89 lines
4.1 KiB
C
89 lines
4.1 KiB
C
/*-*- 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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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "dsp/core/core.h"
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#include "dsp/core/q.h"
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#include "libc/macros.h"
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#include "libc/runtime/gc.h"
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#include "libc/str/str.h"
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#include "libc/testlib/ezbench.h"
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#include "libc/testlib/testlib.h"
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#include "libc/x/x.h"
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long I[6];
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TEST(GetIntegerCoefficients, testBt601Vectors) {
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const struct {
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int m, L, H;
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double r[6];
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long n[6];
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} V[] = {
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{8, 16, 235, {.299, .587, .114}, {77, 150, 29}},
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{9, 16, 235, {.299, .587, .114}, {153, 301, 58}},
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{10, 16, 235, {.299, .587, .114}, {306, 601, 117}},
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{11,
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16,
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235,
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{.299, .587, .114, 1, 1, 1},
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{612, 1202, NoDebug() ? 233 : 234, 2048, 2048, 2048}},
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{12, 16, 235, {.299, .587, .114}, {1225, 2404, 467}},
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{13, 16, 235, {.299, .587, .114}, {2449, 4809, 934}},
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{14, 16, 235, {.299, .587, .114}, {4899, 9617, 1868}},
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{15, 16, 235, {.299, .587, .114}, {9798, 19235, NoDebug() ? 3736 : 3735}},
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{16, 16, 235, {.299, .587, .114}, {19595, 38470, 7471}},
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};
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long i, got[6];
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for (i = 0; i < ARRAYLEN(V); ++i) {
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GetIntegerCoefficients(got, V[i].r, V[i].m, V[i].L, V[i].H);
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EXPECT_EQ(0, memcmp(V[i].n, got, sizeof(got)),
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"got={%ld,%ld,%ld,%ld,%ld,%ld}, want={%ld,%ld,%ld,%ld,%ld,%ld}",
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got[0], got[1], got[2], got[3], got[4], got[5], V[i].n[0],
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V[i].n[1], V[i].n[2], V[i].n[3], V[i].n[4], V[i].n[5]);
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}
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}
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TEST(GetIntegerCoefficients, testForYCbCr2Rgb) {
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double C[6] = {.299, .587, .114};
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GetIntegerCoefficients(I, C, 11, 16, 232);
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EXPECT_EQ(612, I[0]);
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EXPECT_EQ(1202, I[1]);
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EXPECT_EQ(NoDebug() ? 233 : 234, I[2]);
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}
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TEST(GetIntegerCoefficients, testForGaussian) {
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#define G(A, B, C, D, E) lrint((A + 4 * B + 6 * C + 4 * D + E) / 16.)
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double C[6] = {1 / 16., 4 / 16., 6 / 16., 4 / 16., 1 / 16.};
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long M = 22, N[6], B[6] = {12, 191, 174, 205, 35};
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GetIntegerCoefficients(N, C, M, 0, 255);
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EXPECT_EQ(262144, N[0]);
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EXPECT_EQ(1048576, N[1]);
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EXPECT_EQ(1572864, N[2]);
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EXPECT_EQ(1048576, N[3]);
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EXPECT_EQ(262144, N[4]);
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EXPECT_EQ(G(B[0], B[1], B[2], B[3], B[4]),
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(N[0] * B[0] + N[1] * B[1] + N[2] * B[2] + N[3] * B[3] +
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N[4] * B[4] + N[5] * B[5] + (1l << (M - 1))) >>
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M);
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}
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BENCH(GetIntegerCoefficients, bench) {
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double C[6] = {.299, .587, .114};
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EZBENCH2("getintegercoefficients", donothing,
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GetIntegerCoefficients(I, C, 11, 16, 232));
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}
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