@java.lang.Override
    public int getInputChannel() {
      return inputChannel_;
    }
<pre>
Required. The zero-based index of the channel in the input stream.
</pre>

<code>int32 input_channel = 3 [(.google.api.field_behavior) = REQUIRED];</code>

@return The inputChannel.
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/AudioStream.java