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-rw-r--r--ext/reference.lv2/reference.h161
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diff --git a/ext/reference.lv2/reference.h b/ext/reference.lv2/reference.h
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-/*
- Copyright 2008-2011 David Robillard <http://drobilla.net>
-
- 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 reference.h C header for the LV2 Reference extension
- <http://lv2plug.in/ns/ext/reference>.
-*/
-
-#ifndef LV2_REFERENCE_H
-#define LV2_REFERENCE_H
-
-#define LV2_REFERENCE_URI "http://lv2plug.in/ns/ext/reference"
-#define LV2_REFERENCE_BLOB_SUPPORT_URI LV2_REFERENCE_URI "#blobSupport"
-
-#include <stdint.h>
-#include <stddef.h>
-
-#include "lv2/lv2plug.in/ns/ext/atom/atom.h"
-
-/**
- Dynamically Allocated Data.
-
- This is an opaque piece of data of any type, dynamically allocated in memory.
- Unlike an "atom", a "blob" is not necessarily POD. Non-POD data is referred
- to by a "reference (a special case of atom with type 0).
-
- 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 LV2_Atom LV2_Reference;
-
-typedef void* LV2_Blob_Support_Data;
-
-typedef void (*LV2_Blob_Destroy)(LV2_Blob* blob);
-
-/**
- The data field of the LV2_Feature for reference:blobSupport.
-
- A host which supports blobs must pass an LV2_Feature to the plugin's
- instantiate method with 'URI' = "http://lv2plug.in/ns/ext/reference#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.
- */
- 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_Reference
- with type reference:Reference, hence ref_size is a uint16, like
- LV2_Reference.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.
- */
- LV2_Blob (*ref_get)(LV2_Blob_Support_Data data,
- LV2_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.
- */
- void (*ref_copy)(LV2_Blob_Support_Data data,
- LV2_Reference* dst,
- LV2_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 references. 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_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.
- */
- void (*blob_new)(LV2_Blob_Support_Data data,
- LV2_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>.
- */
- 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.
- */
- void* (*blob_data)(LV2_Blob blob);
-
-} LV2_Blob_Support;
-
-#endif /* LV2_REFERENCE_H */