Make the BWE threshold adaptive.

webrtc/modules/remote_bitrate_estimator/test/random.h

+/*
+ *  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.
+ */
+
+#ifndef WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_TEST_RANDOM_H_
+#define WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_TEST_RANDOM_H_
+
+#include "webrtc/typedefs.h"
+#include "webrtc/base/constructormagic.h"
+
+class Random {
+ public:
+  explicit Random(uint32_t seed);
+
+  // Return pseudo random number in the interval [0.0, 1.0].
+  float Rand();
+
+  // Normal Distribution.
+  int Gaussian(int mean, int standard_deviation);
+
+  // TODO(solenberg): Random from histogram.
+  // template<typename T> int Distribution(const std::vector<T> histogram) {
+
+ private:
+  uint32_t a_;
+  uint32_t b_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(Random);
+};
+
+#endif  // WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_TEST_RANDOM_H_