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Side by Side Diff: media/cast/rtp_receiver/rtp_parser/rtp_parser.cc

Issue 145873006: ui/base/resource: Roll our own version of ReadBigEndian() function. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: base/big_endian Created 6 years, 10 months ago
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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/rtp_receiver/rtp_parser/rtp_parser.h" 5 #include "media/cast/rtp_receiver/rtp_parser/rtp_parser.h"
6 6
7 #include "base/big_endian.h"
7 #include "base/logging.h" 8 #include "base/logging.h"
8 #include "media/cast/cast_defines.h" 9 #include "media/cast/cast_defines.h"
9 #include "media/cast/rtp_receiver/rtp_receiver.h" 10 #include "media/cast/rtp_receiver/rtp_receiver.h"
10 #include "net/base/big_endian.h"
11 11
12 namespace media { 12 namespace media {
13 namespace cast { 13 namespace cast {
14 14
15 static const size_t kRtpCommonHeaderLength = 12; 15 static const size_t kRtpCommonHeaderLength = 12;
16 static const size_t kRtpCastHeaderLength = 7; 16 static const size_t kRtpCastHeaderLength = 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 19
20 RtpParser::RtpParser(RtpData* incoming_payload_callback, 20 RtpParser::RtpParser(RtpData* incoming_payload_callback,
(...skipping 28 matching lines...) Expand all
49 return false; 49 return false;
50 uint8 version = packet[0] >> 6; 50 uint8 version = packet[0] >> 6;
51 if (version != 2) 51 if (version != 2)
52 return false; 52 return false;
53 uint8 cc = packet[0] & 0x0f; 53 uint8 cc = packet[0] & 0x0f;
54 bool marker = ((packet[1] & 0x80) != 0); 54 bool marker = ((packet[1] & 0x80) != 0);
55 int payload_type = packet[1] & 0x7f; 55 int payload_type = packet[1] & 0x7f;
56 56
57 uint16 sequence_number; 57 uint16 sequence_number;
58 uint32 rtp_timestamp, ssrc; 58 uint32 rtp_timestamp, ssrc;
59 net::BigEndianReader big_endian_reader(packet + 2, 10); 59 base::BigEndianReader big_endian_reader(packet + 2, 10);
60 big_endian_reader.ReadU16(&sequence_number); 60 big_endian_reader.ReadU16(&sequence_number);
61 big_endian_reader.ReadU32(&rtp_timestamp); 61 big_endian_reader.ReadU32(&rtp_timestamp);
62 big_endian_reader.ReadU32(&ssrc); 62 big_endian_reader.ReadU32(&ssrc);
63 63
64 if (ssrc != parser_config_.ssrc) 64 if (ssrc != parser_config_.ssrc)
65 return false; 65 return false;
66 66
67 rtp_header->webrtc.header.markerBit = marker; 67 rtp_header->webrtc.header.markerBit = marker;
68 rtp_header->webrtc.header.payloadType = payload_type; 68 rtp_header->webrtc.header.payloadType = payload_type;
69 rtp_header->webrtc.header.sequenceNumber = sequence_number; 69 rtp_header->webrtc.header.sequenceNumber = sequence_number;
(...skipping 16 matching lines...) Expand all
86 if (length < kRtpCastHeaderLength) 86 if (length < kRtpCastHeaderLength)
87 return false; 87 return false;
88 88
89 // Extract header. 89 // Extract header.
90 const uint8* data_ptr = packet; 90 const uint8* data_ptr = packet;
91 size_t data_length = length; 91 size_t data_length = length;
92 rtp_header->is_key_frame = (data_ptr[0] & kCastKeyFrameBitMask); 92 rtp_header->is_key_frame = (data_ptr[0] & kCastKeyFrameBitMask);
93 rtp_header->is_reference = (data_ptr[0] & kCastReferenceFrameIdBitMask); 93 rtp_header->is_reference = (data_ptr[0] & kCastReferenceFrameIdBitMask);
94 rtp_header->frame_id = frame_id_wrap_helper_.MapTo32bitsFrameId(data_ptr[1]); 94 rtp_header->frame_id = frame_id_wrap_helper_.MapTo32bitsFrameId(data_ptr[1]);
95 95
96 net::BigEndianReader big_endian_reader(data_ptr + 2, 4); 96 base::BigEndianReader big_endian_reader(data_ptr + 2, 4);
97 big_endian_reader.ReadU16(&rtp_header->packet_id); 97 big_endian_reader.ReadU16(&rtp_header->packet_id);
98 big_endian_reader.ReadU16(&rtp_header->max_packet_id); 98 big_endian_reader.ReadU16(&rtp_header->max_packet_id);
99 99
100 if (rtp_header->is_reference) { 100 if (rtp_header->is_reference) {
101 rtp_header->reference_frame_id = 101 rtp_header->reference_frame_id =
102 reference_frame_id_wrap_helper_.MapTo32bitsFrameId(data_ptr[6]); 102 reference_frame_id_wrap_helper_.MapTo32bitsFrameId(data_ptr[6]);
103 data_ptr += kRtpCastHeaderLength; 103 data_ptr += kRtpCastHeaderLength;
104 data_length -= kRtpCastHeaderLength; 104 data_length -= kRtpCastHeaderLength;
105 } else { 105 } else {
106 data_ptr += kRtpCastHeaderLength - 1; 106 data_ptr += kRtpCastHeaderLength - 1;
107 data_length -= kRtpCastHeaderLength - 1; 107 data_length -= kRtpCastHeaderLength - 1;
108 } 108 }
109 109
110 if (rtp_header->max_packet_id < rtp_header->packet_id) 110 if (rtp_header->max_packet_id < rtp_header->packet_id)
111 return false; 111 return false;
112 112
113 data_callback_->OnReceivedPayloadData(data_ptr, data_length, rtp_header); 113 data_callback_->OnReceivedPayloadData(data_ptr, data_length, rtp_header);
114 return true; 114 return true;
115 } 115 }
116 116
117 } // namespace cast 117 } // namespace cast
118 } // namespace media 118 } // namespace media
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