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/*
Copyright (C) 2015 Carl Hetherington <cth@carlh.net>
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 2 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.
*/
#include "lib/audio_delay.h"
#include "lib/audio_buffers.h"
#include <boost/test/unit_test.hpp>
#include <cmath>
using std::cerr;
using std::cout;
using boost::shared_ptr;
#define CHECK_SAMPLE(c,f,r) \
if (fabs(out->data(c)[f] - (r)) > 0.1) { \
cerr << "Sample " << f << " at line " << __LINE__ << " is " << out->data(c)[f] << " not " << r << "; difference is " << fabs(out->data(c)[f] - (r)) << "\n"; \
BOOST_REQUIRE (fabs(out->data(c)[f] - (r)) <= 0.1); \
}
/** Block size greater than delay */
BOOST_AUTO_TEST_CASE (audio_processor_delay_test1)
{
AudioDelay delay (64);
int const C = 2;
shared_ptr<AudioBuffers> in (new AudioBuffers (C, 256));
for (int i = 0; i < C; ++i) {
for (int j = 0; j < 256; ++j) {
in->data(i)[j] = j;
}
}
shared_ptr<AudioBuffers> out = delay.run (in);
BOOST_REQUIRE_EQUAL (out->frames(), in->frames());
/* Silence at the start */
for (int i = 0; i < C; ++i) {
for (int j = 0; j < 64; ++j) {
CHECK_SAMPLE (i, j, 0);
}
}
/* Then the delayed data */
for (int i = 0; i < C; ++i) {
for (int j = 64; j < 256; ++j) {
CHECK_SAMPLE (i, j, j - 64);
}
}
/* Feed some more in */
for (int i = 0; i < C; ++i) {
for (int j = 0; j < 256; ++j) {
in->data(i)[j] = j + 256;
}
}
out = delay.run (in);
/* Check again */
for (int i = 0; i < C; ++i) {
for (int j = 256; j < 512; ++j) {
CHECK_SAMPLE (i, j - 256, j - 64);
}
}
}
/** Block size less than delay */
BOOST_AUTO_TEST_CASE (audio_processor_delay_test2)
{
AudioDelay delay (256);
int const C = 2;
/* Feeding 4 blocks of 64 should give silence each time */
for (int i = 0; i < 4; ++i) {
cout << "i=" << i << "\n";
shared_ptr<AudioBuffers> in (new AudioBuffers (C, 64));
for (int j = 0; j < C; ++j) {
for (int k = 0; k < 64; ++k) {
in->data(j)[k] = k + i * 64;
}
}
shared_ptr<AudioBuffers> out = delay.run (in);
BOOST_REQUIRE_EQUAL (out->frames(), in->frames());
/* Check for silence */
for (int j = 0; j < C; ++j) {
for (int k = 0; k < 64; ++k) {
CHECK_SAMPLE (j, k, 0);
}
}
}
/* Now feed 4 blocks of silence and we should see the data */
for (int i = 0; i < 4; ++i) {
/* Feed some silence */
shared_ptr<AudioBuffers> in (new AudioBuffers (C, 64));
in->make_silent ();
shared_ptr<AudioBuffers> out = delay.run (in);
/* Should now see the delayed data */
for (int j = 0; j < C; ++j) {
for (int k = 0; k < 64; ++k) {
CHECK_SAMPLE (j, k, k + i * 64);
}
}
}
}
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