<script src="recorder.js"></script>

const audioContext = new (window.AudioContext || window.webkitAudioContext)();

navigator.mediaDevices.getUserMedia({ audio: true }).then(function(stream) {
  // 使用流进行后续处理
});

const recorder = new Recorder(audioContext, { numChannels: 1 });
recorder.init(stream);

recorder.record();

recorder.stop();

recorder.exportWAV(function(blob) {
  // 在这里对WAV文件进行处理或下载
});

const encoder = new lamejs.Mp3Encoder(1, 44100, 128);
const samples = new Int16Array(audioData); // audioData为WAV文件的音频数据

const mp3Data = [];

const sampleBlockSize = 1152;
const mp3BlockSize = 2 * sampleBlockSize;

for (let i = 0; i < samples.length; i += sampleBlockSize) {
  const left = samples.subarray(i, i + sampleBlockSize);
  const mp3buf = encoder.encodeBuffer(left);

  if (mp3buf.length > 0) {
    mp3Data.push(mp3buf);
  }
}

const mp3buf = encoder.flush();

if (mp3buf.length > 0) {
  mp3Data.push(mp3buf);
}

const mp3DataConcatenated = mp3Data.reduce((acc, curr) => {
  acc = acc.concat(Array.from(curr));
  return acc;
}, []);

const mp3Blob = new Blob([new Uint8Array(mp3DataConcatenated)], { type: 'audio/mp3' });

const compressedWavBlob = new WavPack.compressWav(inputWavBlob, compressionSettings);