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 
getNextImpulse(size_t frameCount)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