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1 /*
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2
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3 Copyright (C) 2016 Queen Mary University of London
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4 Author: Fiore Martin
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5
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6 This file is part of Collidoscope.
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7
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8 Collidoscope is free software: you can redistribute it and/or modify
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9 it under the terms of the GNU General Public License as published by
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10 the Free Software Foundation, either version 3 of the License, or
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11 (at your option) any later version.
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12
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13 This program is distributed in the hope that it will be useful,
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU General Public License for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with this program. If not, see <http://www.gnu.org/licenses/>.
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20 */
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21
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22 #pragma once
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23
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24 /**
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25 * Enumeration of all the possible commands exchanged between audio thread and graphic thread.
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26 *
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27 */
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28 enum class Command {
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29 // message carrying info about one chunk of recorder audio.
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30 WAVE_CHUNK,
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31 // message sent when a new recording starts. The gui resets the wave upon receiving it.
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32 WAVE_START,
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33
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34 // new grain created
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35 TRIGGER_UPDATE,
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36 // synth became idle
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37 TRIGGER_END,
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38
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39 NOTE_ON,
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40 NOTE_OFF,
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41
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42 LOOP_ON,
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43 LOOP_OFF
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44 };
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45
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46 /** Message sent from the audio thread to the graphic wave when a new wave is recorded.
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47 *
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48 * The graphic thread sets the chunks of the wave to reflect the level of the recorded audio.
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49 * The algorithm takes the maximum and minimum value of a group of samples and this becomes the top and bottom of the chunk.
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50 * The message carries also the index of the chunk it refers to
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51 */
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52 struct RecordWaveMsg
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53 {
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54 Command cmd; // WAVE_CHUNK or WAVE_START
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55 std::size_t index;
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56 float arg1;
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57 float arg2;
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58 };
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59
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60 /**
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61 * Utility function to create a new RecordWaveMsg.
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62 */
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63 inline RecordWaveMsg makeRecordWaveMsg( Command cmd, std::size_t index, float arg1, float arg2 )
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64 {
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65 RecordWaveMsg msg;
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66 msg.cmd = cmd;
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67 msg.index = index;
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68 msg.arg1 = arg1;
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69 msg.arg2 = arg2;
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70
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71 return msg;
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72 }
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73
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74 /**
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75 * Message sent from the audio thread to the graphic thread when a new grain is triggered in the granular synthesizer.
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76 * This creates a new cursor that travels from the beginning to the end of the selection to graphically represent the evolution of the grain in time.
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77 *
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78 */
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79 struct CursorTriggerMsg
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80 {
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81 Command cmd; // TRIGGER_UPDATE or TRIGGER_END
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82 int synthID;
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83 };
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84
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85 /**
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86 * Utility function to create a new CursorTriggerMsg.
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87 */
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88 inline CursorTriggerMsg makeCursorTriggerMsg( Command cmd, std::uint8_t synthID )
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89 {
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90 CursorTriggerMsg msg;
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91
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92 msg.cmd = cmd;
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93 msg.synthID = synthID;
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94
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95 return msg;
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96 }
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97
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98 /**
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99 * Message sent from the graphic (main) thread to the audio thread to start a new voice of the granular synthesizer.
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100 */
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101 struct NoteMsg
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102 {
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103 Command cmd; // NOTE_ON/OFF ot LOOP_ON/OFF
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104 int midiNote;
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105 double rate;
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106 };
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107
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108 /**
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109 * Utility function to create a new NoteMsg.
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110 */
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111 inline NoteMsg makeNoteMsg( Command cmd, int midiNote, double rate )
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112 {
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113 NoteMsg msg;
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114
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115 msg.cmd = cmd;
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116 msg.midiNote = midiNote;
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117 msg.rate = rate;
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118
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119 return msg;
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120 }
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