//此段代碼引自 Eugene Olafsen(美)等著'MFC Programming with Visual C++ 6 Unleashed'
//May.8
//-----------------------------------------------------------------
// MMIO Objects
// C++ Header - MMIO.h
//-----------------------------------------------------------------

#ifndef __MMIO_H__
#define __MMIO_H__

//-----------------------------------------------------------------
// Inclusions
//-----------------------------------------------------------------
#include <MMSystem.h>

//-----------------------------------------------------------------
// CMMChunk Class - Multimedia RIFF Chunk Object
//-----------------------------------------------------------------
class CMMChunk : public MMCKINFO
{
  // Protected Constructor(s)/Destructor
protected:
  CMMChunk() { };
};

//-----------------------------------------------------------------
// CMMIdChunk Class - Multimedia RIFF Id Chunk Object
//-----------------------------------------------------------------
class CMMIdChunk : public CMMChunk
{
  // Public Constructor(s)/Destructor
public:
  CMMIdChunk(char c0, char c1, char c2, char c3);
  CMMIdChunk(LPCSTR psz, UINT uiFlags = 0u);
};

//-----------------------------------------------------------------
// CMMTypeChunk Class - Multimedia RIFF Type Chunk Object
//-----------------------------------------------------------------
class CMMTypeChunk : public CMMChunk
{
  // Public Constructor(s)/Destructor
public:
  CMMTypeChunk(char c0, char c1, char c2, char c3);
  CMMTypeChunk(LPCSTR psz, UINT uiFlags = 0u);
};

//-----------------------------------------------------------------
// CMMIOInfo Class - Multimedia RIFF I/O Info Object
//-----------------------------------------------------------------
class CMMIOInfo : public MMIOINFO
{
  // Public Constructor(s)/Destructor
public:
  CMMIOInfo();
};

//-----------------------------------------------------------------
// CMMMemoryIOInfo Class - Multimedia RIFF Memory I/O Info Object
//-----------------------------------------------------------------
class CMMMemoryIOInfo : public CMMIOInfo
{
  // Public Constructor(s)/Destructor
public:
  CMMMemoryIOInfo(LONG lBuffer, DWORD dwMinExpansion = 0);
  CMMMemoryIOInfo(HPSTR pBuffer, LONG lBuffer, DWORD
    dwMinExpansion = 0);
};

//-----------------------------------------------------------------
// CMMIO Class - Multimedia RIFF I/O Object
//-----------------------------------------------------------------
class CMMIO : public CObject
{
  // Public Constructor(s)/Destructor
public:
            CMMIO();
            CMMIO(HMMIO hmmio);
            CMMIO(const char* pszFileName, DWORD dwOpenFlag =
              MMIO_READ);
            CMMIO(CMMMemoryIOInfo& mmioinfo);

  // Public Methods
public:
  void      Open(const char* pszFileName, DWORD dwOpenFlags =
              MMIO_READ);
  void      Open(CMMMemoryIOInfo &mmioinfo);
  MMRESULT  Close(UINT uiFlags = 0u);

  MMRESULT  Ascend(CMMChunk &mmckInfo, UINT uiFlags = 0u);
  MMRESULT  Descend(CMMChunk &mmckInfo, UINT uiFlags = 0u);
  MMRESULT  Descend(CMMChunk &mmckInfo, CMMChunk &mmckParent, UINT
              uiFlags = 0u);

  LONG      Read(HPSTR pData, LONG lLen);
  LONG      Write(const char* pData, LONG lLen);
	LONG      Seek(LONG lOffset, int iOrigin);

  LRESULT   SendMessage(UINT uiMsg, LPARAM lParam1, LPARAM
              lParam2);
  MMRESULT  SetBuffer(LPSTR pBuffer, LONG lBuffer, UINT uiFlags
              = 0u);

  MMRESULT  GetInfo(CMMIOInfo &, UINT uiFlags = 0);
  MMRESULT  SetInfo(CMMIOInfo &, UINT uiFlags = 0);
  MMRESULT  Advance(CMMIOInfo &, UINT uiFlags);

  // Public Data
public:
  HMMIO m_hmmio;
};


//-----------------------------------------------------------------
// CMMIdChunk Inline Public Constructor(s)/Destructor
//-----------------------------------------------------------------
inline
CMMIdChunk::CMMIdChunk(char c0, char c1, char c2, char c3)
{
  ckid = mmioFOURCC(c0, c1, c2, c3);
}

inline
CMMIdChunk::CMMIdChunk(LPCSTR psz, UINT uiFlags)
{
  ckid = ::mmioStringToFOURCC(psz, uiFlags);
}

//-----------------------------------------------------------------
// CMMTypeChunk Inline Public Constructor(s)/Destructor
//-----------------------------------------------------------------
inline
CMMTypeChunk::CMMTypeChunk(char c0, char c1, char c2, char c3)
{
  fccType = mmioFOURCC(c0, c1, c2, c3);
}

inline
CMMTypeChunk::CMMTypeChunk(LPCSTR psz, UINT uiFlags)
{
  fccType = ::mmioStringToFOURCC(psz, uiFlags);
}

