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POAudioRecord - how to get data in to buffer?
 

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    <p>I' m having some issues using AudioRecord class. I want to store recorded data in a buffer, but I' m not sure what is the proper way to achieve that. I went through great number of examples, but most of them were comlicated and representing many different approaches. I' m looking for simple one or simple explanation.</p> <p>Here are my audio settings for my project:</p> <pre><code>int audioSource = AudioSource.MIC; int sampleRateInHz = 8000; int channelConfig = AudioFormat.CHANNEL_IN_MONO; int audioFormat = AudioFormat.ENCODING_PCM_16BIT; int bufferSizeInBytes = AudioRecord.getMinBufferSize(sampleRateInHz, channelConfig, audioFormat); short[] buffer = new short[bufferSizeInBytes]; AudioRecord audioRecorder = new AudioRecord(audioSource, sampleRateInHz, channelConfig, audioFormat, bufferSizeInBytes); </code></pre> <p>I' m trying to create a Recording function:</p> <pre><code>public void Recording() { audioRecorder.startRecording(); ... audioRecorder.stop(); audioRecorder.release(); } </code></pre> <p>I know that I' m supposed to use .read(short[] audioData, int offsetInShorts, int sizeInShorts) function. And here my problems start. I' m not sure how audioData buffer works - I assume function puts recorded samples into the audioData. What happens if it completely filled with data? It starts rewriting from the earliest position? If it does I believe I have to copy all collected samples somwhere else. It raises another question - how can I check if .read(...) function buffer is already full? Do I need to measure time and copy buffer content or there is another way to reach that? Also do I need to create a thread for whole recording operation?</p> <p>Sorry for asking so many questions in one topic :)</p>
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