/**
* SECTION:gststructure
+ * @title: GstStructure
* @short_description: Generic structure containing fields of names and values
* @see_also: #GstCaps, #GstMessage, #GstEvent, #GstQuery
*
#include "config.h"
#endif
+/* FIXME 2.0: suppress warnings for deprecated API such as GValueArray
+ * with newer GLib versions (>= 2.31.0) */
+#define GLIB_DISABLE_DEPRECATION_WARNINGS
+
#include <string.h>
#include "gst_private.h"
GValue * dest_value);
static GstStructure *gst_structure_copy_conditional (const GstStructure *
structure);
-static gboolean gst_structure_parse_value (gchar * str, gchar ** after,
- GValue * value, GType default_type);
-static gboolean gst_structure_parse_simple_string (gchar * s, gchar ** end);
GType _gst_structure_type = 0;
}
/**
+ * 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_get_name:
* @structure: a #GstStructure
*
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: the name of the field to set
* @...: variable arguments
*
- * Parses the variable arguments and sets fields accordingly.
+ * 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.
*/
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);
*
* Get the value of the field with name @fieldname.
*
- * Returns: the #GValue corresponding to the field with the given name.
+ * Returns: (nullable): the #GValue corresponding to the field with the given
+ * name.
*/
const GValue *
gst_structure_get_value (const GstStructure * structure,
*
* Get the value of the field with GQuark @field.
*
- * Returns: the #GValue corresponding to the field with the given name
- * identifier.
+ * 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)
return TRUE;
}
-typedef struct _GstStructureAbbreviation
-{
- const gchar *type_name;
- GType type;
-}
-GstStructureAbbreviation;
-
-/* return a copy of an array of GstStructureAbbreviation containing all the
- * known type_string, GType maps, including abbreviations for common types */
-static GstStructureAbbreviation *
-gst_structure_get_abbrs (gint * n_abbrs)
-{
- static GstStructureAbbreviation *abbrs = NULL;
- static volatile gsize num = 0;
-
- if (g_once_init_enter (&num)) {
- /* dynamically generate the array */
- gsize _num;
- GstStructureAbbreviation dyn_abbrs[] = {
- {"int", G_TYPE_INT}
- ,
- {"i", G_TYPE_INT}
- ,
- {"uint", G_TYPE_UINT}
- ,
- {"u", G_TYPE_UINT}
- ,
- {"float", G_TYPE_FLOAT}
- ,
- {"f", G_TYPE_FLOAT}
- ,
- {"double", G_TYPE_DOUBLE}
- ,
- {"d", G_TYPE_DOUBLE}
- ,
- {"buffer", GST_TYPE_BUFFER}
- ,
- {"fraction", GST_TYPE_FRACTION}
- ,
- {"boolean", G_TYPE_BOOLEAN}
- ,
- {"bool", G_TYPE_BOOLEAN}
- ,
- {"b", G_TYPE_BOOLEAN}
- ,
- {"string", G_TYPE_STRING}
- ,
- {"str", G_TYPE_STRING}
- ,
- {"s", G_TYPE_STRING}
- ,
- {"structure", GST_TYPE_STRUCTURE}
- ,
- {"date", G_TYPE_DATE}
- ,
- {"datetime", GST_TYPE_DATE_TIME}
- ,
- {"bitmask", GST_TYPE_BITMASK}
- ,
- {"sample", GST_TYPE_SAMPLE}
- ,
- {"taglist", GST_TYPE_TAG_LIST}
- };
- _num = G_N_ELEMENTS (dyn_abbrs);
- /* permanently allocate and copy the array now */
- abbrs = g_new0 (GstStructureAbbreviation, _num);
- memcpy (abbrs, dyn_abbrs, sizeof (GstStructureAbbreviation) * _num);
- g_once_init_leave (&num, _num);
- }
- *n_abbrs = num;
-
- return abbrs;
-}
-
-/* given a type_name that could be a type abbreviation or a registered GType,
- * return a matching GType */
static GType
-gst_structure_gtype_from_abbr (const char *type_name)
-{
- int i;
- GstStructureAbbreviation *abbrs;
- gint n_abbrs;
-
- g_return_val_if_fail (type_name != NULL, G_TYPE_INVALID);
-
- abbrs = gst_structure_get_abbrs (&n_abbrs);
-
- for (i = 0; i < n_abbrs; i++) {
- if (strcmp (type_name, abbrs[i].type_name) == 0) {
