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annotate DPF-Prymula-audioplugins/dpf/distrho/src/clap/ext/note-ports.h @ 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 #pragma once
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2
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3 #include "../plugin.h"
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4 #include "../string-sizes.h"
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5
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6 /// @page Note Ports
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7 ///
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8 /// This extension provides a way for the plugin to describe its current note ports.
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9 /// If the plugin does not implement this extension, it won't have note input or output.
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10 /// The plugin is only allowed to change its note ports configuration while it is deactivated.
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11
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12 static CLAP_CONSTEXPR const char CLAP_EXT_NOTE_PORTS[] = "clap.note-ports";
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13
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14 #ifdef __cplusplus
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15 extern "C" {
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16 #endif
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17
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18 enum clap_note_dialect {
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19 // Uses clap_event_note and clap_event_note_expression.
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20 CLAP_NOTE_DIALECT_CLAP = 1 << 0,
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21
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22 // Uses clap_event_midi, no polyphonic expression
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23 CLAP_NOTE_DIALECT_MIDI = 1 << 1,
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24
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25 // Uses clap_event_midi, with polyphonic expression (MPE)
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26 CLAP_NOTE_DIALECT_MIDI_MPE = 1 << 2,
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27
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28 // Uses clap_event_midi2
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29 CLAP_NOTE_DIALECT_MIDI2 = 1 << 3,
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30 };
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31
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32 typedef struct clap_note_port_info {
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33 // id identifies a port and must be stable.
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34 // id may overlap between input and output ports.
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35 clap_id id;
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36 uint32_t supported_dialects; // bitfield, see clap_note_dialect
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37 uint32_t preferred_dialect; // one value of clap_note_dialect
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38 char name[CLAP_NAME_SIZE]; // displayable name, i18n?
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39 } clap_note_port_info_t;
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40
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41 // The note ports scan has to be done while the plugin is deactivated.
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42 typedef struct clap_plugin_note_ports {
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43 // number of ports, for either input or output
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44 // [main-thread]
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45 uint32_t(CLAP_ABI *count)(const clap_plugin_t *plugin, bool is_input);
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46
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47 // get info about about a note port.
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48 // [main-thread]
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49 bool(CLAP_ABI *get)(const clap_plugin_t *plugin,
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50 uint32_t index,
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51 bool is_input,
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52 clap_note_port_info_t *info);
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53 } clap_plugin_note_ports_t;
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54
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55 enum {
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56 // The ports have changed, the host shall perform a full scan of the ports.
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57 // This flag can only be used if the plugin is not active.
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58 // If the plugin active, call host->request_restart() and then call rescan()
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59 // when the host calls deactivate()
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60 CLAP_NOTE_PORTS_RESCAN_ALL = 1 << 0,
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61
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62 // The ports name did change, the host can scan them right away.
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63 CLAP_NOTE_PORTS_RESCAN_NAMES = 1 << 1,
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64 };
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65
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66 typedef struct clap_host_note_ports {
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67 // Query which dialects the host supports
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68 // [main-thread]
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69 uint32_t(CLAP_ABI *supported_dialects)(const clap_host_t *host);
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70
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71 // Rescan the full list of note ports according to the flags.
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72 // [main-thread]
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73 void(CLAP_ABI *rescan)(const clap_host_t *host, uint32_t flags);
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74 } clap_host_note_ports_t;
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75
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76 #ifdef __cplusplus
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77 }
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78 #endif