gstreamer/gst/gstprops.h

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstprops.h: Header for properties subsystem
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_PROPS_H__
#define __GST_PROPS_H__
#include <gst/gstconfig.h>
#include <glib-object.h>
G_BEGIN_DECLS
typedef struct _GstProps GstProps;
extern GType _gst_props_type;
#define GST_TYPE_PROPS (_gst_props_type)
typedef enum {
GST_PROPS_END_TYPE = 0,
GST_PROPS_INVALID_TYPE,
GST_PROPS_INT_TYPE,
GST_PROPS_FLOAT_TYPE,
GST_PROPS_FOURCC_TYPE,
GST_PROPS_BOOLEAN_TYPE,
GST_PROPS_STRING_TYPE,
GST_PROPS_VAR_TYPE, /* after this marker start the variable properties */
GST_PROPS_LIST_TYPE,
GST_PROPS_GLIST_TYPE,
GST_PROPS_FLOAT_RANGE_TYPE,
GST_PROPS_INT_RANGE_TYPE,
GST_PROPS_LAST_TYPE = GST_PROPS_END_TYPE + 16
} GstPropsType;
#define GST_MAKE_FOURCC(a,b,c,d) (guint32)((a)|(b)<<8|(c)<<16|(d)<<24)
#define GST_STR_FOURCC(f) (guint32)(((f)[0])|((f)[1]<<8)|((f)[2]<<16)|((f)[3]<<24))
#ifdef G_HAVE_ISO_VARARGS
# define GST_PROPS_LIST(...) GST_PROPS_LIST_TYPE,__VA_ARGS__,NULL
#elif defined(G_HAVE_GNUC_VARARGS)
# define GST_PROPS_LIST(a...) GST_PROPS_LIST_TYPE,a,NULL
#endif
#define GST_PROPS_GLIST(a) GST_PROPS_GLIST_TYPE,(a)
#define GST_PROPS_INT(a) GST_PROPS_INT_TYPE,(a)
#define GST_PROPS_INT_RANGE(a,b) GST_PROPS_INT_RANGE_TYPE,(a),(b)
#define GST_PROPS_FLOAT(a) GST_PROPS_FLOAT_TYPE,((float)(a))
#define GST_PROPS_FLOAT_RANGE(a,b) GST_PROPS_FLOAT_RANGE_TYPE,((float)(a)),((float)(b))
#define GST_PROPS_FOURCC(a) GST_PROPS_FOURCC_TYPE,(a)
#define GST_PROPS_BOOLEAN(a) GST_PROPS_BOOLEAN_TYPE,(a)
#define GST_PROPS_STRING(a) GST_PROPS_STRING_TYPE,(a)
#define GST_PROPS_INT_POSITIVE GST_PROPS_INT_RANGE(0,G_MAXINT)
#define GST_PROPS_INT_NEGATIVE GST_PROPS_INT_RANGE(G_MININT,0)
#define GST_PROPS_INT_ANY GST_PROPS_INT_RANGE(G_MININT,G_MAXINT)
typedef struct _GstPropsEntry GstPropsEntry;
struct _GstProps {
gint refcount;
gboolean fixed;
GList *properties; /* real properties for this property */
};
/* initialize the subsystem */
void _gst_props_initialize (void);
GstProps* gst_props_new (const gchar *firstname, ...);
GstProps* gst_props_newv (const gchar *firstname, va_list var_args);
GstProps* gst_props_empty_new (void);
void gst_props_unref (GstProps *props);
void gst_props_ref (GstProps *props);
void gst_props_destroy (GstProps *props);
void gst_props_debug (GstProps *props);
GstProps* gst_props_copy (GstProps *props);
GstProps* gst_props_copy_on_write (GstProps *props);
GstProps* gst_props_merge (GstProps *props, GstProps *tomerge);
gboolean gst_props_check_compatibility (GstProps *fromprops, GstProps *toprops);
GstProps* gst_props_intersect (GstProps *props1, GstProps *props2);
GList* gst_props_normalize (GstProps *props);
GstProps* gst_props_set (GstProps *props, const gchar *name, ...);
gboolean gst_props_get (GstProps *props, gchar *first_name, ...);
gboolean gst_props_get_safe (GstProps *props, gchar *first_name, ...);
gboolean gst_props_has_property (GstProps *props, const gchar *name);
gboolean gst_props_has_property_typed (GstProps *props, const gchar *name, GstPropsType type);
gboolean gst_props_has_fixed_property (GstProps *props, const gchar *name);
const GstPropsEntry* gst_props_get_entry (GstProps *props, const gchar *name);
void gst_props_add_entry (GstProps *props, GstPropsEntry *entry);
/* working with props entries */
GstPropsEntry* gst_props_entry_new (const gchar *name, ...);
GstPropsType gst_props_entry_get_type (const GstPropsEntry *entry);
const gchar* gst_props_entry_get_name (const GstPropsEntry *entry);
gboolean gst_props_entry_is_fixed (const GstPropsEntry *entry);
gboolean gst_props_entry_get (const GstPropsEntry *entry, ...);
gboolean gst_props_entry_get_int (const GstPropsEntry *entry, gint *val);
gboolean gst_props_entry_get_float (const GstPropsEntry *entry, gfloat *val);
gboolean gst_props_entry_get_fourcc_int (const GstPropsEntry *entry, guint32 *val);
gboolean gst_props_entry_get_boolean (const GstPropsEntry *entry, gboolean *val);
gboolean gst_props_entry_get_string (const GstPropsEntry *entry, const gchar **val);
gboolean gst_props_entry_get_int_range (const GstPropsEntry *entry, gint *min, gint *max);
gboolean gst_props_entry_get_float_range (const GstPropsEntry *entry, gfloat *min, gfloat *max);
gboolean gst_props_entry_get_list (const GstPropsEntry *entry, const GList **val);
#ifndef GST_DISABLE_LOADSAVE
xmlNodePtr gst_props_save_thyself (GstProps *props, xmlNodePtr parent);
GstProps* gst_props_load_thyself (xmlNodePtr parent);
#endif
G_END_DECLS
#endif /* __GST_PROPS_H__ */