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annotate DPF-Prymula-audioplugins/dpf/distrho/src/clap/ext/audio-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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3
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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 Audio Ports
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7 ///
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8 /// This extension provides a way for the plugin to describe its current audio ports.
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9 ///
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10 /// If the plugin does not implement this extension, it won't have audio ports.
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11 ///
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12 /// 32 bits support is required for both host and plugins. 64 bits audio is optional.
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13 ///
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14 /// The plugin is only allowed to change its ports configuration while it is deactivated.
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15
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16 static CLAP_CONSTEXPR const char CLAP_EXT_AUDIO_PORTS[] = "clap.audio-ports";
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17 static CLAP_CONSTEXPR const char CLAP_PORT_MONO[] = "mono";
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18 static CLAP_CONSTEXPR const char CLAP_PORT_STEREO[] = "stereo";
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19
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20 #ifdef __cplusplus
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21 extern "C" {
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22 #endif
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23
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24 enum {
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25 // This port is the main audio input or output.
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26 // There can be only one main input and main output.
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27 // Main port must be at index 0.
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28 CLAP_AUDIO_PORT_IS_MAIN = 1 << 0,
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29
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30 // This port can be used with 64 bits audio
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31 CLAP_AUDIO_PORT_SUPPORTS_64BITS = 1 << 1,
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32
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33 // 64 bits audio is preferred with this port
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34 CLAP_AUDIO_PORT_PREFERS_64BITS = 1 << 2,
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35
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36 // This port must be used with the same sample size as all the other ports which have this flag.
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37 // In other words if all ports have this flag then the plugin may either be used entirely with
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38 // 64 bits audio or 32 bits audio, but it can't be mixed.
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39 CLAP_AUDIO_PORT_REQUIRES_COMMON_SAMPLE_SIZE = 1 << 3,
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40 };
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41
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42 typedef struct clap_audio_port_info {
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43 // id identifies a port and must be stable.
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44 // id may overlap between input and output ports.
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45 clap_id id;
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46 char name[CLAP_NAME_SIZE]; // displayable name
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47
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48 uint32_t flags;
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49 uint32_t channel_count;
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50
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51 // If null or empty then it is unspecified (arbitrary audio).
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52 // This filed can be compared against:
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53 // - CLAP_PORT_MONO
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54 // - CLAP_PORT_STEREO
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55 // - CLAP_PORT_SURROUND (defined in the surround extension)
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56 // - CLAP_PORT_AMBISONIC (defined in the ambisonic extension)
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57 // - CLAP_PORT_CV (defined in the cv extension)
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58 //
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59 // An extension can provide its own port type and way to inspect the channels.
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60 const char *port_type;
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61
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62 // in-place processing: allow the host to use the same buffer for input and output
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63 // if supported set the pair port id.
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64 // if not supported set to CLAP_INVALID_ID
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65 clap_id in_place_pair;
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66 } clap_audio_port_info_t;
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67
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68 // The audio ports scan has to be done while the plugin is deactivated.
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69 typedef struct clap_plugin_audio_ports {
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70 // number of ports, for either input or output
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71 // [main-thread]
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72 uint32_t(CLAP_ABI *count)(const clap_plugin_t *plugin, bool is_input);
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73
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74 // get info about about an audio port.
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75 // [main-thread]
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76 bool(CLAP_ABI *get)(const clap_plugin_t *plugin,
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77 uint32_t index,
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78 bool is_input,
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79 clap_audio_port_info_t *info);
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80 } clap_plugin_audio_ports_t;
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81
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82 enum {
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83 // The ports name did change, the host can scan them right away.
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84 CLAP_AUDIO_PORTS_RESCAN_NAMES = 1 << 0,
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85
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86 // [!active] The flags did change
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87 CLAP_AUDIO_PORTS_RESCAN_FLAGS = 1 << 1,
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88
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89 // [!active] The channel_count did change
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90 CLAP_AUDIO_PORTS_RESCAN_CHANNEL_COUNT = 1 << 2,
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91
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92 // [!active] The port type did change
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93 CLAP_AUDIO_PORTS_RESCAN_PORT_TYPE = 1 << 3,
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94
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95 // [!active] The in-place pair did change, this requires.
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96 CLAP_AUDIO_PORTS_RESCAN_IN_PLACE_PAIR = 1 << 4,
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97
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98 // [!active] The list of ports have changed: entries have been removed/added.
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99 CLAP_AUDIO_PORTS_RESCAN_LIST = 1 << 5,
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100 };
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101
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102 typedef struct clap_host_audio_ports {
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103 // Checks if the host allows a plugin to change a given aspect of the audio ports definition.
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104 // [main-thread]
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105 bool(CLAP_ABI *is_rescan_flag_supported)(const clap_host_t *host, uint32_t flag);
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106
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107 // Rescan the full list of audio ports according to the flags.
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108 // It is illegal to ask the host to rescan with a flag that is not supported.
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109 // Certain flags require the plugin to be de-activated.
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110 // [main-thread]
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111 void(CLAP_ABI *rescan)(const clap_host_t *host, uint32_t flags);
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112 } clap_host_audio_ports_t;
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113
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114 #ifdef __cplusplus
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115 }
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116 #endif