mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-08 21:28:45 +00:00
3208 lines
86 KiB
C
3208 lines
86 KiB
C
/* GStreamer
|
|
* Copyright (C) 2003 David A. Schleef <ds@schleef.org>
|
|
*
|
|
* gststructure.c: lists of { GQuark, GValue } tuples
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/**
|
|
* SECTION:gststructure
|
|
* @short_description: Generic structure containing fields of names and values
|
|
* @see_also: #GstCaps, #GstMessage, #GstEvent, #GstQuery
|
|
*
|
|
* A #GstStructure is a collection of key/value pairs. The keys are expressed
|
|
* as GQuarks and the values can be of any GType.
|
|
*
|
|
* In addition to the key/value pairs, a #GstStructure also has a name. The name
|
|
* starts with a letter and can be folled by letters, numbers and any of "/-_.:".
|
|
*
|
|
* #GstStructure is used by various GStreamer subsystems to store information
|
|
* in a flexible and extensible way. A #GstStructure does not have a refcount
|
|
* because it usually is part of a higher level object such as #GstCaps. It
|
|
* provides a means to enforce mutability using the refcount of the parent
|
|
* with the gst_structure_set_parent_refcount() method.
|
|
*
|
|
* A #GstStructure can be created with gst_structure_new_empty() or
|
|
* gst_structure_new(), which both take a name and an optional set of
|
|
* key/value pairs along with the types of the values.
|
|
*
|
|
* Field values can be changed with gst_structure_set_value() or
|
|
* gst_structure_set().
|
|
*
|
|
* Field values can be retrieved with gst_structure_get_value() or the more
|
|
* convenient gst_structure_get_*() functions.
|
|
*
|
|
* Fields can be removed with gst_structure_remove_field() or
|
|
* gst_structure_remove_fields().
|
|
*
|
|
* Strings in structures must be ASCII or UTF-8 encoded. Other encodings are
|
|
* not allowed. Strings must not be empty either, but may be NULL.
|
|
*
|
|
* Last reviewed on 2009-06-08 (0.10.23)
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <string.h>
|
|
|
|
#include "gst_private.h"
|
|
#include "gstquark.h"
|
|
#include <gst/gst.h>
|
|
#include <gobject/gvaluecollector.h>
|
|
|
|
typedef struct _GstStructureField GstStructureField;
|
|
|
|
struct _GstStructureField
|
|
{
|
|
GQuark name;
|
|
GValue value;
|
|
};
|
|
|
|
typedef struct
|
|
{
|
|
GstStructure s;
|
|
|
|
/* owned by parent structure, NULL if no parent */
|
|
gint *parent_refcount;
|
|
|
|
GArray *fields;
|
|
} GstStructureImpl;
|
|
|
|
#define GST_STRUCTURE_REFCOUNT(s) (((GstStructureImpl*)(s))->parent_refcount)
|
|
#define GST_STRUCTURE_FIELDS(s) (((GstStructureImpl*)(s))->fields)
|
|
|
|
#define GST_STRUCTURE_FIELD(structure, index) \
|
|
&g_array_index(GST_STRUCTURE_FIELDS(structure), GstStructureField, (index))
|
|
|
|
#define IS_MUTABLE(structure) \
|
|
(!GST_STRUCTURE_REFCOUNT(structure) || \
|
|
g_atomic_int_get (GST_STRUCTURE_REFCOUNT(structure)) == 1)
|
|
|
|
#define IS_TAGLIST(structure) \
|
|
(structure->name == GST_QUARK (TAGLIST))
|
|
|
|
static void gst_structure_set_field (GstStructure * structure,
|
|
GstStructureField * field);
|
|
static GstStructureField *gst_structure_get_field (const GstStructure *
|
|
structure, const gchar * fieldname);
|
|
static GstStructureField *gst_structure_id_get_field (const GstStructure *
|
|
structure, GQuark field);
|
|
static void gst_structure_transform_to_string (const GValue * src_value,
|
|
GValue * dest_value);
|
|
static GstStructure *gst_structure_copy_conditional (const GstStructure *
|
|
structure);
|
|
static gboolean gst_structure_parse_value (gchar * str, gchar ** after,
|
|
GValue * value, GType default_type);
|
|
static gboolean gst_structure_parse_simple_string (gchar * s, gchar ** end);
|
|
|
|
GType _gst_structure_type = 0;
|
|
|
|
|
|
G_DEFINE_BOXED_TYPE (GstStructure, gst_structure,
|
|
gst_structure_copy_conditional, gst_structure_free);
|
|
|
|
void
|
|
_priv_gst_structure_initialize (void)
|
|
{
|
|
_gst_structure_type = gst_structure_get_type ();
|
|
|
|
g_value_register_transform_func (_gst_structure_type, G_TYPE_STRING,
|
|
gst_structure_transform_to_string);
|
|
}
|
|
|
|
static GstStructure *
|
|
gst_structure_new_id_empty_with_size (GQuark quark, guint prealloc)
|
|
{
|
|
GstStructureImpl *structure;
|
|
|
|
structure = g_slice_new (GstStructureImpl);
|
|
((GstStructure *) structure)->type = _gst_structure_type;
|
|
((GstStructure *) structure)->name = quark;
|
|
GST_STRUCTURE_REFCOUNT (structure) = NULL;
|
|
GST_STRUCTURE_FIELDS (structure) =
|
|
g_array_sized_new (FALSE, FALSE, sizeof (GstStructureField), prealloc);
|
|
|
|
return GST_STRUCTURE_CAST (structure);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_new_id_empty:
|
|
* @quark: name of new structure
|
|
*
|
|
* Creates a new, empty #GstStructure with the given name as a GQuark.
|
|
*
|
|
* Free-function: gst_structure_free
|
|
*
|
|
* Returns: (transfer full): a new, empty #GstStructure
|
|
*/
|
|
GstStructure *
|
|
gst_structure_new_id_empty (GQuark quark)
|
|
{
|
|
g_return_val_if_fail (quark != 0, NULL);
|
|
|
|
return gst_structure_new_id_empty_with_size (quark, 0);
|
|
}
|
|
|
|
#ifndef G_DISABLE_CHECKS
|
|
static gboolean
|
|
gst_structure_validate_name (const gchar * name)
|
|
{
|
|
const gchar *s;
|
|
|
|
g_return_val_if_fail (name != NULL, FALSE);
|
|
|
|
if (G_UNLIKELY (!g_ascii_isalpha (*name))) {
|
|
GST_WARNING ("Invalid character '%c' at offset 0 in structure name: %s",
|
|
*name, name);
|
|
return FALSE;
|
|
}
|
|
|
|
/* FIXME: test name string more */
|
|
s = &name[1];
|
|
while (*s && (g_ascii_isalnum (*s) || strchr ("/-_.:+", *s) != NULL))
|
|
s++;
|
|
if (G_UNLIKELY (*s != '\0')) {
|
|
GST_WARNING ("Invalid character '%c' at offset %" G_GUINTPTR_FORMAT " in"
|
|
" structure name: %s", *s, ((guintptr) s - (guintptr) name), name);
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* gst_structure_new_empty:
|
|
* @name: name of new structure
|
|
*
|
|
* Creates a new, empty #GstStructure with the given @name.
|
|
*
|
|
* See gst_structure_set_name() for constraints on the @name parameter.
|
|
*
|
|
* Free-function: gst_structure_free
|
|
*
|
|
* Returns: (transfer full): a new, empty #GstStructure
|
|
*/
|
|
GstStructure *
|
|
gst_structure_new_empty (const gchar * name)
|
|
{
|
|
g_return_val_if_fail (gst_structure_validate_name (name), NULL);
|
|
|
|
return gst_structure_new_id_empty_with_size (g_quark_from_string (name), 0);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_new:
|
|
* @name: name of new structure
|
|
* @firstfield: name of first field to set
|
|
* @...: additional arguments
|
|
*
|
|
* Creates a new #GstStructure with the given name. Parses the
|
|
* list of variable arguments and sets fields to the values listed.
|
|
* Variable arguments should be passed as field name, field type,
|
|
* and value. Last variable argument should be NULL.
|
|
*
|
|
* Free-function: gst_structure_free
|
|
*
|
|
* Returns: (transfer full): a new #GstStructure
|
|
*/
|
|
GstStructure *
|
|
gst_structure_new (const gchar * name, const gchar * firstfield, ...)
|
|
{
|
|
GstStructure *structure;
|
|
va_list varargs;
|
|
|
|
va_start (varargs, firstfield);
|
|
structure = gst_structure_new_valist (name, firstfield, varargs);
|
|
va_end (varargs);
|
|
|
|
return structure;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_new_valist:
|
|
* @name: name of new structure
|
|
* @firstfield: name of first field to set
|
|
* @varargs: variable argument list
|
|
*
|
|
* Creates a new #GstStructure with the given @name. Structure fields
|
|
* are set according to the varargs in a manner similar to
|
|
* gst_structure_new().
|
|
*
|
|
* See gst_structure_set_name() for constraints on the @name parameter.
|
|
*
|
|
* Free-function: gst_structure_free
|
|
*
|
|
* Returns: (transfer full): a new #GstStructure
|
|
*/
|
|
GstStructure *
|
|
gst_structure_new_valist (const gchar * name,
|
|
const gchar * firstfield, va_list varargs)
|
|
{
|
|
GstStructure *structure;
|
|
|
|
structure = gst_structure_new_empty (name);
|
|
|
|
if (structure)
|
|
gst_structure_set_valist (structure, firstfield, varargs);
|
|
|
|
return structure;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_set_parent_refcount:
|
|
* @structure: a #GstStructure
|
|
* @refcount: (in): a pointer to the parent's refcount
|
|
*
|
|
* Sets the parent_refcount field of #GstStructure. This field is used to
|
|
* determine whether a structure is mutable or not. This function should only be
|
|
* called by code implementing parent objects of #GstStructure, as described in
|
|
* the MT Refcounting section of the design documents.
|
|
*
|
|
* Returns: %TRUE if the parent refcount could be set.
|
|
*/
|
|
gboolean
|
|
gst_structure_set_parent_refcount (GstStructure * structure, gint * refcount)
|
|
{
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
|
|
/* if we have a parent_refcount already, we can only clear
|
|
* if with a NULL refcount */
|
|
if (GST_STRUCTURE_REFCOUNT (structure)) {
|
|
if (refcount != NULL) {
|
|
g_return_val_if_fail (refcount == NULL, FALSE);
|
|
return FALSE;
|
|
}
|
|
} else {
|
|
if (refcount == NULL) {
|
|
g_return_val_if_fail (refcount != NULL, FALSE);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
GST_STRUCTURE_REFCOUNT (structure) = refcount;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_copy:
|
|
* @structure: a #GstStructure to duplicate
|
|
*
|
|
* Duplicates a #GstStructure and all its fields and values.
|
|
*
|
|
* Free-function: gst_structure_free
|
|
*
|
|
* Returns: (transfer none): a new #GstStructure.
|
|
*/
|
|
GstStructure *
|
|
gst_structure_copy (const GstStructure * structure)
|
|
{
|
|
GstStructure *new_structure;
|
|
GstStructureField *field;
|
|
guint i, len;
|
|
|
|
g_return_val_if_fail (structure != NULL, NULL);
|
|
|
|
len = GST_STRUCTURE_FIELDS (structure)->len;
|
|
new_structure = gst_structure_new_id_empty_with_size (structure->name, len);
|
|
|
|
for (i = 0; i < len; i++) {
|
|
GstStructureField new_field = { 0 };
|
|
|
|
field = GST_STRUCTURE_FIELD (structure, i);
|
|
|
|
new_field.name = field->name;
|
|
gst_value_init_and_copy (&new_field.value, &field->value);
|
|
g_array_append_val (GST_STRUCTURE_FIELDS (new_structure), new_field);
|
|
}
|
|
|
|
return new_structure;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_free:
|
|
* @structure: (in) (transfer full): the #GstStructure to free
|
|
*
|
|
* Frees a #GstStructure and all its fields and values. The structure must not
|
|
* have a parent when this function is called.
|
|
*/
|
|
void
|
|
gst_structure_free (GstStructure * structure)
|
|
{
|
|
GstStructureField *field;
|
|
guint i, len;
|
|
|
|
g_return_if_fail (structure != NULL);
|
|
g_return_if_fail (GST_STRUCTURE_REFCOUNT (structure) == NULL);
|
|
|
|
len = GST_STRUCTURE_FIELDS (structure)->len;
|
|
for (i = 0; i < len; i++) {
|
|
field = GST_STRUCTURE_FIELD (structure, i);
|
|
|
|
if (G_IS_VALUE (&field->value)) {
|
|
g_value_unset (&field->value);
|
|
}
|
|
}
|
|
g_array_free (GST_STRUCTURE_FIELDS (structure), TRUE);
|
|
#ifdef USE_POISONING
|
|
memset (structure, 0xff, sizeof (GstStructure));
|
|
#endif
|
|
g_slice_free1 (sizeof (GstStructureImpl), structure);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_name:
|
|
* @structure: a #GstStructure
|
|
*
|
|
* Get the name of @structure as a string.
|
|
*
|
|
* Returns: the name of the structure.
|
|
*/
|
|
const gchar *
|
|
gst_structure_get_name (const GstStructure * structure)
|
|
{
|
|
g_return_val_if_fail (structure != NULL, NULL);
|
|
|
|
return g_quark_to_string (structure->name);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_has_name:
|
|
* @structure: a #GstStructure
|
|
* @name: structure name to check for
|
|
*
|
|
* Checks if the structure has the given name
|
|
*
|
|
* Returns: TRUE if @name matches the name of the structure.
