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-rw-r--r--ext/atom.lv2/atom.h311
1 files changed, 168 insertions, 143 deletions
diff --git a/ext/atom.lv2/atom.h b/ext/atom.lv2/atom.h
index a15000a..b39844b 100644
--- a/ext/atom.lv2/atom.h
+++ b/ext/atom.lv2/atom.h
@@ -1,30 +1,31 @@
-/* lv2_atom.h - C header file for the LV2 Atom 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 Atom extension <http://lv2plug.in/ns/ext/atom>.
- * This extension defines convenience structs that
- * should match the definition of the built-in types of the atom extension.
- * The layout of atoms in this header must match the description in RDF.
- * The RDF description of an atom type should be considered normative.
- * This header is a non-normative (but hopefully accurate) implementation
- * of that specification.
- */
+/*
+ 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 atom.h C header for the LV2 Atom extension
+ <http://lv2plug.in/ns/ext/atom>.
+
+ This extension defines convenience structs that should match the definition
+ of the built-in types of the atom extension. The layout of atoms in this
+ header must match the description in RDF. The RDF description of an atom
+ type should be considered normative. This header is a non-normative (but
+ hopefully accurate) implementation of that specification.
+*/
#ifndef LV2_ATOM_H
#define LV2_ATOM_H
@@ -39,190 +40,214 @@
#define LV2_ATOM_FROM_EVENT(ev) ((LV2_Atom*)&((LV2_Event*)ev)->type)
-/** An LV2 Atom.
- *
- * An "Atom" is a generic chunk of memory with a given type and size.
- * The type field defines how to interpret an atom.
- *
- * All atoms are by definition Plain Old Data (POD) and may be safely
- * copied (e.g. with memcpy) using the size field, except atoms with type 0.
- * An atom with type 0 is a reference, and may only be used via the functions
- * provided in LV2_Blob_Support (e.g. it MUST NOT be manually copied).
- *
- * Note that an LV2_Atom is the latter two fields of an LV2_Event as defined
- * by the <a href="http://lv2plug.in/ns/ext/event">LV2 events extension</a>.
- * The host MAY marshal an <a href="urn:struct:LV2_Event">LV2_Event</a> to
- * an <a href="urn:struct:LV2_Atom">LV2_Atom</a> by simply pointing to the
- * offset of <code>type</code>. The macro LV2_ATOM_FROM_EVENT is provided
- * in this header for this purpose.
- */
+/**
+ An LV2 Atom.
+
+ An "Atom" is a generic chunk of memory with a given type and size.
+ The type field defines how to interpret an atom.
+
+ All atoms are by definition Plain Old Data (POD) and may be safely copied
+ (e.g. with memcpy) using the size field, except atoms with type 0. An atom
+ with type 0 is a reference, and may only be used via the functions provided
+ in LV2_Blob_Support (e.g. it MUST NOT be manually copied).
+
+ Note that an LV2_Atom is the latter two fields of an LV2_Event as defined by
+ the <a href="http://lv2plug.in/ns/ext/event">LV2 events extension</a>. The
+ host MAY marshal an <a href="urn:struct:LV2_Event">LV2_Event</a> to an <a
+ href="urn:struct:LV2_Atom">LV2_Atom</a> by simply pointing to the offset of
+ <code>type</code>. The macro LV2_ATOM_FROM_EVENT is provided in this header
+ for this purpose.
+*/
typedef struct _LV2_Atom {
- /** The type of this atom. This number is mapped from a URI using
- * the extension <http://lv2plug.in/ns/ext/uri-map>
- * with 'map' = "http://lv2plug.in/ns/ext/atom".
- * Type 0 is a special case which indicates this atom
- * is a reference and MUST NOT be copied manually.
- */
+ /**
+ The type of this atom.
+
+ This number is mapped from a URI using the extension
+ <http://lv2plug.in/ns/ext/uri-map> with 'map' =
+ "http://lv2plug.in/ns/ext/atom". Type 0 is a special case which
+ indicates this atom is a reference and MUST NOT be copied manually.
+ */
uint16_t type;
- /** The size of this atom, not including this header, in bytes. */
+ /**
+ The size of this atom, not including this header, in bytes.
+ */
uint16_t size;
- /** Size bytes of data follow here */
+ /**
+ Size bytes of data follow here.
+ */
uint8_t body[];
} LV2_Atom;
-/** Reference, an LV2_Atom with type 0 */
+/**
+ Reference, an LV2_Atom with type 0.
+*/
typedef LV2_Atom LV2_Atom_Reference;
-/** The body of an atom:String */
+/**
+ The body of an atom:String.
+*/
typedef struct _LV2_Atom_String {
uint32_t lang; /**< The ID of the language of this string */
uint8_t str[]; /**< Null-terminated string data in UTF-8 encoding */
} LV2_Atom_String;
-/** The body of an atom:Vector */
+/**
+ The body of an atom:Vector.
