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//
// libavg - Media Playback Engine.
// Copyright (C) 2003-2014 Ulrich von Zadow
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser 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
//
// Current versions can be found at www.libavg.de
//
#include "Dynamics.h"
#include "../base/TestSuite.h"
#include "../base/MathHelper.h"
#include <stdlib.h>
#include <iostream>
using namespace avg;
using namespace std;
class LimiterTest: public Test {
public:
LimiterTest()
: Test("LimiterTest", 2)
{
}
void runTests()
{
const int CHANNELS = 2;
float fs = 44100.f;
int numSamples = int(fs * 0.1f);
// Setup a brickwall limiter
typedef Dynamics<float, CHANNELS> TStereoLimiter;
TStereoLimiter* d = new TStereoLimiter(fs);
d->setThreshold(0.f); // in dB
d->setAttackTime(0.f); // in seconds
d->setReleaseTime(0.05f); // in seconds
d->setRmsTime(0.f); // in seconds
d->setRatio(std::numeric_limits<float>::infinity());
d->setMakeupGain(0.f); // in dB
// Generate input and output test data
float* pSamples = new float[CHANNELS*numSamples];
for (int j = 0; j < numSamples; j++) {
for (int i = 0; i < CHANNELS; i++) {
pSamples[j*CHANNELS+i] = 2*sin(j*(440.f/44100)*float(M_PI));
}
}
// Let the limiter work.
for (int i=0; i<numSamples; ++i) {
d->process(pSamples+i*CHANNELS);
}
// Check if everything is ok.
bool bDiscontinuities = false;
bool bAboveThreshold = false;
for (int j = 1; j < numSamples; j++) {
for (int i = 0; i < CHANNELS; i++) {
// Test if anything is above the threshold.
if (pSamples[j*CHANNELS+i] > 1) {
bAboveThreshold = true;
}
if (fabs(pSamples[j*CHANNELS+i]-pSamples[(j-1)*CHANNELS+i]) > 0.05f) {
bDiscontinuities = true;
// cerr << j << ": " << outSamples[j*OUT_CHANNELS+i] << ", " <<
// outSamples[(j-1)*OUT_CHANNELS+i] << endl;
}
}
}
TEST(!bAboveThreshold);
TEST(!bDiscontinuities);
/*
// Save data to ascii file.
FILE * pFile = fopen("data.txt", "w");
for (int j = 0; j < numSamples; j++) {
fprintf(pFile, "%f\n", pSamples[j*OUT_CHANNELS]);
}
fclose(pFile);
*/
// Free memory
delete d;
delete[] pSamples;
}
};
int main(int nargs, char** args)
{
LimiterTest test;
test.runTests();
bool bOK = test.isOk();
if (bOK) {
return 0;
} else {
return 1;
}
}
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