gstreamer/gst/gststructure.h

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/* 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_STRUCTURE_H__
#define __GST_STRUCTURE_H__
#include <gst/gstconfig.h>
#include <glib-object.h>
G_BEGIN_DECLS
typedef struct _GstStructure GstStructure;
typedef struct _GstStructureField GstStructureField;
typedef void (*GstStructureForeachFunc) (GstStructure *structure,
GQuark field_id, GValue *value, gpointer user_data);
struct _GstStructure {
int len;
GQuark name;
GArray *fields;
};
struct _GstStructureField {
GQuark name;
GValue value;
};
#define GST_STRUCTURE_FIELD(structure, index) \
&g_array_index((structure)->fields, GstStructureField, (index))
GType gst_structure_get_type(void);
void _gst_structure_initialize(void);
GstStructure *gst_structure_empty_new(const gchar *name);
GstStructure *gst_structure_new(const gchar *name,
const gchar *firstfield, ...);
GstStructure *gst_structure_new_valist(const gchar *name,
const gchar *firstfield, va_list varargs);
GstStructure *gst_structure_copy(GstStructure *structure);
void gst_structure_free(GstStructure *structure);
const gchar *gst_structure_get_name(GstStructure *structure);
void gst_structure_set_name(GstStructure *structure, const gchar *name);
void gst_structure_set_field(GstStructure *structure,
GstStructureField *field);
void gst_structure_id_set_value(GstStructure *structure, GQuark field,
GValue *value);
void gst_structure_set_value(GstStructure *structure, const gchar *field,
GValue *value);
void gst_structure_set(GstStructure *structure, const gchar *field, ...);
void gst_structure_set_valist(GstStructure *structure, const gchar *field,
va_list varargs);
const GValue *gst_structure_get_value(GstStructure *structure, const gchar *field);
GstStructureField *gst_structure_get_field(GstStructure *structure,
const gchar *fieldname);
GstStructureField *gst_structure_id_get_field(GstStructure *structure,
GQuark fieldname);
void gst_structure_remove_field(GstStructure *structure, const gchar *field);
GType gst_structure_get_field_type(GstStructure *structure,
const gchar *field);
void gst_structure_field_foreach (GstStructure *structure,
GstStructureForeachFunc func, gpointer user_data);
gint gst_structure_n_fields(GstStructure *structure);
gboolean gst_structure_has_field(GstStructure *structure, const gchar *field);
gboolean gst_structure_has_field_typed(GstStructure *structure,
const gchar *field, GType type);
/* utility functions */
gboolean gst_structure_get_boolean(GstStructure *structure, const gchar *field,
gboolean *value);
gboolean gst_structure_get_int(GstStructure *structure, const gchar *field,
gint *value);
gboolean gst_structure_get_fourcc(GstStructure *structure, const gchar *field,
guint32 *value);
gboolean gst_structure_get_double(GstStructure *structure, const gchar *field,
gdouble *value);
const gchar *gst_structure_get_string(GstStructure *structure,
const gchar *field);
gchar * gst_structure_to_string(GstStructure *structure);
GstStructure * gst_structure_from_string (const gchar *string);
G_END_DECLS
#endif