taisel/IodineGBA

…d make it variable length, and only occur once per iteration).

Do a diff from start time to lower the required size to uint32.

Since the count can get updated outside of the critical section now.

Compatibility for Firefox Nightly

For some theoretically super rare possibility.

We were checking the wrong function for audio sample counts internally
in part of the glue code.

Fixed setting the internal buffer size from being twice what was
specified.

Moved the cross thread buffer checks to be inside the audio event
callback, to optimize it by lowering the required check rate.

Lowered the overall master timer rate used by the main thread and
worker from 4 to 7 millisecond.

mgba does this, but it’s still technically not what hardware does.
Hardware waits for the actual DMA to start for when it validates.
That’s why DMAs have a clock cycle delay when starting.

todo: move validation to start trigger and keep shadow registers around.

So it can be reset to original speed quickly.

xaudiojs update

Fast copy the shared typed array out to a separate array before
blitting, and release lock on critical section after the copy, but
before the blit.

Make the resampler only process samples after we release the lock.

ok something keeps resetting this