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