+/*
+ 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);
+ }
+ }
+ }
+}