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

Adds allpass, bass, bandpass, bandreject, biquad,
equalizer, highpass, lowpass and treble filter.

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

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

This is a port of virtual dub's histogram equalization filter by Donald
A. Graft. Based on the work by Jérémy Tran <tran.jeremy.av@gmail.com>,
done for SOCIS 2012.

This is a port of the kerndeint filter (libmpcodecs/vf_kerndeint) by
Donal A. Graft (original avisynth plugin author), and is based on the
work by Jérémy Tran <tran.jeremy.av@gmail.com> done for SOCIS 2012.

Also rename the "enable_auto" field to "deint", to match the name of the
option.

Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

Native pp filter is available.

postproc dependency is also dropped from mp wrapper since it was the
only filter needing that dependency.

Ported from MPlayer. Original author is A'rpi, with various
contributions from Michael Niedermayer. The original documentation was
mostly written by Diego Biurrun. See the MPlayer history for full
credits.

The filter is under GPL like the original filter, even if it differs
quite a lot. There is not much point in making it LGPL since pp is under
GPL.

Simplify.

This breaks usage for out-of-range values.

This will prevent an overflow in the SSSE3 and MMX filter_line code:
delta is expressed as an u16 being shifted by 2 to the left. If it
overflows, having a strength not above 64 will make sure that m is set
to 0 (making the m*m*delta >> 14 expression void).

A value above 64 should not make any sense unless gradfun is used as a
blur filter.

This filter pads an audio stream with silence
It can together with -shortest be used to extend audio streams to
the same length as video.

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

Also fix documentation accordingly.

Add options introspection, and improve error feedback.

hqdn3d was meant to be a more efficient denoise3d filter, is supported
natively, and is faster on my computer thanks to the ASM optimisations.

Justin's version has more features but is otherwise equivalent from the
point of view of the syntax.

Simplify code, and provide introspection through the AVOption system.

Based on the volume filter in FFmpeg written by Stefano Sabatini
<stefasab@gmail.com>.

Same calculation as for RGBA etc to create unpremultiplied output.
Useful for creating an intermediate "Mix/Effects bank", in vision mixer
(switcher) terminology.

Example command:

ffmpeg -i input.mov -vf
"[in]scale=iw:ih:interl=1,format=yuv420p[bg];movie=BBC_blocks_watermark.png,scale=iw:ih:interl=1,format=yuva420p[dog];movie=Kickabout_strap.mov,scale=iw:ih:interl=1,format=yuva420p[strap];[strap][dog]overlay=0:0[me1];[bg][me1]overlay=0:0,scale=0:0:interl=1[out]"
-b:v 3M -an output.mov

Fix trac ticket #549.

Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

Fix trac ticket #1949.

The new expansion mechanism uses the %{...} notation.
For compatibility reasons, it must be enabled explicitly,
but a warning is printed if a conflict is likely to happen.

The channels field is required since the channel layout is not always
available.

Native geq video filter is now available.

lavfi/f_setpts.c should allow everything mp=fixpts supports, with a lot
of additional control.

The native tile video filter is now feature equivalent.

The native filter was ported from the MPlayer project when the mp
wrapper didn't even exist, and when mp=hqdn3d was added, it was already
obsolete.

All the rectangle features have been ported to the native drawbox filter,
which has an equivalent syntax.

Based on a libmpcodecs/vf_rectangle.c feature.

The filter has been ported to a native libavfilter filter.

The filter is a port of libmpcodecs/vf_field.c, since there is no common
code I relicensed it as LGPL, while keeping the original author
copyright.

Same functionality is provided by libswscale.

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