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vf_boxblur: switch to an AVOptions-based system.
This commit is contained in:
Anton Khirnov
parent
62dcdb028c
commit
51def31dbe
@ -550,8 +550,18 @@ Threshold below which a pixel value is considered black, defaults to 32.
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Apply boxblur algorithm to the input video.
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This filter accepts the parameters:
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@var{luma_power}:@var{luma_radius}:@var{chroma_radius}:@var{chroma_power}:@var{alpha_radius}:@var{alpha_power}
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This filter accepts the following options:
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@table @option
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@item luma_radius
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@item luma_power
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@item chroma_radius
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@item chroma_power
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@item alpha_radius
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@item alpha_power
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@end table
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Chroma and alpha parameters are optional, if not specified they default
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to the corresponding values set for @var{luma_radius} and
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@ -589,7 +599,7 @@ Some examples follow:
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Apply a boxblur filter with luma, chroma, and alpha radius
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set to 2:
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@example
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boxblur=2:1
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boxblur=luma_radius=2:luma_power=1
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@end example
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@item
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@ -601,7 +611,7 @@ boxblur=2:1:0:0:0:0
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@item
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Set luma and chroma radius to a fraction of the video dimension
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@example
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boxblur=min(h\,w)/10:1:min(cw\,ch)/10:1
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boxblur=luma_radius=min(h\,w)/10:luma_power=1:chroma_radius=min(cw\,ch)/10:chroma_power=1
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@end example
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@end itemize
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@ -28,6 +28,7 @@
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#include "libavutil/avstring.h"
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#include "libavutil/common.h"
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#include "libavutil/eval.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "formats.h"
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@ -60,12 +61,13 @@ typedef struct {
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} FilterParam;
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typedef struct {
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const AVClass *class;
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FilterParam luma_param;
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FilterParam chroma_param;
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FilterParam alpha_param;
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char luma_radius_expr [256];
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char chroma_radius_expr[256];
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char alpha_radius_expr [256];
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char *luma_radius_expr;
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char *chroma_radius_expr;
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char *alpha_radius_expr;
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int hsub, vsub;
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int radius[4];
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@ -81,34 +83,23 @@ typedef struct {
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static av_cold int init(AVFilterContext *ctx, const char *args)
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{
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BoxBlurContext *boxblur = ctx->priv;
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int e;
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if (!args) {
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av_log(ctx, AV_LOG_ERROR,
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"Filter expects 2 or 4 or 6 arguments, none provided\n");
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if (!boxblur->luma_radius_expr) {
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av_log(ctx, AV_LOG_ERROR, "Luma radius expression is not set.\n");
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return AVERROR(EINVAL);
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}
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e = sscanf(args, "%255[^:]:%d:%255[^:]:%d:%255[^:]:%d",
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boxblur->luma_radius_expr, &boxblur->luma_param .power,
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boxblur->chroma_radius_expr, &boxblur->chroma_param.power,
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boxblur->alpha_radius_expr, &boxblur->alpha_param .power);
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if (e != 2 && e != 4 && e != 6) {
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av_log(ctx, AV_LOG_ERROR,
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"Filter expects 2 or 4 or 6 params, provided %d\n", e);
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return AVERROR(EINVAL);
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}
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if (e < 4) {
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if (!boxblur->chroma_radius_expr) {
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boxblur->chroma_radius_expr = av_strdup(boxblur->luma_radius_expr);
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if (!boxblur->chroma_radius_expr)
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return AVERROR(ENOMEM);
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boxblur->chroma_param.power = boxblur->luma_param.power;
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av_strlcpy(boxblur->chroma_radius_expr, boxblur->luma_radius_expr,
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sizeof(boxblur->chroma_radius_expr));
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}
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if (e < 6) {
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if (!boxblur->alpha_radius_expr) {
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boxblur->alpha_radius_expr = av_strdup(boxblur->luma_radius_expr);
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if (!boxblur->alpha_radius_expr)
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return AVERROR(ENOMEM);
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boxblur->alpha_param.power = boxblur->luma_param.power;
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av_strlcpy(boxblur->alpha_radius_expr, boxblur->luma_radius_expr,
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sizeof(boxblur->alpha_radius_expr));
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}
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return 0;
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@ -342,6 +333,28 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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return ff_filter_frame(outlink, out);
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}
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#define OFFSET(x) offsetof(BoxBlurContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption options[] = {
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{ "luma_radius", "Radius of the luma blurring box", OFFSET(luma_radius_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
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{ "luma_power", "How many times should the boxblur be applied to luma",
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OFFSET(luma_param.power), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, FLAGS },
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{ "chroma_radius", "Radius of the chroma blurring box", OFFSET(chroma_radius_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
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{ "chroma_power", "How many times should the boxblur be applied to chroma",
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OFFSET(chroma_param.power), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, FLAGS },
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{ "alpha_radius", "Radius of the alpha blurring box", OFFSET(alpha_radius_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
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{ "alpha_power", "How many times should the boxblur be applied to alpha",
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OFFSET(alpha_param.power), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, FLAGS },
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{ NULL },
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};
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static const AVClass boxblur_class = {
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.class_name = "boxblur",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static const AVFilterPad avfilter_vf_boxblur_inputs[] = {
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{
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.name = "default",
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@ -364,6 +377,7 @@ AVFilter avfilter_vf_boxblur = {
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.name = "boxblur",
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.description = NULL_IF_CONFIG_SMALL("Blur the input."),
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.priv_size = sizeof(BoxBlurContext),
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.priv_class = &boxblur_class,
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.init = init,
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.uninit = uninit,
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.query_formats = query_formats,
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