[FFmpeg-devel] [PATCH 1/4] avformat/avformat: add a new disposition to signal the stream is an HDR gainmap

[Anton Khirnov]

Quoting James Almer (2024-09-26 00:52:16)
> HDR images photos taken by certain cameras split this as a separate image.
> 
> Signed-off-by: James Almer <jamrial at gmail.com>
> ---
>  libavformat/avformat.h | 5 +++++
>  libavformat/dump.c     | 2 ++
>  2 files changed, 7 insertions(+)
> 
> diff --git a/libavformat/avformat.h b/libavformat/avformat.h
> index 56c1c80289..6d9f5c4399 100644
> --- a/libavformat/avformat.h
> +++ b/libavformat/avformat.h
> @@ -718,6 +718,11 @@ typedef struct AVIndexEntry {
>   * Annex G/H, or HEVC Annex F).
>   */
>  #define AV_DISPOSITION_MULTILAYER           (1 << 21)
> +/**
> + * The video stream contains an HDR gainmap. Only ever used with
> + * AV_DISPOSITION_DEPENDENT.
> + */
> +#define AV_DISPOSITION_GAINMAP              (1 << 22)

Presumably we want this information available in codecs and filters as
well, so then should it not be side data instead?

-- 
Anton Khirnov