media/cast/framer/framer.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 #ifndef MEDIA_CAST_FRAMER_FRAMER_H_
   6 #define MEDIA_CAST_FRAMER_FRAMER_H_
   7
   8 #include <map>
   9
  10 #include "base/basictypes.h"
  11 #include "base/memory/linked_ptr.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/time/tick_clock.h"
  14 #include "base/time/time.h"
  15 #include "media/cast/framer/cast_message_builder.h"
  16 #include "media/cast/framer/frame_buffer.h"
  17 #include "media/cast/framer/frame_id_map.h"
  18 #include "media/cast/rtcp/rtcp.h"
  19 #include "media/cast/rtp_receiver/rtp_receiver_defines.h"
  20
  21 namespace media {
  22 namespace cast {
  23
  24 typedef std::map<uint32, linked_ptr<FrameBuffer> > FrameList;
  25
  26 class Framer {
  27  public:
  28   Framer(base::TickClock* clock,
  29          RtpPayloadFeedback* incoming_payload_feedback,
  30          uint32 ssrc,
  31          bool decoder_faster_than_max_frame_rate,
  32          int max_unacked_frames);
  33   ~Framer();
  34
  35   // Return true when receiving the last packet in a frame, creating a
  36   // complete frame. If a duplicate packet for an already complete frame is
  37   // received, the function returns false but sets |duplicate| to true.
  38   bool InsertPacket(const uint8* payload_data,
  39                     size_t payload_size,
  40                     const RtpCastHeader& rtp_header,
  41                     bool* duplicate);
  42
  43   // Extracts a complete encoded frame - will only return a complete continuous
  44   // frame.
  45   // Returns false if the frame does not exist or if the frame is not complete
  46   // within the given time frame.
  47   bool GetEncodedVideoFrame(transport::EncodedVideoFrame* video_frame,
  48                             bool* next_frame);
  49
  50   bool GetEncodedAudioFrame(transport::EncodedAudioFrame* audio_frame,
  51                             bool* next_frame);
  52
  53   void ReleaseFrame(uint32 frame_id);
  54
  55   // Reset framer state to original state and flush all pending buffers.
  56   void Reset();
  57   bool TimeToSendNextCastMessage(base::TimeTicks* time_to_send);
  58   void SendCastMessage();
  59
  60  private:
  61   const bool decoder_faster_than_max_frame_rate_;
  62   FrameList frames_;
  63   FrameIdMap frame_id_map_;
  64
  65   scoped_ptr<CastMessageBuilder> cast_msg_builder_;
  66
  67   DISALLOW_COPY_AND_ASSIGN(Framer);
  68 };
  69
  70 }  //  namespace cast
  71 }  //  namespace media
  72
  73 #endif  // MEDIA_CAST_FRAMER_FRAMER_H_