avfilter: add bilateral filter

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

Changelog

@@ -16,6 +16,7 @@ version <next>:
 - photosensitivity filter
 - anlms filter
 - arnndn filter
+- bilateral filter
 
 
 version 4.2:

doc/filters.texi

@@ -6336,6 +6336,23 @@ The filter accepts the following option:
 Set the minimal luminance value. Default is @code{16}.
 @end table
 
+@section bilateral
+Apply bilateral filter, spatial smoothing while preserving edges.
+
+The filter accepts the following options:
+@table @option
+@item sigmaS
+Set sigma of gaussian function to calculate spatial weight.
+Allowed range is 0 to 10. Default is 0.1.
+
+@item sigmaR
+Set sigma of gaussian function to calculate range weight.
+Allowed range is 0 to 1. Default is 0.1.
+
+@item planes
+Set planes to filter. Default is first only.
+@end table
+
 @section bitplanenoise
 
 Show and measure bit plane noise.

libavfilter/Makefile

@@ -164,6 +164,7 @@ OBJS-$(CONFIG_AVGBLUR_OPENCL_FILTER)         += vf_avgblur_opencl.o opencl.o \
                                                 opencl/avgblur.o boxblur.o
 OBJS-$(CONFIG_BBOX_FILTER)                   += bbox.o vf_bbox.o
 OBJS-$(CONFIG_BENCH_FILTER)                  += f_bench.o
+OBJS-$(CONFIG_BILATERAL_FILTER)              += vf_bilateral.o
 OBJS-$(CONFIG_BITPLANENOISE_FILTER)          += vf_bitplanenoise.o
 OBJS-$(CONFIG_BLACKDETECT_FILTER)            += vf_blackdetect.o
 OBJS-$(CONFIG_BLACKFRAME_FILTER)             += vf_blackframe.o

libavfilter/allfilters.c

@@ -155,6 +155,7 @@ extern AVFilter ff_vf_avgblur;
 extern AVFilter ff_vf_avgblur_opencl;
 extern AVFilter ff_vf_bbox;
 extern AVFilter ff_vf_bench;
+extern AVFilter ff_vf_bilateral;
 extern AVFilter ff_vf_bitplanenoise;
 extern AVFilter ff_vf_blackdetect;
 extern AVFilter ff_vf_blackframe;

libavfilter/version.h

@@ -30,7 +30,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVFILTER_VERSION_MAJOR   7
-#define LIBAVFILTER_VERSION_MINOR  63
+#define LIBAVFILTER_VERSION_MINOR  64
 #define LIBAVFILTER_VERSION_MICRO 100