js-dicom/src/ImageUtility/decoders/decodeJPEGBaseline.js

this is js-dicom

function decodeJPEGBaseline (imageFrame, pixelData) {
    // check to make sure codec is loaded
    if (typeof JpegImage === 'undefined') {
        throw 'No JPEG Baseline decoder loaded';
    }
    const jpeg = new JpegImage();

    jpeg.parse(pixelData);

    // Do not use the internal jpeg.js color transformation,
    // since we will handle this afterwards
    jpeg.colorTransform = false;

    if (imageFrame.bitsAllocated === 8) {
        imageFrame.pixelData = jpeg.getData(imageFrame.columns, imageFrame.rows);

        return imageFrame;
    } else if (imageFrame.bitsAllocated === 16) {
        imageFrame.pixelData = jpeg.getData16(imageFrame.columns, imageFrame.rows);

        return imageFrame;
    }
}

export default decodeJPEGBaseline;