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annotate DPF-Prymula-audioplugins/dpf/distrho/src/DistrhoPluginStub.cpp @ 3:84e66ea83026

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DPF-Prymula-audioplugins-0.231015-2
author prymula <prymula76@outlook.com>
date Mon, 16 Oct 2023 21:53:34 +0200
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1 /*
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2 * DISTRHO Plugin Framework (DPF)
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3 * Copyright (C) 2012-2022 Filipe Coelho <falktx@falktx.com>
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4 *
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5 * Permission to use, copy, modify, and/or distribute this software for any purpose with
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6 * or without fee is hereby granted, provided that the above copyright notice and this
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7 * permission notice appear in all copies.
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8 *
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9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
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10 * TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN
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11 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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12 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
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13 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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15 */
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16
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17 #include "DistrhoPluginInternal.hpp"
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18
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19 START_NAMESPACE_DISTRHO
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20
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21 // --------------------------------------------------------------------------------------------------------------------
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22
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23 #if ! DISTRHO_PLUGIN_WANT_MIDI_OUTPUT
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24 static constexpr const writeMidiFunc writeMidiCallback = nullptr;
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25 #endif
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26 #if ! DISTRHO_PLUGIN_WANT_PARAMETER_VALUE_CHANGE_REQUEST
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27 static constexpr const requestParameterValueChangeFunc requestParameterValueChangeCallback = nullptr;
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28 #endif
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29 #if ! DISTRHO_PLUGIN_WANT_STATE
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30 static const updateStateValueFunc updateStateValueCallback = nullptr;
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31 #endif
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32
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33 // --------------------------------------------------------------------------------------------------------------------
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34
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35 /**
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36 * Stub plugin class, does nothing but serving as example code for other implementations.
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37 */
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38 class PluginStub
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39 {
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40 public:
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41 PluginStub()
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42 : fPlugin(this,
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43 writeMidiCallback,
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44 requestParameterValueChangeCallback,
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45 updateStateValueCallback)
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46 {
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47 }
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48
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49 // ----------------------------------------------------------------------------------------------------------------
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50
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51 private:
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52 // Plugin
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53 PluginExporter fPlugin;
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54
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55 // ----------------------------------------------------------------------------------------------------------------
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56 // DPF callbacks
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57
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58 #if DISTRHO_PLUGIN_WANT_MIDI_OUTPUT
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59 bool writeMidi(const MidiEvent&)
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60 {
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61 return true;
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62 }
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63
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64 static bool writeMidiCallback(void* const ptr, const MidiEvent& midiEvent)
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65 {
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66 return ((PluginStub*)ptr)->writeMidi(midiEvent);
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67 }
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68 #endif
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69
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70 #if DISTRHO_PLUGIN_WANT_PARAMETER_VALUE_CHANGE_REQUEST
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71 bool requestParameterValueChange(uint32_t, float)
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72 {
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73 return true;
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74 }
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75
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76 static bool requestParameterValueChangeCallback(void* const ptr, const uint32_t index, const float value)
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77 {
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78 return ((PluginStub*)ptr)->requestParameterValueChange(index, value);
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79 }
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80 #endif
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81
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82 #if DISTRHO_PLUGIN_WANT_STATE
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83 bool updateState(const char*, const char*)
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84 {
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85 return true;
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86 }
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87
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88 static bool updateStateValueCallback(void* const ptr, const char* const key, const char* const value)
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89 {
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90 return ((PluginStub*)ptr)->updateState(key, value);
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91 }
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92 #endif
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93 };
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94
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95 END_NAMESPACE_DISTRHO
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96
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97 // --------------------------------------------------------------------------------------------------------------------