1 /** 2 * @file 3 * @brief Header file for Parametric EQ audio effect class 4 * @author 5 * 6 * @ref License 7 */ 8 9 /* LICENSE 10 * 11 * Copyright (c) 2008-2019 OpenShot Studios, LLC 12 * <http://www.openshotstudios.com/>. This file is part of 13 * OpenShot Library (libopenshot), an open-source project dedicated to 14 * delivering high quality video editing and animation solutions to the 15 * world. For more information visit <http://www.openshot.org/>. 16 * 17 * OpenShot Library (libopenshot) is free software: you can redistribute it 18 * and/or modify it under the terms of the GNU Lesser General Public License 19 * as published by the Free Software Foundation, either version 3 of the 20 * License, or (at your option) any later version. 21 * 22 * OpenShot Library (libopenshot) is distributed in the hope that it will be 23 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of 24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 25 * GNU Lesser General Public License for more details. 26 * 27 * You should have received a copy of the GNU Lesser General Public License 28 * along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>. 29 */ 30 31 #ifndef OPENSHOT_PARAMETRIC_EQ_AUDIO_EFFECT_H 32 #define OPENSHOT_PARAMETRIC_EQ_AUDIO_EFFECT_H 33 #define _USE_MATH_DEFINES 34 35 #include "../EffectBase.h" 36 37 #include "../Frame.h" 38 #include "../Json.h" 39 #include "../KeyFrame.h" 40 #include "../Enums.h" 41 42 #include <memory> 43 #include <string> 44 #include <math.h> 45 // #include <OpenShotAudio.h> 46 47 48 namespace openshot 49 { 50 51 /** 52 * @brief This class adds a equalization into the audio 53 * 54 */ 55 class ParametricEQ : public EffectBase 56 { 57 private: 58 /// Init effect settings 59 void init_effect_details(); 60 61 public: 62 openshot::FilterType filter_type; 63 Keyframe frequency; 64 Keyframe q_factor; 65 Keyframe gain; 66 bool initialized; 67 68 /// Blank constructor, useful when using Json to load the effect properties 69 ParametricEQ(); 70 71 /// Default constructor 72 /// 73 /// @param new_level 74 ParametricEQ(openshot::FilterType new_filter_type, Keyframe new_frequency, Keyframe new_gain, Keyframe new_q_factor); 75 76 /// @brief This method is required for all derived classes of ClipBase, and returns a 77 /// new openshot::Frame object. All Clip keyframes and effects are resolved into 78 /// pixels. 79 /// 80 /// @returns A new openshot::Frame object 81 /// @param frame_number The frame number (starting at 1) of the clip or effect on the timeline. GetFrame(int64_t frame_number)82 std::shared_ptr<openshot::Frame> GetFrame(int64_t frame_number) override { 83 return GetFrame(std::make_shared<openshot::Frame>(), frame_number); 84 } 85 86 /// @brief This method is required for all derived classes of ClipBase, and returns a 87 /// modified openshot::Frame object 88 /// 89 /// The frame object is passed into this method and used as a starting point (pixels and audio). 90 /// All Clip keyframes and effects are resolved into pixels. 91 /// 92 /// @returns The modified openshot::Frame object 93 /// @param frame The frame object that needs the clip or effect applied to it 94 /// @param frame_number The frame number (starting at 1) of the clip or effect on the timeline. 95 std::shared_ptr<openshot::Frame> GetFrame(std::shared_ptr<openshot::Frame> frame, int64_t frame_number) override; 96 97 // Get and Set JSON methods 98 std::string Json() const override; ///< Generate JSON string of this object 99 void SetJson(const std::string value) override; ///< Load JSON string into this object 100 Json::Value JsonValue() const override; ///< Generate Json::Value for this object 101 void SetJsonValue(const Json::Value root) override; ///< Load Json::Value into this object 102 103 /// Get all properties for a specific frame (perfect for a UI to display the current state 104 /// of all properties at any time) 105 std::string PropertiesJSON(int64_t requested_frame) const override; 106 107 class Filter : public IIRFilter 108 { 109 public: 110 void updateCoefficients (const double discrete_frequency, 111 const double q_factor, 112 const double gain, 113 const int filter_type); 114 }; 115 116 juce::OwnedArray<Filter> filters; 117 118 void updateFilters(int64_t frame_number, double sample_rate); 119 }; 120 121 } 122 123 #endif 124