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205 lines
7.6 KiB
C
205 lines
7.6 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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* gstcaps.h: Header for caps 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_CAPS_H__
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#define __GST_CAPS_H__
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#include <gst/gstprops.h>
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G_BEGIN_DECLS
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typedef struct _GstCaps GstCaps;
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#define GST_CAPS_TRACE_NAME "GstCaps"
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extern GType _gst_caps_type;
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#define GST_TYPE_CAPS (_gst_caps_type)
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typedef enum {
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GST_CAPS_UNUSED = (1 << 0), /* unused flag */
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GST_CAPS_FLOATING = (1 << 1) /* caps is floating */
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} GstCapsFlags;
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#define GST_CAPS(caps) ((GstCaps *)(caps))
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#define GST_CAPS_FLAGS(caps) ((caps)->flags)
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#define GST_CAPS_FLAG_IS_SET(caps,flag) (GST_CAPS_FLAGS (caps) & (flag))
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#define GST_CAPS_FLAG_SET(caps,flag) (GST_CAPS_FLAGS (caps) |= (flag))
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#define GST_CAPS_FLAG_UNSET(caps,flag) (GST_CAPS_FLAGS (caps) &= ~(flag))
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#define GST_CAPS_REFCOUNT(caps) ((caps)->refcount)
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#define GST_CAPS_PROPERTIES(caps) ((caps)->properties)
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#define GST_CAPS_NEXT(caps) ((caps)->next)
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#define GST_CAPS_IS_FIXED(caps) (((caps)->properties == NULL) || \
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(GST_PROPS_IS_FIXED ((caps)->properties)))
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#define GST_CAPS_IS_FLOATING(caps) (GST_CAPS_FLAG_IS_SET ((caps), GST_CAPS_FLOATING))
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#define GST_CAPS_IS_CHAINED(caps) (GST_CAPS_NEXT (caps) != NULL)
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#define GST_CAPS_NONE NULL
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#define GST_CAPS_ANY (gst_caps_get_any())
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struct _GstCaps {
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/* --- public --- */
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gchar *name; /* the name of this caps */
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guint16 id; /* type id (major type) representing
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the mime type, it's stored as a GQuark
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for speed/space reasons */
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guint16 flags; /* flags */
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guint refcount;
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GstProps *properties; /* properties for this capability */
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GstCaps *next; /* not with a GList for efficiency */
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};
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/* factory macros which make it easier for plugins to instantiate */
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#ifdef G_HAVE_ISO_VARARGS
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#define GST_CAPS_NEW(name, type, ...) \
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gst_caps_new ( \
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name, \
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type, \
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gst_props_new ( \
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__VA_ARGS__, \
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NULL))
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#define GST_CAPS_FACTORY(factoryname, ...) \
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static GstCaps* \
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factoryname (void) \
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{ \
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static GstCaps *caps = NULL; \
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if (!caps) { \
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caps = gst_caps_chain (__VA_ARGS__, NULL); \
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} \
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return gst_caps_ref(caps); \
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}
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#elif defined(G_HAVE_GNUC_VARARGS)
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#define GST_CAPS_NEW(name, type, a...) \
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gst_caps_new ( \
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name, \
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type, \
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gst_props_new ( \
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a, \
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NULL))
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#define GST_CAPS_FACTORY(factoryname, a...) \
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static GstCaps* \
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factoryname (void) \
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{ \
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static GstCaps *caps = NULL; \
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if (!caps) { \
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caps = gst_caps_chain (a, NULL); \
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} \
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return gst_caps_ref(caps); \
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}
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#endif
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/* get caps from a factory */
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#define GST_CAPS_GET(fact) (fact)()
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/* initialize the subsystem */
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void _gst_caps_initialize (void);
