avfilter: add estdif video filter

Author: richardpl

Changelog

@@ -55,6 +55,7 @@ version <next>:
 - asuperpass and asuperstop filter
 - shufflepixels filter
 - tmidequalizer filter
+- estdif filter
 
 
 version 4.3:

doc/filters.texi

@@ -11065,6 +11065,70 @@ Flags to local 3x3 coordinates maps like this:
 
 This filter supports the all above options as @ref{commands}.
 
+@section estdif
+
+Deinterlace the input video ("estdif" stands for "Edge Slope
+Tracing Deinterlacing Filter").
+
+Spatial only filter that uses edge slope tracing algorithm
+to interpolate missing lines.
+It accepts the following parameters:
+
+@table @option
+@item mode
+The interlacing mode to adopt. It accepts one of the following values:
+
+@table @option
+@item frame
+Output one frame for each frame.
+@item field
+Output one frame for each field.
+@end table
+
+The default value is @code{field}.
+
+@item parity
+The picture field parity assumed for the input interlaced video. It accepts one
+of the following values:
+
+@table @option
+@item tff
+Assume the top field is first.
+@item bff
+Assume the bottom field is first.
+@item auto
+Enable automatic detection of field parity.
+@end table
+
+The default value is @code{auto}.
+If the interlacing is unknown or the decoder does not export this information,
+top field first will be assumed.
+
+@item deint
+Specify which frames to deinterlace. Accepts one of the following
+values:
+
+@table @option
+@item all
+Deinterlace all frames.
+@item interlaced
+Only deinterlace frames marked as interlaced.
+@end table
+
+The default value is @code{all}.
+
+@item rslope
+Specify the search radius for edge slope tracing. Default value is 1.
+Allowed range is from 1 to 15.
+
+@item redge
+Specify the search radius for best edge matching. Default value is 2.
+Allowed range is from 0 to 15.
+@end table
+
+@subsection Commands
+This filter supports same @ref{commands} as options.
+
 @section extractplanes
 
 Extract color channel components from input video stream into

libavfilter/Makefile

@@ -252,6 +252,7 @@ OBJS-$(CONFIG_EQ_FILTER)                     += vf_eq.o
 OBJS-$(CONFIG_EROSION_FILTER)                += vf_neighbor.o
 OBJS-$(CONFIG_EROSION_OPENCL_FILTER)         += vf_neighbor_opencl.o opencl.o \
                                                 opencl/neighbor.o
+OBJS-$(CONFIG_ESTDIF_FILTER)                 += vf_estdif.o
 OBJS-$(CONFIG_EXTRACTPLANES_FILTER)          += vf_extractplanes.o
 OBJS-$(CONFIG_FADE_FILTER)                   += vf_fade.o
 OBJS-$(CONFIG_FFTDNOIZ_FILTER)               += vf_fftdnoiz.o

libavfilter/allfilters.c

@@ -237,6 +237,7 @@ extern AVFilter ff_vf_entropy;
 extern AVFilter ff_vf_eq;
 extern AVFilter ff_vf_erosion;
 extern AVFilter ff_vf_erosion_opencl;
+extern AVFilter ff_vf_estdif;
 extern AVFilter ff_vf_extractplanes;
 extern AVFilter ff_vf_fade;
 extern AVFilter ff_vf_fftdnoiz;

libavfilter/version.h

@@ -30,7 +30,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVFILTER_VERSION_MAJOR   7
-#define LIBAVFILTER_VERSION_MINOR  95
+#define LIBAVFILTER_VERSION_MINOR  96
 #define LIBAVFILTER_VERSION_MICRO 100