From 4a4d0a84bb1b80555052f59c1a4addc870ce5fda Mon Sep 17 00:00:00 2001 From: Bent Bisballe Nyeng Date: Mon, 23 Jan 2012 20:37:20 +0100 Subject: Make plugin store its state. Connect state and GUI (and use GUI) --- lv2/lv2_data_access.h | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 lv2/lv2_data_access.h (limited to 'lv2/lv2_data_access.h') diff --git a/lv2/lv2_data_access.h b/lv2/lv2_data_access.h new file mode 100644 index 0000000..d6403b4 --- /dev/null +++ b/lv2/lv2_data_access.h @@ -0,0 +1,59 @@ +/* lv2_data_access.h - C header file for the LV2 Data Access extension. + * Copyright (C) 2008 Dave Robillard + * + * This header is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License as published + * by the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This header is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public + * License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this header; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place, Suite 330, Boston, MA 01222-1307 USA + */ + +#ifndef LV2_DATA_ACCESS_H +#define LV2_DATA_ACCESS_H + +#define LV2_DATA_ACCESS_URI "http://lv2plug.in/ns/ext/data-access" + + +/** @file + * This header defines the LV2 Extension Data extension with the URI + * . + * + * This extension defines a method for (e.g.) plugin UIs to have (possibly + * marshalled) access to the extension_data function on a plugin instance. + */ + + +/** The data field of the LV2_Feature for this extension. + * + * To support this feature the host must pass an LV2_Feature struct to the + * instantiate method with URI "http://lv2plug.in/ns/ext/data-access" + * and data pointed to an instance of this struct. + */ +typedef struct { + + /** A pointer to a method the UI can call to get data (of a type specified + * by some other extension) from the plugin. + * + * This call never is never guaranteed to return anything, UIs should + * degrade gracefully if direct access to the plugin data is not possible + * (in which case this function will return NULL). + * + * This is for access to large data that can only possibly work if the UI + * and plugin are running in the same process. For all other things, use + * the normal LV2 UI communication system. + */ + const void* (*data_access)(const char* uri); + +} LV2_Extension_Data_Feature; + + +#endif // LV2_DATA_ACCESS_H + -- cgit v1.2.3