1 /* 2 * Copyright 2022 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 #include <math.h> 18 #include <unistd.h> 19 20 #include "WhiteNoise.h" 21 onProcess(int32_t numFrames)22int32_t WhiteNoise::onProcess(int32_t numFrames) { 23 const float *amplitudes = amplitude.getBuffer(); 24 float *buffer = output.getBuffer(); 25 26 for (int i = 0; i < numFrames; i++) { 27 float noise = (float) mPseudoRandom.nextRandomDouble(); // -1 to +1 28 *buffer++ = noise * (*amplitudes++); 29 } 30 31 return numFrames; 32 } 33