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3476 lines
99 KiB
C
3476 lines
99 KiB
C
/* GStreamer
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* Copyright (C) 2003 David A. Schleef <ds@schleef.org>
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*
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* gststructure.c: lists of { GQuark, GValue } tuples
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:gststructure
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* @title: GstStructure
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* @short_description: Generic structure containing fields of names and values
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* @see_also: #GstCaps, #GstMessage, #GstEvent, #GstQuery
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*
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* A #GstStructure is a collection of key/value pairs. The keys are expressed as
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* GQuarks and the values can be of any GType.
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*
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* In addition to the key/value pairs, a #GstStructure also has a name. The name
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* starts with a letter and can be filled by letters, numbers and any of
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* "/-_.:".
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*
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* #GstStructure is used by various GStreamer subsystems to store information in
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* a flexible and extensible way. A #GstStructure does not have a refcount
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* because it usually is part of a higher level object such as #GstCaps,
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* #GstMessage, #GstEvent, #GstQuery. It provides a means to enforce mutability
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* using the refcount of the parent with the gst_structure_set_parent_refcount()
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* method.
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*
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* A #GstStructure can be created with gst_structure_new_empty() or
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* gst_structure_new(), which both take a name and an optional set of key/value
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* pairs along with the types of the values.
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*
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* Field values can be changed with gst_structure_set_value() or
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* gst_structure_set().
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*
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* Field values can be retrieved with gst_structure_get_value() or the more
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* convenient gst_structure_get_*() functions.
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*
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* Fields can be removed with gst_structure_remove_field() or
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* gst_structure_remove_fields().
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*
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* Strings in structures must be ASCII or UTF-8 encoded. Other encodings are not
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* allowed. Strings may be %NULL however.
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*
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* ## The serialization format
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*
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* GstStructure serialization format serialize the GstStructure name,
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* keys/GType/values in a comma separated list with the structure name as first
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* field without value followed by separated key/value pairs in the form
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* `key=value`, for example:
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*
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* ```
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* a-structure, key=value
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* ````
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*
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* The values type will be inferred if not explicitly specified with the
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* `(GTypeName)value` syntax, for example the following struct will have one
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* field called 'is-string' which has the string 'true' as a value:
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*
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* ```
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* a-struct, field-is-string=(string)true, field-is-boolean=true
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* ```
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*
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* *Note*: without specifying `(string), `field-is-string` type would have been
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* inferred as boolean.
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*
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* *Note*: we specified `(string)` as a type even if `gchararray` is the actual
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* GType name as for convenience some well known types have been aliased or
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* abbreviated.
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*
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* To avoid specifying the type, you can give some hints to the "type system".
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* For example to specify a value as a double, you should add a decimal (ie. `1`
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* is an `int` while `1.0` is a `double`).
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*
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* *Note*: when a structure is serialized with #gst_structure_to_string, all
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* values are explicitly typed.
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*
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* Some types have special delimiters:
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*
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* - [GstValueArray](GST_TYPE_ARRAY) are inside curly brackets (`{` and `}`).
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* For example `a-structure, array={1, 2, 3}`
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* - Ranges are inside brackets (`[` and `]`). For example `a-structure,
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* range=[1, 6, 2]` 1 being the min value, 6 the maximum and 2 the step. To
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* specify a #GST_TYPE_INT64_RANGE you need to explicitly specify it like:
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* `a-structure, a-int64-range=(gint64) [1, 5]`
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* - [GstValueList](GST_TYPE_LIST) are inside "less and greater than" (`<` and
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* `>`). For example `a-structure, list=<1, 2, 3>
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*
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* Structures are delimited either by a null character `\0` or a semicolon `;`
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* the latter allowing to store multiple structures in the same string (see
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* #GstCaps).
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*
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* Quotes are used as "default" delimiters and can be used around any types that
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* don't use other delimiters (for example `a-struct, i=(int)"1"`). They are use
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* to allow adding spaces or special characters (such as delimiters,
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* semicolumns, etc..) inside strings and you can use backslashes `\` to escape
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* characters inside them, for example:
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*
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* ```
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* a-struct, special="\"{[(;)]}\" can be used inside quotes"
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* ```
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*
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* They also allow for nested structure, such as:
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*
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* ```
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* a-struct, nested=(GstStructure)"nested-struct, nested=true"
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* ```
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*
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* Since 1.20, nested structures and caps can be specified using brackets (`[`
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* and `]`), for example:
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*
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* ```
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* a-struct, nested=[nested-struct, nested=true]
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* ```
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*
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* > *note*: gst_structure_to_string() won't use that syntax for backward
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* > compatibility reason, gst_structure_serialize() has been added for
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* > that purpose.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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/* FIXME 2.0: suppress warnings for deprecated API such as GValueArray
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* with newer GLib versions (>= 2.31.0) */
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#define GLIB_DISABLE_DEPRECATION_WARNINGS
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#include <string.h>
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#include "gst_private.h"
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#include "gstquark.h"
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#include <gst/gst.h>
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#include <gobject/gvaluecollector.h>
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GST_DEBUG_CATEGORY_STATIC (gst_structure_debug);
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#define GST_CAT_DEFAULT gst_structure_debug
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typedef struct _GstStructureField GstStructureField;
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struct _GstStructureField
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{
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GQuark name;
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GValue value;
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};
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typedef struct
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{
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GstStructure s;
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/* owned by parent structure, NULL if no parent */
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gint *parent_refcount;
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guint fields_len; /* Number of valid items in fields */
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guint fields_alloc; /* Allocated items in fields */
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/* Fields are allocated if GST_STRUCTURE_IS_USING_DYNAMIC_ARRAY(),
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* else it's a pointer to the arr field. */
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GstStructureField *fields;
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GstStructureField arr[1];
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} GstStructureImpl;
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#define GST_STRUCTURE_REFCOUNT(s) (((GstStructureImpl*)(s))->parent_refcount)
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#define GST_STRUCTURE_LEN(s) (((GstStructureImpl*)(s))->fields_len)
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#define GST_STRUCTURE_IS_USING_DYNAMIC_ARRAY(s) \
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(((GstStructureImpl*)(s))->fields != &((GstStructureImpl*)(s))->arr[0])
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#define GST_STRUCTURE_FIELD(structure, index) \
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(&((GstStructureImpl*)(structure))->fields[(index)])
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#define IS_MUTABLE(structure) \
