grakshith / p2psp-experiments

P2PSP Experiments

p2psp-experiments

This repository is aimed at experimenting certain things with the P2PSP protocol. Currently, the experiment is to run splitters in parallel that transmit the same video stream. The objective is to take advantage of this parallelization among the peers so that latency may be reduced and the protocol be made more error resilient.

STATUS

Synchronizer merged with upstream [here] (https://github.com/hehaichi/p2psp-console/blob/master/src/synchronizer.cc).

Only MPEG4-TS works as of now

VLC dropping frames

Synchronize function is now complete.

WIP on mixing various streams.

Working on the headers for the synchronized output

TODO

Extend synchronizer for all video formats Improve the performance Debugging Use mutexes wherever there is concurrent I/O

Create a new entity called Synchronizer that takes multiple streams from the peer and synchronizes them into one single stream and then feeds the player.

Develop Synchronizer.

Complete the remaining functionality

In the current implementation, although a set data structure is employed, there is a possibility of a duplicate chunk being added to the set. This happens when there is a delay between two synchronized peers. This happens because, as soon as the synchronized chunk is played, it is removed from the set.

• Define buffer size for the vector and use it like a circular queue

• Make the output playable by VLC

Last updated : 29 October, 2017 15:08:45 UTC+0530

p2psp-experiments's Issues

Race condition when peers of same team use synchronizer

There is a race condition when two (or more) peers of the same team try to connect with the splitter.
This happens because, one of the peers is declared the monitor peer and the others aren't. So when the other peers connect with the splitter before the monitor peer does, it leads to an error.
Race condition is prevalent here because, synchronizer tries to connect the peers to the splitters concurrently.