Simplify code, and provide introspection through the AVOption system.

Also add missing NULL checks.

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

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

Protects against overreads in input buffer.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

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

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

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

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

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

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

* qatar/master:
  h264: slice-mt: check master context for valid current_picture_ptr
  h264: slice-mt: get last_pic_dropable from master context
  alacenc: add support for multi-channel encoding

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

* commit 'b519298a':
  pixdesc: fix yuva 10bit bit depth
  avconv: deprecate the -vol option
  x86: af_volume: add SSE2/SSSE3/AVX-optimized s32 volume scaling
  x86: af_volume: add SSE2-optimized s16 volume scaling

Conflicts:
	ffmpeg.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>

This matches the naming style of the new af_volume_justin filter.

Note, Yes i would too prefer having one filter instead of 2.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'b384e031':
  lavfi: add volume filter

Conflicts:
	Changelog
	libavfilter/Makefile
	libavfilter/af_volume.c
	libavfilter/version.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

float.h is a system header.

Also update FATE test to use the dB form.

* commit '9d5c62ba':
  lavu/opt: do not filter out the initial sign character except for flags
  eval: treat dB as decibels instead of decibytes
  float_dsp: add vector_dmul_scalar() to multiply a vector of doubles

Conflicts:
	libavutil/eval.c
	tests/ref/fate/eval
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Fix warning.

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

Fixes errors in slice based multithreading introduced in 0b300daa.

Fixes fate-h264-conformance-cvnlfi2_sony_h and smllwebdl.mkv from
https://github.com/OpenELEC/OpenELEC.tv/issues/1557 .

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

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

This reverts commit 7feef7db.

This commit causes assertion failures due to use of parser_init from multiple
threads, for example indirectly by ffmpeg.c and more directly from the
packet read functions.

I dont know how to fix this quickly, and fixing ffmpeg.c leaves
the possibility of other applications being affected.
Crashing the applications until this is resolved is clearly no good
thus this revert, so we have time to think about the problem.

Crashes can be reproduced by using multiple input files in ffmpeg.

This reverts commit dd154198.

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

Fixes assertion failure

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