function audioBuffersToWAV()

in client/src/util/audio.ts [158:193]

• 25 lines of code
• 3 McCabe index (conditional complexity)

function audioBuffersToWAV(sampleBuffer: Float32Array, sampleRate: number): Blob {
  const sampleCount = sampleBuffer.length;
  const buffer = new ArrayBuffer(44 + sampleCount * 2);
  const view = new DataView(buffer);
  writeWAVString(view, 0, 'RIFF');
  // file length
  view.setUint32(4, 32 + sampleCount * 2, true);
  writeWAVString(view, 8, 'WAVE');
  writeWAVString(view, 12, 'fmt ');
  // chunk length
  view.setUint32(16, 16, true);
  // sample format
  view.setUint16(20, 1, true);
  // channel count
  view.setUint16(22, 1, true);
  // sample rate
  view.setUint32(24, sampleRate, true);
  // byte rate
  view.setUint32(28, sampleRate * 4, true);
  // block align
  view.setUint16(32, 4, true);
  // bits per sample
  view.setUint16(34, 16, true);
  // data chunk identifier
  writeWAVString(view, 36, 'data');
  // data length
  view.setUint32(40, sampleCount * 2, true);
  // data
  let offset = 44;
  for (const spl of sampleBuffer) {
    const s = Math.max(-1, Math.min(1, spl));
    view.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7FFF, true);
    offset += 2;
  }
  return new Blob([buffer], { type: 'audio/wav' });
}