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/*
* Copyright (C) 2003-2012 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "test_pcm_all.h"
#include "pcm_volume.h"
#include <glib.h>
#include <string.h>
void
test_pcm_volume_8(void)
{
enum { N = 256 };
static const int8_t zero[N];
int8_t src[N];
for (unsigned i = 0; i < N; ++i)
src[i] = g_random_int();
int8_t dest[N];
memcpy(dest, src, sizeof(src));
g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S8,
0), ==, true);
g_assert_cmpint(memcmp(dest, zero, sizeof(zero)), ==, 0);
memcpy(dest, src, sizeof(src));
g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S8,
PCM_VOLUME_1), ==, true);
g_assert_cmpint(memcmp(dest, src, sizeof(src)), ==, 0);
memcpy(dest, src, sizeof(src));
g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S8,
PCM_VOLUME_1 / 2), ==, true);
for (unsigned i = 0; i < N; ++i) {
g_assert_cmpint(dest[i], >=, (src[i] - 1) / 2);
g_assert_cmpint(dest[i], <=, src[i] / 2 + 1);
}
}
void
test_pcm_volume_16(void)
{
enum { N = 256 };
static const int16_t zero[N];
int16_t src[N];
for (unsigned i = 0; i < N; ++i)
src[i] = g_random_int();
int16_t dest[N];
memcpy(dest, src, sizeof(src));
g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S16,
0), ==, true);
g_assert_cmpint(memcmp(dest, zero, sizeof(zero)), ==, 0);
memcpy(dest, src, sizeof(src));
g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S16,
PCM_VOLUME_1), ==, true);
g_assert_cmpint(memcmp(dest, src, sizeof(src)), ==, 0);
memcpy(dest, src, sizeof(src));
g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S16,
PCM_VOLUME_1 / 2), ==, true);
for (unsigned i = 0; i < N; ++i) {
g_assert_cmpint(dest[i], >=, (src[i] - 1) / 2);
g_assert_cmpint(dest[i], <=, src[i] / 2 + 1);
}
}
/**
* Generate a random 24 bit PCM sample.
*/
static int32_t
random24(void)
{
int32_t x = g_random_int() & 0xffffff;
if (x & 0x800000)
x |= 0xff000000;
return x;
}
void
test_pcm_volume_24(void)
{
enum { N = 256 };
static const int32_t zero[N];
int32_t src[N];
for (unsigned i = 0; i < N; ++i)
src[i] = random24();
int32_t dest[N];
memcpy(dest, src, sizeof(src));
g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S24_P32,
0), ==, true);
g_assert_cmpint(memcmp(dest, zero, sizeof(zero)), ==, 0);
memcpy(dest, src, sizeof(src));
g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S24_P32,
PCM_VOLUME_1), ==, true);
g_assert_cmpint(memcmp(dest, src, sizeof(src)), ==, 0);
memcpy(dest, src, sizeof(src));
g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S24_P32,
PCM_VOLUME_1 / 2), ==, true);
for (unsigned i = 0; i < N; ++i) {
g_assert_cmpint(dest[i], >=, (src[i] - 1) / 2);
g_assert_cmpint(dest[i], <=, src[i] / 2 + 1);
}
}
void
test_pcm_volume_32(void)
{
enum { N = 256 };
static const int32_t zero[N];
int32_t src[N];
for (unsigned i = 0; i < N; ++i)
src[i] = g_random_int();
int32_t dest[N];
memcpy(dest, src, sizeof(src));
g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S32,
0), ==, true);
g_assert_cmpint(memcmp(dest, zero, sizeof(zero)), ==, 0);
memcpy(dest, src, sizeof(src));
g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S32,
PCM_VOLUME_1), ==, true);
g_assert_cmpint(memcmp(dest, src, sizeof(src)), ==, 0);
memcpy(dest, src, sizeof(src));
g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_S32,
PCM_VOLUME_1 / 2), ==, true);
for (unsigned i = 0; i < N; ++i) {
g_assert_cmpint(dest[i], >=, (src[i] - 1) / 2);
g_assert_cmpint(dest[i], <=, src[i] / 2 + 1);
}
}
void
test_pcm_volume_float(void)
{
enum { N = 256 };
static const float zero[N];
float src[N];
for (unsigned i = 0; i < N; ++i)
src[i] = g_random_double_range(-1.0, 1.0);
float dest[N];
memcpy(dest, src, sizeof(src));
g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_FLOAT,
0), ==, true);
g_assert_cmpint(memcmp(dest, zero, sizeof(zero)), ==, 0);
memcpy(dest, src, sizeof(src));
g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_FLOAT,
PCM_VOLUME_1), ==, true);
g_assert_cmpint(memcmp(dest, src, sizeof(src)), ==, 0);
memcpy(dest, src, sizeof(src));
g_assert_cmpint(pcm_volume(dest, sizeof(dest), SAMPLE_FORMAT_FLOAT,
PCM_VOLUME_1 / 2), ==, true);
for (unsigned i = 0; i < N; ++i)
g_assert_cmpfloat(dest[i], ==, src[i] / 2);
}
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