SheWhoReignsSupreme/decord
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
decord/source/4753_isPngImageHeaderChunk.js
github-actions a46ceb57c3 chore: update source for alpha 340.6
2026-07-25 08:10:48 +00:00

289 lines
9.4 KiB
JavaScript
Raw Blame History

// Module ID: 4753
// Function ID: 41287
// Name: isPngImageHeaderChunk
// Dependencies: [4746, 4749]
// Module 4753 (isPngImageHeaderChunk)
const require = arg1;
const module = arg2;
const dependencyMap = arg6;
function isPngImageHeaderChunk(byteLength, length) {
return "IHDR" === require(4746) /* getStringFromDataView */.getStringFromDataView(byteLength, length + c7, c5);
}
function isPngXmpChunk(byteLength, length) {
let tmp = require(4746) /* getStringFromDataView */.getStringFromDataView(byteLength, length + c7, c5) === iTXt;
if (tmp) {
tmp = require(4746) /* getStringFromDataView */.getStringFromDataView(byteLength, length + c8, XMLcomadobexmp0.length) === XMLcomadobexmp0;
const obj2 = require(4746) /* getStringFromDataView */;
}
return tmp;
}
function isPngTextChunk(byteLength, length, arg2) {
const stringFromDataView = require(4746) /* getStringFromDataView */.getStringFromDataView(byteLength, length + c7, c5);
let tmp2 = stringFromDataView === tEXt;
if (!tmp2) {
tmp2 = stringFromDataView === iTXt;
}
if (!tmp2) {
tmp2 = stringFromDataView === zTXt && arg2;
const tmp5 = stringFromDataView === zTXt && arg2;
}
return tmp2;
}
function isPngExifChunk(byteLength, length) {
return require(4746) /* getStringFromDataView */.getStringFromDataView(byteLength, length + c7, c5) === eXIf;
}
function isPngIccpChunk(byteLength, length) {
return require(4746) /* getStringFromDataView */.getStringFromDataView(byteLength, length + c7, c5) === iCCP;
}
function isPngChunk(byteLength, length) {
const items = [pHYs, tIME];
return items.includes(require(4746) /* getStringFromDataView */.getStringFromDataView(byteLength, length + c7, c5));
}
function getPngXmpDataOffset(byteLength, length) {
const sum = length + (c8 + XMLcomadobexmp0.length + 1 + 1);
let tmp2 = sum;
let num = 0;
let tmp3 = sum;
let num2 = 0;
if (sum < byteLength.byteLength) {
while (true) {
let tmp4 = tmp2;
let sum1 = num;
if (0 === byteLength.getUint8(tmp2)) {
sum1 = num + 1;
}
let sum2 = tmp2 + 1;
tmp3 = sum2;
num2 = sum1;
if (sum1 >= 2) {
break;
} else {
tmp2 = sum2;
num = sum1;
num2 = sum1;
tmp3 = sum2;
if (sum2 >= byteLength.byteLength) {
break;
}
}
}
}
return num2 < 2 ? undefined : tmp3;
}
function parseIccHeader(getUint8, sum) {
let obj = require(4746) /* getStringFromDataView */;
const nullTerminatedStringFromDataView = obj.getNullTerminatedStringFromDataView(getUint8, sum);
sum = sum + (nullTerminatedStringFromDataView.length + 1);
obj = { profileName: nullTerminatedStringFromDataView, compressionMethod: getUint8.getUint8(sum), compressedProfileOffset: sum + 1 };
return obj;
}
let c3 = "\u0089PNG\r\n\u001A\n";
let c4 = 4;
let c5 = 4;
let c6 = 0;
let c7 = 4;
let c8 = 8;
let c9 = "XML:com.adobe.xmp\0";
const tEXt = "tEXt";
const iTXt = "iTXt";
const zTXt = "zTXt";
const pHYs = "pHYs";
const tIME = "tIME";
const eXIf = "eXIf";
const iCCP = "iCCP";
arg5.default = {
isPngFile(dataView) {
let tmp2 = !tmp;
if (!!dataView) {
tmp2 = require(4746) /* getStringFromDataView */.getStringFromDataView(dataView, 0, u0089PNGrnu001An.length) === u0089PNGrnu001An;
const obj = require(4746) /* getStringFromDataView */;
}
return tmp2;
},
findPngOffsets(byteLength, arg1) {
let compressedProfileOffset;
let compressionMethod;
let profileName;
let obj = { hasAppMarkers: false };
let length = u0089PNGrnu001An.length;
if (length + c4 + c5 <= byteLength.byteLength) {
while (true) {
let tmp8 = module;
let tmp9 = dependencyMap;
if (module(4749).USE_PNG_FILE) {
let tmp10 = isPngImageHeaderChunk;
if (isPngImageHeaderChunk(byteLength, length)) {