|
|
*/
|
|
gboolean
|
|
gst_structure_has_name (const GstStructure * structure, const gchar * name)
|
|
{
|
|
const gchar *structure_name;
|
|
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (name != NULL, FALSE);
|
|
|
|
/* getting the string is cheap and comparing short strings is too
|
|
* should be faster than getting the quark for name and comparing the quarks
|
|
*/
|
|
structure_name = g_quark_to_string (structure->name);
|
|
|
|
return (structure_name && strcmp (structure_name, name) == 0);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_name_id:
|
|
* @structure: a #GstStructure
|
|
*
|
|
* Get the name of @structure as a GQuark.
|
|
*
|
|
* Returns: the quark representing the name of the structure.
|
|
*/
|
|
GQuark
|
|
gst_structure_get_name_id (const GstStructure * structure)
|
|
{
|
|
g_return_val_if_fail (structure != NULL, 0);
|
|
|
|
return structure->name;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_set_name:
|
|
* @structure: a #GstStructure
|
|
* @name: the new name of the structure
|
|
*
|
|
* Sets the name of the structure to the given @name. The string
|
|
* provided is copied before being used. It must not be empty, start with a
|
|
* letter and can be followed by letters, numbers and any of "/-_.:".
|
|
*/
|
|
void
|
|
gst_structure_set_name (GstStructure * structure, const gchar * name)
|
|
{
|
|
g_return_if_fail (structure != NULL);
|
|
g_return_if_fail (IS_MUTABLE (structure));
|
|
g_return_if_fail (gst_structure_validate_name (name));
|
|
|
|
structure->name = g_quark_from_string (name);
|
|
}
|
|
|
|
static inline void
|
|
gst_structure_id_set_value_internal (GstStructure * structure, GQuark field,
|
|
const GValue * value)
|
|
{
|
|
GstStructureField gsfield = { 0, {0,} };
|
|
|
|
gsfield.name = field;
|
|
gst_value_init_and_copy (&gsfield.value, value);
|
|
|
|
gst_structure_set_field (structure, &gsfield);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_id_set_value:
|
|
* @structure: a #GstStructure
|
|
* @field: a #GQuark representing a field
|
|
* @value: the new value of the field
|
|
*
|
|
* Sets the field with the given GQuark @field to @value. If the field
|
|
* does not exist, it is created. If the field exists, the previous
|
|
* value is replaced and freed.
|
|
*/
|
|
void
|
|
gst_structure_id_set_value (GstStructure * structure,
|
|
GQuark field, const GValue * value)
|
|
{
|
|
|
|
g_return_if_fail (structure != NULL);
|
|
g_return_if_fail (G_IS_VALUE (value));
|
|
g_return_if_fail (IS_MUTABLE (structure));
|
|
|
|
gst_structure_id_set_value_internal (structure, field, value);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_set_value:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of the field to set
|
|
* @value: the new value of the field
|
|
*
|
|
* Sets the field with the given name @field to @value. If the field
|
|
* does not exist, it is created. If the field exists, the previous
|
|
* value is replaced and freed.
|
|
*/
|
|
void
|
|
gst_structure_set_value (GstStructure * structure,
|
|
const gchar * fieldname, const GValue * value)
|
|
{
|
|
g_return_if_fail (structure != NULL);
|
|
g_return_if_fail (fieldname != NULL);
|
|
g_return_if_fail (G_IS_VALUE (value));
|
|
g_return_if_fail (IS_MUTABLE (structure));
|
|
|
|
gst_structure_id_set_value_internal (structure,
|
|
g_quark_from_string (fieldname), value);
|
|
}
|
|
|
|
static inline void
|
|
gst_structure_id_take_value_internal (GstStructure * structure, GQuark field,
|
|
GValue * value)
|
|
{
|
|
GstStructureField gsfield = { 0, {0,} };
|
|
|
|
gsfield.name = field;
|
|
gsfield.value = *value;
|
|
|
|
gst_structure_set_field (structure, &gsfield);
|
|
|
|
/* we took ownership */
|
|
#ifdef USE_POISONING
|
|
memset (value, 0, sizeof (GValue));
|
|
#else
|
|
value->g_type = G_TYPE_INVALID;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* gst_structure_id_take_value:
|
|
* @structure: a #GstStructure
|
|
* @field: a #GQuark representing a field
|
|
* @value: (transfer full): the new value of the field
|
|
*
|
|
* Sets the field with the given GQuark @field to @value. If the field
|
|
* does not exist, it is created. If the field exists, the previous
|
|
* value is replaced and freed.
|
|
*
|
|
* Since: 0.10.31
|
|
*/
|
|
void
|
|
gst_structure_id_take_value (GstStructure * structure, GQuark field,
|
|
GValue * value)
|
|
{
|
|
g_return_if_fail (structure != NULL);
|
|
g_return_if_fail (G_IS_VALUE (value));
|
|
g_return_if_fail (IS_MUTABLE (structure));
|
|
|
|
gst_structure_id_take_value_internal (structure, field, value);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_take_value:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of the field to set
|
|
* @value: (transfer full): the new value of the field
|
|
*
|
|
* Sets the field with the given name @field to @value. If the field
|
|
* does not exist, it is created. If the field exists, the previous
|
|
* value is replaced and freed. The function will take ownership of @value.
|
|
*
|
|
* Since: 0.10.31
|
|
*/
|
|
void
|
|
gst_structure_take_value (GstStructure * structure, const gchar * fieldname,
|
|
GValue * value)
|
|
{
|
|
g_return_if_fail (structure != NULL);
|
|
g_return_if_fail (fieldname != NULL);
|
|
g_return_if_fail (G_IS_VALUE (value));
|
|
g_return_if_fail (IS_MUTABLE (structure));
|
|
|
|
gst_structure_id_take_value_internal (structure,
|
|
g_quark_from_string (fieldname), value);
|
|
}
|
|
|
|
static void
|
|
gst_structure_set_valist_internal (GstStructure * structure,
|
|
const gchar * fieldname, va_list varargs)
|
|
{
|
|
gchar *err = NULL;
|
|
GType type;
|
|
|
|
while (fieldname) {
|
|
GstStructureField field = { 0 };
|
|
|
|
field.name = g_quark_from_string (fieldname);
|
|
|
|
type = va_arg (varargs, GType);
|
|
|
|
if (G_UNLIKELY (type == G_TYPE_DATE)) {
|
|
g_warning ("Don't use G_TYPE_DATE, use GST_TYPE_DATE instead\n");
|
|
type = GST_TYPE_DATE;
|
|
}
|
|
G_VALUE_COLLECT_INIT (&field.value, type, varargs, 0, &err);
|
|
if (G_UNLIKELY (err)) {
|
|
g_critical ("%s", err);
|
|
return;
|
|
}
|
|
gst_structure_set_field (structure, &field);
|
|
|
|
fieldname = va_arg (varargs, gchar *);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_structure_set:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of the field to set
|
|
* @...: variable arguments
|
|
*
|
|
* Parses the variable arguments and sets fields accordingly.
|
|
* Variable arguments should be in the form field name, field type
|
|
* (as a GType), value(s). The last variable argument should be NULL.
|
|
*/
|
|
void
|
|
gst_structure_set (GstStructure * structure, const gchar * field, ...)
|
|
{
|
|
va_list varargs;
|
|
|
|
g_return_if_fail (structure != NULL);
|
|
g_return_if_fail (IS_MUTABLE (structure) || field == NULL);
|
|
|
|
va_start (varargs, field);
|
|
gst_structure_set_valist_internal (structure, field, varargs);
|
|
va_end (varargs);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_set_valist:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of the field to set
|
|
* @varargs: variable arguments
|
|
*
|
|
* va_list form of gst_structure_set().
|
|
*/
|
|
void
|
|
gst_structure_set_valist (GstStructure * structure,
|
|
const gchar * fieldname, va_list varargs)
|
|
{
|
|
g_return_if_fail (structure != NULL);
|
|
g_return_if_fail (IS_MUTABLE (structure));
|
|
|
|
gst_structure_set_valist_internal (structure, fieldname, varargs);
|
|
}
|
|
|
|
static void
|
|
gst_structure_id_set_valist_internal (GstStructure * structure,
|
|
GQuark fieldname, va_list varargs)
|
|
{
|
|
gchar *err = NULL;
|
|
GType type;
|
|
|
|
while (fieldname) {
|
|
GstStructureField field = { 0 };
|
|
|
|
field.name = fieldname;
|
|
|
|
type = va_arg (varargs, GType);
|
|
|
|
if (G_UNLIKELY (type == G_TYPE_DATE)) {
|
|
g_warning ("Don't use G_TYPE_DATE, use GST_TYPE_DATE instead\n");
|
|
type = GST_TYPE_DATE;
|
|
}
|
|
#ifndef G_VALUE_COLLECT_INIT
|
|
g_value_init (&field.value, type);
|
|
G_VALUE_COLLECT (&field.value, varargs, 0, &err);
|
|
#else
|
|
G_VALUE_COLLECT_INIT (&field.value, type, varargs, 0, &err);
|
|
#endif
|
|
if (G_UNLIKELY (err)) {
|
|
g_critical ("%s", err);
|
|
return;
|
|
}
|
|
gst_structure_set_field (structure, &field);
|
|
|
|
fieldname = va_arg (varargs, GQuark);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_structure_id_set:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the GQuark for the name of the field to set
|
|
* @...: variable arguments
|
|
*
|
|
* Identical to gst_structure_set, except that field names are
|
|
* passed using the GQuark for the field name. This allows more efficient
|
|
* setting of the structure if the caller already knows the associated
|
|
* quark values.
|
|
* The last variable argument must be NULL.
|
|
*
|
|
* Since: 0.10.10
|
|
*/
|
|
void
|
|
gst_structure_id_set (GstStructure * structure, GQuark field, ...)
|
|
{
|
|
va_list varargs;
|
|
|
|
g_return_if_fail (structure != NULL);
|
|
|
|
va_start (varargs, field);
|
|
gst_structure_id_set_valist_internal (structure, field, varargs);
|
|
va_end (varargs);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_id_set_valist:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of the field to set
|
|
* @varargs: variable arguments
|
|
*
|
|
* va_list form of gst_structure_id_set().
|
|
*
|
|
* Since: 0.10.10
|
|
*/
|
|
void
|
|
gst_structure_id_set_valist (GstStructure * structure,
|
|
GQuark fieldname, va_list varargs)
|
|
{
|
|
g_return_if_fail (structure != NULL);
|
|
g_return_if_fail (IS_MUTABLE (structure));
|
|
|
|
gst_structure_id_set_valist_internal (structure, fieldname, varargs);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_new_id:
|
|
* @name_quark: name of new structure
|
|
* @field_quark: the GQuark for the name of the field to set
|
|
* @...: variable arguments
|
|
*
|
|
* Creates a new #GstStructure with the given name as a GQuark, followed by
|
|
* fieldname quark, GType, argument(s) "triplets" in the same format as
|
|
* gst_structure_id_set(). Basically a convenience wrapper around
|
|
* gst_structure_new_id_empty() and gst_structure_id_set().
|
|
*
|
|
* The last variable argument must be NULL (or 0).
|
|
*
|
|
* Free-function: gst_structure_free
|
|
*
|
|
* Returns: (transfer full): a new #GstStructure
|
|
*
|
|
* Since: 0.10.24
|
|
*/
|
|
GstStructure *
|
|
gst_structure_new_id (GQuark name_quark, GQuark field_quark, ...)
|
|
{
|
|
GstStructure *s;
|
|
va_list varargs;
|
|
|
|
g_return_val_if_fail (name_quark != 0, NULL);
|
|
g_return_val_if_fail (field_quark != 0, NULL);
|
|
|
|
s = gst_structure_new_id_empty (name_quark);
|
|
|
|
va_start (varargs, field_quark);
|
|
gst_structure_id_set_valist_internal (s, field_quark, varargs);
|
|
va_end (varargs);
|
|
|
|
return s;
|
|
}
|
|
|
|
#if GST_VERSION_NANO == 1
|
|
#define GIT_G_WARNING g_warning
|
|
#else
|
|
#define GIT_G_WARNING GST_WARNING
|
|
#endif
|
|
|
|
/* If the structure currently contains a field with the same name, it is
|
|
* replaced with the provided field. Otherwise, the field is added to the
|
|
* structure. The field's value is not deeply copied.