+*/
typedef struct _LV2_Atom_Vector {
uint16_t elem_count; /**< The number of elements in the vector */
uint16_t elem_type; /**< The type of each element in the vector */
uint8_t elems[]; /**< Sequence of element bodies */
} LV2_Atom_Vector;
-/** The body of an atom:Property */
+/**
+ The body of an atom:Property.
+*/
typedef struct _LV2_Atom_Property {
uint32_t key; /**< ID of key (predicate) */
LV2_Atom value; /**< Value (object) */
} LV2_Atom_Property;
-/** The body of an atom:Resource or atom:Blank */
+/**
+ The body of an atom:Resource or atom:Blank.
+*/
typedef struct _LV2_Object {
uint32_t context; /**< ID of context graph, or 0 for the default context */
uint32_t id; /**< ID for atom:Resource or blank ID for atom:Blank */
uint8_t properties[]; /**< Sequence of LV2_Atom_Property */
} LV2_Object;
-
/* Optional Blob Support */
-/** Dynamically Allocated LV2 Blob.
- *
- * This is an opaque blob of data of any type, dynamically allocated in memory.
- * Unlike an LV2_Atom, a blob is not necessarily POD. Plugins MUST only
- * refer to blobs via a Reference (an LV2_Atom with type 0), there is no
- * way for a plugin to directly copy or destroy a Blob.
- *
- * This is a pointer to host data which is opaque to the plugin.
- * Plugins MUST NOT interpret this data in any way, except via host-provided
- * functions in LV2_Blob_Support.
- */
+/**
+ Dynamically Allocated LV2 Blob.
+
+ This is an opaque blob of data of any type, dynamically allocated in memory.
+ Unlike an LV2_Atom, a blob is not necessarily POD. Plugins MUST only refer
+ to blobs via a Reference (an LV2_Atom with type 0), there is no way for a
+ plugin to directly copy or destroy a Blob.
+
+ This is a pointer to host data which is opaque to the plugin. Plugins MUST
+ NOT interpret this data in any way, except via host-provided functions in
+ LV2_Blob_Support.
+*/
typedef void* LV2_Blob;
typedef void* LV2_Blob_Support_Data;
typedef void (*LV2_Blob_Destroy)(LV2_Blob* blob);
-/** The data field of the LV2_Feature for atom:BlobSupport.
- *
- * A host which supports blobs must pass an LV2_Feature to the plugin's
- * instantiate method with 'URI' = "http://lv2plug.in/ns/ext/atom#BlobSupport"
- * and 'data' pointing to an instance of this struct. All fields of this
- * struct MUST be set to non-NULL values by the host, except possibly 'data'.
- */
+/**
+ The data field of the LV2_Feature for atom:BlobSupport.
+
+ A host which supports blobs must pass an LV2_Feature to the plugin's
+ instantiate method with 'URI' = "http://lv2plug.in/ns/ext/atom#BlobSupport"
+ and 'data' pointing to an instance of this struct. All fields of this struct
+ MUST be set to non-NULL values by the host, except possibly 'data'.
+*/
typedef struct {
- /** Pointer to opaque host data.
- *
- * The plugin MUST pass this to any call to functions in this struct.
- * Otherwise, the plugin MUST NOT interpret this value in any way.
- */
+ /**
+ Pointer to opaque host data.
+
+ The plugin MUST pass this to any call to functions in this struct.
+ Otherwise, the plugin MUST NOT interpret this value in any way.
+ */
LV2_Blob_Support_Data data;
- /** The size of a reference, in bytes.
- *
- * This value is provided by the host so plugins can allocate large
- * enough chunks of memory to store references. Note a reference is
- * an LV2_Atom with type atom:Reference, hence ref_size is a
- * uint16, like LV2_Atom.size.
- */
+ /**
+ The size of a reference, in bytes.
+
+ This value is provided by the host so plugins can allocate large enough
+ chunks of memory to store references. Note a reference is an LV2_Atom
+ with type atom:Reference, hence ref_size is a uint16, like
+ LV2_Atom.size.
+ */
uint16_t ref_size;
- /** Return the Blob referred to by @a ref.
- *
- * The returned value MUST NOT be used in any way other than by calling
- * methods defined in LV2_Blob_Support (e.g. it MUST NOT be directly
- * accessed, copied, or destroyed). The actual payload of the blob can
- * be accessed with LV2_Blob_Support.blob_get.
- */
+ /**
+ Return the Blob referred to by @a ref.
+
+ The returned value MUST NOT be used in any way other than by calling
+ methods defined in LV2_Blob_Support (e.g. it MUST NOT be directly
+ accessed, copied, or destroyed). The actual payload of the blob can
+ be accessed with LV2_Blob_Support.blob_get.
