mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-12-24 10:50:29 -05:00
435 lines
20 KiB
C++
435 lines
20 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 rtpsources.h
|
|
*/
|
|
|
|
#ifndef RTPSOURCES_H
|
|
|
|
#define RTPSOURCES_H
|
|
|
|
#include "rtpconfig.h"
|
|
#include "rtpkeyhashtable.h"
|
|
#include "rtcpsdespacket.h"
|
|
#include "rtptypes.h"
|
|
|
|
#include "export.h"
|
|
|
|
#define RTPSOURCES_HASHSIZE 8317
|
|
|
|
namespace qrtplib
|
|
{
|
|
|
|
class QRTPLIB_API RTPSources_GetHashIndex
|
|
{
|
|
public:
|
|
static int GetIndex(const uint32_t &ssrc)
|
|
{
|
|
return ssrc % RTPSOURCES_HASHSIZE;
|
|
}
|
|
};
|
|
|
|
class RTPNTPTime;
|
|
class RTPTransmitter;
|
|
class RTCPAPPPacket;
|
|
class RTPInternalSourceData;
|
|
class RTPRawPacket;
|
|
class RTPPacket;
|
|
class RTPTime;
|
|
class RTPAddress;
|
|
class RTPSourceData;
|
|
|
|
/** Represents a table in which information about the participating sources is kept.
|
|
* Represents a table in which information about the participating sources is kept. The class has member
|
|
* functions to process RTP and RTCP data and to iterate over the participants. Note that a NULL address
|
|
* is used to identify packets from our own session. The class also provides some overridable functions
|
|
* which can be used to catch certain events (new SSRC, SSRC collision, ...).
|
|
*/
|
|
class QRTPLIB_API RTPSources
|
|
{
|
|
public:
|
|
/** Type of probation to use for new sources. */
|
|
enum ProbationType
|
|
{
|
|
NoProbation, /**< Don't use the probation algorithm; accept RTP packets immediately. */
|
|
ProbationDiscard, /**< Discard incoming RTP packets originating from a source that's on probation. */
|
|
ProbationStore /**< Store incoming RTP packet from a source that's on probation for later retrieval. */
|
|
};
|
|
|
|
/** In the constructor you can select the probation type you'd like to use and also a memory manager. */
|
|
RTPSources();
|
|
virtual ~RTPSources();
|
|
|
|
/** Clears the source table. */
|
|
void Clear();
|
|
|
|
/** Creates an entry for our own SSRC identifier. */
|
|
int CreateOwnSSRC(uint32_t ssrc);
|
|
|
|
/** Deletes the entry for our own SSRC identifier. */
|
|
int DeleteOwnSSRC();
|
|
|
|
/** This function should be called if our own session has sent an RTP packet.
|
|
* This function should be called if our own session has sent an RTP packet.
|
|
* For our own SSRC entry, the sender flag is updated based upon outgoing packets instead of incoming packets.
|
|
*/
|
|
void SentRTPPacket();
|
|
|
|
/** Processes a raw packet \c rawpack.
|
|
* Processes a raw packet \c rawpack. The instance \c trans will be used to check if this
|
|
* packet is one of our own packets. The flag \c acceptownpackets indicates whether own packets should be
|
|
* accepted or ignored.
|
|
*/
|
|
int ProcessRawPacket(RTPRawPacket *rawpack, RTPTransmitter *trans, bool acceptownpackets);
|
|
|
|
/** Processes a raw packet \c rawpack.
|
|
* Processes a raw packet \c rawpack. Every transmitter in the array \c trans of length \c numtrans
|
|
* is used to check if the packet is from our own session. The flag \c acceptownpackets indicates
|
|
* whether own packets should be accepted or ignored.
|
|
*/
|
|
int ProcessRawPacket(RTPRawPacket *rawpack, RTPTransmitter *trans[], int numtrans, bool acceptownpackets);
|
|
|
|
/** Processes an RTPPacket instance \c rtppack which was received at time \c receivetime and
|
|
* which originated from \c senderaddres.
|
|
* Processes an RTPPacket instance \c rtppack which was received at time \c receivetime and
|
|
* which originated from \c senderaddres. The \c senderaddress parameter must be NULL if
|
|
* the packet was sent by the local participant. The flag \c stored indicates whether the packet
|
|
* was stored in the table or not. If so, the \c rtppack instance may not be deleted.
