Question

有谁能告诉我在MFC（VC++）中如何添加声音？

Answer 1

源程序清单如下： LPSTR szFileName;//声音文件名 MMCKINFO mmckinfoParent; MMCKINFO mmckinfoSubChunk; DWORD dwFmtSize; HMMIO m_hmmio;//音频文件句柄 DWORD m_WaveLong; HPSTR lpData;//音频数据 HANDLE m_hData; HANDLE m_hFormat; WAVEFORMATEX * lpFormat; DWORD m_dwDataOffset; DWORD m_dwDataSize; WAVEHDR pWaveOutHdr; WAVEOUTCAPS pwoc; HWAVEOUT hWaveOut; //打开波形文件 if(!(m_hmmio=mmioOpen(szFileName,NULL,MMIO_READ|MMIO_ALLOCBUF))) { //File open Error Error("Failed to open the file.");//错误处理函数 return false; } //检查打开文件是否是声音文件 mmckinfoParent.fccType =mmioFOURCC('W','A','V','E'); if(mmioDescend(m_hmmio,(LPMMCKINFO)&mmckinfoParent,NULL,MMIO_FINDRIFF)) { //NOT WAVE FILE AND QUIT } //寻找 'fmt' 块 mmckinfoSubChunk.ckid =mmioFOURCC('f','m','t',' '); if(mmioDescend(m_hmmio,&mmckinfoSubChunk,&mmckinfoParent,MMIO_FINDCHUNK)) { //Can't find 'fmt' chunk } //获得 'fmt '块的大小，申请内存 dwFmtSize=mmckinfoSubChunk.cksize ; m_hFormat=LocalAlloc(LMEM_MOVEABLE,LOWORD(dwFmtSize)); if(!m_hFormat) { //failed alloc memory } lpFormat=(WAVEFORMATEX*)LocalLock(m_hFormat); if(!lpFormat) { //failed to lock the memory } if((unsigned long)mmioRead(m_hmmio,(HPSTR)lpFormat,dwFmtSize)!=dwFmtSize) { //failed to read format chunk } //离开 fmt 块 mmioAscend(m_hmmio,&mmckinfoSubChunk,0); //寻找 'data' 块 mmckinfoSubChunk.ckid=mmioFOURCC('d','a','t','a'); if(mmioDescend(m_hmmio,&mmckinfoSubChunk,&mmckinfoParent,MMIO_FINDCHUNK)) { //Can't find 'data' chunk } //获得 'data'块的大小 m_dwDataSize=mmckinfoSubChunk.cksize ; m_dwDataOffset =mmckinfoSubChunk.dwDataOffset ; if(m_dwDataSize==0L) { //no data in the 'data' chunk } //为音频数据分配内存 lpData=new char[m_dwDataSize]; if(!lpData) { //faile } if(mmioSeek(m_hmmio,SoundOffset,SEEK_SET)<0) { //Failed to read the data chunk } m_WaveLong=mmioRead(m_hmmio,lpData,SoundLong); if(m_WaveLong<0) { //Failed to read the data chunk } //检查音频设备，返回音频输出设备的性能 if(waveOutGetDeVCaps(WAVE_MAPPER,&pwoc,sizeof(WAVEOUTCAPS))!=0) { //Unable to allocate or lock memory } //检查音频输出设备是否能播放指定的音频文件 if(waveOutOpen(&hWaveOut,DevsNum,lpFormat,NULL,NULL,CALLBACK_NULL)!=0) { //Failed to OPEN the wave out devices } //准备待播放的数据 pWaveOutHdr.lpData =(HPSTR)lpData; pWaveOutHdr.dwBufferLength =m_WaveLong; pWaveOutHdr.dwFlags =0; if(waveOutPrepareHeader(hWaveOut,&pWaveOutHdr,sizeof(WAVEHDR))!=0) { //Failed to prepare the wave data buffer } //播放音频数据文件 if(waveOutWrite(hWaveOut,&pWaveOutHdr,sizeof(WAVEHDR))!=0) { //Failed to write the wave data buffer } //关闭音频输出设备,释放内存 waveOutReset(hWaveOut); waveOutClose(hWaveOut); LocalUnlock(m_hFormat); LocalFree(m_hFormat); delete [] lpData;