- return abbrs[i].type;
- }
- }
-
- /* this is the fallback */
- return g_type_from_name (type_name);
-}
-
-static const char *
-gst_structure_to_abbr (GType type)
-{
- int i;
- GstStructureAbbreviation *abbrs;
- gint n_abbrs;
-
- g_return_val_if_fail (type != G_TYPE_INVALID, NULL);
-
- abbrs = gst_structure_get_abbrs (&n_abbrs);
-
- for (i = 0; i < n_abbrs; i++) {
- if (type == abbrs[i].type) {
- return abbrs[i].type_name;
- }
- }
-
- return g_type_name (type);
-}
-
-static GType
-gst_structure_value_get_generic_type (GValue * val)
+gst_structure_value_get_generic_type (const GValue * val)
{
if (G_VALUE_TYPE (val) == GST_TYPE_LIST
|| G_VALUE_TYPE (val) == GST_TYPE_ARRAY) {
field = GST_STRUCTURE_FIELD (structure, i);
- t = gst_value_serialize (&field->value);
+ 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 {
+ t = gst_value_serialize (&field->value);
+ }
+
type = gst_structure_value_get_generic_type (&field->value);
g_string_append_len (s, ", ", 2);
/* FIXME: do we need to escape fieldnames? */
g_string_append (s, g_quark_to_string (field->name));
g_string_append_len (s, "=(", 2);
- g_string_append (s, gst_structure_to_abbr (type));
+ g_string_append (s, _priv_gst_value_gtype_to_abbr (type));
g_string_append_c (s, ')');
- g_string_append (s, t == NULL ? "NULL" : t);
- g_free (t);
+ 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;
+}
+
/**
* 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.
return g_string_free (s, FALSE);
}
-/*
- * r will still point to the string. if end == next, the string will not be
- * null-terminated. In all other cases it will be.
- * end = pointer to char behind end of string, next = pointer to start of
- * unread data.
- * THIS FUNCTION MODIFIES THE STRING AND DETECTS INSIDE A NONTERMINATED STRING
- */
-static gboolean
-gst_structure_parse_string (gchar * s, gchar ** end, gchar ** next,
- gboolean unescape)
-{
- gchar *w;
-
- if (*s == 0)
- return FALSE;
-
- if (*s != '"') {
- int ret;
-
- ret = gst_structure_parse_simple_string (s, end);
- *next = *end;
-
- return ret;
- }
-
- if (unescape) {
- w = s;
- s++;
- while (*s != '"') {
- if (G_UNLIKELY (*s == 0))
- return FALSE;
- if (G_UNLIKELY (*s == '\\')) {
- s++;
- if (G_UNLIKELY (*s == 0))
- return FALSE;
- }
- *w = *s;
- w++;
- s++;
- }
- s++;
- } else {
- /* Find the closing quotes */
- s++;
- while (*s != '"') {
- if (G_UNLIKELY (*s == 0))
- return FALSE;
- if (G_UNLIKELY (*s == '\\')) {
- s++;
- if (G_UNLIKELY (*s == 0))
- return FALSE;
- }
- s++;
- }
- s++;
- w = s;
- }
-
- *end = w;
- *next = s;
-
- return TRUE;
-}
-
-static gboolean
-gst_structure_parse_range (gchar * s, gchar ** after, GValue * value,
- GType type)
-{
- GValue value1 = { 0 };
- GValue value2 = { 0 };
- GValue value3 = { 0 };
- GType range_type;
- gboolean ret, have_step = FALSE;
-
- if (*s != '[')
- return FALSE;
- s++;
-
- ret = gst_structure_parse_value (s, &s, &value1, type);
- if (!ret)
- return FALSE;
-
- while (g_ascii_isspace (*s))
- s++;
-
- if (*s != ',')
- return FALSE;
- s++;
-
- while (g_ascii_isspace (*s))
- s++;
-
- ret = gst_structure_parse_value (s, &s, &value2, type);
- if (!ret)
- return FALSE;
-
- while (g_ascii_isspace (*s))
- s++;
-
- /* optional step for int and int64 */
- if (G_VALUE_TYPE (&value1) == G_TYPE_INT
- || G_VALUE_TYPE (&value1) == G_TYPE_INT64) {
- if (*s == ',') {
- s++;
-
- while (g_ascii_isspace (*s))
- s++;
-
- ret = gst_structure_parse_value (s, &s, &value3, type);
- if (!ret)
- return FALSE;
-
- while (g_ascii_isspace (*s))
- s++;
-
- have_step = TRUE;
- }
- }
-
- if (*s != ']')
- return FALSE;
- s++;
-
