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gstreamer/gst/gstvalue.c
Thibault Saunier 88f0312624 value: Fix segfault comparing empty GValueArrays 
Adding a test
2020-04-12 20:33:43 -04:00

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/* GStreamer
* Copyright (C) <2003> David A. Schleef <ds@schleef.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gstvalue
* @title: GstValue
* @short_description: GValue implementations specific
* to GStreamer
*
* GValue implementations specific to GStreamer.
*
* Note that operations on the same #GValue from multiple threads may lead to
* undefined behaviour.
*/
/* Suppress warnings for GValueAraray */
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "gst_private.h"
#include "glib-compat-private.h"
#include <gst/gst.h>
#include <gobject/gvaluecollector.h>
#include "gstutils.h"
/* GstValueUnionFunc:
* @dest: a #GValue for the result
* @value1: a #GValue operand
* @value2: a #GValue operand
*
* Used by gst_value_union() to perform unification for a specific #GValue
* type. Register a new implementation with gst_value_register_union_func().
*
* Returns: %TRUE if a union was successful
*/
typedef gboolean (*GstValueUnionFunc) (GValue * dest,
const GValue * value1, const GValue * value2);
/* GstValueIntersectFunc:
* @dest: (out caller-allocates): a #GValue for the result
* @value1: a #GValue operand
* @value2: a #GValue operand
*
* Used by gst_value_intersect() to perform intersection for a specific #GValue
* type. If the intersection is non-empty, the result is
* placed in @dest and %TRUE is returned. If the intersection is
* empty, @dest is unmodified and %FALSE is returned.
* Register a new implementation with gst_value_register_intersect_func().
*
* Returns: %TRUE if the values can intersect
*/
typedef gboolean (*GstValueIntersectFunc) (GValue * dest,
const GValue * value1, const GValue * value2);
/* GstValueSubtractFunc:
* @dest: (out caller-allocates): a #GValue for the result
* @minuend: a #GValue operand
* @subtrahend: a #GValue operand
*
* Used by gst_value_subtract() to perform subtraction for a specific #GValue
* type. Register a new implementation with gst_value_register_subtract_func().
*
* Returns: %TRUE if the subtraction is not empty
*/
typedef gboolean (*GstValueSubtractFunc) (GValue * dest,
const GValue * minuend, const GValue * subtrahend);
static void gst_value_register_union_func (GType type1,
GType type2, GstValueUnionFunc func);
static void gst_value_register_intersect_func (GType type1,
GType type2, GstValueIntersectFunc func);
static void gst_value_register_subtract_func (GType minuend_type,
GType subtrahend_type, GstValueSubtractFunc func);
static gboolean _priv_gst_value_parse_list (gchar * s, gchar ** after,
GValue * value, GType type);
static gboolean _priv_gst_value_parse_array (gchar * s, gchar ** after,
GValue * value, GType type);
typedef struct _GstValueUnionInfo GstValueUnionInfo;
struct _GstValueUnionInfo
{
GType type1;
GType type2;
GstValueUnionFunc func;
};
typedef struct _GstValueIntersectInfo GstValueIntersectInfo;
struct _GstValueIntersectInfo
{
GType type1;
GType type2;
GstValueIntersectFunc func;
};
typedef struct _GstValueSubtractInfo GstValueSubtractInfo;
struct _GstValueSubtractInfo
{
GType minuend;
GType subtrahend;
GstValueSubtractFunc func;
};
struct _GstFlagSetClass
{
GTypeClass parent;
GType flags_type; /* Type of the GFlags this flagset carries (can be 0) */
};
typedef struct _GstFlagSetClass GstFlagSetClass;
typedef struct _GstValueAbbreviation GstValueAbbreviation;
struct _GstValueAbbreviation
{
const gchar *type_name;
GType type;
};
/* Actual internal implementation of "GstValueList" and
* "GstValueArray" */
typedef struct _GstValueList GstValueList;
struct _GstValueList
{
/* These 2 fields must remain the same so that they match the public
* GArray structure (which was the former implementation) just in
* case someone calls `gst_value_peek_pointer` to access the
* array/list (such as in gststructure.c) */
