audacity/src/import/MultiFormatReader.h

/**********************************************************************

  Audacity: A Digital Audio Editor

  MultiFormatReader.h

  Philipp Sibler

**********************************************************************/

#ifndef __AUDACITY_MULTIFORMATREADER_H__
#define __AUDACITY_MULTIFORMATREADER_H__

#include <stdio.h>
#include <stdint.h>

class MachineEndianness
{
public:
   typedef enum
   {
      Little = 0,
      Big
   } EndiannessT;

   MachineEndianness();
   ~MachineEndianness()
   {}

   int IsLittle()
   {
      return (mFlag == MachineEndianness::Little) ? 1 : 0;
   }

   int IsBig()
   {
      return (mFlag == MachineEndianness::Big) ? 1 : 0;
   }
   
   EndiannessT Which()
   {
      return mFlag;
   }

private:
    EndiannessT mFlag;
};

class MultiFormatReader
{
   FILE* mpFid;   
   MachineEndianness mEnd;
   uint8_t mSwapBuffer[8];

public:
   typedef enum
   {
      Int8 = 0,
      Int16,
      Int32,
      Uint8,
      Uint16,
      Uint32,
      Float,
      Double
   } FormatT;
   
   MultiFormatReader(const char* filename);
   ~MultiFormatReader();

   void Reset();
   size_t ReadSamples(void* buffer, size_t len,
                    MultiFormatReader::FormatT format,
                    MachineEndianness::EndiannessT end);
   size_t ReadSamples(void* buffer, size_t len, size_t stride,
                    MultiFormatReader::FormatT format,
                    MachineEndianness::EndiannessT end);
   
private:
   size_t Read(void* buffer, size_t size, size_t len, size_t stride);
   void SwapBytes(void* buffer, size_t size, size_t len);
};

#endif