|
|
*/
|
|
static void
|
|
gst_structure_set_field (GstStructure * structure, GstStructureField * field)
|
|
{
|
|
GstStructureField *f;
|
|
guint i, len = GST_STRUCTURE_FIELDS (structure)->len;
|
|
|
|
if (G_UNLIKELY (G_VALUE_HOLDS_STRING (&field->value))) {
|
|
const gchar *s;
|
|
|
|
s = g_value_get_string (&field->value);
|
|
/* only check for NULL strings in taglists, as they are allowed in message
|
|
* structs, e.g. error message debug strings */
|
|
if (G_UNLIKELY (IS_TAGLIST (structure) && (s == NULL || *s == '\0'))) {
|
|
if (s == NULL) {
|
|
GIT_G_WARNING ("Trying to set NULL string on field '%s' on taglist. "
|
|
"Please file a bug.", g_quark_to_string (field->name));
|
|
g_value_unset (&field->value);
|
|
return;
|
|
} else {
|
|
/* empty strings never make sense */
|
|
GIT_G_WARNING ("Trying to set empty string on taglist field '%s'. "
|
|
"Please file a bug.", g_quark_to_string (field->name));
|
|
g_value_unset (&field->value);
|
|
return;
|
|
}
|
|
} else if (G_UNLIKELY (s != NULL && !g_utf8_validate (s, -1, NULL))) {
|
|
g_warning ("Trying to set string on %s field '%s', but string is not "
|
|
"valid UTF-8. Please file a bug.",
|
|
IS_TAGLIST (structure) ? "taglist" : "structure",
|
|
g_quark_to_string (field->name));
|
|
g_value_unset (&field->value);
|
|
return;
|
|
}
|
|
} else if (G_UNLIKELY (GST_VALUE_HOLDS_DATE (&field->value))) {
|
|
const GDate *d;
|
|
|
|
d = gst_value_get_date (&field->value);
|
|
/* only check for NULL GDates in taglists, as they might make sense
|
|
* in other, generic structs */
|
|
if (G_UNLIKELY ((IS_TAGLIST (structure) && d == NULL))) {
|
|
GIT_G_WARNING ("Trying to set NULL GDate on field '%s' on taglist. "
|
|
"Please file a bug.", g_quark_to_string (field->name));
|
|
g_value_unset (&field->value);
|
|
return;
|
|
} else if (G_UNLIKELY (d != NULL && !g_date_valid (d))) {
|
|
g_warning
|
|
("Trying to set invalid GDate on %s field '%s'. Please file a bug.",
|
|
IS_TAGLIST (structure) ? "taglist" : "structure",
|
|
g_quark_to_string (field->name));
|
|
g_value_unset (&field->value);
|
|
return;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < len; i++) {
|
|
f = GST_STRUCTURE_FIELD (structure, i);
|
|
|
|
if (G_UNLIKELY (f->name == field->name)) {
|
|
g_value_unset (&f->value);
|
|
memcpy (f, field, sizeof (GstStructureField));
|
|
return;
|
|
}
|
|
}
|
|
|
|
g_array_append_val (GST_STRUCTURE_FIELDS (structure), *field);
|
|
}
|
|
|
|
/* If there is no field with the given ID, NULL is returned.
|
|
*/
|
|
static GstStructureField *
|
|
gst_structure_id_get_field (const GstStructure * structure, GQuark field_id)
|
|
{
|
|
GstStructureField *field;
|
|
guint i, len;
|
|
|
|
len = GST_STRUCTURE_FIELDS (structure)->len;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
field = GST_STRUCTURE_FIELD (structure, i);
|
|
|
|
if (G_UNLIKELY (field->name == field_id))
|
|
return field;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* If there is no field with the given ID, NULL is returned.
|
|
*/
|
|
static GstStructureField *
|
|
gst_structure_get_field (const GstStructure * structure,
|
|
const gchar * fieldname)
|
|
{
|
|
g_return_val_if_fail (structure != NULL, NULL);
|
|
g_return_val_if_fail (fieldname != NULL, NULL);
|
|
|
|
return gst_structure_id_get_field (structure,
|
|
g_quark_from_string (fieldname));
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_value:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of the field to get
|
|
*
|
|
* Get the value of the field with name @fieldname.
|
|
*
|
|
* Returns: the #GValue corresponding to the field with the given name.
|
|
*/
|
|
const GValue *
|
|
gst_structure_get_value (const GstStructure * structure,
|
|
const gchar * fieldname)
|
|
{
|
|
GstStructureField *field;
|
|
|
|
g_return_val_if_fail (structure != NULL, NULL);
|
|
g_return_val_if_fail (fieldname != NULL, NULL);
|
|
|
|
field = gst_structure_get_field (structure, fieldname);
|
|
if (field == NULL)
|
|
return NULL;
|
|
|
|
return &field->value;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_id_get_value:
|
|
* @structure: a #GstStructure
|
|
* @field: the #GQuark of the field to get
|
|
*
|
|
* Get the value of the field with GQuark @field.
|
|
*
|
|
* Returns: the #GValue corresponding to the field with the given name
|
|
* identifier.
|
|
*/
|
|
const GValue *
|
|
gst_structure_id_get_value (const GstStructure * structure, GQuark field)
|
|
{
|
|
GstStructureField *gsfield;
|
|
|
|
g_return_val_if_fail (structure != NULL, NULL);
|
|
|
|
gsfield = gst_structure_id_get_field (structure, field);
|
|
if (gsfield == NULL)
|
|
return NULL;
|
|
|
|
return &gsfield->value;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_remove_field:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of the field to remove
|
|
*
|
|
* Removes the field with the given name. If the field with the given
|
|
* name does not exist, the structure is unchanged.
|
|
*/
|
|
void
|
|
gst_structure_remove_field (GstStructure * structure, const gchar * fieldname)
|
|
{
|
|
GstStructureField *field;
|
|
GQuark id;
|
|
guint i, len;
|
|
|
|
g_return_if_fail (structure != NULL);
|
|
g_return_if_fail (fieldname != NULL);
|
|
g_return_if_fail (IS_MUTABLE (structure));
|
|
|
|
id = g_quark_from_string (fieldname);
|
|
len = GST_STRUCTURE_FIELDS (structure)->len;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
field = GST_STRUCTURE_FIELD (structure, i);
|
|
|
|
if (field->name == id) {
|
|
if (G_IS_VALUE (&field->value)) {
|
|
g_value_unset (&field->value);
|
|
}
|
|
GST_STRUCTURE_FIELDS (structure) =
|
|
g_array_remove_index (GST_STRUCTURE_FIELDS (structure), i);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_structure_remove_fields:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of the field to remove
|
|
* @...: NULL-terminated list of more fieldnames to remove
|
|
*
|
|
* Removes the fields with the given names. If a field does not exist, the
|
|
* argument is ignored.
|
|
*/
|
|
void
|
|
gst_structure_remove_fields (GstStructure * structure,
|
|
const gchar * fieldname, ...)
|
|
{
|
|
va_list varargs;
|
|
|
|
g_return_if_fail (structure != NULL);
|
|
g_return_if_fail (fieldname != NULL);
|
|
/* mutability checked in remove_field */
|
|
|
|
va_start (varargs, fieldname);
|
|
gst_structure_remove_fields_valist (structure, fieldname, varargs);
|
|
va_end (varargs);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_remove_fields_valist:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of the field to remove
|
|
* @varargs: NULL-terminated list of more fieldnames to remove
|
|
*
|
|
* va_list form of gst_structure_remove_fields().
|
|
*/
|
|
void
|
|
gst_structure_remove_fields_valist (GstStructure * structure,
|
|
const gchar * fieldname, va_list varargs)
|
|
{
|
|
gchar *field = (gchar *) fieldname;
|
|
|
|
g_return_if_fail (structure != NULL);
|
|
g_return_if_fail (fieldname != NULL);
|
|
/* mutability checked in remove_field */
|
|
|
|
while (field) {
|
|
gst_structure_remove_field (structure, field);
|
|
field = va_arg (varargs, char *);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_structure_remove_all_fields:
|
|
* @structure: a #GstStructure
|
|
*
|
|
* Removes all fields in a GstStructure.
|
|
*/
|
|
void
|
|
gst_structure_remove_all_fields (GstStructure * structure)
|
|
{
|
|
GstStructureField *field;
|
|
int i;
|
|
|
|
g_return_if_fail (structure != NULL);
|
|
g_return_if_fail (IS_MUTABLE (structure));
|
|
|
|
for (i = GST_STRUCTURE_FIELDS (structure)->len - 1; i >= 0; i--) {
|
|
field = GST_STRUCTURE_FIELD (structure, i);
|
|
|
|
if (G_IS_VALUE (&field->value)) {
|
|
g_value_unset (&field->value);
|
|
}
|
|
GST_STRUCTURE_FIELDS (structure) =
|
|
g_array_remove_index (GST_STRUCTURE_FIELDS (structure), i);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_field_type:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of the field
|
|
*
|
|
* Finds the field with the given name, and returns the type of the
|
|
* value it contains. If the field is not found, G_TYPE_INVALID is
|
|
* returned.
|
|
*
|
|
* Returns: the #GValue of the field
|
|
*/
|
|
GType
|
|
gst_structure_get_field_type (const GstStructure * structure,
|
|
const gchar * fieldname)
|
|
{
|
|
GstStructureField *field;
|
|
|
|
g_return_val_if_fail (structure != NULL, G_TYPE_INVALID);
|
|
g_return_val_if_fail (fieldname != NULL, G_TYPE_INVALID);
|
|
|
|
field = gst_structure_get_field (structure, fieldname);
|
|
if (field == NULL)
|
|
return G_TYPE_INVALID;
|
|
|
|
return G_VALUE_TYPE (&field->value);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_n_fields:
|
|
* @structure: a #GstStructure
|
|
*
|
|
* Get the number of fields in the structure.
|
|
*
|
|
* Returns: the number of fields in the structure
|
|
*/
|
|
gint
|
|
gst_structure_n_fields (const GstStructure * structure)
|
|
{
|
|
g_return_val_if_fail (structure != NULL, 0);
|
|
|
|
return GST_STRUCTURE_FIELDS (structure)->len;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_nth_field_name:
|
|
* @structure: a #GstStructure
|
|
* @index: the index to get the name of
|
|
*
|
|
* Get the name of the given field number, counting from 0 onwards.
|
|
*
|
|
* Returns: the name of the given field number
|
|
*/
|
|
const gchar *
|
|
gst_structure_nth_field_name (const GstStructure * structure, guint index)
|
|
{
|
|
GstStructureField *field;
|
|
|
|
g_return_val_if_fail (structure != NULL, NULL);
|
|
g_return_val_if_fail (index < GST_STRUCTURE_FIELDS (structure)->len, NULL);
|
|
|
|
field = GST_STRUCTURE_FIELD (structure, index);
|
|
|
|
return g_quark_to_string (field->name);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_foreach:
|
|
* @structure: a #GstStructure
|
|
* @func: (scope call): a function to call for each field
|
|
* @user_data: (closure): private data
|
|
*
|
|
* Calls the provided function once for each field in the #GstStructure. The
|
|
* function must not modify the fields. Also see gst_structure_map_in_place().
|
|
*
|
|
* Returns: TRUE if the supplied function returns TRUE For each of the fields,
|
|
* FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
gst_structure_foreach (const GstStructure * structure,
|
|
GstStructureForeachFunc func, gpointer user_data)
|
|
{
|
|
guint i, len;
|
|
GstStructureField *field;
|
|
gboolean ret;
|
|
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (func != NULL, FALSE);
|
|
|
|
len = GST_STRUCTURE_FIELDS (structure)->len;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
field = GST_STRUCTURE_FIELD (structure, i);
|
|
|
|
ret = func (field->name, &field->value, user_data);
|
|
if (G_UNLIKELY (!ret))
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_map_in_place:
|
|
* @structure: a #GstStructure
|
|
* @func: (scope call): a function to call for each field
|
|
* @user_data: (closure): private data
|
|
*
|
|
* Calls the provided function once for each field in the #GstStructure. In
|
|
* contrast to gst_structure_foreach(), the function may modify but not delete the
|
|
* fields. The structure must be mutable.
|
|
*
|
|
* Returns: TRUE if the supplied function returns TRUE For each of the fields,
|
|
* FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
gst_structure_map_in_place (GstStructure * structure,
|
|
GstStructureMapFunc func, gpointer user_data)
|
|
{
|
|
guint i, len;
|
|
GstStructureField *field;
|
|
gboolean ret;
|
|
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (IS_MUTABLE (structure), FALSE);
|
|
g_return_val_if_fail (func != NULL, FALSE);
|
|
len = GST_STRUCTURE_FIELDS (structure)->len;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
field = GST_STRUCTURE_FIELD (structure, i);
|
|
|
|
ret = func (field->name, &field->value, user_data);
|
|
if (!ret)
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_id_has_field:
|
|
* @structure: a #GstStructure
|
|
* @field: #GQuark of the field name
|
|
*
|
|
* Check if @structure contains a field named @field.
|
|
*
|
|
* Returns: TRUE if the structure contains a field with the given name
|
|
*
|
|
* Since: 0.10.26
|
|
*/
|
|
gboolean
|
|
gst_structure_id_has_field (const GstStructure * structure, GQuark field)
|
|
{
|
|
GstStructureField *f;
|
|
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (field != 0, FALSE);
|
|
|
|
f = gst_structure_id_get_field (structure, field);
|
|
|
|
return (f != NULL);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_has_field:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
*
|
|
* Check if @structure contains a field named @fieldname.
|
|
*
|
|
* Returns: TRUE if the structure contains a field with the given name
|
|
*/
|
|
gboolean
|
|
gst_structure_has_field (const GstStructure * structure,
|
|
const gchar * fieldname)
|
|
{
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (fieldname != NULL, FALSE);
|
|
|
|
return gst_structure_id_has_field (structure,
|
|
g_quark_from_string (fieldname));
|
|
}
|
|
|
|
/**
|
|
* gst_structure_id_has_field_typed:
|
|
* @structure: a #GstStructure
|
|
* @field: #GQuark of the field name
|
|
* @type: the type of a value
|
|
*
|
|
* Check if @structure contains a field named @field and with GType @type.
|
|
*
|
|
* Returns: TRUE if the structure contains a field with the given name and type
|
|
*
|
|
* Since: 0.10.26
|
|
*/
|
|
gboolean
|
|
gst_structure_id_has_field_typed (const GstStructure * structure,
|
|
GQuark field, GType type)
|
|
{
|
|
GstStructureField *f;
|
|
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (field != 0, FALSE);
|
|
|
|
f = gst_structure_id_get_field (structure, field);
|
|
if (f == NULL)
|
|
return FALSE;
|
|
|
|
return (G_VALUE_TYPE (&f->value) == type);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_has_field_typed:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
* @type: the type of a value
|
|
*
|
|
* Check if @structure contains a field named @fieldname and with GType @type.
