diff options
Diffstat (limited to 'files/unit_test/color_test.cc')
| -rw-r--r-- | files/unit_test/color_test.cc | 570 |
1 files changed, 570 insertions, 0 deletions
diff --git a/files/unit_test/color_test.cc b/files/unit_test/color_test.cc new file mode 100644 index 00000000..36041d99 --- /dev/null +++ b/files/unit_test/color_test.cc @@ -0,0 +1,570 @@ +/* + * Copyright 2015 The LibYuv Project Authors. All rights reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#include <stdlib.h> + +#include "libyuv/basic_types.h" +#include "libyuv/convert.h" +#include "libyuv/convert_argb.h" +#include "libyuv/convert_from.h" +#include "libyuv/convert_from_argb.h" +#include "libyuv/cpu_id.h" +#include "../unit_test/unit_test.h" + +namespace libyuv { + +// TODO(fbarchard): Port high accuracy YUV to RGB to Neon. +#if !defined(LIBYUV_DISABLE_NEON) && \ + (defined(__aarch64__) || defined(__ARM_NEON__) || defined(LIBYUV_NEON)) +#define ERROR_R 1 +#define ERROR_G 1 +#define ERROR_B 3 +#define ERROR_FULL 6 +#define ERROR_J420 5 +#else +#define ERROR_R 1 +#define ERROR_G 1 +#define ERROR_B 3 +#define ERROR_FULL 5 +#define ERROR_J420 3 +#endif + +#define TESTCS(TESTNAME, YUVTOARGB, ARGBTOYUV, HS1, HS, HN, DIFF) \ + TEST_F(LibYUVColorTest, TESTNAME) { \ + const int kPixels = benchmark_width_ * benchmark_height_; \ + const int kHalfPixels = ((benchmark_width_ + 1) / 2) * \ + ((benchmark_height_ + HS1) / HS); \ + align_buffer_page_end(orig_y, kPixels); \ + align_buffer_page_end(orig_u, kHalfPixels); \ + align_buffer_page_end(orig_v, kHalfPixels); \ + align_buffer_page_end(orig_pixels, kPixels * 4); \ + align_buffer_page_end(temp_y, kPixels); \ + align_buffer_page_end(temp_u, kHalfPixels); \ + align_buffer_page_end(temp_v, kHalfPixels); \ + align_buffer_page_end(dst_pixels_opt, kPixels * 4); \ + align_buffer_page_end(dst_pixels_c, kPixels * 4); \ + \ + MemRandomize(orig_pixels, kPixels * 4); \ + MemRandomize(orig_y, kPixels); \ + MemRandomize(orig_u, kHalfPixels); \ + MemRandomize(orig_v, kHalfPixels); \ + MemRandomize(temp_y, kPixels); \ + MemRandomize(temp_u, kHalfPixels); \ + MemRandomize(temp_v, kHalfPixels); \ + MemRandomize(dst_pixels_opt, kPixels * 4); \ + MemRandomize(dst_pixels_c, kPixels * 4); \ + \ + /* The test is overall for color conversion matrix being reversible, so */ \ + /* this initializes the pixel with 2x2 blocks to eliminate subsampling. */ \ + uint8* p = orig_y; \ + for (int y = 0; y < benchmark_height_ - HS1; y += HS) { \ + for (int x = 0; x < benchmark_width_ - 1; x += 2) { \ + uint8 r = static_cast<uint8>(fastrand()); \ + p[0] = r; \ + p[1] = r; \ + p[HN] = r; \ + p[HN + 1] = r; \ + p += 2; \ + } \ + if (benchmark_width_ & 1) { \ + uint8 r = static_cast<uint8>(fastrand()); \ + p[0] = r; \ + p[HN] = r; \ + p += 1; \ + } \ + p += HN; \ + } \ + if ((benchmark_height_ & 1) && HS == 2) { \ + for (int x = 0; x < benchmark_width_ - 1; x += 2) { \ + uint8 r = static_cast<uint8>(fastrand()); \ + p[0] = r; \ + p[1] = r; \ + p += 2; \ + } \ + if (benchmark_width_ & 1) { \ + uint8 r = static_cast<uint8>(fastrand()); \ + p[0] = r; \ + p += 1; \ + } \ + } \ + /* Start with YUV converted to ARGB. */ \ + YUVTOARGB(orig_y, benchmark_width_, \ + orig_u, (benchmark_width_ + 1) / 2, \ + orig_v, (benchmark_width_ + 1) / 2, \ + orig_pixels, benchmark_width_ * 4, \ + benchmark_width_, benchmark_height_); \ + \ + ARGBTOYUV(orig_pixels, benchmark_width_ * 4, \ + temp_y, benchmark_width_, \ + temp_u, (benchmark_width_ + 1) / 2, \ + temp_v, (benchmark_width_ + 1) / 2, \ + benchmark_width_, benchmark_height_); \ + \ + MaskCpuFlags(disable_cpu_flags_); \ + YUVTOARGB(temp_y, benchmark_width_, \ + temp_u, (benchmark_width_ + 1) / 2, \ + temp_v, (benchmark_width_ + 1) / 2, \ + dst_pixels_c, benchmark_width_ * 4, \ + benchmark_width_, benchmark_height_); \ + MaskCpuFlags(benchmark_cpu_info_); \ + \ + for (int i = 0; i < benchmark_iterations_; ++i) { \ + YUVTOARGB(temp_y, benchmark_width_, \ + temp_u, (benchmark_width_ + 1) / 2, \ + temp_v, (benchmark_width_ + 1) / 2, \ + dst_pixels_opt, benchmark_width_ * 4, \ + benchmark_width_, benchmark_height_); \ + } \ + /* Test C and SIMD match. */ \ + for (int i = 0; i < kPixels * 4; ++i) { \ + EXPECT_EQ(dst_pixels_c[i], dst_pixels_opt[i]); \ + } \ + /* Test SIMD is close to original. */ \ + for (int i = 0; i < kPixels * 4; ++i) { \ + EXPECT_NEAR(static_cast<int>(orig_pixels[i]), \ + static_cast<int>(dst_pixels_opt[i]), DIFF); \ + } \ + \ + free_aligned_buffer_page_end(orig_pixels); \ + free_aligned_buffer_page_end(orig_y); \ + free_aligned_buffer_page_end(orig_u); \ + free_aligned_buffer_page_end(orig_v); \ + free_aligned_buffer_page_end(temp_y); \ + free_aligned_buffer_page_end(temp_u); \ + free_aligned_buffer_page_end(temp_v); \ + free_aligned_buffer_page_end(dst_pixels_opt); \ + free_aligned_buffer_page_end(dst_pixels_c); \ +} \ + +TESTCS(TestI420, I420ToARGB, ARGBToI420, 1, 2, benchmark_width_, ERROR_FULL) +TESTCS(TestI422, I422ToARGB, ARGBToI422, 0, 1, 0, ERROR_FULL) +TESTCS(TestJ420, J420ToARGB, ARGBToJ420, 1, 2, benchmark_width_, ERROR_J420) +TESTCS(TestJ422, J422ToARGB, ARGBToJ422, 0, 1, 0, ERROR_J420) + +static void YUVToRGB(int y, int u, int v, int* r, int* g, int* b) { + const int kWidth = 16; + const int kHeight = 1; + const int kPixels = kWidth * kHeight; + const int kHalfPixels = ((kWidth + 1) / 2) * ((kHeight + 1) / 2); + + SIMD_ALIGNED(uint8 orig_y[16]); + SIMD_ALIGNED(uint8 orig_u[8]); + SIMD_ALIGNED(uint8 orig_v[8]); + SIMD_ALIGNED(uint8 orig_pixels[16 * 4]); + memset(orig_y, y, kPixels); + memset(orig_u, u, kHalfPixels); + memset(orig_v, v, kHalfPixels); + + /* YUV converted to ARGB. */ + I422ToARGB(orig_y, kWidth, + orig_u, (kWidth + 1) / 2, + orig_v, (kWidth + 1) / 2, + orig_pixels, kWidth * 4, + kWidth, kHeight); + + *b = orig_pixels[0]; + *g = orig_pixels[1]; + *r = orig_pixels[2]; +} + +static void YUVJToRGB(int y, int u, int v, int* r, int* g, int* b) { + const int kWidth = 16; + const int kHeight = 1; + const int kPixels = kWidth * kHeight; + const int kHalfPixels = ((kWidth + 1) / 2) * ((kHeight + 1) / 2); + + SIMD_ALIGNED(uint8 orig_y[16]); + SIMD_ALIGNED(uint8 orig_u[8]); + SIMD_ALIGNED(uint8 