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(!GST_STRUCTURE_REFCOUNT(structure) || \
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g_atomic_int_get (GST_STRUCTURE_REFCOUNT(structure)) == 1)
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#define IS_TAGLIST(structure) \
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(structure->name == GST_QUARK (TAGLIST))
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/* Replacement for g_array_append_val */
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static void
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_structure_append_val (GstStructure * s, GstStructureField * val)
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{
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GstStructureImpl *impl = (GstStructureImpl *) s;
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/* resize if needed */
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if (G_UNLIKELY (impl->fields_len == impl->fields_alloc)) {
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guint want_alloc;
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if (G_UNLIKELY (impl->fields_alloc > (G_MAXUINT / 2)))
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g_error ("Growing structure would result in overflow");
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want_alloc =
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MAX (GST_ROUND_UP_8 (impl->fields_len + 1), impl->fields_alloc * 2);
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if (GST_STRUCTURE_IS_USING_DYNAMIC_ARRAY (s)) {
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impl->fields = g_renew (GstStructureField, impl->fields, want_alloc);
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} else {
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impl->fields = g_new0 (GstStructureField, want_alloc);
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memcpy (impl->fields, &impl->arr[0],
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impl->fields_len * sizeof (GstStructureField));
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GST_CAT_LOG (GST_CAT_PERFORMANCE, "Exceeding pre-allocated array");
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}
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impl->fields_alloc = want_alloc;
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}
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/* Finally set value */
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impl->fields[impl->fields_len++] = *val;
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}
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/* Replacement for g_array_remove_index */
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static inline void
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_structure_remove_index (GstStructure * s, guint idx)
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{
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GstStructureImpl *impl = (GstStructureImpl *) s;
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/* We never "reduce" the memory footprint. */
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if (idx >= impl->fields_len)
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return;
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/* Shift everything if it's not the last item */
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if (idx != impl->fields_len)
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memmove (&impl->fields[idx],
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&impl->fields[idx + 1],
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(impl->fields_len - idx - 1) * sizeof (GstStructureField));
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impl->fields_len--;
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}
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static void gst_structure_set_field (GstStructure * structure,
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GstStructureField * field);
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static GstStructureField *gst_structure_get_field (const GstStructure *
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structure, const gchar * fieldname);
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static GstStructureField *gst_structure_id_get_field (const GstStructure *
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structure, GQuark field);
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static void gst_structure_transform_to_string (const GValue * src_value,
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GValue * dest_value);
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static GstStructure *gst_structure_copy_conditional (const GstStructure *
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structure);
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GType _gst_structure_type = 0;
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G_DEFINE_BOXED_TYPE (GstStructure, gst_structure,
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gst_structure_copy_conditional, gst_structure_free);
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void
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_priv_gst_structure_initialize (void)
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{
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_gst_structure_type = gst_structure_get_type ();
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g_value_register_transform_func (_gst_structure_type, G_TYPE_STRING,
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gst_structure_transform_to_string);
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GST_DEBUG_CATEGORY_INIT (gst_structure_debug, "structure", 0,
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"GstStructure debug");
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}
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static GstStructure *
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gst_structure_new_id_empty_with_size (GQuark quark, guint prealloc)
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{
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guint n_alloc;
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GstStructureImpl *structure;
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if (prealloc == 0)
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prealloc = 1;
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n_alloc = GST_ROUND_UP_8 (prealloc);
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structure =
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g_malloc0 (sizeof (GstStructureImpl) + (n_alloc -
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1) * sizeof (GstStructureField));
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((GstStructure *) structure)->type = _gst_structure_type;
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((GstStructure *) structure)->name = quark;
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GST_STRUCTURE_REFCOUNT (structure) = NULL;
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structure->fields_len = 0;
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structure->fields_alloc = n_alloc;
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structure->fields = &structure->arr[0];
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GST_TRACE ("created structure %p", structure);
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return GST_STRUCTURE_CAST (structure);
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}
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/**
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* gst_structure_new_id_empty:
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* @quark: name of new structure
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*
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* Creates a new, empty #GstStructure with the given name as a GQuark.
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*
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* Free-function: gst_structure_free
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*
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* Returns: (transfer full): a new, empty #GstStructure
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*/
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GstStructure *
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gst_structure_new_id_empty (GQuark quark)
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{
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g_return_val_if_fail (quark != 0, NULL);
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return gst_structure_new_id_empty_with_size (quark, 0);
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}
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static gboolean
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gst_structure_validate_name (const gchar * name)
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{
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const gchar *s;
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g_return_val_if_fail (name != NULL, FALSE);
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if (G_UNLIKELY (!g_ascii_isalpha (*name))) {
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GST_WARNING ("Invalid character '%c' at offset 0 in structure name: %s",
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*name, name);
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return FALSE;
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}
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/* FIXME: test name string more */
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s = &name[1];
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while (*s && (g_ascii_isalnum (*s) || strchr ("/-_.:+", *s) != NULL))
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s++;
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if (G_UNLIKELY (*s != '\0')) {
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GST_WARNING ("Invalid character '%c' at offset %" G_GUINTPTR_FORMAT " in"
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" structure name: %s", *s, ((guintptr) s - (guintptr) name), name);
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return FALSE;
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}
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if (strncmp (name, "video/x-raw-", 12) == 0) {
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g_warning ("0.10-style raw video caps are being created. Should be "
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"video/x-raw,format=(string).. now.");
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} else if (strncmp (name, "audio/x-raw-", 12) == 0) {
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g_warning ("0.10-style raw audio caps are being created. Should be "
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"audio/x-raw,format=(string).. now.");
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}
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return TRUE;
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}
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/**
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* gst_structure_new_empty:
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* @name: name of new structure
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*
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* Creates a new, empty #GstStructure with the given @name.
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*
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* See gst_structure_set_name() for constraints on the @name parameter.
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*
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* Free-function: gst_structure_free
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*
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* Returns: (transfer full): a new, empty #GstStructure
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*/
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GstStructure *
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gst_structure_new_empty (const gchar * name)
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{
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g_return_val_if_fail (gst_structure_validate_name (name), NULL);
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return gst_structure_new_id_empty_with_size (g_quark_from_string (name), 0);
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}
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/**
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* gst_structure_new:
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* @name: name of new structure
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* @firstfield: name of first field to set
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* @...: additional arguments
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*
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* Creates a new #GstStructure with the given name. Parses the
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* list of variable arguments and sets fields to the values listed.
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* Variable arguments should be passed as field name, field type,
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* and value. Last variable argument should be %NULL.
