about 1ms faster startup time
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This reduces the amount of duplicated code
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

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

* qatar/master:
  webp: add a special case for a huffman table with only 1 symbol
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'f51e3a19':
  webp: do not call av_frame_free() on the user-provided frame
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'b73a8922':
  ljpegenc: split yuv encoding into a separate function

Conflicts:
	libavcodec/ljpegenc.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'fa447681':
  ljpegenc: split bgr encoding into a separate function

Conflicts:
	libavcodec/ljpegenc.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'daffed3b':
  ljpegenc: accept bgr24 instead of bgra

Conflicts:
	libavcodec/ljpegenc.c
	libavcodec/mjpegenc.c

Only whitespace merged, we continue to support both formats
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '0cdbc4d3':
  ljpegenc: rename the encoding function.
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '72c0b8f7':
  ljpeg: remove a commented-out line
Merged-by: Michael Niedermayer <michaelni@gmx.at>

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

* commit '24abd806':
  ljpegenc: deMpegEncContextize

Conflicts:
	libavcodec/ljpegenc.c
	libavcodec/mpegvideo.h
	libavcodec/mpegvideo_enc.c
	tests/ref/vsynth/vsynth1-ljpeg
	tests/ref/vsynth/vsynth2-ljpeg
Merged-by: Michael Niedermayer <michaelni@gmx.at>

This avoids a use of MpegEncContext
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

This will be used by ljpeg
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

* commit '86eb2eaa':
  mjpegenc: do not pass MpegEncContext to ff_mjpeg_encode_dc()

Conflicts:
	libavcodec/mjpegenc.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '3360ad99':
  mjpegenc: do not pass MpegEncContext to ff_mjpeg_encode_picture_trailer()

Conflicts:
	libavcodec/ljpegenc.c
	libavcodec/mjpegenc.c
	libavcodec/mjpegenc.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '058d5f2f':
  mjpegenc: do not pass MpegEncContext to ff_mjpeg_encode_picture_header()

Conflicts:
	libavcodec/mjpegenc.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

The file now contains both source and filter, the new name looks more
appropriate.

Use last expression for the missing channel expressions in case the
channel layout was specified. Enhance flexibility.

Replace the inline awk script with a Perl script which tracks the
dependencies recursively.

This allows to correctly track dependencies for files including files
with a second level include (for example: ffmpeg-devices.texi ->
devices.texi -> outdevs.texi).

This also adds a dependency on perl for computing the dependencies, which
should not be a problem since perl is already required all the way for
building documentation.

This is a variant of commit 628ceac6
which was reverted due to out-of-tree build failure.

* commit '6d70639c':
  mjpegenc: do not pass MpegEncContext to jpeg_table_header()
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'e1eaaec7':
  mjpegenc: remove commented out never-to-be-finished WIP cruft

Conflicts:
	libavcodec/mjpegenc.c

The unfinished 2-matrix code is left in place and not removed
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'ff506c75':
  mjpegenc: do not pass MpegEncContext to put_huffman_table()
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'a1ba1f20':
  mjpegenc: cosmetics, reformat jpeg_put_comments()

Conflicts:
	libavcodec/mjpegenc.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '0812f5a4':
  mjpegenc: write the JFIF header if the sample aspect ratio is set

Conflicts:
	libavcodec/mjpegenc.c

See: f3ce748dMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '66499f34':
  mpegvideo: do not set current_picture_ptr in decoders

Conflicts:
	libavcodec/mss2.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '58a86896':
  FATE: drop the last partial frame in the wmv8-drm test

Conflicts:
	tests/ref/fate/wmv8-drm
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'ac1fc92e':
  vc1dec: move setting repeat_pict after frame_start() has been called.

Conflicts:
	libavcodec/vc1dec.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '282c6a1a':
  mpegvideo: make ff_release_unused_pictures() static
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'c99307ca':
  mpegvideo: make frame_size_alloc() static.
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '0b0a7a75':
  mpegvideo: move encode-only parts of common_end() to encode_end()

Conflicts:
	libavcodec/mpegvideo.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'd0d111d0':
  mpegvideo: remove commented out cruft from ff_MPV_frame_end()

Conflicts:
	libavcodec/mpegvideo.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

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

* commit '381a7225':
  mpegvideo: split the encoding-only parts of ff_MPV_frame_end() into a separate function

Conflicts:
	libavcodec/mpegvideo.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

The vlc reader cannot handle 0-bit huffman codes. For most
situations WebP uses the "simple" huffman coding for this case,
but that will only handle symbols up to 255. For the LZ77 distance
codes, larger symbol values are needed, so it can happen in rare
cases that a normal huffman table is used that only has a single
symbol.

Fixes double-free on error.