Android audio format autodetection code

AudioDetect.java

do {
    switch (sampleRate) {
        case -1:
            sampleRate = Constants.SAMPLE_RATE_22KHZ;
            break;
        case Constants.SAMPLE_RATE_44KHZ:
            sampleRate = Constants.SAMPLE_RATE_22KHZ;
            break;
        case Constants.SAMPLE_RATE_22KHZ:
            sampleRate = Constants.SAMPLE_RATE_11KHZ;
            break;
        case Constants.SAMPLE_RATE_11KHZ:
            sampleRate = Constants.SAMPLE_RATE_8KHZ;
            break;
        default:
            Log.w("AudioHelper", String.format("Hardware does not support recording!"));
            DialogHelper.showWarning(context, R.string.unable_to_configure_audio_title, R.string.unable_to_configure_audio_warning);
            return;
    }
    bufferSize = AudioRecord.getMinBufferSize(
        sampleRate, 
        Constants.DEFAULT_CHANNEL_CONFIG, 
        Constants.DEFAULT_PCM_FORMAT);
} while (bufferSize == AudioRecord.ERROR_BAD_VALUE);