Quoting OvchinnikovDmitrii (2022-10-07 16:59:40)
> ---
> libavcodec/avcodec.h | 35 +++++++++++++++++++++++++++++++++++
> libavcodec/codec_par.h | 8 ++++++++
> libavcodec/options_table.h | 4 ++++
> 3 files changed, 47 insertions(+)
>
> diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
> index 7365eb5cc0..d28a7cc022 100644
> --- a/libavcodec/avcodec.h
> +++ b/libavcodec/avcodec.h
> @@ -380,6 +380,19 @@ typedef struct RcOverride{
> */
> #define AV_GET_ENCODE_BUFFER_FLAG_REF (1 << 0)
>
> +/**
> +* Video decoding only. Certain container support cropping, meaning that
> +* only a sub-rectangle of the decoded frame is intended for display.
> +* Certain codec supports cropping as well.This option controls how
> +* cropping is handled by libavcodec when container cropping and
> +* codec cropping exist.
> +*/
> +enum CONTAINER_CROPPING_POLICY_TYPE {
> + FF_CONTAINER_CROPPING_IGNORE = 0,
> + FF_CONTAINER_CROPPING_ADDITION,
> + FF_CONTAINER_CROPPING_OVERWRITE
> +};
> +
> struct AVCodecInternal;
>
> /**
> @@ -2057,6 +2070,28 @@ typedef struct AVCodecContext {
> * The decoder can then override during decoding as needed.
> */
> AVChannelLayout ch_layout;
> +
> + /* When set to 1 (the default), libavcodec will apply container cropping
> + * to codec cropping additionally.
> + *
> + * When set to 2, libavcodec will use container cropping to overwrite
> + * codec cropping (the final cropping uses container cropping parameters)
> + *
> + * When set to 0, libavcodec will ignore container cropping parameters
> + * (the final cropping uses codec cropping parameters)
> + *
> + * This field works with "apply_cropping". Only if apply_cropping is 1,
> this
> + * field works
> + */
> + enum CONTAINER_CROPPING_POLICY_TYPE container_apply_cropping;
> +
> + /**
> + * The cropping parameters from container.
> + */
> + int container_crop_top;
> + int container_crop_left;
> + int container_crop_bottom;
> + int container_crop_right;
I don't see why should a decoder deal with this at all? This can be just
as well done by the caller.
--
Anton Khirnov
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