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201 lines
7.5 KiB
C
201 lines
7.5 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* gstprops.h: Header for properties subsystem
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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_PROPS_H__
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#define __GST_PROPS_H__
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#include <gst/gstconfig.h>
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#include <glib-object.h>
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G_BEGIN_DECLS
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typedef struct _GstProps GstProps;
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extern GType _gst_props_type;
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#define GST_PROPS_TRACE_NAME "GstProps"
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#define GST_TYPE_PROPS (_gst_props_type)
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typedef enum {
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GST_PROPS_END_TYPE = 0,
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GST_PROPS_INVALID_TYPE,
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GST_PROPS_INT_TYPE,
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GST_PROPS_FLOAT_TYPE,
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GST_PROPS_FOURCC_TYPE,
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GST_PROPS_BOOLEAN_TYPE,
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GST_PROPS_STRING_TYPE,
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GST_PROPS_VAR_TYPE, /* after this marker start the variable properties */
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GST_PROPS_LIST_TYPE,
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GST_PROPS_GLIST_TYPE,
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GST_PROPS_FLOAT_RANGE_TYPE,
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GST_PROPS_INT_RANGE_TYPE,
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GST_PROPS_LAST_TYPE = GST_PROPS_END_TYPE + 16
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} GstPropsType;
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#define GST_MAKE_FOURCC(a,b,c,d) (guint32)((a)|(b)<<8|(c)<<16|(d)<<24)
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#define GST_STR_FOURCC(f) (guint32)(((f)[0])|((f)[1]<<8)|((f)[2]<<16)|((f)[3]<<24))
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#define GST_FOURCC_FORMAT "%c%c%c%c"
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#define GST_FOURCC_ARGS(fourcc) \
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((GUINT32_FROM_LE(fourcc)>>24)&0xff), \
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((GUINT32_FROM_LE(fourcc)>>16)&0xff), \
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((GUINT32_FROM_LE(fourcc)>>8)&0xff), \
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(GUINT32_FROM_LE(fourcc)&0xff)
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#ifdef G_HAVE_ISO_VARARGS
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# define GST_PROPS_LIST(...) GST_PROPS_LIST_TYPE,__VA_ARGS__,NULL
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#elif defined(G_HAVE_GNUC_VARARGS)
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# define GST_PROPS_LIST(a...) GST_PROPS_LIST_TYPE,a,NULL
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#endif
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#define GST_PROPS_GLIST(a) GST_PROPS_GLIST_TYPE,(a)
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#define GST_PROPS_INT(a) GST_PROPS_INT_TYPE,(a)
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#define GST_PROPS_INT_RANGE(a,b) GST_PROPS_INT_RANGE_TYPE,(a),(b)
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#define GST_PROPS_FLOAT(a) GST_PROPS_FLOAT_TYPE,((float)(a))
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#define GST_PROPS_FLOAT_RANGE(a,b) GST_PROPS_FLOAT_RANGE_TYPE,((float)(a)),((float)(b))
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#define GST_PROPS_FOURCC(a) GST_PROPS_FOURCC_TYPE,(a)
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#define GST_PROPS_BOOLEAN(a) GST_PROPS_BOOLEAN_TYPE,(a)
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#define GST_PROPS_STRING(a) GST_PROPS_STRING_TYPE,(a)
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#define GST_PROPS_INT_POSITIVE GST_PROPS_INT_RANGE(0,G_MAXINT)
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#define GST_PROPS_INT_NEGATIVE GST_PROPS_INT_RANGE(G_MININT,0)
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#define GST_PROPS_INT_ANY GST_PROPS_INT_RANGE(G_MININT,G_MAXINT)
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/* propsentries are private */
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typedef struct _GstPropsEntry GstPropsEntry;
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extern GType _gst_props_entry_type;
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#define GST_PROPS_ENTRY_TRACE_NAME "GstPropsEntry"
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#define GST_TYPE_PROPS_ENTRY (_gst_props_entry_type)
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typedef enum {
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GST_PROPS_FIXED = (1 << 0), /* props has no variable entries */
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GST_PROPS_FLOATING = (1 << 1) /* props is floating */
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} GstPropsFlags;
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#define GST_PROPS_FLAGS(props) ((props)->flags)
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#define GST_PROPS_FLAG_IS_SET(props,flag) (GST_PROPS_FLAGS (props) & flag)
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#define GST_PROPS_FLAG_SET(props,flag) (GST_PROPS_FLAGS (props) |= (flag))
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#define GST_PROPS_FLAG_UNSET(props,flag) (GST_PROPS_FLAGS (props) &= ~(flag))
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#define GST_PROPS_REFCOUNT(props) ((props)->refcount)
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#define GST_PROPS_PROPERTIES(props) ((props)->properties)
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#define GST_PROPS_IS_FIXED(props) (GST_PROPS_FLAGS (props) & GST_PROPS_FIXED)
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#define GST_PROPS_IS_FLOATING(props) (GST_PROPS_FLAGS (props) & GST_PROPS_FLOATING)
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struct _GstProps {
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gint refcount;
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gint flags;
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GList *properties; /* real property entries for this property */
