On Saturday, April 30, 2016 at 2:30:27 PM UTC-4, Nilesh Darade wrote:
>
> My code to take audio recorder.
>
> Anything I missing?
>
>
> I know following code is not upto mark but I tried to extract what I have in
> the code.
>
>
>
> public static AudioRecord findAudioRecord(Context context) {
> AudioRecord recorder = null;
> try {
> AudioManager audioManager = (AudioManager)
> context.getSystemService(Context.AUDIO_SERVICE);
> int _rate =
> Integer.parseInt(audioManager.getProperty(AudioManager.PROPERTY_OUTPUT_SAMPLE_RATE));
> //int bufferSize =
> Integer.parseInt(audioManager.getProperty(AudioManager.PROPERTY_OUTPUT_FRAMES_PER_BUFFER));
> for (short audioFormat : new short[]{AudioFormat.ENCODING_PCM_8BIT,
> AudioFormat.ENCODING_PCM_16BIT}) {
> for (short channelConfig : new
> short[]{AudioFormat.CHANNEL_IN_MONO, AudioFormat.CHANNEL_IN_STEREO}) {
>
> Log.d(TAG, "Attempting rate " + _rate + "Hz, bits: " +
> audioFormat + ", channel: "
> + channelConfig);
> int bufferSize = AudioRecord.getMinBufferSize(_rate,
> channelConfig, audioFormat);
> if (bufferSize != AudioRecord.ERROR_BAD_VALUE) {
> // check if we can instantiate and have a success
> recorder = new
> AudioRecord(MediaRecorder.AudioSource.DEFAULT, _rate, channelConfig,
> audioFormat, bufferSize);
>
> if (recorder.getState() == AudioRecord.STATE_INITIALIZED)
> {
> _bufferSize = bufferSize;
> return recorder;
> }
> }
>
> }
> }
> } catch (Exception e) {
> Log.e(TAG, "Exception, keep trying.", e);
> }
>
> // I'm removing above configurations (_rate) from below code...
>
>
> for (int rate : new int[]{8000, 11025, 16000, 22050, 44100}) {
> for (short audioFormat : new short[]{AudioFormat.ENCODING_PCM_8BIT,
> AudioFormat.ENCODING_PCM_16BIT}) {
> for (short channelConfig : new
> short[]{AudioFormat.CHANNEL_IN_MONO, AudioFormat.CHANNEL_IN_STEREO}) {
> try {
> Log.d(TAG, "Attempting rate " + rate + "Hz, bits: " +
> audioFormat + ", channel: "
> + channelConfig);
> bufferSize = AudioRecord.getMinBufferSize(rate,
> channelConfig, audioFormat);
>
> if (bufferSize != AudioRecord.ERROR_BAD_VALUE) {
> // check if we can instantiate and have a success
> recorder = new
> AudioRecord(MediaRecorder.AudioSource.DEFAULT, rate, channelConfig,
> audioFormat, bufferSize);
>
> if (recorder.getState() ==
> AudioRecord.STATE_INITIALIZED) {
> _bufferSize = bufferSize;
> return recorder;
> }
> }
> } catch (Exception e) {
> Log.e(TAG, rate + "Exception, keep trying.", e);
> }
> }
> }
> }
> return null;
> }
>
>
>
>
>
>
I test drove your 2nd code snippet and found it worked on all
configurations with the exception that any 8 bit attempt would always fail.
This confirms what I found with various tablets and phones.
If your Samsung tablet is failing on all attempts try changing
MediaRecorder.AudioSource.*DEFAULT* to MediaRecorder.AudioSource.MIC
If you want a separate baseline, test drive my VoIP app, it lets you test
microphone input to speaker output dynamically when configuring the voice
codec.
https://play.google.com/store/apps/details?id=threezwireless.com.mobilevoicertp
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