GValue *fields;
guint len;
guint allocated;
GValue arr[1];
};
#define FUNDAMENTAL_TYPE_ID_MAX \
(G_TYPE_FUNDAMENTAL_MAX >> G_TYPE_FUNDAMENTAL_SHIFT)
#define FUNDAMENTAL_TYPE_ID(type) \
((type) >> G_TYPE_FUNDAMENTAL_SHIFT)
#define VALUE_LIST_ARRAY(v) ((GstValueList *) (v)->data[0].v_pointer)
#define VALUE_LIST_SIZE(v) (VALUE_LIST_ARRAY(v)->len)
#define VALUE_LIST_GET_VALUE(v, index) ((const GValue *) &(VALUE_LIST_ARRAY(v)->fields[index]))
#define VALUE_LIST_IS_USING_DYNAMIC_ARRAY(array) ((array)->fields != &(array)->arr[0])
static GArray *gst_value_table;
static GHashTable *gst_value_hash;
static GstValueTable *gst_value_tables_fundamental[FUNDAMENTAL_TYPE_ID_MAX + 1];
static GArray *gst_value_union_funcs;
static GArray *gst_value_intersect_funcs;
static GArray *gst_value_subtract_funcs;
/* Forward declarations */
static gchar *gst_value_serialize_fraction (const GValue * value);
static GstValueCompareFunc gst_value_get_compare_func (const GValue * value1);
static gint gst_value_compare_with_func (const GValue * value1,
const GValue * value2, GstValueCompareFunc compare);
static gchar *gst_string_wrap (const gchar * s);
static gchar *gst_string_unwrap (const gchar * s);
static void gst_value_move (GValue * dest, GValue * src);
static void _gst_value_list_append_and_take_value (GValue * value,
GValue * append_value);
static void _gst_value_array_append_and_take_value (GValue * value,
GValue * append_value);
static inline GstValueTable *
gst_value_hash_lookup_type (GType type)
{
if (G_LIKELY (G_TYPE_IS_FUNDAMENTAL (type)))
return gst_value_tables_fundamental[FUNDAMENTAL_TYPE_ID (type)];
else
return g_hash_table_lookup (gst_value_hash, (gpointer) type);
}
static void
gst_value_hash_add_type (GType type, const GstValueTable * table)
{
if (G_TYPE_IS_FUNDAMENTAL (type))
gst_value_tables_fundamental[FUNDAMENTAL_TYPE_ID (type)] = (gpointer) table;
g_hash_table_insert (gst_value_hash, (gpointer) type, (gpointer) table);
}
/********
* list *
********/
static void
resize_value_list (GstValueList * vlist)
{
guint want_alloc;
if (G_UNLIKELY (vlist->allocated > (G_MAXUINT / 2)))
g_error ("Growing GstValueList would result in overflow");
want_alloc = MAX (GST_ROUND_UP_8 (vlist->len + 1), vlist->allocated * 2);
if (VALUE_LIST_IS_USING_DYNAMIC_ARRAY (vlist)) {
vlist->fields = g_renew (GValue, vlist->fields, want_alloc);
} else {
vlist->fields = g_new0 (GValue, want_alloc);
memcpy (vlist->fields, &vlist->arr[0], vlist->len * sizeof (GValue));
GST_CAT_LOG (GST_CAT_PERFORMANCE, "Exceeding pre-allocated array");
}
vlist->allocated = want_alloc;
}
/* Replacement for g_array_append_val */
static void
_gst_value_list_append_val (GstValueList * vlist, GValue * val)
{
/* resize if needed */
if (G_UNLIKELY (vlist->len == vlist->allocated))
resize_value_list (vlist);
/* Finally set value */
vlist->fields[vlist->len++] = *val;
}
/* Replacement for g_array_prepend_val */
static void
_gst_value_list_prepend_val (GstValueList * vlist, GValue * val)
{
/* resize if needed */
if (G_UNLIKELY (vlist->len == vlist->allocated))
resize_value_list (vlist);
/* Shift everything */
memmove (&vlist->fields[1], &vlist->fields[0],
(vlist->len) * sizeof (GValue));
vlist->fields[0] = *val;
vlist->len++;
}
static GstValueList *
_gst_value_list_new (guint prealloc)
{
guint n_alloc;
GstValueList *res;
if (prealloc == 0)
prealloc = 1;
n_alloc = GST_ROUND_UP_8 (prealloc);
res = g_malloc0 (sizeof (GstValueList) + (n_alloc - 1) * sizeof (GValue));
res->len = 0;
res->allocated = n_alloc;
res->fields = &res->arr[0];
return res;
}
static void
_gst_value_list_init (GValue * value, guint prealloc)
{
value->g_type = GST_TYPE_LIST;
memset (value->data, 0, sizeof (value->data));
value->data[0].v_pointer = _gst_value_list_new (prealloc);
}
/**
* gst_value_list_init:
* @value: A zero-filled (uninitialized) #GValue structure
* @prealloc: The number of entries to pre-allocate in the list
*
* Initializes and pre-allocates a #GValue of type #GST_VALUE_LIST.