obj.hasAppMarkers = true;
let tmp47 = c8;
obj.pngHeaderOffset = length + c8;
let tmp20 = tmp;
let tmp21 = tmp2;
let tmp22 = tmp3;
let tmp23 = tmp4;
let tmp24 = tmp5;
let tmp25 = tmp6;
let tmp26 = tmp7;
let tmp48 = c6;
let tmp49 = c4;
let tmp50 = c5;
length = length + (byteLength.getUint32(length + c6) + c4 + c5 + 4);
let tmp51 = c4;
let tmp52 = c5;
tmp = tmp20;
tmp2 = tmp21;
tmp3 = tmp22;
tmp4 = tmp23;
tmp5 = tmp24;
tmp6 = tmp25;
tmp7 = tmp26;
if (length + c4 + c5 > byteLength.byteLength) {
break;
}
}
}
let tmp11 = module;
let tmp12 = dependencyMap;
if (module(4749).USE_XMP) {
let tmp13 = isPngXmpChunk;
if (isPngXmpChunk(byteLength, length)) {
let tmp45 = getPngXmpDataOffset;
let tmp46 = getPngXmpDataOffset(byteLength, length);
tmp21 = tmp2;
tmp22 = tmp3;
tmp23 = tmp4;
tmp24 = tmp5;
tmp25 = tmp6;
tmp26 = tmp7;
tmp20 = tmp46;
if (undefined !== tmp46) {
obj.hasAppMarkers = true;
obj = { dataOffset: tmp46 };
let tmp53 = c6;
let tmp54 = c8;
obj.length = byteLength.getUint32(length + c6) - (tmp46 - (length + c8));
let items = [obj];
obj.xmpChunks = items;
tmp20 = tmp46;
tmp21 = tmp2;
tmp22 = tmp3;
tmp23 = tmp4;
tmp24 = tmp5;
tmp25 = tmp6;
tmp26 = tmp7;
}
}
}
let tmp14 = isPngTextChunk;
if (isPngTextChunk(byteLength, length, arg1)) {
obj.hasAppMarkers = true;
let tmp37 = require;
let tmp38 = dependencyMap;
let obj3 = require(4746) /* getStringFromDataView */;
let tmp39 = c7;
let tmp40 = c5;
let stringFromDataView = obj3.getStringFromDataView(byteLength, length + c7, c5);
if (!obj.pngTextChunks) {
obj.pngTextChunks = [];
}
let pngTextChunks = obj.pngTextChunks;
obj = {};
let tmp42 = c6;
obj.length = byteLength.getUint32(length + c6);
obj.type = stringFromDataView;
let tmp43 = c8;
obj.offset = length + c8;
let arr = pngTextChunks.push(obj);
tmp20 = tmp;
tmp21 = stringFromDataView;
tmp22 = tmp3;
tmp23 = tmp4;
tmp24 = tmp5;
tmp25 = tmp6;
tmp26 = tmp7;
} else {
let tmp15 = isPngExifChunk;
if (isPngExifChunk(byteLength, length)) {
obj.hasAppMarkers = true;
let tmp36 = c8;
obj.tiffHeaderOffset = length + c8;
tmp20 = tmp;
tmp21 = tmp2;
tmp22 = tmp3;
tmp23 = tmp4;
tmp24 = tmp5;
tmp25 = tmp6;
tmp26 = tmp7;
} else {
let tmp16 = module;
let tmp17 = dependencyMap;
if (module(4749).USE_ICC) {
if (arg1) {
let tmp18 = isPngIccpChunk;
if (isPngIccpChunk(byteLength, length)) {
obj.hasAppMarkers = true;
let tmp29 = c6;
let uint32 = byteLength.getUint32(length + c6);
let tmp31 = c8;
let sum = length + c8;
let tmp33 = parseIccHeader;
let tmp34 = parseIccHeader(byteLength, sum);
({ profileName, compressionMethod, compressedProfileOffset } = tmp34);
if (!obj.iccChunks) {
obj.iccChunks = [];
}
let iccChunks = obj.iccChunks;
let obj1 = { offset: compressedProfileOffset, length: uint32 - (compressedProfileOffset - sum), chunkNumber: 1, chunksTotal: 1, profileName, compressionMethod };
arr = iccChunks.push(obj1);
tmp20 = tmp;
tmp21 = tmp2;
tmp22 = uint32;
tmp23 = sum;
tmp24 = profileName;
tmp25 = compressionMethod;
tmp26 = compressedProfileOffset;
}
}
}
let tmp19 = isPngChunk;
tmp20 = tmp;
tmp21 = tmp2;
tmp22 = tmp3;
tmp23 = tmp4;
tmp24 = tmp5;
tmp25 = tmp6;
tmp26 = tmp7;
if (isPngChunk(byteLength, length)) {
obj.hasAppMarkers = true;
if (!obj.pngChunkOffsets) {
obj.pngChunkOffsets = [];
}
let pngChunkOffsets = obj.pngChunkOffsets;
let tmp27 = c6;
let arr1 = pngChunkOffsets.push(length + c6);
tmp20 = tmp;
tmp21 = tmp2;
tmp22 = tmp3;
tmp23 = tmp4;
tmp24 = tmp5;
tmp25 = tmp6;
tmp26 = tmp7;
}
}
}
}
}
return obj;
}
};
arg5.PNG_CHUNK_TYPE_SIZE = 4;
arg5.PNG_CHUNK_LENGTH_OFFSET = 0;
arg5.PNG_CHUNK_TYPE_OFFSET = 4;
arg5.PNG_CHUNK_DATA_OFFSET = 8;
arg5.TYPE_TEXT = "tEXt";
arg5.TYPE_ITXT = "iTXt";
arg5.TYPE_ZTXT = "zTXt";
arg5.TYPE_PHYS = "pHYs";
arg5.TYPE_TIME = "tIME";
arg5.TYPE_EXIF = "eXIf";
arg5.TYPE_ICCP = "iCCP";
Reference in a new issue View git blame Copy permalink