//打开设备
//typedef struct {
//DWORD dwCallback;        //指定一个窗口句柄
//MCIDEVICEID wDeviceID;   //为成功打开的文件返回　设备标识符. 
//LPCSTR lpstrDeviceType;  //设备类型的名字或常量标识. (设备名可以从注册表或者 SYSTEM.INI 文件中获得) 
//LPCSTR lpstrElementName; //设备元素 (通常是打开的文件全路径). 
//LPCSTR lpstrAlias//可选别名
//DWORD dwBufferSeconds;
//} MCI_WAVE_OPEN_PARMS;




//播放文件
//typedef struct {
//DWORD dwCallback;//指定一个窗口句柄
//DWORD dwFrom;//设置播放起始点
//DWORD dwTo;//设置播放结束点
//} MCI_PLAY_PARMS;


//查询信息
//typedef struct {
//DWORD dwCallback;
//DWORD dwReturn;//返回的信息内容
//DWORD dwItem;//请求查询的内容
//DWORD dwTrack;//轨道的长度或数目
//} MCI_STATUS_PARMS;


 /*
 * 函数名称：MCI_Open
 * 函数介绍：用mci命令打开文件
 * 输入参数：CString strPath, 文件的路径
 * 输出参数：无
 * 返回值 ：mci命令的错误信息
 */

DWORD dlg_login::MCIOpen(const CString &strPath)
{
	//打开MCI设备
	MCI_OPEN_PARMS mciOP;
	DWORD opReturn;
	MCIDEVICEID wIDDevioce;  //保存设备ID
	mciOP.lpstrDeviceType = NULL;
	mciOP.lpstrElementName = strPath;  //设置打开的文件的名称
	opReturn = mciSendCommand(NULL, MCI_OPEN, MCI_OPEN_ELEMENT, (DWORD)(LPVOID)&mciOP);
	if (opReturn == 0)
	{
		wIDDevioce = mciOP.wDeviceID;//播放设备Id
		wDevioceId = mciOP.wDeviceID;

		//设置设备信息
		MCI_SET_PARMS mciSet;
		mciSet.dwTimeFormat = MCI_FORMAT_MILLISECONDS; //设置时间单位为毫秒
		mciSendCommand(wDevioceId, MCI_SET, MCI_SET_TIME_FORMAT, (DWORD)(LPVOID)&mciSet);
		
		//设置当前播放位置跳转60秒
		MCISeek(100);
		//音频播放
		MCIPlay();
		
		MCI_STATUS_PARMS mciStatus;
		mciStatus.dwItem = MCI_STATUS_TIME_FORMAT;
		DWORD sta2Return = mciSendCommand(wIDDevioce, MCI_STATUS, MCI_STATUS_ITEM, (DWORD)(LPVOID)&mciStatus);
		DWORD music_timestyle = mciStatus.dwReturn; //获得当前的时间格式
		
		mciStatus.dwItem = MCI_STATUS_MODE;
		DWORD sta3Return = mciSendCommand(wIDDevioce, MCI_STATUS, MCI_STATUS_ITEM, (DWORD)(LPVOID)&mciStatus);
		DWORD music_playstyle = mciStatus.dwReturn; //获得当前播放工作模式 播放 526  暂停525 
	}
	else
		wIDDevioce = NULL;
	return opReturn;
}

DWORD dlg_login::MCIPlay()
{
    MCI_PLAY_PARMS mciPP;
    DWORD opReturn;
    opReturn = mciSendCommand(wDevioceId, MCI_PLAY, MCI_NOTIFY, (DWORD)&mciPP);
    return opReturn;
}

DWORD dlg_login::MCIStatus_music_length()
{
    MCI_STATUS_PARMS mciStatus;
    mciStatus.dwItem = MCI_STATUS_LENGTH;
    DWORD staReturn = mciSendCommand(wDevioceId, MCI_STATUS, MCI_STATUS_ITEM, (DWORD)(LPVOID)&mciStatus);
    DWORD music_alltime = mciStatus.dwReturn / 1000; //音乐总时间
    return music_alltime;
}

DWORD dlg_login::MCIStatus_music_pos()
{
    MCI_STATUS_PARMS mciStatus;
    mciStatus.dwItem = MCI_STATUS_POSITION;
    DWORD sta1Return = mciSendCommand(wDevioceId, MCI_STATUS, MCI_STATUS_ITEM, (DWORD)(LPVOID)&mciStatus);
    DWORD music_timeing = mciStatus.dwReturn / 1000; //音乐当前播放时间
    return music_timeing;
}

 

//从制定位置开始播放
void send_music_from_pos()
{
    MCI_STATUS_PARMS mciStatus;
    mciStatus.dwItem = MCI_STATUS_POSITION;
    DWORD sta1Return = mciSendCommand(wDevioceId, MCI_STATUS, MCI_STATUS_ITEM, (DWORD)(LPVOID)&mciStatus);
    DWORD music_timeing = mciStatus.dwReturn / 1000; //音乐当前播放时间
    MCI_PLAY_PARMS PlayParms;
    PlayParms.dwFrom = music_timeing; // 指定从什么地方（时间）播放
    DWORD ret1 = mciSendCommand(wDevioceId, MCI_PLAY, MCI_NOTIFY, (DWORD)(LPVOID)&PlayParms);
}

//关闭指定设备

void close_mci()
{
    DWORD retclose=mciSendCommand(wDevioceId, MCI_CLOSE, NULL, NULL);
}

 

//调节音量
DWORD dlg_login::MCISetVolume(DWORD dwVol)
{
	MCI_DGV_SETAUDIO_PARMS	mciSetAudioPara;
	mciSetAudioPara.dwCallback	= NULL;
	mciSetAudioPara.dwItem	 = MCI_DGV_SETAUDIO_VOLUME;
	mciSetAudioPara.dwValue	 = http://www.mamicode.com/dwVol; //此处就是音量大小 (0--1000)>




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