[FFmpeg-devel] [PATCH 2/2] lavfi/showinfo: support regions of interest sidedata

[Guo, Yejun]

> -----Original Message-----
> From: ffmpeg-devel [mailto:ffmpeg-devel-bounces at ffmpeg.org] On Behalf
> Of Jun Zhao
> Sent: Saturday, March 09, 2019 4:34 PM
> To: ffmpeg-devel at ffmpeg.org
> Cc: Jun Zhao <barryjzhao at tencent.com>
> Subject: [FFmpeg-devel] [PATCH 2/2] lavfi/showinfo: support regions of
> interest sidedata
> 
> From: Jun Zhao <barryjzhao at tencent.com>
> 
> support regions of interest sidedata
> 
> Signed-off-by: Jun Zhao <barryjzhao at tencent.com>
> ---
>  libavfilter/vf_showinfo.c |   23 +++++++++++++++++++++++
>  1 files changed, 23 insertions(+), 0 deletions(-)
> 
> diff --git a/libavfilter/vf_showinfo.c b/libavfilter/vf_showinfo.c
> index 9e84197..b51c1ae 100644
> --- a/libavfilter/vf_showinfo.c
> +++ b/libavfilter/vf_showinfo.c
> @@ -111,6 +111,26 @@ static void dump_stereo3d(AVFilterContext *ctx,
> AVFrameSideData *sd)
>          av_log(ctx, AV_LOG_INFO, " (inverted)");
>  }
> 
> +static void dump_roi(AVFilterContext *ctx, AVFrameSideData *sd)
> +{
> +    AVRegionOfInterest *roi;
> +    int nb_rois;
> +
> +    if (sd->size < sizeof(*roi)) {
> +        av_log(ctx, AV_LOG_INFO, "invalid data");
> +        return;
> +    }

roi = (const AVRegionOfInterest *)sd->data;
if (roi->self_size == 0 || sd->size % roi->self_size != 0) {
    //report error and return.
}

> +
> +    roi = (AVRegionOfInterest *)sd->data;
> +    nb_rois = sd->size / sizeof(*roi);

nb_rois = sd->size / roi->self_size;

> +
> +    av_log(ctx, AV_LOG_INFO, "Regions Of Interest(RoI) informations: ");
> +    for (int index = 0; index < nb_rois; index++) {
> +        av_log(ctx, AV_LOG_INFO, "index: %d, region: (%d %d)/(%d %d), qp
> offset: %d/%d",
> +               index, roi->left, roi->top, roi->right, roi->bottom, roi->qoffset.num,
> roi->qoffset.den);
> +    }
> +}
> +
>  static void dump_color_property(AVFilterContext *ctx, AVFrame *frame)
>  {
>      const char *color_range_str     = av_color_range_name(frame-
> >color_range);
> @@ -246,6 +266,9 @@ static int filter_frame(AVFilterLink *inlink, AVFrame
> *frame)
>          case AV_FRAME_DATA_AFD:
>              av_log(ctx, AV_LOG_INFO, "afd: value of %"PRIu8, sd->data[0]);
>              break;
> +        case AV_FRAME_DATA_REGIONS_OF_INTEREST:
> +            dump_roi(ctx, sd);
> +            break;
>          default:
>              av_log(ctx, AV_LOG_WARNING, "unknown side data type %d (%d
> bytes)",
>                     sd->type, sd->size);
> --
> 1.7.1
> 
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