Add TransportFeedback adapter, adapting remote feedback to bwe estiamtor

webrtc/modules/remote_bitrate_estimator/transport_feedback_adapter.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_TRANSPORT_FEEDBACK_ADAPTER_H_
+#define WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_TRANSPORT_FEEDBACK_ADAPTER_H_
+
+#include <vector>
+
+#include "webrtc/base/criticalsection.h"
+#include "webrtc/base/thread_annotations.h"
+#include "webrtc/modules/rtp_rtcp/interface/rtp_rtcp_defines.h"
+#include "webrtc/modules/interface/module_common_types.h"
+#include "webrtc/modules/remote_bitrate_estimator/include/remote_bitrate_estimator.h"
+#include "webrtc/modules/remote_bitrate_estimator/include/send_time_history.h"
+
+namespace webrtc {
+
+class ProcessThread;
+
+class TransportFeedbackAdapter : public TransportFeedbackObserver,
+                                 public CallStatsObserver,
+                                 public RemoteBitrateObserver {
+ public:
+  TransportFeedbackAdapter(RtcpBandwidthObserver* bandwidth_observer,
+                           Clock* clock,
+                           ProcessThread* process_thread);
+  virtual ~TransportFeedbackAdapter();
+
+  void OnPacketSent(uint16_t sequence_number,
+                    int64_t send_time,
+                    size_t size,
+                    bool was_paced) override;
+
+  void OnTransportFeedback(const rtcp::TransportFeedback& feedback) override;
+
+  void SetBitrateEstimator(RemoteBitrateEstimator* rbe);
+
+ private:
+  void OnReceiveBitrateChanged(const std::vector<unsigned int>& ssrcs,
+                               unsigned int bitrate) override;
+  void OnRttUpdate(int64_t avg_rtt_ms, int64_t max_rtt_ms) override;
+
+  rtc::CriticalSection lock_;
+  SendTimeHistory send_time_history_ GUARDED_BY(&lock_);
+  rtc::scoped_ptr<RtcpBandwidthObserver> rtcp_bandwidth_observer_;
+  rtc::scoped_ptr<RemoteBitrateEstimator> bitrate_estimator_;
+  ProcessThread* const process_thread_;
+  Clock* const clock_;
+  int64_t current_offset_ms_;
+  int64_t last_timestamp_us_;
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_TRANSPORT_FEEDBACK_ADAPTER_H_