sapenc: Pass the title on to the chained muxers

This makes sure it ends up in the SDP, providing a proper session name
in the SAP announcements.

Signed-off-by: Martin Storsjö <martin@martin.st>
flvenc: Check whether seeking back to the header succeeded

The FLV muxer tries to update the header in write_trailer, which is
impossible if writing to a pipe or network stream. Don't write header
data if seeking to the header fails.

Signed-off-by: Martin Storsjö <martin@martin.st>
rtp: Don't read priv_data unless it is allocated

This makes all users of rtpenc_chain (rtsp muxer, sapenc, mov
rtp hinting) work again, broken since 8034130e0.

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

Move some functions from dsputil. The idea is that videodsp contains
functions that are useful for a large and varied set of video decoders.
Currently, it contains emulated_edge_mc() and prefetch().

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
lavc: add missing files for arm

Across the many retouches those did not make the main commit.
miscellaneous typo fixes
build: avfilter: Remove duplicate compilation entry for vf_scale

vf_scale should not be unconditionally compiled even if disabled.
configure: Make avconv depend on null, anull and resample filters

Building avconv without that functionality makes little sense.
rtpdec: Pass the sequence number to depacketizers

This allows depacketizers to figure out if packets have been lost.

Signed-off-by: Martin Storsjö <martin@martin.st>
rtpdec_vp8: Don't return known-broken packets

This is built on the assumption that the first partition of each
VP8 packet is essential for decoding any later packet - if this
partition is broken/missed, the arithmetic coder gets out of sync
and decoding the bitstream in further packet ends up with total
garbage. If packets of a frame are lost, make sure the first
partition is intact (return only this part of the packet, nothing
else), otherwise stop returning data until the next keyframe is
received.

Alternatively, one would simply not return any packets at all
until the next keyframe, if packet loss is detected.

Signed-off-by: Martin Storsjö <martin@martin.st>
Merge commit 'a925f723a915bc0255e2673f8817af5212131763'

* commit 'a925f723a915bc0255e2673f8817af5212131763':
  rtp: Don't read priv_data unless it is allocated
  flvenc: Check whether seeking back to the header succeeded
  sapenc: Pass the title on to the chained muxers

Conflicts:
	libavformat/flvenc.c
	libavformat/sapenc.c

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

Signed-off-by: Paul B Mahol <onemda@gmail.com>
alsdec: cosmetics after previous commit

Signed-off-by: Paul B Mahol <onemda@gmail.com>
Merge commit '6906b19346ae8a330bfaa1c16ce535be10789723'

* commit '6906b19346ae8a330bfaa1c16ce535be10789723':
  lavc: add missing files for arm
  lavc: introduce VideoDSPContext

Conflicts:
	configure
	libavcodec/arm/dsputil_init_armv5te.c
	libavcodec/dsputil.c
	libavcodec/dsputil.h
	libavcodec/dsputil_template.c
	libavcodec/h264.c
	libavcodec/mpegvideo.h
	libavcodec/mpegvideo_enc.c
	libavcodec/x86/dsputil_mmx.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '511cf612ac979f536fd65e14603a87ca5ad435f3'

* commit '511cf612ac979f536fd65e14603a87ca5ad435f3':
  miscellaneous typo fixes

Conflicts:
	libavcodec/4xm.c
	libavcodec/lagarith.c
	libavcodec/parser.c
	libavcodec/ratecontrol.c
	libavcodec/shorten.c
	libavcodec/vda_h264.c
	libavformat/dvenc.c
	libavformat/wtv.c
	tools/patcheck

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '69f086e0f90f23d89e5739b099a4f984fa6a7885'

* commit '69f086e0f90f23d89e5739b099a4f984fa6a7885':
  build: avfilter: Remove duplicate compilation entry for vf_scale

Conflicts:
	libavfilter/Makefile

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '90c784cc13f6bf21a8eb69f3b88b50c7a70f6c59'

* commit '90c784cc13f6bf21a8eb69f3b88b50c7a70f6c59':
  rtpdec: Pass the sequence number to depacketizers
  configure: Make avconv depend on null, anull and resample filters

Conflicts:
	configure

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'c7d4de3d730473167e31cf765e0333c965f934d3'

* commit 'c7d4de3d730473167e31cf765e0333c965f934d3':
  rtpdec_vp8: Don't return known-broken packets

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Support H264 over video4linux2.

Tested-by: Val Malykh
Revert "Always write all colours for animated gif files, including transparent ones."

It breaks some opaque samples.

This reverts commit d4fdaafdb76a927be6fea15013807641bbcc6bd9.