Carla/source/includes/lv2/midnam.h

/*
  Copyright 2016 Robin Gareus <robin@gareus.org>
  Permission to use, copy, modify, and/or distribute this software for any
  purpose with or without fee is hereby granted, provided that the above
  copyright notice and this permission notice appear in all copies.
  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#ifndef LV2_MIDNAM_H
#define LV2_MIDNAM_H

#include "lv2.h"

/**
   @defgroup lv2midnam MIDI Naming
   @{
*/

#define LV2_MIDNAM_URI "http://ardour.org/lv2/midnam"
#define LV2_MIDNAM_PREFIX LV2_MIDNAM_URI "#"
#define LV2_MIDNAM__interface LV2_MIDNAM_PREFIX "interface"
#define LV2_MIDNAM__update LV2_MIDNAM_PREFIX "update"

typedef void* LV2_Midnam_Handle;

/** a LV2 Feature provided by the Host to the plugin */
typedef struct {
	/** Opaque host data */
	LV2_Midnam_Handle handle;
	/** Request from run() that the host should re-read the midnam */
	void (*update)(LV2_Midnam_Handle handle);
} LV2_Midnam;

typedef struct {
	/** Query midnam document. The plugin
	 * is expected to return a null-terminated XML
	 * text which is a valid midnam desciption
	 * (or NULL in case of error).
	 *
	 * The midnam \<Model\> must be unique and
	 * specific for the given plugin-instance.
	 */
	char* (*midnam)(LV2_Handle instance);

	/** The unique model id used ith the midnam,
	 * (or NULL).
	 */
	char* (*model)(LV2_Handle instance);

	/** free allocated strings. The host
	 * calls this for every value returned by
	 * \ref midnam and \ref model.
	 */
	void (*free)(char*);
} LV2_Midnam_Interface;

#endif