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Diffstat (limited to 'lv2/lv2_uri_map.h')
-rw-r--r-- | lv2/lv2_uri_map.h | 86 |
1 files changed, 0 insertions, 86 deletions
diff --git a/lv2/lv2_uri_map.h b/lv2/lv2_uri_map.h deleted file mode 100644 index 93571d5..0000000 --- a/lv2/lv2_uri_map.h +++ /dev/null @@ -1,86 +0,0 @@ -/* lv2_uri_map.h - C header file for the LV2 URI Map extension. - * - * Copyright (C) 2008-2009 David Robillard <http://drobilla.net> - * - * 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 - */ - -/** @file - * C header for the LV2 URI Map extension <http://lv2plug.in/ns/ext/uri-map>. - * - * This extension defines a simple mechanism for plugins to map URIs to - * integers, usually for performance reasons (e.g. processing events - * typed by URIs in real time). The expected use case is for plugins to - * map URIs to integers for things they 'understand' at instantiation time, - * and store those values for use in the audio thread without doing any string - * comparison. This allows the extensibility of RDF with the performance of - * integers (or centrally defined enumerations). - */ - -#ifndef LV2_URI_MAP_H -#define LV2_URI_MAP_H - -#define LV2_URI_MAP_URI "http://lv2plug.in/ns/ext/uri-map" - -#include <stdint.h> - - -/** Opaque pointer to host data. */ -typedef void* LV2_URI_Map_Callback_Data; - - -/** The data field of the LV2_Feature for this extension. - * - * To support this feature the host must pass an LV2_Feature struct to the - * plugin's instantiate method with URI "http://lv2plug.in/ns/ext/uri-map" - * and data pointed to an instance of this struct. - */ -typedef struct { - - /** Opaque pointer to host data. - * - * The plugin MUST pass this to any call to functions in this struct. - * Otherwise, it must not be interpreted in any way. - */ - LV2_URI_Map_Callback_Data callback_data; - - /** Get the numeric ID of a URI from the host. - * - * @param callback_data Must be the callback_data member of this struct. - * @param map The 'context' of this URI. Certain extensions may define a - * URI that must be passed here with certain restrictions on the - * return value (e.g. limited range). This value may be NULL if - * the plugin needs an ID for a URI in general. - * @param uri The URI to be mapped to an integer ID. - * - * This function is referentially transparent - any number of calls with - * the same arguments is guaranteed to return the same value over the life - * of a plugin instance (though the same URI may return different values - * with a different map parameter). However, this function is not - * necessarily very fast: plugins should cache any IDs they might need in - * performance critical situations. - * The return value 0 is reserved and means an ID for that URI could not - * be created for whatever reason. Extensions may define more precisely - * what this means, but in general plugins should gracefully handle 0 - * and consider whatever they wanted the URI for "unsupported". - */ - uint32_t (*uri_to_id)(LV2_URI_Map_Callback_Data callback_data, - const char* map, - const char* uri); - -} LV2_URI_Map_Feature; - - -#endif /* LV2_URI_MAP_H */ |