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Visual C++

Music.cpp：源码内容

							#include "stdafx.h"
#include "Music.h"
CMusic::CMusic(HWND hWnd)
{
        m_pDirectAudioPerformance = NULL;
		m_pDirectAudioLoader = NULL;
		m_pSegment = NULL;
		m_pGraph = NULL;
		m_pMediaControl = NULL;
		m_pMediaPosition = NULL;
		m_enumFormat = Unknown;
		CoInitialize(NULL);
		//Create the DirectAudio performance object
		CoCreateInstance(CLSID_DirectMusicPerformance, NULL, CLSCTX_INPROC, 
						IID_IDirectMusicPerformance8, (void**) &m_pDirectAudioPerformance);
		
		
		//Create the DirectAudio loader object
		CoCreateInstance(CLSID_DirectMusicLoader, NULL, CLSCTX_INPROC, 
						IID_IDirectMusicLoader8, (void**) &m_pDirectAudioLoader);
	
		
		//Initialise the performance object
		m_pDirectAudioPerformance->InitAudio(NULL, NULL, hWnd, DMUS_APATH_SHARED_STEREOPLUSREVERB,
										 64, DMUS_AUDIOF_ALL, NULL);
	
		GetCurrentDirectory(MAX_PATH, strSoundPath);
		MultiByteToWideChar(CP_ACP, 0, strSoundPath, -1, wstrSoundPath, MAX_PATH);
		m_pDirectAudioLoader->SetSearchDirectory(GUID_DirectMusicAllTypes, wstrSoundPath, FALSE);
	
		    CoCreateInstance(CLSID_FilterGraph, NULL,
            CLSCTX_INPROC, IID_IGraphBuilder, (void**)&m_pGraph);
			m_pGraph->QueryInterface(IID_IMediaControl, (void**)&m_pMediaControl);
			m_pGraph->QueryInterface(IID_IMediaPosition, (void**)&m_pMediaPosition);
			
}
CMusic::~CMusic()
{
        m_pDirectAudioPerformance->Stop(NULL, NULL, 0, 0);
		m_pDirectAudioPerformance->CloseDown();
		//SafeRRelease(m_pDirectAudioLoader);
		//SafeRRelease(m_pDirectAudioPerformance);
		m_pDirectAudioLoader->Release();
		m_pDirectAudioPerformance->Release();
		CoUninitialize();
}
void CMusic::Play(int t,LPSTR pStr)
{
	switch(t)
	{
	case 0:
            m_enumFormat = WavMidi;
			//初始化WAV文件，将文件名转换为unicode
			MultiByteToWideChar(CP_ACP, 0, "2-02 Ahead on Our Way Midi.mid", -1, wstrSoundPath, MAX_PATH);
			//加载声音
			m_pDirectAudioLoader->LoadObjectFromFile(CLSID_DirectMusicSegment, IID_IDirectMusicSegment8,
													 wstrSoundPath, (void**) &m_pSegment);
			m_pSegment->Download(m_pDirectAudioPerformance);
			m_pSegment->SetRepeats(-1);  //这里可以设置循环次数,-1为循环播放
			m_pDirectAudioPerformance->PlaySegmentEx(m_pSegment, NULL, NULL, 0, 0, NULL, NULL, NULL);
			break;
	case 1:
		    m_enumFormat = MP3;
			//初始化MP3文件，得到MP3文件所在的目录
			GetCurrentDirectory(MAX_PATH, strSoundPath);
			strcat(strSoundPath, pStr);//\Love.mp3
			//将文件名转换为unicode
			MultiByteToWideChar(CP_ACP, 0, strSoundPath, -1, wstrSoundPath, MAX_PATH);
			m_pGraph->RenderFile(wstrSoundPath, NULL);
			m_pMediaPosition->put_CurrentPosition(0);
			m_pMediaControl->Run();
			break;
	}
}

						