1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*
* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/rtp_rtcp/include/rtp_header_parser.h"
#include "modules/rtp_rtcp/include/rtp_header_extension_map.h"
#include "modules/rtp_rtcp/source/rtp_utility.h"
#include "rtc_base/criticalsection.h"
namespace webrtc {
class RtpHeaderParserImpl : public RtpHeaderParser {
public:
RtpHeaderParserImpl();
virtual ~RtpHeaderParserImpl() {}
bool Parse(const uint8_t* packet,
size_t length,
RTPHeader* header,
bool secured) const override;
bool RegisterRtpHeaderExtension(RTPExtensionType type, uint8_t id) override;
bool DeregisterRtpHeaderExtension(RTPExtensionType type) override;
private:
rtc::CriticalSection critical_section_;
RtpHeaderExtensionMap rtp_header_extension_map_
RTC_GUARDED_BY(critical_section_);
};
RtpHeaderParser* RtpHeaderParser::Create() {
return new RtpHeaderParserImpl;
}
RtpHeaderParserImpl::RtpHeaderParserImpl() {}
bool RtpHeaderParser::IsRtcp(const uint8_t* packet, size_t length) {
RtpUtility::RtpHeaderParser rtp_parser(packet, length);
return rtp_parser.RTCP();
}
bool RtpHeaderParserImpl::Parse(const uint8_t* packet,
size_t length,
RTPHeader* header,
bool secured) const {
RtpUtility::RtpHeaderParser rtp_parser(packet, length);
memset(header, 0, sizeof(*header));
RtpHeaderExtensionMap map;
{
rtc::CritScope cs(&critical_section_);
map = rtp_header_extension_map_;
}
const bool valid_rtpheader = rtp_parser.Parse(header, &map, secured);
if (!valid_rtpheader) {
return false;
}
return true;
}
bool RtpHeaderParserImpl::RegisterRtpHeaderExtension(RTPExtensionType type,
uint8_t id) {
rtc::CritScope cs(&critical_section_);
return rtp_header_extension_map_.RegisterByType(id, type);
}
bool RtpHeaderParserImpl::DeregisterRtpHeaderExtension(RTPExtensionType type) {
rtc::CritScope cs(&critical_section_);
return rtp_header_extension_map_.Deregister(type) == 0;
}
} // namespace webrtc
|
