应shenqiren朋友的要求，我贴一段我自己播放OGG音乐的代码。
我的代码没经过仔细的设计，写的也很随意，希望大家帮我修正一下。
（写的时候参考了粘土游戏库的代码）。

头文件:

#include <dsound.h> #include <assert.h> #include <math.h> #include <ogg/ogg.h> #include <vorbis/codec.h> #include <vorbis/vorbisfile.h> #include <mmsystem.h> #pragma comment(lib,"dsound.lib") #pragma comment(lib,"dxguid.lib") #pragma comment(lib,"winmm.lib") class ljmMusicBuffer_DSound : public ljmMusicBuffer { public: ljmMusicBuffer_DSound(IDirectSound8* pDS); ~ljmMusicBuffer_DSound(); bool LoadOggFile(const char* szFileName); void Play(bool bLoop); void Stop(void); void Pause(void); void Reset(void); void SetVolume(float vol); bool IsPlaying(void); protected: LPDIRECTSOUND8        m_pDS; LPDIRECTSOUNDBUFFER    m_pBuffer; LONG                   m_lVolume; WAVEFORMATEX           m_wfx; DWORD                  m_dwWritePos; OggVorbis_File* m_pVorbisFile; string m_strCurFile; bool m_bMono ; long m_lRate; int  current_section; bool m_bLoop; bool m_bFinished; // static const int BUFFERSIZE = 8192; UINT m_TimerID; void Clear(void); void FillBuffer(void); static void CALLBACK OnTimerCB(UINT uID, UINT uMsg,DWORD_PTR pUserData, DWORD_PTR dwParam1, DWORD_PTR dwParam2); };

函数体

ljmMusicBuffer_DSound::ljmMusicBuffer_DSound(IDirectSound8* pDS) :m_pDS(pDS) ,m_pBuffer(NULL) ,m_TimerID(0) ,m_pVorbisFile(NULL) ,m_bLoop(false) ,m_bFinished(false) { } ljmMusicBuffer_DSound::~ljmMusicBuffer_DSound() { Stop(); Clear(); } void ljmMusicBuffer_DSound::Play(bool bLoop) { if(!m_pBuffer) return; m_bLoop = bLoop; if(IsPlaying()) Stop(); m_dwWritePos = 0; FillBuffer(); FillBuffer(); m_pBuffer->Play(0,0,DSBPLAY_LOOPING); m_bFinished = false; m_TimerID = timeSetEvent(500,0,OnTimerCB,(DWORD_PTR)this,TIME_PERIODIC); } void ljmMusicBuffer_DSound::Stop(void) { timeKillEvent(m_TimerID); Reset(); m_bFinished = true; } void ljmMusicBuffer_DSound::Pause(void) { m_pBuffer->Stop(); } void ljmMusicBuffer_DSound::Reset(void) { if(!m_pBuffer) return; m_pBuffer->Stop(); m_pBuffer->SetCurrentPosition(0); m_dwWritePos = 0; if(m_pVorbisFile) ov_pcm_seek(m_pVorbisFile,0); } void ljmMusicBuffer_DSound::SetVolume(float vol) { //vol 为 0.0f~1.0f , DSound的单位是分贝 if (vol > 0) { m_lVolume = (LONG)(log10(vol) * 2000.0f); } else { m_lVolume = -10000; } if(!m_pBuffer) return; m_pBuffer->SetVolume((LONG)vol); } bool ljmMusicBuffer_DSound::IsPlaying(void) { DWORD dwStatus; if(!m_pBuffer) return false; m_pBuffer->GetStatus(&dwStatus); return (dwStatus & DSBSTATUS_PLAYING); } void ljmMusicBuffer_DSound::Clear(void) { SAFE_RELEASE(m_pBuffer); if(m_pVorbisFile) { ov_clear(m_pVorbisFile); delete m_pVorbisFile; m_pVorbisFile = NULL; } }

bool ljmMusicBuffer_DSound::LoadOggFile(const char* szFileName)
{
Stop();
Clear();
if(m_strCurFile == szFileName)
return true;

