* qatar/master:
  lavf: pass options from AVFormatContext to avio.
  avformat: Use avio_open2, pass the AVFormatContext interrupt_callback onwards
  avio: add avio_open2, taking an interrupt callback and options
  avio: add support for passing options to protocols.
  avio: add and use ffurl_protocol_next().
  avformat: Pass the interrupt callback on to chained muxers/demuxers
  avio: Add an AVIOInterruptCB parameter to ffurl_open/ffurl_alloc
  avformat: Use ff_check_interrupt
  avio: Add an internal utility function for checking the new interrupt callback
  avio: Add AVIOInterruptCB
  texi2html: remove stray \n
  doc: prettyfy the texi2html documentation
  swscale: handle unaligned buffers in yuv2plane1

Conflicts:
	libavformat/avformat.h
	libavformat/avio.c
	libavformat/mov.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Once we bailed out we calculate the exact iteration in which it would have happened if needed.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Use log(sqrt(mb->bailout)) instead of log(mb->bailout) because mb->bailout represent
the bailout radius squared, and then simplify the two sqrt().
This is also slightly faster.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This allows us to remove a if() and a variable assignment.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

previous calculated pixel, this is more accurate due to the last
calculated often being farther away.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

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.

There are a few more cases of chained demuxers, but they
only use custom IO which don't do any blocking IO and thus
don't need the callback.

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>

Single-quoted strings are printed verbatim in perl.

make it use the website css and start structuring it so it is consistent

The issue had been introduced in
c4356536Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Requested-by: Baptiste Coudurier
Approved-by: David Conrad
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>