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extern/audaspace/src/fx/Accumulator.cpp
- This file was added.
| /******************************************************************************* | |||||
| * Copyright 2009-2016 Jörg Müller | |||||
| * | |||||
| * Licensed under the Apache License, Version 2.0 (the "License"); | |||||
| * you may not use this file except in compliance with the License. | |||||
| * You may obtain a copy of the License at | |||||
| * | |||||
| * http://www.apache.org/licenses/LICENSE-2.0 | |||||
| * | |||||
| * Unless required by applicable law or agreed to in writing, software | |||||
| * distributed under the License is distributed on an "AS IS" BASIS, | |||||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |||||
| * See the License for the specific language governing permissions and | |||||
| * limitations under the License. | |||||
| ******************************************************************************/ | |||||
| #include "fx/Accumulator.h" | |||||
| #include "fx/CallbackIIRFilterReader.h" | |||||
| AUD_NAMESPACE_BEGIN | |||||
| sample_t Accumulator::accumulatorFilterAdditive(CallbackIIRFilterReader* reader, void* useless) | |||||
| { | |||||
| float in = reader->x(0); | |||||
| float lastin = reader->x(-1); | |||||
| float out = reader->y(-1) + in - lastin; | |||||
| if(in > lastin) | |||||
| out += in - lastin; | |||||
| return out; | |||||
| } | |||||
| sample_t Accumulator::accumulatorFilter(CallbackIIRFilterReader* reader, void* useless) | |||||
| { | |||||
| float in = reader->x(0); | |||||
| float lastin = reader->x(-1); | |||||
| float out = reader->y(-1); | |||||
| if(in > lastin) | |||||
| out += in - lastin; | |||||
| return out; | |||||
| } | |||||
| Accumulator::Accumulator(std::shared_ptr<ISound> sound, | |||||
| bool additive) : | |||||
| Effect(sound), | |||||
| m_additive(additive) | |||||
| { | |||||
| } | |||||
| std::shared_ptr<IReader> Accumulator::createReader() | |||||
| { | |||||
| return std::shared_ptr<IReader>(new CallbackIIRFilterReader(getReader(), 2, 2, m_additive ? accumulatorFilterAdditive : accumulatorFilter)); | |||||
| } | |||||
| AUD_NAMESPACE_END | |||||