FILE* pFile = fopen(szFileName,"rb");
if(!pFile)
return false;

if(m_pVorbisFile)
{
ov_clear(m_pVorbisFile);
delete m_pVorbisFile;
}
m_pVorbisFile = new OggVorbis_File;
memset(m_pVorbisFile,0,sizeof(OggVorbis_File));
ov_clear(m_pVorbisFile);

if( 0!=ov_open(pFile,m_pVorbisFile,NULL,0) )
{
ov_clear(m_pVorbisFile);
delete m_pVorbisFile;
return false;
}

if(m_pVorbisFile->vi->channels == 1)
{
m_bMono = true;
}
else
{
m_bMono = false;
}

m_lRate = m_pVorbisFile->vi->rate;

// WAVEFORMATEX wfx;

m_wfx.wFormatTag     = WAVE_FORMAT_PCM;
m_wfx.nSamplesPerSec = (DWORD)m_lRate;
m_wfx.wBitsPerSample = 16;
m_wfx.cbSize  = sizeof(WAVEFORMATEX);

if(m_bMono)
{
m_wfx.nChannels = 1;
}
else
{
m_wfx.nChannels = 2;
}

m_wfx.nBlockAlign = m_wfx.nChannels * m_wfx.wBitsPerSample / 8;
m_wfx.nAvgBytesPerSec = m_wfx.nSamplesPerSec * m_wfx.nBlockAlign;

DSBUFFERDESC dsbd;
ZeroMemory(&dsbd,sizeof(DSBUFFERDESC));
dsbd.dwSize          = sizeof(dsbd);
dsbd.dwFlags         = 0;//DSBCAPS_CTRLVOLUME;
dsbd.dwBufferBytes   = m_wfx.nAvgBytesPerSec * 2; dsbd.guid3DAlgorithm = GUID_NULL;
dsbd.lpwfxFormat     = &m_wfx;

HRESULT hr;
if(FAILED( hr = m_pDS->CreateSoundBuffer(&dsbd,&m_pBuffer,NULL)))
{
ov_clear(m_pVorbisFile);
delete m_pVorbisFile;
return false;
}

