1 /*******************************************************************************
2  * Copyright 2009-2016 Jörg Müller
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *   http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  ******************************************************************************/
16 
17 #pragma once
18 
19 /**
20  * @file DynamicIIRFilter.h
21  * @ingroup fx
22  * The DynamicIIRFilter class.
23  */
24 
25 #include "fx/Effect.h"
26 
27 AUD_NAMESPACE_BEGIN
28 
29 class IDynamicIIRFilterCalculator;
30 
31 /**
32  * This sound creates a IIR filter reader.
33  *
34  * This means that on sample rate change the filter recalculates its
35  * coefficients.
36  */
37 class AUD_API DynamicIIRFilter : public Effect
38 {
39 protected:
40 	/// The IDynamicIIRFilterCalculator that calculates the dynamic filter coefficients.
41 	std::shared_ptr<IDynamicIIRFilterCalculator> m_calculator;
42 
43 public:
44 	/**
45 	 * Creates a new Dynmic IIR filter sound.
46 	 * \param sound The input sound.
47 	 * \param calculator The calculator which recalculates the dynamic filter coefficients.
48 	 */
49 	DynamicIIRFilter(std::shared_ptr<ISound> sound, std::shared_ptr<IDynamicIIRFilterCalculator> calculator);
50 
51 	virtual std::shared_ptr<IReader> createReader();
52 };
53 
54 AUD_NAMESPACE_END
55