#include "stdafx.h"
  #include "DirectSound.h"
  #ifndef DSBLOCK_ENTIREBUFFER
  #define DSBLOCK_ENTIREBUFFER 0x00000002
  #endif
  #ifdef _DEBUG
  #undef THIS_FILE
  static char THIS_FILE[]=__FILE__;
  #define new DEBUG_NEW
  #endif
  BOOL CDirectSound::CreateSoundBuffer(WAVEFORMATEX*pcmwf){DSBUFFERDESC dsbdesc;
  memset(&dsbdesc,0,sizeof(DSBUFFERDESC));dsbdesc.dwSize=sizeof(DSBUFFERDESC);
  dsbdesc.dwFlags=DSBCAPS_STATIC;dsbdesc.dwBufferBytes=m_dwTheSound;
  dsbdesc.lpwfxFormat=pcmwf;HRESULT hRes;if(DS_OK!=(hRes=m_lpDirectSound->
  CreateSoundBuffer(&dsbdesc,&m_pDsb,0))){DSError(hRes);m_pDsb=0;return FALSE;}
  return TRUE;}BOOL CDirectSound::SetSoundData(void*pSoundData,DWORD dwSoundSize)
  {LPVOID lpvPtr1;DWORD dwBytes1;HRESULT hr=m_pDsb->Lock(0,0,&lpvPtr1,&dwBytes1,0
  ,0,DSBLOCK_ENTIREBUFFER);if(DSERR_BUFFERLOST==hr){m_pDsb->Restore();hr=m_pDsb->
  Lock(0,0,&lpvPtr1,&dwBytes1,0,0,DSBLOCK_ENTIREBUFFER);}if(DS_OK==hr){::
  CopyMemory(lpvPtr1,pSoundData,dwBytes1);hr=m_pDsb->Unlock(lpvPtr1,dwBytes1,0,0)
  ;if(DS_OK==hr)return TRUE;}return FALSE;}void CDirectSound::Play(DWORD
  dwStartPosition,BOOL bLoop){if(!IsValid()||!IsEnabled())return;if(
  dwStartPosition>m_dwTheSound)dwStartPosition=m_dwTheSound;m_pDsb->
  SetCurrentPosition(dwStartPosition);if(DSERR_BUFFERLOST==m_pDsb->Play(0,0,bLoop
  ?DSBPLAY_LOOPING:0)){SetSoundData(m_pTheSound,m_dwTheSound);m_pDsb->Play(0,0,
  bLoop?DSBPLAY_LOOPING:0);}}void CDirectSound::Stop(){if(IsValid())m_pDsb->Stop(
  );}void CDirectSound::Pause(){Stop();}void CDirectSound::Continue(){if(IsValid(
  )){DWORD dwPlayCursor,dwWriteCursor;m_pDsb->GetCurrentPosition(&dwPlayCursor,&
  dwWriteCursor);Play(dwPlayCursor);}}BOOL CDirectSound::IsValid()const{return(
  m_lpDirectSound&&m_pDsb&&m_pTheSound&&m_dwTheSound)?TRUE:FALSE;}