diff options
Diffstat (limited to 'extern/audaspace/src/fx/Accumulator.cpp')
-rw-r--r-- | extern/audaspace/src/fx/Accumulator.cpp | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/extern/audaspace/src/fx/Accumulator.cpp b/extern/audaspace/src/fx/Accumulator.cpp new file mode 100644 index 00000000000..ba8e6a2841e --- /dev/null +++ b/extern/audaspace/src/fx/Accumulator.cpp @@ -0,0 +1,54 @@ +/******************************************************************************* + * 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 |