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Diffstat (limited to 'slv2/pluginlist.h')
| -rw-r--r-- | slv2/pluginlist.h | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/slv2/pluginlist.h b/slv2/pluginlist.h new file mode 100644 index 0000000..d29a56d --- /dev/null +++ b/slv2/pluginlist.h @@ -0,0 +1,159 @@ +/* LibSLV2 + * Copyright (C) 2006 Dave Robillard <drobilla@connect.carleton.ca> + * + * This library is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * This library 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 General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef __SLV2_PLUGINLIST_H__ +#define __SLV2_PLUGINLIST_H__ + +#ifdef __cplusplus +extern "C" { +#endif + + +typedef struct _PluginList* SLV2List; + + +/** \defgroup lists Plugin lists + * + * These functions are for locating plugins installed on the system. + * + * Normal hosts which just want to easily load plugins by URI are strongly + * recommended to simply find all installed plugins with + * \ref slv2_list_load_all rather than find and load bundles manually. + * + * Functions are provided for hosts that wish to access bundles explicitly and + * individually for some reason, as well as make custom lists of plugins from + * a selection of bundles. This is mostly intended for hosts which are + * tied to a specific (bundled with the application) bundle. + * + * @{ + */ + + +/** Create a new, empty plugin list. + * + * Returned object must be freed with slv2_list_free. + */ +SLV2List +slv2_list_new(); + + +/** Free a plugin list. + * + * Note that all plugins in the list (eg those returned by the get_plugin + * functions) will be deleted as well. It is expected that hosts will + * keep the plugin list allocated until they are done with their plugins. + * If you want to keep a plugin around, but free the list it came from, you + * will have to copy it with slv2_plugin_duplicate(). + * + * \a list is invalid after this call (though it may be used again after a + * "list = slv2_list_new()") + */ +void +slv2_list_free(SLV2List list); + + +/** Add all plugins installed on the system to \a list. + * + * This is the recommended way for hosts to access plugins. It finds all + * plugins on the system using the recommended mechanism. At the time, this + * is by searching the path defined in the environment variable LADSPA2_PATH, + * though this is subject to change in the future. Future versions may, for + * example, allow users to specify a plugin whitelist of plugins they would + * like to be visible in apps (or conversely a blacklist of plugins they do + * not wish to use). + * + * Use of any of the other functions for locating plugins is highly + * discouraged without specific reason to do so. Use this one. + */ +void +slv2_list_load_all(SLV2List list); + + +/** Add all plugins found in \a search_path to \a list. + * + * If \a search_path is NULL, \a list will be unmodified. + * + * Use of this function is not recommended. Use \ref slv2_list_load_all. + * + * Returned value must be cleaned up by slv2list_free. + */ +void +slv2_list_load_path(SLV2List list, + const char* search_path); + + +/** Add all plugins found in the bundle at \a bundle_base_url to \a list. + * + * \arg bundle_base_url is a fully qualified path to the bundle directory, eg. + * "file:///usr/lib/lv2/someBundle" + * + * Use of this function is <b>strongly</b> discouraged, hosts should not attach + * any significance to bundle paths as there are no guarantees they will + * remain consistent whatsoever. This function should only be used by apps + * which ship with a special bundle (which it knows exists at some path). + * It is <b>not</b> to be used by normal hosts that want to load system + * installed plugins. Use \ref slv2_list_load_all. + */ +void +slv2_list_load_bundle(SLV2List list, + const unsigned char* bundle_base_url); + + +/** Get the number of plugins in the list. + */ +unsigned long +slv2_list_get_length(const SLV2List list); + + +/** Get a plugin from the list by URI. + * + * Return value is shared (stored in \a list) and must not be freed or + * modified by the caller in any way. + * + * \return NULL if plugin with \a url not found in \a list. + */ +const SLV2Plugin* +slv2_list_get_plugin_by_uri(const SLV2List list, + const unsigned char* uri); + + +/** Get a plugin from the list by index. + * + * \a index has no significance. Any \a index not less than + * slv2list_get_length(list) will return NULL. * All plugins in a list can + * thus be easily enumerated by repeated calls to this function starting + * with \a index 0. + * + * Return value is shared (stored in \a list) and must not be freed or + * modified by the caller in any way. + * + * \return NULL if \a index out of range. + */ +const SLV2Plugin* +slv2_list_get_plugin_by_index(const SLV2List list, + unsigned long index); + + +/** @} */ + +#ifdef __cplusplus +} +#endif + +#endif /* __SLV2_PLUGINLIST_H__ */ + |