[FFmpeg-devel] [PATCH] lavu/videotoolbox: add support for memory mapping frames

[Aman Karmani]

On Sun, Jan 2, 2022 at 4:33 PM Cameron Gutman <aicommander at gmail.com> wrote:

> Signed-off-by: Cameron Gutman <aicommander at gmail.com>
> ---
>  libavutil/hwcontext_videotoolbox.c | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
>
> diff --git a/libavutil/hwcontext_videotoolbox.c
> b/libavutil/hwcontext_videotoolbox.c
> index 0a8dbe9f33..026127d412 100644
> --- a/libavutil/hwcontext_videotoolbox.c
> +++ b/libavutil/hwcontext_videotoolbox.c
> @@ -711,6 +711,30 @@ fail:
>      return err;
>  }
>
> +static int vt_map_from(AVHWFramesContext *hwfc, AVFrame *dst,
> +                       const AVFrame *src, int flags)
> +{
> +    int err;
> +
> +    if (dst->format == AV_PIX_FMT_NONE)
> +        dst->format = hwfc->sw_format;
> +    else if (dst->format != hwfc->sw_format)
> +        return AVERROR(ENOSYS);
> +
> +    err = vt_map_frame(hwfc, dst, src, flags);
> +    if (err)
> +        return err;
> +
> +    dst->width  = src->width;
> +    dst->height = src->height;
> +
> +    err = av_frame_copy_props(dst, src);
> +    if (err)
> +        return err;
> +
> +    return 0;
> +}
> +
>  static int vt_device_create(AVHWDeviceContext *ctx, const char *device,
>                              AVDictionary *opts, int flags)
>  {
> @@ -736,6 +760,7 @@ const HWContextType ff_hwcontext_type_videotoolbox = {
>      .transfer_get_formats = vt_transfer_get_formats,
>      .transfer_data_to     = vt_transfer_data_to,
>      .transfer_data_from   = vt_transfer_data_from,
> +    .map_from             = vt_map_from,


Thanks for this!

Does this add support for hwdownload filter? Or what's the best way to test
this patch?

Aman


>
>      .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_VIDEOTOOLBOX,
> AV_PIX_FMT_NONE },
>  };
> --
> 2.25.1
>
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