*
* Returns: (transfer none): The #GValue structure that has been passed in
*
* Since: 1.18
*/
GValue *
gst_value_list_init (GValue * value, guint prealloc)
{
g_return_val_if_fail (value != NULL, NULL);
g_return_val_if_fail (G_VALUE_TYPE (value) == 0, NULL);
_gst_value_list_init (value, prealloc);
return value;
}
static void
_gst_value_array_init (GValue * value, guint prealloc)
{
value->g_type = GST_TYPE_ARRAY;
memset (value->data, 0, sizeof (value->data));
value->data[0].v_pointer = _gst_value_list_new (prealloc);
}
/**
* gst_value_array_init:
* @value: A zero-filled (uninitialized) #GValue structure
* @prealloc: The number of entries to pre-allocate in the array
*
* Initializes and pre-allocates a #GValue of type #GST_VALUE_ARRAY.
*
* Returns: (transfer none): The #GValue structure that has been passed in
*
* Since: 1.18
*/
GValue *
gst_value_array_init (GValue * value, guint prealloc)
{
g_return_val_if_fail (value != NULL, NULL);
g_return_val_if_fail (G_VALUE_TYPE (value) == 0, NULL);
_gst_value_array_init (value, prealloc);
return value;
}
/* two helper functions to serialize/stringify any type of list
* regular lists are done with { }, arrays with < >
*/
gchar *
_priv_gst_value_serialize_any_list (const GValue * value, const gchar * begin,
const gchar * end, gboolean print_type)
{
guint i;
GstValueList *vlist = value->data[0].v_pointer;
GString *s;
GValue *v;
gchar *s_val;
guint alen = vlist->len;
/* estimate minimum string length to minimise re-allocs in GString */
s = g_string_sized_new (2 + (6 * alen) + 2);
g_string_append (s, begin);
for (i = 0; i < alen; i++) {
v = &vlist->fields[i];
s_val = gst_value_serialize (v);
if (s_val != NULL) {
if (print_type) {
g_string_append_c (s, '(');
g_string_append (s, _priv_gst_value_gtype_to_abbr (G_VALUE_TYPE (v)));
g_string_append_c (s, ')');
}
g_string_append (s, s_val);
g_free (s_val);
if (i < alen - 1) {
g_string_append_len (s, ", ", 2);
}
} else {
GST_WARNING ("Could not serialize list/array value of type '%s'",
G_VALUE_TYPE_NAME (v));
}
}
g_string_append (s, end);
return g_string_free (s, FALSE);
}
static void
gst_value_transform_any_list_string (const GValue * src_value,
GValue * dest_value, const gchar * begin, const gchar * end)
{
GValue *list_value;
GstValueList *array;
GString *s;
guint i;
gchar *list_s;
guint alen;
array = src_value->data[0].v_pointer;
alen = array->len;
/* estimate minimum string length to minimise re-allocs in GString */
s = g_string_sized_new (2 + (10 * alen) + 2);
g_string_append (s, begin);
for (i = 0; i < alen; i++) {
list_value = &array->fields[i];
if (i != 0) {
g_string_append_len (s, ", ", 2);
}
list_s = g_strdup_value_contents (list_value);
g_string_append (s, list_s);
g_free (list_s);
}
g_string_append (s, end);
dest_value->data[0].v_pointer = g_string_free (s, FALSE);
}
static gchar *
_gst_value_serialize_g_value_array (const GValue * value, const gchar * begin,
const gchar * end)
{
guint i;
GValueArray *array = value->data[0].v_pointer;
GString *s;
GValue *v;
gchar *s_val;
guint alen = 0;
if (array)
alen = array->n_values;
/* estimate minimum string length to minimise re-allocs in GString */
s = g_string_sized_new (2 + (6 * alen) + 2);
g_string_append (s, begin);
for (i = 0; i < alen; i++) {
v = g_value_array_get_nth (array, i);
s_val = gst_value_serialize (v);
if (s_val != NULL) {
g_string_append (s, s_val);
g_free (s_val);
