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/*
* Copyright (C) 2004, 2005, 2006, 2008, 2009, 2010 Savoir-Faire Linux Inc.
* Author: Alexandre Savard <alexandre.savard@savoirfairelinux.com>
*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Additional permission under GNU GPL version 3 section 7:
*
* If you modify this program, or any covered work, by linking or
* combining it with the OpenSSL project's OpenSSL library (or a
* modified version of that library), containing parts covered by the
* terms of the OpenSSL or SSLeay licenses, Savoir-Faire Linux Inc.
* grants you additional permission to convey the resulting work.
* Corresponding Source for a non-source form of such a combination
* shall include the source code for the parts of OpenSSL used as well
* as that of the covered work.
*/
#include <iostream>
#include <iterator>
#include <algorithm>
#include <math.h>
#include "resamplertest.h"
ResamplerTest::ResamplerTest() :
CppUnit::TestCase("Resampler module test"), inputBuffer(), outputBuffer()
{}
void ResamplerTest::setUp()
{
}
void ResamplerTest::tearDown()
{
}
namespace {
template <typename T>
void print_buffer(T &buffer)
{
std::copy(buffer.begin(), buffer.end(),
std::ostream_iterator<SFLDataFormat>(std::cout, ", "));
std::cout << std::endl;
}
}
void ResamplerTest::testUpsamplingRamp()
{
// generate input samples and store them in inputBuffer
generateRamp();
std::cout << "Test Upsampling Ramp" << std::endl;
SamplerateConverter converter(44100);
performUpsampling(converter);
LowSmplrBuffer tmpInputBuffer;
HighSmplrBuffer tmpOutputBuffer;
std::copy(inputBuffer.begin(), inputBuffer.begin() + tmpInputBuffer.size(), tmpInputBuffer.begin());
std::cout << "Input Buffer" << std::endl;
print_buffer(tmpInputBuffer);
std::copy(outputBuffer.begin(), outputBuffer.begin() + tmpOutputBuffer.size(), tmpOutputBuffer.begin());
std::cout << "Output Buffer" << std::endl;
print_buffer(tmpOutputBuffer);
}
void ResamplerTest::testDownsamplingRamp()
{
generateRamp();
std::cout << "Test Downsampling Ramp" << std::endl;
SamplerateConverter converter(44100);
performDownsampling(converter);
HighSmplrBuffer tmpInputBuffer;
LowSmplrBuffer tmpOutputBuffer;
std::copy(inputBuffer.begin(), inputBuffer.begin() + tmpInputBuffer.size(), tmpInputBuffer.begin());
std::cout << "Input Buffer" << std::endl;
print_buffer(tmpInputBuffer);
std::copy(outputBuffer.begin(), outputBuffer.begin() + tmpOutputBuffer.size(), tmpOutputBuffer.begin());
std::cout << "Output Buffer" << std::endl;
print_buffer(tmpOutputBuffer);
}
void ResamplerTest::testUpsamplingTriangle()
{
generateTriangularSignal();
std::cout << "Test Upsampling Triangle" << std::endl;
SamplerateConverter converter(44100);
performUpsampling(converter);
LowSmplrBuffer tmpInputBuffer;
HighSmplrBuffer tmpOutputBuffer;
std::copy(inputBuffer.begin(), inputBuffer.begin() + tmpInputBuffer.size(), tmpInputBuffer.begin());
std::cout << "Input Buffer" << std::endl;
print_buffer(tmpInputBuffer);
std::copy(outputBuffer.begin(), outputBuffer.begin() + tmpOutputBuffer.size(), tmpOutputBuffer.begin());
std::cout << "Output Buffer" << std::endl;
print_buffer(tmpOutputBuffer);
}
void ResamplerTest::testDownsamplingTriangle()
{
generateTriangularSignal();
std::cout << "Test Downsampling Triangle" << std::endl;
SamplerateConverter converter(44100);
