Conflicts:

	configure

* commit '82ca17ac':
  configure: Fix vaapi/vda/vdpau dependency declarations

Conflicts:
	configure
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '215cdd35':
  configure: Refactor dxva2api.h dependency declarations

Conflicts:
	configure
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

If there is unsupported subsampling encountered abort
early instead of failing decoding later.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

* commit '4cc4b33f':
  build: Add proper infrastructure for adding and checking host CPPFLAGS

Conflicts:
	Makefile
	configure
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '2aac411f':
  configure: Simplify VDPAU header check

Conflicts:
	configure

Not merged as the code seems not to work
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '9840130e':
  configure: Simplify VDA header and extralibs check

Conflicts:
	configure
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '0a8da1a3':
  configure: Do not redundantly list enabled hwaccel libs
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '7432e872':
  configure: Add print_3_columns helper function and use where appropriate
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '040c565e':
  doc: developer: Allow tabs in the vim configuration for Automake files
  Remove pointless av_cold attributes in header files

Conflicts:
	libavcodec/h264.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Using the table directly may cause problems on some platforms like msvc
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'b5f536d2':
  pnm: add high-bitdepth PGMYUV support for both encoder and decoder

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

* commit '2f325a6f':
  libx264: change i_qfactor to use x264cli's default
  qtrle: use AV_LOG_ERROR in an error message.

Conflicts:
	libavcodec/libx264.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '7b4f9115':
  qtrle: cosmetics, reformat CHECK_PIXEL_PTR() macro
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'e1065924':
  qtrle: add more checks against pixel_ptr being negative.

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

* commit '4f3b058c':
  cavs: initialize various context tables to 0
  mlpdec: do not try to allocate a zero-sized output buffer.
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '56daf10e':
  mov: use the format context for logging.
  flicvideo: avoid an infinite loop in byte run compression
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Useful for testing seek implementations.

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

* commit '067432c1':
  loco: check that there is data left after decoding a plane.
  lagarith: avoid infinite loop in lag_rac_refill()

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

* commit 'f935aca4':
  av_memcpy_backptr: avoid an infinite loop for back = 0
  4xm: check the return value of read_huffman_tables().

Conflicts:
	libavcodec/4xm.c
	libavutil/mem.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

The following commit:
b97d61f9 avfilter/ff_merge_formats: only merge if doing so does not loose chroma or alpha
introduced an exception to avoid lossy conversions.
Add a comment to explain the logic.
Fix the call to avoid applying it on audio formats.

Fix trac ticket #2139.

Reviewed-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Reviewed-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This allows more complete checks
Reviewed-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Otherwise even a tiny file can trigger a huge memory allocation.

Related to ticket #2298.
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

This significantly reduces the memory needed per AVStream when the
array is not needed.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes out of array accesses
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>