if (i < alen - 1) {
g_string_append_len (s, ", ", 2);
}
} else {
GST_WARNING ("Could not serialize list/array value of type '%s'",
G_VALUE_TYPE_NAME (v));
}
}
g_string_append (s, end);
return g_string_free (s, FALSE);
}
static void
_gst_value_transform_g_value_array_string (const GValue * src_value,
GValue * dest_value, const gchar * begin, const gchar * end)
{
GValue *list_value;
GValueArray *array;
GString *s;
guint i;
gchar *list_s;
guint alen;
array = src_value->data[0].v_pointer;
alen = array->n_values;
/* estimate minimum string length to minimise re-allocs in GString */
s = g_string_sized_new (2 + (10 * alen) + 2);
g_string_append (s, begin);
for (i = 0; i < alen; i++) {
list_value = g_value_array_get_nth (array, i);
if (i != 0) {
g_string_append_len (s, ", ", 2);
}
list_s = g_strdup_value_contents (list_value);
g_string_append (s, list_s);
g_free (list_s);
}
g_string_append (s, end);
dest_value->data[0].v_pointer = g_string_free (s, FALSE);
}
/*
* helper function to see if a type is fixed. Is used internally here and
* there. Do not export, since it doesn't work for types where the content
* decides the fixedness (e.g. GST_TYPE_ARRAY).
*/
static gboolean
gst_type_is_fixed (GType type)
{
/* the basic int, string, double types */
if (type <= G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_GLIB_LAST)) {
return TRUE;
}
/* our fundamental types that are certainly not fixed */
if (type == GST_TYPE_INT_RANGE || type == GST_TYPE_DOUBLE_RANGE ||
type == GST_TYPE_INT64_RANGE ||
type == GST_TYPE_LIST || type == GST_TYPE_FRACTION_RANGE ||
type == GST_TYPE_STRUCTURE) {
return FALSE;
}
/* other (boxed) types that are fixed */
if (type == GST_TYPE_BUFFER) {
return TRUE;
}
/* heavy checks */
if (G_TYPE_IS_FUNDAMENTAL (type) || G_TYPE_FUNDAMENTAL (type) <=
G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_GLIB_LAST)) {
return TRUE;
}
return FALSE;
}
/* GValue functions usable for both regular lists and arrays */
static void
gst_value_init_list_or_array (GValue * value)
{
value->data[0].v_pointer = _gst_value_list_new (0);
}
static GstValueList *
copy_gst_value_list (const GstValueList * src)
{
GstValueList *dest;
guint i, len;
len = src->len;
dest = _gst_value_list_new (len);
dest->len = len;
for (i = 0; i < len; i++) {
gst_value_init_and_copy (&dest->fields[i], &src->fields[i]);
}
return dest;
}
static void
gst_value_copy_list_or_array (const GValue * src_value, GValue * dest_value)
{
dest_value->data[0].v_pointer =
copy_gst_value_list (VALUE_LIST_ARRAY (src_value));
}
static void
gst_value_free_list_or_array (GValue * value)
{
guint i, len;
GstValueList *src = VALUE_LIST_ARRAY (value);
len = src->len;
if ((value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS) == 0) {
for (i = 0; i < len; i++) {
g_value_unset (&src->fields[i]);
}
if (VALUE_LIST_IS_USING_DYNAMIC_ARRAY (src)) {
g_free (src->fields);
}
g_free (src);
}
}
static gpointer
gst_value_list_or_array_peek_pointer (const GValue * value)
{
return value->data[0].v_pointer;
}
static gchar *
gst_value_collect_list_or_array (GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
if (collect_flags & G_VALUE_NOCOPY_CONTENTS) {
value->data[0].v_pointer = collect_values[0].v_pointer;
value->data[1].v_uint = G_VALUE_NOCOPY_CONTENTS;
} else {
value->data[0].v_pointer =
copy_gst_value_list ((GstValueList *) collect_values[0].v_pointer);
}
return NULL;
}
static gchar *