performDownsampling(converter);
HighSmplrBuffer tmpInputBuffer;
LowSmplrBuffer tmpOutputBuffer;
std::copy(inputBuffer.begin(), inputBuffer.begin() + tmpInputBuffer.size(), tmpInputBuffer.begin());
std::cout << "Input Buffer" << std::endl;
print_buffer(tmpInputBuffer);
std::copy(outputBuffer.begin(), outputBuffer.begin() + tmpOutputBuffer.size(), tmpOutputBuffer.begin());
std::cout << "Output Buffer" << std::endl;
print_buffer(tmpOutputBuffer);
}
void ResamplerTest::testUpsamplingSine()
{
// generate input samples and store them in inputBuffer
generateSineSignal();
std::cout << "Test Upsampling Sine" << std::endl;
SamplerateConverter converter(44100);
performUpsampling(converter);
LowSmplrBuffer tmpInputBuffer;
HighSmplrBuffer tmpOutputBuffer;
std::copy(inputBuffer.begin(), inputBuffer.begin() + tmpInputBuffer.size(), tmpInputBuffer.begin());
std::cout << "Input Buffer" << std::endl;
print_buffer(tmpInputBuffer);
std::copy(outputBuffer.begin(), outputBuffer.begin() + tmpOutputBuffer.size(), tmpOutputBuffer.begin());
std::cout << "Output Buffer" << std::endl;
print_buffer(tmpOutputBuffer);
}
void ResamplerTest::testDownsamplingSine()
{
// generate input samples and store them in inputBuffer
generateSineSignal();
std::cout << "Test Downsampling Sine" << std::endl;
SamplerateConverter converter(44100);
performDownsampling(converter);
HighSmplrBuffer tmpInputBuffer;
LowSmplrBuffer tmpOutputBuffer;
std::copy(inputBuffer.begin(), inputBuffer.begin() + tmpInputBuffer.size(), tmpInputBuffer.begin());
std::cout << "Input Buffer" << std::endl;
print_buffer(tmpInputBuffer);
std::copy(outputBuffer.begin(), outputBuffer.begin() + tmpOutputBuffer.size(), tmpOutputBuffer.begin());
std::cout << "Output Buffer" << std::endl;
print_buffer(tmpOutputBuffer);
}
void ResamplerTest::generateRamp()
{
for (size_t i = 0; i < inputBuffer.size(); ++i)
inputBuffer[i] = i;
}
void ResamplerTest::generateTriangularSignal()
{
for (size_t i = 0; i < inputBuffer.size(); ++i)
inputBuffer[i] = i * 10;
}
void ResamplerTest::generateSineSignal()
{
for (size_t i = 0; i < inputBuffer.size(); ++i)
inputBuffer[i] = (SFLDataFormat) (1000.0 * sin(i));
}
void ResamplerTest::performUpsampling(SamplerateConverter &converter)
{
LowSmplrBuffer tmpInputBuffer;
HighSmplrBuffer tmpOutputBuffer;
for (size_t i = 0, j = 0; i < (inputBuffer.size() / 2); i += tmpInputBuffer.size(), j += tmpOutputBuffer.size()) {
std::copy(inputBuffer.begin() + i, inputBuffer.begin() + tmpInputBuffer.size() + i, tmpInputBuffer.begin());
converter.resample(tmpInputBuffer.data(), tmpOutputBuffer.data(), tmpOutputBuffer.size(), 8000, 16000, tmpInputBuffer.size());
std::copy(tmpOutputBuffer.begin(), tmpOutputBuffer.end(), outputBuffer.begin() + j);
}
}
void ResamplerTest::performDownsampling(SamplerateConverter &converter)
{
HighSmplrBuffer tmpInputBuffer;
LowSmplrBuffer tmpOutputBuffer;
for (size_t i = 0, j = 0; i < inputBuffer.size(); i += tmpInputBuffer.size(), j += tmpOutputBuffer.size()) {
std::copy(inputBuffer.begin() + i, inputBuffer.begin() + tmpInputBuffer.size() + i, tmpInputBuffer.begin());
converter.resample(tmpInputBuffer.data(), tmpOutputBuffer.data(), tmpOutputBuffer.size(), 16000, 8000, tmpInputBuffer.size());
std::copy(tmpOutputBuffer.begin(), tmpOutputBuffer.end(), outputBuffer.begin() + j);
}
}
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