//-----------------------------------------------------------------
// CMMIOInfo Inline Public Constructor(s)/Destructor
//-----------------------------------------------------------------
inline
CMMIOInfo::CMMIOInfo()
{
  ::ZeroMemory(this, sizeof(MMIOINFO));
}

//-----------------------------------------------------------------
// CMMMemoryIOInfo Inline Public Constructor(s)/Destructor
//-----------------------------------------------------------------
inline
CMMMemoryIOInfo::CMMMemoryIOInfo(LONG lBuffer, DWORD
  dwMinExpansion)
{
  pIOProc = NULL;
  fccIOProc = FOURCC_MEM;
  pchBuffer = NULL;
  cchBuffer = lBuffer;
  adwInfo[0] = dwMinExpansion;
}

inline
CMMMemoryIOInfo::CMMMemoryIOInfo(HPSTR pBuffer, LONG cchBuf, DWORD
  dwMinExpansion)
{
  pIOProc = NULL;
  fccIOProc = FOURCC_MEM;
  pchBuffer = pBuffer;
  cchBuffer = cchBuf;
  adwInfo[0] = dwMinExpansion;
}

//-----------------------------------------------------------------
// CMMIO Inline Public Constructor(s)/Destructor
//-----------------------------------------------------------------
inline
CMMIO::CMMIO()
  : m_hmmio(NULL)
{
}

inline
CMMIO::CMMIO(HMMIO hmmio)
  : m_hmmio(hmmio)
{
}

inline
CMMIO::CMMIO(const char* pszFileName, DWORD dwOpenFlag)
{
  Open(pszFileName, dwOpenFlag);
}

inline
CMMIO::CMMIO(CMMMemoryIOInfo &mmioinfo)
{
  Open(mmioinfo);
}

//-----------------------------------------------------------------
// CMMIO Inline Public Methods
//-----------------------------------------------------------------
inline MMRESULT
CMMIO::Close(UINT uiFlags)
{
  ASSERT(m_hmmio != NULL);
  MMRESULT mmr = ::mmioClose(m_hmmio, uiFlags);  
  m_hmmio = NULL;
  return mmr;
}

inline LONG
CMMIO::Read(HPSTR pData, LONG lLen)
{
  ASSERT(m_hmmio != NULL);
  return ::mmioRead(m_hmmio, pData, lLen);
}

inline MMRESULT
CMMIO::Ascend(CMMChunk &mmckInfo, UINT uiFlags)
{
  ASSERT(m_hmmio != NULL);
  return ::mmioAscend(m_hmmio, &mmckInfo, uiFlags);
}

inline MMRESULT
CMMIO::Descend(CMMChunk &mmckInfo, UINT uiFlags)
{
  ASSERT(m_hmmio != NULL);
  return ::mmioDescend(m_hmmio, &mmckInfo, 0, uiFlags);
}

inline MMRESULT
CMMIO::Descend(CMMChunk &mmckInfo, CMMChunk &mmckParent, UINT
  uiFlags)
{
  ASSERT(m_hmmio != NULL);
  return ::mmioDescend(m_hmmio, &mmckInfo, &mmckParent, uiFlags);
}

inline LONG
CMMIO::Seek(LONG lOffset, int iOrigin)
{
  ASSERT(m_hmmio != NULL);
  return ::mmioSeek(m_hmmio, lOffset, iOrigin);
}

inline LRESULT
CMMIO::SendMessage(UINT uiMsg, LPARAM lParam1, LPARAM lParam2)
{
  ASSERT(m_hmmio != NULL);
  return ::mmioSendMessage(m_hmmio, uiMsg, lParam1, lParam2);
}

inline MMRESULT
CMMIO::SetBuffer(LPSTR pBuffer, LONG lBuffer, UINT uiFlags)
{
  ASSERT(m_hmmio != NULL);
  return ::mmioSetBuffer(m_hmmio, pBuffer, lBuffer, uiFlags);  
}

inline LONG
CMMIO::Write(const char* pData, LONG lLen)
{
  ASSERT(m_hmmio != NULL);
  return ::mmioWrite(m_hmmio, pData, lLen);
}

inline MMRESULT
CMMIO::GetInfo(CMMIOInfo &Info, UINT uiFlags)
{
  ASSERT(m_hmmio != NULL);
  return ::mmioGetInfo(m_hmmio, &Info, uiFlags);
}

inline MMRESULT
CMMIO::SetInfo(CMMIOInfo &Info, UINT uiFlags)
{
  ASSERT(m_hmmio != NULL);
  return ::mmioSetInfo(m_hmmio, &Info, uiFlags);
}

inline MMRESULT
CMMIO::Advance(CMMIOInfo &Info, UINT uiFlags)
{
  ASSERT(m_hmmio != NULL);
  return ::mmioAdvance(m_hmmio, &Info, uiFlags);
}

#endif