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annotate DPF-Prymula-audioplugins/dpf/distrho/src/clap/plugin.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 "private/macros.h"
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4 #include "host.h"
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5 #include "process.h"
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6 #include "plugin-features.h"
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7
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8 #ifdef __cplusplus
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9 extern "C" {
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10 #endif
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11
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12 typedef struct clap_plugin_descriptor {
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13 clap_version_t clap_version; // initialized to CLAP_VERSION
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14
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15 // Mandatory fields must be set and must not be blank.
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16 // Otherwise the fields can be null or blank, though it is safer to make them blank.
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17 const char *id; // eg: "com.u-he.diva", mandatory
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18 const char *name; // eg: "Diva", mandatory
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19 const char *vendor; // eg: "u-he"
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20 const char *url; // eg: "https://u-he.com/products/diva/"
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21 const char *manual_url; // eg: "https://dl.u-he.com/manuals/plugins/diva/Diva-user-guide.pdf"
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22 const char *support_url; // eg: "https://u-he.com/support/"
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23 const char *version; // eg: "1.4.4"
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24 const char *description; // eg: "The spirit of analogue"
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25
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26 // Arbitrary list of keywords.
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27 // They can be matched by the host indexer and used to classify the plugin.
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28 // The array of pointers must be null terminated.
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29 // For some standard features see plugin-features.h
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30 const char **features;
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31 } clap_plugin_descriptor_t;
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32
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33 typedef struct clap_plugin {
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34 const clap_plugin_descriptor_t *desc;
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35
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36 void *plugin_data; // reserved pointer for the plugin
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37
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38 // Must be called after creating the plugin.
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39 // If init returns false, the host must destroy the plugin instance.
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40 // [main-thread]
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41 bool(CLAP_ABI *init)(const struct clap_plugin *plugin);
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42
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43 // Free the plugin and its resources.
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44 // It is required to deactivate the plugin prior to this call.
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45 // [main-thread & !active]
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46 void(CLAP_ABI *destroy)(const struct clap_plugin *plugin);
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47
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48 // Activate and deactivate the plugin.
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49 // In this call the plugin may allocate memory and prepare everything needed for the process
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50 // call. The process's sample rate will be constant and process's frame count will included in
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51 // the [min, max] range, which is bounded by [1, INT32_MAX].
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52 // Once activated the latency and port configuration must remain constant, until deactivation.
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53 //
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54 // [main-thread & !active_state]
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55 bool(CLAP_ABI *activate)(const struct clap_plugin *plugin,
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56 double sample_rate,
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57 uint32_t min_frames_count,
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58 uint32_t max_frames_count);
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59 // [main-thread & active_state]
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60 void(CLAP_ABI *deactivate)(const struct clap_plugin *plugin);
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61
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62 // Call start processing before processing.
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63 // [audio-thread & active_state & !processing_state]
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64 bool(CLAP_ABI *start_processing)(const struct clap_plugin *plugin);
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65
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66 // Call stop processing before sending the plugin to sleep.
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67 // [audio-thread & active_state & processing_state]
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68 void(CLAP_ABI *stop_processing)(const struct clap_plugin *plugin);
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69
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70 // - Clears all buffers, performs a full reset of the processing state (filters, oscillators,
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71 // enveloppes, lfo, ...) and kills all voices.
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72 // - The parameter's value remain unchanged.
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73 // - clap_process.steady_time may jump backward.
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74 //
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75 // [audio-thread & active_state]
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76 void(CLAP_ABI *reset)(const struct clap_plugin *plugin);
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77
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78 // process audio, events, ...
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79 // [audio-thread & active_state & processing_state]
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80 clap_process_status(CLAP_ABI *process)(const struct clap_plugin *plugin,
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81 const clap_process_t *process);
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82
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83 // Query an extension.
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84 // The returned pointer is owned by the plugin.
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85 // [thread-safe]
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86 const void *(CLAP_ABI *get_extension)(const struct clap_plugin *plugin, const char *id);
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87
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88 // Called by the host on the main thread in response to a previous call to:
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89 // host->request_callback(host);
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90 // [main-thread]
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91 void(CLAP_ABI *on_main_thread)(const struct clap_plugin *plugin);
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92 } clap_plugin_t;
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93
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94 #ifdef __cplusplus
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95 }
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96 #endif