mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-12-23 18:15:45 -05:00
259 lines
7.9 KiB
C++
259 lines
7.9 KiB
C++
/*
|
|
|
|
This file is a part of JRTPLIB
|
|
Copyright (c) 1999-2017 Jori Liesenborgs
|
|
|
|
Contact: jori.liesenborgs@gmail.com
|
|
|
|
This library was developed at the Expertise Centre for Digital Media
|
|
(http://www.edm.uhasselt.be), a research center of the Hasselt University
|
|
(http://www.uhasselt.be). The library is based upon work done for
|
|
my thesis at the School for Knowledge Technology (Belgium/The Netherlands).
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a
|
|
copy of this software and associated documentation files (the "Software"),
|
|
to deal in the Software without restriction, including without limitation
|
|
the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
and/or sell copies of the Software, and to permit persons to whom the
|
|
Software is furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included
|
|
in all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
IN THE SOFTWARE.
|
|
|
|
*/
|
|
|
|
/**
|
|
* \file rtppacket.h
|
|
*/
|
|
|
|
#ifndef RTPPACKET_H
|
|
|
|
#define RTPPACKET_H
|
|
|
|
#include "rtpconfig.h"
|
|
#include "rtptypes.h"
|
|
#include "rtptimeutilities.h"
|
|
#include "rtpendian.h"
|
|
|
|
namespace qrtplib
|
|
{
|
|
|
|
class RTPRawPacket;
|
|
|
|
/** Represents an RTP Packet.
|
|
* The RTPPacket class can be used to parse a RTPRawPacket instance if it represents RTP data.
|
|
* The class can also be used to create a new RTP packet according to the parameters specified by
|
|
* the user.
|
|
*/
|
|
class RTPPacket
|
|
{
|
|
public:
|
|
/** Creates an RTPPacket instance based upon the data in \c rawpack, optionally installing a memory manager.
|
|
* Creates an RTPPacket instance based upon the data in \c rawpack, optionally installing a memory manager.
|
|
* If successful, the data is moved from the raw packet to the RTPPacket instance.
|
|
*/
|
|
RTPPacket(RTPRawPacket &rawpack);
|
|
|
|
/** Creates a new buffer for an RTP packet and fills in the fields according to the specified parameters.
|
|
* Creates a new buffer for an RTP packet and fills in the fields according to the specified parameters.
|
|
* If \c maxpacksize is not equal to zero, an error is generated if the total packet size would exceed
|
|
* \c maxpacksize. The arguments of the constructor are self-explanatory. Note that the size of a header
|
|
* extension is specified in a number of 32-bit words. A memory manager can be installed.
|
|
*/
|
|
RTPPacket(uint8_t payloadtype,
|
|
const void *payloaddata,
|
|
unsigned int payloadlen,
|
|
uint16_t seqnr,
|
|
uint32_t timestamp,
|
|
uint32_t ssrc,
|
|
bool gotmarker,
|
|
uint8_t numcsrcs,
|
|
const uint32_t *csrcs,
|
|
bool gotextension,
|
|
uint16_t extensionid,
|
|
uint16_t extensionlen_numwords,
|
|
const void *extensiondata,
|
|
unsigned int maxpacksize);
|
|
|
|
/** This constructor is similar to the other constructor, but here data is stored in an external buffer
|
|
* \c buffer with size \c buffersize. */
|
|
RTPPacket(uint8_t payloadtype,
|
|
const void *payloaddata,
|
|
unsigned int payloadlen,
|
|
uint16_t seqnr,
|
|
uint32_t timestamp,
|
|
uint32_t ssrc,
|
|
bool gotmarker,
|
|
uint8_t numcsrcs,
|
|
const uint32_t *csrcs,
|
|
bool gotextension,
|
|
uint16_t extensionid,
|
|
uint16_t extensionlen_numwords,
|
|
const void *extensiondata,
|
|
void *buffer,
|
|
unsigned int buffersize);
|
|
|
|
virtual ~RTPPacket()
|
|
{
|
|
if (packet && !externalbuffer)
|
|
delete[] packet;
|
|
}
|
|
|
|
/** If an error occurred in one of the constructors, this function returns the error code. */
|
|
int GetCreationError() const
|
|
{
|
|
return error;
|
|
}
|
|
|
|
/** Returns \c true if the RTP packet has a header extension and \c false otherwise. */
|
|
bool HasExtension() const
|
|
{
|
|
return hasextension;
|
|
}
|
|
|
|
/** Returns \c true if the marker bit was set and \c false otherwise. */
|
|
bool HasMarker() const
|
|
{
|
|
return hasmarker;
|
|
}
|
|
|
|
/** Returns the number of CSRCs contained in this packet. */
|
|
int GetCSRCCount() const
|
|
{
|
|
return numcsrcs;
|
|
}
|
|
|
|
/** Returns a specific CSRC identifier.
