85 lines
3.4 KiB
C
85 lines
3.4 KiB
C
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "dsp/core/core.h"
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#include "dsp/mpeg/mpeg.h"
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#include "libc/log/check.h"
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#include "libc/macros.h"
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#include "libc/rand/rand.h"
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#include "libc/runtime/buffer.h"
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#include "libc/testlib/ezbench.h"
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#include "libc/testlib/testlib.h"
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short pcm[8][8];
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float binary32[8][8];
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struct GuardedBuffer b1, b2;
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TEST(float2short, test) {
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binary32[0][0] = -0.5;
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binary32[0][1] = 0.0;
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binary32[0][2] = 0.5;
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float2short(8, pcm, binary32);
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EXPECT_EQ(-16384, pcm[0][0]);
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EXPECT_EQ(0, pcm[0][1]);
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EXPECT_EQ(16384, pcm[0][2]);
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}
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TEST(float2short, testOverflow) {
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binary32[0][0] = -1.1;
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binary32[0][1] = -1.0;
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binary32[0][2] = 1.0;
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binary32[0][3] = 1.1;
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float2short(8, pcm, binary32);
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EXPECT_EQ(-32768, pcm[0][0]);
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EXPECT_EQ(-32768, pcm[0][1]);
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EXPECT_EQ(32767, pcm[0][2]);
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EXPECT_EQ(32767, pcm[0][3]);
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}
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void unclamped(size_t n, short pcm16[n][8], const float binary32[n][8]) {
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size_t i, j;
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for (i = 0; i < n; ++i) {
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for (j = 0; j < 8; ++j) {
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pcm16[i][j] = binary32[i][j] * 32768;
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}
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}
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}
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plm_samples_t samps;
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void randomizeaudio(void) {
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size_t i;
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for (i = 0; i < ARRAYLEN(samps.interleaved); ++i) {
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samps.interleaved[i] = randf();
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}
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}
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void float2short_pure(void) {
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float2short(ARRAYLEN(samps.interleaved) / 8, pcm, (void *)samps.interleaved);
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}
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void float2short_unclamped(void) {
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unclamped(ARRAYLEN(samps.interleaved) / 8, pcm, (void *)samps.interleaved);
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}
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BENCH(float2short, audioframe) {
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EZBENCH(randomizeaudio(), float2short_pure());
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EZBENCH(randomizeaudio(), float2short_unclamped());
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}
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