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#include <gtest/gtest.h>
#include <math.h>
#include "svc_enc_golomb.h"
#include "macros.h"
using namespace WelsEnc;
const double g_kdLog2Factor = 1.0 / log (2.0);
TEST (UeExpGolombTest, TestBsSizeUeLt256) {
uint32_t uiInVal = 0;
for (; uiInVal < 256; ++ uiInVal) {
const uint32_t uiActVal = BsSizeUE (uiInVal);
const int32_t m = static_cast<int32_t> (log ((uiInVal + 1) * 1.0) * g_kdLog2Factor + 1e-6);
const uint32_t uiExpVal = (m << 1) + 1;
EXPECT_EQ (uiActVal, uiExpVal);
}
}
TEST (UeExpGolombTest, TestBsSizeUeRangeFrom256To65534) {
uint32_t uiInVal = 0x100;
for (; uiInVal < 0xFFFF; ++ uiInVal) {
const uint32_t uiActVal = BsSizeUE (uiInVal);
const int32_t m = static_cast<int32_t> (log ((uiInVal + 1) * 1.0) * g_kdLog2Factor + 1e-6);
const uint32_t uiExpVal = (m << 1) + 1;
EXPECT_EQ (uiActVal, uiExpVal);
}
}
TEST (UeExpGolombTest, TestBsSizeUeRangeFrom65535ToPlus256) {
uint32_t uiInVal = 0xFFFF;
const uint32_t uiCountBase = 256;
const uint32_t uiInValEnd = uiInVal + uiCountBase;
for (; uiInVal < uiInValEnd; ++ uiInVal) {
const uint32_t uiActVal = BsSizeUE (uiInVal);
// float precision issue in case use math::log
const int32_t m = WELS_LOG2 (1 + uiInVal);
const uint32_t uiExpVal = (m << 1) + 1;
EXPECT_EQ (uiActVal, uiExpVal);
}
}
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