Re: [FFmpeg-devel] [PATCH 2/2] avfilter/vf_tpad: accept hardware frames in clone-only mode

[Marvin Scholz <epirat07@gmail.com>]

On 19 Apr 2023, at 12:42, Marvin Scholz wrote:

> When no drawing is to be performed, tpad can work fine with
> hardware frames, so advertise this in the query_formats
> callback and ensure the drawing context is never initialized
> when just cloning frames.
> ---
>  libavfilter/vf_tpad.c | 15 ++++++++++++---
>  1 file changed, 12 insertions(+), 3 deletions(-)
>
> diff --git a/libavfilter/vf_tpad.c b/libavfilter/vf_tpad.c
> index 88c3c99de4..9a9d06a8b8 100644
> --- a/libavfilter/vf_tpad.c
> +++ b/libavfilter/vf_tpad.c
> @@ -71,7 +71,13 @@ AVFILTER_DEFINE_CLASS(tpad);
>
>  static int query_formats(AVFilterContext *ctx)
>  {
> -    return ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
> +    TPadContext *s = ctx->priv;
> +    if ((s->stop_mode == MODE_ADD && s->pad_stop != 0) ||
> +        (s->start_mode == MODE_ADD && s->pad_start != 0))
> +        return ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
> +
> +    fprintf(stderr, "ONLY COPY\n");

Apparently I am not fully awake yet and forgot to update the commit with the removal
of this debug output… Will obviously be removed in the next iteration.

> +    return ff_set_common_formats(ctx, ff_all_formats(AVMEDIA_TYPE_VIDEO));
>  }
>
>  static int activate(AVFilterContext *ctx)
> @@ -190,8 +196,11 @@ static int config_input(AVFilterLink *inlink)
>      AVFilterContext *ctx = inlink->dst;
>      TPadContext *s = ctx->priv;
>
> -    ff_draw_init(&s->draw, inlink->format, 0);
> -    ff_draw_color(&s->draw, &s->color, s->rgba_color);
> +    if ((s->stop_mode == MODE_ADD && s->pad_stop != 0) ||
> +        (s->start_mode == MODE_ADD && s->pad_start != 0)) {
> +        ff_draw_init(&s->draw, inlink->format, 0);
> +        ff_draw_color(&s->draw, &s->color, s->rgba_color);
> +    }
>
>      if (s->start_duration)
>          s->pad_start = av_rescale_q(s->start_duration, inlink->frame_rate, av_inv_q(AV_TIME_BASE_Q));
> -- 
> 2.37.0 (Apple Git-136)
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