Index: webrtc/test/random.cc |
diff --git a/webrtc/test/random.cc b/webrtc/test/random.cc |
deleted file mode 100644 |
index 0a82b8d72d938e327f27ebacacb8f15f2935f1a7..0000000000000000000000000000000000000000 |
--- a/webrtc/test/random.cc |
+++ /dev/null |
@@ -1,72 +0,0 @@ |
-/* |
- * Copyright (c) 2015 The WebRTC 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. |
- */ |
- |
-#include "webrtc/test/random.h" |
- |
-#include <math.h> |
- |
-#include "webrtc/base/checks.h" |
- |
-namespace webrtc { |
- |
-namespace test { |
- |
-Random::Random(uint32_t seed) : a_(0x531FDB97 ^ seed), b_(0x6420ECA8 + seed) { |
-} |
- |
-uint32_t Random::Rand(uint32_t t) { |
- // If b / 2^32 is uniform on [0,1), then b / 2^32 * (t+1) is uniform on |
- // the interval [0,t+1), so the integer part is uniform on [0,t]. |
- uint64_t result = b_ * (static_cast<uint64_t>(t) + 1); |
- result >>= 32; |
- a_ ^= b_; |
- b_ += a_; |
- return result; |
-} |
- |
-uint32_t Random::Rand(uint32_t low, uint32_t high) { |
- RTC_DCHECK(low <= high); |
- return Rand(high - low) + low; |
-} |
- |
-template <> |
-float Random::Rand<float>() { |
- const double kScale = 1.0f / (static_cast<uint64_t>(1) << 32); |
- double result = kScale * b_; |
- a_ ^= b_; |
- b_ += a_; |
- return static_cast<float>(result); |
-} |
- |
-template <> |
-bool Random::Rand<bool>() { |
- return Rand(0, 1) == 1; |
-} |
- |
-int Random::Gaussian(int mean, int standard_deviation) { |
- // Creating a Normal distribution variable from two independent uniform |
- // variables based on the Box-Muller transform, which is defined on the |
- // interval (0, 1], hence the mask+add below. |
- const double kPi = 3.14159265358979323846; |
- const double kScale = 1.0 / 0x80000000ul; |
- double u1 = kScale * ((a_ & 0x7ffffffful) + 1); |
- double u2 = kScale * ((b_ & 0x7ffffffful) + 1); |
- a_ ^= b_; |
- b_ += a_; |
- return static_cast<int>( |
- mean + standard_deviation * sqrt(-2 * log(u1)) * cos(2 * kPi * u2)); |
-} |
- |
-int Random::Exponential(float lambda) { |
- float uniform = Rand<float>(); |
- return static_cast<int>(-log(uniform) / lambda); |
-} |
-} // namespace test |
-} // namespace webrtc |