qin-player

Introduction

Qin Player is a module which allows to playback Motion JPEG videos, live streams, and videos that
clappr offers to play.

Structure

Qin Player determines a playback strategy based on the video source specified in constructor's
argument. This implies that the first layer of Qin's interface applies strategy pattern,
where the abstract strategy is named PlaybackStrategy and the concrete strategies are:
- ClapprPlaybackStrategy - _.mp4, .m3u8, ..._
- MjpgPlaybackStrategy - _.avi_
- MjpgLiveStrategy - _Motion JPEG live stream on HTTP_

##### Clappr Playback Strategy
ClapprPlaybackStrategy is trivial for it is an implementation of clappr's usage. See more from
clappr.io.

##### MJPG Playback Strategy
MjpgPlaybackStrategy is implemented as a state machine.

The states are:
- Init
- Buffering,
- Buffered,
- Playing,
- Paused,
- Stopped,
- PlaybackCompleted.

The transitions involve:
- seek(),
- play(),
- pause(),
- stop().

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##### MJPG Live Strategy
MjpgLiveStrategy realizes its behaviors by inserting http://.../.mjpg source into DOM with the
help of TabManager.