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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/logging.h" | 8 #include "base/logging.h" |
| 8 #include "media/cast/transport/pacing/paced_sender.h" | 9 #include "media/cast/transport/pacing/paced_sender.h" |
| 9 #include "net/base/big_endian.h" | |
| 10 | 10 |
| 11 namespace media { | 11 namespace media { |
| 12 namespace cast { | 12 namespace cast { |
| 13 namespace transport { | 13 namespace transport { |
| 14 | 14 |
| 15 static const uint16 kCommonRtpHeaderLength = 12; | 15 static const uint16 kCommonRtpHeaderLength = 12; |
| 16 static const uint16 kCastRtpHeaderLength = 7; | 16 static const uint16 kCastRtpHeaderLength = 7; |
| 17 static const uint8 kCastKeyFrameBitMask = 0x80; | 17 static const uint8 kCastKeyFrameBitMask = 0x80; |
| 18 static const uint8 kCastReferenceFrameIdBitMask = 0x40; | 18 static const uint8 kCastReferenceFrameIdBitMask = 0x40; |
| 19 static const uint8 kRtpMarkerBitMask = 0x80; | 19 static const uint8 kRtpMarkerBitMask = 0x80; |
| (...skipping 97 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 117 } | 117 } |
| 118 remaining_size -= payload_length; | 118 remaining_size -= payload_length; |
| 119 BuildCommonRTPheader(&packet, remaining_size == 0, timestamp); | 119 BuildCommonRTPheader(&packet, remaining_size == 0, timestamp); |
| 120 | 120 |
| 121 // Build Cast header. | 121 // Build Cast header. |
| 122 packet.push_back((is_key ? kCastKeyFrameBitMask : 0) | | 122 packet.push_back((is_key ? kCastKeyFrameBitMask : 0) | |
| 123 kCastReferenceFrameIdBitMask); | 123 kCastReferenceFrameIdBitMask); |
| 124 packet.push_back(frame_id); | 124 packet.push_back(frame_id); |
| 125 size_t start_size = packet.size(); | 125 size_t start_size = packet.size(); |
| 126 packet.resize(start_size + 4); | 126 packet.resize(start_size + 4); |
| 127 net::BigEndianWriter big_endian_writer(&(packet[start_size]), 4); | 127 base::BigEndianWriter big_endian_writer( |
| 128 reinterpret_cast<char*>(&(packet[start_size])), 4); |
| 128 big_endian_writer.WriteU16(packet_id_); | 129 big_endian_writer.WriteU16(packet_id_); |
| 129 big_endian_writer.WriteU16(static_cast<uint16>(num_packets - 1)); | 130 big_endian_writer.WriteU16(static_cast<uint16>(num_packets - 1)); |
| 130 packet.push_back(static_cast<uint8>(reference_frame_id)); | 131 packet.push_back(static_cast<uint8>(reference_frame_id)); |
| 131 | 132 |
| 132 // Copy payload data. | 133 // Copy payload data. |
| 133 packet.insert(packet.end(), data_iter, data_iter + payload_length); | 134 packet.insert(packet.end(), data_iter, data_iter + payload_length); |
| 134 | 135 |
| 135 // Store packet. | 136 // Store packet. |
| 136 packet_storage_->StorePacket(frame_id, packet_id_, &packet); | 137 packet_storage_->StorePacket(frame_id, packet_id_, &packet); |
| 137 ++packet_id_; | 138 ++packet_id_; |
| (...skipping 14 matching lines...) Expand all Loading... |
| 152 } | 153 } |
| 153 | 154 |
| 154 void RtpPacketizer::BuildCommonRTPheader(Packet* packet, | 155 void RtpPacketizer::BuildCommonRTPheader(Packet* packet, |
| 155 bool marker_bit, | 156 bool marker_bit, |
| 156 uint32 time_stamp) { | 157 uint32 time_stamp) { |
| 157 packet->push_back(0x80); | 158 packet->push_back(0x80); |
| 158 packet->push_back(static_cast<uint8>(config_.payload_type) | | 159 packet->push_back(static_cast<uint8>(config_.payload_type) | |
| 159 (marker_bit ? kRtpMarkerBitMask : 0)); | 160 (marker_bit ? kRtpMarkerBitMask : 0)); |
| 160 size_t start_size = packet->size(); | 161 size_t start_size = packet->size(); |
| 161 packet->resize(start_size + 10); | 162 packet->resize(start_size + 10); |
| 162 net::BigEndianWriter big_endian_writer(&((*packet)[start_size]), 10); | 163 base::BigEndianWriter big_endian_writer( |
| 164 reinterpret_cast<char*>(&((*packet)[start_size])), 10); |
| 163 big_endian_writer.WriteU16(sequence_number_); | 165 big_endian_writer.WriteU16(sequence_number_); |
| 164 big_endian_writer.WriteU32(time_stamp); | 166 big_endian_writer.WriteU32(time_stamp); |
| 165 big_endian_writer.WriteU32(config_.ssrc); | 167 big_endian_writer.WriteU32(config_.ssrc); |
| 166 ++sequence_number_; | 168 ++sequence_number_; |
| 167 } | 169 } |
| 168 | 170 |
| 169 } // namespace transport | 171 } // namespace transport |
| 170 } // namespace cast | 172 } // namespace cast |
| 171 } // namespace media | 173 } // namespace media |
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