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libyuv
Commit 8f152605 authored by fbarchard@google.com's avatar fbarchard@google.com
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test for cast and clamp performance. 

BUG=none
TESTED=libyuv unittest added to benchmark and confirm behavior of cast
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/44649004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1323 16f28f9a-4ce2-e073-06de-1de4eb20be90
parent 685b92b0
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Showing with 87 additions and 2 deletions
unit_test/color_test.cc
View file @ 8f152605
......@@ -183,6 +183,10 @@ static void YToRGB(int y, int* r, int* g, int* b) {
*r = orig_pixels[2];
}
// Pick a method for clamping.
#define CLAMPMETHOD_IF 1
#if defined(CLAMPMETHOD_IF)
static int RoundToByte(double f) {
int i = static_cast<int>(f + 0.5);
if (i < 0) {
......@@ -193,6 +197,70 @@ static int RoundToByte(double f) {
}
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(double f) {
return clamptable[static_cast<int>(f + 0.5) + 276];
}
#elif defined(CLAMPMETHOD_TERNARY)
static int RoundToByte(float f) {
int i = static_cast<int>(f + 0.5);
return (i < 0) ? 0 : ((i > 255) ? 255 : i);
}
#elif defined(CLAMPMETHOD_MASK)
static int RoundToByte(float f) {
int i = static_cast<int>(f + 0.5);
i = ((-(i) >> 31) & (i)); // clamp to 0.
return (((255 - (i)) >> 31) | (i)) & 255; // clamp to 255.
}
#endif
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);
......@@ -200,6 +268,25 @@ static void YUVToRGBReference(int y, int u, int v, int* r, int* g, int* b) {
*b = RoundToByte((y - 16) * 1.164 + (u - 128) * 2.018);
}
#define RANDOM256(s) ((s & 1) ? ((s >> 1) ^ 0xb8) : (s >> 1))
TEST_F(libyuvTest, TestRoundToByte) {
int allb = 0;
for (int i = 0; i < benchmark_iterations_; ++i) {
for (int u2 = 0; u2 < 256; ++u2) {
for (int v2 = 0; v2 < 256; ++v2) {
for (int y2 = 0; y2 < 256; ++y2) {
int y = RANDOM256(y2);
int b = RoundToByte(y * 810.33 - 257);
allb |= b;
}
}
}
}
EXPECT_GE(allb, 0);
EXPECT_LE(allb, 255);
}
TEST_F(libyuvTest, TestYUV) {
int r0, g0, b0, r1, g1, b1;
......@@ -296,8 +383,6 @@ TEST_F(libyuvTest, TestGreyYUV) {
}
}
#define RANDOM256(s) ((s & 1) ? ((s >> 1) ^ 0xb8) : (s >> 1))
TEST_F(libyuvTest, TestFullYUV) {
int i;
int rh[256] = { 0, }, gh[256] = { 0, }, bh[256] = { 0, };
......
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