vc1dec: Add support for interlaced B-frames

Signed-off-by: Martin Storsjö <martin@martin.st>
movenc: Don't add base_data_offset in tfhd for PIFF files

According to the PIFF specification[1] the base_data_offset field MUST be
omitteed. See section 5.2.17. Since the ISMV files created by libavformat
state that they are 'piff' compatible via 'ftyp' box, this needs to be
corrected.

[1] http://www.iis.net/learn/media/smooth-streaming/protected-interoperable-file-format

Signed-off-by: Martin Storsjö <martin@martin.st>
Apple Intermediate Codec decoder
vf_lut: make config_props work properly when called multiple times.

Do not leak the expressions.
vf_gradfun: make config_props work properly when called multiple times.
vf_frei0r: make config_props work properly when called multiple times.

Do not leak the initialized filter instance.
vf_fps: move initializing pts from config_props to init.

It should not be reinitialized if the link properties change.
vf_drawtext: do not reset the frame number in config_input.

Frame number should be incremented normally even if the link properties
change.
vf_drawbox: make config_props work properly when called multiple times.

Do not overwrite the variables set through AVOptions.
vf_setdar: make config_props work properly when called multiple times.

Do not overwrite the variable set through AVOptions.
vf_crop: make config_props work properly when called multiple times.

Do not leak the x/y expressions.
vf_drawtext: don't leak the expressions.
vf_hqdn3d: make config_props work properly when called multiple times.

Do not leak all the temp buffers.
vf_pixdesctest: make config_props work properly when called multiple times.
lavc/pthread: remove obsolete checks

Those were useful when avcodec_thread_init() was a public functions. It
was deprecated and removed some time ago, so those checks are not needed
anymore.
pthread: reindent
mpegvideo: allocate sufficiently large scratch buffer for interlaced vid

MPV_decode_mb_internal needs 3 * 16 * linesize bytes of scratch buffer

For interlaced content, linesize is multiplied by two after the allocation
of the scratch buffer, and the dest_cr pointer ends past the buffer.

This patch makes ff_mpv_frame_size_alloc allocate a total of
(aligned line_size) * 2 * 16 * 3 bytes, which suffices even for the
interlaced case.

CC:libav-stable@libav.org

Signed-off-by: Jindrich Makovicka <makovick@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
Merge commit '1fb013a57c6d98d3f425506eb25f32b2cf7ddc6f'

* commit '1fb013a57c6d98d3f425506eb25f32b2cf7ddc6f':
  vc1dec: Add support for interlaced B-frames

Conflicts:
	libavcodec/vc1dec.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '1232a1647ab27e024a3baf4d01d40c8d08d6ced9'

* commit '1232a1647ab27e024a3baf4d01d40c8d08d6ced9':
  Apple Intermediate Codec decoder
  movenc: Don't add base_data_offset in tfhd for PIFF files

Conflicts:
	Changelog
	libavcodec/allcodecs.c
	libavcodec/avcodec.h
	libavcodec/codec_desc.c
	libavcodec/version.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'd371c3c2e2830d9783465ecfe1ab7d93351083b7'

* commit 'd371c3c2e2830d9783465ecfe1ab7d93351083b7':
  vf_frei0r: make config_props work properly when called multiple times.
  vf_gradfun: make config_props work properly when called multiple times.
  vf_lut: make config_props work properly when called multiple times.

Conflicts:
	libavfilter/vf_lut.c

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