securityos/node_modules/music-metadata/lib/asf/AsfObject.js

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2024-09-06 15:32:35 +00:00
"use strict";
// ASF Objects
Object.defineProperty(exports, "__esModule", { value: true });
exports.WmPictureToken = exports.MetadataLibraryObjectState = exports.MetadataObjectState = exports.ExtendedStreamPropertiesObjectState = exports.ExtendedContentDescriptionObjectState = exports.ContentDescriptionObjectState = exports.readCodecEntries = exports.HeaderExtensionObject = exports.StreamPropertiesObject = exports.FilePropertiesObject = exports.IgnoreObjectState = exports.State = exports.HeaderObjectToken = exports.TopLevelHeaderObjectToken = exports.DataType = void 0;
const util = require("../common/Util");
const Token = require("token-types");
const GUID_1 = require("./GUID");
const AsfUtil_1 = require("./AsfUtil");
const ID3v2Token_1 = require("../id3v2/ID3v2Token");
/**
* Data Type: Specifies the type of information being stored. The following values are recognized.
*/
var DataType;
(function (DataType) {
/**
* Unicode string. The data consists of a sequence of Unicode characters.
*/
DataType[DataType["UnicodeString"] = 0] = "UnicodeString";
/**
* BYTE array. The type of data is implementation-specific.
*/
DataType[DataType["ByteArray"] = 1] = "ByteArray";
/**
* BOOL. The data is 2 bytes long and should be interpreted as a 16-bit unsigned integer. Only 0x0000 or 0x0001 are permitted values.
*/
DataType[DataType["Bool"] = 2] = "Bool";
/**
* DWORD. The data is 4 bytes long and should be interpreted as a 32-bit unsigned integer.
*/
DataType[DataType["DWord"] = 3] = "DWord";
/**
* QWORD. The data is 8 bytes long and should be interpreted as a 64-bit unsigned integer.
*/
DataType[DataType["QWord"] = 4] = "QWord";
/**
* WORD. The data is 2 bytes long and should be interpreted as a 16-bit unsigned integer.
*/
DataType[DataType["Word"] = 5] = "Word";
})(DataType = exports.DataType || (exports.DataType = {}));
/**
* Token for: 3. ASF top-level Header Object
* Ref: http://drang.s4.xrea.com/program/tips/id3tag/wmp/03_asf_top_level_header_object.html#3
*/
exports.TopLevelHeaderObjectToken = {
len: 30,
get: (buf, off) => {
return {
objectId: GUID_1.default.fromBin(new Token.BufferType(16).get(buf, off)),
objectSize: Number(Token.UINT64_LE.get(buf, off + 16)),
numberOfHeaderObjects: Token.UINT32_LE.get(buf, off + 24)
// Reserved: 2 bytes
};
}
};
/**
* Token for: 3.1 Header Object (mandatory, one only)
* Ref: http://drang.s4.xrea.com/program/tips/id3tag/wmp/03_asf_top_level_header_object.html#3_1
*/
exports.HeaderObjectToken = {
len: 24,
get: (buf, off) => {
return {
objectId: GUID_1.default.fromBin(new Token.BufferType(16).get(buf, off)),
objectSize: Number(Token.UINT64_LE.get(buf, off + 16))
};
}
};
class State {
constructor(header) {
this.len = Number(header.objectSize) - exports.HeaderObjectToken.len;
}
postProcessTag(tags, name, valueType, data) {
if (name === 'WM/Picture') {
tags.push({ id: name, value: WmPictureToken.fromBuffer(data) });
}
else {
const parseAttr = AsfUtil_1.AsfUtil.getParserForAttr(valueType);
if (!parseAttr) {
throw new Error('unexpected value headerType: ' + valueType);
}
tags.push({ id: name, value: parseAttr(data) });
}
}
}
exports.State = State;
// ToDo: use ignore type
class IgnoreObjectState extends State {
constructor(header) {
super(header);
}
get(buf, off) {
return null;
}
}
exports.IgnoreObjectState = IgnoreObjectState;
/**
* Token for: 3.2: File Properties Object (mandatory, one only)
* Ref: http://drang.s4.xrea.com/program/tips/id3tag/wmp/03_asf_top_level_header_object.html#3_2
*/
class FilePropertiesObject extends State {
constructor(header) {
super(header);
}
get(buf, off) {
return {
fileId: GUID_1.default.fromBin(buf, off),
fileSize: Token.UINT64_LE.get(buf, off + 16),
creationDate: Token.UINT64_LE.get(buf, off + 24),
dataPacketsCount: Token.UINT64_LE.get(buf, off + 32),
playDuration: Token.UINT64_LE.get(buf, off + 40),
sendDuration: Token.UINT64_LE.get(buf, off + 48),
preroll: Token.UINT64_LE.get(buf, off + 56),
flags: {
broadcast: util.getBit(buf, off + 64, 24),
seekable: util.getBit(buf, off + 64, 25)
},
// flagsNumeric: Token.UINT32_LE.get(buf, off + 64),
