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import type { EXIFField } from './database.js';
import type { RuntimeValue } from './schemas/metadata.js';
import LibRaw from 'libraw-wasm';
import { GPSHelper } from 'piexifjs';
import { coerceExifValue } from './exif.js';
import { openDatabase, tables } from './idb.svelte.js';
import { storeMetadataValue } from './metadata/storage.js';
export const RAW_IMAGE_FILE_EXTENSIONS = [
'.3fr',
'.ari',
'.arw',
'.bay',
'.braw',
'.crw',
'.cr2',
'.cr3',
'.cap',
'.data',
'.dcs',
'.dcr',
'.dng',
'.drf',
'.eip',
'.erf',
'.fff',
'.gpr',
'.iiq',
'.k25',
'.kdc',
'.mdc',
'.mef',
'.mos',
'.mrw',
'.nef',
'.nrw',
'.obm',
'.orf',
'.pef',
'.ptx',
'.pxn',
'.r3d',
'.raf',
'.raw',
'.rwl',
'.rw2',
'.rwz',
'.sr2',
'.srf',
'.srw',
'.tif',
'.x3f',
];
export const RAW_IMAGE_MEDIA_TYPES = [
'image/CR2',
'image/x-canon-cr2',
'image/x-dcraw',
'image/x-canon-crw',
'image/x-kodak-dcr',
'image/x-adobe-dng',
'image/x-epson-erf',
'image/x-kodak-k25',
'image/x-kodak-kdc',
'image/x-minolta-mrw',
'image/x-nikon-nef',
'image/x-olympus-orf',
'image/x-pentax-pef',
'image/x-fuji-raf',
'image/x-panasonic-raw',
'image/x-sony-sr2',
'image/x-sony-srf',
'image/x-sigma-x3f',
];
export function isRawImage(file: Pick<File, 'type' | 'name'>) {
return (
RAW_IMAGE_MEDIA_TYPES.includes(file.type) ||
RAW_IMAGE_FILE_EXTENSIONS.some((ext) => file.name.toLocaleLowerCase().endsWith(ext))
);
}
async function decodeRawPhoto(bytes: ArrayBuffer): Promise<{
imageData: ImageData;
metadata: import('libraw-wasm').Metadata | undefined;
}> {
const raw = new LibRaw();
await raw.open(new Uint8Array(bytes));
const metadata = await raw.metadata(true);
const decoded = await raw.imageData();
if (!decoded) {
throw new Error('Failed to decode raw photo');
}
const { width, height, data: pixels } = decoded;
const imageData = new ImageData(width, height);
// Fill imageData. Note that pixels stores in the following order: R/G/B first -> height -> width
for (let i = 0; i < pixels.length / 3; i++) {
imageData.data[i * 4 + 0] = pixels[i * 3 + 0];
imageData.data[i * 4 + 1] = pixels[i * 3 + 1];
imageData.data[i * 4 + 2] = pixels[i * 3 + 2];
imageData.data[i * 4 + 3] = 255;
}
return { imageData, metadata };
}
/**
* Transcode a raw photo into JPEG format.
*/
export async function transcodeRawPhotoToJPEG(bytes: ArrayBuffer): Promise<{
bytes: ArrayBuffer;
metadata: import('libraw-wasm').Metadata | undefined;
}> {
const { imageData, metadata } = await decodeRawPhoto(bytes);
console.debug('Decoded raw photo, got metadata:', metadata);
const canvas = new OffscreenCanvas(imageData.width, imageData.height);
const ctx = canvas.getContext('2d');
ctx?.putImageData(imageData, 0, 0);
const blob = await canvas.convertToBlob({ type: 'image/jpeg' });
const buf = await blob.arrayBuffer();
return { bytes: buf, metadata };
}
export async function processRawMetadata(
sessionId: string,
imageFileId: string,
metadata: import('libraw-wasm').Metadata
) {
const session = await tables.Session.get(sessionId);
if (!session) {
throw new Error(`Session with id ${sessionId} not found`);
}
const protocol = await tables.Protocol.get(session.protocol);
if (!protocol) {
throw new Error(`Protocol with id ${session.protocol} not found`);
}
const metadataDefs = await tables.Metadata.list().then((defs) =>
defs.filter(
(
def
): def is typeof def & {
infer:
| { exif: EXIFField }
| { latitude: { exif: EXIFField }; longitude: { exif: EXIFField } };
} =>
protocol.metadata.includes(def.id) && def.infer !== undefined && 'exif' in def.infer
)
);
const images = await tables.Image.list('sessionId', sessionId).then((imgs) =>
imgs.filter((img) => img.fileId === imageFileId)
);
for (const { id: subjectId } of images) {
for (const { id: metadataId, infer, type } of metadataDefs) {
let value: RuntimeValue;
Iif ('latitude' in infer && 'longitude' in infer) {
const latitude = findRawMetadataFieldByExifTag(metadata, infer.latitude.exif);
const longitude = findRawMetadataFieldByExifTag(metadata, infer.longitude.exif);
// Skip if either latitude or longitude is missing
if (latitude === undefined || longitude === undefined) {
continue;
}
value = {
latitude: coerceExifValue(latitude, 'float'),
longitude: coerceExifValue(longitude, 'float'),
};
} else {
const rawValue = findRawMetadataFieldByExifTag(metadata, infer.exif);
// Skip if the raw metadata field is not present
Iif (rawValue === undefined) {
console.warn(
`EXIF tag ${infer.exif} not found in metadata for session ${sessionId}, subject ${subjectId}, skipping metadata ${metadataId}`
);
continue;
}
value = coerceExifValue(rawValue, type);
}
await storeMetadataValue({
db: await openDatabase(),
sessionId,
subjectId,
metadataId,
type,
value,
});
}
}
}
export function findRawMetadataFieldByExifTag(
metadata: import('libraw-wasm').Metadata,
tag: EXIFField
): number | string | Date | undefined {
switch (tag) {
case 'Make':
return metadata.camera_make;
case 'Model':
return metadata.camera_model;
case 'ISOSpeed':
return metadata.iso_speed;
case 'ShutterSpeedValue':
return metadata.shutter;
case 'ApertureValue':
return metadata.aperture;
case 'FocalLength':
return metadata.focal_len;
case 'DateTimeOriginal':
return metadata.timestamp;
// XXX: Not sure about that one
case 'ImageDescription':
return metadata.desc;
case 'Artist':
return metadata.artist;
case 'GPSAltitude':
return metadata.gps_data?.altitude;
// XXX: Find out if there's a way to get the LatitudeRef
case 'GPSLatitude': {
Iif (!metadata.gps_data) return undefined;
return GPSHelper.dmsRationalToDeg(
metadata.gps_data.latitude.map((v) => [v, 1] as const),
'N'
);
}
// XXX: Find out if there's a way to get the LongitudeRef
case 'GPSLongitude': {
Iif (!metadata.gps_data) return undefined;
return GPSHelper.dmsRationalToDeg(
metadata.gps_data.longitude.map((v) => [v, 1] as const),
'E'
);
}
case 'ExposureIndex':
return metadata.metadata_common?.exifExposureIndex;
case 'ColorSpace':
return metadata.metadata_common?.ColorSpace;
}
}
|