[FFmpeg-devel] [PATCH 3/4] lavfi/timeline: add passthrough callback.

[Michael Niedermayer]

On Mon, Apr 15, 2013 at 06:56:37PM +0200, Clément Bœsch wrote:
> ---
>  libavfilter/avfilter.c |  3 ++-
>  libavfilter/avfilter.h | 13 +++++++++++++
>  2 files changed, 15 insertions(+), 1 deletion(-)
> 
> diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
> index 8a5292d..65e04e7 100644
> --- a/libavfilter/avfilter.c
> +++ b/libavfilter/avfilter.c
> @@ -959,7 +959,8 @@ static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
>          dstctx->var_values[VAR_N] = link->frame_count;
>          dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
>          if (!((int)av_expr_eval(dstctx->enable, dstctx->var_values, NULL)))
> -            filter_frame = default_filter_frame;
> +            filter_frame = dst->passthrough_filter_frame ? dst->passthrough_filter_frame
> +                                                         : default_filter_name;
>      }
>      ret = filter_frame(link, out);
>      link->frame_count++;
> diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
> index a5518f7..a092ad2 100644
> --- a/libavfilter/avfilter.h
> +++ b/libavfilter/avfilter.h
> @@ -336,6 +336,19 @@ struct AVFilterPad {
>      int (*filter_frame)(AVFilterLink *link, AVFrame *frame);
>  
>      /**
> +     * Passthrough filtering callback.
> +     *
> +     * If a filter support timeline editing (AVFILTER_FLAG_SUPPORT_TIMELINE)
> +     * then it can implement a custom passthrough callback to update its local
> +     * context (for example to keep a frame reference, or simply send the
> +     * filter to a custom outlink). The filter is obviously not supposed to do
> +     * any change to the frame in this callback.
> +     *
> +     * Input pads only.
> +     */
> +    int (*passthrough_filter_frame)(AVFilterLink *link, AVFrame *frame);
> +
> +    /**
>       * Frame poll callback. This returns the number of immediately available

shouldnt new fields be added at the end of the structure ?

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

He who knows, does not speak. He who speaks, does not know. -- Lao Tsu
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