|
|
*
|
|
* Returns: TRUE if the structure contains a field with the given name and type
|
|
*/
|
|
gboolean
|
|
gst_structure_has_field_typed (const GstStructure * structure,
|
|
const gchar * fieldname, GType type)
|
|
{
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (fieldname != NULL, FALSE);
|
|
|
|
return gst_structure_id_has_field_typed (structure,
|
|
g_quark_from_string (fieldname), type);
|
|
}
|
|
|
|
/* utility functions */
|
|
|
|
/**
|
|
* gst_structure_get_boolean:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
* @value: (out): a pointer to a #gboolean to set
|
|
*
|
|
* Sets the boolean pointed to by @value corresponding to the value of the
|
|
* given field. Caller is responsible for making sure the field exists
|
|
* and has the correct type.
|
|
*
|
|
* Returns: TRUE if the value could be set correctly. If there was no field
|
|
* with @fieldname or the existing field did not contain a boolean, this
|
|
* function returns FALSE.
|
|
*/
|
|
gboolean
|
|
gst_structure_get_boolean (const GstStructure * structure,
|
|
const gchar * fieldname, gboolean * value)
|
|
{
|
|
GstStructureField *field;
|
|
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (fieldname != NULL, FALSE);
|
|
|
|
field = gst_structure_get_field (structure, fieldname);
|
|
|
|
if (field == NULL)
|
|
return FALSE;
|
|
if (!G_VALUE_HOLDS_BOOLEAN (&field->value))
|
|
return FALSE;
|
|
|
|
*value = gst_g_value_get_boolean_unchecked (&field->value);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_int:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
* @value: (out): a pointer to an int to set
|
|
*
|
|
* Sets the int pointed to by @value corresponding to the value of the
|
|
* given field. Caller is responsible for making sure the field exists
|
|
* and has the correct type.
|
|
*
|
|
* Returns: %TRUE if the value could be set correctly. If there was no field
|
|
* with @fieldname or the existing field did not contain an int, this function
|
|
* returns %FALSE.
|
|
*/
|
|
gboolean
|
|
gst_structure_get_int (const GstStructure * structure,
|
|
const gchar * fieldname, gint * value)
|
|
{
|
|
GstStructureField *field;
|
|
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (fieldname != NULL, FALSE);
|
|
g_return_val_if_fail (value != NULL, FALSE);
|
|
|
|
field = gst_structure_get_field (structure, fieldname);
|
|
|
|
if (field == NULL)
|
|
return FALSE;
|
|
if (!G_VALUE_HOLDS_INT (&field->value))
|
|
return FALSE;
|
|
|
|
*value = gst_g_value_get_int_unchecked (&field->value);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_uint:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
* @value: (out): a pointer to a uint to set
|
|
*
|
|
* Sets the uint pointed to by @value corresponding to the value of the
|
|
* given field. Caller is responsible for making sure the field exists
|
|
* and has the correct type.
|
|
*
|
|
* Returns: %TRUE if the value could be set correctly. If there was no field
|
|
* with @fieldname or the existing field did not contain a uint, this function
|
|
* returns %FALSE.
|
|
*
|
|
* Since: 0.10.15
|
|
*/
|
|
gboolean
|
|
gst_structure_get_uint (const GstStructure * structure,
|
|
const gchar * fieldname, guint * value)
|
|
{
|
|
GstStructureField *field;
|
|
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (fieldname != NULL, FALSE);
|
|
g_return_val_if_fail (value != NULL, FALSE);
|
|
|
|
field = gst_structure_get_field (structure, fieldname);
|
|
|
|
if (field == NULL)
|
|
return FALSE;
|
|
if (!G_VALUE_HOLDS_UINT (&field->value))
|
|
return FALSE;
|
|
|
|
*value = gst_g_value_get_uint_unchecked (&field->value);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_date:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
* @value: (out callee-allocates): a pointer to a #GDate to set
|
|
*
|
|
* Sets the date pointed to by @value corresponding to the date of the
|
|
* given field. Caller is responsible for making sure the field exists
|
|
* and has the correct type.
|
|
*
|
|
* On success @value will point to a newly-allocated copy of the date which
|
|
* should be freed with g_date_free() when no longer needed (note: this is
|
|
* inconsistent with e.g. gst_structure_get_string() which doesn't return a
|
|
* copy of the string).
|
|
*
|
|
* Returns: TRUE if the value could be set correctly. If there was no field
|
|
* with @fieldname or the existing field did not contain a data, this function
|
|
* returns FALSE.
|
|
*/
|
|
gboolean
|
|
gst_structure_get_date (const GstStructure * structure, const gchar * fieldname,
|
|
GDate ** value)
|
|
{
|
|
GstStructureField *field;
|
|
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (fieldname != NULL, FALSE);
|
|
g_return_val_if_fail (value != NULL, FALSE);
|
|
|
|
field = gst_structure_get_field (structure, fieldname);
|
|
|
|
if (field == NULL)
|
|
return FALSE;
|
|
if (!GST_VALUE_HOLDS_DATE (&field->value))
|
|
return FALSE;
|
|
|
|
/* FIXME: 0.11 g_value_dup_boxed() -> g_value_get_boxed() */
|
|
*value = g_value_dup_boxed (&field->value);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_date_time:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
* @value: (out callee-allocates): a pointer to a #GstDateTime to set
|
|
*
|
|
* Sets the datetime pointed to by @value corresponding to the datetime of the
|
|
* given field. Caller is responsible for making sure the field exists
|
|
* and has the correct type.
|
|
*
|
|
* On success @value will point to a reference of the datetime which
|
|
* should be unreffed with gst_date_time_unref() when no longer needed
|
|
* (note: this is inconsistent with e.g. gst_structure_get_string()
|
|
* which doesn't return a copy of the string).
|
|
*
|
|
* Returns: TRUE if the value could be set correctly. If there was no field
|
|
* with @fieldname or the existing field did not contain a data, this function
|
|
* returns FALSE.
|
|
*
|
|
* Since: 0.10.31
|
|
*/
|
|
gboolean
|
|
gst_structure_get_date_time (const GstStructure * structure,
|
|
const gchar * fieldname, GstDateTime ** value)
|
|
{
|
|
GstStructureField *field;
|
|
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (fieldname != NULL, FALSE);
|
|
g_return_val_if_fail (value != NULL, FALSE);
|
|
|
|
field = gst_structure_get_field (structure, fieldname);
|
|
|
|
if (field == NULL)
|
|
return FALSE;
|
|
if (!GST_VALUE_HOLDS_DATE_TIME (&field->value))
|
|
return FALSE;
|
|
|
|
/* FIXME: 0.11 g_value_dup_boxed() -> g_value_get_boxed() */
|
|
*value = g_value_dup_boxed (&field->value);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_clock_time:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
* @value: (out): a pointer to a #GstClockTime to set
|
|
*
|
|
* Sets the clock time pointed to by @value corresponding to the clock time
|
|
* of the given field. Caller is responsible for making sure the field exists
|
|
* and has the correct type.
|
|
*
|
|
* Returns: TRUE if the value could be set correctly. If there was no field
|
|
* with @fieldname or the existing field did not contain a #GstClockTime, this
|
|
* function returns FALSE.
|
|
*/
|
|
gboolean
|
|
gst_structure_get_clock_time (const GstStructure * structure,
|
|
const gchar * fieldname, GstClockTime * value)
|
|
{
|
|
GstStructureField *field;
|
|
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (fieldname != NULL, FALSE);
|
|
g_return_val_if_fail (value != NULL, FALSE);
|
|
|
|
field = gst_structure_get_field (structure, fieldname);
|
|
|
|
if (field == NULL)
|
|
return FALSE;
|
|
if (!G_VALUE_HOLDS_UINT64 (&field->value))
|
|
return FALSE;
|
|
|
|
*value = gst_g_value_get_uint64_unchecked (&field->value);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_double:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
* @value: (out): a pointer to a gdouble to set
|
|
*
|
|
* Sets the double pointed to by @value corresponding to the value of the
|
|
* given field. Caller is responsible for making sure the field exists
|
|
* and has the correct type.
|
|
*
|
|
* Returns: TRUE if the value could be set correctly. If there was no field
|
|
* with @fieldname or the existing field did not contain a double, this
|
|
* function returns FALSE.
|
|
*/
|
|
gboolean
|
|
gst_structure_get_double (const GstStructure * structure,
|
|
const gchar * fieldname, gdouble * value)
|
|
{
|
|
GstStructureField *field;
|
|
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (fieldname != NULL, FALSE);
|
|
g_return_val_if_fail (value != NULL, FALSE);
|
|
|
|
field = gst_structure_get_field (structure, fieldname);
|
|
|
|
if (field == NULL)
|
|
return FALSE;
|
|
if (!G_VALUE_HOLDS_DOUBLE (&field->value))
|
|
return FALSE;
|
|
|
|
*value = gst_g_value_get_double_unchecked (&field->value);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_string:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
*
|
|
* Finds the field corresponding to @fieldname, and returns the string
|
|
* contained in the field's value. Caller is responsible for making
|
|
* sure the field exists and has the correct type.
|
|
*
|
|
* The string should not be modified, and remains valid until the next
|
|
* call to a gst_structure_*() function with the given structure.
|
|
*
|
|
* Returns: a pointer to the string or NULL when the field did not exist
|
|
* or did not contain a string.
|
|
*/
|
|
const gchar *
|
|
gst_structure_get_string (const GstStructure * structure,
|
|
const gchar * fieldname)
|
|
{
|
|
GstStructureField *field;
|
|
|
|
g_return_val_if_fail (structure != NULL, NULL);
|
|
g_return_val_if_fail (fieldname != NULL, NULL);
|
|
|
|
field = gst_structure_get_field (structure, fieldname);
|
|
|
|
if (field == NULL)
|
|
return NULL;
|
|
if (!G_VALUE_HOLDS_STRING (&field->value))
|
|
return NULL;
|
|
|
|
return gst_g_value_get_string_unchecked (&field->value);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_enum:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
* @enumtype: the enum type of a field
|
|
* @value: (out): a pointer to an int to set
|
|
*
|
|
* Sets the int pointed to by @value corresponding to the value of the
|
|
* given field. Caller is responsible for making sure the field exists,
|
|
* has the correct type and that the enumtype is correct.
|
|
*
|
|
* Returns: TRUE if the value could be set correctly. If there was no field
|
|
* with @fieldname or the existing field did not contain an enum of the given
|
|
* type, this function returns FALSE.
|
|
*/
|
|
gboolean
|
|
gst_structure_get_enum (const GstStructure * structure,
|
|
const gchar * fieldname, GType enumtype, gint * value)
|
|
{
|
|
GstStructureField *field;
|
|
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (fieldname != NULL, FALSE);
|
|
g_return_val_if_fail (enumtype != G_TYPE_INVALID, FALSE);
|
|
g_return_val_if_fail (value != NULL, FALSE);
|
|
|
|
field = gst_structure_get_field (structure, fieldname);
|
|
|
|
if (field == NULL)
|
|
return FALSE;
|
|
if (!G_TYPE_CHECK_VALUE_TYPE (&field->value, enumtype))
|
|
return FALSE;
|
|
|
|
*value = g_value_get_enum (&field->value);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_fraction:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
* @value_numerator: (out): a pointer to an int to set
|
|
* @value_denominator: (out): a pointer to an int to set
|
|
*
|
|
* Sets the integers pointed to by @value_numerator and @value_denominator
|
|
* corresponding to the value of the given field. Caller is responsible
|
|
* for making sure the field exists and has the correct type.
|
|
*
|
|
* Returns: TRUE if the values could be set correctly. If there was no field
|
|
* with @fieldname or the existing field did not contain a GstFraction, this
|
|
* function returns FALSE.