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*
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* Free-function: gst_structure_free
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*
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* Returns: (transfer full): a new #GstStructure
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*/
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GstStructure *
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gst_structure_new (const gchar * name, const gchar * firstfield, ...)
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{
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GstStructure *structure;
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va_list varargs;
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va_start (varargs, firstfield);
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structure = gst_structure_new_valist (name, firstfield, varargs);
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va_end (varargs);
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return structure;
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}
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/**
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* gst_structure_new_valist:
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* @name: name of new structure
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* @firstfield: name of first field to set
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* @varargs: variable argument list
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*
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* Creates a new #GstStructure with the given @name. Structure fields
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* are set according to the varargs in a manner similar to
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* gst_structure_new().
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*
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* See gst_structure_set_name() for constraints on the @name parameter.
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*
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* Free-function: gst_structure_free
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*
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* Returns: (transfer full): a new #GstStructure
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*/
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GstStructure *
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gst_structure_new_valist (const gchar * name,
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const gchar * firstfield, va_list varargs)
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{
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GstStructure *structure;
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va_list copy;
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guint len = 0;
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const gchar *field_copy = firstfield;
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GType type_copy;
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g_return_val_if_fail (gst_structure_validate_name (name), NULL);
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/* Calculate size of varargs */
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va_copy (copy, varargs);
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while (field_copy) {
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type_copy = va_arg (copy, GType);
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G_VALUE_COLLECT_SKIP (type_copy, copy);
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field_copy = va_arg (copy, gchar *);
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len++;
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}
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va_end (copy);
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structure =
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gst_structure_new_id_empty_with_size (g_quark_from_string (name), len);
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if (structure)
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gst_structure_set_valist (structure, firstfield, varargs);
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return structure;
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}
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/**
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* gst_structure_set_parent_refcount:
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* @structure: a #GstStructure
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* @refcount: (in): a pointer to the parent's refcount
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*
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* Sets the parent_refcount field of #GstStructure. This field is used to
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* determine whether a structure is mutable or not. This function should only be
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* called by code implementing parent objects of #GstStructure, as described in
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* the MT Refcounting section of the design documents.
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*
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* Returns: %TRUE if the parent refcount could be set.
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*/
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gboolean
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gst_structure_set_parent_refcount (GstStructure * structure, gint * refcount)
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{
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g_return_val_if_fail (structure != NULL, FALSE);
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/* if we have a parent_refcount already, we can only clear
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* if with a NULL refcount */
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if (GST_STRUCTURE_REFCOUNT (structure)) {
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if (refcount != NULL) {
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g_return_val_if_fail (refcount == NULL, FALSE);
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return FALSE;
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}
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} else {
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if (refcount == NULL) {
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g_return_val_if_fail (refcount != NULL, FALSE);
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return FALSE;
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}
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}
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GST_STRUCTURE_REFCOUNT (structure) = refcount;
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return TRUE;
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}
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/**
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* gst_structure_copy:
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* @structure: a #GstStructure to duplicate
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*
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* Duplicates a #GstStructure and all its fields and values.
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*
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* Free-function: gst_structure_free
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*
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* Returns: (transfer full): a new #GstStructure.
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*/
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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_LEN (structure);
|
|
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);
|
|
_structure_append_val (new_structure, &new_field);
|
|
}
|
|
GST_CAT_TRACE (GST_CAT_PERFORMANCE, "doing copy %p -> %p",
|
|
structure, new_structure);
|
|
|
|
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_LEN (structure);
|
|
for (i = 0; i < len; i++) {
|
|
field = GST_STRUCTURE_FIELD (structure, i);
|
|
|
|
if (G_IS_VALUE (&field->value)) {
|
|
g_value_unset (&field->value);
|
|
}
|
|
}
|
|
if (GST_STRUCTURE_IS_USING_DYNAMIC_ARRAY (structure))
|
|
g_free (((GstStructureImpl *) structure)->fields);
|
|
|
|
#ifdef USE_POISONING
|
|
memset (structure, 0xff, sizeof (GstStructure));
|
|
#endif
|
|
GST_TRACE ("free structure %p", structure);
|
|
|
|
g_free (structure);
|
|
}
|
|
|
|
/**
|
|
* gst_clear_structure: (skip)
|
|
* @structure_ptr: a pointer to a #GstStructure reference
|
|
*
|
|
* Clears a reference to a #GstStructure.
|
|
*
|
|
* @structure_ptr must not be %NULL.
|
|
*
|
|
* If the reference is %NULL then this function does nothing.
|
|
* Otherwise, the structure is free'd using gst_structure_free() and the
|
|
* pointer is set to %NULL.
|
|
*
|
|
* A macro is also included that allows this function to be used without
|
|
* pointer casts.
|
|
*
|
|
* Since: 1.16
|
|
**/
|
|
#undef gst_clear_structure
|
|
void
|
|
gst_clear_structure (GstStructure ** structure_ptr)
|
|
{
|
|
g_clear_pointer (structure_ptr, gst_structure_free);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_take:
|
|
* @oldstr_ptr: (inout) (transfer full) (nullable): pointer to a place of
|
|
* a #GstStructure to take
|
|
* @newstr: (transfer full) (allow-none): a new #GstStructure
|
|
*
|
|
* Atomically modifies a pointer to point to a new structure.
|
|
* The #GstStructure @oldstr_ptr is pointing to is freed and
|
|
* @newstr is taken ownership over.
|
|
*
|
|
* Either @newstr and the value pointed to by @oldstr_ptr may be %NULL.
|
|
*
|
|
* It is a programming error if both @newstr and the value pointed to by
|
|
* @oldstr_ptr refer to the same, non-%NULL structure.
|
|
*
|
|
* Returns: %TRUE if @newstr was different from @oldstr_ptr
|
|
*
|
|
* Since: 1.18
|
|
*/
|
|
gboolean
|
|
gst_structure_take (GstStructure ** oldstr_ptr, GstStructure * newstr)
|
|
{
|
|
GstStructure *oldstr;
|
|
|
|
g_return_val_if_fail (oldstr_ptr != NULL, FALSE);
|
|
|
|
do {
|
|
oldstr = g_atomic_pointer_get ((gpointer *) oldstr_ptr);
|
|
if (G_UNLIKELY (oldstr == newstr)) {
|
|
g_return_val_if_fail (newstr == NULL, FALSE);
|
|
return FALSE;
|
|
}
|
|
} while (G_UNLIKELY (!g_atomic_pointer_compare_and_exchange ((gpointer *)
|
|
oldstr_ptr, (gpointer) oldstr, newstr)));
|
|
|
|
if (oldstr)
|
|
gst_structure_free (oldstr);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
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.
