wavread.h

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//-----------------------------------------------------------------------------
// File: WavRead.h
//
// Desc: Support for loading and playing Wave files using DirectSound sound
//       buffers.
//
// Copyright (c) 1999 Microsoft Corp. All rights reserved.
//-----------------------------------------------------------------------------
#ifndef WAVE_READ_H
#define WAVE_READ_H


//#include "mmreg.h"
#include "mmsystem.h"


//-----------------------------------------------------------------------------
// Name: class CWaveSoundRead
// Desc: A class to read in sound data from a Wave file
//-----------------------------------------------------------------------------
class CWaveSoundRead
{
public:
    WAVEFORMATEX* m_pwfx;        // Pointer to WAVEFORMATEX structure
    HMMIO         m_hmmioIn;     // MM I/O handle for the WAVE
    MMCKINFO      m_ckIn;        // Multimedia RIFF chunk
    MMCKINFO      m_ckInRiff;    // Use in opening a WAVE file

public:
    CWaveSoundRead();
    ~CWaveSoundRead();

    HRESULT Open( CHAR* strFilename );
    HRESULT Reset();
    HRESULT Read( UINT nSizeToRead, BYTE* pbData, UINT* pnSizeRead );
    HRESULT Close();
private:
	HRESULT ReadMMIO( HMMIO hmmioIn, MMCKINFO* pckInRIFF, WAVEFORMATEX** ppwfxInfo );
	HRESULT WaveOpenFile( CHAR* strFileName, HMMIO* phmmioIn, WAVEFORMATEX** ppwfxInfo,
                  MMCKINFO* pckInRIFF );
	HRESULT WaveReadFile( HMMIO hmmioIn, UINT cbRead, BYTE* pbDest,
		MMCKINFO* pckIn, UINT* cbActualRead );
	HRESULT WaveStartDataRead( HMMIO* phmmioIn, MMCKINFO* pckIn,
		MMCKINFO* pckInRIFF );


};


#endif WAVE_READ_H