C++WTL基于MCI的音频播放器源码

抽时间赶工完成的播放器，实现很简洁，功能简单。播放功能实现源码class MCIPlayer： 

#pragma once

#include<mmsystem.h> 
#pragma comment(lib,"winmm.lib") 

#include <Digitalv.h>

class MCIPlayer
{
public:
    MCIPlayer();
    ~MCIPlayer(void);

    // 播放
    void Play(LPCTSTR lpAudioFile, DWORD* pAudioLen = NULL);
    // 暂停
    void Pause();
    // 继续
    void Resume();
    // 停止
    void Stop();
    // 播放时间
    DWORD GetAudioLength(LPCTSTR lpAudioFile);
    // 音量
    void SetVolume(DWORD dwVolume); // volume: 0-1000

private:
    MCIDEVICEID m_idDevPlay;
};

 

#include "StdAfx.h"
#include "MCIPlayer.h"


MCIPlayer::MCIPlayer()
    : m_idDevPlay(0)
{
}

MCIPlayer::~MCIPlayer(void)
{
}

void MCIPlayer::Play(LPCTSTR lpAudioFile, DWORD* pAudioLen)
{
    ATLASSERT(0 == m_idDevPlay);
    // 打开设备及文件
    MCI_OPEN_PARMS mciOpen;
    mciOpen.lpstrElementName = lpAudioFile;
    MCIERROR err = mciSendCommand(0, MCI_OPEN,  MCI_WAIT | MCI_OPEN_ELEMENT,  (DWORD_PTR)&mciOpen);
    
    if (err != 0)
    {
        return;
    }

    m_idDevPlay = mciOpen.wDeviceID;

    if (pAudioLen)
    {
        MCI_STATUS_PARMS mciStatus;
        mciStatus.dwItem = MCI_STATUS_LENGTH;
        mciSendCommand(mciOpen.wDeviceID, MCI_STATUS, MCI_STATUS_ITEM, (DWORD_PTR)&mciStatus);
        *pAudioLen = mciStatus.dwReturn;
    }
    // 播放
    MCI_PLAY_PARMS mciPlay;
    mciSendCommand(mciOpen.wDeviceID, MCI_PLAY, 0,  (DWORD_PTR)&mciPlay);
}

void MCIPlayer::Pause()
{
    ATLASSERT(m_idDevPlay);
    
    MCI_GENERIC_PARMS mciPause;
    mciSendCommand(m_idDevPlay, MCI_PAUSE, 0, (DWORD_PTR)&mciPause);
}

void MCIPlayer::Resume()
{
    ATLASSERT(m_idDevPlay);
    
    MCI_GENERIC_PARMS mciPause;
    mciSendCommand(m_idDevPlay, MCI_RESUME, 0, (DWORD_PTR)&mciPause);
}

void MCIPlayer::Stop()
{
    ATLASSERT(m_idDevPlay);

    MCI_GENERIC_PARMS mciStop;
    mciSendCommand(m_idDevPlay, MCI_STOP, 0, (DWORD_PTR)&mciStop);
    mciSendCommand(m_idDevPlay, MCI_CLOSE, 0, NULL);
    m_idDevPlay = 0;
}

DWORD MCIPlayer::GetAudioLength(LPCTSTR lpAudioFile)
{
    // 打开设备及文件
    MCI_OPEN_PARMS mciOpen;
    mciOpen.lpstrElementName = lpAudioFile;
    MCIERROR err = mciSendCommand(0, MCI_OPEN,  MCI_WAIT | MCI_OPEN_ELEMENT,  (DWORD_PTR)&mciOpen);
    // 文件解析失败
    if (err != 0)
    {
        return 0;
    }
    // 获取文件播放的总长度信息
    MCI_STATUS_PARMS mciStatus;
    mciStatus.dwItem = MCI_STATUS_LENGTH;
    mciSendCommand(mciOpen.wDeviceID, MCI_STATUS, MCI_STATUS_ITEM, (DWORD_PTR)&mciStatus);
    mciSendCommand(mciOpen.wDeviceID, MCI_CLOSE, 0, NULL);

    return mciStatus.dwReturn; 
}

void MCIPlayer::SetVolume( DWORD dwVolume )
{
    ATLASSERT(m_idDevPlay);
    ATLASSERT(dwVolume <= 1000);

    MCI_DGV_SETAUDIO_PARMS mciSetAudio;  
    mciSetAudio.dwItem = MCI_DGV_SETAUDIO_VOLUME;  
    mciSetAudio.dwValue = dwVolume; // Volume(0-1000)  
    mciSendCommand(m_idDevPlay, MCI_SETAUDIO, MCI_DGV_SETAUDIO_VALUE | MCI_DGV_SETAUDIO_ITEM, (DWORD_PTR)&mciSetAudio);  
}

界面框架使用WTL，完整源码附上：

　　　　https://files.cnblogs.com/asight/AudioPlayer.zip
给个截图：