|
|
*/
|
|
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);
|
|
|
|
G_VALUE_COLLECT_INIT (&field.value, type, varargs, 0, &err);
|
|
if (G_UNLIKELY (err)) {
|
|
g_critical ("%s", err);
|
|
g_free (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. Fields that
|
|
* weren't already part of the structure are added as needed.
|
|
* 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);
|
|
|
|
G_VALUE_COLLECT_INIT (&field.value, type, varargs, 0, &err);
|
|
if (G_UNLIKELY (err)) {
|
|
g_critical ("%s", err);
|
|
g_free (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.
|
|
*/
|
|
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().
|
|
*/
|
|
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
|
|
*/
|
|
GstStructure *
|
|
gst_structure_new_id (GQuark name_quark, GQuark field_quark, ...)
|
|
{
|
|
GstStructure *s;
|
|
va_list varargs;
|
|
va_list copy;
|
|
guint len = 0;
|
|
GQuark quark_copy = field_quark;
|
|
GType type_copy;
|
|
|
|
g_return_val_if_fail (name_quark != 0, NULL);
|
|
g_return_val_if_fail (field_quark != 0, NULL);
|
|
|
|
va_start (varargs, field_quark);
|
|
|
|
/* Calculate size of varargs */
|
|
va_copy (copy, varargs);
|
|
while (quark_copy) {
|
|
type_copy = va_arg (copy, GType);
|
|
G_VALUE_COLLECT_SKIP (type_copy, copy);
|
|
quark_copy = va_arg (copy, GQuark);
|
|
len++;
|
|
}
|
|
va_end (copy);
|
|
|
|
s = gst_structure_new_id_empty_with_size (name_quark, len);
|
|
|
|
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;
|
|
GType field_value_type;
|
|
guint i, len;
|
|
|
|
len = GST_STRUCTURE_LEN (structure);
|
|
|
|
field_value_type = G_VALUE_TYPE (&field->value);
|
|
if (field_value_type == G_TYPE_STRING) {
|
|
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 (field_value_type == G_TYPE_DATE)) {
|
|
const GDate *d;
|
|
|
|
d = g_value_get_boxed (&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;
|
|
}
|
|
}
|
|
|
|
_structure_append_val (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_LEN (structure);
|
|
|
|
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: (nullable): 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: (nullable): 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_LEN (structure);
|
|
|
|
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);
|
|
}
|
|
_structure_remove_index (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_LEN (structure) - 1; i >= 0; i--) {
|
|
field = GST_STRUCTURE_FIELD (structure, i);
|
|
|
|
if (G_IS_VALUE (&field->value)) {
|
|
g_value_unset (&field->value);
|
|
}
|
|
_structure_remove_index (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_LEN (structure);
|
|
}
|
|
|
|
/**
|
|
* 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_LEN (structure), 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()
|
|
* and gst_structure_filter_and_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_LEN (structure);
|
|
|
|
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_LEN (structure);
|
|
|
|
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_filter_and_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 the fields.
|
|
* In contrast to gst_structure_map_in_place(), the field is removed from
|
|
* the structure if %FALSE is returned from the function.
|
|
* The structure must be mutable.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
void
|
|
gst_structure_filter_and_map_in_place (GstStructure * structure,
|
|
GstStructureFilterMapFunc func, gpointer user_data)
|
|
{
|
|
guint i, len;
|
|
GstStructureField *field;
|
|
gboolean ret;
|
|
|
|
g_return_if_fail (structure != NULL);
|
|
g_return_if_fail (IS_MUTABLE (structure));
|
|
g_return_if_fail (func != NULL);
|
|
len = GST_STRUCTURE_LEN (structure);
|
|
|
|
for (i = 0; i < len;) {
|
|
field = GST_STRUCTURE_FIELD (structure, i);
|
|
|
|
ret = func (field->name, &field->value, user_data);
|
|
|
|
if (!ret) {
|
|
if (G_IS_VALUE (&field->value)) {
|
|
g_value_unset (&field->value);
|
|
}
|
|
_structure_remove_index (structure, i);
|
|
len = GST_STRUCTURE_LEN (structure);
|
|
} else {
|
|
i++;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
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
|
|
*/
|
|
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 || G_VALUE_TYPE (&field->value) != G_TYPE_BOOLEAN)
|
|
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 || G_VALUE_TYPE (&field->value) != G_TYPE_INT)
|
|
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.
|
|
*/
|
|
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 || G_VALUE_TYPE (&field->value) != G_TYPE_UINT)
|
|
return FALSE;
|
|
|
|
*value = gst_g_value_get_uint_unchecked (&field->value);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_int64:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
* @value: (out): a pointer to a #gint64 to set
|
|
*
|
|
* Sets the #gint64 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 #gint64, this function
|
|
* returns %FALSE.
|
|
*
|
|
* Since: 1.4
|
|
*/
|
|
gboolean
|
|
gst_structure_get_int64 (const GstStructure * structure,
|
|
const gchar * fieldname, gint64 * 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 || G_VALUE_TYPE (&field->value) != G_TYPE_INT64)
|
|
return FALSE;
|
|
|
|
*value = gst_g_value_get_int64_unchecked (&field->value);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_uint64:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
* @value: (out): a pointer to a #guint64 to set
|
|
*
|
|
* Sets the #guint64 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 #guint64, this function
|
|
* returns %FALSE.
|
|
*
|
|
* Since: 1.4
|
|
*/
|
|
gboolean
|
|
gst_structure_get_uint64 (const GstStructure * structure,
|
|
const gchar * fieldname, guint64 * 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 || G_VALUE_TYPE (&field->value) != G_TYPE_UINT64)
|
|
return FALSE;
|
|
|
|
*value = gst_g_value_get_uint64_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 || G_VALUE_TYPE (&field->value) != G_TYPE_DATE)
|
|
return FALSE;
|
|
|
|
/* FIXME: 2.0 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.
