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Diffstat (limited to 'third_party/aom/test/acm_random.h')
-rw-r--r-- | third_party/aom/test/acm_random.h | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/third_party/aom/test/acm_random.h b/third_party/aom/test/acm_random.h deleted file mode 100644 index 0a8317fd5..000000000 --- a/third_party/aom/test/acm_random.h +++ /dev/null @@ -1,84 +0,0 @@ -/* - * Copyright (c) 2016, Alliance for Open Media. All rights reserved - * - * This source code is subject to the terms of the BSD 2 Clause License and - * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License - * was not distributed with this source code in the LICENSE file, you can - * obtain it at www.aomedia.org/license/software. If the Alliance for Open - * Media Patent License 1.0 was not distributed with this source code in the - * PATENTS file, you can obtain it at www.aomedia.org/license/patent. - */ - -#ifndef AOM_TEST_ACM_RANDOM_H_ -#define AOM_TEST_ACM_RANDOM_H_ - -#include "third_party/googletest/src/googletest/include/gtest/gtest.h" - -#include "aom/aom_integer.h" - -namespace libaom_test { - -class ACMRandom { - public: - ACMRandom() : random_(DeterministicSeed()) {} - - explicit ACMRandom(int seed) : random_(seed) {} - - void Reset(int seed) { random_.Reseed(seed); } - - uint32_t Rand31(void) { - return random_.Generate(testing::internal::Random::kMaxRange); - } - - uint16_t Rand16(void) { - const uint32_t value = - random_.Generate(testing::internal::Random::kMaxRange); - return (value >> 15) & 0xffff; - } - - int16_t Rand15Signed(void) { - const uint32_t value = - random_.Generate(testing::internal::Random::kMaxRange); - return (value >> 17) & 0xffff; - } - - uint16_t Rand12(void) { - const uint32_t value = - random_.Generate(testing::internal::Random::kMaxRange); - // There's a bit more entropy in the upper bits of this implementation. - return (value >> 19) & 0xfff; - } - - int16_t Rand9Signed(void) { - // Use 9 bits: values between 255 (0x0FF) and -256 (0x100). - const uint32_t value = random_.Generate(512); - return static_cast<int16_t>(value) - 256; - } - - uint8_t Rand8(void) { - const uint32_t value = - random_.Generate(testing::internal::Random::kMaxRange); - // There's a bit more entropy in the upper bits of this implementation. - return (value >> 23) & 0xff; - } - - uint8_t Rand8Extremes(void) { - // Returns a random value near 0 or near 255, to better exercise - // saturation behavior. - const uint8_t r = Rand8(); - return r < 128 ? r << 4 : r >> 4; - } - - int PseudoUniform(int range) { return random_.Generate(range); } - - int operator()(int n) { return PseudoUniform(n); } - - static int DeterministicSeed(void) { return 0xbaba; } - - private: - testing::internal::Random random_; -}; - -} // namespace libaom_test - -#endif // AOM_TEST_ACM_RANDOM_H_ |