fate: Split fate-pixdesc tests and dispatch them through Make

This allows running all the tests individually and/or in parallel.
ppc: idctdsp: Immediately return if no AltiVec is available

This is how all the other init functions operate.
idct: Split off Xvid IDCT

The Xvid IDCT is only required to decode some Xvid-encoded MPEG-4 files,
so there is no point in having it as an unconditional part of idctdsp.
h264: remove useless assignment.

source index, as well as dest one, is unconditionnaly set afterwards,
before being effectively used.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
h264_mp4toannexb_bsf: always set idr_sps_pps_seen when SPS/PPS is seen.

In order not to break a sequence like "SPS IDR SPS IDR", the boolean
telling that the SPS/PPS has been seen should always be set.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Add forgotten APIchanges entry for probesize2.

Update some git hashes.
Fix standalone compilation of the WebVTT decoder.
pngenc: Drop pointless pointer cast in png_write_row()
tscc: Eliminate pointless variable indirections in decode_frame()
Revert "vf_interlace: deprecate lowpass option"

This reverts commit 35b05c5184fb3aa1191e2d1e7f1cae1e11f344a4.
A warning is introduced in case this option is used.
pngdec: correctly indent macros
pixdesc: K&R formatting cosmetics

Also change some comments to multiline.

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
h264: prevent theoretical infinite loop in SEI parsing

Properly address CVE-2011-3946 and parse bitstream as described in the spec.

CC: libav-stable@libav.org
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
avfilter/vf_pullup: 2nd try to workaround gcc 4.4.3 bug on arm

The first try failed to work with some build flags

The gcc version affected is very old and unmaintained AFAIK thus i made no
attempt to report this to the gcc developers.

The workaround is pushed as it may still affect users and does affect one
fate client

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '706208ef47bffd525c982975d2756f7b2b220b8d'

* commit '706208ef47bffd525c982975d2756f7b2b220b8d':
  fate: Split fate-pixdesc tests and dispatch them through Make

Conflicts:
	tests/fate-run.sh
	tests/ref/fate/filter-pixdesc

Merged-by: Michael Niedermayer <michaelni@gmx.at>
flv: Index the audio stream

And leverage the video index if the video is just disabled as wm4
did in an initial patch.
Merge commit '03c9f357a4c2307a7913cea2cbf0ba817e80beb6'

* commit '03c9f357a4c2307a7913cea2cbf0ba817e80beb6':
  ppc: idctdsp: Immediately return if no AltiVec is available

Conflicts:
	libavcodec/ppc/idctdsp.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'a786c8259dafeca9744252230b5d78f67810770c'

* commit 'a786c8259dafeca9744252230b5d78f67810770c':
  idct: Split off Xvid IDCT

Conflicts:
	libavcodec/Makefile
	libavcodec/mpeg4videodec.c
	libavcodec/x86/Makefile
	libavcodec/x86/idctdsp_init.c

This split is somewhat restructured leaving the xvid IDCT available
outside mpeg4 if manually selected.

The code also could not be merged unchanged as it conflicted with a
bugfix in FFmpeg

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '5735552f1f17ea01dcbc99b08f54b5bf52176a8f'

* commit '5735552f1f17ea01dcbc99b08f54b5bf52176a8f':
  pngenc: Drop pointless pointer cast in png_write_row()

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '4da8cdbb91ddbac118b79076cad4dc28ba72e86f'

* commit '4da8cdbb91ddbac118b79076cad4dc28ba72e86f':
  tscc: Eliminate pointless variable indirections in decode_frame()

Conflicts:
	libavcodec/tscc.c

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