mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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b2ee38575d
Original commit message from CVS: Landed the new improved capsnegotiation system. The main idea is to keep track of the possible data types that can pass through a connection. plugins can at any time inspect, adjust and refine these caps. plugins also get notified when something changes to the types so that they can reconfigure themselves. Look at the updated plugins and the soon to be finished doc.
112 lines
3.8 KiB
C
112 lines
3.8 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.h>
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typedef struct _GstProps GstProps;
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typedef enum {
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GST_PROPS_END_ID = 0,
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GST_PROPS_INT_ID,
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GST_PROPS_FLOAT_ID,
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GST_PROPS_FOURCC_ID,
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GST_PROPS_BOOL_ID,
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GST_PROPS_STRING_ID,
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GST_PROPS_VAR_ID, /* after this marker start the variable properties */
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GST_PROPS_LIST_ID,
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GST_PROPS_FLOAT_RANGE_ID,
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GST_PROPS_INT_RANGE_ID,
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GST_PROPS_LAST_ID = GST_PROPS_END_ID + 16,
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} GstPropsId;
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#define GST_MAKE_FOURCC(a,b,c,d) ((a)|(b)<<8|(c)<<16|(d)<<24)
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#define GST_STR_FOURCC(f) (((f)[0])|((f)[1]<<8)|((f)[2]<<16)|((f)[3]<<24))
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#define GST_PROPS_LIST(a...) GST_PROPS_LIST_ID,##a,NULL
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#define GST_PROPS_INT(a) GST_PROPS_INT_ID,(a)
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#define GST_PROPS_INT_RANGE(a,b) GST_PROPS_INT_RANGE_ID,(a),(b)
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#define GST_PROPS_FLOAT(a) GST_PROPS_FLOAT_ID,(a)
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#define GST_PROPS_FLOAT_RANGE(a,b) GST_PROPS_FLOAT_RANGE_ID,(a),(b)
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#define GST_PROPS_FOURCC(a) GST_PROPS_FOURCC_ID,(a)
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#define GST_PROPS_BOOLEAN(a) GST_PROPS_BOOL_ID,(a)
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#define GST_PROPS_STRING(a) GST_PROPS_STRING_ID,(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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struct _GstProps {
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gint refcount;
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GMutex *lock;
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gboolean fixed;
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GList *properties; /* real properties 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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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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void gst_props_unref (GstProps *props);
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void gst_props_ref (GstProps *props);
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void gst_props_destroy (GstProps *props);
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void gst_props_debug (GstProps *props);
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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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GstProps* gst_props_merge (GstProps *props, GstProps *tomerge);
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gboolean gst_props_check_compatibility (GstProps *fromprops, GstProps *toprops);
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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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GstProps* gst_props_set (GstProps *props, const gchar *name, ...);
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gboolean gst_props_has_property (GstProps *props, const gchar *name);
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gint gst_props_get_int (GstProps *props, const gchar *name);
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gfloat gst_props_get_float (GstProps *props, const gchar *name);
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gulong gst_props_get_fourcc_int (GstProps *props, const gchar *name);
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gboolean gst_props_get_boolean (GstProps *props, const gchar *name);
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const gchar* gst_props_get_string (GstProps *props, const gchar *name);
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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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#endif /* __GST_PROPS_H__ */
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