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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_RTCP_RTCP_SENDER_H_ | |
| 6 #define MEDIA_CAST_RTCP_RTCP_SENDER_H_ | |
| 7 | |
| 8 #include <deque> | |
| 9 #include <list> | |
| 10 #include <string> | |
| 11 | |
| 12 #include "media/cast/cast_config.h" | |
| 13 #include "media/cast/cast_defines.h" | |
| 14 #include "media/cast/rtcp/receiver_rtcp_event_subscriber.h" | |
| 15 #include "media/cast/rtcp/rtcp.h" | |
| 16 #include "media/cast/rtcp/rtcp_defines.h" | |
| 17 #include "media/cast/transport/cast_transport_defines.h" | |
| 18 #include "media/cast/transport/rtcp/rtcp_builder.h" | |
| 19 | |
| 20 namespace media { | |
| 21 namespace cast { | |
| 22 | |
| 23 // We limit the size of receiver logs to avoid queuing up packets. | |
| 24 const size_t kMaxReceiverLogBytes = 200; | |
| 25 | |
| 26 // The determines how long to hold receiver log events, based on how | |
| 27 // many "receiver log message reports" ago the events were sent. | |
| 28 const size_t kReceiveLogMessageHistorySize = 20; | |
| 29 | |
| 30 // This determines when to send events the second time. | |
| 31 const size_t kFirstRedundancyOffset = 10; | |
| 32 COMPILE_ASSERT(kFirstRedundancyOffset > 0 && | |
| 33 kFirstRedundancyOffset <= kReceiveLogMessageHistorySize, | |
| 34 redundancy_offset_out_of_range); | |
| 35 | |
| 36 // When to send events the third time. | |
| 37 const size_t kSecondRedundancyOffset = 20; | |
| 38 COMPILE_ASSERT(kSecondRedundancyOffset > | |
| 39 kFirstRedundancyOffset && kSecondRedundancyOffset <= | |
| 40 kReceiveLogMessageHistorySize, | |
| 41 redundancy_offset_out_of_range); | |
| 42 | |
| 43 // TODO(mikhal): Resolve duplication between this and RtcpBuilder. | |
| 44 class RtcpSender { | |
| 45 public: | |
| 46 RtcpSender(scoped_refptr<CastEnvironment> cast_environment, | |
| 47 transport::PacedPacketSender* outgoing_transport, | |
| 48 uint32 sending_ssrc, | |
| 49 const std::string& c_name); | |
| 50 | |
| 51 virtual ~RtcpSender(); | |
| 52 | |
| 53 void SendRtcpFromRtpReceiver( | |
| 54 uint32 packet_type_flags, | |
| 55 const transport::RtcpReportBlock* report_block, | |
| 56 const RtcpReceiverReferenceTimeReport* rrtr, | |
| 57 const RtcpCastMessage* cast_message, | |
| 58 const ReceiverRtcpEventSubscriber::RtcpEventMultiMap* rtcp_events, | |
| 59 base::TimeDelta target_delay); | |
| 60 | |
| 61 private: | |
| 62 void BuildRR(const transport::RtcpReportBlock* report_block, | |
| 63 Packet* packet) const; | |
| 64 | |
| 65 void AddReportBlocks(const transport::RtcpReportBlock& report_block, | |
| 66 Packet* packet) const; | |
| 67 | |
| 68 void BuildSdec(Packet* packet) const; | |
| 69 | |
| 70 void BuildPli(uint32 remote_ssrc, Packet* packet) const; | |
| 71 | |
| 72 void BuildRemb(const RtcpRembMessage* remb, Packet* packet) const; | |
| 73 | |
| 74 void BuildRpsi(const RtcpRpsiMessage* rpsi, Packet* packet) const; | |
| 75 | |
| 76 void BuildNack(const RtcpNackMessage* nack, Packet* packet) const; | |
| 77 | |
| 78 void BuildBye(Packet* packet) const; | |
| 79 | |
| 80 void BuildRrtr(const RtcpReceiverReferenceTimeReport* rrtr, | |
| 81 Packet* packet) const; | |
| 82 | |
| 83 void BuildCast(const RtcpCastMessage* cast_message, | |
| 84 base::TimeDelta target_delay, | |
| 85 Packet* packet) const; | |
| 86 | |
| 87 void BuildReceiverLog( | |
| 88 const ReceiverRtcpEventSubscriber::RtcpEventMultiMap& rtcp_events, | |
| 89 Packet* packet); | |
| 90 | |
| 91 bool BuildRtcpReceiverLogMessage( | |
| 92 const ReceiverRtcpEventSubscriber::RtcpEventMultiMap& rtcp_events, | |
| 93 size_t start_size, | |
| 94 RtcpReceiverLogMessage* receiver_log_message, | |
| 95 size_t* number_of_frames, | |
| 96 size_t* total_number_of_messages_to_send, | |
| 97 size_t* rtcp_log_size); | |
| 98 | |
| 99 inline void BitrateToRembExponentBitrate(uint32 bitrate, | |
| 100 uint8* exponent, | |
| 101 uint32* mantissa) const { | |
| 102 // 6 bit exponent and a 18 bit mantissa. | |
| 103 *exponent = 0; | |
| 104 for (int i = 0; i < 64; ++i) { | |
| 105 if (bitrate <= (262143u << i)) { | |
| 106 *exponent = i; | |
| 107 break; | |
| 108 } | |
| 109 } | |
| 110 *mantissa = (bitrate >> *exponent); | |
| 111 } | |
| 112 | |
| 113 const uint32 ssrc_; | |
| 114 const std::string c_name_; | |
| 115 | |
| 116 // Not owned by this class. | |
| 117 transport::PacedPacketSender* const transport_; | |
| 118 scoped_refptr<CastEnvironment> cast_environment_; | |
| 119 | |
| 120 std::deque<RtcpReceiverLogMessage> rtcp_events_history_; | |
| 121 | |
| 122 DISALLOW_COPY_AND_ASSIGN(RtcpSender); | |
| 123 }; | |
| 124 | |
| 125 } // namespace cast | |
| 126 } // namespace media | |
| 127 #endif // MEDIA_CAST_RTCP_RTCP_SENDER_H_ | |
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Chromium Code Reviews
Issue 388663003:
Cast: Reshuffle files under media/cast (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src