The old implementation has undefined behavior in it (unaligned read of uint32_t)
Now it's closer to the reference implementation:
https://tools.ietf.org/html/rfc6386#section-20.2
Also, added some comments and named some variables to make it more clear, that the
parser actually does.
Bug: chromium:1057551
Change-Id: I84c1912867e2794502e8a63302c938a0cbab2c4e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/169545
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30661}
ae92244054