doc: Document segment_list_type
rtsp: Factor out fmtp parsing
rtsp: Support misordered fmtp rtpmap

Issue present in Avigilon IP cameras.
hevc: Mark num_bins_in_se as unused

Only its size is actually used. Silence a clang warning.
doc/bitstream_filters: document imxdump

Partially addresses ticket #3198.

Signed-off-by: Lou Logan <lou@lrcd.com>
Tested-by: Dave Rice <dave@dericed.com>
dsputil: Split clear_block*/fill_block* off into a separate context
Merge commit '49a242687cf44f86570b706db3c5912ff06bc6c2'

* commit '49a242687cf44f86570b706db3c5912ff06bc6c2':
  doc: Document segment_list_type

Conflicts:
	doc/muxers.texi

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'c9c1e00f95350e7a36b0d05a03939c7f6438e371'

* commit 'c9c1e00f95350e7a36b0d05a03939c7f6438e371':
  rtsp: Factor out fmtp parsing

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'c385313d2590fd26e26bb9bdacddef78162ab490'

* commit 'c385313d2590fd26e26bb9bdacddef78162ab490':
  rtsp: Support misordered fmtp rtpmap

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '869fc416f7c78ed4e397e0208acd1545771c0502'

* commit '869fc416f7c78ed4e397e0208acd1545771c0502':
  hevc: Mark num_bins_in_se as unused

Merged-by: Michael Niedermayer <michaelni@gmx.at>
ppc: Fix the bug of fft for little endian environment on POWER7 and later

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'e74433a8e6fc00c8dbde293c97a3e45384c2c1d9'

* commit 'e74433a8e6fc00c8dbde293c97a3e45384c2c1d9':
  dsputil: Split clear_block*/fill_block* off into a separate context

Conflicts:
	configure
	libavcodec/asvdec.c
	libavcodec/dnxhddec.c
	libavcodec/dnxhdenc.c
	libavcodec/dsputil.h
	libavcodec/eamad.c
	libavcodec/intrax8.c
	libavcodec/mjpegdec.c
	libavcodec/ppc/dsputil_ppc.c
	libavcodec/vc1dec.c
	libavcodec/x86/dsputil_init.c
	libavcodec/x86/dsputil_mmx.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/x86/lossless_videodsp: Fix size of values read for left/left_top

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
huffyuv: change statistics initialization

Normally, a Laplace distribution is more typical of the residuals
encoded, but for noisy input, it's both better and simpler to be
safe and use a 1/d^2 distribution. Second hunk could use some
renormalization but it has effectively little impact.

Output size of ffvhuff on various 4:2:0 sequences:
context=0,1/d:    851974   27226   1137281
context=0,1/d²:   619081   25069   1051500
context=0,1/d³:   501983   30454   1290561
context=0,lapl:   500650   31754   1304082

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