* commit 'c6ebc9fa':
  configure: add check_insn function
  configure: clean up check_inline_asm and check_as functions
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'f0fe245b':
  configure: arm: set fast_clz and fast_unaligned in cpuflags section
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '1234c66a':
  configure: arm: detect toolchain default arch version
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '9ebd45c2':
  configure: do not bypass cpuflags section if --cpu not given
  dct-test: arm: indicate required cpu features for optimised funcs
  snow: fix build after 594d4d5d
  arm: fix use of uninitialised value in ff_fft_fixed_init_arm()
  avpicture: Don't assume a valid pix fmt in avpicture_get_size

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

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

Triggered by the sample for trac ticket #1726.

While here remove ff_lzw_cur_ptr() as it become obsolete.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

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

The formating can and should be improved.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Reviewed-by: Stefano Sabatini <stefasab@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

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

Improve consistency/readability.

Avoid one dereference, simplify.

Fix crash, for example in the command:
ffmpeg -f image2 -vcodec pgmyuv -i tests/vsynth1/%02d.pgm \
  -vf "[in]format=yuv420p,split,alphamerge,split[o3][o4];
       [o4]vflip,alphaextract[alpha];[o3][alpha]alphamerge[out]" \
  -vcodec rawvideo -f nut md5:

The code causes uninitialized data copy, and may be actually slower than
a loop over each line in case the padding is big.

Such packets are useless.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

The check_insn function tests an instruction in both inline asm and
standalone assembly, and sets _external/_inline config properties
accordingly.
Signed-off-by: Mans Rullgard <mans@mansr.com>

These are properties of the targeted core and do not depend on
specific assembly support in the toolchain which if missing will
render the controlling options here disabled.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Probe for the toolchain default architecture version if no --cpu flag
is present or an unknown cpu is specified.  Works with gcc, clang and
armcc.

This allows configuring based on the arch version even if it is not
explicitly specified to configure.  It also causes an explicit -march
flag to be added to CFLAGS and ASFLAGS, which in turn lets us do
proper instruction set tests with the assembler.
Signed-off-by: Mans Rullgard <mans@mansr.com>

This will allow arch-specific ways of determining the target
variant when none is specified on the command line.
Signed-off-by: Mans Rullgard <mans@mansr.com>

The check_inline_asm function should check the actual C compiler,
not the one used for assembly files.  Usually these are the same,
but they might be different, typically when using a compiler other
than gcc.

The check_as should, as its name suggests, test the type of input
the AS command is used with, i.e. a standalond assembly (.S) file.

Finally, check for gnu assembler using the modified check_as as
this reflects actual usage.
Signed-off-by: Mans Rullgard <mans@mansr.com>

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

* qatar/master:
  h264: add a pointer for weighted prediction temporary buffer

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

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

Signed-off-by: Martin Storsjö <martin@martin.st>
Signed-off-by: Clément Bœsch <ubitux@gmail.com>

Merge get_scale/get_shift into set_sample_rate_params().
Rename tak_set_bps to set_bps_params and remove 2nd argument.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

* commit 'd7d6efe4':
  h264: check sps.log2_max_frame_num for validity
  mov: validate number of DataReferenceBox entries against box size
  mov: compute avg_frame_rate only if duration is known
  flac: change minimum and default of lpc_passes option to 1

Conflicts:
	libavcodec/h264_ps.c
	libavformat/mov.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'c25fc5c2':
  fate: dpcm: Add dependencies
  SBR DSP x86: implement SSE sbr_hf_gen
  AAC SBR: use AVFloatDSPContext's vector_fmul
  fate: image: Add dependencies
  Changelog: add an entry for deprecating the avconv -vol option
  x86: float_dsp: fix compilation of ff_vector_dmul_scalar_avx() on x86-32

Conflicts:
	Changelog
	libavutil/x86/float_dsp.asm
	tests/fate/image.mak
Merged-by: Michael Niedermayer <michaelni@gmx.at>

When initialising an FFTContext for a plain FFT, mdct_bits is not set
and can contain a garbage value.  Since nbits is always valid and for
MDCT operation is mdct_bits - 2 checking this instead avoids using an
uninitialised value while having the same effect.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Inspired by 92b8c9d8.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

Fixes out of array reads

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

When called from the v4l2 input device, pix_fmt can be
AV_PIX_FMT_NONE (for jpeg formats). Before 50ba57e0, this wasn't
an issue for avpicture_get_size, but after that commit, this
lead to crashes.
Signed-off-by: Martin Storsjö <martin@martin.st>

Reusing MpegEncContext's obmc_scratchpad for this becomes a mess with
adaptive frame-mt.

Fixes infinite or long taking loop in frame num gap code in
the fuzzed sample bipbop234.ts_s223302.

CC: libav-stable@libav.org