|
|
*/
|
|
int ProcessRTPPacket(RTPPacket *rtppack, const RTPTime &receivetime, const RTPAddress *senderaddress, bool *stored);
|
|
|
|
/** Processes the RTCP compound packet \c rtcpcomppack which was received at time \c receivetime from \c senderaddress.
|
|
* Processes the RTCP compound packet \c rtcpcomppack which was received at time \c receivetime from \c senderaddress.
|
|
* The \c senderaddress parameter must be NULL if the packet was sent by the local participant.
|
|
*/
|
|
int ProcessRTCPCompoundPacket(RTCPCompoundPacket *rtcpcomppack, const RTPTime &receivetime, const RTPAddress *senderaddress);
|
|
|
|
/** Process the sender information of SSRC \c ssrc into the source table.
|
|
* Process the sender information of SSRC \c ssrc into the source table. The information was received
|
|
* at time \c receivetime from address \c senderaddress. The \c senderaddress} parameter must be NULL
|
|
* if the packet was sent by the local participant.
|
|
*/
|
|
int ProcessRTCPSenderInfo(uint32_t ssrc, const RTPNTPTime &ntptime, uint32_t rtptime, uint32_t packetcount, uint32_t octetcount, const RTPTime &receivetime,
|
|
const RTPAddress *senderaddress);
|
|
|
|
/** Processes the report block information which was sent by participant \c ssrc into the source table.
|
|
* Processes the report block information which was sent by participant \c ssrc into the source table.
|
|
* The information was received at time \c receivetime from address \c senderaddress The \c senderaddress
|
|
* parameter must be NULL if the packet was sent by the local participant.
|
|
*/
|
|
int ProcessRTCPReportBlock(uint32_t ssrc, uint8_t fractionlost, int32_t lostpackets, uint32_t exthighseqnr, uint32_t jitter, uint32_t lsr, uint32_t dlsr,
|
|
const RTPTime &receivetime, const RTPAddress *senderaddress);
|
|
|
|
/** Processes the non-private SDES item from source \c ssrc into the source table.
|
|
* Processes the non-private SDES item from source \c ssrc into the source table. The information was
|
|
* received at time \c receivetime from address \c senderaddress. The \c senderaddress parameter must
|
|
* be NULL if the packet was sent by the local participant.
|
|
*/
|
|
int ProcessSDESNormalItem(uint32_t ssrc, RTCPSDESPacket::ItemType t, std::size_t itemlength, const void *itemdata, const RTPTime &receivetime, const RTPAddress *senderaddress);
|
|
#ifdef RTP_SUPPORT_SDESPRIV
|
|
/** Processes the SDES private item from source \c ssrc into the source table.
|
|
* Processes the SDES private item from source \c ssrc into the source table. The information was
|
|
* received at time \c receivetime from address \c senderaddress. The \c senderaddress
|
|
* parameter must be NULL if the packet was sent by the local participant.
|
|
*/
|
|
int ProcessSDESPrivateItem(uint32_t ssrc, std::size_t prefixlen, const void *prefixdata, std::size_t valuelen, const void *valuedata, const RTPTime &receivetime,
|
|
const RTPAddress *senderaddress);
|
|
#endif //RTP_SUPPORT_SDESPRIV
|
|
/** Processes the BYE message for SSRC \c ssrc.
|
|
* Processes the BYE message for SSRC \c ssrc. The information was received at time \c receivetime from
|
|
* address \c senderaddress. The \c senderaddress parameter must be NULL if the packet was sent by the
|
|
* local participant.
|
|
*/
|
|
int ProcessBYE(uint32_t ssrc, std::size_t reasonlength, const void *reasondata, const RTPTime &receivetime, const RTPAddress *senderaddress);
|
|
|
|
/** If we heard from source \c ssrc, but no actual data was added to the source table (for example, if
|
|
* no report block was meant for us), this function can e used to indicate that something was received from
|
|
* this source.
|
|
* If we heard from source \c ssrc, but no actual data was added to the source table (for example, if
|
|
* no report block was meant for us), this function can e used to indicate that something was received from
|
|
* this source. This will prevent a premature timeout for this participant. The message was received at time
|
|
* \c receivetime from address \c senderaddress. The \c senderaddress parameter must be NULL if the
|
|
* packet was sent by the local participant.
|
|
*/
|
|
int UpdateReceiveTime(uint32_t ssrc, const RTPTime &receivetime, const RTPAddress *senderaddress);
|
|
|
|
/** Starts the iteration over the participants by going to the first member in the table.
