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 
17 
18 #ifndef CTSAUDIO_AUDIOSIGNALFACTORY_H
19 #define CTSAUDIO_AUDIOSIGNALFACTORY_H
20 
21 #include <utils/StrongPointer.h>
22 
23 #include "AudioHardware.h"
24 #include "Buffer.h"
25 /**
26  * factory for creating various audio signals
27  */
28 class AudioSignalFactory {
29 public:
30     static android::sp<Buffer> generateSineWave(AudioHardware::BytesPerSample BPS,
31             int maxPositive, AudioHardware::SamplingRate samplingRate, int signalFreq, int samples,
32             bool stereo = true);
33     static android::sp<Buffer> generateWhiteNoise(AudioHardware::BytesPerSample BPS,
34             int maxPositive, int samples, bool stereo = true);
35     static android::sp<Buffer> generateZeroSound(AudioHardware::BytesPerSample BPS,
36             int samples, bool stereo = true);
37 };
38 
39 
40 #endif // CTSAUDIO_AUDIOSIGNALFACTORY_H
41