Merge commit '7ed833d78ea661d619124fd898547a900f6480bc'

* commit '7ed833d78ea661d619124fd898547a900f6480bc':
  vf_gradfun: switch to an AVOptions-based system.

Conflicts:
	doc/filters.texi
	libavfilter/gradfun.h
	libavfilter/vf_gradfun.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

doc/filters.texi

@@ -3412,22 +3412,21 @@ This filter is designed for playback only.  Do not use it prior to
 lossy compression, because compression tends to lose the dither and
 bring back the bands.
 
-The filter accepts a list of options in the form of @var{key}=@var{value} pairs
+This filter accepts the following options:
-separated by ":". A description of the accepted options follows.
 
 @table @option
 
 @item strength
-The maximum amount by which the filter will change
+The maximum amount by which the filter will change any one pixel. Also the
-any one pixel. Also the threshold for detecting nearly flat
+threshold for detecting nearly flat regions. Acceptable values range from .51 to
-regions. Acceptable values range from @code{0.51} to @code{64}, default value
+64, default value is 1.2, out-of-range values will be clipped to the valid
-is @code{1.2}.
+range.
 
 @item radius
-The neighborhood to fit the gradient to. A larger
+The neighborhood to fit the gradient to. A larger radius makes for smoother
-radius makes for smoother gradients, but also prevents the filter from
+gradients, but also prevents the filter from modifying the pixels near detailed
-modifying the pixels near detailed regions. Acceptable values are
+regions. Acceptable values are 8-32, default value is 16, out-of-range values
-@code{8-32}, default value is @code{16}.
+will be clipped to the valid range.
 
 @end table
 

libavfilter/avfilter.c

@@ -669,6 +669,7 @@ int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque
         !strcmp(filter->filter->name,  "fps"       ) ||
         !strcmp(filter->filter->name,  "frei0r"    ) ||
         !strcmp(filter->filter->name,  "frei0r_src") ||
+        !strcmp(filter->filter->name, "gradfun"    ) ||
         !strcmp(filter->filter->name,   "format") ||
         !strcmp(filter->filter->name, "noformat") ||
         !strcmp(filter->filter->name, "resample") ||

libavfilter/gradfun.h

@@ -27,7 +27,7 @@
 /// Holds instance-specific information for gradfun.
 typedef struct GradFunContext {
     const AVClass *class;
-    double strength;    ///< user specified strength, used to define thresh
+    float strength;
     int thresh;    ///< threshold for gradient algorithm
     int radius;    ///< blur radius
     int chroma_w;  ///< width of the chroma planes

libavfilter/vf_gradfun.c

@@ -35,6 +35,7 @@
 #include "libavutil/imgutils.h"
 #include "libavutil/common.h"
 #include "libavutil/cpu.h"
+#include "libavutil/opt.h"
 #include "libavutil/pixdesc.h"
 #include "libavutil/opt.h"
 #include "avfilter.h"
@@ -43,17 +44,6 @@
 #include "internal.h"
 #include "video.h"
 
-#define OFFSET(x) offsetof(GradFunContext, x)
-#define F AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
-
-static const AVOption gradfun_options[] = {
-    { "strength", "set the maximum amount by which the filter will change any one pixel", OFFSET(strength), AV_OPT_TYPE_DOUBLE, {.dbl = 1.2}, 0.51, 64, F },
-    { "radius",   "set the neighborhood to fit the gradient to",                          OFFSET(radius),   AV_OPT_TYPE_INT,    {.i64 =  16},    4, 32, F },
-    { NULL }
-};
-
-AVFILTER_DEFINE_CLASS(gradfun);
-
 DECLARE_ALIGNED(16, static const uint16_t, dither)[8][8] = {
     {0x00,0x60,0x18,0x78,0x06,0x66,0x1E,0x7E},
     {0x40,0x20,0x58,0x38,0x46,0x26,0x5E,0x3E},
@@ -135,8 +125,8 @@ static av_cold int init(AVFilterContext *ctx, const char *args)
 {
     GradFunContext *gf = ctx->priv;
 
-    gf->thresh = (1 << 15) / gf->strength;
+    gf->thresh  = (1 << 15) / gf->strength;
-    gf->radius = av_clip((gf->radius + 1) & ~1, 4, 32);
+    gf->radius  = av_clip((gf->radius + 1) & ~1, 4, 32);
 
     gf->blur_line   = ff_gradfun_blur_line_c;
     gf->filter_line = ff_gradfun_filter_line_c;
@@ -231,6 +221,17 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
     return ff_filter_frame(outlink, out);
 }
 
+#define OFFSET(x) offsetof(GradFunContext, x)
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
+
+static const AVOption gradfun_options[] = {
+    { "strength", "The maximum amount by which the filter will change any one pixel.", OFFSET(strength), AV_OPT_TYPE_FLOAT, { .dbl = 1.2 }, 0.51, 64, FLAGS },
+    { "radius",   "The neighborhood to fit the gradient to.",                          OFFSET(radius),   AV_OPT_TYPE_INT,   { .i64 = 16  }, 4,    32, FLAGS },
+    { NULL },
+};
+
+AVFILTER_DEFINE_CLASS(gradfun);
+
 static const AVFilterPad avfilter_vf_gradfun_inputs[] = {
     {
         .name         = "default",
@@ -249,17 +250,14 @@ static const AVFilterPad avfilter_vf_gradfun_outputs[] = {
     { NULL }
 };
 
-static const char *const shorthand[] = { "strength", "radius", NULL };
-
 AVFilter avfilter_vf_gradfun = {
     .name          = "gradfun",
     .description   = NULL_IF_CONFIG_SMALL("Debands video quickly using gradients."),
     .priv_size     = sizeof(GradFunContext),
+    .priv_class    = &gradfun_class,
     .init          = init,
     .uninit        = uninit,
     .query_formats = query_formats,
     .inputs        = avfilter_vf_gradfun_inputs,
     .outputs       = avfilter_vf_gradfun_outputs,
-    .priv_class    = &gradfun_class,
-    .shorthand     = shorthand,
 };