2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wim.taymans@chello.be>
5 * gstdata.h: Header for GstData objects (used for data passing)
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
24 #ifndef __GST_DATA_H__
25 #define __GST_DATA_H__
27 #include <glib-object.h>
28 #include <gst/gstatomic.h>
29 #include <gst/gsttypes.h>
34 #define GST_DATA(data) ((GstData*)(data))
35 #define GST_DATA_TYPE(data) (GST_DATA(data)->type)
38 #define GST_DATA_FLAGS(data) (GST_DATA(data)->flags)
39 #define GST_DATA_FLAG_SHIFT(flag) (1<<(flag))
40 #define GST_DATA_FLAG_IS_SET(data,flag) (GST_DATA_FLAGS(data) & (1<<(flag)))
41 #define GST_DATA_FLAG_SET(data,flag) G_STMT_START{ (GST_DATA_FLAGS(data) |= (1<<(flag))); }G_STMT_END
42 #define GST_DATA_FLAG_UNSET(data,flag) G_STMT_START{ (GST_DATA_FLAGS(data) &= ~(1<<(flag))); }G_STMT_END
44 /* Macros for the GType */
45 #define GST_TYPE_DATA (gst_data_get_type ())
47 typedef struct _GstData GstData;
49 typedef void (*GstDataFreeFunction) (GstData *data);
50 typedef GstData* (*GstDataCopyFunction) (const GstData *data);
54 GST_DATA_READONLY = 1,
57 GST_DATA_FLAG_LAST = 8
61 #define GST_DATA_REFCOUNT(data) ((GST_DATA(data))->refcount)
62 #define GST_DATA_REFCOUNT_VALUE(data) (gst_atomic_int_read (&(GST_DATA(data))->refcount))
64 /* copy/free functions */
65 #define GST_DATA_COPY_FUNC(data) (GST_DATA(data)->copy)
66 #define GST_DATA_FREE_FUNC(data) (GST_DATA(data)->free)
73 GstAtomicInt refcount;
77 /* utility function pointers, can override default */
78 GstDataFreeFunction free; /* free the data */
79 GstDataCopyFunction copy; /* copy the data */
81 gpointer _gst_reserved[GST_PADDING];
84 /* function used by subclasses only */
85 void gst_data_init (GstData *data, GType type, guint16 flags,
86 GstDataFreeFunction free,
87 GstDataCopyFunction copy);
88 void gst_data_dispose (GstData *data);
89 void gst_data_copy_into (const GstData *data, GstData *target);
91 /* basic operations on data */
92 GstData* gst_data_copy (const GstData *data);
93 gboolean gst_data_is_writable (GstData *data);
94 GstData* gst_data_copy_on_write (GstData *data);
95 void gst_data_free (GstData *data);
97 /* reference counting */
98 GstData* gst_data_ref (GstData* data);
99 GstData* gst_data_ref_by_count (GstData* data, gint count);
100 void gst_data_unref (GstData* data);
102 /* GType for GstData */
103 GType gst_data_get_type (void) G_GNUC_CONST;
107 #endif /* __GST_DATA_H__ */