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Do basic parsing of RTCP headers in PcapFileReader to enable log filtering.

Browse Source 
BUG=
R=mflodman@webrtc.org, stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1697004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@4266 4adac7df-926f-26a2-2b94-8c16560cd09d
This commit is contained in:
solenberg@webrtc.org
2013-06-26 08:36:07 +00:00
parent 892d750ba6
commit a5fd2f1348
3 changed files with 44 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

40
webrtc/modules/rtp_rtcp/source/rtp_utility.cc
View File

@ -49,8 +49,12 @@ namespace webrtc {
namespace ModuleRTPUtility {
enum {
kRtcpExpectedVersion = 2,
kRtcpMinHeaderLength = 4,
kRtcpExpectedVersion = 2
kRtcpMinParseLength = 8,
kRtpExpectedVersion = 2,
kRtpMinParseLength = 12
};
/*
@ -291,11 +295,39 @@ bool RTPHeaderParser::RTCP() const {
return RTCP;
}
bool RTPHeaderParser::ParseRtcp(RTPHeader* header) const {
assert(header != NULL);
const ptrdiff_t length = _ptrRTPDataEnd - _ptrRTPDataBegin;
if (length < kRtcpMinParseLength) {
return false;
}
const uint8_t V = _ptrRTPDataBegin[0] >> 6;
if (V != kRtcpExpectedVersion) {
return false;
}
const uint8_t PT = _ptrRTPDataBegin[1];
const uint16_t len = (_ptrRTPDataBegin[2] << 8) + _ptrRTPDataBegin[3];
const uint8_t* ptr = &_ptrRTPDataBegin[4];
uint32_t SSRC = *ptr++ << 24;
SSRC += *ptr++ << 16;
SSRC += *ptr++ << 8;
SSRC += *ptr++;
header->payloadType = PT;
header->ssrc = SSRC;
header->headerLength = 4 + (len << 2);
return true;
}
bool RTPHeaderParser::Parse(RTPHeader& header,
RtpHeaderExtensionMap* ptrExtensionMap) const {
const ptrdiff_t length = _ptrRTPDataEnd - _ptrRTPDataBegin;
if (length < 12) {
if (length < kRtpMinParseLength) {
return false;
}
@ -325,7 +357,7 @@ bool RTPHeaderParser::Parse(RTPHeader& header,
SSRC += *ptr++ << 8;
SSRC += *ptr++;
if (V != 2) {
if (V != kRtpExpectedVersion) {
return false;
}