Adds a modified copy of talk/base to webrtc/base. It is the first step in migrating talk/base to webrtc/base.

BUG=N/A R=andrew@webrtc.org, wu@webrtc.org Review URL: https://webrtc-codereview.appspot.com/12199004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@6107 4adac7df-926f-26a2-2b94-8c16560cd09d
2014-05-12 18:03:09 +00:00
parent f3a5e6afc4
commit 2c7d1b39b9
386 changed files with 84973 additions and 6 deletions
--- a/webrtc/base/bandwidthsmoother_unittest.cc
+++ b/webrtc/base/bandwidthsmoother_unittest.cc
@ -0,0 +1,116 @@
+/*
+ *  Copyright 2011 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 <limits.h>
+
+#include "webrtc/base/bandwidthsmoother.h"
+#include "webrtc/base/gunit.h"
+
+namespace rtc {
+
+static const int kTimeBetweenIncrease = 10;
+static const double kPercentIncrease = 1.1;
+static const size_t kSamplesCountToAverage = 2;
+static const double kMinSampleCountPercent = 1.0;
+
+TEST(BandwidthSmootherTest, TestSampleIncrease) {
+  BandwidthSmoother mon(1000,  // initial_bandwidth_guess
+                        kTimeBetweenIncrease,
+                        kPercentIncrease,
+                        kSamplesCountToAverage,
+                        kMinSampleCountPercent);
+
+  int bandwidth_sample = 1000;
+  EXPECT_EQ(bandwidth_sample, mon.get_bandwidth_estimation());
+  bandwidth_sample =
+      static_cast<int>(bandwidth_sample * kPercentIncrease);
+  EXPECT_FALSE(mon.Sample(9, bandwidth_sample));
+  EXPECT_TRUE(mon.Sample(10, bandwidth_sample));
+  EXPECT_EQ(bandwidth_sample, mon.get_bandwidth_estimation());
+  int next_expected_est =
+      static_cast<int>(bandwidth_sample * kPercentIncrease);
+  bandwidth_sample *= 2;
+  EXPECT_TRUE(mon.Sample(20, bandwidth_sample));
+  EXPECT_EQ(next_expected_est, mon.get_bandwidth_estimation());
+}
+
+TEST(BandwidthSmootherTest, TestSampleIncreaseFromZero) {
+  BandwidthSmoother mon(0,  // initial_bandwidth_guess
+                        kTimeBetweenIncrease,
+                        kPercentIncrease,
+                        kSamplesCountToAverage,
+                        kMinSampleCountPercent);
+
+  const int kBandwidthSample = 1000;
+  EXPECT_EQ(0, mon.get_bandwidth_estimation());
+  EXPECT_FALSE(mon.Sample(9, kBandwidthSample));
+  EXPECT_TRUE(mon.Sample(10, kBandwidthSample));
+  EXPECT_EQ(kBandwidthSample, mon.get_bandwidth_estimation());
+}
+
+TEST(BandwidthSmootherTest, TestSampleDecrease) {
+  BandwidthSmoother mon(1000,  // initial_bandwidth_guess
+                        kTimeBetweenIncrease,
+                        kPercentIncrease,
+                        kSamplesCountToAverage,
+                        kMinSampleCountPercent);
+
+  const int kBandwidthSample = 999;
+  EXPECT_EQ(1000, mon.get_bandwidth_estimation());
+  EXPECT_FALSE(mon.Sample(1, kBandwidthSample));
+  EXPECT_EQ(1000, mon.get_bandwidth_estimation());
+  EXPECT_TRUE(mon.Sample(2, kBandwidthSample));
+  EXPECT_EQ(kBandwidthSample, mon.get_bandwidth_estimation());
+}
+
+TEST(BandwidthSmootherTest, TestSampleTooFewSamples) {
+  BandwidthSmoother mon(1000,  // initial_bandwidth_guess
+                        kTimeBetweenIncrease,
+                        kPercentIncrease,
+                        10,  // 10 samples.
+                        0.5);  // 5 min samples.
+
+  const int kBandwidthSample = 500;
+  EXPECT_EQ(1000, mon.get_bandwidth_estimation());
+  EXPECT_FALSE(mon.Sample(1, kBandwidthSample));
+  EXPECT_FALSE(mon.Sample(2, kBandwidthSample));
+  EXPECT_FALSE(mon.Sample(3, kBandwidthSample));
+  EXPECT_FALSE(mon.Sample(4, kBandwidthSample));
+  EXPECT_EQ(1000, mon.get_bandwidth_estimation());
+  EXPECT_TRUE(mon.Sample(5, kBandwidthSample));
+  EXPECT_EQ(kBandwidthSample, mon.get_bandwidth_estimation());
+}
+
+TEST(BandwidthSmootherTest, TestSampleRollover) {
+  const int kHugeBandwidth = 2000000000;  // > INT_MAX/1.1
+  BandwidthSmoother mon(kHugeBandwidth,
+                        kTimeBetweenIncrease,
+                        kPercentIncrease,
+                        kSamplesCountToAverage,
+                        kMinSampleCountPercent);
+
+  EXPECT_FALSE(mon.Sample(10, INT_MAX));
+  EXPECT_FALSE(mon.Sample(11, INT_MAX));
+  EXPECT_EQ(kHugeBandwidth, mon.get_bandwidth_estimation());
+}
+
+TEST(BandwidthSmootherTest, TestSampleNegative) {
+  BandwidthSmoother mon(1000,  // initial_bandwidth_guess
+                        kTimeBetweenIncrease,
+                        kPercentIncrease,
+                        kSamplesCountToAverage,
+                        kMinSampleCountPercent);
+
+  EXPECT_FALSE(mon.Sample(10, -1));
+  EXPECT_FALSE(mon.Sample(11, -1));
+  EXPECT_EQ(1000, mon.get_bandwidth_estimation());
+}
+
+}  // namespace rtc