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41 lines
1.5 KiB
JavaScript
41 lines
1.5 KiB
JavaScript
importScripts('libmp3lame.min.js');
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var mp3codec;
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this.addEventListener('message', function(e) {
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switch (e.data.cmd) {
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case 'init':
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if (!e.data.config) {
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e.data.config = { };
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}
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mp3codec = Lame.init();
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Lame.set_mode(mp3codec, e.data.config.mode || Lame.JOINT_STEREO);
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Lame.set_num_channels(mp3codec, e.data.config.channels || 2);
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Lame.set_num_samples(mp3codec, e.data.config.samples || -1);
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Lame.set_in_samplerate(mp3codec, e.data.config.samplerate || 44100);
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Lame.set_out_samplerate(mp3codec, e.data.config.samplerate || 44100);
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Lame.set_bitrate(mp3codec, e.data.config.bitrate || 128);
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Lame.init_params(mp3codec);
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// console.log('Version :', Lame.get_version() + ' / ',
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// 'Mode: '+Lame.get_mode(mp3codec) + ' / ',
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// 'Samples: '+Lame.get_num_samples(mp3codec) + ' / ',
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// 'Channels: '+Lame.get_num_channels(mp3codec) + ' / ',
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// 'Input Samplate: '+ Lame.get_in_samplerate(mp3codec) + ' / ',
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// 'Output Samplate: '+ Lame.get_in_samplerate(mp3codec) + ' / ',
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// 'Bitlate :' +Lame.get_bitrate(mp3codec) + ' / ');
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// 'VBR :' + Lame.get_VBR(mp3codec));
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break;
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case 'encode':
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var mp3data = Lame.encode_buffer_ieee_float(mp3codec, e.data.buf, e.data.buf);
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self.postMessage({cmd: 'data', buffer: mp3data.data});
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break;
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case 'finish':
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var mp3data = Lame.encode_flush(mp3codec);
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self.postMessage({cmd: 'end', buffer: mp3data.data});
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Lame.close(mp3codec);
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mp3codec = null;
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break;
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}
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}); |