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};
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/* initialize the subsystem */
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void _gst_props_initialize (void);
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/* creating new properties */
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GType gst_props_get_type (void);
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GstProps* gst_props_new (const gchar *firstname, ...);
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GstProps* gst_props_newv (const gchar *firstname, va_list var_args);
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GstProps* gst_props_empty_new (void);
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/* replace pointer to props, doing proper refcounting */
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void gst_props_replace (GstProps **oldprops, GstProps *newprops);
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void gst_props_replace_sink (GstProps **oldprops, GstProps *newprops);
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/* lifecycle management */
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GstProps* gst_props_unref (GstProps *props);
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GstProps* gst_props_ref (GstProps *props);
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void gst_props_sink (GstProps *props);
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void gst_props_destroy (GstProps *props);
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/* dump property debug info to the log */
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void gst_props_debug (GstProps *props);
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/* copy */
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GstProps* gst_props_copy (GstProps *props);
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GstProps* gst_props_copy_on_write (GstProps *props);
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/* check if fromprops is subset of toprops */
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gboolean gst_props_check_compatibility (GstProps *fromprops, GstProps *toprops);
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/* operation on props */
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GstProps* gst_props_merge (GstProps *props, GstProps *tomerge);
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GstProps* gst_props_intersect (GstProps *props1, GstProps *props2);
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GList* gst_props_normalize (GstProps *props);
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/* modify entries */
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GstProps* gst_props_set (GstProps *props, const gchar *name, ...);
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gboolean gst_props_get (GstProps *props, gchar *first_name, ...);
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gboolean gst_props_get_safe (GstProps *props, gchar *first_name, ...);
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/* query entries */
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gboolean gst_props_has_property (GstProps *props, const gchar *name);
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gboolean gst_props_has_property_typed (GstProps *props, const gchar *name, GstPropsType type);
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gboolean gst_props_has_fixed_property (GstProps *props, const gchar *name);
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/* add/get entries */
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const GstPropsEntry* gst_props_get_entry (GstProps *props, const gchar *name);
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void gst_props_add_entry (GstProps *props, GstPropsEntry *entry);
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void gst_props_remove_entry (GstProps *props, GstPropsEntry *entry);
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void gst_props_remove_entry_by_name (GstProps *props, const gchar *name);
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/* working with props entries */
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GType gst_props_entry_get_type (void);
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GstPropsEntry* gst_props_entry_new (const gchar *name, ...);
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void gst_props_entry_destroy (GstPropsEntry *entry);
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GstPropsEntry* gst_props_entry_copy (const GstPropsEntry *entry);
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GstPropsType gst_props_entry_get_props_type (const GstPropsEntry *entry);
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const gchar* gst_props_entry_get_name (const GstPropsEntry *entry);
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gboolean gst_props_entry_is_fixed (const GstPropsEntry *entry);
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gboolean gst_props_entry_get (const GstPropsEntry *entry, ...);
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gboolean gst_props_entry_get_int (const GstPropsEntry *entry, gint *val);
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gboolean gst_props_entry_get_float (const GstPropsEntry *entry, gfloat *val);
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gboolean gst_props_entry_get_fourcc_int (const GstPropsEntry *entry, guint32 *val);
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gboolean gst_props_entry_get_boolean (const GstPropsEntry *entry, gboolean *val);
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gboolean gst_props_entry_get_string (const GstPropsEntry *entry, const gchar **val);
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gboolean gst_props_entry_get_int_range (const GstPropsEntry *entry, gint *min, gint *max);
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gboolean gst_props_entry_get_float_range (const GstPropsEntry *entry, gfloat *min, gfloat *max);
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gboolean gst_props_entry_get_list (const GstPropsEntry *entry, const GList **val);
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#ifndef GST_DISABLE_LOADSAVE
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xmlNodePtr gst_props_save_thyself (GstProps *props, xmlNodePtr parent);
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GstProps* gst_props_load_thyself (xmlNodePtr parent);
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#endif
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G_END_DECLS
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#endif /* __GST_PROPS_H__ */
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