Improve usability and robustness.

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

* qatar/master:
  fate: fft: Fix libavcodec dependency
  build: Make the ISMV muxer select the MOV muxer
  configure: move arm arch extensions to a separate variable

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

* commit 'e816034a':
  fate-seek: remove use of gnu make 3.82 only private modifier
  fate: move vsynth reference files to their own directory
  fate: move fate-acodec reference files to their own dir
  configure: avplay now depends on avresample
  fate: split dependencies for fate-seek tests

Conflicts:
	configure
	tests/fate/seek.mak
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '0b300daa':
  h264: error out on unset current_picture_ptr for h->current_slice > 0
  avprobe: report per stream bit rate if set by the decoder
  aac: avoid a memcpy in sbr_qmf_analysis

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

Fixes out of array reads

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

They share the same code, so building one w/o the other makes no sense.

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

Each fate-seek test depends now only on the corresponding fate-acodec,
fate-vsynth2 or fate-lavf test which creates the file seek-tests
operates on. The tests and references are renamed to match the test they
depend on.

Fixes a segfault with fuzzed sample sample_varPAR_s11622_r001-02.avi.

CC: libav-stable@libav.org

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

Swapping buffer indices allows saving one memcpy that accounts for 1% of the
runtime, according to oprofile.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

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

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

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

Also add error check on buffer allocation.

* qatar/master:
  configure: fix indentation in option parsing loop

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

Allow to parse durations >= 24:00:00.

Fixes null pointer dereference

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

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