@remotion/media-parser
Version:
A pure JavaScript library for parsing video files
124 lines (123 loc) • 4.14 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.parseIccProfile = void 0;
const buffer_iterator_1 = require("../../iterator/buffer-iterator");
const parseIccProfile = (data) => {
const iterator = (0, buffer_iterator_1.getArrayBufferIterator)({
initialData: data,
maxBytes: data.length,
logLevel: 'error',
});
const size = iterator.getUint32();
if (size !== data.length) {
throw new Error('Invalid ICC profile size');
}
const preferredCMMType = iterator.getByteString(4, false);
const profileVersion = iterator.getByteString(4, false);
const profileDeviceClass = iterator.getByteString(4, false);
const colorSpace = iterator.getByteString(4, false);
const pcs = iterator.getByteString(4, false);
const dateTime = iterator.getSlice(12);
const signature = iterator.getByteString(4, false);
if (signature !== 'acsp') {
throw new Error('Invalid ICC profile signature');
}
const primaryPlatform = iterator.getByteString(4, false);
const profileFlags = iterator.getUint32();
const deviceManufacturer = iterator.getByteString(4, false);
const deviceModel = iterator.getByteString(4, false);
const deviceAttributes = iterator.getUint64();
const renderingIntent = iterator.getUint32();
const pcsIlluminant1 = iterator.getUint32();
const pcsIlluminant2 = iterator.getUint32();
const pcsIlluminant3 = iterator.getUint32();
const profileCreator = iterator.getByteString(4, false);
const profileId = iterator.getByteString(16, false);
// reserved
iterator.discard(28);
const tagCount = iterator.getUint32();
const entries = [];
for (let i = 0; i < tagCount; i++) {
const entry = {
tag: iterator.getByteString(4, false),
offset: iterator.getUint32(),
size: iterator.getUint32(),
};
entries.push(entry);
}
let lastOffset = -1;
let rXYZ = null;
let gXYZ = null;
let bXYZ = null;
let whitePoint = null;
for (const entry of entries) {
const found = data.slice(entry.offset, entry.offset + entry.size);
if (entry.tag === 'rXYZ' ||
entry.tag === 'gXYZ' ||
entry.tag === 'bXYZ' ||
entry.tag === 'wtpt') {
const it = (0, buffer_iterator_1.getArrayBufferIterator)({
initialData: found,
maxBytes: found.length,
logLevel: 'error',
});
it.discard(4);
const x = it.getInt32() / 65536;
const y = it.getInt32() / 65536;
const z = it.getInt32() / 65536;
it.destroy();
const point = { x, y, z };
if (entry.tag === 'rXYZ') {
rXYZ = point;
}
else if (entry.tag === 'gXYZ') {
gXYZ = point;
}
else if (entry.tag === 'bXYZ') {
bXYZ = point;
}
else if (entry.tag === 'wtpt') {
whitePoint = point;
}
}
if (lastOffset !== -1) {
const bytesToAdvance = entry.offset - lastOffset;
const bytesToGoBackwards = entry.size - bytesToAdvance;
if (bytesToGoBackwards > 0) {
iterator.counter.decrement(bytesToGoBackwards);
}
}
lastOffset = entry.offset;
}
const profile = {
size,
preferredCMMType,
profileVersion,
profileDeviceClass,
colorSpace,
pcs,
dateTime,
signature,
primaryPlatform,
profileFlags,
deviceManufacturer,
deviceModel,
deviceAttributes,
renderingIntent,
pcsIlluminant: [
pcsIlluminant1 / 65536,
pcsIlluminant2 / 65536,
pcsIlluminant3 / 65536,
],
profileCreator,
profileId,
entries,
bXYZ,
gXYZ,
rXYZ,
whitePoint,
};
iterator.destroy();
return profile;
};
exports.parseIccProfile = parseIccProfile;