- if (G_VALUE_TYPE (&value1) != G_VALUE_TYPE (&value2))
- return FALSE;
- if (have_step && G_VALUE_TYPE (&value1) != G_VALUE_TYPE (&value3))
- return FALSE;
-
- if (G_VALUE_TYPE (&value1) == G_TYPE_DOUBLE) {
- range_type = GST_TYPE_DOUBLE_RANGE;
- g_value_init (value, range_type);
- gst_value_set_double_range (value,
- gst_g_value_get_double_unchecked (&value1),
- gst_g_value_get_double_unchecked (&value2));
- } else if (G_VALUE_TYPE (&value1) == G_TYPE_INT) {
- range_type = GST_TYPE_INT_RANGE;
- g_value_init (value, range_type);
- if (have_step)
- gst_value_set_int_range_step (value,
- gst_g_value_get_int_unchecked (&value1),
- gst_g_value_get_int_unchecked (&value2),
- gst_g_value_get_int_unchecked (&value3));
- else
- gst_value_set_int_range (value, gst_g_value_get_int_unchecked (&value1),
- gst_g_value_get_int_unchecked (&value2));
- } else if (G_VALUE_TYPE (&value1) == G_TYPE_INT64) {
- range_type = GST_TYPE_INT64_RANGE;
- g_value_init (value, range_type);
- if (have_step)
- gst_value_set_int64_range_step (value,
- gst_g_value_get_int64_unchecked (&value1),
- gst_g_value_get_int64_unchecked (&value2),
- gst_g_value_get_int64_unchecked (&value3));
- else
- gst_value_set_int64_range (value,
- gst_g_value_get_int64_unchecked (&value1),
- gst_g_value_get_int64_unchecked (&value2));
- } else if (G_VALUE_TYPE (&value1) == GST_TYPE_FRACTION) {
- range_type = GST_TYPE_FRACTION_RANGE;
- g_value_init (value, range_type);
- gst_value_set_fraction_range (value, &value1, &value2);
- } else {
- return FALSE;
- }
-
- *after = s;
- return TRUE;
-}
-
-static gboolean
-gst_structure_parse_any_list (gchar * s, gchar ** after, GValue * value,
- GType type, GType list_type, char begin, char end)
-{
- GValue list_value = { 0 };
- gboolean ret;
- GArray *array;
-
- g_value_init (value, list_type);
- array = g_value_peek_pointer (value);
-
- if (*s != begin)
- return FALSE;
- s++;
-
- while (g_ascii_isspace (*s))
- s++;
- if (*s == end) {
- s++;
- *after = s;
- return TRUE;
- }
-
- ret = gst_structure_parse_value (s, &s, &list_value, type);
- if (!ret)
- return FALSE;
-
- g_array_append_val (array, list_value);
-
- while (g_ascii_isspace (*s))
- s++;
-
- while (*s != end) {
- if (*s != ',')
- return FALSE;
- s++;
-
- while (g_ascii_isspace (*s))
- s++;
-
- memset (&list_value, 0, sizeof (list_value));
- ret = gst_structure_parse_value (s, &s, &list_value, type);
- if (!ret)
- return FALSE;
-
- g_array_append_val (array, list_value);
- while (g_ascii_isspace (*s))
- s++;
- }
-
- s++;
-
- *after = s;
- return TRUE;
-}
-
-static gboolean
-gst_structure_parse_list (gchar * s, gchar ** after, GValue * value, GType type)
-{
- return gst_structure_parse_any_list (s, after, value, type, GST_TYPE_LIST,
- '{', '}');
-}
-
-static gboolean
-gst_structure_parse_array (gchar * s, gchar ** after, GValue * value,
- GType type)
-{
- return gst_structure_parse_any_list (s, after, value, type,
- GST_TYPE_ARRAY, '<', '>');
-}
-
-static gboolean
-gst_structure_parse_simple_string (gchar * str, gchar ** end)
-{
- char *s = str;
-
- while (G_LIKELY (GST_ASCII_IS_STRING (*s))) {
- s++;
- }
-
- *end = s;
-
- return (s != str);
-}
-
static gboolean
gst_structure_parse_field (gchar * str,
gchar ** after, GstStructureField * field)
while (g_ascii_isspace (*s) || (s[0] == '\\' && g_ascii_isspace (s[1])))
s++;
name = s;
- if (G_UNLIKELY (!gst_structure_parse_simple_string (s, &name_end))) {
+ if (G_UNLIKELY (!_priv_gst_value_parse_simple_string (s, &name_end))) {
GST_WARNING ("failed to parse simple string, str=%s", str);
return FALSE;
}
GST_DEBUG ("trying field name '%s'", name);
*name_end = c;
