c4195e0eb8
the one from gtest in this case: testing::internal::Random. this will make the tests deterministic between platforms. addresses issue #568. Change-Id: I5a8a92f5c33f52cb0a219c1dd3d02335acbbf163
56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
/*
|
|
* Copyright (c) 2012 The WebM 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.
|
|
*/
|
|
|
|
#ifndef LIBVPX_TEST_ACM_RANDOM_H_
|
|
#define LIBVPX_TEST_ACM_RANDOM_H_
|
|
|
|
#include "third_party/googletest/src/include/gtest/gtest.h"
|
|
|
|
#include "vpx/vpx_integer.h"
|
|
|
|
namespace libvpx_test {
|
|
|
|
class ACMRandom {
|
|
public:
|
|
ACMRandom() : random_(DeterministicSeed()) {}
|
|
|
|
explicit ACMRandom(int seed) : random_(seed) {}
|
|
|
|
void Reset(int seed) {
|
|
random_.Reseed(seed);
|
|
}
|
|
|
|
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 >> 24) & 0xff;
|
|
}
|
|
|
|
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 libvpx_test
|
|
|
|
#endif // LIBVPX_TEST_ACM_RANDOM_H_
|