avfilter: add vaguedenoiser filter

Changelog

@@ -22,6 +22,7 @@ version <next>:
 - hysteresis filter
 - lut2 filter
 - yuvtestsrc filter
+- vaguedenoiser filter
 
 
 version 3.1:

configure

@@ -3075,6 +3075,7 @@ tinterlace_filter_deps="gpl"
 tinterlace_merge_test_deps="tinterlace_filter"
 tinterlace_pad_test_deps="tinterlace_filter"
 uspp_filter_deps="gpl avcodec"
+vaguedenoiser_filter_deps="gpl"
 vidstabdetect_filter_deps="libvidstab"
 vidstabtransform_filter_deps="libvidstab"
 zmq_filter_deps="libzmq"

doc/filters.texi

@@ -13379,6 +13379,53 @@ Force a constant quantization parameter. If not set, the filter will use the QP
 from the video stream (if available).
 @end table
 
+@section vaguedenoiser
+
+Apply a wavelet based denoiser.
+
+It transforms each frame from the video input into the wavelet domain,
+using Cohen-Daubechies-Feauveau 9/7. Then it applies some filtering to
+the obtained coefficients. It does an inverse wavelet transform after.
+Due to wavelet properties, it should give a nice smoothed result, and
+reduced noise, without blurring picture features.
+
+This filter accepts the following options:
+
+@table @option
+@item threshold
+The filtering strength. The higher, the more filtered the video will be.
+Hard thresholding can use a higher threshold than soft thresholding
+before the video looks overfiltered.
+
+@item method
+The filtering method the filter will use.
+
+It accepts the following values:
+@table @samp
+@item hard
+All values under the threshold will be zeroed.
+
+@item soft
+All values under the threshold will be zeroed. All values above will be
+reduced by the threshold.
+
+@item garrote
+Scales or nullifies coefficients - intermediary between (more) soft and
+(less) hard thresholding.
+@end table
+
+@item nsteps
+Number of times, the wavelet will decompose the picture. Picture can't
+be decomposed beyond a particular point (typically, 8 for a 640x480
+frame - as 2^9 = 512 > 480)
+
+@item percent
+Partial of full denoising (limited coefficients shrinking), from 0 to 100.
+
+@item planes
+A list of the planes to process. By default all planes are processed.
+@end table
+
 @section vectorscope
 
 Display 2 color component values in the two dimensional graph (which is called

libavfilter/Makefile

@@ -286,6 +286,7 @@ OBJS-$(CONFIG_TRANSPOSE_FILTER)              += vf_transpose.o
 OBJS-$(CONFIG_TRIM_FILTER)                   += trim.o
 OBJS-$(CONFIG_UNSHARP_FILTER)                += vf_unsharp.o
 OBJS-$(CONFIG_USPP_FILTER)                   += vf_uspp.o
+OBJS-$(CONFIG_VAGUEDENOISER_FILTER)          += vf_vaguedenoiser.o
 OBJS-$(CONFIG_VECTORSCOPE_FILTER)            += vf_vectorscope.o
 OBJS-$(CONFIG_VFLIP_FILTER)                  += vf_vflip.o
 OBJS-$(CONFIG_VIDSTABDETECT_FILTER)          += vidstabutils.o vf_vidstabdetect.o

libavfilter/allfilters.c

@@ -302,6 +302,7 @@ void avfilter_register_all(void)
     REGISTER_FILTER(TRIM,           trim,           vf);
     REGISTER_FILTER(UNSHARP,        unsharp,        vf);
     REGISTER_FILTER(USPP,           uspp,           vf);
+    REGISTER_FILTER(VAGUEDENOISER,  vaguedenoiser,  vf);
     REGISTER_FILTER(VECTORSCOPE,    vectorscope,    vf);
     REGISTER_FILTER(VFLIP,          vflip,          vf);
     REGISTER_FILTER(VIDSTABDETECT,  vidstabdetect,  vf);

libavfilter/version.h

@@ -30,7 +30,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVFILTER_VERSION_MAJOR   6
-#define LIBAVFILTER_VERSION_MINOR  56
+#define LIBAVFILTER_VERSION_MINOR  57
 #define LIBAVFILTER_VERSION_MICRO 100
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \