基于 mciSendCommand 的 C++ 音乐播放类实现

以下是基于 mciSendCommand 的 C++ 音乐播放类实现代码。

PlayWave.h

#pragma once
#include "mmsystem.h"
#define WAVE_PAUSE 1
#define WAVE_RESUME 2
class CPlayWave {
public:
    CPlayWave(void);
    ~CPlayWave(void);
    DWORD InitDevice();
    DWORD TerminalDevice();
    DWORD Play(HWND hWnd, LPCTSTR pFileName);
    DWORD Stop();
    DWORD Pause();
protected:
    MCIDEVICEID m_DeviceID;
    MCIDEVICEID m_ElementID;
};

PlayWave.cpp

#include "StdAfx.h"
#include "PlayWave.h"
#include <Digitalv.h>
#pragma comment(lib, "winmm.lib")
CPlayWave::CPlayWave(void) {
    m_DeviceID = 0;
    m_ElementID = 0;
    InitDevice();
}
CPlayWave::~() {
     (m_ElementID) {
        ();
    }
     (m_DeviceID) {
        ();
    }
}
{
    DWORD dwResult = ;
     (m_DeviceID == ) {
        MCI_OPEN_PARMS mciInitParms;
        mciInitParms.lpstrDeviceType = (LPTSTR)MCI_DEVTYPE_WAVEFORM_AUDIO;
        dwResult = (, MCI_OPEN, MCI_OPEN_TYPE | MCI_OPEN_TYPE_ID | MCI_WAIT, (DWORD)(LPVOID)&mciInitParms);
        m_DeviceID = mciInitParms.wDeviceID;
    }
     dwResult;
}
{
    DWORD dwResult = ;
     (m_DeviceID) {
        dwResult = (m_DeviceID, MCI_CLOSE, , );
    }
    m_DeviceID = ;
     dwResult;
}
{
    MCI_OPEN_PARMS mciOpenParms;
    (&mciOpenParms, , (MCI_OPEN_PARMS));
    mciOpenParms.lpstrElementName = pFileName;
    DWORD dwResult = ;
    dwResult = (m_DeviceID, MCI_OPEN, MCI_OPEN_ELEMENT, (DWORD)(LPVOID)&mciOpenParms);
     (!dwResult) {
        m_ElementID = mciOpenParms.wDeviceID;
        MCI_PLAY_PARMS mciPlayParms;
        mciPlayParms.dwCallback = (DWORD)hWnd;
        dwResult = (m_ElementID, MCI_PLAY, MCI_DGV_PLAY_REPEAT, (DWORD)(LPVOID)&mciPlayParms);
    }
     dwResult;
}
{
    DWORD dwResult = ;
     (m_ElementID) {
        dwResult = (m_ElementID, MCI_CLOSE, , );
        m_ElementID = ;
    }
     dwResult;
}
{
    DWORD dwResult = ;
     BOOL bPlayMode = TRUE;
     (m_ElementID) {
         (bPlayMode) {
            dwResult = (m_ElementID, MCI_PAUSE, , );
            dwResult = WAVE_PAUSE;
        }  {
            dwResult = (m_ElementID, MCI_RESUME, , );
            dwResult = WAVE_RESUME;
        }
        bPlayMode = !bPlayMode;
    }
     dwResult;
}