We accessed the alpha array even it wasn't used and didn't
exist, hence leading to a NULL pointer segfault.
(cherry picked from commit bf2cba45)

We would use the second half of the U plane buffer, rather than the
V plane buffer, to output the V plane pixels.

For 9/10bit, it means we don't have to upscale to 16bit before
actual scaling or pixel format conversion, and thus a performance
gain.

* ronalds_buggy_gt8bit_sws:
  swscale: fix another yuv range conversion overflow in 16bit scaling. (cherry picked from commit 81cc7d0b)
  swscale: fix yuv range correction when using 16-bit scaling. (cherry picked from commit e0b8fff6)
  swscale: implement >8bit scaling support.

Conflicts:
	libswscale/swscale.c
	libswscale/utils.c
	libswscale/x86/swscale_template.c
	tests/ref/lavfi/pixdesc
	tests/ref/lavfi/pixfmts_copy
	tests/ref/lavfi/pixfmts_null
	tests/ref/lavfi/pixfmts_scale
	tests/ref/lavfi/pixfmts_vflip
Merged-by: Michael Niedermayer <michaelni@gmx.at>

(cherry picked from commit 81cc7d0b)

(cherry picked from commit e0b8fff6)

Fixes ticket302
The second hunk is from anatoly
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

All option parsing functions now match the function pointer signature through
which they are called (int f(const char *, const char *), thereby working
reliably on all platforms.
Prefix all option processing functions with opt_

The symbols was added in the git commit
51293367.

This means that precision is retained when scaling between sample
formats with >8 bits per component (48bit RGB, 16bit grayscale,
9/10/16bit YUV).

* qatar/master:
  rational-test: Add proper main() declaration to fix gcc warnings.
  configure: Add vdpau and dxva2 to configure results output.
  Remove unused, never built libavutil/pca.[ch]
  matroskadec: forward parsing errors to caller.
  av_find_stream_info: simplify EAGAIN handling.
  aacenc: Fix determination of Mid/Side Mode.
  psymodel: Remove the single channel analysis function
  aacenc: Implement dummy channel group analysis that just calls the single channel analysis for each channel.
  psymodel: Add channels and channel groups to the psymodel.
  ARM: remove check for PLD instruction
  fate: move amr[nw]b test rules into separate files
  ogg: fix double free when finding length of small chained oggs.
  swscale: implement >8bit scaling support.
  build: fix creation of tools dir with make 3.81
  build: Mark all-yes Makefile target as phony.
  pixfmt: fix YUV422/444 wrong endian comment
  build: create output directories as needed
  Add new yuv444 pixfmts to avcodec_align_dimensions2

Conflicts:
	Makefile
	configure
	libavutil/pca.c
	libavutil/pca.h
	libavutil/pixfmt.h
	libswscale/swscale.c
	libswscale/utils.c
	libswscale/x86/swscale_template.c
	tests/ref/lavfi/pixdesc
	tests/ref/lavfi/pixfmts_copy
	tests/ref/lavfi/pixfmts_null
	tests/ref/lavfi/pixfmts_scale
	tests/ref/lavfi/pixfmts_vflip
Merged-by: Michael Niedermayer <michaelni@gmx.at>

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

Signed-off-by: Mans Rullgard <mans@mansr.com>

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

In adjust_frame_information(), msc is incremented for each sfb in each
sub-window then compared against max_sfb which is for a single sub-window.

This resulted in frames using EIGHT_SHORT_SEQUENCE where the first few
sub-windows increment msc to a value that results in ms_mode == 2. Even
though only some of the bands are actually using Mid/Side.

aacenc: Implement dummy channel group analysis that just calls the single channel analysis for each channel.

PLD is present in ARMv5TE and later, which is checked for separately.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Signed-off-by: Mans Rullgard <mans@mansr.com>

ogg_save() copies streams[], but doesn't keep track of free()'ed
struct members. Thus, if in between a call to ogg_save() and
ogg_restore(), streams[].private was free()'ed, this would result
in a double free -> crash, which happened when e.g. playing small
chained ogg fragments.

This means that precision is retained when scaling between sample
formats with >8 bits per component (48bit RGB, 16bit grayscale,
9/10/16bit YUV).

GNU make 3.81 apparently does not support order-only prerequisites
with pattern rules, and thus fails to create the tools directory
if it is missing.  Naming the objects explicitly in the rule makes
it work properly.
Signed-off-by: Mans Rullgard <mans@mansr.com>

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