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_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/net/rtcp/rtcp.h" 16 #include "media/cast/net/rtp/cast_message_builder.h" 17 #include "media/cast/net/rtp/frame_buffer.h" 18 #include "media/cast/net/rtp/rtp_receiver_defines.h" 19 20 namespace media { 21 namespace cast { 22 23 typedef std::map<uint32, linked_ptr<FrameBuffer> > FrameList; 24 25 class Framer { 26 public: 27 Framer(base::TickClock* clock, 28 RtpPayloadFeedback* incoming_payload_feedback, 29 uint32 ssrc, 30 bool decoder_faster_than_max_frame_rate, 31 int max_unacked_frames); 32 ~Framer(); 33 34 // Return true when receiving the last packet in a frame, creating a 35 // complete frame. If a duplicate packet for an already complete frame is 36 // received, the function returns false but sets |duplicate| to true. 37 bool InsertPacket(const uint8* payload_data, 38 size_t payload_size, 39 const RtpCastHeader& rtp_header, 40 bool* duplicate); 41 42 // Extracts a complete encoded frame - will only return a complete and 43 // decodable frame. Returns false if no such frames exist. 44 // |next_frame| will be set to true if the returned frame is the very 45 // next frame. |have_multiple_complete_frames| will be set to true 46 // if there are more decodadble frames available. 47 bool GetEncodedFrame(EncodedFrame* video_frame, 48 bool* next_frame, 49 bool* have_multiple_complete_frames); 50 51 // TODO(hubbe): Move this elsewhere. 52 void AckFrame(uint32 frame_id); 53 54 void ReleaseFrame(uint32 frame_id); 55 56 // Reset framer state to original state and flush all pending buffers. 57 void Reset(); 58 bool TimeToSendNextCastMessage(base::TimeTicks* time_to_send); 59 void SendCastMessage(); 60 61 bool Empty() const; 62 bool FrameExists(uint32 frame_id) const; 63 uint32 NewestFrameId() const; 64 65 void RemoveOldFrames(uint32 frame_id); 66 67 // Identifies the next frame to be released (rendered). 68 bool NextContinuousFrame(uint32* frame_id) const; 69 uint32 LastContinuousFrame() const; 70 71 bool NextFrameAllowingSkippingFrames(uint32* frame_id) const; 72 bool HaveMultipleDecodableFrames() const; 73 74 int NumberOfCompleteFrames() const; 75 void GetMissingPackets(uint32 frame_id, 76 bool last_frame, 77 PacketIdSet* missing_packets) const; 78 79 private: 80 bool ContinuousFrame(FrameBuffer* frame) const; 81 bool DecodableFrame(FrameBuffer* frame) const; 82 83 const bool decoder_faster_than_max_frame_rate_; 84 FrameList frames_; 85 scoped_ptr<CastMessageBuilder> cast_msg_builder_; 86 bool waiting_for_key_; 87 uint32 last_released_frame_; 88 uint32 newest_frame_id_; 89 90 DISALLOW_COPY_AND_ASSIGN(Framer); 91 }; 92 93 } // namespace cast 94 } // namespace media 95 96 #endif // MEDIA_CAST_FRAMER_FRAMER_H_ 97