/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations under
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* the License.
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*/
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#include <stdint.h>
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#include <gtest/gtest.h>
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#include <audio/AudioSignalFactory.h>
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class AudioSignalFactoryTest: public testing::Test {
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protected:
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void testSignalBasic(android::sp<Buffer>& buffer, int maxPositive,
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AudioHardware::SamplingRate samplingRate, int signalFreq, int samples) {
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ASSERT_TRUE(buffer->getSize() == (unsigned int)(AudioHardware::E2BPS * 2 * samples));
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int16_t* data = reinterpret_cast<int16_t*>(buffer->getData());
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for(int i = 0; i < samples; i++) {
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ASSERT_TRUE(*data <= maxPositive);
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ASSERT_TRUE(*data >= -maxPositive);
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data++;
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ASSERT_TRUE(*data <= maxPositive);
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ASSERT_TRUE(*data >= -maxPositive);
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data++;
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}
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}
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};
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TEST_F(AudioSignalFactoryTest, SineTest) {
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const int maxPositive = 1000;
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const int signalFreq = AudioHardware::ESampleRate_44100/100;
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const int samples = 8192 * 10;
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android::sp<Buffer> buffer = AudioSignalFactory::generateSineWave(AudioHardware::E2BPS,
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maxPositive, AudioHardware::ESampleRate_44100, signalFreq, samples);
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testSignalBasic(buffer, maxPositive, AudioHardware::ESampleRate_44100, signalFreq, samples);
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}
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TEST_F(AudioSignalFactoryTest, WhiteNoiseTest) {
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const int maxPositive = 1000;
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const int signalFreq = AudioHardware::ESampleRate_44100/100;
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const int samples = 8192 * 10;
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android::sp<Buffer> buffer = AudioSignalFactory::generateWhiteNoise(AudioHardware::E2BPS,
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maxPositive, samples);
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testSignalBasic(buffer, maxPositive, AudioHardware::ESampleRate_44100, signalFreq, samples);
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}
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