[FFmpeg-devel] [PATCH V3] avfilter/vf_bilateral: process command to set the parameter at runtime

[Tao Zhang]

Good weekend. Is it ok or any more suggestions?

Tao Zhang <nowerzt at gmail.com> 于2019年10月28日周一 下午2:53写道：
>
> ping
>
> leozhang <leozhang at qiyi.com> 于2019年10月24日周四 下午5:18写道：
> >
> > Reviewed-by: Paul B Mahol <onemda at gmail.com>
> > Reviewed-by: Jun Zhao <mypopy at gmail.com>
> > Signed-off-by: leozhang <leozhang at qiyi.com>
> > ---
> >  libavfilter/vf_bilateral.c | 57 ++++++++++++++++++++++++++++++++++------------
> >  1 file changed, 43 insertions(+), 14 deletions(-)
> >
> > diff --git a/libavfilter/vf_bilateral.c b/libavfilter/vf_bilateral.c
> > index 3c9d800..4d7bf68 100644
> > --- a/libavfilter/vf_bilateral.c
> > +++ b/libavfilter/vf_bilateral.c
> > @@ -29,6 +29,8 @@
> >  #include "internal.h"
> >  #include "video.h"
> >
> > +#include <float.h>
> > +
> >  typedef struct BilateralContext {
> >      const AVClass *class;
> >
> > @@ -54,7 +56,7 @@ typedef struct BilateralContext {
> >  } BilateralContext;
> >
> >  #define OFFSET(x) offsetof(BilateralContext, x)
> > -#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
> > +#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
> >
> >  static const AVOption bilateral_options[] = {
> >      { "sigmaS", "set spatial sigma",    OFFSET(sigmaS), AV_OPT_TYPE_FLOAT, {.dbl=0.1}, 0.0,  10, FLAGS },
> > @@ -91,19 +93,27 @@ static int query_formats(AVFilterContext *ctx)
> >      return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
> >  }
> >
> > -static int config_input(AVFilterLink *inlink)
> > +static int init_lut(BilateralContext *s)
> >  {
> > -    BilateralContext *s = inlink->dst->priv;
> > -    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
> >      float inv_sigma_range;
> >
> > -    s->depth = desc->comp[0].depth;
> >      inv_sigma_range = 1.0f / (s->sigmaR * ((1 << s->depth) - 1));
> >
> >      //compute a lookup table
> >      for (int i = 0; i < (1 << s->depth); i++)
> >          s->range_table[i] = expf(-i * inv_sigma_range);
> >
> > +    return 0;
> > +}
> > +
> > +static int config_input(AVFilterLink *inlink)
> > +{
> > +    BilateralContext *s = inlink->dst->priv;
> > +    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
> > +
> > +    s->depth = desc->comp[0].depth;
> > +    init_lut(s);
> > +
> >      s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
> >      s->planewidth[0] = s->planewidth[3] = inlink->w;
> >      s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
> > @@ -325,6 +335,24 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
> >      return ff_filter_frame(outlink, out);
> >  }
> >
> > +static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
> > +                           char *res, int res_len, int flags)
> > +{
> > +    BilateralContext *s = ctx->priv;
> > +    int ret;
> > +    float old_sigmaR = s->sigmaR;
> > +
> > +    if ((ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags)) < 0) {
> > +        return ret;
> > +    }
> > +
> > +    if (fabs(old_sigmaR - s->sigmaR) > FLT_EPSILON && (ret = init_lut(s)) < 0) {
> > +        s->sigmaR = old_sigmaR;
> > +    }
> > +
> > +    return ret;
> > +}
> > +
> >  static av_cold void uninit(AVFilterContext *ctx)
> >  {
> >      BilateralContext *s = ctx->priv;
> > @@ -358,13 +386,14 @@ static const AVFilterPad bilateral_outputs[] = {
> >  };
> >
> >  AVFilter ff_vf_bilateral = {
> > -    .name          = "bilateral",
> > -    .description   = NULL_IF_CONFIG_SMALL("Apply Bilateral filter."),
> > -    .priv_size     = sizeof(BilateralContext),
> > -    .priv_class    = &bilateral_class,
> > -    .uninit        = uninit,
> > -    .query_formats = query_formats,
> > -    .inputs        = bilateral_inputs,
> > -    .outputs       = bilateral_outputs,
> > -    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
> > +    .name            = "bilateral",
> > +    .description     = NULL_IF_CONFIG_SMALL("Apply Bilateral filter."),
> > +    .priv_size       = sizeof(BilateralContext),
> > +    .priv_class      = &bilateral_class,
> > +    .uninit          = uninit,
> > +    .query_formats   = query_formats,
> > +    .inputs          = bilateral_inputs,
> > +    .outputs         = bilateral_outputs,
> > +    .flags           = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
> > +    .process_command = process_command,
> >  };
> > --
> > 1.8.3.1
> >
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