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
testSignalBasic(android::sp<Buffer> & buffer,int maxPositive,AudioHardware::SamplingRate samplingRate,int signalFreq,int samples)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
TEST_F(AudioSignalFactoryTest,SineTest)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
TEST_F(AudioSignalFactoryTest,WhiteNoiseTest)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