2008-07-16 16:35:59 +08:00
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//
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2008-07-25 17:08:15 +08:00
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// ZoneMinder RTP Source Class Interface, $Date$, $Revision$
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2008-07-25 17:33:23 +08:00
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// Copyright (C) 2001-2008 Philip Coombes
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2008-07-16 16:35:59 +08:00
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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//
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#ifndef ZM_RTP_SOURCE_H
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#define ZM_RTP_SOURCE_H
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#include "zm_buffer.h"
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#include "zm_thread.h"
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#include <sys/time.h>
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#include <string>
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struct RtpDataHeader;
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class RtpSource
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{
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public:
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typedef enum { EMPTY, FILLING, READY } FrameState;
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private:
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static const int RTP_SEQ_MOD = 1<<16;
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static const int MAX_DROPOUT = 3000;
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static const int MAX_MISORDER = 100;
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static const int MIN_SEQUENTIAL = 2;
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private:
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// Identity
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int mId; // General id (usually monitor id)
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std::string mCname; // Canonical name, for SDES
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// RTP/RTCP fields
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uint32_t mSsrc;
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uint16_t mMaxSeq; // highest seq. number seen
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uint32_t mCycles; // shifted count of seq. number cycles
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uint32_t mBaseSeq; // base seq number
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uint32_t mBadSeq; // last 'bad' seq number + 1
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uint32_t mProbation; // sequ. packets till source is valid
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uint32_t mReceivedPackets; // packets received
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uint32_t mExpectedPrior; // packet expected at last interval
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uint32_t mReceivedPrior; // packet received at last interval
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uint32_t mTransit; // relative trans time for prev pkt
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uint32_t mJitter; // estimated jitter
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2008-07-16 16:35:59 +08:00
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// Ports/Channels
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std::string mLocalHost;
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int mLocalPortChans[2];
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std::string mRemoteHost;
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int mRemotePortChans[2];
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// Time keys
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uint32_t mRtpClock;
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uint32_t mRtpFactor;
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struct timeval mBaseTimeReal;
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struct timeval mBaseTimeNtp;
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uint32_t mBaseTimeRtp;
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struct timeval mLastSrTimeReal;
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uint32_t mLastSrTimeNtpSecs;
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uint32_t mLastSrTimeNtpFrac;
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struct timeval mLastSrTimeNtp;
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uint32_t mLastSrTimeRtp;
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// Stats, intermittently updated
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uint32_t mExpectedPackets;
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uint32_t mLostPackets;
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uint8_t mLostFraction;
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Buffer mFrame;
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int mFrameCount;
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bool mFrameGood;
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ThreadData<bool> mFrameReady;
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ThreadData<bool> mFrameProcessed;
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private:
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void init( uint16_t seq );
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public:
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RtpSource( int id, const std::string &localHost, int localPortBase, const std::string &remoteHost, int remotePortBase, uint32_t ssrc, uint16_t seq, uint32_t rtpClock, uint32_t rtpTime );
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bool updateSeq( uint16_t seq );
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void updateJitter( const RtpDataHeader *header );
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void updateRtcpData( uint32_t ntpTimeSecs, uint32_t ntpTimeFrac, uint32_t rtpTime );
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void updateRtcpStats();
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bool handlePacket( const unsigned char *packet, size_t packetLen );
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uint32_t getSsrc() const
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{
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return( mSsrc );
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}
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void setSsrc( uint32_t ssrc )
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{
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mSsrc = ssrc;
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}
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bool getFrame( Buffer &buffer );
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const std::string &getCname() const
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{
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return( mCname );
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}
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const std::string &getLocalHost() const
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{
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return( mLocalHost );
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}
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int getLocalDataPort() const
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{
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return( mLocalPortChans[0] );
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}
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int getLocalCtrlPort() const
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{
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return( mLocalPortChans[1] );
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}
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const std::string &getRemoteHost() const
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{
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return( mRemoteHost );
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}
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int getRemoteDataPort() const
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{
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return( mRemotePortChans[0] );
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}
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int getRemoteCtrlPort() const
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{
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return( mRemotePortChans[1] );
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}
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uint32_t getMaxSeq() const
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{
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return( mCycles + mMaxSeq );
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}
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uint32_t getExpectedPackets() const
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{
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return( mExpectedPackets );
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}
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uint32_t getLostPackets() const
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{
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return( mLostPackets );
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}
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2010-07-05 02:00:35 +08:00
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uint8_t getLostFraction() const
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{
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return( mLostFraction );
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}
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2010-07-05 02:00:35 +08:00
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uint32_t getJitter() const
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{
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return( mJitter >> 4 );
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}
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2010-07-05 02:00:35 +08:00
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uint32_t getLastSrTimestamp() const
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{
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return( ((mLastSrTimeNtpSecs&0xffff)<<16)|(mLastSrTimeNtpFrac>>16) );
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}
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};
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#endif // ZM_RTP_SOURCE_H
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