minimumDataPacketSize: Token.UINT32_LE.get(buf, off + 68),
maximumDataPacketSize: Token.UINT32_LE.get(buf, off + 72),
maximumBitrate: Token.UINT32_LE.get(buf, off + 76)
};
}
}
FilePropertiesObject.guid = GUID_1.default.FilePropertiesObject;
exports.FilePropertiesObject = FilePropertiesObject;
/**
* Token for: 3.3 Stream Properties Object (mandatory, one per stream)
* Ref: http://drang.s4.xrea.com/program/tips/id3tag/wmp/03_asf_top_level_header_object.html#3_3
*/
class StreamPropertiesObject extends State {
constructor(header) {
super(header);
}
get(buf, off) {
return {
streamType: GUID_1.default.decodeMediaType(GUID_1.default.fromBin(buf, off)),
errorCorrectionType: GUID_1.default.fromBin(buf, off + 8)
// ToDo
};
}
}
StreamPropertiesObject.guid = GUID_1.default.StreamPropertiesObject;
exports.StreamPropertiesObject = StreamPropertiesObject;
/**
* 3.4: Header Extension Object (mandatory, one only)
* Ref: http://drang.s4.xrea.com/program/tips/id3tag/wmp/03_asf_top_level_header_object.html#3_4
*/
class HeaderExtensionObject {
constructor() {
this.len = 22;
}
get(buf, off) {
return {
reserved1: GUID_1.default.fromBin(buf, off),
reserved2: buf.readUInt16LE(off + 16),
extensionDataSize: buf.readUInt32LE(off + 18)
};
}
}
HeaderExtensionObject.guid = GUID_1.default.HeaderExtensionObject;
exports.HeaderExtensionObject = HeaderExtensionObject;
/**
* 3.5: The Codec List Object provides user-friendly information about the codecs and formats used to encode the content found in the ASF file.
* Ref: http://drang.s4.xrea.com/program/tips/id3tag/wmp/03_asf_top_level_header_object.html#3_5
*/
const CodecListObjectHeader = {
len: 20,
get: (buf, off) => {
return {
entryCount: buf.readUInt16LE(off + 16)
};
}
};
async function readString(tokenizer) {
const length = await tokenizer.readNumber(Token.UINT16_LE);
return (await tokenizer.readToken(new Token.StringType(length * 2, 'utf16le'))).replace('\0', '');
}
/**
* 3.5: Read the Codec-List-Object, which provides user-friendly information about the codecs and formats used to encode the content found in the ASF file.
* Ref: http://drang.s4.xrea.com/program/tips/id3tag/wmp/03_asf_top_level_header_object.html#3_5
*/
async function readCodecEntries(tokenizer) {
const codecHeader = await tokenizer.readToken(CodecListObjectHeader);
const entries = [];
for (let i = 0; i < codecHeader.entryCount; ++i) {
entries.push(await readCodecEntry(tokenizer));
}
return entries;
}
exports.readCodecEntries = readCodecEntries;
async function readInformation(tokenizer) {
const length = await tokenizer.readNumber(Token.UINT16_LE);
const buf = Buffer.alloc(length);
await tokenizer.readBuffer(buf);
return buf;
}
/**
* Read Codec-Entries
* @param tokenizer
*/
async function readCodecEntry(tokenizer) {
const type = await tokenizer.readNumber(Token.UINT16_LE);
return {
type: {
videoCodec: (type & 0x0001) === 0x0001,
audioCodec: (type & 0x0002) === 0x0002
},
codecName: await readString(tokenizer),
description: await readString(tokenizer),
information: await readInformation(tokenizer)
};
}
/**
* 3.10 Content Description Object (optional, one only)
* Ref: http://drang.s4.xrea.com/program/tips/id3tag/wmp/03_asf_top_level_header_object.html#3_10
*/
class ContentDescriptionObjectState extends State {
constructor(header) {
super(header);
}
get(buf, off) {
const tags = [];
let pos = off + 10;
for (let i = 0; i < ContentDescriptionObjectState.contentDescTags.length; ++i) {
const length = buf.readUInt16LE(off + i * 2);
if (length > 0) {
const tagName = ContentDescriptionObjectState.contentDescTags[i];
const end = pos + length;
tags.push({ id: tagName, value: AsfUtil_1.AsfUtil.parseUnicodeAttr(buf.slice(pos, end)) });
pos = end;
}
}
return tags;
}
}
ContentDescriptionObjectState.guid = GUID_1.default.ContentDescriptionObject;
ContentDescriptionObjectState.contentDescTags = ['Title', 'Author', 'Copyright', 'Description', 'Rating'];
exports.ContentDescriptionObjectState = ContentDescriptionObjectState;
/**
* 3.11 Extended Content Description Object (optional, one only)
* Ref: http://drang.s4.xrea.com/program/tips/id3tag/wmp/03_asf_top_level_header_object.html#3_11
*/
class ExtendedContentDescriptionObjectState extends State {
constructor(header) {
