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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "media/cast/transport/rtp_sender/rtp_packetizer/rtp_packetizer.h" | 5 #include "media/cast/transport/rtp_sender/rtp_packetizer/rtp_packetizer.h" |
6 | 6 |
7 #include "base/big_endian.h" | 7 #include "base/big_endian.h" |
8 #include "base/logging.h" | 8 #include "base/logging.h" |
9 #include "media/cast/transport/pacing/paced_sender.h" | 9 #include "media/cast/transport/pacing/paced_sender.h" |
10 | 10 |
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31 | 31 |
32 RtpPacketizer::RtpPacketizer(PacedSender* const transport, | 32 RtpPacketizer::RtpPacketizer(PacedSender* const transport, |
33 PacketStorage* packet_storage, | 33 PacketStorage* packet_storage, |
34 RtpPacketizerConfig rtp_packetizer_config) | 34 RtpPacketizerConfig rtp_packetizer_config) |
35 : config_(rtp_packetizer_config), | 35 : config_(rtp_packetizer_config), |
36 transport_(transport), | 36 transport_(transport), |
37 packet_storage_(packet_storage), | 37 packet_storage_(packet_storage), |
38 sequence_number_(config_.sequence_number), | 38 sequence_number_(config_.sequence_number), |
39 rtp_timestamp_(0), | 39 rtp_timestamp_(0), |
40 packet_id_(0), | 40 packet_id_(0), |
41 send_packets_count_(0), | 41 send_packet_count_(0), |
42 send_octet_count_(0) { | 42 send_octet_count_(0) { |
43 DCHECK(transport) << "Invalid argument"; | 43 DCHECK(transport) << "Invalid argument"; |
44 } | 44 } |
45 | 45 |
46 RtpPacketizer::~RtpPacketizer() {} | 46 RtpPacketizer::~RtpPacketizer() {} |
47 | 47 |
48 void RtpPacketizer::IncomingEncodedVideoFrame( | 48 void RtpPacketizer::IncomingEncodedVideoFrame( |
49 const EncodedVideoFrame* video_frame, | 49 const EncodedVideoFrame* video_frame, |
50 const base::TimeTicks& capture_time) { | 50 const base::TimeTicks& capture_time) { |
51 DCHECK(!config_.audio) << "Invalid state"; | 51 DCHECK(!config_.audio) << "Invalid state"; |
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73 audio_frame->rtp_timestamp, | 73 audio_frame->rtp_timestamp, |
74 audio_frame->data, | 74 audio_frame->data, |
75 recorded_time); | 75 recorded_time); |
76 } | 76 } |
77 | 77 |
78 uint16 RtpPacketizer::NextSequenceNumber() { | 78 uint16 RtpPacketizer::NextSequenceNumber() { |
79 ++sequence_number_; | 79 ++sequence_number_; |
80 return sequence_number_ - 1; | 80 return sequence_number_ - 1; |
81 } | 81 } |
82 | 82 |
83 bool RtpPacketizer::LastSentTimestamp(base::TimeTicks* time_sent, | |
84 uint32* rtp_timestamp) const { | |
85 if (time_last_sent_rtp_timestamp_.is_null()) | |
86 return false; | |
87 | |
88 *time_sent = time_last_sent_rtp_timestamp_; | |
89 *rtp_timestamp = rtp_timestamp_; | |
90 return true; | |
91 } | |
92 | |
93 // TODO(mikhal): Switch to pass data with a const_ref. | 83 // TODO(mikhal): Switch to pass data with a const_ref. |
94 void RtpPacketizer::Cast(bool is_key, | 84 void RtpPacketizer::Cast(bool is_key, |
95 uint32 frame_id, | 85 uint32 frame_id, |
96 uint32 reference_frame_id, | 86 uint32 reference_frame_id, |
97 uint32 timestamp, | 87 uint32 timestamp, |
98 const std::string& data, | 88 const std::string& data, |
99 const base::TimeTicks& capture_time) { | 89 const base::TimeTicks& capture_time) { |
100 time_last_sent_rtp_timestamp_ = capture_time; | |
101 uint16 rtp_header_length = kCommonRtpHeaderLength + kCastRtpHeaderLength; | 90 uint16 rtp_header_length = kCommonRtpHeaderLength + kCastRtpHeaderLength; |
102 uint16 max_length = config_.max_payload_length - rtp_header_length - 1; | 91 uint16 max_length = config_.max_payload_length - rtp_header_length - 1; |
103 rtp_timestamp_ = timestamp; | 92 rtp_timestamp_ = timestamp; |
104 | 93 |
105 // Split the payload evenly (round number up). | 94 // Split the payload evenly (round number up). |
106 size_t num_packets = (data.size() + max_length) / max_length; | 95 size_t num_packets = (data.size() + max_length) / max_length; |
107 size_t payload_length = (data.size() + num_packets) / num_packets; | 96 size_t payload_length = (data.size() + num_packets) / num_packets; |
108 DCHECK_LE(payload_length, max_length) << "Invalid argument"; | 97 DCHECK_LE(payload_length, max_length) << "Invalid argument"; |
109 | 98 |
110 SendPacketVector packets; | 99 SendPacketVector packets; |
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140 PacketKey key = PacedPacketSender::MakePacketKey(capture_time, | 129 PacketKey key = PacedPacketSender::MakePacketKey(capture_time, |
141 config_.ssrc, | 130 config_.ssrc, |
142 packet_id_); | 131 packet_id_); |
143 | 132 |
144 // Store packet. | 133 // Store packet. |
145 packet_storage_->StorePacket(frame_id, packet_id_, key, packet); | 134 packet_storage_->StorePacket(frame_id, packet_id_, key, packet); |
146 ++packet_id_; | 135 ++packet_id_; |
147 data_iter += payload_length; | 136 data_iter += payload_length; |
148 | 137 |
149 // Update stats. | 138 // Update stats. |
150 ++send_packets_count_; | 139 ++send_packet_count_; |
151 send_octet_count_ += payload_length; | 140 send_octet_count_ += payload_length; |
152 packets.push_back(make_pair(key, packet)); | 141 packets.push_back(make_pair(key, packet)); |
153 } | 142 } |
154 DCHECK(packet_id_ == num_packets) << "Invalid state"; | 143 DCHECK(packet_id_ == num_packets) << "Invalid state"; |
155 | 144 |
156 // Send to network. | 145 // Send to network. |
157 transport_->SendPackets(packets); | 146 transport_->SendPackets(packets); |
158 | 147 |
159 // Prepare for next frame. | 148 // Prepare for next frame. |
160 packet_id_ = 0; | 149 packet_id_ = 0; |
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172 reinterpret_cast<char*>(&((*packet)[start_size])), 10); | 161 reinterpret_cast<char*>(&((*packet)[start_size])), 10); |
173 big_endian_writer.WriteU16(sequence_number_); | 162 big_endian_writer.WriteU16(sequence_number_); |
174 big_endian_writer.WriteU32(time_stamp); | 163 big_endian_writer.WriteU32(time_stamp); |
175 big_endian_writer.WriteU32(config_.ssrc); | 164 big_endian_writer.WriteU32(config_.ssrc); |
176 ++sequence_number_; | 165 ++sequence_number_; |
177 } | 166 } |
178 | 167 |
179 } // namespace transport | 168 } // namespace transport |
180 } // namespace cast | 169 } // namespace cast |
181 } // namespace media | 170 } // namespace media |
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