|
|
*/
|
|
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 2.0: 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)
|
|
{
|
|
return gst_structure_get_uint64 (structure, fieldname, value);
|
|
}
|
|
|
|
/**
|
|
* 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 || G_VALUE_TYPE (&field->value) != G_TYPE_DOUBLE)
|
|
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: (nullable): 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 || G_VALUE_TYPE (&field->value) != G_TYPE_STRING)
|
|
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 || G_VALUE_TYPE (&field->value) != GST_TYPE_FRACTION)
|
|
return FALSE;
|
|
|
|
*value_numerator = gst_value_get_fraction_numerator (&field->value);
|
|
*value_denominator = gst_value_get_fraction_denominator (&field->value);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_flagset:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
* @value_flags: (out) (allow-none): a pointer to a guint for the flags field
|
|
* @value_mask: (out) (allow-none): a pointer to a guint for the mask field
|
|
*
|
|
* Read the GstFlagSet flags and mask out of the structure into the
|
|
* provided pointers.
|
|
*
|
|
* Returns: %TRUE if the values could be set correctly. If there was no field
|
|
* with @fieldname or the existing field did not contain a GstFlagSet, this
|
|
* function returns %FALSE.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
gboolean
|
|
gst_structure_get_flagset (const GstStructure * structure,
|
|
const gchar * fieldname, guint * value_flags, guint * value_mask)
|
|
{
|
|
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 || !GST_VALUE_HOLDS_FLAG_SET (&field->value))
|
|
return FALSE;
|
|
|
|
if (value_flags)
|
|
*value_flags = gst_value_get_flagset_flags (&field->value);
|
|
if (value_mask)
|
|
*value_mask = gst_value_get_flagset_mask (&field->value);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GType
|
|
gst_structure_value_get_generic_type (const GValue * val)
|
|
{
|
|
if (G_VALUE_TYPE (val) == GST_TYPE_LIST
|
|
|| G_VALUE_TYPE (val) == GST_TYPE_ARRAY) {
|
|
GArray *array = g_value_peek_pointer (val);
|
|
|
|
/* Note, we can do this because the internal
|
|
* GstValueList/GstValueArray implementation is API/ABI compatible
|
|
* with GArray */
|
|
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, GstSerializeFlags flags)
|
|
{
|
|
GstStructureField *field;
|
|
guint i, len;
|
|
gboolean nested_structs_brackets =
|
|
!(flags & GST_SERIALIZE_FLAG_BACKWARD_COMPAT);
|
|
|
|
g_return_val_if_fail (s != NULL, FALSE);
|
|
|
|
len = GST_STRUCTURE_LEN (structure);
|
|
for (i = 0; i < len; i++) {
|
|
gchar *t = NULL;
|
|
GType type;
|
|
|
|
field = GST_STRUCTURE_FIELD (structure, i);
|
|
|
|
if (G_VALUE_TYPE (&field->value) == GST_TYPE_ARRAY) {
|
|
t = _priv_gst_value_serialize_any_list (&field->value, "< ", " >", FALSE);
|
|
} else if (G_VALUE_TYPE (&field->value) == GST_TYPE_LIST) {
|
|
t = _priv_gst_value_serialize_any_list (&field->value, "{ ", " }", FALSE);
|
|
} else if (!nested_structs_brackets
|
|
|| (G_VALUE_TYPE (&field->value) != GST_TYPE_STRUCTURE
|
|
&& G_VALUE_TYPE (&field->value) != GST_TYPE_CAPS)) {
|
|
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, _priv_gst_value_gtype_to_abbr (type));
|
|
g_string_append_c (s, ')');
|
|
if (nested_structs_brackets
|
|
&& G_VALUE_TYPE (&field->value) == GST_TYPE_STRUCTURE) {
|
|
const GstStructure *substruct = gst_value_get_structure (&field->value);
|
|
|
|
g_string_append_c (s, '[');
|
|
g_string_append (s, g_quark_to_string (substruct->name));
|
|
priv_gst_structure_append_to_gstring (substruct, s, flags);
|
|
g_string_append_c (s, ']');
|
|
} else if (nested_structs_brackets
|
|
&& G_VALUE_TYPE (&field->value) == GST_TYPE_CAPS) {
|
|
const GstCaps *subcaps = gst_value_get_caps (&field->value);
|
|
gchar *capsstr = gst_caps_serialize (subcaps, flags);
|
|
|
|
g_string_append_printf (s, "[%s]", capsstr);
|
|
g_free (capsstr);
|
|
} else if (t) {
|
|
g_string_append (s, t);
|
|
g_free (t);
|
|
} else if (G_TYPE_CHECK_VALUE_TYPE (&field->value, G_TYPE_POINTER)) {
|
|
gpointer ptr = g_value_get_pointer (&field->value);
|
|
|
|
if (!ptr)
|
|
g_string_append (s, "NULL");
|
|
else
|
|
g_string_append_printf (s, "%p", ptr);
|
|
} else {
|
|
if (!G_TYPE_CHECK_VALUE_TYPE (&field->value, G_TYPE_STRING))
|
|
GST_WARNING ("No value transform to serialize field '%s' of type '%s'",
|
|
g_quark_to_string (field->name),
|
|
_priv_gst_value_gtype_to_abbr (type));
|
|
/* TODO(ensonic): don't print NULL if field->value is not empty */
|
|
g_string_append (s, "NULL");
|
|
}
|
|
}
|
|
|
|
g_string_append_c (s, ';');
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean
|
|
priv__gst_structure_append_template_to_gstring (GQuark field_id,
|
|
const GValue * value, gpointer user_data)
|
|
{
|
|
GType type = gst_structure_value_get_generic_type (value);
|
|
GString *s = (GString *) user_data;
|
|
|
|
g_string_append_len (s, ", ", 2);
|
|
/* FIXME: do we need to escape fieldnames? */
|
|
g_string_append (s, g_quark_to_string (field_id));
|
|
g_string_append_len (s, "=(", 2);
|
|
g_string_append (s, _priv_gst_value_gtype_to_abbr (type));
|
|
g_string_append_c (s, ')');
|
|
|
|
//TODO(ensonic): table like GstStructureAbbreviation (or extend it)
|
|
if (type == G_TYPE_INT) {
|
|
g_string_append_len (s, "%i", 2);
|
|
} else if (type == G_TYPE_UINT) {
|
|
g_string_append_len (s, "%u", 2);
|
|
} else if (type == G_TYPE_FLOAT) {
|
|
g_string_append_len (s, "%f", 2);
|
|
} else if (type == G_TYPE_DOUBLE) {
|
|
g_string_append_len (s, "%lf", 3);
|
|
} else if (type == G_TYPE_STRING) {
|
|
g_string_append_len (s, "%s", 2);
|
|
} else if (type == G_TYPE_BOOLEAN) {
|
|
/* we normally store this as a string, but can parse it also from an int */
|
|
g_string_append_len (s, "%i", 2);
|
|
} else if (type == G_TYPE_INT64) {
|
|
g_string_append (s, "%" G_GINT64_FORMAT);
|
|
} else if (type == G_TYPE_UINT64) {
|
|
g_string_append (s, "%" G_GUINT64_FORMAT);
|
|
} else if (type == GST_TYPE_STRUCTURE) {
|
|
g_string_append (s, "%" GST_WRAPPED_PTR_FORMAT);
|
|
} else if (g_type_is_a (type, G_TYPE_ENUM)
|
|
|| g_type_is_a (type, G_TYPE_FLAGS)) {
|
|
g_string_append_len (s, "%i", 2);
|
|
} else if (type == G_TYPE_GTYPE) {
|
|
g_string_append_len (s, "%s", 2);
|
|
} else if (type == G_TYPE_POINTER) {
|
|
g_string_append_len (s, "%p", 2);
|
|
} else {
|
|
GST_WARNING ("unhandled type: %s", g_type_name (type));
|
|
g_string_append (s, "%" GST_WRAPPED_PTR_FORMAT);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gchar *
|
|
structure_serialize (const GstStructure * structure, GstSerializeFlags flags)
|
|
{
|
|
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));
|
|
g_string_append (s, g_quark_to_string (structure->name));
|
|
priv_gst_structure_append_to_gstring (structure, s, flags);
|
|
return g_string_free (s, FALSE);
|
|
|
|
}
|
|
|
|
/**
|
|
* 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: |[<!--
|
|
* language="C" --> GST_LOG ("structure is %" GST_PTR_FORMAT, structure);
|
|
* ]|
|
|
* This prints the structure in human readable form.
