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      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_NET_RTP_SENDER_RTP_SENDER_H_
      8 #define MEDIA_CAST_NET_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 "media/cast/cast_config.h"
     17 #include "media/cast/cast_environment.h"
     18 #include "media/cast/net/rtp_sender/packet_storage/packet_storage.h"
     19 #include "media/cast/net/rtp_sender/rtp_packetizer/rtp_packetizer.h"
     20 #include "media/cast/net/rtp_sender/rtp_packetizer/rtp_packetizer_config.h"
     21 
     22 namespace media {
     23 namespace cast {
     24 
     25 class PacedPacketSender;
     26 struct RtcpSenderInfo;
     27 
     28 // This object is only called from the main cast thread.
     29 // This class handles splitting encoded audio and video frames into packets and
     30 // add an RTP header to each packet. The sent packets are stored until they are
     31 // acknowledged by the remote peer or timed out.
     32 class RtpSender {
     33  public:
     34   RtpSender(scoped_refptr<CastEnvironment> cast_environment,
     35             const AudioSenderConfig* audio_config,
     36             const VideoSenderConfig* video_config,
     37             PacedPacketSender* transport);
     38 
     39   ~RtpSender();
     40 
     41   // The video_frame objects ownership is handled by the main cast thread.
     42   void IncomingEncodedVideoFrame(const EncodedVideoFrame* video_frame,
     43                                  const base::TimeTicks& capture_time);
     44 
     45   // The audio_frame objects ownership is handled by the main cast thread.
     46   void IncomingEncodedAudioFrame(const EncodedAudioFrame* audio_frame,
     47                                  const base::TimeTicks& recorded_time);
     48 
     49   void ResendPackets(const MissingFramesAndPacketsMap& missing_packets);
     50 
     51   void RtpStatistics(const base::TimeTicks& now, RtcpSenderInfo* sender_info);
     52 
     53  private:
     54   void UpdateSequenceNumber(std::vector<uint8>* packet);
     55 
     56   scoped_refptr<CastEnvironment> cast_environment_;
     57   RtpPacketizerConfig config_;
     58   scoped_ptr<RtpPacketizer> packetizer_;
     59   scoped_ptr<PacketStorage> storage_;
     60   PacedPacketSender* transport_;
     61 };
     62 
     63 }  // namespace cast
     64 }  // namespace media
     65 
     66 #endif  // MEDIA_CAST_NET_RTP_SENDER_RTP_SENDER_H_
     67