On 9/26/2024 3:00 AM, Anton Khirnov wrote:
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 <jamr...@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?
There is no other information than "This is a gainmap", and that's container level information (Same as "This is a tile" for heif). How would side data work for this? I'm including it in the tile grid stream group in patch 4/4, so that should give the caller all the information they need.
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