|
|
*
|
|
* This function will lead to unexpected results when there are nested #GstCaps
|
|
* / #GstStructure deeper than one level, you should user
|
|
* gst_structure_serialize() instead for those cases.
|
|
*
|
|
* Free-function: g_free
|
|
*
|
|
* Returns: (transfer full): a pointer to string allocated by g_malloc().
|
|
* g_free() after usage.
|
|
*/
|
|
gchar *
|
|
gst_structure_to_string (const GstStructure * structure)
|
|
{
|
|
return structure_serialize (structure, GST_SERIALIZE_FLAG_BACKWARD_COMPAT);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_serialize:
|
|
* @structure: a #GstStructure
|
|
* @flags: The flags to use to serialize structure
|
|
*
|
|
* Converts @structure to a human-readable string representation.
|
|
*
|
|
* This version of the caps serialization function introduces support for nested
|
|
* structures and caps but the resulting strings won't be parsable with
|
|
* GStreamer prior to 1.20 unless #GST_SERIALIZE_FLAG_BACKWARD_COMPAT is passed
|
|
* as @flag.
|
|
*
|
|
* Free-function: g_free
|
|
*
|
|
* Returns: (transfer full): a pointer to string allocated by g_malloc().
|
|
* g_free() after usage.
|
|
*
|
|
* Since: 1.20
|
|
*/
|
|
gchar *
|
|
gst_structure_serialize (const GstStructure * structure,
|
|
GstSerializeFlags flags)
|
|
{
|
|
return structure_serialize (structure, flags);
|
|
}
|
|
|
|
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 (!_priv_gst_value_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 (!_priv_gst_value_parse_value (s, &s, &field->value,
|
|
G_TYPE_INVALID, NULL))) {
|
|
GST_WARNING ("failed to parse value %s", str);
|
|
return FALSE;
|
|
}
|
|
|
|
*after = s;
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean
|
|
priv_gst_structure_parse_name (gchar * str, gchar ** start, gchar ** end,
|
|
gchar ** next, gboolean check_valid)
|
|
{
|
|
char *w;
|
|
char *r;
|
|
|
|
r = str;
|
|
|
|
/* skip spaces (FIXME: _isspace treats tabs and newlines as space!) */
|
|
while (*r && (g_ascii_isspace (*r) || (r[0] == '\\'
|
|
&& g_ascii_isspace (r[1]))))
|
|
r++;
|
|
|
|
*start = r;
|
|
|
|
if (G_UNLIKELY (!_priv_gst_value_parse_string (r, &w, &r, TRUE))) {
|
|
GST_WARNING ("Failed to parse structure string '%s'", str);
|
|
return FALSE;
|
|
}
|
|
|
|
if (check_valid) {
|
|
gchar save = *w;
|
|
|
|
*w = '\0';
|
|
if (!gst_structure_validate_name (*start)) {
|
|
*w = save;
|
|
return FALSE;
|
|
}
|
|
*w = save;
|
|
}
|
|
|
|
*end = w;
|
|
*next = r;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean
|
|
priv_gst_structure_parse_fields (gchar * str, gchar ** end,
|
|
GstStructure * structure)
|
|
{
|
|
gchar *r;
|
|
GstStructureField field;
|
|
|
|
r = str;
|
|
|
|
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);
|
|
return FALSE;
|
|
}
|
|
r++;
|
|
while (*r && (g_ascii_isspace (*r) || (r[0] == '\\'
|
|
&& g_ascii_isspace (r[1]))))
|
|
r++;
|
|
|
|
/* Trailing comma */
|
|
if (*r == '\0') {
|
|
break;
|
|
} else if (*r == ';') {
|
|
r++;
|
|
break;
|
|
}
|
|
|
|
memset (&field, 0, sizeof (field));
|
|
if (G_UNLIKELY (!gst_structure_parse_field (r, &r, &field))) {
|
|
GST_WARNING ("Failed to parse field, r=%s", r);
|
|
return FALSE;
|
|
}
|
|
gst_structure_set_field (structure, &field);
|
|
} while (TRUE);
|
|
|
|
*end = r;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_new_from_string:
|
|
* @string: a string representation of a #GstStructure
|
|
*
|
|
* 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.
|
|
*
|
|
* The current implementation of serialization will lead to unexpected results
|
|
* when there are nested #GstCaps / #GstStructure deeper than one level unless
|
|
* the gst_structure_serialize() function is used (without
|
|
* #GST_SERIALIZE_FLAG_BACKWARD_COMPAT)
|
|
*
|
|
* Free-function: gst_structure_free
|
|
*
|
|
* Returns: (transfer full) (nullable): a new #GstStructure or %NULL
|
|
* when the string could not be parsed. Free with
|
|
* gst_structure_free() after use.
|
|
*
|
|
* Since: 1.2
|
|
*/
|
|
GstStructure *
|
|
gst_structure_new_from_string (const gchar * string)
|
|
{
|
|
return gst_structure_from_string (string, NULL);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_from_string: (constructor):
|
|
* @string: a string representation of a #GstStructure.