|
|
*/
|
|
gboolean
|
|
gst_structure_get_fraction (const GstStructure * structure,
|
|
const gchar * fieldname, gint * value_numerator, gint * value_denominator)
|
|
{
|
|
GstStructureField *field;
|
|
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (fieldname != NULL, FALSE);
|
|
g_return_val_if_fail (value_numerator != NULL, FALSE);
|
|
g_return_val_if_fail (value_denominator != NULL, FALSE);
|
|
|
|
field = gst_structure_get_field (structure, fieldname);
|
|
|
|
if (field == NULL)
|
|
return FALSE;
|
|
if (!GST_VALUE_HOLDS_FRACTION (&field->value))
|
|
return FALSE;
|
|
|
|
*value_numerator = gst_value_get_fraction_numerator (&field->value);
|
|
*value_denominator = gst_value_get_fraction_denominator (&field->value);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
typedef struct _GstStructureAbbreviation
|
|
{
|
|
const gchar *type_name;
|
|
GType type;
|
|
}
|
|
GstStructureAbbreviation;
|
|
|
|
/* return a copy of an array of GstStructureAbbreviation containing all the
|
|
* known type_string, GType maps, including abbreviations for common types */
|
|
static GstStructureAbbreviation *
|
|
gst_structure_get_abbrs (gint * n_abbrs)
|
|
{
|
|
static GstStructureAbbreviation *abbrs = NULL;
|
|
static volatile gsize num = 0;
|
|
|
|
if (g_once_init_enter (&num)) {
|
|
/* dynamically generate the array */
|
|
gsize _num;
|
|
GstStructureAbbreviation dyn_abbrs[] = {
|
|
{"int", G_TYPE_INT}
|
|
,
|
|
{"i", G_TYPE_INT}
|
|
,
|
|
{"uint", G_TYPE_UINT}
|
|
,
|
|
{"u", G_TYPE_UINT}
|
|
,
|
|
{"float", G_TYPE_FLOAT}
|
|
,
|
|
{"f", G_TYPE_FLOAT}
|
|
,
|
|
{"double", G_TYPE_DOUBLE}
|
|
,
|
|
{"d", G_TYPE_DOUBLE}
|
|
,
|
|
{"buffer", GST_TYPE_BUFFER}
|
|
,
|
|
{"fraction", GST_TYPE_FRACTION}
|
|
,
|
|
{"boolean", G_TYPE_BOOLEAN}
|
|
,
|
|
{"bool", G_TYPE_BOOLEAN}
|
|
,
|
|
{"b", G_TYPE_BOOLEAN}
|
|
,
|
|
{"string", G_TYPE_STRING}
|
|
,
|
|
{"str", G_TYPE_STRING}
|
|
,
|
|
{"s", G_TYPE_STRING}
|
|
,
|
|
{"structure", GST_TYPE_STRUCTURE}
|
|
,
|
|
{"date", GST_TYPE_DATE}
|
|
,
|
|
{"datetime", GST_TYPE_DATE_TIME}
|
|
};
|
|
_num = G_N_ELEMENTS (dyn_abbrs);
|
|
/* permanently allocate and copy the array now */
|
|
abbrs = g_new0 (GstStructureAbbreviation, _num);
|
|
memcpy (abbrs, dyn_abbrs, sizeof (GstStructureAbbreviation) * _num);
|
|
g_once_init_leave (&num, _num);
|
|
}
|
|
*n_abbrs = num;
|
|
|
|
return abbrs;
|
|
}
|
|
|
|
/* given a type_name that could be a type abbreviation or a registered GType,
|
|
* return a matching GType */
|
|
static GType
|
|
gst_structure_gtype_from_abbr (const char *type_name)
|
|
{
|
|
int i;
|
|
GstStructureAbbreviation *abbrs;
|
|
gint n_abbrs;
|
|
|
|
g_return_val_if_fail (type_name != NULL, G_TYPE_INVALID);
|
|
|
|
abbrs = gst_structure_get_abbrs (&n_abbrs);
|
|
|
|
for (i = 0; i < n_abbrs; i++) {
|
|
if (strcmp (type_name, abbrs[i].type_name) == 0) {
|
|
return abbrs[i].type;
|
|
}
|
|
}
|
|
|
|
/* this is the fallback */
|
|
return g_type_from_name (type_name);
|
|
}
|
|
|
|
static const char *
|
|
gst_structure_to_abbr (GType type)
|
|
{
|
|
int i;
|
|
GstStructureAbbreviation *abbrs;
|
|
gint n_abbrs;
|
|
|
|
g_return_val_if_fail (type != G_TYPE_INVALID, NULL);
|
|
|
|
abbrs = gst_structure_get_abbrs (&n_abbrs);
|
|
|
|
for (i = 0; i < n_abbrs; i++) {
|
|
if (type == abbrs[i].type) {
|
|
return abbrs[i].type_name;
|
|
}
|
|
}
|
|
|
|
return g_type_name (type);
|
|
}
|
|
|
|
static GType
|
|
gst_structure_value_get_generic_type (GValue * val)
|
|
{
|
|
if (G_VALUE_TYPE (val) == GST_TYPE_LIST
|
|
|| G_VALUE_TYPE (val) == GST_TYPE_ARRAY) {
|
|
GArray *array = g_value_peek_pointer (val);
|
|
|
|
if (array->len > 0) {
|
|
GValue *value = &g_array_index (array, GValue, 0);
|
|
|
|
return gst_structure_value_get_generic_type (value);
|
|
} else {
|
|
return G_TYPE_INT;
|
|
}
|
|
} else if (G_VALUE_TYPE (val) == GST_TYPE_INT_RANGE) {
|
|
return G_TYPE_INT;
|
|
} else if (G_VALUE_TYPE (val) == GST_TYPE_INT64_RANGE) {
|
|
return G_TYPE_INT64;
|
|
} else if (G_VALUE_TYPE (val) == GST_TYPE_DOUBLE_RANGE) {
|
|
return G_TYPE_DOUBLE;
|
|
} else if (G_VALUE_TYPE (val) == GST_TYPE_FRACTION_RANGE) {
|
|
return GST_TYPE_FRACTION;
|
|
}
|
|
return G_VALUE_TYPE (val);
|
|
}
|
|
|
|
gboolean
|
|
priv_gst_structure_append_to_gstring (const GstStructure * structure,
|
|
GString * s)
|
|
{
|
|
GstStructureField *field;
|
|
guint i, len;
|
|
|
|
g_return_val_if_fail (s != NULL, FALSE);
|
|
|
|
g_string_append (s, g_quark_to_string (structure->name));
|
|
len = GST_STRUCTURE_FIELDS (structure)->len;
|
|
for (i = 0; i < len; i++) {
|
|
char *t;
|
|
GType type;
|
|
|
|
field = GST_STRUCTURE_FIELD (structure, i);
|
|
|
|
t = gst_value_serialize (&field->value);
|
|
type = gst_structure_value_get_generic_type (&field->value);
|
|
|
|
g_string_append_len (s, ", ", 2);
|
|
/* FIXME: do we need to escape fieldnames? */
|
|
g_string_append (s, g_quark_to_string (field->name));
|
|
g_string_append_len (s, "=(", 2);
|
|
g_string_append (s, gst_structure_to_abbr (type));
|
|
g_string_append_c (s, ')');
|
|
g_string_append (s, t == NULL ? "NULL" : t);
|
|
g_free (t);
|
|
}
|
|
|
|
g_string_append_c (s, ';');
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_to_string:
|
|
* @structure: a #GstStructure
|
|
*
|
|
* Converts @structure to a human-readable string representation.
|
|
*
|
|
* For debugging purposes its easier to do something like this:
|
|
* |[
|
|
* GST_LOG ("structure is %" GST_PTR_FORMAT, structure);
|
|
* ]|
|
|
* This prints the structure in human readble form.
|
|
*
|
|
* Free-function: g_free
|
|
*
|
|
* Returns: (transfer full)L a pointer to string allocated by g_malloc().
|
|
* g_free() after usage.
|
|
*/
|
|
gchar *
|
|
gst_structure_to_string (const GstStructure * structure)
|
|
{
|
|
GString *s;
|
|
|
|
/* NOTE: This function is potentially called by the debug system,
|
|
* so any calls to gst_log() (and GST_DEBUG(), GST_LOG(), etc.)
|
|
* should be careful to avoid recursion. This includes any functions
|
|
* called by gst_structure_to_string. In particular, calls should
|
|
* not use the GST_PTR_FORMAT extension. */
|
|
|
|
g_return_val_if_fail (structure != NULL, NULL);
|
|
|
|
/* we estimate a minimum size based on the number of fields in order to
|
|
* avoid unnecessary reallocs within GString */
|
|
s = g_string_sized_new (STRUCTURE_ESTIMATED_STRING_LEN (structure));
|
|
priv_gst_structure_append_to_gstring (structure, s);
|
|
return g_string_free (s, FALSE);
|
|
}
|
|
|
|
/*
|
|
* r will still point to the string. if end == next, the string will not be
|
|
* null-terminated. In all other cases it will be.
|
|
* end = pointer to char behind end of string, next = pointer to start of
|
|
* unread data.
|
|
* THIS FUNCTION MODIFIES THE STRING AND DETECTS INSIDE A NONTERMINATED STRING
|
|
*/
|
|
static gboolean
|
|
gst_structure_parse_string (gchar * s, gchar ** end, gchar ** next,
|
|
gboolean unescape)
|
|
{
|
|
gchar *w;
|
|
|
|
if (*s == 0)
|
|
return FALSE;
|
|
|
|
if (*s != '"') {
|
|
int ret;
|
|
|
|
ret = gst_structure_parse_simple_string (s, end);
|
|
*next = *end;
|
|
|
|
return ret;
|
|
}
|
|
|
|
if (unescape) {
|
|
w = s;
|
|
s++;
|
|
while (*s != '"') {
|
|
if (G_UNLIKELY (*s == 0))
|
|
return FALSE;
|
|
if (G_UNLIKELY (*s == '\\'))
|
|
s++;
|
|
*w = *s;
|
|
w++;
|
|
s++;
|
|
}
|
|
s++;
|
|
} else {
|
|
/* Find the closing quotes */
|
|
s++;
|
|
while (*s != '"') {
|
|
if (G_UNLIKELY (*s == 0))
|
|
return FALSE;
|
|
if (G_UNLIKELY (*s == '\\'))
|
|
s++;
|
|
s++;
|
|
}
|
|
s++;
|
|
w = s;
|
|
}
|
|
|
|
*end = w;
|
|
*next = s;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_structure_parse_range (gchar * s, gchar ** after, GValue * value,
|
|
GType type)
|
|
{
|
|
GValue value1 = { 0 };
|
|
GValue value2 = { 0 };
|
|
GType range_type;
|
|
gboolean ret;
|
|
|
|
if (*s != '[')
|
|
return FALSE;
|
|
s++;
|
|
|
|
ret = gst_structure_parse_value (s, &s, &value1, type);
|
|
if (ret == FALSE)
|
|
return FALSE;
|
|
|
|
while (g_ascii_isspace (*s))
|
|
s++;
|
|
|
|
if (*s != ',')
|
|
return FALSE;
|
|
s++;
|
|
|
|
while (g_ascii_isspace (*s))
|
|
s++;
|
|
|
|
ret = gst_structure_parse_value (s, &s, &value2, type);
|
|
if (ret == FALSE)
|
|
return FALSE;
|
|
|
|
while (g_ascii_isspace (*s))
|
|
s++;
|
|
|
|
if (*s != ']')
|
|
return FALSE;
|
|
s++;
|
|
|
|
if (G_VALUE_TYPE (&value1) != G_VALUE_TYPE (&value2))
|
|
return FALSE;
|
|
|
|
if (G_VALUE_TYPE (&value1) == G_TYPE_DOUBLE) {
|
|
range_type = GST_TYPE_DOUBLE_RANGE;
|
|
g_value_init (value, range_type);
|
|
gst_value_set_double_range (value,
|
|
gst_g_value_get_double_unchecked (&value1),
|
|
gst_g_value_get_double_unchecked (&value2));
|
|
} else if (G_VALUE_TYPE (&value1) == G_TYPE_INT) {
|
|
range_type = GST_TYPE_INT_RANGE;
|
|
g_value_init (value, range_type);
|
|
gst_value_set_int_range (value, gst_g_value_get_int_unchecked (&value1),
|
|
gst_g_value_get_int_unchecked (&value2));
|
|
} else if (G_VALUE_TYPE (&value1) == G_TYPE_INT64) {
|
|
range_type = GST_TYPE_INT64_RANGE;
|
|
g_value_init (value, range_type);
|
|
gst_value_set_int64_range (value, gst_g_value_get_int64_unchecked (&value1),
|
|
gst_g_value_get_int64_unchecked (&value2));
|
|
} else if (G_VALUE_TYPE (&value1) == GST_TYPE_FRACTION) {
|
|
range_type = GST_TYPE_FRACTION_RANGE;
|
|
g_value_init (value, range_type);
|
|
gst_value_set_fraction_range (value, &value1, &value2);
|
|
} else {
|
|
return FALSE;
|
|
}
|
|
|
|
*after = s;
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_structure_parse_any_list (gchar * s, gchar ** after, GValue * value,
|
|
GType type, GType list_type, char begin, char end)
|
|
{
|
|
GValue list_value = { 0 };
|
|
gboolean ret;
|
|
GArray *array;
|
|
|
|
g_value_init (value, list_type);
|
|
array = g_value_peek_pointer (value);
|
|
|
|
if (*s != begin)
|
|
return FALSE;
|
|
s++;
|
|
|
|
while (g_ascii_isspace (*s))
|
|
s++;
|
|
if (*s == end) {
|
|
s++;
|
|
*after = s;
|
|
return TRUE;
|
|
}
|
|
|
|
ret = gst_structure_parse_value (s, &s, &list_value, type);
|
|
if (ret == FALSE)
|
|
return FALSE;
|
|
|
|
g_array_append_val (array, list_value);
|
|
|
|
while (g_ascii_isspace (*s))
|
|
s++;
|
|
|
|
while (*s != end) {
|
|
if (*s != ',')
|
|
return FALSE;
|
|
s++;
|
|
|
|
while (g_ascii_isspace (*s))
|
|
s++;
|
|
|
|
memset (&list_value, 0, sizeof (list_value));
|
|
ret = gst_structure_parse_value (s, &s, &list_value, type);
|
|
if (ret == FALSE)
|
|
return FALSE;
|
|
|
|
g_array_append_val (array, list_value);
|
|
while (g_ascii_isspace (*s))
|
|
s++;
|
|
}
|
|
|
|
s++;
|
|
|
|
*after = s;
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_structure_parse_list (gchar * s, gchar ** after, GValue * value, GType type)
|
|
{
|
|
return gst_structure_parse_any_list (s, after, value, type, GST_TYPE_LIST,
|
|
'{', '}');
|
|
}
|
|
|
|
static gboolean
|
|
gst_structure_parse_array (gchar * s, gchar ** after, GValue * value,
|
|
GType type)
|
|
{
|
|
return gst_structure_parse_any_list (s, after, value, type,
