From 725d4a404b838da6b67d9da66228a1125bddef57 Mon Sep 17 00:00:00 2001 From: David Robillard Date: Sun, 20 Nov 2011 23:08:57 +0000 Subject: Lay out repository structure to match include and URI structure. Treat lv2core like all the other specifications in gendoc.py. --- ns/ext/files/files.h | 134 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 134 insertions(+) create mode 100644 ns/ext/files/files.h (limited to 'ns/ext/files/files.h') diff --git a/ns/ext/files/files.h b/ns/ext/files/files.h new file mode 100644 index 0000000..623587a --- /dev/null +++ b/ns/ext/files/files.h @@ -0,0 +1,134 @@ +/* + Copyright 2010-2011 David Robillard + + 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. +*/ + +/** + @file files.h + C API for the LV2 Files extension . +*/ + +#ifndef LV2_FILES_H +#define LV2_FILES_H + +#ifdef __cplusplus +extern "C" { +#endif + +#define LV2_FILES_URI "http://lv2plug.in/ns/ext/files" +#define LV2_FILES_PATH_SUPPORT_URI LV2_FILES_URI "#pathSupport" +#define LV2_FILES_NEW_FILE_SUPPORT_URI LV2_FILES_URI "#newFileSupport" + +typedef void* LV2_Files_Host_Data; + +/** + files:pathSupport feature struct. + + To support this feature, the host MUST pass an LV2_Feature struct with @a + URI @ref LV2_FILES_PATH_SUPPORT_URI and @a data pointed to an instance of + this struct. +*/ +typedef struct { + + /** + Opaque host data. + */ + LV2_Files_Host_Data host_data; + + /** + Map an absolute path to an abstract path for use in plugin state. + @param host_data MUST be the @a host_data member of this struct. + @param absolute_path The absolute path of a file. + @return An abstract path suitable for use in plugin state. + + The plugin MUST use this function to map any paths that will be stored + in plugin state. The returned value is an abstract path which MAY not + be an actual file system path; @ref absolute_path MUST be used to map it + to an actual path in order to use the file. + + Hosts MAY map paths in any way (e.g. by creating symbolic links within + the plugin's state directory or storing a list of referenced files for + later export). Plugins MUST NOT make any assumptions about abstract + paths except that they can be mapped to an absolute path using @ref + absolute_path. Particularly when restoring from state, this absolute + path MAY not be the same as the original absolute path, but the host + MUST guarantee it refers to a file with contents equivalent to the + original. + + This function may only be called within the context of + LV2_Persist.save() or LV2_Persist.restore(). The caller is responsible + for freeing the returned value. + */ + char* (*abstract_path)(LV2_Files_Host_Data host_data, + const char* absolute_path); + + /** + Map an abstract path from plugin state to an absolute path. + @param host_data MUST be the @a host_data member of this struct. + @param abstract_path An abstract path (e.g. a path from plugin state). + @return An absolute file system path. + + Since abstract paths are not necessarily actual file paths (or at least + not necessarily absolute paths), this function MUST be used in order to + actually open or otherwise use the file referred to by an abstract path. + + This function may only be called within the context of + LV2_Persist.save() or LV2_Persist.restore(). The caller is responsible + for freeing the returned value. + */ + char* (*absolute_path)(LV2_Files_Host_Data host_data, + const char* abstract_path); + +} LV2_Files_Path_Support; + +/** + files:newFileSupport feature struct. + + To support this feature, the host MUST pass an LV2_Feature struct with @a + URI @ref LV2_FILES_NEW_FILE_SUPPORT_URI and @a data pointed to an instance + of this struct. +*/ +typedef struct { + + /** + Opaque host data. + */ + LV2_Files_Host_Data host_data; + + /** + Return an absolute path the plugin may use to create a new file. + @param host_data MUST be the @a host_data member of this struct. + @param relative_path The relative path of the file. + @return The absolute path to use for the new file. + + The plugin can assume @a relative_path is relative to a namespace + dedicated to that plugin instance; hosts MUST ensure this, e.g. by + giving each plugin instance its own state directory. The returned path + is absolute and thus suitable for creating and using a file, but NOT + suitable for storing in plugin state (it MUST be mapped to an abstract + path using @ref LV2_Files_Path_Support::abstract_path to do so). + + This function may be called from any non-realtime context. The caller + is responsible for freeing the returned value. + */ + char* (*new_file_path)(LV2_Files_Host_Data host_data, + const char* relative_path); + +} LV2_Files_New_File_Support; + +#ifdef __cplusplus +} /* extern "C" */ +#endif + +#endif /* LV2_FILES_H */ -- cgit v1.2.1