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https://github.com/danog/libtgvoip.git
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3216b76349
Better jitter buffer with packet rescaling Tried to fix some issues on Linux (telegramdesktop/tdesktop#3413) Fixes for Windows Phone
96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
//
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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 "BufferPool.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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struct jitter_packet_t{
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unsigned char* buffer;
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size_t size;
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uint32_t timestamp;
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double recvTimeDiff;
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};
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typedef struct jitter_packet_t jitter_packet_t;
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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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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);
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size_t HandleOutput(unsigned char* buffer, size_t len, int offsetInSteps, int* playbackScaledDuration);
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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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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);
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int GetInternal(jitter_packet_t* pkt, int offset);
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void Advance();
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BufferPool bufferPool;
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tgvoip_mutex_t mutex;
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jitter_packet_t slots[JITTER_SLOT_COUNT];
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int64_t nextTimestamp;
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uint32_t step;
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uint32_t minDelay;
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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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int lostCount;
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int lostSinceReset;
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int gotSinceReset;
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bool wasReset;
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bool needBuffering;
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int delayHistory[64];
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int lateHistory[64];
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bool adjustingDelay;
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unsigned int tickCount;
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unsigned int latePacketCount;
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unsigned int dontIncMinDelay;
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unsigned int dontDecMinDelay;
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int lostPackets;
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double prevRecvTime;
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double expectNextAtTime;
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double deviationHistory[64];
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int deviationPtr;
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double lastMeasuredJitter;
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double lastMeasuredDelay;
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int outstandingDelayChange;
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unsigned int dontChangeDelay;
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double avgDelay;
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//FILE* dump;
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};
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}
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#endif //LIBTGVOIP_JITTERBUFFER_H
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