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POAccessing MediaRecorder bytes while recording in Xamarin Android
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  1. POAccessing MediaRecorder bytes while recording in Xamarin Android
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    copied!<p>I would like to access the audio bytes that is being recorded by <code>MediaRecorder</code> during the recording process so I can send them with UdpClient to a server application.</p> <p>I'm able to do this with <code>AudioRecord</code> by doing the following (note the <code>while(true)</code> loop)</p> <pre><code> endRecording = false; isRecording = true; audioBuffer = new Byte[1024]; audioRecord = new AudioRecord ( // Hardware source of recording. AudioSource.Mic, // Frequency 11025, // Mono or stereo ChannelIn.Mono, // Audio encoding Android.Media.Encoding.Pcm16bit, // Length of the audio clip. audioBuffer.Length ); audioRecord.StartRecording (); while (true) { if (endRecording) { endRecording = false; break; } try { // Keep reading the buffer while there is audio input. int numBytes = await audioRecord.ReadAsync (audioBuffer, 0, audioBuffer.Length); //Send the audio data with the DataReceived event where it gets send over UdpClient in the Activity code byte[] encoded = audioBuffer; //TODO: encode audio data, for now just stick with regular PCM audio DataReceived(encoded); } catch (Exception ex) { Console.Out.WriteLine (ex.Message); break; } } audioRecord.Stop (); audioRecord.Release (); isRecording = false; </code></pre> <p>But I'm not sure how to get the bytes out of <code>MediaRecorder</code> so I can do something similar. Most of the examples I see only work with a file after the recording has been finished like the following example code from <a href="http://docs.xamarin.com/guides/android/application_fundamentals/working_with_audio" rel="nofollow">here</a> and <a href="http://developer.android.com/guide/topics/media/audio-capture.html" rel="nofollow">here</a>.</p> <p>I don't want to wait for a complete recording before it starts to send. I don't need <code>MediaRecorder</code> to record a file, just give me access to the bytes. But having the option to both write to a file and send the bytes would work well. Is there a way to do this, perhaps by using <code>ParcelFileDescriptor</code> or something else?</p>
 

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