diff options
Diffstat (limited to 'libavfilter/vf_gradfun.c')
-rw-r--r-- | libavfilter/vf_gradfun.c | 31 |
1 files changed, 23 insertions, 8 deletions
diff --git a/libavfilter/vf_gradfun.c b/libavfilter/vf_gradfun.c index 6319bf7d28..2e92fdacb8 100644 --- a/libavfilter/vf_gradfun.c +++ b/libavfilter/vf_gradfun.c @@ -36,12 +36,24 @@ #include "libavutil/common.h" #include "libavutil/cpu.h" #include "libavutil/pixdesc.h" +#include "libavutil/opt.h" #include "avfilter.h" #include "formats.h" #include "gradfun.h" #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}, @@ -121,16 +133,18 @@ static void filter(GradFunContext *ctx, uint8_t *dst, const uint8_t *src, int wi static av_cold int init(AVFilterContext *ctx, const char *args) { + int ret; GradFunContext *gf = ctx->priv; - float thresh = 1.2; - int radius = 16; + static const char *shorthand[] = { "strength", "radius", NULL }; + + gf->class = &gradfun_class; + av_opt_set_defaults(gf); - if (args) - sscanf(args, "%f:%d", &thresh, &radius); + if ((ret = av_opt_set_from_string(gf, args, shorthand, "=", ":")) < 0) + return ret; - thresh = av_clipf(thresh, 0.51, 64); - gf->thresh = (1 << 15) / thresh; - gf->radius = av_clip((radius + 1) & ~1, 4, 32); + gf->thresh = (1 << 15) / gf->strength; + 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; @@ -138,7 +152,7 @@ static av_cold int init(AVFilterContext *ctx, const char *args) if (ARCH_X86) ff_gradfun_init_x86(gf); - av_log(ctx, AV_LOG_VERBOSE, "threshold:%.2f radius:%d\n", thresh, gf->radius); + av_log(ctx, AV_LOG_VERBOSE, "threshold:%.2f radius:%d\n", gf->strength, gf->radius); return 0; } @@ -252,4 +266,5 @@ AVFilter avfilter_vf_gradfun = { .inputs = avfilter_vf_gradfun_inputs, .outputs = avfilter_vf_gradfun_outputs, + .priv_class = &gradfun_class, }; |