- if (G_UNLIKELY (!gst_structure_parse_value (s, &s, &field->value,
+ if (G_UNLIKELY (!_priv_gst_value_parse_value (s, &s, &field->value,
G_TYPE_INVALID))) {
GST_WARNING ("failed to parse value %s", str);
return FALSE;
return TRUE;
}
-static gboolean
-gst_structure_parse_value (gchar * str,
- gchar ** after, GValue * value, GType default_type)
-{
- gchar *type_name;
- gchar *type_end;
- gchar *value_s;
- gchar *value_end;
- gchar *s;
- gchar c;
- int ret = 0;
- GType type = default_type;
-
- s = str;
- while (g_ascii_isspace (*s))
- s++;
-
- /* check if there's a (type_name) 'cast' */
- type_name = NULL;
- if (*s == '(') {
- s++;
- while (g_ascii_isspace (*s))
- s++;
- type_name = s;
- if (G_UNLIKELY (!gst_structure_parse_simple_string (s, &type_end)))
- return FALSE;
- s = type_end;
- while (g_ascii_isspace (*s))
- s++;
- if (G_UNLIKELY (*s != ')'))
- return FALSE;
- s++;
- while (g_ascii_isspace (*s))
- s++;
-
- c = *type_end;
- *type_end = 0;
- type = gst_structure_gtype_from_abbr (type_name);
- GST_DEBUG ("trying type name '%s'", type_name);
- *type_end = c;
-
- if (G_UNLIKELY (type == G_TYPE_INVALID)) {
- GST_WARNING ("invalid type");
- return FALSE;
- }
- }
-
- while (g_ascii_isspace (*s))
- s++;
- if (*s == '[') {
- ret = gst_structure_parse_range (s, &s, value, type);
- } else if (*s == '{') {
- ret = gst_structure_parse_list (s, &s, value, type);
- } else if (*s == '<') {
- ret = gst_structure_parse_array (s, &s, value, type);
- } else {
- value_s = s;
-
- if (G_UNLIKELY (type == G_TYPE_INVALID)) {
- GType try_types[] =
- { G_TYPE_INT, G_TYPE_DOUBLE, GST_TYPE_FRACTION, GST_TYPE_FLAG_SET,
- G_TYPE_BOOLEAN, G_TYPE_STRING
- };
- int i;
-
- if (G_UNLIKELY (!gst_structure_parse_string (s, &value_end, &s, TRUE)))
- return FALSE;
- /* Set NULL terminator for deserialization */
- c = *value_end;
- *value_end = '\0';
-
- for (i = 0; i < G_N_ELEMENTS (try_types); i++) {
- g_value_init (value, try_types[i]);
- ret = gst_value_deserialize (value, value_s);
- if (ret)
- break;
- g_value_unset (value);
- }
- } else {
- g_value_init (value, type);
-
- if (G_UNLIKELY (!gst_structure_parse_string (s, &value_end, &s,
- (type != G_TYPE_STRING))))
- return FALSE;
- /* Set NULL terminator for deserialization */
- c = *value_end;
- *value_end = '\0';
-
- ret = gst_value_deserialize (value, value_s);
- if (G_UNLIKELY (!ret))
- g_value_unset (value);
- }
- *value_end = c;
- }
-
- *after = s;
-
- return ret;
-}
-
gboolean
priv_gst_structure_parse_name (gchar * str, gchar ** start, gchar ** end,
gchar ** next)
*start = r;
- if (G_UNLIKELY (!gst_structure_parse_string (r, &w, &r, TRUE))) {
+ if (G_UNLIKELY (!_priv_gst_value_parse_string (r, &w, &r, TRUE))) {
GST_WARNING ("Failed to parse structure string '%s'", str);
return FALSE;
}
/* already fixed */
return FALSE;
} else if (G_VALUE_TYPE (value) == GST_TYPE_INT_RANGE) {
- int x;
+ 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;
+ }
- x = gst_value_get_int_range_min (value);
- if (target < x)
- target = x;
- x = gst_value_get_int_range_max (value);
- if (target > x)
- target = x;
gst_structure_set (structure, field_name, G_TYPE_INT, target, NULL);
return TRUE;
} else if (G_VALUE_TYPE (value) == GST_TYPE_LIST) {
*
* Intersects @struct1 and @struct2 and returns the intersection.
*
- * Returns: Intersection of @struct1 and @struct2
+ * Returns: (nullable): Intersection of @struct1 and @struct2
*/
GstStructure *
gst_structure_intersect (const GstStructure * struct1,
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.
+ */
+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);
+}
projects / platform / upstream / gstreamer.git / blobdiff