Function JxlDecoderProcessInput 

pub unsafe extern "C-unwind" fn JxlDecoderProcessInput(
    dec: *mut JxlDecoder,
) -> JxlDecoderStatus

Decodes JPEG XL file using the available bytes. Requires input has been set with JxlDecoderSetInput. After JxlDecoderProcessInput, input can optionally be released with JxlDecoderReleaseInput and then set again to next bytes in the stream. JxlDecoderReleaseInput returns how many bytes are not yet processed, before a next call to JxlDecoderProcessInput all unprocessed bytes must be provided again (the address need not match, but the contents must), and more bytes may be concatenated after the unprocessed bytes.

The returned status indicates whether the decoder needs more input bytes, or more output buffer for a certain type of output data. No matter what the returned status is (other than JxlDecoderStatus::Error), new information, such as JxlDecoderGetBasicInfo, may have become available after this call. When the return value is not JxlDecoderStatus::Error or JxlDecoderStatus::Success, the decoding requires more JxlDecoderProcessInput calls to continue.

Parameters

• dec: decoder object

Returns

• JxlDecoderStatus::Success when decoding finished and all events handled. If you still have more unprocessed input data anyway, then you can still continue by using JxlDecoderSetInput and calling JxlDecoderProcessInput again, similar to handling JxlDecoderStatus::NeedMoreInput. JxlDecoderStatus::Success can occur instead of JxlDecoderStatus::NeedMoreInput when, for example, the input data ended right at the boundary of a box of the container format, all essential codestream boxes were already decoded, but extra metadata boxes are still present in the next data. JxlDecoderProcessInput cannot return success if all codestream boxes have not been seen yet.
• JxlDecoderStatus::Error when decoding failed, e.g. invalid codestream.
• JxlDecoderStatus::NeedMoreInput when more input data is necessary.
• JxlDecoderStatus::BasicInfo when basic info such as image dimensions is available and this informative event is subscribed to.
• JxlDecoderStatus::ColorEncoding when color profile information is available and this informative event is subscribed to.
• JxlDecoderStatus::PreviewImage when preview pixel information is available and output in the preview buffer.
• JxlDecoderStatus::FullImage when all pixel information at highest detail is available and has been output in the pixel buffer.