|
|
* @end: (out) (allow-none) (transfer none) (skip): 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) (nullable): 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;
|
|
|
|
g_return_val_if_fail (string != NULL, NULL);
|
|
|
|
copy = g_strdup (string);
|
|
r = copy;
|
|
|
|
if (!priv_gst_structure_parse_name (r, &name, &w, &r, FALSE))
|
|
goto error;
|
|
|
|
save = *w;
|
|
*w = '\0';
|
|
structure = gst_structure_new_empty (name);
|
|
*w = save;
|
|
|
|
if (G_UNLIKELY (structure == NULL))
|
|
goto error;
|
|
|
|
if (!priv_gst_structure_parse_fields (r, &r, structure))
|
|
goto error;
|
|
|
|
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 min, max, step;
|
|
|
|
min = gst_value_get_int_range_min (value);
|
|
max = gst_value_get_int_range_max (value);
|
|
step = gst_value_get_int_range_step (value);
|
|
|
|
target = CLAMP (target, min, max);
|
|
if (G_UNLIKELY (step != 1)) {
|
|
gint rem = target % step;
|
|
target -= rem;
|
|
if (rem > step / 2)
|
|
target += step;
|
|
}
|
|
|
|
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
|
|
*/
|
|
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);
|
|
g_return_val_if_fail (target_denominator != 0, 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_take_value (s, field_id, &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); \
|
|
const 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
|
|
*/
|
|
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_INFO ("Expected field '%s' in structure: %" GST_PTR_FORMAT,
|
|
field_name, structure);
|
|
return FALSE;
|
|
}
|
|
wrong_type:
|
|
{
|
|
GST_INFO ("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
|
|
*/
|
|
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_DEBUG ("Expected field '%s' in structure: %" GST_PTR_FORMAT,
|
|
GST_STR_NULL (g_quark_to_string (field_id)), structure);
|
|
return FALSE;
|
|
}
|
|
wrong_type:
|
|
{
|
|
GST_DEBUG ("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 receive a new reference which
|
|
* you must release with a suitable _unref\() when no longer needed. For
|
|
* strings and boxed types you will receive 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.
|
|
*/
|
|
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 receive a new reference which
|
|
* you must release with a suitable _unref\() when no longer needed. For
|
|
* strings and boxed types you will receive 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.
|
|
*/
|
|
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.
|
|
**/
|
|
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_LEN (structure1) != GST_STRUCTURE_LEN (structure2)) {
|
|
return FALSE;
|
|
}
|
|
|
|
return gst_structure_foreach (structure1, gst_structure_is_equal_foreach,
|
|
(gpointer) structure2);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_intersect:
|
|
* @struct1: a #GstStructure
|
|
* @struct2: a #GstStructure
|
|
*
|
|
* Intersects @struct1 and @struct2 and returns the intersection.
|
|
*
|
|
* Returns: (nullable): Intersection of @struct1 and @struct2
|
|
*/
|
|
GstStructure *
|
|
gst_structure_intersect (const GstStructure * struct1,
|
|
const GstStructure * struct2)
|
|
{
|
|
guint it1, len1, it2, len2;
|
|
GstStructure *dest;
|
|
|
|
g_assert (struct1 != NULL);
|
|
g_assert (struct2 != NULL);
|
|
|
|
if (G_UNLIKELY (struct1->name != struct2->name))
|
|
return NULL;
|
|
|
|
len1 = GST_STRUCTURE_LEN (struct1);
|
|
len2 = GST_STRUCTURE_LEN (struct2);
|
|
|
|
/* Resulting structure will be at most the size of the smallest structure */
|
|
dest = gst_structure_new_id_empty_with_size (struct1->name, MIN (len1, len2));
|
|
|
|
/* copy fields from struct1 which we have not in struct2 to target
|
|
* intersect if we have the field in both */
|
|
for (it1 = 0; it1 < len1; it1++) {
|
|
GstStructureField *field1 = GST_STRUCTURE_FIELD (struct1, it1);
|
|
gboolean seenother = FALSE;
|
|
for (it2 = 0; it2 < len2; it2++) {
|
|
GstStructureField *field2 = GST_STRUCTURE_FIELD (struct2, it2);
|
|
if (field1->name == field2->name) {
|
|
GValue dest_value = { 0 };
|
|
seenother = TRUE;
|
|
/* Get the intersection if any */
|
|
if (gst_value_intersect (&dest_value, &field1->value, &field2->value)) {
|
|
gst_structure_id_take_value (dest, field1->name, &dest_value);
|
|
break;
|
|
} else {
|
|
/* No intersection, return nothing */
|
|
goto error;
|
|
}
|
|
}
|
|
}
|
|
/* Field1 was only present in struct1, copy it over */
|
|
if (!seenother)
|
|
gst_structure_id_set_value (dest, field1->name, &field1->value);
|
|
}
|
|
|
|
/* Now iterate over the 2nd struct and copy over everything which
|
|
* isn't present in the 1st struct (we've already taken care of
|
|
* values being present in both just above) */
|
|
for (it2 = 0; it2 < len2; it2++) {
|
|
GstStructureField *field2 = GST_STRUCTURE_FIELD (struct2, it2);
|
|
gboolean seenother = FALSE;
|
|
for (it1 = 0; it1 < len1; it1++) {
|
|
GstStructureField *field1 = GST_STRUCTURE_FIELD (struct1, it1);
|
|
if (field1->name == field2->name) {
|
|
seenother = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
if (!seenother)
|
|
gst_structure_id_set_value (dest, field2->name, &field2->value);
|
|
|
|
}
|
|
|
|
return dest;
|
|
|
|
error:
|
|
gst_structure_free (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
|
|
*/
|
|
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);
|
|
}
|
|
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
gboolean
|
|
gst_structure_is_subset (const GstStructure * subset,
|
|
const GstStructure * superset)
|
|
{
|
|
guint it1, len1, it2, len2;
|
|
|
|
g_assert (superset);
|
|
|
|
if (G_UNLIKELY (superset->name != subset->name))
|
|
return FALSE;
|
|
|
|
len1 = GST_STRUCTURE_LEN (subset);
|
|
len2 = GST_STRUCTURE_LEN (superset);
|
