1 /* 2 * Copyright 2020 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 package org.hyphonate.megaaudio.player; 17 18 public class NativeAudioSource extends AudioSource { 19 private long mNativeSourcePtr; 20 NativeAudioSource(long nativeSourcePtr)21 public NativeAudioSource(long nativeSourcePtr) { 22 mNativeSourcePtr = nativeSourcePtr; 23 } 24 25 // Use this to call the AudioSource methods in C++ directly getNativeObject()26 public long getNativeObject() { return mNativeSourcePtr; } 27 28 @Override init(int numFrames, int numChans)29 public void init(int numFrames, int numChans) { 30 initN(mNativeSourcePtr, numFrames, numChans); 31 } 32 33 /** 34 * Specifies the sample rate for the source. 35 * @param sampleRate The sample rate for this source. 36 */ setSampleRate(int sampleRate)37 public void setSampleRate(int sampleRate) { 38 setSampleRateN(mNativeSourcePtr, sampleRate); 39 } 40 41 /** 42 * (for period sources) sets the frequency of the signal 43 * @param freq 44 */ setFreq(float freq)45 public void setFreq(float freq) { 46 setFreqN(mNativeSourcePtr, freq); 47 }; 48 49 // These can be called from Java, but only do so if you don't mind the JNI overhead 50 @Override reset()51 public void reset() { 52 resetN(mNativeSourcePtr); 53 } 54 55 @Override trigger()56 public void trigger() { 57 triggerN(mNativeSourcePtr); 58 } 59 60 @Override pull(float[] audioData, int numFrames, int numChans)61 public int pull(float[] audioData, int numFrames, int numChans) { 62 return pullN(mNativeSourcePtr, audioData, numFrames, numChans); 63 } 64 initN(long nativeSourcePtr, int numFrames, int numChans)65 private native void initN(long nativeSourcePtr, int numFrames, int numChans); setSampleRateN(long nativeSourcePtr, int sampleRate)66 private native void setSampleRateN(long nativeSourcePtr, int sampleRate); setFreqN(long nativeSourcePtr, float freq)67 private native void setFreqN(long nativeSourcePtr, float freq); resetN(long nativeSourcePtr)68 private native void resetN(long nativeSourcePtr); triggerN(long nativeSourcePtr)69 private native void triggerN(long nativeSourcePtr); pullN(long nativeSourcePtr, float[] audioData, int numFrames, int numChans)70 private native int pullN(long nativeSourcePtr, float[] audioData, int numFrames, int numChans); 71 } 72