src/media/cast/framer/cast_message_builder.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 // Handles NACK list and manages ACK.
   6
   7 #ifndef MEDIA_CAST_FRAMER_CAST_MESSAGE_BUILDER_H_
   8 #define MEDIA_CAST_FRAMER_CAST_MESSAGE_BUILDER_H_
   9
  10 #include <map>
  11
  12 #include "media/cast/framer/frame_id_map.h"
  13 #include "media/cast/rtcp/rtcp.h"
  14 #include "media/cast/rtp_receiver/rtp_receiver_defines.h"
  15
  16 namespace media {
  17 namespace cast {
  18
  19 class RtpPayloadFeedback;
  20
  21 typedef std::map<uint32, base::TimeTicks> TimeLastNackMap;
  22
  23 class CastMessageBuilder {
  24  public:
  25   CastMessageBuilder(base::TickClock* clock,
  26                      RtpPayloadFeedback* incoming_payload_feedback,
  27                      FrameIdMap* frame_id_map,
  28                      uint32 media_ssrc,
  29                      bool decoder_faster_than_max_frame_rate,
  30                      int max_unacked_frames);
  31   ~CastMessageBuilder();
  32
  33   void CompleteFrameReceived(uint32 frame_id, bool is_key_frame);
  34   bool TimeToSendNextCastMessage(base::TimeTicks* time_to_send);
  35   void UpdateCastMessage();
  36   void Reset();
  37
  38  private:
  39   bool UpdateAckMessage();
  40   void BuildPacketList();
  41   bool UpdateCastMessageInternal(RtcpCastMessage* message);
  42
  43   base::TickClock* const clock_;  // Not owned by this class.
  44   RtpPayloadFeedback* const cast_feedback_;
  45
  46   // CastMessageBuilder has only const access to the frame id mapper.
  47   const FrameIdMap* const frame_id_map_;
  48   const uint32 media_ssrc_;
  49   const bool decoder_faster_than_max_frame_rate_;
  50   const int max_unacked_frames_;
  51
  52   RtcpCastMessage cast_msg_;
  53   base::TimeTicks last_update_time_;
  54   bool waiting_for_key_frame_;
  55
  56   TimeLastNackMap time_last_nacked_map_;
  57
  58   bool slowing_down_ack_;
  59   bool acked_last_frame_;
  60   uint32 last_acked_frame_id_;
  61
  62   DISALLOW_COPY_AND_ASSIGN(CastMessageBuilder);
  63 };
  64
  65 }  // namespace cast
  66 }  // namespace media
  67
  68 #endif  //  MEDIA_CAST_FRAMER_CAST_MESSAGE_BUILDER_H_