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>
#include <gst/gstclock.h>
#include <gst/glib-compat.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;
};
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);
gst/gstcaps.c: check for ANY caps before appending/unioning Original commit message from CVS: * gst/gstcaps.c: (gst_caps_append), (gst_caps_union): check for ANY caps before appending/unioning * gst/gstcaps.c: (gst_caps_is_subset), (gst_caps_is_equal), (gst_caps_structure_subtract_field), (gst_caps_structure_subtract), (gst_caps_subtract): * gst/gstcaps.h: add gst_caps_is_equal, gst_caps_is_subset and gst_caps_subtract to the API. deprecate gst_caps_is_equal_fixed * gst/gstpad.c: (gst_pad_try_set_caps): * gst/gstqueue.c: (gst_queue_link): s/gst_caps_is_equal_fixed/gst_caps_is_equal/ * gst/gststructure.c: (gst_structure_get_name_id): * gst/gststructure.h: add function gst_structure_get_name_id * gst/gstvalue.c: (gst_value_subtract_int_int_range), (gst_value_create_new_range), (gst_value_subtract_int_range_int), (gst_value_subtract_int_range_int_range), (gst_value_subtract_double_double_range), (gst_value_subtract_double_range_double), (gst_value_subtract_double_range_double_range), (gst_value_subtract_from_list), (gst_value_subtract_list), (gst_value_can_intersect), (gst_value_subtract), (gst_value_can_subtract), (gst_value_register_subtract_func), (_gst_value_initialize): * gst/gstvalue.h: add support for subtracting values from each other. Note that subtracting means subtracting as in set theory. Required for caps stuff above. * testsuite/caps/.cvsignore: * testsuite/caps/Makefile.am: * testsuite/caps/erathostenes.c: (erathostenes), (main): * testsuite/caps/sets.c: (check_caps), (main): * testsuite/caps/subtract.c: (check_caps), (main): add tests for subtraction and equality code.
2004-04-21 03:25:13 +00:00
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,
...) 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);
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,
...) 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_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);
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);
GstStructure * gst_structure_from_string (const gchar *string,
gchar **end);
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);
Implement fraction ranges and extend GstFraction to support arithmetic subtraction, as well as deserialization from i... Original commit message from CVS: * check/gst/capslist.h: * check/gst/gstcaps.c: (GST_START_TEST): * check/gst/gstvalue.c: (GST_START_TEST), (gst_value_suite): * gst/gststructure.c: (gst_structure_parse_range), (gst_structure_fixate_field_nearest_fraction): * gst/gststructure.h: * gst/gstvalue.c: (gst_value_init_fraction_range), (gst_value_free_fraction_range), (gst_value_copy_fraction_range), (gst_value_collect_fraction_range), (gst_value_lcopy_fraction_range), (gst_value_set_fraction_range), (gst_value_set_fraction_range_full), (gst_value_get_fraction_range_min), (gst_value_get_fraction_range_max), (gst_value_serialize_fraction_range), (gst_value_transform_fraction_range_string), (gst_value_compare_fraction_range), (gst_value_deserialize_fraction_range), (gst_value_intersect_fraction_fraction_range), (gst_value_intersect_fraction_range_fraction_range), (gst_value_subtract_fraction_fraction_range), (gst_value_subtract_fraction_range_fraction), (gst_value_subtract_fraction_range_fraction_range), (gst_value_collect_fraction), (gst_value_fraction_multiply), (gst_value_fraction_subtract), (gst_value_deserialize_fraction), (gst_value_transform_string_fraction), (_gst_value_initialize): * gst/gstvalue.h: Implement fraction ranges and extend GstFraction to support arithmetic subtraction, as well as deserialization from integer strings such as "100" Add a testsuite as for int and double range set operations
2005-11-21 23:54:59 +00:00
gboolean gst_structure_fixate_field_nearest_fraction (GstStructure *structure,
const char *field_name,
const gint target_numerator,
const gint target_denominator);
G_END_DECLS
#endif