|
|
GST_TYPE_ARRAY, '<', '>');
|
|
}
|
|
|
|
static gboolean
|
|
gst_structure_parse_simple_string (gchar * str, gchar ** end)
|
|
{
|
|
char *s = str;
|
|
|
|
while (G_LIKELY (GST_ASCII_IS_STRING (*s))) {
|
|
s++;
|
|
}
|
|
|
|
*end = s;
|
|
|
|
return (s != str);
|
|
}
|
|
|
|
static gboolean
|
|
gst_structure_parse_field (gchar * str,
|
|
gchar ** after, GstStructureField * field)
|
|
{
|
|
gchar *name;
|
|
gchar *name_end;
|
|
gchar *s;
|
|
gchar c;
|
|
|
|
s = str;
|
|
|
|
while (g_ascii_isspace (*s) || (s[0] == '\\' && g_ascii_isspace (s[1])))
|
|
s++;
|
|
name = s;
|
|
if (G_UNLIKELY (!gst_structure_parse_simple_string (s, &name_end))) {
|
|
GST_WARNING ("failed to parse simple string, str=%s", str);
|
|
return FALSE;
|
|
}
|
|
|
|
s = name_end;
|
|
while (g_ascii_isspace (*s) || (s[0] == '\\' && g_ascii_isspace (s[1])))
|
|
s++;
|
|
|
|
if (G_UNLIKELY (*s != '=')) {
|
|
GST_WARNING ("missing assignment operator in the field, str=%s", str);
|
|
return FALSE;
|
|
}
|
|
s++;
|
|
|
|
c = *name_end;
|
|
*name_end = '\0';
|
|
field->name = g_quark_from_string (name);
|
|
GST_DEBUG ("trying field name '%s'", name);
|
|
*name_end = c;
|
|
|
|
if (G_UNLIKELY (!gst_structure_parse_value (s, &s, &field->value,
|
|
G_TYPE_INVALID))) {
|
|
GST_WARNING ("failed to parse value %s", str);
|
|
return FALSE;
|
|
}
|
|
|
|
*after = s;
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_structure_parse_value (gchar * str,
|
|
gchar ** after, GValue * value, GType default_type)
|
|
{
|
|
gchar *type_name;
|
|
gchar *type_end;
|
|
gchar *value_s;
|
|
gchar *value_end;
|
|
gchar *s;
|
|
gchar c;
|
|
int ret = 0;
|
|
GType type = default_type;
|
|
|
|
s = str;
|
|
while (g_ascii_isspace (*s))
|
|
s++;
|
|
|
|
/* check if there's a (type_name) 'cast' */
|
|
type_name = NULL;
|
|
if (*s == '(') {
|
|
s++;
|
|
while (g_ascii_isspace (*s))
|
|
s++;
|
|
type_name = s;
|
|
if (G_UNLIKELY (!gst_structure_parse_simple_string (s, &type_end)))
|
|
return FALSE;
|
|
s = type_end;
|
|
while (g_ascii_isspace (*s))
|
|
s++;
|
|
if (G_UNLIKELY (*s != ')'))
|
|
return FALSE;
|
|
s++;
|
|
while (g_ascii_isspace (*s))
|
|
s++;
|
|
|
|
c = *type_end;
|
|
*type_end = 0;
|
|
type = gst_structure_gtype_from_abbr (type_name);
|
|
GST_DEBUG ("trying type name '%s'", type_name);
|
|
*type_end = c;
|
|
|
|
if (G_UNLIKELY (type == G_TYPE_INVALID)) {
|
|
GST_WARNING ("invalid type");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
while (g_ascii_isspace (*s))
|
|
s++;
|
|
if (*s == '[') {
|
|
ret = gst_structure_parse_range (s, &s, value, type);
|
|
} else if (*s == '{') {
|
|
ret = gst_structure_parse_list (s, &s, value, type);
|
|
} else if (*s == '<') {
|
|
ret = gst_structure_parse_array (s, &s, value, type);
|
|
} else {
|
|
value_s = s;
|
|
|
|
if (G_UNLIKELY (type == G_TYPE_INVALID)) {
|
|
GType try_types[] =
|
|
{ G_TYPE_INT, G_TYPE_DOUBLE, GST_TYPE_FRACTION, G_TYPE_BOOLEAN,
|
|
G_TYPE_STRING
|
|
};
|
|
int i;
|
|
|
|
if (G_UNLIKELY (!gst_structure_parse_string (s, &value_end, &s, TRUE)))
|
|
return FALSE;
|
|
/* Set NULL terminator for deserialization */
|
|
c = *value_end;
|
|
*value_end = '\0';
|
|
|
|
for (i = 0; i < G_N_ELEMENTS (try_types); i++) {
|
|
g_value_init (value, try_types[i]);
|
|
ret = gst_value_deserialize (value, value_s);
|
|
if (ret)
|
|
break;
|
|
g_value_unset (value);
|
|
}
|
|
} else {
|
|
g_value_init (value, type);
|
|
|
|
if (G_UNLIKELY (!gst_structure_parse_string (s, &value_end, &s,
|
|
(type != G_TYPE_STRING))))
|
|
return FALSE;
|
|
/* Set NULL terminator for deserialization */
|
|
c = *value_end;
|
|
*value_end = '\0';
|
|
|
|
ret = gst_value_deserialize (value, value_s);
|
|
if (G_UNLIKELY (!ret))
|
|
g_value_unset (value);
|
|
}
|
|
*value_end = c;
|
|
}
|
|
|
|
*after = s;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_from_string:
|
|
* @string: a string representation of a #GstStructure.
|
|
* @end: (out) (allow-none): pointer to store the end of the string in.
|
|
*
|
|
* Creates a #GstStructure from a string representation.
|
|
* If end is not NULL, a pointer to the place inside the given string
|
|
* where parsing ended will be returned.
|
|
*
|
|
* Free-function: gst_structure_free
|
|
*
|
|
* Returns: (transfer full): a new #GstStructure or NULL when the string could
|
|
* not be parsed. Free with gst_structure_free() after use.
|
|
*/
|
|
GstStructure *
|
|
gst_structure_from_string (const gchar * string, gchar ** end)
|
|
{
|
|
char *name;
|
|
char *copy;
|
|
char *w;
|
|
char *r;
|
|
char save;
|
|
GstStructure *structure = NULL;
|
|
GstStructureField field;
|
|
|
|
g_return_val_if_fail (string != NULL, NULL);
|
|
|
|
copy = g_strdup (string);
|
|
r = copy;
|
|
|
|
/* skip spaces (FIXME: _isspace treats tabs and newlines as space!) */
|
|
while (*r && (g_ascii_isspace (*r) || (r[0] == '\\'
|
|
&& g_ascii_isspace (r[1]))))
|
|
r++;
|
|
|
|
name = r;
|
|
if (G_UNLIKELY (!gst_structure_parse_string (r, &w, &r, TRUE))) {
|
|
GST_WARNING ("Failed to parse structure string '%s'", string);
|
|
goto error;
|
|
}
|
|
|
|
save = *w;
|
|
*w = '\0';
|
|
structure = gst_structure_new_empty (name);
|
|
*w = save;
|
|
|
|
if (G_UNLIKELY (structure == NULL))
|
|
goto error;
|
|
|
|
do {
|
|
while (*r && (g_ascii_isspace (*r) || (r[0] == '\\'
|
|
&& g_ascii_isspace (r[1]))))
|
|
r++;
|
|
if (*r == ';') {
|
|
/* end of structure, get the next char and finish */
|
|
r++;
|
|
break;
|
|
}
|
|
if (*r == '\0') {
|
|
/* accept \0 as end delimiter */
|
|
break;
|
|
}
|
|
if (G_UNLIKELY (*r != ',')) {
|
|
GST_WARNING ("Failed to find delimiter, r=%s", r);
|
|
goto error;
|
|
}
|
|
r++;
|
|
while (*r && (g_ascii_isspace (*r) || (r[0] == '\\'
|
|
&& g_ascii_isspace (r[1]))))
|
|
r++;
|
|
|
|
memset (&field, 0, sizeof (field));
|
|
if (G_UNLIKELY (!gst_structure_parse_field (r, &r, &field))) {
|
|
GST_WARNING ("Failed to parse field, r=%s", r);
|
|
goto error;
|
|
}
|
|
gst_structure_set_field (structure, &field);
|
|
} while (TRUE);
|
|
|
|
if (end)
|
|
*end = (char *) string + (r - copy);
|
|
else if (*r)
|
|
g_warning ("gst_structure_from_string did not consume whole string,"
|
|
" but caller did not provide end pointer (\"%s\")", string);
|
|
|
|
g_free (copy);
|
|
return structure;
|
|
|
|
error:
|
|
if (structure)
|
|
gst_structure_free (structure);
|
|
g_free (copy);
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
gst_structure_transform_to_string (const GValue * src_value,
|
|
GValue * dest_value)
|
|
{
|
|
g_return_if_fail (src_value != NULL);
|
|
g_return_if_fail (dest_value != NULL);
|
|
|
|
dest_value->data[0].v_pointer =
|
|
gst_structure_to_string (src_value->data[0].v_pointer);
|
|
}
|
|
|
|
static GstStructure *
|
|
gst_structure_copy_conditional (const GstStructure * structure)
|
|
{
|
|
if (structure)
|
|
return gst_structure_copy (structure);
|
|
return NULL;
|
|
}
|
|
|
|
/* fixate utility functions */
|
|
|
|
/**
|
|
* gst_structure_fixate_field_nearest_int:
|
|
* @structure: a #GstStructure
|
|
* @field_name: a field in @structure
|
|
* @target: the target value of the fixation
|
|
*
|
|
* Fixates a #GstStructure by changing the given field to the nearest
|
|
* integer to @target that is a subset of the existing field.
|
|
*
|
|
* Returns: TRUE if the structure could be fixated
|
|
*/
|
|
gboolean
|
|
gst_structure_fixate_field_nearest_int (GstStructure * structure,
|
|
const char *field_name, int target)
|
|
{
|
|
const GValue *value;
|
|
|
|
g_return_val_if_fail (gst_structure_has_field (structure, field_name), FALSE);
|
|
g_return_val_if_fail (IS_MUTABLE (structure), FALSE);
|
|
|
|
value = gst_structure_get_value (structure, field_name);
|
|
|
|
if (G_VALUE_TYPE (value) == G_TYPE_INT) {
|
|
/* already fixed */
|
|
return FALSE;
|
|
} else if (G_VALUE_TYPE (value) == GST_TYPE_INT_RANGE) {
|
|
int x;
|
|
|
|
x = gst_value_get_int_range_min (value);
|
|
if (target < x)
|
|
target = x;
|
|
x = gst_value_get_int_range_max (value);
|
|
if (target > x)
|
|
target = x;
|
|
gst_structure_set (structure, field_name, G_TYPE_INT, target, NULL);
|
|
return TRUE;
|
|
} else if (G_VALUE_TYPE (value) == GST_TYPE_LIST) {
|
|
const GValue *list_value;
|
|
int i, n;
|
|
int best = 0;
|
|
int best_index = -1;
|
|
|
|
n = gst_value_list_get_size (value);
|
|
for (i = 0; i < n; i++) {
|
|
list_value = gst_value_list_get_value (value, i);
|
|
if (G_VALUE_TYPE (list_value) == G_TYPE_INT) {
|
|
int x = gst_g_value_get_int_unchecked (list_value);
|
|
|
|
if (best_index == -1 || (ABS (target - x) < ABS (target - best))) {
|
|
best_index = i;
|
|
best = x;
|
|
}
|
|
}
|
|
}
|
|
if (best_index != -1) {
|
|
gst_structure_set (structure, field_name, G_TYPE_INT, best, NULL);
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_fixate_field_nearest_double:
|
|
* @structure: a #GstStructure
|
|
* @field_name: a field in @structure
|
|
* @target: the target value of the fixation
|
|
*
|
|
* Fixates a #GstStructure by changing the given field to the nearest
|
|
* double to @target that is a subset of the existing field.
|
|
*
|
|
* Returns: TRUE if the structure could be fixated
|
|
*/
|
|
gboolean
|
|
gst_structure_fixate_field_nearest_double (GstStructure * structure,
|
|
const char *field_name, double target)
|
|
{
|
|
const GValue *value;
|
|
|
|
g_return_val_if_fail (gst_structure_has_field (structure, field_name), FALSE);
|
|
g_return_val_if_fail (IS_MUTABLE (structure), FALSE);
|
|
|
|
value = gst_structure_get_value (structure, field_name);
|
|
|
|
if (G_VALUE_TYPE (value) == G_TYPE_DOUBLE) {
|
|
/* already fixed */
|
|
return FALSE;
|
|
} else if (G_VALUE_TYPE (value) == GST_TYPE_DOUBLE_RANGE) {
|
|
double x;
|
|
|
|
x = gst_value_get_double_range_min (value);
|
|
if (target < x)
|
|
target = x;
|
|
x = gst_value_get_double_range_max (value);
|
|
if (target > x)
|
|
target = x;
|
|
gst_structure_set (structure, field_name, G_TYPE_DOUBLE, target, NULL);
|
|
return TRUE;
|
|
} else if (G_VALUE_TYPE (value) == GST_TYPE_LIST) {
|
|
const GValue *list_value;
|
|
int i, n;
|
|
double best = 0;
|
|
int best_index = -1;
|
|
|
|
n = gst_value_list_get_size (value);
|
|
for (i = 0; i < n; i++) {
|
|
list_value = gst_value_list_get_value (value, i);
|
|
if (G_VALUE_TYPE (list_value) == G_TYPE_DOUBLE) {
|
|
double x = gst_g_value_get_double_unchecked (list_value);
|
|
|
|
if (best_index == -1 || (ABS (target - x) < ABS (target - best))) {
|
|
best_index = i;
|
|
best = x;
|
|
}
|
|
}
|
|
}
|
|
if (best_index != -1) {
|
|
gst_structure_set (structure, field_name, G_TYPE_DOUBLE, best, NULL);
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
return FALSE;
|
|
|
|
}
|
|
|
|
/**
|
|
* gst_structure_fixate_field_boolean:
|
|
* @structure: a #GstStructure
|
|
* @field_name: a field in @structure
|
|
* @target: the target value of the fixation
|
|
*
|
|
* Fixates a #GstStructure by changing the given @field_name field to the given
|
|
* @target boolean if that field is not fixed yet.
