* 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>

* commit 'b869eea7':
  h263dec: Fix order of initialization
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '998c9f15':
  idct: remove call to ff_idctdsp_init from ff_MPV_common_init

Conflicts:
	libavcodec/dnxhdenc.c
	libavcodec/h263dec.c
	libavcodec/mpegvideo.c
	libavcodec/mpegvideo.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Fixes some unused variable warnings
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

This should help to clarify the API.
Reviewed-by: Christophe Gisquet <christophe.gisquet@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* cigaes/master:
  lavfi/avf_showspectrum: check RDFT context init.
  lavfi/avf_showspectrum: add full frame sliding mode.
  lavfi/avf_showspectrum: use automatic framing.
  lavfi/avf_showspectrum: do not push the frame at EOF.
  lavfi/avf_showspectrum: fix output pts computation.
  lavfi/avf_showspectrum: set output frame rate.
Merged-by: Michael Niedermayer <michaelni@gmx.at>

ff_MPV_common_init requires the frame dimensions which get parsed in
h261_decode_picture_header.

ff_MPV_common_init requires the frame dimensions which get parsed in
*_decode_picture_header.

One step in untangling the mpegvideo code and fixing some problems in
the order that initialization is being done in h263dec and h261dec.

Fixes assertion failure
Fixes: test42f.jpg
Found-by: Piotr Bandurski <ami_stuff@o2.pl>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

The encoder produces files that are no longer compatible with previous
versions of the decoder, and may actually cause decoding issues for other
software, so indicate that change to allow decoder quirks.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes out of array read
Fixes: yuv111_no_compr_crash.avi
Found-by: Piotr Bandurski <ami_stuff@o2.pl>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fix a segfault with large window size.

The framework can ensure that each input frame has exactly
the correct number of samples, except the last one.

The packet buffer allocation considered as dct-coded, while it is
actually run-coded and thus requires a larger buffer.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>