[FFmpeg-cvslog] In retry_transfer_wrapper, do not check url_interrupt_cb,

[Nicolas George]

Le quartidi 14 vent?se, an CCXIX, Martin Storsj? a ?crit?:
> Perhaps a fix which would match the old behaviour more closely wold be to 
> move the url_interrupt_cb() check down, either into the if (EAGAIN) 
> branch, or at least to after transfer_func has been called. That way, 
> url_interrupt_cb() triggering won't make writes to local files fail, which 
> wouldn't have blocked anyway.

I believe the attached patch fixes things.

I am not quite happy with the whole thing, but I believe this can not be
avoided: we are in the situation of the unstoppable bullet hitting the
unbreakable armor: url_read_complete and url_write both guarantee to
read/write all the requested data unless something fatal happened, while
url_interrupt_cb guarantees to interrupt any transfer. In the end,
url_interrupt_cb wins, but it necessarily kills the protocol context.

Regards,

-- 
  Nicolas George
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