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Diffstat (limited to 'extern/audaspace/include/fx/Accumulator.h')
-rw-r--r-- | extern/audaspace/include/fx/Accumulator.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/extern/audaspace/include/fx/Accumulator.h b/extern/audaspace/include/fx/Accumulator.h new file mode 100644 index 00000000000..d0c635d663c --- /dev/null +++ b/extern/audaspace/include/fx/Accumulator.h @@ -0,0 +1,79 @@ +/******************************************************************************* + * 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. + ******************************************************************************/ + +#pragma once + +/** + * @file Accumulator.h + * @ingroup fx + * The Accumulator class. + */ + +#include "fx/Effect.h" + +AUD_NAMESPACE_BEGIN + +class CallbackIIRFilterReader; + +/** + * This sound creates an accumulator reader. + * + * The accumulator adds the difference at the input to the last output in case + * it's positive. In additive mode it additionaly adds the difference always. + * So in case the difference is positive, it's added twice. + */ +class AUD_API Accumulator : public Effect +{ +private: + /** + * Whether the accumulator is additive. + */ + const bool m_additive; + + // delete copy constructor and operator= + Accumulator(const Accumulator&) = delete; + Accumulator& operator=(const Accumulator&) = delete; + +public: + /** + * Creates a new accumulator sound. + * \param sound The input sound. + * \param additive Whether the accumulator is additive. + */ + Accumulator(std::shared_ptr<ISound> sound, bool additive = false); + + virtual std::shared_ptr<IReader> createReader(); + + /** + * The accumulatorFilterAdditive function implements the doFilterIIR callback + * for the additive accumulator filter. + * @param reader The CallbackIIRFilterReader that executes the callback. + * @param useless A user defined pointer that is not needed for this filter. + * @return The filtered sample. + */ + static sample_t AUD_LOCAL accumulatorFilterAdditive(CallbackIIRFilterReader* reader, void* useless); + + /** + * The accumulatorFilter function implements the doFilterIIR callback + * for the non-additive accumulator filter. + * @param reader The CallbackIIRFilterReader that executes the callback. + * @param useless A user defined pointer that is not needed for this filter. + * @return The filtered sample. + */ + static sample_t AUD_LOCAL accumulatorFilter(CallbackIIRFilterReader* reader, void* useless); +}; + +AUD_NAMESPACE_END |