1 /** 2 * @file 3 * @brief Header file for Delay 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_DELAY_AUDIO_EFFECT_H 32 #define OPENSHOT_DELAY_AUDIO_EFFECT_H 33 34 #include "../EffectBase.h" 35 36 #include "../Frame.h" 37 #include "../Json.h" 38 #include "../KeyFrame.h" 39 40 #include <memory> 41 #include <string> 42 #include <random> 43 #include <math.h> 44 45 46 namespace openshot 47 { 48 49 /** 50 * @brief This class adds a delay into the audio 51 * 52 */ 53 class Delay : public EffectBase 54 { 55 private: 56 /// Init effect settings 57 void init_effect_details(); 58 59 public: 60 Keyframe delay_time; 61 62 juce::AudioSampleBuffer delay_buffer; 63 int delay_buffer_samples; 64 int delay_buffer_channels; 65 int delay_write_position; 66 bool initialized; 67 68 /// Blank constructor, useful when using Json to load the effect properties 69 Delay(); 70 71 /// Default constructor 72 Delay(Keyframe new_delay_time); 73 74 /// @brief This method is required for all derived classes of ClipBase, and returns a 75 /// new openshot::Frame object. All Clip keyframes and effects are resolved into 76 /// pixels. 77 /// 78 /// @returns A new openshot::Frame object 79 /// @param frame_number The frame number (starting at 1) of the clip or effect on the timeline. GetFrame(int64_t frame_number)80 std::shared_ptr<openshot::Frame> GetFrame(int64_t frame_number) override { 81 return GetFrame(std::make_shared<openshot::Frame>(), frame_number); 82 } 83 84 void setup(std::shared_ptr<openshot::Frame> frame); 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 }; 107 108 } 109 110 #endif 111