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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | 428x | import type { ByteArray } from 'dicom-parser';
import type { Types } from '@cornerstonejs/core';
import type { WebWorkerDecodeConfig } from '../../types';
const local = {
JpegImage: undefined,
decodeConfig: {} as WebWorkerDecodeConfig,
};
export function initialize(
decodeConfig?: WebWorkerDecodeConfig
): Promise<void> {
local.decodeConfig = decodeConfig;
if (local.JpegImage) {
return Promise.resolve();
}
return new Promise((resolve, reject) => {
import('../../codecs/jpeg')
.then((module) => {
local.JpegImage = module.default;
resolve();
})
.catch(reject);
});
}
async function decodeJPEGBaseline12BitAsync(
imageFrame: Types.IImageFrame,
pixelData: ByteArray
): Promise<Types.IImageFrame> {
// check to make sure codec is loaded
await initialize();
if (typeof local.JpegImage === 'undefined') {
throw new Error('No JPEG Baseline decoder loaded');
}
const jpeg = new local.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 decodeJPEGBaseline12BitAsync;
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