add RageSoundReader_Extend. This implements several RageSound
features (eg. fading, looping), but in a way that can be applied anywhere in a sound filter chain.
This commit is contained in:
Glenn Maynard
@@ -0,0 +1,194 @@
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#include "global.h"
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#include "RageSoundReader_Extend.h"
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#include "RageLog.h"
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#include "RageSoundUtil.h"
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#include "RageUtil.h"
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/*
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* Add support for negative seeks (adding a delay), extending a sound
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* beyond its end (m_LengthSeconds and M_CONTINUE), looping and fading.
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*/
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RageSoundReader_Extend::RageSoundReader_Extend( RageSoundReader *pSource ):
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RageSoundReader_Filter( pSource )
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{
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m_iPositionFrames = pSource->GetNextSourceFrame();
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m_StopMode = M_STOP;
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m_iStartFrames = 0;
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m_iLengthFrames = -1;
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m_iFadeFrames = 0;
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}
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int RageSoundReader_Extend::SetPosition( int iFrame )
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{
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m_iPositionFrames = iFrame;
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int iRet = m_pSource->SetPosition( max(iFrame, 0) );
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if( iRet < 0 )
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return iRet;
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if( m_iLengthFrames != -1 )
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return m_iPositionFrames < GetEndFrame();
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/* If we're in CONTINUE and we seek past the end of the file, don't return EOF. */
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if( m_StopMode == M_CONTINUE )
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return 1;
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return iRet;
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}
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int RageSoundReader_Extend::GetEndFrame() const
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{
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if( m_iLengthFrames == -1 )
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return -1;
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return m_iStartFrames + m_iLengthFrames;
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}
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int RageSoundReader_Extend::GetData( char *pBuffer, int iFrames )
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{
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int iFramesToRead = iFrames;
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if( m_iLengthFrames != -1 )
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iFramesToRead = min( iFramesToRead, GetEndFrame() - m_iPositionFrames );
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if( iFrames && !iFramesToRead )
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return RageSoundReader::END_OF_FILE;
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if( m_iPositionFrames < 0 )
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{
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iFramesToRead = min( iFramesToRead, -m_iPositionFrames );
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m_iPositionFrames += iFramesToRead;
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memset( pBuffer, 0, iFramesToRead * sizeof(int16_t) * this->GetNumChannels() );
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return iFramesToRead;
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}
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int iNewPositionFrames = m_pSource->GetNextSourceFrame();
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int iRet = RageSoundReader_Filter::Read( pBuffer, iFramesToRead );
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/* Update the position from the source. If the source is at EOF, skip this,
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* so we'll extrapolate in M_CONTINUE. */
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if( iRet != RageSoundReader::END_OF_FILE )
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m_iPositionFrames = iNewPositionFrames;
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return iRet;
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}
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int RageSoundReader_Extend::Read( char *pBuffer, int iFrames )
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{
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int iFramesRead = GetData( pBuffer, iFrames );
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if( iFramesRead == RageSoundReader::END_OF_FILE )
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{
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if( (m_iLengthFrames != -1 && m_iPositionFrames < GetEndFrame()) ||
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m_StopMode == M_CONTINUE )
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{
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iFramesRead = iFrames;
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if( m_StopMode != M_CONTINUE )
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iFramesRead = min( GetEndFrame() - m_iPositionFrames, iFramesRead );
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memset( pBuffer, 0, iFramesRead * sizeof(int16_t) * this->GetNumChannels() );
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}
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}
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if( iFramesRead > 0 )
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{
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/* We want to fade when there's m_FadeLength seconds left, but if
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* m_LengthFrames is -1, we don't know the length we're playing.
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* (m_LengthFrames is the length to play, not the length of the
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* source.) If we don't know the length, don't fade. */
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if( m_iFadeFrames != 0 && m_iLengthFrames != -1 )
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{
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const int iFinishFadingOutAt = GetEndFrame();
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const int iStartFadingOutAt = iFinishFadingOutAt - m_iFadeFrames;
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const int iStartSecond = m_iPositionFrames;
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const int iEndSecond = m_iPositionFrames + iFramesRead;
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const float fStartVolume = SCALE( iStartSecond, iStartFadingOutAt, iFinishFadingOutAt, 1.0f, 0.0f );
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const float fEndVolume = SCALE( iEndSecond, iStartFadingOutAt, iFinishFadingOutAt, 1.0f, 0.0f );
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RageSoundUtil::Fade( (int16_t *) pBuffer, iFramesRead, fStartVolume, fEndVolume );
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}
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m_iPositionFrames += iFramesRead;
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}
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if( iFramesRead == RageSoundReader::END_OF_FILE && m_StopMode == M_LOOP )
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{
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this->SetPosition( m_iStartFrames );
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return STREAM_LOOPED;
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}
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if( iFramesRead == RageSoundReader::ERROR )
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this->SetError( m_pSource->GetError() );
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return iFramesRead;
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}
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int RageSoundReader_Extend::GetNextSourceFrame() const
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{
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return m_iPositionFrames;
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}
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bool RageSoundReader_Extend::SetProperty( const RString &sProperty, float fValue )
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{
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if( sProperty == "StartSecond" )
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{
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m_iStartFrames = lrintf( fValue * this->GetSampleRate() );
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return true;
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}
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if( sProperty == "LengthSeconds" )
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{
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if( fValue == -1 )
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m_iLengthFrames = -1;
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else
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m_iLengthFrames = lrintf( fValue * this->GetSampleRate() );
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return true;
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}
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if( sProperty == "Loop" )
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{
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m_StopMode = M_LOOP;
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return true;
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}
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if( sProperty == "Stop" )
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{
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m_StopMode = M_STOP;
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return true;
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}
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if( sProperty == "Continue" )
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{
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m_StopMode = M_CONTINUE;
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return true;
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}
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if( sProperty == "FadeSeconds" )
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{
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m_iFadeFrames = lrintf( fValue * this->GetSampleRate() );
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return true;
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}
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return false;
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}
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/*
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* Copyright (c) 2003-2006 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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@@ -0,0 +1,58 @@
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/* RageSoundReader_Extend - Add looping, delay and truncation and fading. */
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#ifndef RAGE_SOUND_READER_EXTEND
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#define RAGE_SOUND_READER_EXTEND
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#include "RageSoundReader_Filter.h"
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class RageSoundReader_Extend: public RageSoundReader_Filter
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{
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public:
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RageSoundReader_Extend( RageSoundReader *pSource );
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virtual int SetPosition( int iFrame );
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virtual int Read( char *pBuffer, int iFrames );
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virtual int GetNextSourceFrame() const;
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virtual bool SetProperty( const RString &sProperty, float fValue );
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RageSoundReader_Extend *Copy() const { return new RageSoundReader_Extend(*this); }
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~RageSoundReader_Extend() { }
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private:
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int GetEndFrame() const;
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int GetData( char *pBuffer, int iFrames );
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int m_iPositionFrames;
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enum StopMode { M_LOOP, M_STOP, M_CONTINUE };
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StopMode m_StopMode;
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int m_iStartFrames;
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int m_iLengthFrames;
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int m_iFadeFrames;
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};
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#endif
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/*
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* Copyright (c) 2003-2006 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
|
||||
* PERFORMANCE OF THIS SOFTWARE.
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*/
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