Borewit
66 lines
1.7 KiB
TypeScript
66 lines
1.7 KiB
TypeScript
import * as Token from 'token-types';
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import { IGetToken } from 'strtok3/core';
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import * as util from '../../common/Util.js';
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/**
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* Speex Header Packet
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* Ref: https://www.speex.org/docs/manual/speex-manual/node8.html#SECTION00830000000000000000
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*/
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export interface IHeader {
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/**
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* speex_string, char[] 8
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*/
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speex: string,
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/**
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* speex_version, char[] 20
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*/
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version: string,
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/**
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* Version id
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*/
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version_id: number,
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header_size: number,
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rate: number,
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mode: number,
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mode_bitstream_version: number,
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nb_channels: number,
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bitrate: number,
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frame_size: number,
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vbr: number,
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frames_per_packet: number,
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extra_headers: number,
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reserved1: number,
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reserved2: number
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}
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/**
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* Speex Header Packet
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* Ref: https://www.speex.org/docs/manual/speex-manual/node8.html#SECTION00830000000000000000
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*/
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export const Header: IGetToken<IHeader> = {
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len: 80,
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get: (buf: Buffer, off) => {
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return {
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speex: new Token.StringType(8, 'ascii').get(buf, off + 0),
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version: util.trimRightNull(new Token.StringType(20, 'ascii').get(buf, off + 8)),
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version_id: buf.readInt32LE(off + 28),
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header_size: buf.readInt32LE(off + 32),
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rate: buf.readInt32LE(off + 36),
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mode: buf.readInt32LE(off + 40),
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mode_bitstream_version: buf.readInt32LE(off + 44),
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nb_channels: buf.readInt32LE(off + 48),
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bitrate: buf.readInt32LE(off + 52),
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frame_size: buf.readInt32LE(off + 56),
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vbr: buf.readInt32LE(off + 60),
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frames_per_packet: buf.readInt32LE(off + 64),
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extra_headers: buf.readInt32LE(off + 68),
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reserved1: buf.readInt32LE(off + 72),
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reserved2: buf.readInt32LE(off + 76)
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};
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}
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};
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