5a098c51ea
It's duplicated to parse VP8 RTP packet at the moment. We firstly call RTPPayloadParser functions to save parsed information in RTPPayload structure, then copy them to RTP header. This CL removes RTPPayloadParser class and directly saves parsed data in RTP header. R=pbos@webrtc.org, stefan@webrtc.org Review URL: https://webrtc-codereview.appspot.com/27449004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@7211 4adac7df-926f-26a2-2b94-8c16560cd09d
122 lines
4.1 KiB
C++
122 lines
4.1 KiB
C++
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_UTILITY_H_
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#define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_UTILITY_H_
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#include <stddef.h> // size_t, ptrdiff_t
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#include "webrtc/modules/rtp_rtcp/interface/rtp_rtcp_defines.h"
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#include "webrtc/modules/rtp_rtcp/interface/receive_statistics.h"
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#include "webrtc/modules/rtp_rtcp/source/rtp_header_extension.h"
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#include "webrtc/modules/rtp_rtcp/source/rtp_rtcp_config.h"
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#include "webrtc/typedefs.h"
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namespace webrtc {
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const uint8_t kRtpMarkerBitMask = 0x80;
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RtpData* NullObjectRtpData();
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RtpFeedback* NullObjectRtpFeedback();
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RtpAudioFeedback* NullObjectRtpAudioFeedback();
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ReceiveStatistics* NullObjectReceiveStatistics();
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namespace RtpUtility {
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// January 1970, in NTP seconds.
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const uint32_t NTP_JAN_1970 = 2208988800UL;
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// Magic NTP fractional unit.
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const double NTP_FRAC = 4.294967296E+9;
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struct Payload
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{
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char name[RTP_PAYLOAD_NAME_SIZE];
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bool audio;
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PayloadUnion typeSpecific;
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};
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typedef std::map<int8_t, Payload*> PayloadTypeMap;
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// Return the current RTP timestamp from the NTP timestamp
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// returned by the specified clock.
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uint32_t GetCurrentRTP(Clock* clock, uint32_t freq);
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// Return the current RTP absolute timestamp.
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uint32_t ConvertNTPTimeToRTP(uint32_t NTPsec,
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uint32_t NTPfrac,
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uint32_t freq);
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uint32_t pow2(uint8_t exp);
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// Returns true if |newTimestamp| is older than |existingTimestamp|.
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// |wrapped| will be set to true if there has been a wraparound between the
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// two timestamps.
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bool OldTimestamp(uint32_t newTimestamp,
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uint32_t existingTimestamp,
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bool* wrapped);
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bool StringCompare(const char* str1,
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const char* str2,
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const uint32_t length);
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void AssignUWord32ToBuffer(uint8_t* dataBuffer, uint32_t value);
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void AssignUWord24ToBuffer(uint8_t* dataBuffer, uint32_t value);
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void AssignUWord16ToBuffer(uint8_t* dataBuffer, uint16_t value);
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/**
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* Converts a network-ordered two-byte input buffer to a host-ordered value.
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* \param[in] dataBuffer Network-ordered two-byte buffer to convert.
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* \return Host-ordered value.
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*/
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uint16_t BufferToUWord16(const uint8_t* dataBuffer);
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/**
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* Converts a network-ordered three-byte input buffer to a host-ordered value.
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* \param[in] dataBuffer Network-ordered three-byte buffer to convert.
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* \return Host-ordered value.
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*/
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uint32_t BufferToUWord24(const uint8_t* dataBuffer);
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/**
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* Converts a network-ordered four-byte input buffer to a host-ordered value.
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* \param[in] dataBuffer Network-ordered four-byte buffer to convert.
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* \return Host-ordered value.
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*/
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uint32_t BufferToUWord32(const uint8_t* dataBuffer);
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class RtpHeaderParser {
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public:
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RtpHeaderParser(const uint8_t* rtpData, size_t rtpDataLength);
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~RtpHeaderParser();
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bool RTCP() const;
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bool ParseRtcp(RTPHeader* header) const;
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bool Parse(RTPHeader& parsedPacket,
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RtpHeaderExtensionMap* ptrExtensionMap = NULL) const;
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private:
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void ParseOneByteExtensionHeader(
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RTPHeader& parsedPacket,
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const RtpHeaderExtensionMap* ptrExtensionMap,
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const uint8_t* ptrRTPDataExtensionEnd,
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const uint8_t* ptr) const;
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uint8_t ParsePaddingBytes(
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const uint8_t* ptrRTPDataExtensionEnd,
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const uint8_t* ptr) const;
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const uint8_t* const _ptrRTPDataBegin;
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const uint8_t* const _ptrRTPDataEnd;
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};
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} // namespace RtpUtility
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} // namespace webrtc
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#endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_UTILITY_H_
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