This avoids high scores in random data that has a high 0x47 frequency

Fixes Ticket3844
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Based on commit fb1ddcdc by Luca Barbato <lu_zero@gentoo.org>
Adapted for libswresample by Michael Niedermayer
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* cus/stable:
  mpegts: always parse pcr
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Reviewed-by: James Darnley <james.darnley@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Reviewed-by: James Darnley <james.darnley@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Found-by: James Darnley <james.darnley@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Reviewed-by: James Darnley <james.darnley@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Reviewed-by: James Darnley <james.darnley@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Reviewed-by: James Darnley <james.darnley@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Ensure this is even the case if they are empty because
we failed adding the first entry.
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

Get rid of the many, slightly differing, implementations
of basically the same thing.
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

This allows getting rid of the many, slightly differing, implementations
of basically the same thing.
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

Previously pcr transmitted without payload but as part of the video stream was
not parsed.
Signed-off-by: Marton Balint <cus@passwd.hu>

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Based-on suggestion by JULIAN GARDNER <joolzg@btinternet.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This patch is the same as 8a1714ad but
applied to encoding. It fixes the current clash of the -password option
between tta decoder and the icecast protocol.

Reviewed-by: Clément Bœsch <u@pkh.me>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* commit '4b1f5e50':
  cosmetics: Write NULL pointer inequality checks more compactly

Conflicts:
	libavcodec/dvdsubdec.c
	libavcodec/h263dec.c
	libavcodec/libxvid.c
	libavcodec/rv10.c
	libavcodec/utils.c
	libavformat/format.c
	libavformat/matroskadec.c
	libavformat/segment.c
	libavutil/opt.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'f929ab05':
  cosmetics: Write NULL pointer equality checks more compactly

Conflicts:
	cmdutils.c
	ffmpeg_opt.c
	ffplay.c
	libavcodec/dvbsub.c
	libavcodec/dvdsubdec.c
	libavcodec/dvdsubenc.c
	libavcodec/dxa.c
	libavcodec/libxvid_rc.c
	libavcodec/mpegvideo.c
	libavcodec/mpegvideo_enc.c
	libavcodec/rv10.c
	libavcodec/tiffenc.c
	libavcodec/utils.c
	libavcodec/vc1dec.c
	libavcodec/zmbv.c
	libavdevice/v4l2.c
	libavformat/matroskadec.c
	libavformat/movenc.c
	libavformat/sdp.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'efd26bed':
  build: Add explanatory comments to (optimization) blocks in the Makefiles

Conflicts:
	libavcodec/ppc/Makefile
	libavcodec/x86/Makefile
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '835f798c':
  mpegvideo: cosmetics: Lowercase ugly uppercase MPV_ function name prefixes

Conflicts:
	libavcodec/h261dec.c
	libavcodec/intrax8.c
	libavcodec/mjpegenc.c
	libavcodec/mpeg12dec.c
	libavcodec/mpeg12enc.c
	libavcodec/mpeg4videoenc.c
	libavcodec/mpegvideo.c
	libavcodec/mpegvideo.h
	libavcodec/mpegvideo_enc.c
	libavcodec/rv10.c
	libavcodec/x86/mpegvideoenc.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

This avoids some theoretical memleaks
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

Signed-off-by: Diego Biurrun <diego@biurrun.de>

* commit 'a6a27fed':
  vfwcap: Replace deprecated av_destruct_packet() by av_free_packet()
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '7c371754':
  atomic_win32: Drop unnecessary atomic.h #include
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '6baeadd1':
  w32pthreads: Mark functions in compatibility wrapper as av_unused

Conflicts:
	compat/w32pthreads.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Diego Biurrun <diego@biurrun.de>

* commit '7ccb847f':
  http: Reduce scope of a variable in parse_content_encoding()
Merged-by: Michael Niedermayer <michaelni@gmx.at>

The file does not require atomic.h. Also kills function redefinition warnings.

This avoids annoying warnings about unused functions. The compatibility
wrapper is designed to provide a complete (stub) API, so some functions
being unused by some files is natural and no reason for a warning.

Also fixes an unused variable warning with zlib disabled.

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

The issue is that, when the main packet data buffer is changed, streamcopy
uses a temporary new packet to store that buffer, frees the old packet, and
replace it with the new packet.

However, in doing so, it forgets about the side data, which gets freed, but
is still needed and referenced. Then, when the packet gets freed again in
the normal code path, it attempts to free its side data which has already
been freed.

Therefore, simply avoid the first free on side data by removing that side
data from the packet.

Fixes ticket #3773.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

* commit '552bc42d':
  h261dec: Fix order of initialization
Merged-by: Michael Niedermayer <michaelni@gmx.at>