|
|
*
|
|
* Returns: TRUE if the structure could be fixated
|
|
*/
|
|
gboolean
|
|
gst_structure_fixate_field_boolean (GstStructure * structure,
|
|
const char *field_name, gboolean target)
|
|
{
|
|
const GValue *value;
|
|
|
|
g_return_val_if_fail (gst_structure_has_field (structure, field_name), FALSE);
|
|
g_return_val_if_fail (IS_MUTABLE (structure), FALSE);
|
|
|
|
value = gst_structure_get_value (structure, field_name);
|
|
|
|
if (G_VALUE_TYPE (value) == G_TYPE_BOOLEAN) {
|
|
/* already fixed */
|
|
return FALSE;
|
|
} else if (G_VALUE_TYPE (value) == GST_TYPE_LIST) {
|
|
const GValue *list_value;
|
|
int i, n;
|
|
int best = 0;
|
|
int best_index = -1;
|
|
|
|
n = gst_value_list_get_size (value);
|
|
for (i = 0; i < n; i++) {
|
|
list_value = gst_value_list_get_value (value, i);
|
|
if (G_VALUE_TYPE (list_value) == G_TYPE_BOOLEAN) {
|
|
gboolean x = gst_g_value_get_boolean_unchecked (list_value);
|
|
|
|
if (best_index == -1 || x == target) {
|
|
best_index = i;
|
|
best = x;
|
|
}
|
|
}
|
|
}
|
|
if (best_index != -1) {
|
|
gst_structure_set (structure, field_name, G_TYPE_BOOLEAN, best, NULL);
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_fixate_field_string:
|
|
* @structure: a #GstStructure
|
|
* @field_name: a field in @structure
|
|
* @target: the target value of the fixation
|
|
*
|
|
* Fixates a #GstStructure by changing the given @field_name field to the given
|
|
* @target string if that field is not fixed yet.
|
|
*
|
|
* Returns: TRUE if the structure could be fixated
|
|
*
|
|
* Since: 0.10.30
|
|
*/
|
|
gboolean
|
|
gst_structure_fixate_field_string (GstStructure * structure,
|
|
const gchar * field_name, const gchar * target)
|
|
{
|
|
const GValue *value;
|
|
|
|
g_return_val_if_fail (gst_structure_has_field (structure, field_name), FALSE);
|
|
g_return_val_if_fail (IS_MUTABLE (structure), FALSE);
|
|
|
|
value = gst_structure_get_value (structure, field_name);
|
|
|
|
if (G_VALUE_TYPE (value) == G_TYPE_STRING) {
|
|
/* already fixed */
|
|
return FALSE;
|
|
} else if (G_VALUE_TYPE (value) == GST_TYPE_LIST) {
|
|
const GValue *list_value;
|
|
int i, n;
|
|
const gchar *best = NULL;
|
|
int best_index = -1;
|
|
|
|
n = gst_value_list_get_size (value);
|
|
for (i = 0; i < n; i++) {
|
|
list_value = gst_value_list_get_value (value, i);
|
|
if (G_VALUE_TYPE (list_value) == G_TYPE_STRING) {
|
|
const gchar *x = g_value_get_string (list_value);
|
|
|
|
if (best_index == -1 || g_str_equal (x, target)) {
|
|
best_index = i;
|
|
best = x;
|
|
}
|
|
}
|
|
}
|
|
if (best_index != -1) {
|
|
gst_structure_set (structure, field_name, G_TYPE_STRING, best, NULL);
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_fixate_field_nearest_fraction:
|
|
* @structure: a #GstStructure
|
|
* @field_name: a field in @structure
|
|
* @target_numerator: The numerator of the target value of the fixation
|
|
* @target_denominator: The denominator of the target value of the fixation
|
|
*
|
|
* Fixates a #GstStructure by changing the given field to the nearest
|
|
* fraction to @target_numerator/@target_denominator that is a subset
|
|
* of the existing field.
|
|
*
|
|
* Returns: TRUE if the structure could be fixated
|
|
*/
|
|
gboolean
|
|
gst_structure_fixate_field_nearest_fraction (GstStructure * structure,
|
|
const char *field_name, const gint target_numerator,
|
|
const gint target_denominator)
|
|
{
|
|
const GValue *value;
|
|
|
|
g_return_val_if_fail (gst_structure_has_field (structure, field_name), FALSE);
|
|
g_return_val_if_fail (IS_MUTABLE (structure), FALSE);
|
|
|
|
value = gst_structure_get_value (structure, field_name);
|
|
|
|
if (G_VALUE_TYPE (value) == GST_TYPE_FRACTION) {
|
|
/* already fixed */
|
|
return FALSE;
|
|
} else if (G_VALUE_TYPE (value) == GST_TYPE_FRACTION_RANGE) {
|
|
const GValue *x, *new_value;
|
|
GValue target = { 0 };
|
|
g_value_init (&target, GST_TYPE_FRACTION);
|
|
gst_value_set_fraction (&target, target_numerator, target_denominator);
|
|
|
|
new_value = ⌖
|
|
x = gst_value_get_fraction_range_min (value);
|
|
if (gst_value_compare (&target, x) == GST_VALUE_LESS_THAN)
|
|
new_value = x;
|
|
x = gst_value_get_fraction_range_max (value);
|
|
if (gst_value_compare (&target, x) == GST_VALUE_GREATER_THAN)
|
|
new_value = x;
|
|
|
|
gst_structure_set_value (structure, field_name, new_value);
|
|
g_value_unset (&target);
|
|
return TRUE;
|
|
} else if (G_VALUE_TYPE (value) == GST_TYPE_LIST) {
|
|
const GValue *list_value;
|
|
int i, n;
|
|
const GValue *best = NULL;
|
|
gdouble target;
|
|
gdouble cur_diff;
|
|
gdouble best_diff = G_MAXDOUBLE;
|
|
|
|
target = (gdouble) target_numerator / (gdouble) target_denominator;
|
|
|
|
GST_DEBUG ("target %g, best %g", target, best_diff);
|
|
|
|
best = NULL;
|
|
|
|
n = gst_value_list_get_size (value);
|
|
for (i = 0; i < n; i++) {
|
|
list_value = gst_value_list_get_value (value, i);
|
|
if (G_VALUE_TYPE (list_value) == GST_TYPE_FRACTION) {
|
|
gint num, denom;
|
|
gdouble list_double;
|
|
|
|
num = gst_value_get_fraction_numerator (list_value);
|
|
denom = gst_value_get_fraction_denominator (list_value);
|
|
|
|
list_double = ((gdouble) num / (gdouble) denom);
|
|
cur_diff = target - list_double;
|
|
|
|
GST_DEBUG ("curr diff %g, list %g", cur_diff, list_double);
|
|
|
|
if (cur_diff < 0)
|
|
cur_diff = -cur_diff;
|
|
|
|
if (!best || cur_diff < best_diff) {
|
|
GST_DEBUG ("new best %g", list_double);
|
|
best = list_value;
|
|
best_diff = cur_diff;
|
|
}
|
|
}
|
|
}
|
|
if (best != NULL) {
|
|
gst_structure_set_value (structure, field_name, best);
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
default_fixate (GQuark field_id, const GValue * value, gpointer data)
|
|
{
|
|
GstStructure *s = data;
|
|
GValue v = { 0 };
|
|
|
|
if (gst_value_fixate (&v, value)) {
|
|
gst_structure_id_set_value (s, field_id, &v);
|
|
g_value_unset (&v);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_fixate_field:
|
|
* @structure: a #GstStructure
|
|
* @field_name: a field in @structure
|
|
*
|
|
* Fixates a #GstStructure by changing the given field with its fixated value.
|
|
*
|
|
* Returns: TRUE if the structure field could be fixated
|
|
*/
|
|
gboolean
|
|
gst_structure_fixate_field (GstStructure * structure, const char *field_name)
|
|
{
|
|
GstStructureField *field;
|
|
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (IS_MUTABLE (structure), FALSE);
|
|
|
|
if (!(field = gst_structure_get_field (structure, field_name)))
|
|
return FALSE;
|
|
|
|
return default_fixate (field->name, &field->value, structure);
|
|
}
|
|
|
|
/* our very own version of G_VALUE_LCOPY that allows NULL return locations
|
|
* (useful for message parsing functions where the return location is user
|
|
* supplied and the user may pass NULL if the value isn't of interest) */
|
|
#define GST_VALUE_LCOPY(value, var_args, flags, __error, fieldname) \
|
|
G_STMT_START { \
|
|
const GValue *_value = (value); \
|
|
guint _flags = (flags); \
|
|
GType _value_type = G_VALUE_TYPE (_value); \
|
|
GTypeValueTable *_vtable = g_type_value_table_peek (_value_type); \
|
|
gchar *_lcopy_format = _vtable->lcopy_format; \
|
|
GTypeCValue _cvalues[G_VALUE_COLLECT_FORMAT_MAX_LENGTH] = { { 0, }, }; \
|
|
guint _n_values = 0; \
|
|
\
|
|
while (*_lcopy_format != '\0') { \
|
|
g_assert (*_lcopy_format == G_VALUE_COLLECT_POINTER); \
|
|
_cvalues[_n_values++].v_pointer = va_arg ((var_args), gpointer); \
|
|
_lcopy_format++; \
|
|
} \
|
|
if (_n_values == 2 && !!_cvalues[0].v_pointer != !!_cvalues[1].v_pointer) { \
|
|
*(__error) = g_strdup_printf ("either all or none of the return " \
|
|
"locations for field '%s' need to be NULL", fieldname); \
|
|
} else if (_cvalues[0].v_pointer != NULL) { \
|
|
*(__error) = _vtable->lcopy_value (_value, _n_values, _cvalues, _flags); \
|
|
} \
|
|
} G_STMT_END
|
|
|
|
/**
|
|
* gst_structure_get_valist:
|
|
* @structure: a #GstStructure
|
|
* @first_fieldname: the name of the first field to read
|
|
* @args: variable arguments
|
|
*
|
|
* Parses the variable arguments and reads fields from @structure accordingly.
|
|
* valist-variant of gst_structure_get(). Look at the documentation of
|
|
* gst_structure_get() for more details.
|
|
*
|
|
* Returns: TRUE, or FALSE if there was a problem reading any of the fields
|
|
*
|
|
* Since: 0.10.24
|
|
*/
|
|
gboolean
|
|
gst_structure_get_valist (const GstStructure * structure,
|
|
const char *first_fieldname, va_list args)
|
|
{
|
|
const char *field_name;
|
|
GType expected_type = G_TYPE_INVALID;
|
|
|
|
g_return_val_if_fail (GST_IS_STRUCTURE (structure), FALSE);
|
|
g_return_val_if_fail (first_fieldname != NULL, FALSE);
|
|
|
|
field_name = first_fieldname;
|
|
while (field_name) {
|
|
const GValue *val = NULL;
|
|
gchar *err = NULL;
|
|
|
|
expected_type = va_arg (args, GType);
|
|
|
|
val = gst_structure_get_value (structure, field_name);
|
|
|
|
if (val == NULL)
|
|
goto no_such_field;
|
|
|
|
if (G_VALUE_TYPE (val) != expected_type)
|
|
goto wrong_type;
|
|
|
|
GST_VALUE_LCOPY (val, args, 0, &err, field_name);
|
|
if (err) {
|
|
g_warning ("%s: %s", G_STRFUNC, err);
|
|
g_free (err);
|
|
return FALSE;
|
|
}
|
|
|
|
field_name = va_arg (args, const gchar *);
|
|
}
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
no_such_field:
|
|
{
|
|
GST_WARNING ("Expected field '%s' in structure: %" GST_PTR_FORMAT,
|
|
field_name, structure);
|
|
return FALSE;
|
|
}
|
|
wrong_type:
|
|
{
|
|
GST_WARNING ("Expected field '%s' in structure to be of type '%s', but "
|
|
"field was of type '%s': %" GST_PTR_FORMAT, field_name,
|
|
GST_STR_NULL (g_type_name (expected_type)),
|
|
G_VALUE_TYPE_NAME (gst_structure_get_value (structure, field_name)),
|
|
structure);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_structure_id_get_valist:
|
|
* @structure: a #GstStructure
|
|
* @first_field_id: the quark of the first field to read
|
|
* @args: variable arguments
|
|
*
|
|
* Parses the variable arguments and reads fields from @structure accordingly.
|
|
* valist-variant of gst_structure_id_get(). Look at the documentation of
|
|
* gst_structure_id_get() for more details.