+ */
LV2_Blob (*ref_get)(LV2_Blob_Support_Data data,
LV2_Atom_Reference* ref);
- /** Copy a reference.
- * This copies a reference but not the blob it refers to,
- * i.e. after this call @a dst and @a src refer to the same LV2_Blob.
- */
+ /**
+ Copy a reference.
+ This copies a reference but not the blob it refers to,
+ i.e. after this call @a dst and @a src refer to the same LV2_Blob.
+ */
void (*ref_copy)(LV2_Blob_Support_Data data,
LV2_Atom_Reference* dst,
LV2_Atom_Reference* src);
- /** Reset (release) a reference.
- * After this call, @a ref is invalid. Implementations must be sure to
- * call this function when necessary, or memory leaks will result. The
- * specific times this is necessary MUST be defined by any extensions that
- * define a mechanism for transporting atoms. The standard semantics are:
- * <ul><li>Whenever passed a Reference (e.g. via a Port) and run, the
- * plugin owns that reference.</li>
- * <li>The plugin owns any reference it creates (e.g. by using blob_new or
- * ref_copy).</li>
- * <li>For any reference it owns, the plugin MUST either:
- * <ul><li>Copy the reference and store it (to be used in future runs and
- * released later).</li>
- * <li>Copy the reference to an output port exactly once.</li>
- * <li>Release it with ref_reset.</li></ul></li>
- * </ul>
- */
+ /**
+ Reset (release) a reference.
+ After this call, @a ref is invalid. Implementations must be sure to
+ call this function when necessary, or memory leaks will result. The
+ specific times this is necessary MUST be defined by any extensions that
+ define a mechanism for transporting atoms. The standard semantics are:
+ <ul><li>Whenever passed a Reference (e.g. via a Port) and run, the
+ plugin owns that reference.</li>
+ <li>The plugin owns any reference it creates (e.g. by using blob_new or
+ ref_copy).</li>
+ <li>For any reference it owns, the plugin MUST either:
+ <ul><li>Copy the reference and store it (to be used in future runs and
+ released later).</li>
+ <li>Copy the reference to an output port exactly once.</li>
+ <li>Release it with ref_reset.</li></ul></li>
+ </ul>
+ */
void (*ref_reset)(LV2_Blob_Support_Data data,
LV2_Atom_Reference* ref);
- /** Initialize a reference to point to a newly allocated Blob.
- *
- * @param data Must be the data member of this struct.
- * @param ref Pointer to an area of memory at least as large as
- * the ref_size field of this struct. On return, this will
- * be the unique reference to the new blob, which is owned by the
- * caller. Assumed to be uninitialised, i.e. the caller MUST NOT
- * pass a valid reference since this could cause a memory leak.
- * @param destroy Function to destroy this blob. This function
- * MUST clean up any resources contained in the blob, but MUST NOT
- * attempt to free the memory pointed to by its LV2_Blob* parameter
- * (since this is allocated by the host).
- * @param type ID of type of blob to allocate.
- * @param size Size of blob to allocate in bytes.
- */
+ /**
+ Initialize a reference to point to a newly allocated Blob.
+
+ @param data Must be the data member of this struct.
+ @param ref Pointer to an area of memory at least as large as
+ the ref_size field of this struct. On return, this will
+ be the unique reference to the new blob, which is owned by the
+ caller. Assumed to be uninitialised, i.e. the caller MUST NOT
+ pass a valid reference since this could cause a memory leak.
+ @param destroy Function to destroy this blob. This function
+ MUST clean up any resources contained in the blob, but MUST NOT
+ attempt to free the memory pointed to by its LV2_Blob* parameter
+ (since this is allocated by the host).
+ @param type ID of type of blob to allocate.
+ @param size Size of blob to allocate in bytes.
+ */
void (*blob_new)(LV2_Blob_Support_Data data,
LV2_Atom_Reference* ref,
LV2_Blob_Destroy destroy,
uint32_t type,
size_t size);
- /** Get blob's type as an ID.
- *
- * The return value may be any type URI, mapped to an integer with the
- * URI Map extension with <code>context = NULL</code>.
- */
+ /**
+ Get blob's type as an ID.
+
+ The return value may be any type URI, mapped to an integer with the
+ URI Map extension with <code>context = NULL</code>.
+ */
uint32_t (*blob_type)(LV2_Blob blob);
- /** Get blob's body.
- *
- * Returns a pointer to the start of the blob data. The format of this
- * data is defined by the return value of the type method. It MUST NOT
- * be used in any way by code which does not understand that type.
- */
+ /**
+ Get blob's body.
+
+ Returns a pointer to the start of the blob data. The format of this
+ data is defined by the return value of the type method. It MUST NOT
+ be used in any way by code which does not understand that type.
+ */
void* (*blob_data)(LV2_Blob blob);
} LV2_Blob_Support;
-
#endif /* LV2_ATOM_H */
-