mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-29 19:50:40 +00:00
e89aaa7e30
Original commit message from CVS: 2005-11-19 Andy Wingo <wingo@pobox.com> * gst/gsttaglist.c: * gst/gsttaglist.h (gst_tag_list_foreach): Operates on a const GstTagList*. Fixes #143472. * gst/gststructure.h: Clarify what the foreach/map functions can or can't do to their arguments.
196 lines
8.7 KiB
C
196 lines
8.7 KiB
C
/* 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>
|
|
#include <gst/gstclock.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
#define GST_TYPE_STRUCTURE (gst_structure_get_type ())
|
|
#define GST_STRUCTURE(object) ((GstStructure *)(object))
|
|
#define GST_IS_STRUCTURE(object) ((object) && (GST_STRUCTURE(object)->type == GST_TYPE_STRUCTURE))
|
|
|
|
typedef struct _GstStructure GstStructure;
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/* owned by parent structure, NULL if no parent */
|
|
gint *parent_refcount;
|
|
|
|
GArray *fields;
|
|
|
|
gpointer _gst_reserved[GST_PADDING];
|
|
};
|
|
|
|
GType gst_structure_get_type (void);
|
|
|
|
GstStructure * gst_structure_empty_new (const gchar * name);
|
|
GstStructure * gst_structure_id_empty_new (GQuark quark);
|
|
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 (const GstStructure *structure);
|
|
void gst_structure_set_parent_refcount (GstStructure *structure,
|
|
gint *refcount);
|
|
void gst_structure_free (GstStructure *structure);
|
|
|
|
G_CONST_RETURN 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_set (GstStructure *structure,
|
|
const gchar *fieldname,
|
|
...);
|
|
void gst_structure_set_valist (GstStructure *structure,
|
|
const gchar *fieldname,
|
|
va_list varargs);
|
|
G_CONST_RETURN GValue * gst_structure_id_get_value (const GstStructure *structure,
|
|
GQuark field);
|
|
G_CONST_RETURN 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,
|
|
...);
|
|
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_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_fourcc (const GstStructure *structure,
|
|
const gchar *fieldname,
|
|
guint32 *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_clock_time (const GstStructure *structure,
|
|
const gchar *fieldname,
|
|
GstClockTime *value);
|
|
G_CONST_RETURN 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);
|
|
|
|
gchar * gst_structure_to_string (const GstStructure *structure);
|
|
GstStructure * gst_structure_from_string (const gchar *string,
|
|
gchar **end);
|
|
|
|
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);
|
|
|
|
gboolean gst_caps_structure_fixate_field_boolean (GstStructure *structure,
|
|
const char *field_name,
|
|
gboolean target);
|
|
|
|
|
|
G_END_DECLS
|
|
|
|
#endif
|
|
|