Function JxlDecoderGetExtraChannelInfo 

pub unsafe extern "C-unwind" fn JxlDecoderGetExtraChannelInfo(
    dec: *const JxlDecoder,
    index: usize,
    info: *mut JxlExtraChannelInfo,
) -> JxlDecoderStatus

Outputs information for extra channel at the given index. The index must be smaller than num_extra_channels in the associated JxlBasicInfo.

Parameters

• dec: decoder object
• index: index of the extra channel to query.
• info: struct to copy the information into, or NULL to only check whether the information is available through the return value.

Returns

• JxlDecoderStatus::Success if the value is available
• JxlDecoderStatus::NeedMoreInput if not yet available
• JxlDecoderStatus::Error in case of other error conditions.