orig_v[8]); + SIMD_ALIGNED(uint8 orig_pixels[16 * 4]); + memset(orig_y, y, kPixels); + memset(orig_u, u, kHalfPixels); + memset(orig_v, v, kHalfPixels); + + /* YUV converted to ARGB. */ + J422ToARGB(orig_y, kWidth, + orig_u, (kWidth + 1) / 2, + orig_v, (kWidth + 1) / 2, + orig_pixels, kWidth * 4, + kWidth, kHeight); + + *b = orig_pixels[0]; + *g = orig_pixels[1]; + *r = orig_pixels[2]; +} + +static void YToRGB(int y, int* r, int* g, int* b) { + const int kWidth = 16; + const int kHeight = 1; + const int kPixels = kWidth * kHeight; + + SIMD_ALIGNED(uint8 orig_y[16]); + SIMD_ALIGNED(uint8 orig_pixels[16 * 4]); + memset(orig_y, y, kPixels); + + /* YUV converted to ARGB. */ + I400ToARGB(orig_y, kWidth, orig_pixels, kWidth * 4, kWidth, kHeight); + + *b = orig_pixels[0]; + *g = orig_pixels[1]; + *r = orig_pixels[2]; +} + +static void YJToRGB(int y, int* r, int* g, int* b) { + const int kWidth = 16; + const int kHeight = 1; + const int kPixels = kWidth * kHeight; + + SIMD_ALIGNED(uint8 orig_y[16]); + SIMD_ALIGNED(uint8 orig_pixels[16 * 4]); + memset(orig_y, y, kPixels); + + /* YUV converted to ARGB. */ + J400ToARGB(orig_y, kWidth, orig_pixels, kWidth * 4, kWidth, kHeight); + + *b = orig_pixels[0]; + *g = orig_pixels[1]; + *r = orig_pixels[2]; +} + +// Pick a method for clamping. +// #define CLAMPMETHOD_IF 1 +// #define CLAMPMETHOD_TABLE 1 +#define CLAMPMETHOD_TERNARY 1 +// #define CLAMPMETHOD_MASK 1 + +// Pick a method for rounding. +#define ROUND(f) static_cast<int>(f + 0.5f) +// #define ROUND(f) lrintf(f) +// #define ROUND(f) static_cast<int>(round(f)) +// #define ROUND(f) _mm_cvt_ss2si(_mm_load_ss(&f)) + +#if defined(CLAMPMETHOD_IF) +static int RoundToByte(float f) { + int i = ROUND(f); + if (i < 0) { + i = 0; + } + if (i > 255) { + i = 255; + } + return i; +} +#elif defined(CLAMPMETHOD_TABLE) +static const unsigned char clamptable[811] = { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, + 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, + 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, + 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, + 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, + 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, + 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, + 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, + 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, + 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, + 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, + 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, + 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, + 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, + 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, + 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, + 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, + 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 +}; + +static int RoundToByte(float f) { + return clamptable[ROUND(f) + 276]; +} +#elif defined(CLAMPMETHOD_TERNARY) +static int RoundToByte(float f) { + int i = ROUND(f); + return (i < 0) ? 0 : ((i > 255) ? 