|
|
* Starts the iteration over the participants by going to the first member in the table.
|
|
* If a member was found, the function returns \c true, otherwise it returns \c false.
|
|
*/
|
|
bool GotoFirstSource();
|
|
|
|
/** Sets the current source to be the next source in the table.
|
|
* Sets the current source to be the next source in the table. If we're already at the last source,
|
|
* the function returns \c false, otherwise it returns \c true.
|
|
*/
|
|
bool GotoNextSource();
|
|
|
|
/** Sets the current source to be the previous source in the table.
|
|
* Sets the current source to be the previous source in the table. If we're at the first source,
|
|
* the function returns \c false, otherwise it returns \c true.
|
|
*/
|
|
bool GotoPreviousSource();
|
|
|
|
/** Sets the current source to be the first source in the table which has RTPPacket instances
|
|
* that we haven't extracted yet.
|
|
* Sets the current source to be the first source in the table which has RTPPacket instances
|
|
* that we haven't extracted yet. If no such member was found, the function returns \c false,
|
|
* otherwise it returns \c true.
|
|
*/
|
|
bool GotoFirstSourceWithData();
|
|
|
|
/** Sets the current source to be the next source in the table which has RTPPacket instances that
|
|
* we haven't extracted yet.
|
|
* Sets the current source to be the next source in the table which has RTPPacket instances that
|
|
* we haven't extracted yet. If no such member was found, the function returns \c false,
|
|
* otherwise it returns \c true.
|
|
*/
|
|
bool GotoNextSourceWithData();
|
|
|
|
/** Sets the current source to be the previous source in the table which has RTPPacket instances
|
|
* that we haven't extracted yet.
|
|
* Sets the current source to be the previous source in the table which has RTPPacket instances
|
|
* that we haven't extracted yet. If no such member was found, the function returns \c false,
|
|
* otherwise it returns \c true.
|
|
*/
|
|
bool GotoPreviousSourceWithData();
|
|
|
|
/** Returns the RTPSourceData instance for the currently selected participant. */
|
|
RTPSourceData *GetCurrentSourceInfo();
|
|
|
|
/** Returns the RTPSourceData instance for the participant identified by \c ssrc, or
|
|
* NULL if no such entry exists.
|
|
*/
|
|
RTPSourceData *GetSourceInfo(uint32_t ssrc);
|
|
|
|
/** Extracts the next packet from the received packets queue of the current participant. */
|
|
RTPPacket *GetNextPacket();
|
|
|
|
/** Returns \c true if an entry for participant \c ssrc exists and \c false otherwise. */
|
|
bool GotEntry(uint32_t ssrc);
|
|
|
|
/** If present, it returns the RTPSourceData instance of the entry which was created by CreateOwnSSRC. */
|
|
RTPSourceData *GetOwnSourceInfo()
|
|
{
|
|
return (RTPSourceData *) owndata;
|
|
}
|
|
|
|
/** Assuming that the current time is \c curtime, time out the members from whom we haven't heard
|
|
* during the previous time interval \c timeoutdelay.
|
|
*/
|
|
void Timeout(const RTPTime &curtime, const RTPTime &timeoutdelay);
|
|
|
|
/** Assuming that the current time is \c curtime, remove the sender flag for senders from whom we haven't
|
|
* received any RTP packets during the previous time interval \c timeoutdelay.
|
|
*/
|
|
void SenderTimeout(const RTPTime &curtime, const RTPTime &timeoutdelay);
|
|
|
|
/** Assuming that the current time is \c curtime, remove the members who sent a BYE packet more than
|
|
* the time interval \c timeoutdelay ago.
|
|
*/
|
|
void BYETimeout(const RTPTime &curtime, const RTPTime &timeoutdelay);
|
|
|
|
/** Assuming that the current time is \c curtime, clear the SDES NOTE items which haven't been updated
|
|
* during the previous time interval \c timeoutdelay.
|
|
*/
|
|
void NoteTimeout(const RTPTime &curtime, const RTPTime &timeoutdelay);
|
|
|
|
/** Combines the functions SenderTimeout, BYETimeout, Timeout and NoteTimeout.
|
|
* Combines the functions SenderTimeout, BYETimeout, Timeout and NoteTimeout. This is more efficient
|
|
* than calling all four functions since only one iteration is needed in this function.
