98 lines
2.6 KiB
C
98 lines
2.6 KiB
C
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//
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// libtgvoip is free and unencumbered public domain software.
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// For more information, see http://unlicense.org or the UNLICENSE file
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// you should have received with this source code distribution.
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//
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#ifndef LIBTGVOIP_JITTERBUFFER_H
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#define LIBTGVOIP_JITTERBUFFER_H
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#include <stdlib.h>
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#include <vector>
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#include <stdio.h>
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#include "MediaStreamItf.h"
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#include "BlockingQueue.h"
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#include "Buffers.h"
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#include "threading.h"
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#define JITTER_SLOT_COUNT 64
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#define JITTER_SLOT_SIZE 1024
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#define JR_OK 1
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#define JR_MISSING 2
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#define JR_BUFFERING 3
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namespace tgvoip{
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class JitterBuffer{
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public:
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JitterBuffer(MediaStreamItf* out, uint32_t step);
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~JitterBuffer();
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void SetMinPacketCount(uint32_t count);
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int GetMinPacketCount();
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unsigned int GetCurrentDelay();
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double GetAverageDelay();
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void Reset();
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void HandleInput(unsigned char* data, size_t len, uint32_t timestamp, bool isEC);
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size_t HandleOutput(unsigned char* buffer, size_t len, int offsetInSteps, bool advance, int& playbackScaledDuration, bool& isEC);
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void Tick();
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void GetAverageLateCount(double* out);
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int GetAndResetLostPacketCount();
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double GetLastMeasuredJitter();
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double GetLastMeasuredDelay();
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private:
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struct jitter_packet_t{
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unsigned char* buffer=NULL;
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size_t size;
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uint32_t timestamp;
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bool isEC;
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double recvTimeDiff;
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};
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static size_t CallbackIn(unsigned char* data, size_t len, void* param);
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static size_t CallbackOut(unsigned char* data, size_t len, void* param);
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void PutInternal(jitter_packet_t* pkt, bool overwriteExisting);
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int GetInternal(jitter_packet_t* pkt, int offset, bool advance);
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void Advance();
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BufferPool bufferPool;
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Mutex mutex;
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jitter_packet_t slots[JITTER_SLOT_COUNT];
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int64_t nextTimestamp=0;
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uint32_t step;
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double minDelay=6;
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uint32_t minMinDelay;
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uint32_t maxMinDelay;
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uint32_t maxUsedSlots;
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uint32_t lastPutTimestamp;
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uint32_t lossesToReset;
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double resyncThreshold;
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unsigned int lostCount=0;
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unsigned int lostSinceReset=0;
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unsigned int gotSinceReset=0;
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bool wasReset=true;
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bool needBuffering=true;
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HistoricBuffer<int, 64, double> delayHistory;
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HistoricBuffer<int, 64, double> lateHistory;
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bool adjustingDelay=false;
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unsigned int tickCount=0;
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unsigned int latePacketCount=0;
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unsigned int dontIncMinDelay=0;
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unsigned int dontDecMinDelay=0;
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int lostPackets=0;
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double prevRecvTime=0;
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double expectNextAtTime=0;
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HistoricBuffer<double, 64> deviationHistory;
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double lastMeasuredJitter=0;
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double lastMeasuredDelay=0;
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int outstandingDelayChange=0;
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unsigned int dontChangeDelay=0;
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double avgDelay=0;
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bool first=true;
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#ifdef TGVOIP_DUMP_JITTER_STATS
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FILE* dump;
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#endif
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};
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}
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#endif //LIBTGVOIP_JITTERBUFFER_H
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