avfilter/vf_yaepblur: add yaepblur filter

Signed-off-by: leozhang <leozhang@qiyi.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

doc/filters.texi

@@ -19918,6 +19918,28 @@ Only deinterlace frames marked as interlaced.
 The default value is @code{all}.
 @end table
 
+@section yaepblur
+
+Apply blur filter while preserving edges ("yaepblur" means "yet another edge preserving blur filter").
+The algorithm is described in
+"J. S. Lee, Digital image enhancement and noise filtering by use of local statistics, IEEE Trans. Pattern Anal. Mach. Intell. PAMI-2, 1980."
+
+It accepts the following parameters:
+
+@table @option
+@item radius, r
+Set the window radius. Default value is 3.
+
+@item planes, p
+Set which planes to filter. Default is only the first plane.
+
+@item sigma, s
+Set blur strength. Default value is 128.
+@end table
+
+@subsection Commands
+This filter supports same @ref{commands} as options.
+
 @section zoompan
 
 Apply Zoom & Pan effect.

libavfilter/Makefile

@@ -443,6 +443,7 @@ OBJS-$(CONFIG_XSTACK_FILTER)                 += vf_stack.o framesync.o
 OBJS-$(CONFIG_YADIF_FILTER)                  += vf_yadif.o yadif_common.o
 OBJS-$(CONFIG_YADIF_CUDA_FILTER)             += vf_yadif_cuda.o vf_yadif_cuda.ptx.o \
                                                 yadif_common.o
+OBJS-$(CONFIG_YAEPBLUR_FILTER)               += vf_yaepblur.o
 OBJS-$(CONFIG_ZMQ_FILTER)                    += f_zmq.o
 OBJS-$(CONFIG_ZOOMPAN_FILTER)                += vf_zoompan.o
 OBJS-$(CONFIG_ZSCALE_FILTER)                 += vf_zscale.o

libavfilter/allfilters.c

@@ -421,6 +421,7 @@ extern AVFilter ff_vf_xmedian;
 extern AVFilter ff_vf_xstack;
 extern AVFilter ff_vf_yadif;
 extern AVFilter ff_vf_yadif_cuda;
+extern AVFilter ff_vf_yaepblur;
 extern AVFilter ff_vf_zmq;
 extern AVFilter ff_vf_zoompan;
 extern AVFilter ff_vf_zscale;

libavfilter/version.h

@@ -30,7 +30,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVFILTER_VERSION_MAJOR   7
-#define LIBAVFILTER_VERSION_MINOR  67
+#define LIBAVFILTER_VERSION_MINOR  68
 #define LIBAVFILTER_VERSION_MICRO 100