Signed-off-by: Martin Storsjö <martin@martin.st>

This definition is in two files, since the definitions will move
to the private header at the next bump.
Signed-off-by: Martin Storsjö <martin@martin.st>

The interrupt callback has to be passed in during opening (setting it
after opening isn't enough), since a blocking open couldn't be
interrupted otherwise.

Options are passed down to procotols and also need to be available
during open() in most cases.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Not used anywhere yet, support for passing options from avio_open() will
follow.

Change all uses of these function to pass the relevant
callback on.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

This is a better io interrupt callback function, which has an
opaque parameter, which is given to the interrupt callback.

This allows callers to precisely cancel IO for one single
AVFormatContext, without interrupt other ones in the same
process.

Note, it's not needed in AVIOContext, at the moment.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Add missing multiple inclusion guards; clean up #endif comments;
add missing library prefixes; keep guard names consistent.

The new function is more flexible than url_exist(), as it allows to
specify which access flags to check, and does not require an explicit
open of the checked resource.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

There's no particular reason to pollute the namespace with a typedef for
it.

Signed-off-by: Mans Rullgard <mans@mansr.com>

Consistently apply this rule: the guard name is obtained from the
filename by stripping the leading "lib", converting '/' and '.'  to
'_' and uppercasing the resulting name. Guard names in the root
directory have to be prefixed by "FFMPEG_".

Originally committed as revision 15120 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 10765 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 9481 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 9356 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 9345 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 8672 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 8664 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 8663 to svn://svn.ffmpeg.org/ffmpeg/trunk

patch by Nicholas Tung, ntung ntung com

Originally committed as revision 8649 to svn://svn.ffmpeg.org/ffmpeg/trunk