162 lines
5.5 KiB
C
162 lines
5.5 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ 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; version 2 of the License. │
|
|
│ │
|
|
│ 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 "dsp/core/core.h"
|
|
#include "dsp/mpeg/mpeg.h"
|
|
#include "libc/limits.h"
|
|
#include "libc/log/check.h"
|
|
#include "libc/macros.h"
|
|
#include "libc/nexgen32e/x86feature.h"
|
|
#include "libc/rand/rand.h"
|
|
#include "libc/runtime/buffer.h"
|
|
#include "libc/testlib/ezbench.h"
|
|
#include "libc/testlib/testlib.h"
|
|
|
|
short pcm[8][8];
|
|
|
|
TEST(scalevolume, testIncreaseVolumeByOneIncrement) {
|
|
pcm[0][0] = INT16_MIN;
|
|
pcm[0][1] = INT16_MIN / 2;
|
|
pcm[0][2] = -2;
|
|
pcm[0][3] = -1;
|
|
pcm[0][4] = 0;
|
|
pcm[0][5] = 1;
|
|
pcm[0][6] = 2;
|
|
pcm[0][7] = INT16_MAX / 2;
|
|
pcm[1][0] = INT16_MAX;
|
|
scalevolume(ARRAYLEN(pcm), pcm, 1);
|
|
EXPECT_EQ(INT16_MIN, pcm[0][0]);
|
|
EXPECT_EQ(INT16_MIN, pcm[0][1]);
|
|
EXPECT_EQ(-4, pcm[0][2]);
|
|
EXPECT_EQ(-2, pcm[0][3]);
|
|
EXPECT_EQ(0, pcm[0][4]);
|
|
EXPECT_EQ(2, pcm[0][5]);
|
|
EXPECT_EQ(4, pcm[0][6]);
|
|
EXPECT_EQ(INT16_MAX - 1, pcm[0][7]);
|
|
EXPECT_EQ(INT16_MAX, pcm[1][0]);
|
|
}
|
|
|
|
TEST(scalevolume, testDecreaseVolumeByOneIncrement) {
|
|
pcm[0][0] = INT16_MIN;
|
|
pcm[0][1] = INT16_MIN / 2;
|
|
pcm[0][2] = -2;
|
|
pcm[0][3] = -1;
|
|
pcm[0][4] = 0;
|
|
pcm[0][5] = 1;
|
|
pcm[0][6] = 2;
|
|
pcm[0][7] = INT16_MAX / 2;
|
|
pcm[1][0] = INT16_MAX;
|
|
scalevolume(ARRAYLEN(pcm), pcm, -1);
|
|
EXPECT_EQ(INT16_MIN / 2, pcm[0][0]);
|
|
EXPECT_EQ(INT16_MIN / 4, pcm[0][1]);
|
|
EXPECT_EQ(-1, pcm[0][2]);
|
|
EXPECT_EQ(-1, pcm[0][3]);
|
|
EXPECT_EQ(0, pcm[0][4]);
|
|
EXPECT_EQ(0, pcm[0][5]);
|
|
EXPECT_EQ(1, pcm[0][6]);
|
|
EXPECT_EQ(INT16_MAX / 4, pcm[0][7]);
|
|
EXPECT_EQ(INT16_MAX / 2, pcm[1][0]);
|
|
}
|
|
|
|
TEST(scalevolume, testScaleByZero_doesNothing) {
|
|
pcm[0][0] = INT16_MIN;
|
|
pcm[0][1] = INT16_MIN / 2;
|
|
pcm[0][2] = -2;
|
|
pcm[0][3] = -1;
|
|
pcm[0][4] = 0;
|
|
pcm[0][5] = 1;
|
|
pcm[0][6] = 2;
|
|
pcm[0][7] = INT16_MAX / 2;
|
|
pcm[1][0] = INT16_MAX;
|
|