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/* creating new caps */
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GType gst_caps_get_type (void);
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GstCaps* gst_caps_new (const gchar *name, const gchar *mime, GstProps *props);
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GstCaps* gst_caps_new_id (const gchar *name, const guint16 id, GstProps *props);
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GstCaps* gst_caps_get_any (void);
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/* replace pointer to caps, doing proper refcounting */
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void gst_caps_replace (GstCaps **oldcaps, GstCaps *newcaps);
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void gst_caps_replace_sink (GstCaps **oldcaps, GstCaps *newcaps);
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/* caps lifecycle control */
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GstCaps* gst_caps_unref (GstCaps *caps);
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GstCaps* gst_caps_ref (GstCaps *caps);
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void gst_caps_sink (GstCaps *caps);
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/* write debug lines to the log */
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void gst_caps_debug (GstCaps *caps, const gchar *label);
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/* copy caps */
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GstCaps* gst_caps_copy (GstCaps *caps);
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GstCaps* gst_caps_copy_1 (GstCaps *caps);
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GstCaps* gst_caps_copy_on_write (GstCaps *caps);
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const gchar* gst_caps_get_name (GstCaps *caps);
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void gst_caps_set_name (GstCaps *caps, const gchar *name);
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const gchar* gst_caps_get_mime (GstCaps *caps);
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void gst_caps_set_mime (GstCaps *caps, const gchar *mime);
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guint16 gst_caps_get_type_id (GstCaps *caps);
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void gst_caps_set_type_id (GstCaps *caps, guint16 type_id);
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GstCaps* gst_caps_set_props (GstCaps *caps, GstProps *props);
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GstProps* gst_caps_get_props (GstCaps *caps);
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#ifdef G_HAVE_ISO_VARARGS
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#define gst_caps_set(caps, ...) gst_props_set ((caps)->properties, __VA_ARGS__)
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#define gst_caps_get(caps, ...) gst_props_get ((caps)->properties, __VA_ARGS__)
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#elif defined(G_HAVE_GNUC_VARARGS)
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#define gst_caps_set(caps, name, args...) gst_props_set ((caps)->properties, name, ##args)
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#define gst_caps_get(caps, name, args...) gst_props_get ((caps)->properties, name, ##args)
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#endif
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#define gst_caps_get_int(caps,name,res) gst_props_entry_get_int(gst_props_get_entry((caps)->properties,name),res)
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#define gst_caps_get_float(caps,name,res) gst_props_entry_get_float(gst_props_get_entry((caps)->properties,name),res)
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#define gst_caps_get_fourcc_int(caps,name,res) gst_props_entry_get_fourcc_int(gst_props_get_entry((caps)->properties,name),res)
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#define gst_caps_get_boolean(caps,name,res) gst_props_entry_get_boolean(gst_props_get_entry((caps)->properties,name),res)
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#define gst_caps_get_string(caps,name,res) gst_props_entry_get_string(gst_props_get_entry((caps)->properties,name),res)
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gboolean gst_caps_has_property (GstCaps *caps, const gchar *name);
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gboolean gst_caps_has_property_typed (GstCaps *caps, const gchar *name, GstPropsType type);
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gboolean gst_caps_has_fixed_property (GstCaps *caps, const gchar *name);
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GstCaps* gst_caps_get_by_name (GstCaps *caps, const gchar *name);
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/* use and construct chained caps */
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GstCaps* gst_caps_next (GstCaps *caps);
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GstCaps* gst_caps_chain (GstCaps *caps, ...);
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GstCaps* gst_caps_append (GstCaps *caps, GstCaps *capstoadd);
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GstCaps* gst_caps_prepend (GstCaps *caps, GstCaps *capstoadd);
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/* see if fromcaps is a subset of tocaps */
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gboolean gst_caps_is_always_compatible (GstCaps *fromcaps, GstCaps *tocaps);
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/* operations on caps */
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GstCaps* gst_caps_intersect (GstCaps *caps1, GstCaps *caps2);
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GstCaps* gst_caps_union (GstCaps *caps1, GstCaps *caps2);
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GstCaps* gst_caps_normalize (GstCaps *caps);
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#ifndef GST_DISABLE_LOADSAVE
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xmlNodePtr gst_caps_save_thyself (GstCaps *caps, xmlNodePtr parent);
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GstCaps* gst_caps_load_thyself (xmlNodePtr parent);
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#endif
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/* for debugging purposes */
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gchar * gst_caps_to_string (GstCaps *caps);
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GstCaps * gst_caps_from_string (gchar *str);
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G_END_DECLS
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#endif /* __GST_CAPS_H__ */
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