play fires before loadstart on Win8 RT, IE 10

[dmlap]

Discovered on Win8 RT, IE 10 but seems to be happening in Chrome on OSX as well. If play() is called programmatically immediately after setting a source, it may fire before loadstart and cause the big play button to stay up. Example on jsfiddle.

[heff]

This is related to a few other open issues. Working on a fix now.

[dmlap]

All of these issues seem to boil down to race conditions on loadstart. I think triggering the loadstart handler synchronously during player init (something like #1208) would be safer.

[heff]

Yeah, @mmcc helped me think through this one and the conclusion was that the code assumes the play event comes after the loadstart event, which is wrong in a lot of cases, as you've found. So I'm reworking the code to take that into account.

The fun comes in that we have to use the loadstart event to know that we're working with a new source and reset the player (including the firstplay listener), but the (first) play event may have come before that loadstart. Kind of a chicken and egg? It's a potential plus on the side of creating a srcchange type event (#1194), but at the same time it shows what fun inventing new events (firstplay) can lead too...

[heff]

Can you review this one? #1271

[heff]

Closed by #1271