--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DPF-Prymula-audioplugins/dpf/distrho/src/clap/ext/note-ports.h	Mon Oct 16 21:53:34 2023 +0200
@@ -0,0 +1,78 @@
+#pragma once
+
+#include "../plugin.h"
+#include "../string-sizes.h"
+
+/// @page Note Ports
+///
+/// This extension provides a way for the plugin to describe its current note ports.
+/// If the plugin does not implement this extension, it won't have note input or output.
+/// The plugin is only allowed to change its note ports configuration while it is deactivated.
+
+static CLAP_CONSTEXPR const char CLAP_EXT_NOTE_PORTS[] = "clap.note-ports";
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum clap_note_dialect {
+   // Uses clap_event_note and clap_event_note_expression.
+   CLAP_NOTE_DIALECT_CLAP = 1 << 0,
+
+   // Uses clap_event_midi, no polyphonic expression
+   CLAP_NOTE_DIALECT_MIDI = 1 << 1,
+
+   // Uses clap_event_midi, with polyphonic expression (MPE)
+   CLAP_NOTE_DIALECT_MIDI_MPE = 1 << 2,
+
+   // Uses clap_event_midi2
+   CLAP_NOTE_DIALECT_MIDI2 = 1 << 3,
+};
+
+typedef struct clap_note_port_info {
+   // id identifies a port and must be stable.
+   // id may overlap between input and output ports.
+   clap_id  id;
+   uint32_t supported_dialects;   // bitfield, see clap_note_dialect
+   uint32_t preferred_dialect;    // one value of clap_note_dialect
+   char     name[CLAP_NAME_SIZE]; // displayable name, i18n?
+} clap_note_port_info_t;
+
+// The note ports scan has to be done while the plugin is deactivated.
+typedef struct clap_plugin_note_ports {
+   // number of ports, for either input or output
+   // [main-thread]
+   uint32_t(CLAP_ABI *count)(const clap_plugin_t *plugin, bool is_input);
+
+   // get info about about a note port.
+   // [main-thread]
+   bool(CLAP_ABI *get)(const clap_plugin_t   *plugin,
+                       uint32_t               index,
+                       bool                   is_input,
+                       clap_note_port_info_t *info);
+} clap_plugin_note_ports_t;
+
+enum {
+   // The ports have changed, the host shall perform a full scan of the ports.
+   // This flag can only be used if the plugin is not active.
+   // If the plugin active, call host->request_restart() and then call rescan()
+   // when the host calls deactivate()
+   CLAP_NOTE_PORTS_RESCAN_ALL = 1 << 0,
+
+   // The ports name did change, the host can scan them right away.
+   CLAP_NOTE_PORTS_RESCAN_NAMES = 1 << 1,
+};
+
+typedef struct clap_host_note_ports {
+   // Query which dialects the host supports
+   // [main-thread]
+   uint32_t(CLAP_ABI *supported_dialects)(const clap_host_t *host);
+
+   // Rescan the full list of note ports according to the flags.
+   // [main-thread]
+   void(CLAP_ABI *rescan)(const clap_host_t *host, uint32_t flags);
+} clap_host_note_ports_t;
+
+#ifdef __cplusplus
+}
+#endif