[FFmpeg-devel] [PATCH V2] lavfi/hqdn3d: add slice thread optimization

[Paul B Mahol]

On 10/8/19, Jun Zhao <mypopydev at gmail.com> wrote:
> From: Jun Zhao <barryjzhao at tencent.com>
>
> Enabled one thread per planar, used the test command for 1080P video
> (YUV420P format) as follow:
>
> ffmpeg -i 1080p.mp4 -an -vf hqdn3d -f null /dev/nul
>
> This optimization improved the performance about 30% in 1080P YUV420P
> case (from 110fps to 143fps), also pass the framemd5 check and FATE.
>
> Signed-off-by: Jun Zhao <barryjzhao at tencent.com>
> ---
>  libavfilter/vf_hqdn3d.c |   56
> +++++++++++++++++++++++++++++++++-------------
>  libavfilter/vf_hqdn3d.h |    2 +-
>  2 files changed, 41 insertions(+), 17 deletions(-)
>
> diff --git a/libavfilter/vf_hqdn3d.c b/libavfilter/vf_hqdn3d.c
> index d6c14bb..6dd8fd8 100644
> --- a/libavfilter/vf_hqdn3d.c
> +++ b/libavfilter/vf_hqdn3d.c
> @@ -223,7 +223,9 @@ static av_cold void uninit(AVFilterContext *ctx)
>      av_freep(&s->coefs[1]);
>      av_freep(&s->coefs[2]);
>      av_freep(&s->coefs[3]);
> -    av_freep(&s->line);
> +    av_freep(&s->line[0]);
> +    av_freep(&s->line[1]);
> +    av_freep(&s->line[2]);
>      av_freep(&s->frame_prev[0]);
>      av_freep(&s->frame_prev[1]);
>      av_freep(&s->frame_prev[2]);
> @@ -271,9 +273,11 @@ static int config_input(AVFilterLink *inlink)
>      s->vsub  = desc->log2_chroma_h;
>      s->depth = desc->comp[0].depth;
>
> -    s->line = av_malloc_array(inlink->w, sizeof(*s->line));
> -    if (!s->line)
> -        return AVERROR(ENOMEM);
> +    for (i = 0; i < 3; i++) {
> +        s->line[i] = av_malloc_array(inlink->w, sizeof(*s->line[i]));
> +        if (!s->line[i])
> +            return AVERROR(ENOMEM);
> +    }
>
>      for (i = 0; i < 4; i++) {
>          s->coefs[i] = precalc_coefs(s->strength[i], s->depth);
> @@ -287,14 +291,38 @@ static int config_input(AVFilterLink *inlink)
>      return 0;
>  }
>
> +struct ThreadData {
> +    AVFrame *in, *out;
> +    int direct;
> +};
> +
> +static int do_denoise(AVFilterContext *ctx, void *data, int job_nr, int
> n_jobs)
> +{
> +    HQDN3DContext *s = ctx->priv;
> +    struct ThreadData *td = data;
> +    AVFrame *out = td->out;
> +    AVFrame *in = td->in;
> +    int direct = td->direct;

looks unused.

> +
> +    denoise(s, in->data[job_nr], out->data[job_nr],
> +                s->line[job_nr], &s->frame_prev[job_nr],
> +                AV_CEIL_RSHIFT(in->width,  (!!job_nr * s->hsub)),
> +                AV_CEIL_RSHIFT(in->height, (!!job_nr * s->vsub)),
> +                in->linesize[job_nr], out->linesize[job_nr],
> +                s->coefs[job_nr ? CHROMA_SPATIAL : LUMA_SPATIAL],
> +                s->coefs[job_nr ? CHROMA_TMP     : LUMA_TMP]);
> +
> +    return 0;
> +}
> +
>  static int filter_frame(AVFilterLink *inlink, AVFrame *in)
>  {
>      AVFilterContext *ctx  = inlink->dst;
> -    HQDN3DContext *s = ctx->priv;
>      AVFilterLink *outlink = ctx->outputs[0];
>
>      AVFrame *out;
> -    int c, direct = av_frame_is_writable(in) && !ctx->is_disabled;
> +    int direct = av_frame_is_writable(in) && !ctx->is_disabled;
> +    struct ThreadData td;
>
>      if (direct) {
>          out = in;
> @@ -308,15 +336,11 @@ static int filter_frame(AVFilterLink *inlink, AVFrame
> *in)
>          av_frame_copy_props(out, in);
>      }
>
> -    for (c = 0; c < 3; c++) {
> -        denoise(s, in->data[c], out->data[c],
> -                s->line, &s->frame_prev[c],
> -                AV_CEIL_RSHIFT(in->width,  (!!c * s->hsub)),
> -                AV_CEIL_RSHIFT(in->height, (!!c * s->vsub)),
> -                in->linesize[c], out->linesize[c],
> -                s->coefs[c ? CHROMA_SPATIAL : LUMA_SPATIAL],
> -                s->coefs[c ? CHROMA_TMP     : LUMA_TMP]);
> -    }
> +    td.in = in;
> +    td.out = out;
> +    td.direct = direct;
> +    /* one thread per planar */
> +    ctx->internal->execute(ctx, do_denoise, &td, NULL, 3);
>
>      if (ctx->is_disabled) {
>          av_frame_free(&out);
> @@ -370,5 +394,5 @@ AVFilter ff_vf_hqdn3d = {
>      .query_formats = query_formats,
>      .inputs        = avfilter_vf_hqdn3d_inputs,
>      .outputs       = avfilter_vf_hqdn3d_outputs,
> -    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
> +    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
> AVFILTER_FLAG_SLICE_THREADS,
>  };
> diff --git a/libavfilter/vf_hqdn3d.h b/libavfilter/vf_hqdn3d.h
> index 03a79a1..3279bbc 100644
> --- a/libavfilter/vf_hqdn3d.h
> +++ b/libavfilter/vf_hqdn3d.h
> @@ -31,7 +31,7 @@
>  typedef struct HQDN3DContext {
>      const AVClass *class;
>      int16_t *coefs[4];
> -    uint16_t *line;
> +    uint16_t *line[3];
>      uint16_t *frame_prev[3];
>      double strength[4];
>      int hsub, vsub;
> --
> 1.7.1
>
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