[FFmpeg-devel] [PATCH 2/2] avfilter/vf_hqdn3d: add support for commands

[Limin Wang]

On Thu, Nov 21, 2019 at 03:53:25PM +0100, Paul B Mahol wrote:
> Signed-off-by: Paul B Mahol <onemda at gmail.com>
> ---
>  doc/filters.texi        |  7 +++++++
>  libavfilter/vf_hqdn3d.c | 40 +++++++++++++++++++++++++++++++---------
>  2 files changed, 38 insertions(+), 9 deletions(-)
> 
> diff --git a/doc/filters.texi b/doc/filters.texi
> index cc192d634f..c88544408f 100644
> --- a/doc/filters.texi
> +++ b/doc/filters.texi
> @@ -11679,6 +11679,13 @@ A floating point number which specifies chroma temporal strength. It defaults to
>  @var{luma_tmp}*@var{chroma_spatial}/@var{luma_spatial}.
>  @end table
>  
> + at subsection Commands
> +This filter supports same @ref{commands} as options.
> +The command accepts the same syntax of the corresponding option.
> +
> +If the specified expression is not valid, it is kept at its current
> +value.
> +
>  @anchor{hwdownload}
>  @section hwdownload
>  
> diff --git a/libavfilter/vf_hqdn3d.c b/libavfilter/vf_hqdn3d.c
> index eac10bf261..803f90c28c 100644
> --- a/libavfilter/vf_hqdn3d.c
> +++ b/libavfilter/vf_hqdn3d.c
> @@ -172,13 +172,10 @@ static int denoise_depth(HQDN3DContext *s,
>          }                                                                     \
>      } while (0)
>  
> -static int16_t *precalc_coefs(double dist25, int depth)
> +static void precalc_coefs(double dist25, int depth, int16_t *ct)
>  {
>      int i;
>      double gamma, simil, C;
> -    int16_t *ct = av_malloc((512<<LUT_BITS)*sizeof(int16_t));
> -    if (!ct)
> -        return NULL;
>  
>      gamma = log(0.25) / log(1.0 - FFMIN(dist25,252.0)/255.0 - 0.00001);
>  
> @@ -190,7 +187,6 @@ static int16_t *precalc_coefs(double dist25, int depth)
>      }
>  
>      ct[0] = !!dist25;
> -    return ct;
>  }
>  
>  #define PARAM1_DEFAULT 4.0
> @@ -254,17 +250,26 @@ static int query_formats(AVFilterContext *ctx)
>      return ff_set_common_formats(ctx, fmts_list);
>  }
>  
> +static void calc_coefs(AVFilterContext *ctx)
> +{
> +    HQDN3DContext *s = ctx->priv;
> +
> +    for (int i = 0; i < 4; i++)
> +        precalc_coefs(s->strength[i], s->depth, s->coefs[i]);
> +}
> +
>  static int config_input(AVFilterLink *inlink)
>  {
> +    AVFilterContext *ctx = inlink->dst;
>      HQDN3DContext *s = inlink->dst->priv;
>      const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
> -    int i;
> +    int i, depth;
>  
>      uninit(inlink->dst);
>  
>      s->hsub  = desc->log2_chroma_w;
>      s->vsub  = desc->log2_chroma_h;
> -    s->depth = desc->comp[0].depth;
> +    s->depth = depth = desc->comp[0].depth;

It seems that depth is unused in the following code change?

>  
>      for (i = 0; i < 3; i++) {
>          s->line[i] = av_malloc_array(inlink->w, sizeof(*s->line[i]));
> @@ -273,11 +278,13 @@ static int config_input(AVFilterLink *inlink)
>      }
>  
>      for (i = 0; i < 4; i++) {
> -        s->coefs[i] = precalc_coefs(s->strength[i], s->depth);
> +        s->coefs[i] = av_malloc((512<<LUT_BITS) * sizeof(int16_t));
>          if (!s->coefs[i])
>              return AVERROR(ENOMEM);
>      }
>  
> +    calc_coefs(ctx);
> +
>      if (ARCH_X86)
>          ff_hqdn3d_init_x86(s);
>  
> @@ -346,8 +353,22 @@ 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)
> +{
> +    int ret;
> +
> +    ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
> +    if (ret < 0)
> +        return ret;
> +
> +    calc_coefs(ctx);
> +
> +    return 0;
> +}
> +
>  #define OFFSET(x) offsetof(HQDN3DContext, 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 hqdn3d_options[] = {
>      { "luma_spatial",   "spatial luma strength",    OFFSET(strength[LUMA_SPATIAL]),   AV_OPT_TYPE_DOUBLE, { .dbl = 0.0 }, 0, DBL_MAX, FLAGS },
>      { "chroma_spatial", "spatial chroma strength",  OFFSET(strength[CHROMA_SPATIAL]), AV_OPT_TYPE_DOUBLE, { .dbl = 0.0 }, 0, DBL_MAX, FLAGS },
> @@ -388,4 +409,5 @@ AVFilter ff_vf_hqdn3d = {
>      .inputs        = avfilter_vf_hqdn3d_inputs,
>      .outputs       = avfilter_vf_hqdn3d_outputs,
>      .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
> +    .process_command = process_command,
>  };
> -- 
> 2.17.1
> 
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