You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
41 lines
1.5 KiB
JavaScript
41 lines
1.5 KiB
JavaScript
2 years ago
|
importScripts('libmp3lame.min.js');
|
||
|
|
|
||
|
|
var mp3codec;
|
||
|
|
|
||
|
|
this.addEventListener('message', function(e) {
|
||
|
|
switch (e.data.cmd) {
|
||
|
|
case 'init':
|
||
|
|
if (!e.data.config) {
|
||
|
|
e.data.config = { };
|
||
|
|
}
|
||
|
|
mp3codec = Lame.init();
|
||
|
|
|
||
|
|
Lame.set_mode(mp3codec, e.data.config.mode || Lame.JOINT_STEREO);
|
||
|
|
Lame.set_num_channels(mp3codec, e.data.config.channels || 2);
|
||
|
|
Lame.set_num_samples(mp3codec, e.data.config.samples || -1);
|
||
|
|
Lame.set_in_samplerate(mp3codec, e.data.config.samplerate || 44100);
|
||
|
|
Lame.set_out_samplerate(mp3codec, e.data.config.samplerate || 44100);
|
||
|
|
Lame.set_bitrate(mp3codec, e.data.config.bitrate || 128);
|
||
|
|
|
||
|
|
Lame.init_params(mp3codec);
|
||
|
|
// console.log('Version :', Lame.get_version() + ' / ',
|
||
|
|
// 'Mode: '+Lame.get_mode(mp3codec) + ' / ',
|
||
|
|
// 'Samples: '+Lame.get_num_samples(mp3codec) + ' / ',
|
||
|
|
// 'Channels: '+Lame.get_num_channels(mp3codec) + ' / ',
|
||
|
|
// 'Input Samplate: '+ Lame.get_in_samplerate(mp3codec) + ' / ',
|
||
|
|
// 'Output Samplate: '+ Lame.get_in_samplerate(mp3codec) + ' / ',
|
||
|
|
// 'Bitlate :' +Lame.get_bitrate(mp3codec) + ' / ');
|
||
|
|
// 'VBR :' + Lame.get_VBR(mp3codec));
|
||
|
|
break;
|
||
|
|
case 'encode':
|
||
|
|
var mp3data = Lame.encode_buffer_ieee_float(mp3codec, e.data.buf, e.data.buf);
|
||
|
|
self.postMessage({cmd: 'data', buffer: mp3data.data});
|
||
|
|
break;
|
||
|
|
case 'finish':
|
||
|
|
var mp3data = Lame.encode_flush(mp3codec);
|
||
|
|
self.postMessage({cmd: 'end', buffer: mp3data.data});
|
||
|
|
Lame.close(mp3codec);
|
||
|
|
mp3codec = null;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
});
|