avfilter: add pixelize video filter

Changelog

@@ -10,6 +10,7 @@ version 5.1:
 - Vizrt Binary Image encoder/decoder
 - avsynctest source filter
 - feedback video filter
+- pixelize video filter
 
 
 version 5.0:

doc/filters.texi

@@ -17863,6 +17863,35 @@ format=monow, pixdesctest
 
 can be used to test the monowhite pixel format descriptor definition.
 
+@section pixelize
+Apply pixelization to video stream.
+
+The filter accepts the following options:
+@table @option
+@item width, w
+@item height, h
+Set block dimensions that will be used for pixelization.
+Default value is @code{16}.
+
+@item mode, m
+Set the mode of pixelization used.
+
+Possible values are:
+@table @samp
+@item avg
+@item min
+@item max
+@end table
+Default value is @code{avg}.
+
+@item planes, p
+Set what planes to filter. Default is to filter all planes.
+@end table
+
+@subsection Commands
+
+This filter supports all options as @ref{commands}.
+
 @section pixscope
 
 Display sample values of color channels. Mainly useful for checking color

libavfilter/Makefile

@@ -391,6 +391,7 @@ OBJS-$(CONFIG_PERSPECTIVE_FILTER)            += vf_perspective.o
 OBJS-$(CONFIG_PHASE_FILTER)                  += vf_phase.o
 OBJS-$(CONFIG_PHOTOSENSITIVITY_FILTER)       += vf_photosensitivity.o
 OBJS-$(CONFIG_PIXDESCTEST_FILTER)            += vf_pixdesctest.o
+OBJS-$(CONFIG_PIXELIZE_FILTER)               += vf_pixelize.o
 OBJS-$(CONFIG_PIXSCOPE_FILTER)               += vf_datascope.o
 OBJS-$(CONFIG_PP_FILTER)                     += vf_pp.o qp_table.o
 OBJS-$(CONFIG_PP7_FILTER)                    += vf_pp7.o qp_table.o

libavfilter/allfilters.c

@@ -373,6 +373,7 @@ extern const AVFilter ff_vf_perspective;
 extern const AVFilter ff_vf_phase;
 extern const AVFilter ff_vf_photosensitivity;
 extern const AVFilter ff_vf_pixdesctest;
+extern const AVFilter ff_vf_pixelize;
 extern const AVFilter ff_vf_pixscope;
 extern const AVFilter ff_vf_pp;
 extern const AVFilter ff_vf_pp7;

libavfilter/version.h

@@ -31,7 +31,7 @@
 
 #include "version_major.h"
 
-#define LIBAVFILTER_VERSION_MINOR  32
+#define LIBAVFILTER_VERSION_MINOR  33
 #define LIBAVFILTER_VERSION_MICRO 100