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Diffstat (limited to 'extern/audaspace/include/fx/Envelope.h')
-rw-r--r-- | extern/audaspace/include/fx/Envelope.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/extern/audaspace/include/fx/Envelope.h b/extern/audaspace/include/fx/Envelope.h new file mode 100644 index 00000000000..3d44e897b3a --- /dev/null +++ b/extern/audaspace/include/fx/Envelope.h @@ -0,0 +1,93 @@ +/******************************************************************************* + * 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 Envelope.h + * @ingroup fx + * The Envelope class. + */ + +#include "fx/Effect.h" + +AUD_NAMESPACE_BEGIN + +class CallbackIIRFilterReader; +struct EnvelopeParameters; + +/** + * This sound creates an envelope follower reader. + */ +class AUD_API Envelope : public Effect +{ +private: + /** + * The attack value in seconds. + */ + const float m_attack; + + /** + * The release value in seconds. + */ + const float m_release; + + /** + * The threshold value. + */ + const float m_threshold; + + /** + * The attack/release threshold value. + */ + const float m_arthreshold; + + // delete copy constructor and operator= + Envelope(const Envelope&) = delete; + Envelope& operator=(const Envelope&) = delete; + +public: + /** + * Creates a new envelope sound. + * \param sound The input sound. + * \param attack The attack value in seconds. + * \param release The release value in seconds. + * \param threshold The threshold value. + * \param arthreshold The attack/release threshold value. + */ + Envelope(std::shared_ptr<ISound> sound, float attack, float release, + float threshold, float arthreshold); + + virtual std::shared_ptr<IReader> createReader(); + + /** + * The envelopeFilter function implements the doFilterIIR callback + * for the callback IIR filter. + * @param reader The CallbackIIRFilterReader that executes the callback. + * @param param The envelope parameters. + * @return The filtered sample. + */ + static sample_t AUD_LOCAL envelopeFilter(CallbackIIRFilterReader* reader, EnvelopeParameters* param); + + /** + * The endEnvelopeFilter function implements the endFilterIIR callback + * for the callback IIR filter. + * @param param The envelope parameters. + */ + static void AUD_LOCAL endEnvelopeFilter(EnvelopeParameters* param); +}; + +AUD_NAMESPACE_END |