1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.cts.verifier.audioquality; 18 19 /** 20 * Interface to native (C++) DSP code. 21 */ 22 public class Native { 23 public native short[] generateSinusoid(float freq, float duration, 24 float sampleRate, float amplitude, float ramp); 25 public native float[] measureRms(short[] pcm, float sampleRate, 26 float onsetThresh); 27 public native float[] glitchTest(float sampleRate, float stimFreq, 28 float onsetThresh, float dbSnrThresh, short[] pcm); 29 public native float[] overflowCheck(short[] pcm, float sampleRate); 30 public native float[] compareSpectra(short[] pcm, short[] refPcm, 31 float sampleRate); 32 public native float linearityTest(short[][] pcms, 33 float sampleRate, float dbStepSize, int referenceStim); 34 35 // The following indexes must match those in wrapper.cc 36 public static final int MEASURE_RMS_RMS = 0; 37 public static final int MEASURE_RMS_STD_DEV = 1; 38 public static final int MEASURE_RMS_DURATION = 2; 39 public static final int MEASURE_RMS_MEAN = 3; 40 41 public static final int OVERFLOW_DELTAS = 0; 42 public static final int OVERFLOW_ERROR = 1; 43 public static final int OVERFLOW_DURATION = 2; 44 public static final int OVERFLOW_ONSET = 3; 45 public static final int OVERFLOW_OFFSET = 4; 46 public static final int OVERFLOW_MAX = 5; 47 public static final int OVERFLOW_MIN = 6; 48 49 public static final int GLITCH_COUNT = 0; 50 public static final int GLITCH_ERROR = 1; 51 public static final int GLITCH_DURATION = 2; 52 53 public static final int SPECTRUM_MAX_DEVIATION = 0; 54 public static final int SPECTRUM_ERROR = 1; 55 public static final int SPECTRUM_RMS_DEVIATION = 2; 56 57 private static Native mInstance = null; 58 59 static { 60 System.loadLibrary("audioquality"); 61 } 62 63 private Native() {} 64 65 public static Native getInstance() { 66 if (mInstance == null) { 67 mInstance = new Native(); 68 } 69 return mInstance; 70 } 71 } 72