|
|
*
|
|
* Returns: TRUE, or FALSE if there was a problem reading any of the fields
|
|
*
|
|
* Since: 0.10.24
|
|
*/
|
|
gboolean
|
|
gst_structure_id_get_valist (const GstStructure * structure,
|
|
GQuark first_field_id, va_list args)
|
|
{
|
|
GQuark field_id;
|
|
GType expected_type = G_TYPE_INVALID;
|
|
|
|
g_return_val_if_fail (GST_IS_STRUCTURE (structure), FALSE);
|
|
g_return_val_if_fail (first_field_id != 0, FALSE);
|
|
|
|
field_id = first_field_id;
|
|
while (field_id) {
|
|
const GValue *val = NULL;
|
|
gchar *err = NULL;
|
|
|
|
expected_type = va_arg (args, GType);
|
|
|
|
val = gst_structure_id_get_value (structure, field_id);
|
|
|
|
if (val == NULL)
|
|
goto no_such_field;
|
|
|
|
if (G_VALUE_TYPE (val) != expected_type)
|
|
goto wrong_type;
|
|
|
|
GST_VALUE_LCOPY (val, args, 0, &err, g_quark_to_string (field_id));
|
|
if (err) {
|
|
g_warning ("%s: %s", G_STRFUNC, err);
|
|
g_free (err);
|
|
return FALSE;
|
|
}
|
|
|
|
field_id = va_arg (args, GQuark);
|
|
}
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
no_such_field:
|
|
{
|
|
GST_WARNING ("Expected field '%s' in structure: %" GST_PTR_FORMAT,
|
|
GST_STR_NULL (g_quark_to_string (field_id)), structure);
|
|
return FALSE;
|
|
}
|
|
wrong_type:
|
|
{
|
|
GST_WARNING ("Expected field '%s' in structure to be of type '%s', but "
|
|
"field was of type '%s': %" GST_PTR_FORMAT,
|
|
g_quark_to_string (field_id),
|
|
GST_STR_NULL (g_type_name (expected_type)),
|
|
G_VALUE_TYPE_NAME (gst_structure_id_get_value (structure, field_id)),
|
|
structure);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get:
|
|
* @structure: a #GstStructure
|
|
* @first_fieldname: the name of the first field to read
|
|
* @...: variable arguments
|
|
*
|
|
* Parses the variable arguments and reads fields from @structure accordingly.
|
|
* Variable arguments should be in the form field name, field type
|
|
* (as a GType), pointer(s) to a variable(s) to hold the return value(s).
|
|
* The last variable argument should be NULL.
|
|
*
|
|
* For refcounted (mini)objects you will acquire your own reference which
|
|
* you must release with a suitable _unref() when no longer needed. For
|
|
* strings and boxed types you will acquire a copy which you will need to
|
|
* release with either g_free() or the suitable function for the boxed type.
|
|
*
|
|
* Returns: FALSE if there was a problem reading any of the fields (e.g.
|
|
* because the field requested did not exist, or was of a type other
|
|
* than the type specified), otherwise TRUE.
|
|
*
|
|
* Since: 0.10.24
|
|
*/
|
|
gboolean
|
|
gst_structure_get (const GstStructure * structure, const char *first_fieldname,
|
|
...)
|
|
{
|
|
gboolean ret;
|
|
va_list args;
|
|
|
|
g_return_val_if_fail (GST_IS_STRUCTURE (structure), FALSE);
|
|
g_return_val_if_fail (first_fieldname != NULL, FALSE);
|
|
|
|
va_start (args, first_fieldname);
|
|
ret = gst_structure_get_valist (structure, first_fieldname, args);
|
|
va_end (args);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_id_get:
|
|
* @structure: a #GstStructure
|
|
* @first_field_id: the quark of the first field to read
|
|
* @...: variable arguments
|
|
*
|
|
* Parses the variable arguments and reads fields from @structure accordingly.
|
|
* Variable arguments should be in the form field id quark, field type
|
|
* (as a GType), pointer(s) to a variable(s) to hold the return value(s).
|
|
* The last variable argument should be NULL (technically it should be a
|
|
* 0 quark, but we require NULL so compilers that support it can check for
|
|
* the NULL terminator and warn if it's not there).
|
|
*
|
|
* This function is just like gst_structure_get() only that it is slightly
|
|
* more efficient since it saves the string-to-quark lookup in the global
|
|
* quark hashtable.
|
|
*
|
|
* For refcounted (mini)objects you will acquire your own reference which
|
|
* you must release with a suitable _unref() when no longer needed. For
|
|
* strings and boxed types you will acquire a copy which you will need to
|
|
* release with either g_free() or the suitable function for the boxed type.
|
|
*
|
|
* Returns: FALSE if there was a problem reading any of the fields (e.g.
|
|
* because the field requested did not exist, or was of a type other
|
|
* than the type specified), otherwise TRUE.
|
|
*
|
|
* Since: 0.10.24
|
|
*/
|
|
gboolean
|
|
gst_structure_id_get (const GstStructure * structure, GQuark first_field_id,
|
|
...)
|
|
{
|
|
gboolean ret;
|
|
va_list args;
|
|
|
|
g_return_val_if_fail (GST_IS_STRUCTURE (structure), FALSE);
|
|
g_return_val_if_fail (first_field_id != 0, FALSE);
|
|
|
|
va_start (args, first_field_id);
|
|
ret = gst_structure_id_get_valist (structure, first_field_id, args);
|
|
va_end (args);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_structure_is_equal_foreach (GQuark field_id, const GValue * val2,
|
|
gpointer data)
|
|
{
|
|
const GstStructure *struct1 = (const GstStructure *) data;
|
|
const GValue *val1 = gst_structure_id_get_value (struct1, field_id);
|
|
|
|
if (G_UNLIKELY (val1 == NULL))
|
|
return FALSE;
|
|
if (gst_value_compare (val1, val2) == GST_VALUE_EQUAL) {
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_is_equal:
|
|
* @structure1: a #GstStructure.
|
|
* @structure2: a #GstStructure.
|
|
*
|
|
* Tests if the two #GstStructure are equal.
|
|
*
|
|
* Returns: TRUE if the two structures have the same name and field.
|
|
*
|
|
* Since: 0.10.36
|
|
**/
|
|
gboolean
|
|
gst_structure_is_equal (const GstStructure * structure1,
|
|
const GstStructure * structure2)
|
|
{
|
|
g_return_val_if_fail (GST_IS_STRUCTURE (structure1), FALSE);
|
|
g_return_val_if_fail (GST_IS_STRUCTURE (structure2), FALSE);
|
|
|
|
if (G_UNLIKELY (structure1 == structure2))
|
|
return TRUE;
|
|
|
|
if (structure1->name != structure2->name) {
|
|
return FALSE;
|
|
}
|
|
if (GST_STRUCTURE_FIELDS (structure1)->len !=
|
|
GST_STRUCTURE_FIELDS (structure2)->len) {
|
|
return FALSE;
|
|
}
|
|
|
|
return gst_structure_foreach (structure1, gst_structure_is_equal_foreach,
|
|
(gpointer) structure2);
|
|
}
|
|
|
|
|
|
typedef struct
|
|
{
|
|
GstStructure *dest;
|
|
const GstStructure *intersect;
|
|
}
|
|
IntersectData;
|
|
|
|
static gboolean
|
|
gst_structure_intersect_field1 (GQuark id, const GValue * val1, gpointer data)
|
|
{
|
|
IntersectData *idata = (IntersectData *) data;
|
|
const GValue *val2 = gst_structure_id_get_value (idata->intersect, id);
|
|
|
|
if (G_UNLIKELY (val2 == NULL)) {
|
|
gst_structure_id_set_value (idata->dest, id, val1);
|
|
} else {
|
|
GValue dest_value = { 0 };
|
|
if (gst_value_intersect (&dest_value, val1, val2)) {
|
|
gst_structure_id_set_value (idata->dest, id, &dest_value);
|
|
g_value_unset (&dest_value);
|
|
} else {
|
|
return FALSE;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_structure_intersect_field2 (GQuark id, const GValue * val1, gpointer data)
|
|
{
|
|
IntersectData *idata = (IntersectData *) data;
|
|
const GValue *val2 = gst_structure_id_get_value (idata->intersect, id);
|
|
|
|
if (G_UNLIKELY (val2 == NULL)) {
|
|
gst_structure_id_set_value (idata->dest, id, val1);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_intersect:
|
|
* @struct1: a #GstStructure
|
|
* @struct2: a #GstStructure
|
|
*
|
|
* Interesects @struct1 and @struct2 and returns the intersection.
|
|
*
|
|
* Returns: Intersection of @struct1 and @struct2
|
|
*
|
|
* Since: 0.10.36
|
|
*/
|
|
GstStructure *
|
|
gst_structure_intersect (const GstStructure * struct1,
|
|
const GstStructure * struct2)
|
|
{
|
|
IntersectData data;
|
|
|
|
g_assert (struct1 != NULL);
|
|
g_assert (struct2 != NULL);
|
|
|
|
if (G_UNLIKELY (struct1->name != struct2->name))
|
|
return NULL;
|
|
|
|
/* copy fields from struct1 which we have not in struct2 to target
|
|
* intersect if we have the field in both */
|
|
data.dest = gst_structure_new_id_empty (struct1->name);
|
|
data.intersect = struct2;
|
|
if (G_UNLIKELY (!gst_structure_foreach ((GstStructure *) struct1,
|
|
gst_structure_intersect_field1, &data)))
|
|
goto error;
|
|
|
|
/* copy fields from struct2 which we have not in struct1 to target */
|
|
data.intersect = struct1;
|
|
if (G_UNLIKELY (!gst_structure_foreach ((GstStructure *) struct2,
|
|
gst_structure_intersect_field2, &data)))
|
|
goto error;
|
|
|
|
return data.dest;
|
|
|
|
error:
|
|
gst_structure_free (data.dest);
|
|
return NULL;
|
|
}
|
|
|
|
static gboolean
|
|
gst_caps_structure_can_intersect_field (GQuark id, const GValue * val1,
|
|
gpointer data)
|
|
{
|
|
GstStructure *other = (GstStructure *) data;
|
|
const GValue *val2 = gst_structure_id_get_value (other, id);
|
|
|
|
if (G_LIKELY (val2)) {
|
|
if (!gst_value_can_intersect (val1, val2)) {
|
|
return FALSE;
|
|
} else {
|
|
gint eq = gst_value_compare (val1, val2);
|
|
|
|
if (eq == GST_VALUE_UNORDERED) {
|
|
/* we need to try interseting */
|
|
if (!gst_value_intersect (NULL, val1, val2)) {
|
|
return FALSE;
|
|
}
|
|
} else if (eq != GST_VALUE_EQUAL) {
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_can_intersect:
|
|
* @struct1: a #GstStructure
|
|
* @struct2: a #GstStructure
|
|
*
|
|
* Tries intersecting @struct1 and @struct2 and reports whether the result
|
|
* would not be empty.
|
|
*
|
|
* Returns: %TRUE if intersection would not be empty
|
|
*
|
|
* Since: 0.10.36
|
|
*/
|
|
gboolean
|
|
gst_structure_can_intersect (const GstStructure * struct1,
|
|
const GstStructure * struct2)
|
|
{
|
|
g_return_val_if_fail (GST_IS_STRUCTURE (struct1), FALSE);
|
|
g_return_val_if_fail (GST_IS_STRUCTURE (struct2), FALSE);
|
|
|
|
if (G_UNLIKELY (struct1->name != struct2->name))
|
|
return FALSE;
|
|
|
|
/* tries to intersect if we have the field in both */
|
|
return gst_structure_foreach ((GstStructure *) struct1,
|
|
gst_caps_structure_can_intersect_field, (gpointer) struct2);
|
|
}
|
|
|
|
static gboolean
|
|
gst_caps_structure_is_subset_field (GQuark field_id, const GValue * value,
|
|
gpointer user_data)
|
|
{
|
|
GstStructure *superset = user_data;
|
|
const GValue *other;
|
|
int comparison;
|
|
|
|
if (!(other = gst_structure_id_get_value (superset, field_id)))
|
|
/* field is missing in the superset => is subset */
|
|
return TRUE;
|
|
|
|
comparison = gst_value_compare (other, value);
|
|
|
|
/* equal values are subset */
|
|
if (comparison == GST_VALUE_EQUAL)
|
|
return TRUE;
|
|
|
|
/* ordered, but unequal, values are not */
|
|
if (comparison != GST_VALUE_UNORDERED)
|
|
return FALSE;
|
|
|
|
/*
|
|
* 1 - [1,2] = empty
|
|
* -> !subset
|
|
*
|
|
* [1,2] - 1 = 2
|
|
* -> 1 - [1,2] = empty
|
|
* -> subset
|
|
*
|
|
* [1,3] - [1,2] = 3
|
|
* -> [1,2] - [1,3] = empty
|
|
* -> subset
|
|
*
|
|
* {1,2} - {1,3} = 2
|
|
* -> {1,3} - {1,2} = 3
|
|
* -> !subset
|
|
*
|
|
* First caps subtraction needs to return a non-empty set, second
|
|
* subtractions needs to give en empty set.
|
|
* Both substractions are switched below, as it's faster that way.
|
|
*/
|
|
if (!gst_value_subtract (NULL, value, other)) {
|
|
if (gst_value_subtract (NULL, other, value)) {
|
|
return TRUE;
|
|
}
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_is_subset:
|
|
* @subset: a #GstStructure
|
|
* @superset: a potentially greater #GstStructure
|
|
*
|
|
* Checks if @subset is a subset of @superset, i.e. has the same
|
|
* structure name and for all fields that are existing in @superset,
|
|
* @subset has a value that is a subset of the value in @superset.
|
|
*
|
|
* Returns: %TRUE if @subset is a subset of @superset
|
|
*
|
|
* Since: 0.10.36
|
|
*/
|
|
gboolean
|
|
gst_structure_is_subset (const GstStructure * subset,
|
|
const GstStructure * superset)
|
|
{
|
|
if ((superset->name != subset->name) ||
|
|
(gst_structure_n_fields (superset) > gst_structure_n_fields (subset)))
|
|
return FALSE;
|
|
|
|
return gst_structure_foreach ((GstStructure *) subset,
|
|
gst_caps_structure_is_subset_field, (gpointer) superset);
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_structure_fixate:
|
|
* @structure: a #GstStructure
|
|
*
|
|
* Fixate all values in @structure using gst_value_fixate().
|
|
* @structure will be modified in-place and should be writable.
|
|
*/
|
|
void
|
|
gst_structure_fixate (GstStructure * structure)
|
|
{
|
|
g_return_if_fail (GST_IS_STRUCTURE (structure));
|
|
|
|
gst_structure_foreach (structure, default_fixate, structure);
|
|
}
|