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