255 : i); +} +#elif defined(CLAMPMETHOD_MASK) +static int RoundToByte(float f) { + int i = ROUND(f); + i = ((-(i) >> 31) & (i)); // clamp to 0. + return (((255 - (i)) >> 31) | (i)) & 255; // clamp to 255. +} +#endif + +#define RANDOM256(s) ((s & 1) ? ((s >> 1) ^ 0xb8) : (s >> 1)) + +TEST_F(LibYUVColorTest, TestRoundToByte) { + int allb = 0; + int count = benchmark_width_ * benchmark_height_; + for (int i = 0; i < benchmark_iterations_; ++i) { + float f = (fastrand() & 255) * 3.14f - 260.f; + for (int j = 0; j < count; ++j) { + int b = RoundToByte(f); + f += 0.91f; + allb |= b; + } + } + EXPECT_GE(allb, 0); + EXPECT_LE(allb, 255); +} + +static void YUVToRGBReference(int y, int u, int v, int* r, int* g, int* b) { + *r = RoundToByte((y - 16) * 1.164 - (v - 128) * -1.596); + *g = RoundToByte((y - 16) * 1.164 - (u - 128) * 0.391 - (v - 128) * 0.813); + *b = RoundToByte((y - 16) * 1.164 - (u - 128) * -2.018); +} + +static void YUVJToRGBReference(int y, int u, int v, int* r, int* g, int* b) { + *r = RoundToByte(y - (v - 128) * -1.40200); + *g = RoundToByte(y - (u - 128) * 0.34414 - (v - 128) * 0.71414); + *b = RoundToByte(y - (u - 128) * -1.77200); +} + +TEST_F(LibYUVColorTest, TestYUV) { + int r0, g0, b0, r1, g1, b1; + + // cyan (less red) + YUVToRGBReference(240, 255, 0, &r0, &g0, &b0); + EXPECT_EQ(56, r0); + EXPECT_EQ(255, g0); + EXPECT_EQ(255, b0); + + YUVToRGB(240, 255, 0, &r1, &g1, &b1); + EXPECT_EQ(57, r1); + EXPECT_EQ(255, g1); + EXPECT_EQ(255, b1); + + // green (less red and blue) + YUVToRGBReference(240, 0, 0, &r0, &g0, &b0); + EXPECT_EQ(56, r0); + EXPECT_EQ(255, g0); + EXPECT_EQ(2, b0); + + YUVToRGB(240, 0, 0, &r1, &g1, &b1); + EXPECT_EQ(57, r1); + EXPECT_EQ(255, g1); + EXPECT_EQ(5, b1); + + for (int i = 0; i < 256; ++i) { + YUVToRGBReference(i, 128, 128, &r0, &g0, &b0); + YUVToRGB(i, 128, 128, &r1, &g1, &b1); + EXPECT_NEAR(r0, r1, ERROR_R); + EXPECT_NEAR(g0, g1, ERROR_G); + EXPECT_NEAR(b0, b1, ERROR_B); + + YUVToRGBReference(i, 0, 0, &r0, &g0, &b0); + YUVToRGB(i, 0, 0, &r1, &g1, &b1); + EXPECT_NEAR(r0, r1, ERROR_R); + EXPECT_NEAR(g0, g1, ERROR_G); + EXPECT_NEAR(b0, b1, ERROR_B); + + YUVToRGBReference(i, 0, 255, &r0, &g0, &b0); + YUVToRGB(i, 0, 255, &r1, &g1, &b1); + EXPECT_NEAR(r0, r1, ERROR_R); + EXPECT_NEAR(g0, g1, ERROR_G); + EXPECT_NEAR(b0, b1, ERROR_B); + } +} + +TEST_F(LibYUVColorTest, TestGreyYUV) { + int r0, g0, b0, r1, g1, b1, r2, g2, b2; + + // black + YUVToRGBReference(16, 128, 128, &r0, &g0, &b0); + EXPECT_EQ(0, r0); + EXPECT_EQ(0, g0); + EXPECT_EQ(0, b0); + + YUVToRGB(16, 128, 128, &r1, &g1, &b1); + EXPECT_EQ(0, r1); + EXPECT_EQ(0, g1); + EXPECT_EQ(0, b1); + + // white + YUVToRGBReference(240, 128, 128, &r0, &g0, &b0); + EXPECT_EQ(255, r0); + EXPECT_EQ(255, g0); + EXPECT_EQ(255, b0); + + YUVToRGB(240, 128, 128, &r1, &g1, &b1); + EXPECT_EQ(255, r1); + EXPECT_EQ(255, g1); + EXPECT_EQ(255, b1); + + // grey + YUVToRGBReference(128, 128, 128, &r0, &g0, &b0); + EXPECT_EQ(130, r0); + EXPECT_EQ(130, g0); + EXPECT_EQ(130, b0); + + YUVToRGB(128, 128, 128, &r1, &g1, &b1); + EXPECT_EQ(130, r1); + EXPECT_EQ(130, g1); + EXPECT_EQ(130, b1); + + + for (int y = 0; y < 256; ++y) { + YUVToRGBReference(y, 128, 128, &r0, &g0, &b0); + YUVToRGB(y, 128, 128, &r1, &g1, &b1); + YToRGB(y, &r2, &g2, &b2); + EXPECT_EQ(r0, r1); + EXPECT_EQ(g0, g1); + EXPECT_EQ(b0, b1); + EXPECT_EQ(r0, r2); + EXPECT_EQ(g0, g2); + EXPECT_EQ(b0, b2); + } +} + +static void PrintHistogram(int rh[256], int gh[256], int bh[256]) { + int i; + printf("hist"); + for (i = 0; i < 256; ++i) { + if (rh[i] || gh[i] || bh[i]) { + printf("\t%8d", i - 128); + } + } + printf("\nred"); + for (i = 0; i < 256; ++i) { + if (rh[i] || gh[i] || bh[i]) { + printf("\t%8d", rh[i]); + } + } + printf("\ngreen"); + for (i = 0; i < 256; ++i) { + if (rh[i] || gh[i] || bh[i]) { + printf("\t%8d", gh[i]); + } + } + printf("\nblue"); + for (i = 0; i < 256; ++i) { + if (rh[i] || gh[i] || bh[i]) { + printf("\t%8d", bh[i]); + } + } + printf("\n"); +} + +TEST_F(LibYUVColorTest, TestFullYUV) { + int rh[256] = { 0, }, gh[256] = { 0, }, bh[256] = { 0, }; + for (int u = 0; u < 256; ++u) { + for (int v = 0; v < 256; ++v) { + for (int y2 = 0; y2 < 256; ++y2) { + int r0, g0, b0, r1, g1, b1; + int y = RANDOM256(y2); + YUVToRGBReference(y, u, v, &r0, &g0, &b0); + YUVToRGB(y, u, v, &r1, &g1, &b1); + EXPECT_NEAR(r0, r1, ERROR_R); + EXPECT_NEAR(g0, g1, ERROR_G); + EXPECT_NEAR(b0, b1, ERROR_B); + ++rh[r1 - r0 + 128]; + ++gh[g1 - g0 + 128]; + ++bh[b1 - b0 + 128]; + } + } + } + PrintHistogram(rh, gh, bh); +} + +TEST_F(LibYUVColorTest, TestFullYUVJ) { + int rh[256] = { 0, }, gh[256] = { 0, }, bh[256] = { 0, }; + for (int u = 0; u < 256; ++u) { + for (int v = 0; v < 256; ++v) { + for (int y2 = 0; y2 < 256; ++y2) { + int r0, g0, b0, r1, g1, b1; + int y = RANDOM256(y2); + YUVJToRGBReference(y, u, v, &r0, &g0, &b0); + YUVJToRGB(y, u, v, &r1, &g1, &b1); + EXPECT_NEAR(r0, r1, 1); + EXPECT_NEAR(g0, g1, 1); + EXPECT_NEAR(b0, b1, 1); + ++rh[r1 - r0 + 128]; + ++gh[g1 - g0 + 128]; + ++bh[b1 - b0 + 128]; + } + } + } + PrintHistogram(rh, gh, bh); +} + +TEST_F(LibYUVColorTest, TestGreyYUVJ) { + int r0, g0, b0, r1, g1, b1, r2, g2, b2; + + // black + YUVJToRGBReference(0, 128, 128, &r0, &g0, &b0); + EXPECT_EQ(0, r0); + EXPECT_EQ(0, g0); + EXPECT_EQ(0, b0); + + YUVJToRGB(0, 128, 128, &r1, &g1, &b1); + EXPECT_EQ(0, r1); + EXPECT_EQ(0, g1); + EXPECT_EQ(0, b1); + + // white + YUVJToRGBReference(255, 128, 128, &r0, &g0, &b0); + EXPECT_EQ(255, r0); + EXPECT_EQ(255, g0); + EXPECT_EQ(255, b0); + + YUVJToRGB(255, 128, 128, &r1, &g1, &b1); + EXPECT_EQ(255, r1); + EXPECT_EQ(255, g1); + EXPECT_EQ(255, b1); + + // grey + YUVJToRGBReference(128, 128, 128, &r0, &g0, &b0); + EXPECT_EQ(128, r0); + EXPECT_EQ(128, g0); + EXPECT_EQ(128, b0); + + YUVJToRGB(128, 128, 128, &r1, &g1, &b1); + EXPECT_EQ(128, r1); + EXPECT_EQ(128, g1); + EXPECT_EQ(128, b1); + + for (int y = 0; y < 256; ++y) { + YUVJToRGBReference(y, 128, 128, &r0, &g0, &b0); + YUVJToRGB(y, 128, 128, &r1, &g1, &b1); + YJToRGB(y, &r2, &g2, &b2); + EXPECT_EQ(r0, r1); + EXPECT_EQ(g0, g1); + EXPECT_EQ(b0, b1); + EXPECT_EQ(r0, r2); + EXPECT_EQ(g0, g2); + EXPECT_EQ(b0, b2); + } +} + +} // namespace libyuv |