gst_value_lcopy_list_or_array (const GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
GstValueList **dest = collect_values[0].v_pointer;
if (!dest)
return g_strdup_printf ("value location for `%s' passed as NULL",
G_VALUE_TYPE_NAME (value));
if (!value->data[0].v_pointer)
return g_strdup_printf ("invalid value given for `%s'",
G_VALUE_TYPE_NAME (value));
if (collect_flags & G_VALUE_NOCOPY_CONTENTS) {
*dest = (GstValueList *) value->data[0].v_pointer;
} else {
*dest = copy_gst_value_list (VALUE_LIST_ARRAY (value));
}
return NULL;
}
static gboolean
gst_value_list_or_array_get_basic_type (const GValue * value, GType * type)
{
if (G_UNLIKELY (value == NULL))
return FALSE;
if (GST_VALUE_HOLDS_LIST (value) || GST_VALUE_HOLDS_ARRAY (value)) {
if (VALUE_LIST_SIZE (value) == 0)
return FALSE;
return gst_value_list_or_array_get_basic_type (VALUE_LIST_GET_VALUE (value,
0), type);
}
*type = G_VALUE_TYPE (value);
return TRUE;
}
#define IS_RANGE_COMPAT(type1,type2,t1,t2) \
(((t1) == (type1) && (t2) == (type2)) || ((t2) == (type1) && (t1) == (type2)))
static gboolean
gst_value_list_or_array_are_compatible (const GValue * value1,
const GValue * value2)
{
GType basic_type1, basic_type2;
/* empty or same type is OK */
if (!gst_value_list_or_array_get_basic_type (value1, &basic_type1) ||
!gst_value_list_or_array_get_basic_type (value2, &basic_type2) ||
basic_type1 == basic_type2)
return TRUE;
/* ranges are distinct types for each bound type... */
if (IS_RANGE_COMPAT (G_TYPE_INT, GST_TYPE_INT_RANGE, basic_type1,
basic_type2))
return TRUE;
if (IS_RANGE_COMPAT (G_TYPE_INT64, GST_TYPE_INT64_RANGE, basic_type1,
basic_type2))
return TRUE;
if (IS_RANGE_COMPAT (G_TYPE_DOUBLE, GST_TYPE_DOUBLE_RANGE, basic_type1,
basic_type2))
return TRUE;
if (IS_RANGE_COMPAT (GST_TYPE_FRACTION, GST_TYPE_FRACTION_RANGE, basic_type1,
basic_type2))
return TRUE;
return FALSE;
}
static inline void
_gst_value_list_append_and_take_value (GValue * value, GValue * append_value)
{
_gst_value_list_append_val (VALUE_LIST_ARRAY (value), append_value);
memset (append_value, 0, sizeof (GValue));
}
/**
* gst_value_list_append_and_take_value:
* @value: a #GValue of type #GST_TYPE_LIST
* @append_value: (transfer full): the value to append
*
* Appends @append_value to the GstValueList in @value.
*
* Since: 1.2
*/
void
gst_value_list_append_and_take_value (GValue * value, GValue * append_value)
{
g_return_if_fail (GST_VALUE_HOLDS_LIST (value));
g_return_if_fail (G_IS_VALUE (append_value));
g_return_if_fail (gst_value_list_or_array_are_compatible (value,
append_value));
_gst_value_list_append_and_take_value (value, append_value);
}
/**
* gst_value_list_append_value:
* @value: a #GValue of type #GST_TYPE_LIST
* @append_value: (transfer none): the value to append
*
* Appends @append_value to the GstValueList in @value.
*/
void
gst_value_list_append_value (GValue * value, const GValue * append_value)
{
GValue val = { 0, };
g_return_if_fail (GST_VALUE_HOLDS_LIST (value));
g_return_if_fail (G_IS_VALUE (append_value));
g_return_if_fail (gst_value_list_or_array_are_compatible (value,
append_value));
gst_value_init_and_copy (&val, append_value);
_gst_value_list_append_val (VALUE_LIST_ARRAY (value), &val);
}
/**
* gst_value_list_prepend_value:
* @value: a #GValue of type #GST_TYPE_LIST
* @prepend_value: the value to prepend
*
* Prepends @prepend_value to the GstValueList in @value.