return true;
}

1. <p></p><p>void&nbsp;ljmMusicBuffer_DSound::FillBuffer(void)<br/>{</p><p>HRESULT&nbsp;hr;<br/>VOID*&nbsp;&nbsp;&nbsp;pDSLockedBuffer&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=&nbsp;NULL;&nbsp;//&nbsp;Pointer&nbsp;to&nbsp;locked&nbsp;buffer&nbsp;memory<br/>DWORD&nbsp;&nbsp;&nbsp;dwDSLockedBufferSize&nbsp;=&nbsp;0;&nbsp;&nbsp;&nbsp;&nbsp;//&nbsp;Size&nbsp;of&nbsp;the&nbsp;locked&nbsp;DirectSound&nbsp;buffer<br/>DWORD&nbsp;&nbsp;&nbsp;dwWavDataRead&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=&nbsp;0;&nbsp;&nbsp;&nbsp;&nbsp;//&nbsp;Amount&nbsp;of&nbsp;data&nbsp;read&nbsp;from&nbsp;the&nbsp;wav&nbsp;file</p><p>LPDIRECTSOUNDBUFFER&nbsp;pDSB&nbsp;=&nbsp;m_pBuffer;<br/>BOOL&nbsp;bRepeatWavIfBufferLarger&nbsp;=&nbsp;FALSE;<br/></p><p>if(&nbsp;pDSB&nbsp;==&nbsp;NULL&nbsp;)<br/>return&nbsp;;</p><p>//&nbsp;Make&nbsp;sure&nbsp;we&nbsp;have&nbsp;focus,&nbsp;and&nbsp;we&nbsp;didn't&nbsp;just&nbsp;switch&nbsp;in&nbsp;from<br/>//&nbsp;an&nbsp;app&nbsp;which&nbsp;had&nbsp;a&nbsp;DirectSound&nbsp;device<br/>//if(&nbsp;FAILED(&nbsp;hr&nbsp;=&nbsp;RestoreBuffer(&nbsp;pDSB,&nbsp;NULL&nbsp;)&nbsp;)&nbsp;)<br/>// return&nbsp;hr;</p><p><br/>// int&nbsp;&nbsp;buffer_size;<br/>long&nbsp;bytes_read;<br/></p><p>size_t&nbsp;length&nbsp;=&nbsp;m_wfx.nAvgBytesPerSec&nbsp;/&nbsp;2;&nbsp;</p><p>char*&nbsp;buffer&nbsp;=&nbsp;new&nbsp;char[length];<br/><br/>long&nbsp;leave&nbsp;=&nbsp;(long)length;<br/>long&nbsp;cur_pos&nbsp;=&nbsp;0;</p><p></p><p>do<br/>{<br/>bytes_read&nbsp;=&nbsp;ov_read(m_pVorbisFile,&nbsp;<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;buffer+cur_pos,<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(int)leave,0/*endian*/,<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2/*16-bit*/,1/*signed*/,<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&amp;current_section);<br/>leave&nbsp;&nbsp;&nbsp;-=&nbsp;bytes_read;<br/>cur_pos&nbsp;+=&nbsp;bytes_read;<br/>if(bytes_read&lt;=0)<br/>break;<br/>}while(leave&gt;0);</p><p>bytes_read&nbsp;=&nbsp;cur_pos;<br/><br/>DWORD&nbsp;dwOffset&nbsp;=&nbsp;(DWORD)length&nbsp;*&nbsp;m_dwWritePos;</p><p><br/>//&nbsp;Lock&nbsp;the&nbsp;buffer&nbsp;down<br/>if(&nbsp;FAILED(&nbsp;hr&nbsp;=&nbsp;pDSB-&gt;Lock(&nbsp;dwOffset&nbsp;,&nbsp;(DWORD)length,<br/>&amp;pDSLockedBuffer,&nbsp;&amp;dwDSLockedBufferSize,<br/>NULL,&nbsp;NULL,&nbsp;0L&nbsp;)&nbsp;)&nbsp;)<br/>{<br/>delete&nbsp;buffer;<br/>return&nbsp;;<br/>}</p><p>memcpy(pDSLockedBuffer,buffer,(size_t)bytes_read);<br/>if((size_t)bytes_read&lt;length)<br/>{<br/>memset((char*)pDSLockedBuffer&nbsp;+&nbsp;bytes_read,0,<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;length-(size_t)bytes_read);<br/>if(m_bLoop)<br/>{<br/>ov_pcm_seek(m_pVorbisFile,0);<br/>}<br/>else<br/>{<br/>m_bFinished&nbsp;=&nbsp;true;<br/>}<br/>}</p><p><br/>m_dwWritePos++;<br/>m_dwWritePos&nbsp;%=&nbsp;4;</p><p><br/>//&nbsp;Unlock&nbsp;the&nbsp;buffer,&nbsp;we&nbsp;don't&nbsp;need&nbsp;it&nbsp;anymore.<br/>pDSB-&gt;Unlock(&nbsp;pDSLockedBuffer,&nbsp;dwDSLockedBufferSize,&nbsp;NULL,&nbsp;0&nbsp;);</p><p><br/>delete&nbsp;buffer;</p><p>}</p><p>

复制代码

void CALLBACK ljmMusicBuffer_DSound::OnTimerCB(
                                UINT uID, UINT uMsg,
                                DWORD_PTR pUserData,
                DWORD_PTR dwParam1, 
                                DWORD_PTR dwParam2)
{
ljmMusicBuffer_DSound* pObj = (ljmMusicBuffer_DSound*)pUserData;
if(pObj)
{
if(pObj->m_bFinished)
{
pObj->Stop();
}
else
{
pObj->FillBuffer();
}
}
}