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/*
* $Id$
*
* ***** 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/intern/AUD_ChannelMapperReader.cpp
* \ingroup audaspaceintern
*/
#include "AUD_ChannelMapperReader.h"
AUD_ChannelMapperReader::AUD_ChannelMapperReader(AUD_IReader* reader,
float **mapping) :
AUD_EffectReader(reader)
{
m_specs = reader->getSpecs();
int channels = -1;
m_rch = m_specs.channels;
while(mapping[++channels] != 0);
m_mapping = new float*[channels];
m_specs.channels = (AUD_Channels)channels;
float sum;
int i;
while(channels--)
{
m_mapping[channels] = new float[m_rch];
sum = 0.0f;
for(i=0; i < m_rch; i++)
sum += mapping[channels][i];
for(i=0; i < m_rch; i++)
m_mapping[channels][i] = sum > 0.0f ?
mapping[channels][i]/sum : 0.0f;
}
}
AUD_ChannelMapperReader::~AUD_ChannelMapperReader()
{
int channels = m_specs.channels;
while(channels--)
{
delete[] m_mapping[channels];
}
delete[] m_mapping;
}
AUD_Specs AUD_ChannelMapperReader::getSpecs() const
{
return m_specs;
}
void AUD_ChannelMapperReader::read(int & length, sample_t* & buffer)
{
sample_t* in = buffer;
m_reader->read(length, in);
if(m_buffer.getSize() < length * AUD_SAMPLE_SIZE(m_specs))
m_buffer.resize(length * AUD_SAMPLE_SIZE(m_specs));
buffer = m_buffer.getBuffer();
sample_t sum;
for(int i = 0; i < length; i++)
{
for(int j = 0; j < m_specs.channels; j++)
{
sum = 0;
for(int k = 0; k < m_rch; k++)
sum += m_mapping[j][k] * in[i * m_rch + k];
buffer[i * m_specs.channels + j] = sum;
}
}
}
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