1 /* 2 * Copyright (C) 2017 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 "lb2/test_context.h" 18 19 #include <math.h> 20 #include <cmath> 21 22 AudioBufferView<sample_t> GlitchTestContext::getNextImpulse(size_t frameCount) { 23 constexpr double TWO_PI = 2.0 * M_PI; 24 auto sineBuffer = mSineBuffer.getView(0, frameCount); 25 for (size_t i = 0; i < sineBuffer.getFrameCount(); ++i) { 26 sample_t s = convertSampleType(std::sin(mPhaseRad) * SIGNAL_AMPLITUDE); 27 sample_t *d = sineBuffer.getFrameAt(i); 28 for (int j = 0; j < getChannelCount(); ++j) { 29 *d++ = s; 30 } 31 32 mPhaseRad += TWO_PI * mPhaseIncrementPerFrame; 33 while (mPhaseRad > TWO_PI) mPhaseRad -= TWO_PI; 34 } 35 return sineBuffer; 36 } 37
