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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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_STRUCTURE_H__
#define __GST_STRUCTURE_H__
#include <gst/gstconfig.h>
#include <glib-object.h>
#include <gst/gstclock.h>
#include <gst/gstdatetime.h>
#include <gst/glib-compat.h>
G_BEGIN_DECLS
GST_EXPORT GType _gst_structure_type;
typedef struct _GstStructure GstStructure;
#define GST_TYPE_STRUCTURE (_gst_structure_type)
#define GST_IS_STRUCTURE(object) ((object) && (GST_STRUCTURE(object)->type == GST_TYPE_STRUCTURE))
#define GST_STRUCTURE_CAST(object) ((GstStructure *)(object))
#define GST_STRUCTURE(object) (GST_STRUCTURE_CAST(object))
/**
* GstStructureForeachFunc:
* @field_id: the #GQuark of the field name
* @value: the #GValue of the field
* @user_data: user data
*
* A function that will be called in gst_structure_foreach(). The function may
* not modify @value.
*
* Returns: %TRUE if the foreach operation should continue, %FALSE if
* the foreach operation should stop with %FALSE.
*/
typedef gboolean (*GstStructureForeachFunc) (GQuark field_id,
const GValue * value,
gpointer user_data);
/**
* GstStructureMapFunc:
* @field_id: the #GQuark of the field name
* @value: the #GValue of the field
* @user_data: user data
*
* A function that will be called in gst_structure_map_in_place(). The function
* may modify @value.
*
* Returns: %TRUE if the map operation should continue, %FALSE if
* the map operation should stop with %FALSE.
*/
typedef gboolean (*GstStructureMapFunc) (GQuark field_id,
GValue * value,
gpointer user_data);
/**
* GstStructure:
* @type: the GType of a structure
*
* The GstStructure object. Most fields are private.
*/
struct _GstStructure {
GType type;
/*< private >*/
GQuark name;
};
GType gst_structure_get_type (void);
GstStructure * gst_structure_new_empty (const gchar * name) G_GNUC_MALLOC;
GstStructure * gst_structure_new_id_empty (GQuark quark) G_GNUC_MALLOC;
GstStructure * gst_structure_new (const gchar * name,
const gchar * firstfield,
...) G_GNUC_NULL_TERMINATED G_GNUC_MALLOC;
GstStructure * gst_structure_new_valist (const gchar * name,
const gchar * firstfield,
va_list varargs) G_GNUC_MALLOC;
GstStructure * gst_structure_new_id (GQuark name_quark,
GQuark field_quark,
...) G_GNUC_MALLOC;
GstStructure * gst_structure_new_from_string (const gchar * string);
GstStructure * gst_structure_copy (const GstStructure * structure) G_GNUC_MALLOC;
gboolean gst_structure_set_parent_refcount (GstStructure * structure,
gint * refcount);
void gst_structure_free (GstStructure * structure);
const gchar * gst_structure_get_name (const GstStructure * structure);
GQuark gst_structure_get_name_id (const GstStructure * structure);
gboolean gst_structure_has_name (const GstStructure * structure,
const gchar * name);
void gst_structure_set_name (GstStructure * structure,
const gchar * name);
void gst_structure_id_set_value (GstStructure * structure,
GQuark field,
const GValue * value);
void gst_structure_set_value (GstStructure * structure,
const gchar * fieldname,
const GValue * value);
void gst_structure_id_take_value (GstStructure * structure,
GQuark field,
GValue * value);
void gst_structure_take_value (GstStructure * structure,
const gchar * fieldname,
GValue * value);
void gst_structure_set (GstStructure * structure,
const gchar * fieldname,
...) G_GNUC_NULL_TERMINATED;
void gst_structure_set_valist (GstStructure * structure,
const gchar * fieldname,
va_list varargs);
void gst_structure_id_set (GstStructure * structure,
GQuark fieldname,
...) G_GNUC_NULL_TERMINATED;
void gst_structure_id_set_valist (GstStructure * structure,
GQuark fieldname,
va_list varargs);
gboolean gst_structure_get_valist (const GstStructure * structure,
const char * first_fieldname,
va_list args);
gboolean gst_structure_get (const GstStructure * structure,
const char * first_fieldname,
...) G_GNUC_NULL_TERMINATED;
gboolean gst_structure_id_get_valist (const GstStructure * structure,
GQuark first_field_id,
va_list args);
gboolean gst_structure_id_get (const GstStructure * structure,
GQuark first_field_id,
...) G_GNUC_NULL_TERMINATED;
const GValue * gst_structure_id_get_value (const GstStructure * structure,
