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100 lines
3.2 KiB
C
100 lines
3.2 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wim.taymans@chello.be>
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*
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* gstdata.h: Header for GstData objects (used for data passing)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_DATA_H__
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#define __GST_DATA_H__
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#include <glib-object.h>
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#include <gst/gstatomic.h>
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G_BEGIN_DECLS
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/* type */
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#define GST_DATA(data) ((GstData*)(data))
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#define GST_DATA_TYPE(data) (GST_DATA(data)->type)
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/* flags */
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#define GST_DATA_FLAGS(data) (GST_DATA(data)->flags)
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#define GST_DATA_FLAG_SHIFT(flag) (1<<(flag))
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#define GST_DATA_FLAG_IS_SET(data,flag) (GST_DATA_FLAGS(data) & (1<<(flag)))
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#define GST_DATA_FLAG_SET(data,flag) G_STMT_START{ (GST_DATA_FLAGS(data) |= (1<<(flag))); }G_STMT_END
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#define GST_DATA_FLAG_UNSET(data,flag) G_STMT_START{ (GST_DATA_FLAGS(data) &= ~(1<<(flag))); }G_STMT_END
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typedef struct _GstData GstData;
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typedef void (*GstDataFreeFunction) (GstData *data);
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typedef GstData* (*GstDataCopyFunction) (const GstData *data);
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typedef enum
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{
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GST_DATA_READONLY = 1,
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/* insert more */
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GST_DATA_FLAG_LAST = 8
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} GstDataFlags;
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#define GST_DATA_IS_READONLY(data) (GST_DATA_FLAG_IS_SET((data), GST_DATA_READONLY))
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/* refcount */
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#define GST_DATA_REFCOUNT(data) ((GST_DATA(data))->refcount)
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#define GST_DATA_REFCOUNT_VALUE(data) (GST_ATOMIC_INT_VALUE((&GST_DATA_REFCOUNT (data))))
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#define GST_DATA_REFCOUNT_READ(data,value) (GST_ATOMIC_INT_READ(&(GST_DATA_REFCOUNT (data)),value)
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/* copy/free functions */
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#define GST_DATA_COPY_FUNC(data) (GST_DATA(data)->copy)
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#define GST_DATA_FREE_FUNC(data) (GST_DATA(data)->free)
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struct _GstData {
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GType type;
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/* refcounting */
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GstAtomicInt refcount;
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guint16 flags;
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/* utility function pointers, can override default */
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GstDataFreeFunction free; /* free the data */
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GstDataCopyFunction copy; /* copy the data */
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};
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/* function used by subclasses only */
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void gst_data_init (GstData *data, GType type, guint16 flags,
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GstDataFreeFunction free,
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GstDataCopyFunction copy);
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void gst_data_dispose (GstData *data);
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void gst_data_copy_into (const GstData *data, GstData *target);
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/* basic operations on data */
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GstData* gst_data_copy (const GstData *data);
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GstData* gst_data_copy_on_write (GstData *data);
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void gst_data_free (GstData *data);
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/* reference counting */
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GstData* gst_data_ref (GstData* data);
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GstData* gst_data_ref_by_count (GstData* data, gint count);
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void gst_data_unref (GstData* data);
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G_END_DECLS
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#endif /* __GST_DATA_H__ */
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