gstreamer/gst/gstcaps.h

/* GStreamer
 * Copyright (C) <2003> David A. Schleef <ds@schleef.org>
 *
 * 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_CAPS_H__
#define __GST_CAPS_H__

#include <gst/gstconfig.h>
#include <gst/gststructure.h>

G_BEGIN_DECLS

#define GST_CAPS_FLAGS_ANY	(1<<0)

extern GType _gst_caps_type;

typedef struct _GstCaps GstCaps;
typedef struct _GstStaticCaps GstStaticCaps;

struct _GstCaps {
  GType type;

  guint16 flags;
  GPtrArray *structs;
};

struct _GstStaticCaps {
  GstCaps caps;
  const char *string;
};

#define GST_STATIC_CAPS(string) \
{ \
  /* caps */ { 0 }, \
  /* string */ string, \
}

#define GST_CAPS_ANY gst_caps_new_any()
#define GST_CAPS_NONE gst_caps_new_empty()

#define GST_STATIC_CAPS_ANY GST_STATIC_CAPS("ANY")
#define GST_STATIC_CAPS_NONE GST_STATIC_CAPS("NONE")

#define GST_TYPE_CAPS gst_caps_get_type()

/* FIXME Company should decide the best way to do this */
#define GST_DEBUG_CAPS(string, caps) do {		\
  char *s = gst_caps_to_string(caps);			\
  GST_DEBUG ( "%s: %s", (string), s);			\
  g_free(s);						\
}while(0)


void _gst_caps_initialize (void);
GType gst_caps_get_type (void);

/* creation/deletion */
GstCaps *gst_caps_new_empty (void);
GstCaps *gst_caps_new_any (void);
GstCaps *gst_caps_new_simple (const char *media_type, const char *fieldname, ...);
GstCaps *gst_caps_new_full (GstStructure *struct1, ...);
GstCaps *gst_caps_new_full_valist (GstStructure *structure, va_list var_args);
GstCaps *gst_caps_copy (const GstCaps *caps);
void gst_caps_free (GstCaps *caps);
G_CONST_RETURN GstCaps *gst_static_caps_get (GstStaticCaps *caps);

/* manipulation */
void gst_caps_append (GstCaps *caps1, GstCaps *caps2);
void gst_caps_append_structure (GstCaps *caps1, GstStructure *structure);
GstCaps *gst_caps_split_one (GstCaps *caps);
int gst_caps_get_size (const GstCaps *caps);
GstStructure *gst_caps_get_structure (const GstCaps *caps, int index);
GstCaps *gst_caps_copy_1 (const GstCaps *caps);
void gst_caps_set_simple (GstCaps *caps, char *field, ...);
void gst_caps_set_simple_valist (GstCaps *caps, char *field, va_list varargs);

/* tests */
gboolean gst_caps_is_any (const GstCaps *caps);
gboolean gst_caps_is_empty (const GstCaps *caps);
gboolean gst_caps_is_chained (const GstCaps *caps);
gboolean gst_caps_is_fixed (const GstCaps *caps);
gboolean gst_caps_is_always_compatible (const GstCaps *caps1,
    const GstCaps *caps2);

/* operations */
GstCaps *gst_caps_intersect (const GstCaps *caps1, const GstCaps *caps2);
GstCaps *gst_caps_union (const GstCaps *caps1, const GstCaps *caps2);
GstCaps *gst_caps_normalize (const GstCaps *caps);

#ifndef GST_DISABLE_LOADSAVE
xmlNodePtr gst_caps_save_thyself (const GstCaps *caps, xmlNodePtr parent);
GstCaps *gst_caps_load_thyself (xmlNodePtr parent);
#endif

/* utility */
void gst_caps_replace (GstCaps **caps, GstCaps *newcaps);
gchar *gst_caps_to_string (const GstCaps *caps);
GstCaps *gst_caps_from_string (const gchar *string);

gboolean gst_caps_structure_fixate_field_nearest_int (GstStructure *structure,
    const char *field_name, int target);
gboolean gst_caps_structure_fixate_field_nearest_double (GstStructure
    *structure, const char *field_name, double target);


G_END_DECLS

#endif /* __GST_CAPS_H__ */