|
|
*/
|
|
void MultipleTimeouts(const RTPTime &curtime, const RTPTime &sendertimeout, const RTPTime &byetimeout, const RTPTime &generaltimeout, const RTPTime ¬etimeout);
|
|
|
|
/** Returns the number of participants which are marked as a sender. */
|
|
int GetSenderCount() const
|
|
{
|
|
return sendercount;
|
|
}
|
|
|
|
/** Returns the total number of entries in the source table. */
|
|
int GetTotalCount() const
|
|
{
|
|
return totalcount;
|
|
}
|
|
|
|
/** Returns the number of members which have been validated and which haven't sent a BYE packet yet. */
|
|
int GetActiveMemberCount() const
|
|
{
|
|
return activecount;
|
|
}
|
|
|
|
protected:
|
|
/** Is called when an RTP packet is about to be processed. */
|
|
virtual void OnRTPPacket(RTPPacket *pack, const RTPTime &receivetime, const RTPAddress *senderaddress);
|
|
|
|
/** Is called when an RTCP compound packet is about to be processed. */
|
|
virtual void OnRTCPCompoundPacket(RTCPCompoundPacket *pack, const RTPTime &receivetime, const RTPAddress *senderaddress);
|
|
|
|
/** Is called when an SSRC collision was detected.
|
|
* Is called when an SSRC collision was detected. The instance \c srcdat is the one present in
|
|
* the table, the address \c senderaddress is the one that collided with one of the addresses
|
|
* and \c isrtp indicates against which address of \c srcdat the check failed.
|
|
*/
|
|
virtual void OnSSRCCollision(RTPSourceData *srcdat, const RTPAddress *senderaddress, bool isrtp);
|
|
|
|
/** Is called when another CNAME was received than the one already present for source \c srcdat. */
|
|
virtual void OnCNAMECollision(RTPSourceData *srcdat, const RTPAddress *senderaddress, const uint8_t *cname, std::size_t cnamelength);
|
|
|
|
/** Is called when a new entry \c srcdat is added to the source table. */
|
|
virtual void OnNewSource(RTPSourceData *srcdat);
|
|
|
|
/** Is called when the entry \c srcdat is about to be deleted from the source table. */
|
|
virtual void OnRemoveSource(RTPSourceData *srcdat);
|
|
|
|
/** Is called when participant \c srcdat is timed out. */
|
|
virtual void OnTimeout(RTPSourceData *srcdat);
|
|
|
|
/** Is called when participant \c srcdat is timed after having sent a BYE packet. */
|
|
virtual void OnBYETimeout(RTPSourceData *srcdat);
|
|
|
|
/** Is called when a BYE packet has been processed for source \c srcdat. */
|
|
virtual void OnBYEPacket(RTPSourceData *srcdat);
|
|
|
|
/** Is called when an RTCP sender report has been processed for this source. */
|
|
virtual void OnRTCPSenderReport(RTPSourceData *srcdat);
|
|
|
|
/** Is called when an RTCP receiver report has been processed for this source. */
|
|
virtual void OnRTCPReceiverReport(RTPSourceData *srcdat);
|
|
|
|
/** Is called when a specific SDES item was received for this source. */
|
|
virtual void OnRTCPSDESItem(RTPSourceData *srcdat, RTCPSDESPacket::ItemType t, const void *itemdata, std::size_t itemlength);
|
|
#ifdef RTP_SUPPORT_SDESPRIV
|
|
/** Is called when a specific SDES item of 'private' type was received for this source. */
|
|
virtual void OnRTCPSDESPrivateItem(RTPSourceData *srcdat, const void *prefixdata, std::size_t prefixlen, const void *valuedata, std::size_t valuelen);
|
|
#endif // RTP_SUPPORT_SDESPRIV
|
|
|
|
/** Is called when an RTCP APP packet \c apppacket has been received at time \c receivetime
|
|
* from address \c senderaddress.
|
|
*/
|
|
virtual void OnAPPPacket(RTCPAPPPacket *apppacket, const RTPTime &receivetime, const RTPAddress *senderaddress);
|
|
|
|
/** Is called when an unknown RTCP packet type was detected. */
|
|
virtual void OnUnknownPacketType(RTCPPacket *rtcppack, const RTPTime &receivetime, const RTPAddress *senderaddress);
|
|
|
|
/** Is called when an unknown packet format for a known packet type was detected. */
|
|
virtual void OnUnknownPacketFormat(RTCPPacket *rtcppack, const RTPTime &receivetime, const RTPAddress *senderaddress);
|
|
|
|
/** Is called when the SDES NOTE item for source \c srcdat has been timed out. */
|
|
virtual void OnNoteTimeout(RTPSourceData *srcdat);
|
|
|
|
/** Allows you to use an RTP packet from the specified source directly.