super(header);
}
get(buf, off) {
const tags = [];
const attrCount = buf.readUInt16LE(off);
let pos = off + 2;
for (let i = 0; i < attrCount; i += 1) {
const nameLen = buf.readUInt16LE(pos);
pos += 2;
const name = AsfUtil_1.AsfUtil.parseUnicodeAttr(buf.slice(pos, pos + nameLen));
pos += nameLen;
const valueType = buf.readUInt16LE(pos);
pos += 2;
const valueLen = buf.readUInt16LE(pos);
pos += 2;
const value = buf.slice(pos, pos + valueLen);
pos += valueLen;
this.postProcessTag(tags, name, valueType, value);
}
return tags;
}
}
ExtendedContentDescriptionObjectState.guid = GUID_1.default.ExtendedContentDescriptionObject;
exports.ExtendedContentDescriptionObjectState = ExtendedContentDescriptionObjectState;
/**
* 4.1 Extended Stream Properties Object (optional, 1 per media stream)
* Ref: http://drang.s4.xrea.com/program/tips/id3tag/wmp/04_objects_in_the_asf_header_extension_object.html#4_1
*/
class ExtendedStreamPropertiesObjectState extends State {
constructor(header) {
super(header);
}
get(buf, off) {
return {
startTime: Token.UINT64_LE.get(buf, off),
endTime: Token.UINT64_LE.get(buf, off + 8),
dataBitrate: buf.readInt32LE(off + 12),
bufferSize: buf.readInt32LE(off + 16),
initialBufferFullness: buf.readInt32LE(off + 20),
alternateDataBitrate: buf.readInt32LE(off + 24),
alternateBufferSize: buf.readInt32LE(off + 28),
alternateInitialBufferFullness: buf.readInt32LE(off + 32),
maximumObjectSize: buf.readInt32LE(off + 36),
flags: {
reliableFlag: util.getBit(buf, off + 40, 0),
seekableFlag: util.getBit(buf, off + 40, 1),
resendLiveCleanpointsFlag: util.getBit(buf, off + 40, 2)
},
// flagsNumeric: Token.UINT32_LE.get(buf, off + 64),
streamNumber: buf.readInt16LE(off + 42),
streamLanguageId: buf.readInt16LE(off + 44),
averageTimePerFrame: buf.readInt32LE(off + 52),
streamNameCount: buf.readInt32LE(off + 54),
payloadExtensionSystems: buf.readInt32LE(off + 56),
streamNames: [],
streamPropertiesObject: null
};
}
}
ExtendedStreamPropertiesObjectState.guid = GUID_1.default.ExtendedStreamPropertiesObject;
exports.ExtendedStreamPropertiesObjectState = ExtendedStreamPropertiesObjectState;
/**
* 4.7 Metadata Object (optional, 0 or 1)
* Ref: http://drang.s4.xrea.com/program/tips/id3tag/wmp/04_objects_in_the_asf_header_extension_object.html#4_7
*/
class MetadataObjectState extends State {
constructor(header) {
super(header);
}
get(uint8Array, off) {
const tags = [];
const buf = Buffer.from(uint8Array);
const descriptionRecordsCount = buf.readUInt16LE(off);
let pos = off + 2;
for (let i = 0; i < descriptionRecordsCount; i += 1) {
pos += 4;
const nameLen = buf.readUInt16LE(pos);
pos += 2;
const dataType = buf.readUInt16LE(pos);
pos += 2;
const dataLen = buf.readUInt32LE(pos);
pos += 4;
const name = AsfUtil_1.AsfUtil.parseUnicodeAttr(buf.slice(pos, pos + nameLen));
pos += nameLen;
const data = buf.slice(pos, pos + dataLen);
pos += dataLen;
this.postProcessTag(tags, name, dataType, data);
}
return tags;
}
}
MetadataObjectState.guid = GUID_1.default.MetadataObject;
exports.MetadataObjectState = MetadataObjectState;
// 4.8 Metadata Library Object (optional, 0 or 1)
class MetadataLibraryObjectState extends MetadataObjectState {
constructor(header) {
super(header);
}
}
MetadataLibraryObjectState.guid = GUID_1.default.MetadataLibraryObject;
exports.MetadataLibraryObjectState = MetadataLibraryObjectState;
/**
* Ref: https://msdn.microsoft.com/en-us/library/windows/desktop/dd757977(v=vs.85).aspx
*/
class WmPictureToken {
static fromBase64(base64str) {
return this.fromBuffer(Buffer.from(base64str, 'base64'));
}
static fromBuffer(buffer) {
const pic = new WmPictureToken(buffer.length);
return pic.get(buffer, 0);
}
constructor(len) {
this.len = len;
}
get(buffer, offset) {
const typeId = buffer.readUInt8(offset++);
const size = buffer.readInt32LE(offset);
let index = 5;
while (buffer.readUInt16BE(index) !== 0) {
index += 2;
}
const format = buffer.slice(5, index).toString('utf16le');
while (buffer.readUInt16BE(index) !== 0) {
index += 2;
}
const description = buffer.slice(5, index).toString('utf16le');
return {
type: ID3v2Token_1.AttachedPictureType[typeId],
format,
description,
size,
data: buffer.slice(index + 4)
};
}
}
exports.WmPictureToken = WmPictureToken;