106 lines
2.6 KiB
C++
106 lines
2.6 KiB
C++
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* Copyright 2009-2011 Jörg Hermann Müller
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*
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* This file is part of AudaSpace.
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*
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* Audaspace is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* AudaSpace is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Audaspace; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file audaspace/FX/AUD_SuperposeReader.cpp
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* \ingroup audfx
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*/
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#include "AUD_SuperposeReader.h"
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#include <cstring>
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static const char* specs_error = "AUD_SuperposeReader: Both readers have to "
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"have the same specs.";
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AUD_SuperposeReader::AUD_SuperposeReader(boost::shared_ptr<AUD_IReader> reader1, boost::shared_ptr<AUD_IReader> reader2) :
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m_reader1(reader1), m_reader2(reader2)
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{
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}
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AUD_SuperposeReader::~AUD_SuperposeReader()
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{
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}
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bool AUD_SuperposeReader::isSeekable() const
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{
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return m_reader1->isSeekable() && m_reader2->isSeekable();
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}
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void AUD_SuperposeReader::seek(int position)
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{
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m_reader1->seek(position);
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m_reader2->seek(position);
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}
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int AUD_SuperposeReader::getLength() const
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{
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int len1 = m_reader1->getLength();
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int len2 = m_reader2->getLength();
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if((len1 < 0) || (len2 < 0))
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return -1;
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return AUD_MIN(len1, len2);
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}
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int AUD_SuperposeReader::getPosition() const
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{
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int pos1 = m_reader1->getPosition();
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int pos2 = m_reader2->getPosition();
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return AUD_MAX(pos1, pos2);
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}
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AUD_Specs AUD_SuperposeReader::getSpecs() const
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{
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return m_reader1->getSpecs();
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}
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void AUD_SuperposeReader::read(int& length, bool& eos, sample_t* buffer)
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{
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AUD_Specs specs = m_reader1->getSpecs();
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AUD_Specs s2 = m_reader2->getSpecs();
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if(!AUD_COMPARE_SPECS(specs, s2))
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AUD_THROW(AUD_ERROR_SPECS, specs_error);
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int samplesize = AUD_SAMPLE_SIZE(specs);
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m_buffer.assureSize(length * samplesize);
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int len1 = length;
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m_reader1->read(len1, eos, buffer);
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if(len1 < length)
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memset(buffer + len1 * specs.channels, 0, (length - len1) * samplesize);
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int len2 = length;
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bool eos2;
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sample_t* buf = m_buffer.getBuffer();
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m_reader2->read(len2, eos2, buf);
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for(int i = 0; i < len2 * specs.channels; i++)
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buffer[i] += buf[i];
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length = AUD_MAX(len1, len2);
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eos &= eos2;
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}
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