Moving src/webrtc into src/.

In order to eliminate the WebRTC Subtree mirror in Chromium, 
WebRTC is moving the content of the src/webrtc directory up
to the src/ directory.

NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
TBR=tommi@webrtc.org

Bug: chromium:611808
Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38
Reviewed-on: https://webrtc-review.googlesource.com/1560
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#19845}

modules/rtp_rtcp/include/receive_statistics.h

@@ -0,0 +1,95 @@
+/*
+ *  Copyright (c) 2013 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_RTP_RTCP_INCLUDE_RECEIVE_STATISTICS_H_
+#define WEBRTC_MODULES_RTP_RTCP_INCLUDE_RECEIVE_STATISTICS_H_
+
+#include <map>
+#include <vector>
+
+#include "webrtc/modules/include/module.h"
+#include "webrtc/modules/include/module_common_types.h"
+#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/report_block.h"
+#include "webrtc/typedefs.h"
+
+namespace webrtc {
+
+class Clock;
+
+class ReceiveStatisticsProvider {
+ public:
+  virtual ~ReceiveStatisticsProvider() = default;
+  // Collects receive statistic in a form of rtcp report blocks.
+  // Returns at most |max_blocks| report blocks.
+  virtual std::vector<rtcp::ReportBlock> RtcpReportBlocks(
+      size_t max_blocks) = 0;
+};
+
+class StreamStatistician {
+ public:
+  virtual ~StreamStatistician();
+
+  virtual bool GetStatistics(RtcpStatistics* statistics, bool reset) = 0;
+  virtual void GetDataCounters(size_t* bytes_received,
+                               uint32_t* packets_received) const = 0;
+
+  // Gets received stream data counters (includes reset counter values).
+  virtual void GetReceiveStreamDataCounters(
+      StreamDataCounters* data_counters) const = 0;
+
+  virtual uint32_t BitrateReceived() const = 0;
+
+  // Returns true if the packet with RTP header |header| is likely to be a
+  // retransmitted packet, false otherwise.
+  virtual bool IsRetransmitOfOldPacket(const RTPHeader& header,
+                                       int64_t min_rtt) const = 0;
+
+  // Returns true if |sequence_number| is received in order, false otherwise.
+  virtual bool IsPacketInOrder(uint16_t sequence_number) const = 0;
+};
+
+typedef std::map<uint32_t, StreamStatistician*> StatisticianMap;
+
+class ReceiveStatistics : public ReceiveStatisticsProvider {
+ public:
+  ~ReceiveStatistics() override = default;
+
+  static ReceiveStatistics* Create(Clock* clock);
+
+  // Updates the receive statistics with this packet.
+  virtual void IncomingPacket(const RTPHeader& rtp_header,
+                              size_t packet_length,
+                              bool retransmitted) = 0;
+
+  // Increment counter for number of FEC packets received.
+  virtual void FecPacketReceived(const RTPHeader& header,
+                                 size_t packet_length) = 0;
+
+  // Returns a map of all statisticians which have seen an incoming packet
+  // during the last two seconds.
+  virtual StatisticianMap GetActiveStatisticians() const = 0;
+
+  // Returns a pointer to the statistician of an ssrc.
+  virtual StreamStatistician* GetStatistician(uint32_t ssrc) const = 0;
+
+  // Sets the max reordering threshold in number of packets.
+  virtual void SetMaxReorderingThreshold(int max_reordering_threshold) = 0;
+
+  // Called on new RTCP stats creation.
+  virtual void RegisterRtcpStatisticsCallback(
+      RtcpStatisticsCallback* callback) = 0;
+
+  // Called on new RTP stats creation.
+  virtual void RegisterRtpStatisticsCallback(
+      StreamDataCountersCallback* callback) = 0;
+};
+
+}  // namespace webrtc
+#endif  // WEBRTC_MODULES_RTP_RTCP_INCLUDE_RECEIVE_STATISTICS_H_