小程序中合并多个ArrayBuffer生成PCM音频文件的方法

mergeArrayBuffers(arrayBuffers) {
    // 计算新的ArrayBuffer的总长度
    let totalLength = 0;
    for (const buffer of arrayBuffers) {
      totalLength += buffer.byteLength;
    }
    // 创建一个新的ArrayBuffer
    const mergedBuffer = new ArrayBuffer(totalLength);
    // 创建一个Uint8Array以便操作新的ArrayBuffer
    const uint8Array = new Uint8Array(mergedBuffer);
    let offset = 0;
    // 逐个复制ArrayBuffer到新的ArrayBuffer中
    for (const buffer of arrayBuffers) {
      const sourceArray = new Uint8Array(buffer);
      uint8Array.set(sourceArray, offset);
      offset += sourceArray.length;
    }
    return mergedBuffer;
  }