1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not 5 * use this file except in compliance with the License. You may obtain a copy of 6 * 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, WITHOUT 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 13 * License for the specific language governing permissions and limitations under 14 * the License. 15 */ 16 #include <stdint.h> 17 18 #include <gtest/gtest.h> 19 20 #include <audio/AudioSignalFactory.h> 21 22 class AudioSignalFactoryTest: public testing::Test { 23 protected: 24 25 void testSignalBasic(android::sp<Buffer>& buffer, int maxPositive, 26 AudioHardware::SamplingRate samplingRate, int signalFreq, int samples) { 27 ASSERT_TRUE(buffer->getSize() == (unsigned int)(AudioHardware::E2BPS * 2 * samples)); 28 int16_t* data = reinterpret_cast<int16_t*>(buffer->getData()); 29 for(int i = 0; i < samples; i++) { 30 ASSERT_TRUE(*data <= maxPositive); 31 ASSERT_TRUE(*data >= -maxPositive); 32 data++; 33 ASSERT_TRUE(*data <= maxPositive); 34 ASSERT_TRUE(*data >= -maxPositive); 35 data++; 36 } 37 } 38 }; 39 40 TEST_F(AudioSignalFactoryTest, SineTest) { 41 const int maxPositive = 1000; 42 const int signalFreq = AudioHardware::ESampleRate_44100/100; 43 const int samples = 8192 * 10; 44 android::sp<Buffer> buffer = AudioSignalFactory::generateSineWave(AudioHardware::E2BPS, 45 maxPositive, AudioHardware::ESampleRate_44100, signalFreq, samples); 46 testSignalBasic(buffer, maxPositive, AudioHardware::ESampleRate_44100, signalFreq, samples); 47 } 48 49 TEST_F(AudioSignalFactoryTest, WhiteNoiseTest) { 50 const int maxPositive = 1000; 51 const int signalFreq = AudioHardware::ESampleRate_44100/100; 52 const int samples = 8192 * 10; 53 android::sp<Buffer> buffer = AudioSignalFactory::generateWhiteNoise(AudioHardware::E2BPS, 54 maxPositive, samples); 55 testSignalBasic(buffer, maxPositive, AudioHardware::ESampleRate_44100, signalFreq, samples); 56 } 57 58
