Structure of BBR's implementation,some main classes and functions which are going to be used

webrtc/modules/remote_bitrate_estimator/test/estimators/bbr.cc

Index: webrtc/modules/remote_bitrate_estimator/test/estimators/bbr.cc
diff --git a/webrtc/modules/remote_bitrate_estimator/test/estimators/bbr.cc b/webrtc/modules/remote_bitrate_estimator/test/estimators/bbr.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0d4dfb4c4b06cc9cba5af3bd7b2f006b29cff23a
--- /dev/null
+++ b/webrtc/modules/remote_bitrate_estimator/test/estimators/bbr.cc
@@ -0,0 +1,79 @@
+/*
+ *  Copyright (c) 2017 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/modules/remote_bitrate_estimator/test/estimators/bbr.h"
+
+#include <time.h>
+#include <algorithm>
+#include <utility>
+
+#include "webrtc/base/logging.h"
+#include "webrtc/modules/congestion_controller/delay_based_bwe.h"
+#include "webrtc/modules/remote_bitrate_estimator/test/bwe_test_logging.h"
+
+namespace webrtc {
+namespace testing {
+namespace bwe {
+BbrBweSender::BbrBweSender() : BweSender() {
+  // Initially enter Startup mode.
+  EnterStartup();
+}
+
+BbrBweSender::~BbrBweSender() {}
+
+int BbrBweSender::GetFeedbackIntervalMs() const {
+  return 0;
+}
+
+void BbrBweSender::GiveFeedback(const FeedbackPacket& feedback) {}
+
+bool BbrBweSender::UpdateBandwidthAndMinRtt() {
+  return false;
+}
+
+void BbrBweSender::EnterStartup() {}
+
+void BbrBweSender::TryExitingStartup() {}
+
+void BbrBweSender::TryExitingDrain(int64_t now) {}
+
+void BbrBweSender::EnterProbeBw(int64_t now) {}
+
+void BbrBweSender::TryUpdatingCyclePhase(int64_t now) {}
+
+void BbrBweSender::EnterProbeRtt(int64_t now) {}
+
+void BbrBweSender::TryExitingProbeRtt(int64_t now) {}
+
+int64_t BbrBweSender::TimeUntilNextProcess() {
+  return 100;
+}
+
+void BbrBweSender::OnPacketsSent(const Packets& packets) {}
+
+void BbrBweSender::Process() {}
+
+BbrBweReceiver::BbrBweReceiver(int flow_id)
+    : BweReceiver(flow_id, kReceivingRateTimeWindowMs),
+      clock_(0),
+      packet_feedbacks_() {}
+
+BbrBweReceiver::~BbrBweReceiver() {}
+
+void BbrBweReceiver::ReceivePacket(int64_t arrival_time_ms,
+                                   const MediaPacket& media_packet) {}
+
+FeedbackPacket* BbrBweReceiver::GetFeedback(int64_t now_ms) {
+  return nullptr;
+}
+}  // namespace bwe
+}  // namespace testing
+}  // namespace webrtc