|
|
* Allows you to use an RTP packet from the specified source directly. If
|
|
* `ispackethandled` is set to `true`, the packet will no longer be stored in this
|
|
* source's packet list. */
|
|
virtual void OnValidatedRTPPacket(RTPSourceData *srcdat, RTPPacket *rtppack, bool isonprobation, bool *ispackethandled);
|
|
private:
|
|
void ClearSourceList();
|
|
int ObtainSourceDataInstance(uint32_t ssrc, RTPInternalSourceData **srcdat, bool *created);
|
|
int GetRTCPSourceData(uint32_t ssrc, const RTPAddress *senderaddress, RTPInternalSourceData **srcdat, bool *newsource);
|
|
bool CheckCollision(RTPInternalSourceData *srcdat, const RTPAddress *senderaddress, bool isrtp);
|
|
|
|
RTPKeyHashTable<const uint32_t, RTPInternalSourceData*, RTPSources_GetHashIndex, RTPSOURCES_HASHSIZE> sourcelist;
|
|
|
|
int sendercount;
|
|
int totalcount;
|
|
int activecount;
|
|
|
|
RTPInternalSourceData *owndata;
|
|
|
|
friend class RTPInternalSourceData;
|
|
};
|
|
|
|
// Inlining the default implementations to avoid unused-parameter errors.
|
|
inline void RTPSources::OnRTPPacket(RTPPacket *, const RTPTime &, const RTPAddress *)
|
|
{
|
|
}
|
|
inline void RTPSources::OnRTCPCompoundPacket(RTCPCompoundPacket *, const RTPTime &, const RTPAddress *)
|
|
{
|
|
}
|
|
inline void RTPSources::OnSSRCCollision(RTPSourceData *, const RTPAddress *, bool)
|
|
{
|
|
}
|
|
inline void RTPSources::OnCNAMECollision(RTPSourceData *, const RTPAddress *, const uint8_t *, std::size_t)
|
|
{
|
|
}
|
|
inline void RTPSources::OnNewSource(RTPSourceData *)
|
|
{
|
|
}
|
|
inline void RTPSources::OnRemoveSource(RTPSourceData *)
|
|
{
|
|
}
|
|
inline void RTPSources::OnTimeout(RTPSourceData *)
|
|
{
|
|
}
|
|
inline void RTPSources::OnBYETimeout(RTPSourceData *)
|
|
{
|
|
}
|
|
inline void RTPSources::OnBYEPacket(RTPSourceData *)
|
|
{
|
|
}
|
|
inline void RTPSources::OnRTCPSenderReport(RTPSourceData *)
|
|
{
|
|
}
|
|
inline void RTPSources::OnRTCPReceiverReport(RTPSourceData *)
|
|
{
|
|
}
|
|
inline void RTPSources::OnRTCPSDESItem(RTPSourceData *, RTCPSDESPacket::ItemType, const void *, std::size_t)
|
|
{
|
|
}
|
|
#ifdef RTP_SUPPORT_SDESPRIV
|
|
inline void RTPSources::OnRTCPSDESPrivateItem(RTPSourceData *, const void *, std::size_t, const void *, std::size_t)
|
|
{
|
|
}
|
|
#endif // RTP_SUPPORT_SDESPRIV
|
|
inline void RTPSources::OnAPPPacket(RTCPAPPPacket *, const RTPTime &, const RTPAddress *)
|
|
{
|
|
}
|
|
inline void RTPSources::OnUnknownPacketType(RTCPPacket *, const RTPTime &, const RTPAddress *)
|
|
{
|
|
}
|
|
inline void RTPSources::OnUnknownPacketFormat(RTCPPacket *, const RTPTime &, const RTPAddress *)
|
|
{
|
|
}
|
|
inline void RTPSources::OnNoteTimeout(RTPSourceData *)
|
|
{
|
|
}
|
|
inline void RTPSources::OnValidatedRTPPacket(RTPSourceData *, RTPPacket *, bool, bool *)
|
|
{
|
|
}
|
|
|
|
} // end namespace
|
|
|
|
#endif // RTPSOURCES_H
|
|
|