This change introduces basic support for HEVC decoding through vdpau.
Right now, there are problems with the nvidia driver/library implementation
that mean that frames are incorrectly laid out in memory when they are
returned from the decoder, and it is normally impossible to recover the
complete decoded frame due to loss of data from alignment inconsistencies.

I obviously hope that nvidia will be fixing it in due course - I've verified
the problems exist with their example application.

As such, this support is not useful for any real world application, but I
believe that it is correct (with the caveat that the mangled frames may hide
problems) and will work properly once the nvidia problem is fixed.

Right now it appears that any file encoded by x265 or nvenc is decoded
correctly, but that's because these files don't use a bunch of HEVC
features.

Quick summary:

Features that seem to work:

1) Short Term References
2) Scaling Lists
3) Tiling

Features with known problems:

1) Long Term References

It's hard to tell what's going on here. After I read the nvidia example
app that does not set the IsLongTerm flag on LTRs, and changed my code,
a bunch of frames using LTR started to display correctly, but there
are still samples with glitches that are related to LTRs.

In terms of real world files, both x265 and nvenc only use short term
refs from this list. The divx encoder seems similar.
Signed-off-by: Philip Langdale <philipl@overt.org>

This also reduces the amount of memory needed
Fixes Ticket4672

The new code seems slightly faster as well, probably due to better cache usage
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

STDERR_FILENO is not available on windows
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

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

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

Cross-compile toolchains without support for ranlib -D would fail.
This fixes the configure script to test the cross ranlib rather than the native ranlib.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: rogerdpack <rogerpack2005@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Electronic Arts VP6 files may contain two video streams: one for the
primary video stream and another for the alpha mask. The file format
uses identical data structures for both streams.
Signed-off-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This is required for the alpha stream demux patch.
Signed-off-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

write() suggested by wm4
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Reviewed-by: James Zern <jzern@google.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Result differs in pkt_duration and time_base.den for some reason.
Right now it tests only one example (adjusted to match the output).
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes infinite loop
Fixes Ticket4663
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes Ticket4656
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

Signed-off-by: Reynaldo H. Verdejo Pinochet <reynaldo@osg.samsung.com>

Signed-off-by: Reynaldo H. Verdejo Pinochet <reynaldo@osg.samsung.com>

Signed-off-by: Reynaldo H. Verdejo Pinochet <reynaldo@osg.samsung.com>

Signed-off-by: Reynaldo H. Verdejo Pinochet <reynaldo@osg.samsung.com>

Drop unneeded var and avoid checking for NULL twice as
ffurl_closep() already does this.
Signed-off-by: Reynaldo H. Verdejo Pinochet <reynaldo@osg.samsung.com>

Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: James Zern <jzern@google.com>

Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: James Zern <jzern@google.com>

* commit '5dbd491e':
  TextureDSP: fix erroneous condition which produced blocky output for DXT
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '4d554843':
  dds: Fix palette mode on big endian

Conflicts:
	libavcodec/dds.c

See: 21d2e3d6Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'ded5957d':
  segafilm: Remove deplanarization hack

Conflicts:
	libavformat/segafilm.c
	libavformat/version.h

See: 42b8f5fbMerged-by: Michael Niedermayer <michaelni@gmx.at>

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

* commit '5a79bf02':
  PCM signed 16-bit big-endian planar decoder

Conflicts:
	doc/general.texi
	libavcodec/Makefile
	libavcodec/allcodecs.c
	libavcodec/avcodec.h
	libavcodec/pcm.c
	libavcodec/version.h
	libavformat/nut.c

See: 9ba41ae6Merged-by: Michael Niedermayer <michaelni@gmx.at>

Fixes valgrind complaining about "Conditional jump or move depends on uninitialised value(s)"
Signed-off-by: James Almer <jamrial@gmail.com>

reduce memory needed for flags
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes Ticket4649
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Like the 5/3 case this is needed to avoid overflows and similarly for 16bpp
output pure 32bit operations are insufficient if high quality is wanted

Note, this code-path is only used in bitexact mode, so this should not
affect the speed of any real use-case
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This avoids a multiplication and 64bits
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This fixes overflows, using fewer bits would impact high bit depth quality

Fixes Ticket4654
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

Found-By: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

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

Reviewed-by: Lukasz Marek <lukasz.m.luki2 at gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>