diff options
Diffstat (limited to 'ext/uri-map.lv2/uri-map.h')
| -rw-r--r-- | ext/uri-map.lv2/uri-map.h | 137 |
1 files changed, 72 insertions, 65 deletions
diff --git a/ext/uri-map.lv2/uri-map.h b/ext/uri-map.lv2/uri-map.h index d0d04e4..296095b 100644 --- a/ext/uri-map.lv2/uri-map.h +++ b/ext/uri-map.lv2/uri-map.h @@ -1,33 +1,33 @@ -/* 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 - */ +/* + Copyright (C) 2008-2011 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). - */ +/** + @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 @@ -36,52 +36,59 @@ #include <stdint.h> - -/** Opaque pointer to host data. */ +/** + 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. - */ +/** + URI Map Feature. + + 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. - */ + /** + 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". - */ + /** + 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. Extensions SHOULD NOT define a context + unless there is a specific need to do so, e.g. to restrict the range of + the returned value. + @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 indicates that an ID for that URI + could not be created for whatever reason. Extensions MAY define more + precisely what this means in a certain context, but in general plugins + SHOULD handle this situation as gracefully as possible. However, hosts + SHOULD NOT return 0 from this function in non-exceptional circumstances + (e.g. the URI map SHOULD be dynamic). Hosts that statically support only + a fixed set of URIs should not expect plugins to function correctly. + */ 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 */ - |