29 lines
876 B
JavaScript
29 lines
876 B
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.IdHeader = void 0;
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const Token = require("token-types");
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/**
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* Opus ID Header parser
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* Ref: https://wiki.xiph.org/OggOpus#ID_Header
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*/
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class IdHeader {
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constructor(len) {
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this.len = len;
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if (len < 19) {
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throw new Error("ID-header-page 0 should be at least 19 bytes long");
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}
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}
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get(buf, off) {
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return {
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magicSignature: new Token.StringType(8, 'ascii').get(buf, off + 0),
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version: buf.readUInt8(off + 8),
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channelCount: buf.readUInt8(off + 9),
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preSkip: buf.readInt16LE(off + 10),
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inputSampleRate: buf.readInt32LE(off + 12),
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outputGain: buf.readInt16LE(off + 16),
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channelMapping: buf.readUInt8(off + 18)
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};
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}
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}
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exports.IdHeader = IdHeader;
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