scalevolume(ARRAYLEN(pcm), pcm, 0);
|
|
EXPECT_EQ(INT16_MIN, pcm[0][0]);
|
|
EXPECT_EQ(INT16_MIN / 2, pcm[0][1]);
|
|
EXPECT_EQ(-2, pcm[0][2]);
|
|
EXPECT_EQ(-1, pcm[0][3]);
|
|
EXPECT_EQ(0, pcm[0][4]);
|
|
EXPECT_EQ(1, pcm[0][5]);
|
|
EXPECT_EQ(2, pcm[0][6]);
|
|
EXPECT_EQ(INT16_MAX / 2, pcm[0][7]);
|
|
EXPECT_EQ(INT16_MAX, pcm[1][0]);
|
|
}
|
|
|
|
TEST(scalevolume, testBiggestScale_justSaturates) {
|
|
pcm[0][0] = INT16_MIN;
|
|
pcm[0][1] = INT16_MIN / 2;
|
|
pcm[0][2] = -2;
|
|
pcm[0][3] = -1;
|
|
pcm[0][4] = 0;
|
|
pcm[0][5] = 1;
|
|
pcm[0][6] = 2;
|
|
pcm[0][7] = INT16_MAX / 2;
|
|
pcm[1][0] = INT16_MAX;
|
|
scalevolume(ARRAYLEN(pcm), pcm, 123);
|
|
EXPECT_EQ(INT16_MIN, pcm[0][0]);
|
|
EXPECT_EQ(INT16_MIN, pcm[0][1]);
|
|
EXPECT_EQ(INT16_MIN, pcm[0][2]);
|
|
EXPECT_EQ(INT16_MIN, pcm[0][3]);
|
|
EXPECT_EQ(0, pcm[0][4]);
|
|
EXPECT_EQ(INT16_MAX, pcm[0][5]);
|
|
EXPECT_EQ(INT16_MAX, pcm[0][6]);
|
|
EXPECT_EQ(INT16_MAX, pcm[0][7]);
|
|
EXPECT_EQ(INT16_MAX, pcm[1][0]);
|
|
}
|
|
|
|
TEST(scalevolume, testSmallestScale_justSaturates) {
|
|
pcm[0][0] = INT16_MIN;
|
|
pcm[0][1] = INT16_MIN / 2;
|
|
pcm[0][2] = -2;
|
|
pcm[0][3] = -1;
|
|
pcm[0][4] = 0;
|
|
pcm[0][5] = 1;
|
|
pcm[0][6] = 2;
|
|
pcm[0][7] = INT16_MAX / 2;
|
|
pcm[1][0] = INT16_MAX;
|
|
scalevolume(ARRAYLEN(pcm), pcm, -123);
|
|
EXPECT_EQ(-1, pcm[0][0]);
|
|
EXPECT_EQ(-1, pcm[0][1]);
|
|
EXPECT_EQ(-1, pcm[0][2]);
|
|
EXPECT_EQ(-1, pcm[0][3]);
|
|
EXPECT_EQ(0, pcm[0][4]);
|
|
EXPECT_EQ(0, pcm[0][5]);
|
|
EXPECT_EQ(0, pcm[0][6]);
|
|
EXPECT_EQ(0, pcm[0][7]);
|
|
EXPECT_EQ(0, pcm[1][0]);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// audio volume adjustment latency:
|
|
// - ~1µs w/ -Os
|
|
// - ~500ns w/ -O3
|
|
// - ~200ns w/ -O3 -march=skylake MODE=rel
|
|
|
|
void randomizeaudio(void) {
|
|
rngset(pcm, sizeof(pcm), rand64, -1);
|
|
}
|
|
|
|
void scalevolume_pure(int amt) {
|
|
scalevolume(ARRAYLEN(pcm), pcm, amt);
|
|
}
|
|
|
|
BENCH(scalevolume, audioframe) {
|
|
EZBENCH(randomizeaudio(), scalevolume_pure(0));
|
|
EZBENCH(randomizeaudio(), scalevolume_pure(1));
|
|
EZBENCH(randomizeaudio(), scalevolume_pure(15));
|
|
}
|