f883b42cab
Cherry-Picked the following commits: 0defd8f Changed "WebM" to "AOMedia" & "webm" to "aomedia" 54e6676 Replace "VPx" by "AVx" 5082a36 Change "Vpx" to "Avx" 7df44f1 Replace "Vp9" w/ "Av1" 967f722 Remove kVp9CodecId 828f30c Change "Vp8" to "AOM" 030b5ff AUTHORS regenerated 2524cae Add ref-mv experimental flag 016762b Change copyright notice to AOMedia form 81e5526 Replace vp9 w/ av1 9b94565 Add missing files fa8ca9f Change "vp9" to "av1" ec838b7 Convert "vp8" to "aom" 80edfa0 Change "VP9" to "AV1" d1a11fb Change "vp8" to "aom" 7b58251 Point to WebM test data dd1a5c8 Replace "VP8" with "AOM" ff00fc0 Change "VPX" to "AOM" 01dee0b Change "vp10" to "av1" in source code cebe6f0 Convert "vpx" to "aom" 17b0567 rename vp10*.mk to av1_*.mk fe5f8a8 rename files vp10_* to av1_* Change-Id: I6fc3d18eb11fc171e46140c836ad5339cf6c9419
71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
/*
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* Copyright (c) 2012 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef TEST_ACM_RANDOM_H_
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#define TEST_ACM_RANDOM_H_
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#include "third_party/googletest/src/include/gtest/gtest.h"
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#include "aom/aom_integer.h"
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namespace libaom_test {
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class ACMRandom {
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public:
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ACMRandom() : random_(DeterministicSeed()) {}
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explicit ACMRandom(int seed) : random_(seed) {}
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void Reset(int seed) { random_.Reseed(seed); }
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uint32_t Rand31(void) {
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return random_.Generate(testing::internal::Random::kMaxRange);
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}
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uint16_t Rand16(void) {
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const uint32_t value =
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random_.Generate(testing::internal::Random::kMaxRange);
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return (value >> 15) & 0xffff;
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}
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int16_t Rand9Signed(void) {
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// Use 9 bits: values between 255 (0x0FF) and -256 (0x100).
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const uint32_t value = random_.Generate(512);
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return static_cast<int16_t>(value) - 256;
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}
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uint8_t Rand8(void) {
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const uint32_t value =
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random_.Generate(testing::internal::Random::kMaxRange);
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// There's a bit more entropy in the upper bits of this implementation.
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return (value >> 23) & 0xff;
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}
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uint8_t Rand8Extremes(void) {
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// Returns a random value near 0 or near 255, to better exercise
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// saturation behavior.
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const uint8_t r = Rand8();
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return r < 128 ? r << 4 : r >> 4;
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}
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int PseudoUniform(int range) { return random_.Generate(range); }
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int operator()(int n) { return PseudoUniform(n); }
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static int DeterministicSeed(void) { return 0xbaba; }
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private:
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testing::internal::Random random_;
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};
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} // namespace libaom_test
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#endif // TEST_ACM_RANDOM_H_
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