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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 #ifndef MEDIA_CAST_TRANSPORT_RTP_SENDER_RTP_PACKETIZER_RTP_PACKETIZER_H_ | |
6 #define MEDIA_CAST_TRANSPORT_RTP_SENDER_RTP_PACKETIZER_RTP_PACKETIZER_H_ | |
7 | |
8 #include <cmath> | |
9 #include <list> | |
10 #include <map> | |
11 | |
12 #include "base/time/time.h" | |
13 #include "media/cast/transport/rtp_sender/packet_storage/packet_storage.h" | |
14 | |
15 namespace base { | |
16 class TickClock; | |
17 } | |
18 | |
19 namespace media { | |
20 namespace cast { | |
21 | |
22 namespace transport { | |
23 | |
24 class PacedSender; | |
25 | |
26 struct RtpPacketizerConfig { | |
27 RtpPacketizerConfig(); | |
28 ~RtpPacketizerConfig(); | |
29 | |
30 // General. | |
31 int payload_type; | |
32 uint16 max_payload_length; | |
33 uint16 sequence_number; | |
34 | |
35 // SSRC. | |
36 unsigned int ssrc; | |
37 }; | |
38 | |
39 // This object is only called from the main cast thread. | |
40 // This class break encoded audio and video frames into packets and add an RTP | |
41 // header to each packet. | |
42 class RtpPacketizer { | |
43 public: | |
44 RtpPacketizer(PacedSender* const transport, | |
45 PacketStorage* packet_storage, | |
46 RtpPacketizerConfig rtp_packetizer_config); | |
47 ~RtpPacketizer(); | |
48 | |
49 void SendFrameAsPackets(const EncodedFrame& frame); | |
50 | |
51 // Return the next sequence number, and increment by one. Enables unique | |
52 // incremental sequence numbers for every packet (including retransmissions). | |
53 uint16 NextSequenceNumber(); | |
54 | |
55 size_t send_packet_count() const { return send_packet_count_; } | |
56 size_t send_octet_count() const { return send_octet_count_; } | |
57 | |
58 private: | |
59 void BuildCommonRTPheader(Packet* packet, bool marker_bit, uint32 time_stamp); | |
60 | |
61 RtpPacketizerConfig config_; | |
62 PacedSender* const transport_; // Not owned by this class. | |
63 PacketStorage* packet_storage_; | |
64 | |
65 uint16 sequence_number_; | |
66 uint32 rtp_timestamp_; | |
67 uint16 packet_id_; | |
68 | |
69 size_t send_packet_count_; | |
70 size_t send_octet_count_; | |
71 }; | |
72 | |
73 } // namespace transport | |
74 } // namespace cast | |
75 } // namespace media | |
76 | |
77 #endif // MEDIA_CAST_TRANSPORT_RTP_SENDER_RTP_PACKETIZER_RTP_PACKETIZER_H_ | |
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