|
if (len2 > len1)
|
|
return FALSE;
|
|
|
|
for (it2 = 0; it2 < len2; it2++) {
|
|
GstStructureField *superfield = GST_STRUCTURE_FIELD (superset, it2);
|
|
gboolean seenother = FALSE;
|
|
for (it1 = 0; it1 < len1; it1++) {
|
|
GstStructureField *subfield = GST_STRUCTURE_FIELD (subset, it1);
|
|
if (subfield->name == superfield->name) {
|
|
int comparison =
|
|
gst_value_compare (&subfield->value, &superfield->value);
|
|
seenother = TRUE;
|
|
|
|
/* If present and equal, stop iterating */
|
|
if (comparison == GST_VALUE_EQUAL)
|
|
break;
|
|
|
|
/* Stop everything if ordered but unequal */
|
|
if (comparison != GST_VALUE_UNORDERED)
|
|
return FALSE;
|
|
|
|
/* Stop everything if not a subset */
|
|
if (!gst_value_is_subset (&subfield->value, &superfield->value))
|
|
return FALSE;
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* We did not see superfield in subfield */
|
|
if (!seenother)
|
|
return FALSE;
|
|
}
|
|
|
|
/* We saw everything from subset in the superset */
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
static gboolean
|
|
_gst_structure_get_any_list (GstStructure * structure, GType type,
|
|
const gchar * fieldname, GValueArray ** array)
|
|
{
|
|
GstStructureField *field;
|
|
GValue val = G_VALUE_INIT;
|
|
|
|
g_return_val_if_fail (structure != NULL, FALSE);
|
|
g_return_val_if_fail (fieldname != NULL, FALSE);
|
|
g_return_val_if_fail (array != NULL, FALSE);
|
|
|
|
field = gst_structure_get_field (structure, fieldname);
|
|
|
|
if (field == NULL || G_VALUE_TYPE (&field->value) != type)
|
|
return FALSE;
|
|
|
|
g_value_init (&val, G_TYPE_VALUE_ARRAY);
|
|
|
|
if (g_value_transform (&field->value, &val)) {
|
|
*array = g_value_get_boxed (&val);
|
|
return TRUE;
|
|
}
|
|
|
|
g_value_unset (&val);
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_array:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
* @array: (out): a pointer to a #GValueArray
|
|
*
|
|
* This is useful in language bindings where unknown #GValue types are not
|
|
* supported. This function will convert the %GST_TYPE_ARRAY into a newly
|
|
* allocated #GValueArray and return it through @array. Be aware that this is
|
|
* slower then getting the #GValue directly.
|
|
*
|
|
* Returns: %TRUE if the value could be set correctly. If there was no field
|
|
* with @fieldname or the existing field did not contain a %GST_TYPE_ARRAY,
|
|
* this function returns %FALSE.
|
|
*
|
|
* Since: 1.12
|
|
*/
|
|
gboolean
|
|
gst_structure_get_array (GstStructure * structure, const gchar * fieldname,
|
|
GValueArray ** array)
|
|
{
|
|
return _gst_structure_get_any_list (structure, GST_TYPE_ARRAY, fieldname,
|
|
array);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_get_list:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
* @array: (out): a pointer to a #GValueArray
|
|
*
|
|
* This is useful in language bindings where unknown #GValue types are not
|
|
* supported. This function will convert the %GST_TYPE_LIST into a newly
|
|
* allocated GValueArray and return it through @array. Be aware that this is
|
|
* slower then getting the #GValue directly.
|
|
*
|
|
* Returns: %TRUE if the value could be set correctly. If there was no field
|
|
* with @fieldname or the existing field did not contain a %GST_TYPE_LIST, this
|
|
* function returns %FALSE.
|
|
*
|
|
* Since: 1.12
|
|
*/
|
|
gboolean
|
|
gst_structure_get_list (GstStructure * structure, const gchar * fieldname,
|
|
GValueArray ** array)
|
|
{
|
|
return _gst_structure_get_any_list (structure, GST_TYPE_LIST, fieldname,
|
|
array);
|
|
}
|
|
|
|
static void
|
|
_gst_structure_set_any_list (GstStructure * structure, GType type,
|
|
const gchar * fieldname, const GValueArray * array)
|
|
{
|
|
GValue arval = G_VALUE_INIT;
|
|
GValue value = G_VALUE_INIT;
|
|
|
|
g_return_if_fail (structure != NULL);
|
|
g_return_if_fail (fieldname != NULL);
|
|
g_return_if_fail (array != NULL);
|
|
g_return_if_fail (IS_MUTABLE (structure));
|
|
|
|
g_value_init (&value, type);
|
|
g_value_init (&arval, G_TYPE_VALUE_ARRAY);
|
|
g_value_set_static_boxed (&arval, array);
|
|
|
|
if (g_value_transform (&arval, &value)) {
|
|
gst_structure_id_set_value_internal (structure,
|
|
g_quark_from_string (fieldname), &value);
|
|
} else {
|
|
g_warning ("Failed to convert a GValueArray");
|
|
}
|
|
|
|
g_value_unset (&arval);
|
|
g_value_unset (&value);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_set_array:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
* @array: a pointer to a #GValueArray
|
|
*
|
|
* This is useful in language bindings where unknown GValue types are not
|
|
* supported. This function will convert a @array to %GST_TYPE_ARRAY and set
|
|
* the field specified by @fieldname. Be aware that this is slower then using
|
|
* %GST_TYPE_ARRAY in a #GValue directly.
|
|
*
|
|
* Since: 1.12
|
|
*/
|
|
void
|
|
gst_structure_set_array (GstStructure * structure, const gchar * fieldname,
|
|
const GValueArray * array)
|
|
{
|
|
_gst_structure_set_any_list (structure, GST_TYPE_ARRAY, fieldname, array);
|
|
}
|
|
|
|
/**
|
|
* gst_structure_set_list:
|
|
* @structure: a #GstStructure
|
|
* @fieldname: the name of a field
|
|
* @array: a pointer to a #GValueArray
|
|
*
|
|
* This is useful in language bindings where unknown GValue types are not
|
|
* supported. This function will convert a @array to %GST_TYPE_LIST and set
|
|
* the field specified by @fieldname. Be aware that this is slower then using
|
|
* %GST_TYPE_LIST in a #GValue directly.
|
|
*
|
|
* Since: 1.12
|
|
*/
|
|
void
|
|
gst_structure_set_list (GstStructure * structure, const gchar * fieldname,
|
|
const GValueArray * array)
|
|
{
|
|
_gst_structure_set_any_list (structure, GST_TYPE_LIST, fieldname, array);
|
|
}
|