107 lines
4.7 KiB
JavaScript
107 lines
4.7 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.TextEncodingToken = exports.ExtendedHeader = exports.ID3v2Header = exports.UINT32SYNCSAFE = exports.AttachedPictureType = void 0;
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const Token = require("token-types");
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const util = require("../common/Util");
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/**
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* The picture type according to the ID3v2 APIC frame
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* Ref: http://id3.org/id3v2.3.0#Attached_picture
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*/
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var AttachedPictureType;
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(function (AttachedPictureType) {
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AttachedPictureType[AttachedPictureType["Other"] = 0] = "Other";
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AttachedPictureType[AttachedPictureType["32x32 pixels 'file icon' (PNG only)"] = 1] = "32x32 pixels 'file icon' (PNG only)";
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AttachedPictureType[AttachedPictureType["Other file icon"] = 2] = "Other file icon";
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AttachedPictureType[AttachedPictureType["Cover (front)"] = 3] = "Cover (front)";
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AttachedPictureType[AttachedPictureType["Cover (back)"] = 4] = "Cover (back)";
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AttachedPictureType[AttachedPictureType["Leaflet page"] = 5] = "Leaflet page";
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AttachedPictureType[AttachedPictureType["Media (e.g. label side of CD)"] = 6] = "Media (e.g. label side of CD)";
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AttachedPictureType[AttachedPictureType["Lead artist/lead performer/soloist"] = 7] = "Lead artist/lead performer/soloist";
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AttachedPictureType[AttachedPictureType["Artist/performer"] = 8] = "Artist/performer";
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AttachedPictureType[AttachedPictureType["Conductor"] = 9] = "Conductor";
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AttachedPictureType[AttachedPictureType["Band/Orchestra"] = 10] = "Band/Orchestra";
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AttachedPictureType[AttachedPictureType["Composer"] = 11] = "Composer";
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AttachedPictureType[AttachedPictureType["Lyricist/text writer"] = 12] = "Lyricist/text writer";
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AttachedPictureType[AttachedPictureType["Recording Location"] = 13] = "Recording Location";
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AttachedPictureType[AttachedPictureType["During recording"] = 14] = "During recording";
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AttachedPictureType[AttachedPictureType["During performance"] = 15] = "During performance";
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AttachedPictureType[AttachedPictureType["Movie/video screen capture"] = 16] = "Movie/video screen capture";
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AttachedPictureType[AttachedPictureType["A bright coloured fish"] = 17] = "A bright coloured fish";
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AttachedPictureType[AttachedPictureType["Illustration"] = 18] = "Illustration";
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AttachedPictureType[AttachedPictureType["Band/artist logotype"] = 19] = "Band/artist logotype";
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AttachedPictureType[AttachedPictureType["Publisher/Studio logotype"] = 20] = "Publisher/Studio logotype";
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})(AttachedPictureType = exports.AttachedPictureType || (exports.AttachedPictureType = {}));
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/**
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* 28 bits (representing up to 256MB) integer, the msb is 0 to avoid 'false syncsignals'.
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* 4 * %0xxxxxxx
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*/
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exports.UINT32SYNCSAFE = {
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get: (buf, off) => {
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return buf[off + 3] & 0x7f | ((buf[off + 2]) << 7) |
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((buf[off + 1]) << 14) | ((buf[off]) << 21);
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},
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len: 4
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};
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/**
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* ID3v2 header
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* Ref: http://id3.org/id3v2.3.0#ID3v2_header
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* ToDo
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*/
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exports.ID3v2Header = {
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len: 10,
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get: (buf, off) => {
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return {
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// ID3v2/file identifier "ID3"
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fileIdentifier: new Token.StringType(3, 'ascii').get(buf, off),
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// ID3v2 versionIndex
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version: {
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major: Token.INT8.get(buf, off + 3),
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revision: Token.INT8.get(buf, off + 4)
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},
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// ID3v2 flags
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flags: {
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// Unsynchronisation
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unsynchronisation: util.getBit(buf, off + 5, 7),
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// Extended header
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isExtendedHeader: util.getBit(buf, off + 5, 6),
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// Experimental indicator
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expIndicator: util.getBit(buf, off + 5, 5),
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footer: util.getBit(buf, off + 5, 4)
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},
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size: exports.UINT32SYNCSAFE.get(buf, off + 6)
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};
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}
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};
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exports.ExtendedHeader = {
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len: 10,
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get: (buf, off) => {
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return {
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// Extended header size
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size: Token.UINT32_BE.get(buf, off),
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// Extended Flags
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extendedFlags: Token.UINT16_BE.get(buf, off + 4),
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// Size of padding
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sizeOfPadding: Token.UINT32_BE.get(buf, off + 6),
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// CRC data present
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crcDataPresent: util.getBit(buf, off + 4, 31)
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};
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}
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};
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exports.TextEncodingToken = {
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len: 1,
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get: (uint8Array, off) => {
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switch (uint8Array[off]) {
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case 0x00:
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return { encoding: 'latin1' }; // binary
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case 0x01:
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return { encoding: 'utf16le', bom: true };
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case 0x02:
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return { encoding: 'utf16le', bom: false };
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case 0x03:
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return { encoding: 'utf8', bom: false };
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default:
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return { encoding: 'utf8', bom: false };
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}
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}
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};
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