lavfi: port wavelet denoiser filter from libmpcodecs.

Changelog

@@ -47,6 +47,7 @@ version <next>:
 - ADPCM IMA Radical decoder
 - zmq filters
 - DCT denoiser filter (dctdnoiz)
+- Wavelet denoiser filter ported from libmpcodecs as owdenoise (formerly "ow")
 
 
 version 1.2:

LICENSE

@@ -37,6 +37,7 @@ Specifically, the GPL parts of FFmpeg are
     - vf_kerndeint.c
     - vf_mp.c
     - vf_noise.c
+    - vf_owdenoise.c
     - vf_pp.c
     - vf_smartblur.c
     - vf_stereo3d.c

configure

@@ -2154,6 +2154,7 @@ negate_filter_deps="lut_filter"
 noise_filter_deps="gpl"
 resample_filter_deps="avresample"
 ocv_filter_deps="libopencv"
+owdenoise_filter_deps="gpl"
 pan_filter_deps="swresample"
 pp_filter_deps="gpl postproc"
 removelogo_filter_deps="avcodec avformat swscale"

doc/filters.texi

@@ -5214,6 +5214,32 @@ testsrc=s=100x100, split=4 [in0][in1][in2][in3];
 
 @end itemize
 
+@section owdenoise
+
+Overcomplete Wavelet denoiser.
+
+The filter accepts the following options:
+
+@table @option
+@item depth
+Set depth.
+
+Larger depth values will denoise lower frequency components more, but
+slow down filtering.
+
+Default is @code{8}.
+
+@item luma_strength
+Set luma strength.
+
+Default is @code{1.0}
+
+@item chroma_strength
+Set chroma strength.
+
+Default is @code{1.0}
+@end table
+
 @section pad
 
 Add paddings to the input image, and place the original input at the

libavfilter/Makefile

@@ -157,6 +157,7 @@ OBJS-$(CONFIG_NULL_FILTER)                   += vf_null.o
 OBJS-$(CONFIG_OCV_FILTER)                    += vf_libopencv.o
 OBJS-$(CONFIG_OPENCL)                        += deshake_opencl.o unsharp_opencl.o
 OBJS-$(CONFIG_OVERLAY_FILTER)                += vf_overlay.o
+OBJS-$(CONFIG_OWDENOISE_FILTER)              += vf_owdenoise.o
 OBJS-$(CONFIG_PAD_FILTER)                    += vf_pad.o
 OBJS-$(CONFIG_PERMS_FILTER)                  += f_perms.o
 OBJS-$(CONFIG_PIXDESCTEST_FILTER)            += vf_pixdesctest.o

libavfilter/allfilters.c

@@ -154,6 +154,7 @@ void avfilter_register_all(void)
     REGISTER_FILTER(NULL,           null,           vf);
     REGISTER_FILTER(OCV,            ocv,            vf);
     REGISTER_FILTER(OVERLAY,        overlay,        vf);
+    REGISTER_FILTER(OWDENOISE,      owdenoise,      vf);
     REGISTER_FILTER(PAD,            pad,            vf);
     REGISTER_FILTER(PERMS,          perms,          vf);
     REGISTER_FILTER(PIXDESCTEST,    pixdesctest,    vf);

libavfilter/version.h

@@ -29,7 +29,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFILTER_VERSION_MAJOR  3
-#define LIBAVFILTER_VERSION_MINOR  67
+#define LIBAVFILTER_VERSION_MINOR  68
 #define LIBAVFILTER_VERSION_MICRO 100
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \