D:/work/code_by/Wave/WavePlayer.h

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#ifndef _WAVEPLAYER_H_
#define _WAVEPLAYER_H_

#include <system.hpp>
#include <mmsystem.h>
#include "Speaker.h"
#include "HiddenWindow.h"
#include "WaveFile.h"

class TWavePlayer;

class TWavePlayerWindow : public THiddenWindow
{
protected:
  TWavePlayer *WavePlayer;
public:
  TWavePlayerWindow(TWavePlayer *);
  void WndProc(UINT, WPARAM, LPARAM);
};

class TWavePlayer : public TWaveFile, public Speaker
{
friend TWavePlayerWindow;
protected:
  WAVEFORMATEX waveFormat;
  HWAVEIN waveIn;
  HWAVEOUT waveOut;
  WAVEHDR waveInHdr[3], waveOutHdr[3];
  int bufferSize, bufferTotal, recordBufferCount, playBufferCount, firstEchoBufferIndex;
  int mode, bytesPerBuffer;
  float duration;
  TWavePlayerWindow *HiddenWindow;
  bool echoOn, firstEcho;

  void Resample(int);
  bool OpenRecordDevice(void);
  void CloseRecordDevice(void);
  bool OpenPlayDevice(void);
  void ClosePlayDevice(void);
  void RecordComplete(void);
  void PlayComplete(void);
public:
  enum
  {
    EVENT_RECORD_BUFFER,
    EVENT_PLAY_BUFFER,
    EVENT_RECORD_COMPLETE,
    EVENT_PLAY_COMPLETE
  };

  enum
  {
    IDLE,
    RECORDING,
    PLAYING
  };

  int *wave;
  int waveSize;
  int echoVolume;

  TWavePlayer(int sampleRate = 11025, int bitRate = 8);
  ~TWavePlayer();
  int GetMode(void);    

  int GetSampleRate(void);      

  int GetBitRate(void); 

  void SetFormat(int newSampleRate, int newBitRate);
  float GetDuration(void);
  bool IsEchoOn(void);  

  int GetBufferSize(void);      

  void SetBufferSize(int);
  void SetWave(int *w, int size);
  void SetWave(TWaveFile *WaveFile);
  bool Record(int maxDuration);
  void StopRecord(void);        

  bool Play(void);
  void StopPlay(void);  

  void EchoOn(void);    

  void EchoOff(void);   

  float GetTimeCode(void);      

  void Seek(int percent);
  /*
   * 設定錄音的監聽元件。當錄音完畢時，會送一個message給handle。
   * @param handle 監聽元件的handle。
   * @param message 監聽元件會收到的message。
   */
  bool Load(char *name);
  bool Save(char *name);        

  void Clear(void);     

  void Trim(int from, int to);  

  void RecordABuffer(void);
  void PlayABuffer(void);
};

#endif

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