AJ Kelly
83 lines
2.9 KiB
C++
83 lines
2.9 KiB
C++
/* RageSoundReader_SpeedChange - change the speed of an audio stream without changing its pitch. */
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#ifndef RAGE_SOUND_READER_SPEED_CHANGE_H
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#define RAGE_SOUND_READER_SPEED_CHANGE_H
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#include "RageSoundReader_Filter.h"
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class RageSoundReader_SpeedChange: public RageSoundReader_Filter
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{
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public:
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RageSoundReader_SpeedChange( RageSoundReader *pSource );
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virtual int SetPosition( int iFrame );
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virtual int Read( float *pBuf, int iFrames );
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virtual RageSoundReader_SpeedChange *Copy() const { return new RageSoundReader_SpeedChange(*this); }
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virtual bool SetProperty( const RString &sProperty, float fValue );
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virtual int GetNextSourceFrame() const;
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virtual float GetStreamToSourceRatio() const;
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void SetSpeedRatio( float fRatio );
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/* Return true if the next Read() will start a new block, allowing GetRatio() to
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* be updated to a new value. Used by RageSoundReader_PitchChange. */
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bool NextReadWillStep() const { return GetCursorAvail() == 0; }
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/* Get the ratio last set by SetSpeedRatio. */
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float GetRatio() const { return m_fSpeedRatio; }
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protected:
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int FillData( int iMax );
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void EraseData( int iToDelete );
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int Step();
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void Reset();
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int GetCursorAvail() const;
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int GetWindowSizeFrames() const;
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int GetToleranceFrames() const { return GetWindowSizeFrames() / 4; }
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int m_iDataBufferAvailFrames;
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struct ChannelInfo
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{
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vector<float> m_DataBuffer;
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int m_iCorrelatedPos;
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int m_iLastCorrelatedPos;
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};
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vector<ChannelInfo> m_Channels;
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int m_iUncorrelatedPos;
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int m_iPos;
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float m_fSpeedRatio;
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float m_fTrailingSpeedRatio;
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float m_fErrorFrames;
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};
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#endif
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/*
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* Copyright (c) 2006 Glenn Maynard
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, and/or sell copies of the Software, and to permit persons to
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* whom the Software is furnished to do so, provided that the above
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* copyright notice(s) and this permission notice appear in all copies of
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* the Software and that both the above copyright notice(s) and this
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* permission notice appear in supporting documentation.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
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* THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
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* INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
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* OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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