Android: I want to read buffers from mic so that i can perform process on it, Following is my code
int sampleRateInHz = 8000;// 44100, 22050 and 11025
int channelConfig = AudioFormat.CHANNEL_CONFIGURATION_MONO;
int audioFormat = AudioFormat.ENCODING_PCM_16BIT;
//int bufferSize =11025 +
int bufferSize = AudioRecord.getMinBufferSize(sampleRateInHz,channelConfig, audioFormat);
short[] buffer = new short[bufferSize];
AudioRecord audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleRateInHz,channelConfig, audioFormat, bufferSize);
if(audioRecord.getState()== AudioRecord.STATE_INITIALIZED){
audioRecord.startRecording();
Log.e("recording", "before");
boolean flag = true;
while (flag) {
int bufferReadResult = audioRecord.read(buffer, 0, bufferSize);
System.out.println(buffer);
}
audioRecord.stop();
audioRecord.release();
}
Log.e("recording", "stopeed");
<uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission>
I get following error every time i try to test the program
06-04 00:18:17.222: E/AudioRecord-Java(488): [ android.media.AudioRecord ] Error code -20 when initializing native AudioRecord object.
This exception is also raised if
From what I understand, CHANNEL_CONFIGURATION_MONO is depreciated and you should use instead CHANNEL_IN_MONO when reading into the buffer. I had a similar problem with instantiating the AudioRecord object and this turned out to be the solution for me.
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