@infinito/id3/src/gen/id3.2.3.frame.js

ID3 Tag Reader/Writer

import {TextEncoder} from 'text-encoding';

import {constants} from '../constants.js';

export default function genID3v2_3Frame(frame_id,val) {
	val = new TextEncoder().encode(val);
	var sz = val.byteLength;
	sz++;
	var buf = new Uint8Array(10+sz);
	for(var i=0;i<frame_id.length;i++) {
		buf[i] = frame_id.charCodeAt(i);
	}
	for(var i=constants.ID3V2_3_FRAME_SIZE_BYTES-1;i>=0;i--) {
		buf[4+i] = sz&0xff;
		sz>>=8;
	}
	sz = val.byteLength;
	buf[8] = 0;
	buf[9] = 0;
	buf[10] = 1;//Encoding Byte
	for(var i=0;i<sz;i++) {
		buf[11+i] = val[i];
	}
	return buf;
};