AVFilterLink.frame_count is supposed to count the number of frames
that were passed on the link, but with min_samples, that number is
not always the same for the source and destination filters.
With the addition of a FIFO on the link, the difference will become
more significant.

Split the variable in two: frame_count_in counts the number of
frames that entered the link, frame_count_out counts the number
of frames that were sent to the destination filter.

CC: libav-stable@libav.org

Libav, for some reason, merged this as a public API function. This will
aid in future merges.

A define is left for backwards compat, just in case some person
used it, since it is in a public header.
Signed-off-by: NDerek Buitenhuis <derek.buitenhuis@gmail.com>

Fixes Ticket4321
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

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

Fixes Ticket #1822.

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

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

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

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

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

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

This more evenly distributes the load between threads

This also fixes the chroma filtering where the filter was applied twice
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

This is shorter and consistent across filters.

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

This should fix several issues with odd dimensions inputs.

lut, vflip, pad and crop video filters also need to be checked for such
issues. It's possible sws is also affected.

Conflicts:

	libavfilter/avfilter.c
	libavfilter/vf_drawtext.c
	libavfilter/vf_lut.c
	libavfilter/vf_select.c
	libavfilter/vf_setpts.c
	libavfilter/vsrc_color.c
	libavfilter/vsrc_movie.c
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Deprecate AVFilterBuffer/AVFilterBufferRef and everything related to it
and use AVFrame instead.

Remove alpha_pix_fmts[].
Signed-off-by: NPaul B Mahol <onemda@gmail.com>

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

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

Any alleged performance benefits gained from the split are purely
mythological and do not justify added code complexity.

Fixes: CID718989
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

A number of compilers, for example those from TI and IBM, choke on
these initialisers.  The current style is also quite ugly.
Signed-off-by: NMans Rullgard <mans@mansr.com>