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https://github.com/danog/libtgvoip.git
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92 lines
2.3 KiB
C++
92 lines
2.3 KiB
C++
//
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// Created by Grishka on 19.03.2018.
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//
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#include "PacketReassembler.h"
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#include "logging.h"
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#include <assert.h>
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using namespace tgvoip;
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PacketReassembler::PacketReassembler(){
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}
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PacketReassembler::~PacketReassembler(){
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}
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void PacketReassembler::Reset(){
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}
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void PacketReassembler::AddFragment(Buffer pkt, unsigned int fragmentIndex, unsigned int fragmentCount, uint32_t pts, bool keyframe){
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for(Packet& packet:packets){
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if(packet.timestamp==pts){
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if(fragmentCount!=packet.partCount){
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LOGE("Received fragment total count %u inconsistent with previous %u", fragmentCount, packet.partCount);
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return;
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}
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packet.AddFragment(std::move(pkt), fragmentIndex);
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return;
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}
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}
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if(pts<maxTimestamp){
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LOGW("Received fragment doesn't belong here (ts=%u < maxTs=%u)", pts, maxTimestamp);
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return;
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}
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if(fragmentIndex>=fragmentCount){
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LOGE("Received fragment index %u is out of bounds %u", fragmentIndex, fragmentCount);
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return;
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}
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if(fragmentCount>255){
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LOGE("Received fragment total count too big %u", fragmentCount);
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return;
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}
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maxTimestamp=std::max(maxTimestamp, pts);
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Packet packet(fragmentCount);
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packet.timestamp=pts;
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packet.isKeyframe=keyframe;
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packet.receivedPartCount=0;
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packet.AddFragment(std::move(pkt), fragmentIndex);
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packets.push_back(std::move(packet));
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while(packets.size()>3){
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Packet&& old=std::move(packets[0]);
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packets.erase(packets.begin());
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if(old.receivedPartCount==old.partCount){
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Buffer buffer=old.Reassemble();
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callback(std::move(buffer), old.timestamp, old.isKeyframe);
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//LOGV("Packet %u reassembled", old.timestamp);
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}else{
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LOGW("Packet %u not reassembled (%u of %u)", old.timestamp, old.receivedPartCount, old.partCount);
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}
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}
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}
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void PacketReassembler::SetCallback(std::function<void(Buffer packet, uint32_t pts, bool keyframe)> callback){
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this->callback=callback;
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}
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void PacketReassembler::Packet::AddFragment(Buffer pkt, uint32_t fragmentIndex){
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//LOGV("Add fragment %u/%u to packet %u", fragmentIndex, partCount, timestamp);
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parts[fragmentIndex]=std::move(pkt);
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receivedPartCount++;
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}
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Buffer PacketReassembler::Packet::Reassemble(){
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if(partCount==1){
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return std::move(parts[0]);
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}
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BufferOutputStream out(10240);
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for(unsigned int i=0;i<partCount;i++){
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out.WriteBytes(parts[i]);
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parts[i]=Buffer();
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}
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return Buffer(std::move(out));
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}
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