設備
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;
}
//播放
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 );
}
//停止
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;
}
//暫停
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;
}
//獲得曲目數量
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 );
}
//獲得所有曲目的總長度（時間）
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 );
}
//獲得一個曲目的長度
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 );
}
//獲得當前播放的曲目
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 ) );
}
//獲得當前播放曲目前已經播放的分鐘數
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 ) );
}
//獲得當前播放曲目前經播放的秒數
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 ) );
}
//獲得幀數
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 ) );
}
//判斷光驅里的cd是否正常
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 );
}
//判斷曲目是否是音樂
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 );
}
//判斷是否正在播放
BOOL CCDAudio::IsPlaying( BOOL *pbPaused )
{
*pbPaused = m_bPaused;
return( m_bPlaying );
}
//跳躍到某個曲目的恰當地方
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 );
}
//向前跳躍給定時間
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();
}
//向后跳躍給定時間
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 );
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();
}
//打開光驅
void CCDAudio::OpenDrive( void )
{
if( m_bOpened ){
Stop();
mciSendCommand( m_wDeviceID, MCI_SET, MCI_SET_DOOR_OPEN, NULL );
}
}
//關閉光驅
void CCDAudio::CloseDrive( void )
{
if( m_bOpened ){
mciSendCommand( m_wDeviceID, MCI_SET, MCI_SET_DOOR_CLOSED, NULL );
Stop();
}
}
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