Re: [FFmpeg-devel] [PATCH] avfilter/vf_frei0r: Copy to frame allocated according to frei0r requirements

[James Almer <jamrial@gmail.com>]

On 4/11/2022 10:31 AM, Michael Niedermayer wrote:
> Fixes: issues with non trivial linesize
> 
> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
> ---
>   libavfilter/vf_frei0r.c | 40 ++++++++++++++++++++++++++++++++--------
>   1 file changed, 32 insertions(+), 8 deletions(-)
> 
> diff --git a/libavfilter/vf_frei0r.c b/libavfilter/vf_frei0r.c
> index 9cd0098e73..c9b698897f 100644
> --- a/libavfilter/vf_frei0r.c
> +++ b/libavfilter/vf_frei0r.c
> @@ -349,18 +349,41 @@ static int query_formats(AVFilterContext *ctx)
>       return ff_set_common_formats(ctx, formats);
>   }
>   
> +static AVFrame *getframe(AVFilterLink *link)
> +{
> +    int ret;
> +    AVFrame *frame = av_frame_alloc();
> +    if (!frame)
> +        return NULL;
> +
> +    frame->width  = link->w;
> +    frame->height = link->h;
> +    frame->format = link->format;
> +    ret = av_frame_get_buffer(frame, 16);

Maybe ff_get_video_buffer can be updated to accept an align argument 
which would be used instead of av_cpu_max_align() when not 0, so we 
don't lose the benefits of the frame pool it provides?

> +    if (ret < 0)
> +        av_frame_free(&frame);
> +
> +    return frame;
> +}
> +
>   static int filter_frame(AVFilterLink *inlink, AVFrame *in)
>   {
>       Frei0rContext *s = inlink->dst->priv;
>       AVFilterLink *outlink = inlink->dst->outputs[0];
> -    AVFrame *out;
> +    AVFrame *out = getframe(outlink);
> +    if (!out)
> +        goto fail;
>   
> -    out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
> -    if (!out) {
> +    av_frame_copy_props(out, in);
> +
> +    if (in->linesize[0] != out->linesize[0]) {
> +        AVFrame *in2 = getframe(outlink);
> +        if (!in2)
> +            goto fail;
> +        av_frame_copy(in2, in);
>           av_frame_free(&in);
> -        return AVERROR(ENOMEM);
> +        in = in2;
>       }
> -    av_frame_copy_props(out, in);
>   
>       s->update(s->instance, in->pts * av_q2d(inlink->time_base) * 1000,
>                      (const uint32_t *)in->data[0],
> @@ -369,6 +392,10 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
>       av_frame_free(&in);
>   
>       return ff_filter_frame(outlink, out);
> +fail:
> +    av_frame_free(&in);
> +    av_frame_free(&out);
> +    return AVERROR(ENOMEM);
>   }
>   
>   static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
> @@ -473,9 +500,6 @@ static int source_request_frame(AVFilterLink *outlink)
>       frame->sample_aspect_ratio = (AVRational) {1, 1};
>       frame->pts = s->pts++;
>   
> -    s->update(s->instance, av_rescale_q(frame->pts, s->time_base, (AVRational){1,1000}),
> -                   NULL, (uint32_t *)frame->data[0]);
> -
>       return ff_filter_frame(outlink, frame);
>   }
>   
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