src/media/cast/transport/transport_video_sender.h

   1 // Copyright 2014 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 #ifndef MEDIA_CAST_TRANSPORT_TRANSPORT_VIDEO_SENDER_H_
   6 #define MEDIA_CAST_TRANSPORT_TRANSPORT_VIDEO_SENDER_H_
   7
   8 #include "base/callback.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/threading/non_thread_safe.h"
  12 #include "base/time/tick_clock.h"
  13 #include "media/cast/transport/cast_transport_config.h"
  14 #include "media/cast/transport/rtp_sender/rtp_sender.h"
  15
  16 namespace crypto {
  17 class Encryptor;
  18 class SymmetricKey;
  19 }
  20
  21 namespace media {
  22 class VideoFrame;
  23
  24 namespace cast {
  25 namespace transport {
  26
  27 class PacedSender;
  28
  29 // Not thread safe. Only called from the main cast transport thread.
  30 // This class owns all objects related to sending coded video, objects that
  31 // encrypt, create RTP packets and send to network.
  32 class TransportVideoSender : public base::NonThreadSafe {
  33  public:
  34   TransportVideoSender(const CastTransportConfig& config,
  35                        base::TickClock* clock,
  36                        PacedSender* const paced_packet_sender);
  37
  38   virtual ~TransportVideoSender();
  39
  40   // Handles the encoded video frames to be processed.
  41   // Frames will be encrypted, packetized and transmitted to the network.
  42   void InsertCodedVideoFrame(const EncodedVideoFrame* coded_frame,
  43                              const base::TimeTicks& capture_time);
  44
  45   // Retrieves video RTP statistics.
  46   void GetStatistics(const base::TimeTicks& now, RtcpSenderInfo* sender_info);
  47
  48   // Retransmision request.
  49   void ResendPackets(
  50       const MissingFramesAndPacketsMap& missing_frames_and_packets);
  51
  52   bool initialized() const { return initialized_; }
  53
  54  private:
  55   // Caller must allocate the destination |encrypted_video_frame| the data
  56   // member will be resized to hold the encrypted size.
  57   bool EncryptVideoFrame(const EncodedVideoFrame& encoded_frame,
  58                          EncodedVideoFrame* encrypted_video_frame);
  59
  60   const base::TimeDelta rtp_max_delay_;
  61
  62   RtpSender rtp_sender_;
  63   scoped_ptr<crypto::SymmetricKey> key_;
  64   scoped_ptr<crypto::Encryptor> encryptor_;
  65   std::string iv_mask_;
  66
  67   bool initialized_;
  68
  69   DISALLOW_IMPLICIT_CONSTRUCTORS(TransportVideoSender);
  70 };
  71
  72 }  // namespace transport
  73 }  // namespace cast
  74 }  // namespace media
  75
  76 #endif  // MEDIA_CAST_TRANSPORT_TRANSPORT_VIDEO_SENDER_H_