|
|
* Returns a specific CSRC identifier. The parameter \c num can go from 0 to GetCSRCCount()-1.
|
|
*/
|
|
uint32_t GetCSRC(int num) const;
|
|
|
|
/** Returns the payload type of the packet. */
|
|
uint8_t GetPayloadType() const
|
|
{
|
|
return payloadtype;
|
|
}
|
|
|
|
/** Returns the extended sequence number of the packet.
|
|
* Returns the extended sequence number of the packet. When the packet is just received,
|
|
* only the low $16$ bits will be set. The high 16 bits can be filled in later.
|
|
*/
|
|
uint32_t GetExtendedSequenceNumber() const
|
|
{
|
|
return extseqnr;
|
|
}
|
|
|
|
/** Returns the sequence number of this packet. */
|
|
uint16_t GetSequenceNumber() const
|
|
{
|
|
return (uint16_t) (extseqnr & 0x0000FFFF);
|
|
}
|
|
|
|
/** Sets the extended sequence number of this packet to \c seq. */
|
|
void SetExtendedSequenceNumber(uint32_t seq)
|
|
{
|
|
extseqnr = seq;
|
|
}
|
|
|
|
/** Returns the timestamp of this packet. */
|
|
uint32_t GetTimestamp() const
|
|
{
|
|
return timestamp;
|
|
}
|
|
|
|
/** Returns the SSRC identifier stored in this packet. */
|
|
uint32_t GetSSRC() const
|
|
{
|
|
return ssrc;
|
|
}
|
|
|
|
/** Returns a pointer to the data of the entire packet. */
|
|
uint8_t *GetPacketData() const
|
|
{
|
|
return packet;
|
|
}
|
|
|
|
/** Returns a pointer to the actual payload data. */
|
|
uint8_t *GetPayloadData() const
|
|
{
|
|
return payload;
|
|
}
|
|
|
|
/** Returns the length of the entire packet. */
|
|
unsigned int GetPacketLength() const
|
|
{
|
|
return packetlength;
|
|
}
|
|
|
|
/** Returns the payload length. */
|
|
unsigned int GetPayloadLength() const
|
|
{
|
|
return payloadlength;
|
|
}
|
|
|
|
/** If a header extension is present, this function returns the extension identifier. */
|
|
uint16_t GetExtensionID() const
|
|
{
|
|
return extid;
|
|
}
|
|
|
|
/** Returns the length of the header extension data. */
|
|
uint8_t *GetExtensionData() const
|
|
{
|
|
return extension;
|
|
}
|
|
|
|
/** Returns the length of the header extension data. */
|
|
unsigned int GetExtensionLength() const
|
|
{
|
|
return extensionlength;
|
|
}
|
|
|
|
/** Returns the time at which this packet was received.
|
|
* When an RTPPacket instance is created from an RTPRawPacket instance, the raw packet's
|
|
* reception time is stored in the RTPPacket instance. This function then retrieves that
|
|
* time.
|
|
*/
|
|
RTPTime GetReceiveTime() const
|
|
{
|
|
return receivetime;
|
|
}
|
|
private:
|
|
void Clear();
|
|
int ParseRawPacket(RTPRawPacket &rawpack);
|
|
int BuildPacket(uint8_t payloadtype, const void *payloaddata, unsigned int payloadlen, uint16_t seqnr, uint32_t timestamp, uint32_t ssrc, bool gotmarker, uint8_t numcsrcs,
|
|
const uint32_t *csrcs, bool gotextension, uint16_t extensionid, uint16_t extensionlen_numwords, const void *extensiondata, void *buffer, unsigned int maxsize);
|
|
|
|
RTPEndian m_endian;
|
|
int error;
|
|
|
|
bool hasextension, hasmarker;
|
|
int numcsrcs;
|
|
|
|
uint8_t payloadtype;
|
|
uint32_t extseqnr, timestamp, ssrc;
|
|
uint8_t *packet, *payload;
|
|
unsigned int packetlength, payloadlength;
|
|
|
|
uint16_t extid;
|
|
uint8_t *extension;
|
|
unsigned int extensionlength;
|
|
|
|
bool externalbuffer;
|
|
|
|
RTPTime receivetime;
|
|
};
|
|
|
|
} // end namespace
|
|
|
|
#endif // RTPPACKET_H
|
|
|