openalbuffer.cpp

游戏音频程序设计-Beginning.Game.Audio.Programming

// OpenALBuffer.cpp: implementation of the COpenALBuffer class.
//
//////////////////////////////////////////////////////////////////////

#pragma warning(disable: 4786)
#include <sstream>

#ifdef WIN32
#include <windows.h>
#endif

using namespace std;

#include "OpenALBuffer.h"
#include "ErrorHandling.h"

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

namespace AudioEngine {

COpenALBuffer::COpenALBuffer()
{
  m_ID = -1;
}

COpenALBuffer::~COpenALBuffer()
{
  try {
    if (alIsBuffer(m_ID) == AL_TRUE) alDeleteBuffers(1, &m_ID);
  } catch(...) { }
}

void COpenALBuffer::LoadWave(std::string filename)
{
  unsigned char *data = NULL;

  alutLoadWAVFile(const_cast<char *>(filename.c_str()), &m_Format, (void **)&data, &m_Size, &m_Freq, &m_Loop);

  // copy wave data into buffer
  alBufferData(m_ID, m_Format, data, m_Size, m_Freq);
  if (alGetError() != AL_NO_ERROR) {
    alutUnloadWAV(m_Format, data, m_Size, m_Freq);
    Throw("COpenALBuffer::LoadWave: error loading WAV data into buffer.");
  }

  // free original data
  alutUnloadWAV(m_Format, data, m_Size, m_Freq);
}

COpenALBufferPtr::COpenALBufferPtr(COpenALBuffer* p) : CRefCountPtr<COpenALBuffer>(p) 
{ 
#ifdef WIN32
  stringstream str;
  if (p) {
    str << "COpenALBufferPtr::COpenALBufferPtr: constructed for pointer " << p 
      << " (count = " << itsCounter->count << ")..." << endl;
    OutputDebugString(str.str().c_str());
  }
#endif
}

void COpenALBufferPtr::Release()
{
#ifdef WIN32
  stringstream str;
  if (itsCounter) {
    str << "COpenALBufferPtr::Release(): pointer " << itsCounter->ptr
      << " (count = " << itsCounter->count << ")..." << endl;
    OutputDebugString(str.str().c_str());
  }
#endif
}

} // namespace