| /* 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> |
| #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_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_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); |
| |
| 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; |
| void gst_structure_fixate (GstStructure *structure); |
| |
| G_END_DECLS |
| |
| #endif |
| |