GQuark field);
const GValue * gst_structure_get_value (const GstStructure * structure,
const gchar * fieldname);
void gst_structure_remove_field (GstStructure * structure,
const gchar * fieldname);
void gst_structure_remove_fields (GstStructure * structure,
const gchar * fieldname,
...) G_GNUC_NULL_TERMINATED;
void gst_structure_remove_fields_valist (GstStructure * structure,
const gchar * fieldname,
va_list varargs);
void gst_structure_remove_all_fields (GstStructure * structure);
GType gst_structure_get_field_type (const GstStructure * structure,
const gchar * fieldname);
gboolean gst_structure_foreach (const GstStructure * structure,
GstStructureForeachFunc func,
gpointer user_data);
gboolean gst_structure_map_in_place (GstStructure * structure,
GstStructureMapFunc func,
gpointer user_data);
gint gst_structure_n_fields (const GstStructure * structure);
const gchar * gst_structure_nth_field_name (const GstStructure * structure,
guint index);
gboolean gst_structure_id_has_field (const GstStructure * structure,
GQuark field);
gboolean gst_structure_id_has_field_typed (const GstStructure * structure,
GQuark field,
GType type);
gboolean gst_structure_has_field (const GstStructure * structure,
const gchar * fieldname);
gboolean gst_structure_has_field_typed (const GstStructure * structure,
const gchar * fieldname,
GType type);
/* utility functions */
gboolean gst_structure_get_boolean (const GstStructure * structure,
const gchar * fieldname,
gboolean * value);
gboolean gst_structure_get_int (const GstStructure * structure,
const gchar * fieldname,
gint * value);
gboolean gst_structure_get_uint (const GstStructure * structure,
const gchar * fieldname,
guint * value);
gboolean gst_structure_get_int64 (const GstStructure * structure,
const gchar * fieldname,
gint64 * value);
gboolean gst_structure_get_uint64 (const GstStructure * structure,
const gchar * fieldname,
guint64 * value);
gboolean gst_structure_get_double (const GstStructure * structure,
const gchar * fieldname,
gdouble * value);
gboolean gst_structure_get_date (const GstStructure * structure,
const gchar * fieldname,
GDate ** value);
gboolean gst_structure_get_date_time (const GstStructure * structure,
const gchar * fieldname,
GstDateTime ** value);
gboolean gst_structure_get_clock_time (const GstStructure * structure,
const gchar * fieldname,
GstClockTime * value);
const gchar * gst_structure_get_string (const GstStructure * structure,
const gchar * fieldname);
gboolean gst_structure_get_enum (const GstStructure * structure,
const gchar * fieldname,
GType enumtype,
gint * value);
gboolean gst_structure_get_fraction (const GstStructure * structure,
const gchar * fieldname,
gint * value_numerator,
gint * value_denominator);
gchar * gst_structure_to_string (const GstStructure * structure) G_GNUC_MALLOC;
GstStructure * gst_structure_from_string (const gchar * string,
gchar ** end) G_GNUC_MALLOC;
gboolean gst_structure_fixate_field_nearest_int (GstStructure * structure,
const char * field_name,
int target);
gboolean gst_structure_fixate_field_nearest_double (GstStructure * structure,
const char * field_name,
double target);
gboolean gst_structure_fixate_field_boolean (GstStructure * structure,
const char * field_name,
gboolean target);
gboolean gst_structure_fixate_field_string (GstStructure * structure,
const char * field_name,
const gchar * target);
gboolean gst_structure_fixate_field_nearest_fraction (GstStructure * structure,
const char * field_name,
const gint target_numerator,
const gint target_denominator);
gboolean gst_structure_fixate_field (GstStructure * structure,
const char * field_name);
void gst_structure_fixate (GstStructure * structure);
gboolean gst_structure_is_equal (const GstStructure * structure1,
const GstStructure * structure2);
gboolean gst_structure_is_subset (const GstStructure * subset,
const GstStructure * superset);
gboolean gst_structure_can_intersect (const GstStructure * struct1,
const GstStructure * struct2);
GstStructure * gst_structure_intersect (const GstStructure * struct1,
const GstStructure * struct2) G_GNUC_MALLOC;
G_END_DECLS
#endif
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