readChannelData()

in 9-realtime/openai-realtime-console-example/src/lib/wavtools/lib/worklets/audio_processor.js [20:48]

• 29 lines of code
• 7 McCabe index (conditional complexity)

  readChannelData(chunks, channel = -1, maxChannels = 9) {
    let channelLimit;
    if (channel !== -1) {
      if (chunks[0] && chunks[0].length - 1 < channel) {
        throw new Error(
          \`Channel \${channel} out of range: max \${chunks[0].length}\`
        );
      }
      channelLimit = channel + 1;
    } else {
      channel = 0;
      channelLimit = Math.min(chunks[0] ? chunks[0].length : 1, maxChannels);
    }
    const channels = [];
    for (let n = channel; n < channelLimit; n++) {
      const length = chunks.reduce((sum, chunk) => {
        return sum + chunk[n].length;
      }, 0);
      const buffers = chunks.map((chunk) => chunk[n]);
      const result = new Float32Array(length);
      let offset = 0;
      for (let i = 0; i < buffers.length; i++) {
        result.set(buffers[i], offset);
        offset += buffers[i].length;
      }
      channels[n] = result;
    }
    return channels;
  }