added profile specific data

include/clap/ext/draft/midici-profiles.h

@@ -4,14 +4,14 @@
 
 //usage examples:
 //- the host can tell a MIDI keyboard the plugin conforms to the drawbar organ profile, so the keyboard can set up its faders for that.
-//- the plugin can adapt its MIDI controller mapping if a MIDI keyboard actives a profile (via the host).
-//- the host can send per-note articulations in note attributes if there's an active profile for this.
+//- the host can send per-note articulations in MIDI 2.0 protocol note-on attributes if there's an active profile for this.
 
 //the 5 bytes repesenting a profile go in a uint64_t.
 //the Default Control Change Mapping profile would be 0x00000000_0000217e for example.
 
-//TODO : for completeness this should work per-input port. Is that worth it?
-//TODO : for even more completeness it could work for outputs too. A MIDI effect plugin might want to know 
+//TODO : profiles can be different for each MIDI channel, and this should work per-input port.
+//       we can add that once we've agreed on the basic functionality.
+//TODO : for completeness it could work for outputs too. A MIDI effect plugin might want to know 
 //       the host can receive per-note articulations in note attributes for example.
 
 static CLAP_CONSTEXPR const char CLAP_EXT_MIDICI_PROFILES[] = "clap.midici-profiles.draft/0";
@@ -32,14 +32,32 @@ typedef struct clap_plugin_midici_profiles {
                        uint64_t                    *profile
                        bool                        *active);
 
-   //Actives a profile
-   //returns true if the profile was activated
-   //TODO : should this call struct clap_host_midici_profiles.changed or not?
+   // get number of bytes for profile specific data for the specified Inquiry Target
+   // if result=0 there's no data available for this Inquiry Target
+   // [main-thread]
+   uint32_t(CLAP_ABI *get_data_size)(const clap_plugin_t         *plugin,
+		                     uint32_t                     profile_index,
+                                     uint8_t                      inquiry_target);
+
+   // get profile specific data for the specified Inquiry Target
+   // buffer must be large enough to contain the number of bytes returned by get_data_size()
+   // [main-thread]
+   bool(CLAP_ABI *get_data)(const clap_plugin_t         *plugin,
+	                    uint32_t                     profile_index,
+                            uint8_t                      inquiry_target,
+                            const uint8_t               *buffer);
+
+   // Actives a profile, so the plugin knows the host will use this
+   // returns true if the profile was activated
+   // Note: do not call clap_host_midici_profiles.changed
+   // [main-thread]
    bool(CLAP_ABI *activate)(const clap_plugin_t    *plugin,
                             uint64_t                profile);
 
-   //Deactives a profile
-   //returns true if the profile was deactivated
+   // Deactives a profile
+   // returns true if the profile was deactivated
+   // Note: do not call clap_host_midici_profiles.changed
+   // [main-thread]
    bool(CLAP_ABI *deactivate)(const clap_plugin_t  *plugin,
                               uint64_t              profile);
 } clap_plugin_midici_profiles_t;