* qatar/master: (28 commits)
  Remove some non-compiling debug messages.
  ffplay: Fix non-compiling debug printf and replace it by av_dlog.
  H264: x86 predict init cosmetics.
  ac3enc: Fix linking of AC-3 encoder without the E-AC-3 encoder.
  Move E-AC-3 encoder functions to a separate eac3enc.c file.
  ac3enc: remove convenience macro, #define DEBUG
  ac3enc: remove unused #define
  vc1: re-initialize tables after width/height change.
  APIchanges: fill-in git commit hash for av_get_bytes_per_sample() addition
  samplefmt: add av_get_bytes_per_sample()
  iirfilter: fix biquad filter coefficients.
  swscale: remove duplicate conversion routine in swScale().
  swscale: add yuv2planar/packed function typedefs.
  swscale: integrate yuv2nv12X_C into yuv2yuvX() function pointers.
  swscale: reindent x86 init code.
  swscale: extract SWS_FULL_CHR_H_INT conditional into init code.
  swscale: cosmetics.
  swscale: remove alp/chr/lumSrcOffset.
  swscale: un-special-case yuv2yuvX16_c().
  shorten: Remove stray DEBUG #define and corresponding av_dlog statement.
  ...

Conflicts:
	doc/APIchanges
	libavcodec/ac3enc.c
	libavutil/avutil.h
	libavutil/samplefmt.c
	libswscale/swscale.c
	libswscale/swscale_internal.h
	libswscale/x86/swscale_template.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

The options -loglevel LEVEL -debug FLAGS can be used for achieving the
same objectives, with a finer level of control.

Use -vismv 1 instead. Simplify.

Change indentation and whitespace; also move HAVE_YASM blocks.
Signed-off-by: Diego Biurrun <diego@biurrun.de>

The AC-3 encoder unconditionally references some symbols from the E-AC-3
encoder; make those references conditional to fix linking.

read_sequence_header can change width/height; therefore, re-initialize
all tables if width/height changed
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Deprecate av_get_bits_per_sample_fmt(), which was a misnamed function.

For the moment we don't have sample formats with a non-integer number
of bytes, in that case we may need to create a new
av_get_bits_per_sample() function. In the meanwhile we prefer to adopt
this variant, since avoids divisions by 8 all over the place.

Fixes Ticket269
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

The current filter implementation should only have the cx coefficients
divided by gain in order to give the correct output scale.

They are hacks added to reuse the same scaling function for
different formats and they may cause problems when SIMD
implementation of the same functions are used along with pure
C functions.

Make yuv2yuvX16_c a function pointer for yuv2yuvX(), so that the
function pointer becomes bitdepth-independent.

It was errouneously changed to "NTSC" by the recent merge commit.

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

The option is disabled by default, so enabling it should be documented.

Use av_get_pix_fmt_name() rather than access
av_pix_fmt_descriptors. Improve readability.