[FFmpeg-devel] [PATCH v2 2/3] libavcodec: add a new AV_CODEC_EXPORT_DATA_FILM_GRAIN flag and option

[Anton Khirnov]

Quoting Lynne (2020-11-12 18:42:22)
> This introduces a new field to allow decoders to export their film grain 
> parameters.
> Will be used by the next patch.
> 
> Patch attached.
> From d5d5e1e5f90938ac5cfa462efc13658ab411246b Mon Sep 17 00:00:00 2001
> From: Lynne <dev at lynne.ee>
> Date: Thu, 12 Nov 2020 17:46:09 +0100
> Subject: [PATCH v2 2/3] libavcodec: add a new AV_CODEC_EXPORT_DATA_FILM_GRAIN
>  flag and option
> 
> This introduces a new field to allow decoders to export their film grain
> parameters.
> Will be used by the next patch.
> ---
>  doc/APIchanges             | 3 +++
>  libavcodec/avcodec.h       | 5 +++++
>  libavcodec/options_table.h | 1 +
>  libavcodec/version.h       | 4 ++--
>  4 files changed, 11 insertions(+), 2 deletions(-)
> 
> diff --git a/doc/APIchanges b/doc/APIchanges
> index 41248724d9..9d0ddb4ff6 100644
> --- a/doc/APIchanges
> +++ b/doc/APIchanges
> @@ -15,6 +15,9 @@ libavutil:     2017-10-21
>  
>  API changes, most recent first:
>  
> +2020-xx-xx - xxxxxxxxxx - lavc 58.113.100 - avcodec.h
> +  Adds a new flag AV_CODEC_EXPORT_DATA_FILM_GRAIN for export_side_data.
> +
>  2020-xx-xx - xxxxxxxxxx - lavu 56.61.100 - film_grain_params.h
>    Adds a new API for extracting codec film grain parameters as side data.
>    Adds a new AVFrameSideDataType entry AV_FRAME_DATA_FILM_GRAIN_PARAMS for it.
> diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
> index 20af3ef00d..5047da0f6a 100644
> --- a/libavcodec/avcodec.h
> +++ b/libavcodec/avcodec.h
> @@ -410,6 +410,11 @@ typedef struct RcOverride{
>   * Export the AVVideoEncParams structure through frame side data.
>   */
>  #define AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS (1 << 2)
> +/**
> + * Decoding only.
> + * Do not apply film grain, export it instead.

Could someone want to both apply AND export it?

-- 
Anton Khirnov