music-metadata
Version:
Music metadata parser for Node.js, supporting virtual any audio and tag format.
32 lines • 1.13 kB
JavaScript
import initDebug from 'debug';
import { VorbisParser } from '../vorbis/VorbisParser.js';
import * as Speex from './Speex.js';
const debug = initDebug('music-metadata:parser:ogg:speex');
/**
* Speex, RFC 5574
* Ref:
* - https://www.speex.org/docs/manual/speex-manual/
* - https://tools.ietf.org/html/rfc5574
*/
export class SpeexParser extends VorbisParser {
constructor(metadata, options, tokenizer) {
super(metadata, options);
this.tokenizer = tokenizer;
}
/**
* Parse first Speex Ogg page
* @param {IPageHeader} header
* @param {Uint8Array} pageData
*/
parseFirstPage(header, pageData) {
debug('First Ogg/Speex page');
const speexHeader = Speex.Header.get(pageData, 0);
this.metadata.setFormat('codec', `Speex ${speexHeader.version}`);
this.metadata.setFormat('numberOfChannels', speexHeader.nb_channels);
this.metadata.setFormat('sampleRate', speexHeader.rate);
if (speexHeader.bitrate !== -1) {
this.metadata.setFormat('bitrate', speexHeader.bitrate);
}
}
}
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