110 lines
2.3 KiB
C++
110 lines
2.3 KiB
C++
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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/*
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QM DSP Library
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Centre for Digital Music, Queen Mary, University of London.
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This file 2005-2006 Christian Landone.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version. See the file
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COPYING included with this distribution for more information.
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*/
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#include "Framer.h"
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#include <math.h>
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//////////////////////////////////////////////////////////////////////
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// Construction/Destruction
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//////////////////////////////////////////////////////////////////////
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Framer::Framer()
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{
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m_dataFrame = NULL;
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m_strideFrame = NULL;
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}
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Framer::~Framer()
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{
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if( m_dataFrame != NULL )
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delete [] m_dataFrame;
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if( m_strideFrame != NULL )
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delete [] m_strideFrame;
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}
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void Framer::configure( unsigned int frameLength, unsigned int hop )
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{
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m_frameLength = frameLength;
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m_stepSize = hop;
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resetCounters();
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if( m_dataFrame != NULL )
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{
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delete [] m_dataFrame;
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m_dataFrame = NULL;
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}
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m_dataFrame = new double[ m_frameLength ];
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if( m_strideFrame != NULL )
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{
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delete [] m_strideFrame;
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m_strideFrame = NULL;
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}
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m_strideFrame = new double[ m_stepSize ];
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}
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void Framer::getFrame(double *dst)
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{
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if( (m_ulSrcIndex + ( m_frameLength) ) < m_ulSampleLen )
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{
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for( unsigned int u = 0; u < m_frameLength; u++)
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{
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dst[ u ] = m_srcBuffer[ m_ulSrcIndex++ ];
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}
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m_ulSrcIndex -= ( m_frameLength - m_stepSize );
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}
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else
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{
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unsigned int rem = (m_ulSampleLen - m_ulSrcIndex );
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unsigned int zero = m_frameLength - rem;
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for( unsigned int u = 0; u < rem; u++ )
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{
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dst[ u ] = m_srcBuffer[ m_ulSrcIndex++ ];
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}
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for( unsigned int u = 0; u < zero; u++ )
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{
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dst[ rem + u ] = 0;
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}
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m_ulSrcIndex -= (( rem - m_stepSize ) );
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}
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m_framesRead++;
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}
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void Framer::resetCounters()
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{
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m_framesRead = 0;
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m_ulSrcIndex = 0;
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}
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unsigned int Framer::getMaxNoFrames()
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{
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return m_maxFrames;
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}
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void Framer::setSource(double *src, unsigned int length)
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{
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m_srcBuffer = src;
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m_ulSampleLen = length;
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m_maxFrames = (unsigned int)ceil( (double)m_ulSampleLen/(double)m_stepSize ) ;
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}
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