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Diffstat (limited to 'extern/audaspace/include/fx/Threshold.h')
-rw-r--r-- | extern/audaspace/include/fx/Threshold.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/extern/audaspace/include/fx/Threshold.h b/extern/audaspace/include/fx/Threshold.h new file mode 100644 index 00000000000..10baef1714d --- /dev/null +++ b/extern/audaspace/include/fx/Threshold.h @@ -0,0 +1,78 @@ +/******************************************************************************* + * 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 Threshold.h + * @ingroup fx + * The Threshold class. + */ + +#include "fx/Effect.h" + +AUD_NAMESPACE_BEGIN + +class CallbackIIRFilterReader; + +/** + * This sound Transforms any signal to a square signal by thresholding. + */ +class AUD_API Threshold : public Effect +{ +private: + /** + * The threshold. + */ + const float m_threshold; + + // delete copy constructor and operator= + Threshold(const Threshold&) = delete; + Threshold& operator=(const Threshold&) = delete; + +public: + /** + * Creates a new threshold sound. + * \param sound The input sound. + * \param threshold The threshold. + */ + Threshold(std::shared_ptr<ISound> sound, float threshold = 0.0f); + + /** + * Returns the threshold. + */ + float getThreshold() const; + + virtual std::shared_ptr<IReader> createReader(); + + /** + * The thresholdFilter function implements the doFilterIIR callback + * for the callback IIR filter. + * @param reader The CallbackIIRFilterReader that executes the callback. + * @param threshold The threshold value. + * @return The filtered sample. + */ + static sample_t AUD_LOCAL thresholdFilter(CallbackIIRFilterReader* reader, float* threshold); + + /** + * The endThresholdFilter function implements the endFilterIIR callback + * for the callback IIR filter. + * @param threshold The threshold value. + */ + static void AUD_LOCAL endThresholdFilter(float* threshold); +}; + +AUD_NAMESPACE_END |