1 /*
2  * Copyright  2019 Google LLC
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  *     https://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 #ifndef ANDROID_FXLAB_IIRDESCRIPTION_H
18 #define ANDROID_FXLAB_IIRDESCRIPTION_H
19 
20 
21 #include "../CombFilter.h"
22 
23 namespace Effect {
24 class IIRDescription: public EffectDescription<IIRDescription, 3> {
25 public:
getName()26     static constexpr std::string_view getName() {
27         return std::string_view("IIR");
28     }
29 
getCategory()30     static constexpr std::string_view getCategory() {
31         return std::string_view("Comb");
32     }
33 
getParams()34     static constexpr std::array<ParamType, getNumParams()> getParams() {
35         return std::array<ParamType, getNumParams()> {
36             ParamType("Delay (samples)", 1, 500, 10),
37             ParamType("Gain", 0, 0.99, 0.5),
38             ParamType("Scale", 0.25, 0.99, 0.5)
39         };
40     }
41     template<class iter_type>
buildEffect(std::array<float,getNumParams ()> paramArr)42     static _ef<iter_type> buildEffect(std::array<float, getNumParams()> paramArr) {
43         return _ef<iter_type> {
44             CombFilter<iter_type>{paramArr[2], 0, paramArr[1], static_cast<int>(paramArr[0])}
45         };
46     }
47 };
48 } //namespace Effect
49 #
50 #endif //ANDROID_FXLAB_IIRDESCRIPTION_H
51