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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* resampler.cc
*
* Sun Oct 5 20:16:22 CEST 2014
* Copyright 2014 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo 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 3 of the License, or
* (at your option) any later version.
*
* DrumGizmo 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 DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "dgunit.h"
#include "../src/chresampler.h"
#define BUFSZ 500
static float roundoff(float a) { return a<0.5?0:1; }
class test_resampler
: public DGUnit
{
public:
test_resampler()
{
DGUNIT_TEST(test_resampler::resampling);
DGUNIT_TEST(test_resampler::resampling_buffer_sizes);
}
void resampling()
{
CHResampler r;
DGUNIT_ASSERT_EQUAL(1.0, r.getRatio());
r.setup(44100.0, 48000.0);
DGUNIT_ASSERT_EQUAL(44100.0/48000.0, r.getRatio());
float in[BUFSZ];
for(int i = 0; i < BUFSZ; i++) in[i] = 0;//(float)i/(float)BUFSZ;
in[100] = 1.0;
float out[BUFSZ];
r.setInputSamples(in, sizeof(in) / sizeof(float));
r.setOutputSamples(out, sizeof(out) / sizeof(float));
r.process();
DGUNIT_ASSERT_EQUAL((size_t)0, r.getInputSampleCount());
// DGUNIT_ASSERT_EQUAL(, r.getOutputSampleCount());
int outidx = -1;
int inidx = -1;
for(int i = 0; i < BUFSZ - (int)r.getOutputSampleCount(); i++) {
if(in[i] == 1.0) inidx = i;
if(roundoff(out[i]) == 1.0) outidx = i;
//printf("in[% 4d]\t= %f\t", i, in[i]);
//printf("out[% 4d]\t= %f\n", i, out[i]);
}
DGUNIT_ASSERT(inidx != -1);
DGUNIT_ASSERT(outidx != -1);
//printf("inidx: %d - outidx: %d\n", inidx, outidx);
//DGUNIT_ASSERT_EQUAL(71, inidx - outidx); // This does not make sense...
}
void resampling_buffer_sizes()
{
CHResampler r;
DGUNIT_ASSERT_EQUAL(1.0, r.getRatio());
double infs = 24000;
double outfs = 48000;
r.setup(infs, outfs);
DGUNIT_ASSERT_EQUAL(infs / outfs, r.getRatio());
float in[BUFSZ];
float out[(int)(BUFSZ / r.getRatio())];
// Preload resampler
r.setOutputSamples(out, 1);
while(r.getOutputSampleCount()) {
r.setInputSamples(in, 1);
r.process();
}
r.setInputSamples(in, sizeof(in) / sizeof(float));
r.setOutputSamples(out, sizeof(out) / sizeof(float));
r.process();
DGUNIT_ASSERT_EQUAL((size_t)0, r.getInputSampleCount());
DGUNIT_ASSERT_EQUAL((size_t)0, r.getOutputSampleCount());
}
};
// Registers the fixture into the 'registry'
static test_resampler test;
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