src/media/cast/transport/rtp_sender/rtp_sender.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // This file contains the interface to the cast RTP sender.
   6
   7 #ifndef MEDIA_CAST_TRANSPORT_RTP_SENDER_RTP_SENDER_H_
   8 #define MEDIA_CAST_TRANSPORT_RTP_SENDER_RTP_SENDER_H_
   9
  10 #include <map>
  11 #include <set>
  12
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/time/tick_clock.h"
  15 #include "base/time/time.h"
  16 #include "base/memory/weak_ptr.h"
  17 #include "media/cast/cast_config.h"
  18 #include "media/cast/cast_environment.h"
  19 #include "media/cast/transport/cast_transport_defines.h"
  20 #include "media/cast/transport/cast_transport_sender.h"
  21 #include "media/cast/transport/pacing/paced_sender.h"
  22 #include "media/cast/transport/rtp_sender/packet_storage/packet_storage.h"
  23 #include "media/cast/transport/rtp_sender/rtp_packetizer/rtp_packetizer.h"
  24
  25 namespace media {
  26 namespace cast {
  27 namespace transport {
  28
  29 // This object is only called from the main cast thread.
  30 // This class handles splitting encoded audio and video frames into packets and
  31 // add an RTP header to each packet. The sent packets are stored until they are
  32 // acknowledged by the remote peer or timed out.
  33 class RtpSender : public base::SupportsWeakPtr<RtpSender>{
  34  public:
  35   RtpSender(base::TickClock* clock,
  36             const CastTransportConfig& config,
  37             bool is_audio,
  38             const scoped_refptr<base::TaskRunner>& transport_task_runner,
  39             PacedSender* const transport);
  40
  41   ~RtpSender();
  42
  43   // The video_frame objects ownership is handled by the main cast thread.
  44   void IncomingEncodedVideoFrame(const EncodedVideoFrame* video_frame,
  45                                  const base::TimeTicks& capture_time);
  46
  47   // The audio_frame objects ownership is handled by the main cast thread.
  48   void IncomingEncodedAudioFrame(const EncodedAudioFrame* audio_frame,
  49                                  const base::TimeTicks& recorded_time);
  50
  51   void ResendPackets(const MissingFramesAndPacketsMap& missing_packets);
  52
  53   // Set the callback on which RTP statistics data will be returned. Calling
  54   // this function would start a timer that would schedule the callback in
  55   // a constant interval.
  56   void SubscribeRtpStatsCallback(const CastTransportRtpStatistics& callback);
  57
  58  private:
  59   void ScheduleNextStatsReport();
  60   void RtpStatistics();
  61   void UpdateSequenceNumber(Packet* packet);
  62
  63   RtpPacketizerConfig config_;
  64   scoped_ptr<RtpPacketizer> packetizer_;
  65   scoped_ptr<PacketStorage> storage_;
  66   PacedSender* const transport_;
  67   CastTransportRtpStatistics stats_callback_;
  68   scoped_refptr<base::TaskRunner> transport_task_runner_;
  69
  70   DISALLOW_COPY_AND_ASSIGN(RtpSender);
  71 };
  72
  73 }  // namespace transport
  74 }  // namespace cast
  75 }  // namespace media
  76
  77 #endif  // MEDIA_CAST_TRANSPORT_RTP_SENDER_RTP_SENDER_H_