lavfi: port mcdeint filter from libmpcodecs

LICENSE

@@ -35,6 +35,7 @@ Specifically, the GPL parts of FFmpeg are
     - vf_hqdn3d.c
     - vf_hue.c
     - vf_kerndeint.c
+    - vf_mcdeint.c
     - vf_mp.c
     - vf_noise.c
     - vf_owdenoise.c

configure

@@ -2154,6 +2154,7 @@ hqdn3d_filter_deps="gpl"
 hue_filter_deps="gpl"
 interlace_filter_deps="gpl"
 kerndeint_filter_deps="gpl"
+mcdeint_filter_deps="avcodec gpl"
 movie_filter_deps="avcodec avformat"
 mp_filter_deps="gpl avcodec swscale inline_asm"
 mpdecimate_filter_deps="gpl avcodec"

doc/filters.texi

@@ -4855,6 +4855,50 @@ lutyuv=y='bitand(val, 128+64+32)'
 @end example
 @end itemize
 
+@section mcdeint
+
+Apply motion-compensation deinterlacing.
+
+It needs one field per frame as input and must thus be used together
+with yadif=1/3 or equivalent.
+
+This filter accepts the following options:
+@table @option
+@item mode
+Set the deinterlacing mode.
+
+It accepts one of the following values:
+@table @samp
+@item fast
+@item medium
+@item slow
+use iterative motion estimation
+@item extra_slow
+like @samp{slow}, but use multiple reference frames.
+@end table
+Default value is @samp{fast}.
+
+@item parity
+Set the picture field parity assumed for the input video. It must be
+one of the following values:
+
+@table @samp
+@item 0, tff
+assume top field first
+@item 1, bff
+assume bottom field first
+@end table
+
+Default value is @samp{bff}.
+
+@item qp
+Set per-block quantization parameter (QP) used by the internal
+encoder.
+
+Higher values should result in a smoother motion vector field but less
+optimal individual vectors. Default value is 1.
+@end table
+
 @section mp
 
 Apply an MPlayer filter to the input video.

libavfilter/Makefile

@@ -9,6 +9,7 @@ FFLIBS-$(CONFIG_ASYNCTS_FILTER)              += avresample
 FFLIBS-$(CONFIG_ATEMPO_FILTER)               += avcodec
 FFLIBS-$(CONFIG_DECIMATE_FILTER)             += avcodec
 FFLIBS-$(CONFIG_DESHAKE_FILTER)              += avcodec
+FFLIBS-$(CONFIG_MCDEINT_FILTER)              += avcodec
 FFLIBS-$(CONFIG_MOVIE_FILTER)                += avformat avcodec
 FFLIBS-$(CONFIG_MP_FILTER)                   += avcodec
 FFLIBS-$(CONFIG_PAN_FILTER)                  += swresample
@@ -150,6 +151,7 @@ OBJS-$(CONFIG_LUT3D_FILTER)                  += vf_lut3d.o
 OBJS-$(CONFIG_LUT_FILTER)                    += vf_lut.o
 OBJS-$(CONFIG_LUTRGB_FILTER)                 += vf_lut.o
 OBJS-$(CONFIG_LUTYUV_FILTER)                 += vf_lut.o
+OBJS-$(CONFIG_MCDEINT_FILTER)                += vf_mcdeint.o
 OBJS-$(CONFIG_MP_FILTER)                     += vf_mp.o
 OBJS-$(CONFIG_MPDECIMATE_FILTER)             += vf_mpdecimate.o
 OBJS-$(CONFIG_NEGATE_FILTER)                 += vf_lut.o

libavfilter/allfilters.c

@@ -148,6 +148,7 @@ void avfilter_register_all(void)
     REGISTER_FILTER(LUT,            lut,            vf);
     REGISTER_FILTER(LUTRGB,         lutrgb,         vf);
     REGISTER_FILTER(LUTYUV,         lutyuv,         vf);
+    REGISTER_FILTER(MCDEINT,        mcdeint,        vf);
     REGISTER_FILTER(MP,             mp,             vf);
     REGISTER_FILTER(MPDECIMATE,     mpdecimate,     vf);
     REGISTER_FILTER(NEGATE,         negate,         vf);

libavfilter/version.h

@@ -30,7 +30,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFILTER_VERSION_MAJOR  3
-#define LIBAVFILTER_VERSION_MINOR  73
+#define LIBAVFILTER_VERSION_MINOR  74
 #define LIBAVFILTER_VERSION_MICRO 100
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \