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/*
Audio File Library
Copyright (C) 2010, Michael Pruett <michael@68k.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307 USA.
*/
#include "config.h"
#include "SimpleModule.h"
#include <algorithm>
void SimpleModule::runPull()
{
pull(m_outChunk->frameCount);
run(*m_inChunk, *m_outChunk);
}
void SimpleModule::runPush()
{
m_outChunk->frameCount = m_inChunk->frameCount;
run(*m_inChunk, *m_outChunk);
push(m_outChunk->frameCount);
}
ApplyChannelMatrix::ApplyChannelMatrix(FormatCode format, bool isReading,
int inChannels, int outChannels,
double minClip, double maxClip, const double *matrix) :
m_format(format),
m_inChannels(inChannels),
m_outChannels(outChannels),
m_minClip(minClip),
m_maxClip(maxClip),
m_matrix(NULL)
{
m_matrix = new double[m_inChannels * m_outChannels];
if (matrix)
{
if (isReading)
{
// Copy channel matrix for reading.
std::copy(matrix, matrix + m_inChannels * m_outChannels, m_matrix);
}
else
{
// Transpose channel matrix for writing.
for (int i=0; i < inChannels; i++)
for (int j=0; j < outChannels; j++)
m_matrix[j*inChannels + i] = matrix[i*outChannels + j];
}
}
else
{
initDefaultMatrix();
}
}
ApplyChannelMatrix::~ApplyChannelMatrix()
{
delete [] m_matrix;
}
const char *ApplyChannelMatrix::name() const { return "channelMatrix"; }
void ApplyChannelMatrix::describe()
{
m_outChunk->f.channelCount = m_outChannels;
m_outChunk->f.pcm.minClip = m_minClip;
m_outChunk->f.pcm.maxClip = m_maxClip;
}
void ApplyChannelMatrix::run(Chunk &inChunk, Chunk &outChunk)
{
switch (m_format)
{
case kInt8:
run<int8_t>(inChunk.buffer, outChunk.buffer, inChunk.frameCount);
break;
case kInt16:
run<int16_t>(inChunk.buffer, outChunk.buffer, inChunk.frameCount);
break;
case kInt24:
case kInt32:
run<int32_t>(inChunk.buffer, outChunk.buffer, inChunk.frameCount);
break;
case kFloat:
run<float>(inChunk.buffer, outChunk.buffer, inChunk.frameCount);
break;
case kDouble:
run<double>(inChunk.buffer, outChunk.buffer, inChunk.frameCount);
break;
default:
assert(false);
}
}
template <typename T>
void ApplyChannelMatrix::run(const void *inputData, void *outputData, int frameCount)
{
const T *input = reinterpret_cast<const T *>(inputData);
T *output = reinterpret_cast<T *>(outputData);
for (int frame=0; frame<frameCount; frame++)
{
const T *inputSave = input;
const double *m = m_matrix;
for (int outChannel=0; outChannel < m_outChannels; outChannel++)
{
input = inputSave;
double t = 0;
for (int inChannel=0; inChannel < m_inChannels; inChannel++)
t += *input++ * *m++;
*output++ = t;
}
}
}
void ApplyChannelMatrix::initDefaultMatrix()
{
const double *matrix = NULL;
if (m_inChannels==1 && m_outChannels==2)
{
static const double m[]={1,1};
matrix = m;
}
else if (m_inChannels==1 && m_outChannels==4)
{
static const double m[]={1,1,0,0};
matrix = m;
}
else if (m_inChannels==2 && m_outChannels==1)
{
static const double m[]={.5,.5};
matrix = m;
}
else if (m_inChannels==2 && m_outChannels==4)
{
static const double m[]={1,0,0,1,0,0,0,0};
matrix = m;
}
else if (m_inChannels==4 && m_outChannels==1)
{
static const double m[]={.5,.5,.5,.5};
matrix = m;
}
else if (m_inChannels==4 && m_outChannels==2)
{
static const double m[]={1,0,1,0,0,1,0,1};
matrix = m;
}
if (matrix)
{
std::copy(matrix, matrix + m_inChannels * m_outChannels, m_matrix);
}
else
{
for (int i=0; i < m_inChannels; i++)
for (int j=0; j < m_outChannels; j++)
m_matrix[j*m_inChannels + i] = (i==j) ? 1 : 0;
}
}
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