soundtoucheffect.h

Audacity是一款用於錄音和編輯聲音的、免費的開放源碼軟體。它可以執行於Mac OS X、Microsoft Windows、GNU/Linux和其它作業系統

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

  Audacity: A Digital Audio Editor

  SoundTouchEffect.h

  Dominic Mazzoni, Vaughan Johnson

  This abstract class contains all of the common code for an
  effect that uses SoundTouch to do its processing (ChangeTempo
  and ChangePitch).

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

#if USE_SOUNDTOUCH

#ifndef __AUDACITY_EFFECT_SOUNDTOUCH__
#define __AUDACITY_EFFECT_SOUNDTOUCH__

#include "Effect.h"
#include "SoundTouch.h"

using namespace soundtouch;


class WaveTrack;

class EffectSoundTouch:public Effect {

 public:
   virtual bool Process();

 protected:
   SoundTouch *mSoundTouch;

 private:
   bool ProcessOne(WaveTrack * t,
                   longSampleCount start, longSampleCount end);
   bool ProcessStereo(WaveTrack* leftTrack, WaveTrack* rightTrack, 
                        longSampleCount start, longSampleCount end);
   bool ProcessStereoResults(const unsigned int outputCount, 
                              WaveTrack* outputLeftTrack, 
                              WaveTrack* outputRightTrack);

   int    mCurTrackNum;
   double mCurT0;
   double mCurT1;

	double m_maxNewLength;
};

#endif

#endif

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