*/
void
gst_value_list_prepend_value (GValue * value, const GValue * prepend_value)
{
GValue val = { 0, };
g_return_if_fail (GST_VALUE_HOLDS_LIST (value));
g_return_if_fail (G_IS_VALUE (prepend_value));
g_return_if_fail (gst_value_list_or_array_are_compatible (value,
prepend_value));
gst_value_init_and_copy (&val, prepend_value);
_gst_value_list_prepend_val (VALUE_LIST_ARRAY (value), &val);
}
/**
* gst_value_list_concat:
* @dest: (out caller-allocates): an uninitialized #GValue to take the result
* @value1: a #GValue
* @value2: a #GValue
*
* Concatenates copies of @value1 and @value2 into a list. Values that are not
* of type #GST_TYPE_LIST are treated as if they were lists of length 1.
* @dest will be initialized to the type #GST_TYPE_LIST.
*/
void
gst_value_list_concat (GValue * dest, const GValue * value1,
const GValue * value2)
{
guint i, value1_length, value2_length;
GstValueList *vlist;
g_return_if_fail (dest != NULL);
g_return_if_fail (G_VALUE_TYPE (dest) == 0);
g_return_if_fail (G_IS_VALUE (value1));
g_return_if_fail (G_IS_VALUE (value2));
g_return_if_fail (gst_value_list_or_array_are_compatible (value1, value2));
value1_length =
(GST_VALUE_HOLDS_LIST (value1) ? VALUE_LIST_SIZE (value1) : 1);
value2_length =
(GST_VALUE_HOLDS_LIST (value2) ? VALUE_LIST_SIZE (value2) : 1);
_gst_value_list_init (dest, value1_length + value2_length);
vlist = VALUE_LIST_ARRAY (dest);
vlist->len = value1_length + value2_length;
if (GST_VALUE_HOLDS_LIST (value1)) {
for (i = 0; i < value1_length; i++) {
gst_value_init_and_copy (&vlist->fields[i],
VALUE_LIST_GET_VALUE (value1, i));
}
} else {
gst_value_init_and_copy (&vlist->fields[0], value1);
}
if (GST_VALUE_HOLDS_LIST (value2)) {
for (i = 0; i < value2_length; i++) {
gst_value_init_and_copy (&vlist->fields[i + value1_length],
VALUE_LIST_GET_VALUE (value2, i));
}
} else {
gst_value_init_and_copy (&vlist->fields[value1_length], value2);
}
}
/* same as gst_value_list_concat() but takes ownership of GValues */
static void
gst_value_list_concat_and_take_values (GValue * dest, GValue * val1,
GValue * val2)
{
guint i, val1_length, val2_length;
gboolean val1_is_list;
gboolean val2_is_list;
GstValueList *vlist;
g_assert (dest != NULL);
g_assert (G_VALUE_TYPE (dest) == 0);
g_assert (G_IS_VALUE (val1));
g_assert (G_IS_VALUE (val2));
g_assert (gst_value_list_or_array_are_compatible (val1, val2));
val1_is_list = GST_VALUE_HOLDS_LIST (val1);
val1_length = (val1_is_list ? VALUE_LIST_SIZE (val1) : 1);
val2_is_list = GST_VALUE_HOLDS_LIST (val2);
val2_length = (val2_is_list ? VALUE_LIST_SIZE (val2) : 1);
/* Overidding the default initialization to have a list of the target size */
_gst_value_list_init (dest, val1_length + val2_length);
vlist = VALUE_LIST_ARRAY (dest);
vlist->len = val1_length + val2_length;
if (val1_is_list) {
for (i = 0; i < val1_length; i++) {
vlist->fields[i] = *VALUE_LIST_GET_VALUE (val1, i);
}
VALUE_LIST_ARRAY (val1)->len = 0;
g_value_unset (val1);
} else {
vlist->fields[0] = *val1;
G_VALUE_TYPE (val1) = G_TYPE_INVALID;
}
if (val2_is_list) {
for (i = 0; i < val2_length; i++) {
const GValue *v2 = VALUE_LIST_GET_VALUE (val2, i);
vlist->fields[i + val1_length] = *v2;
}
VALUE_LIST_ARRAY (val2)->len = 0;
g_value_unset (val2);
} else {
vlist->fields[val1_length] = *val2;
G_VALUE_TYPE (val2) = G_TYPE_INVALID;
}
}
/**
* gst_value_list_merge:
* @dest: (out caller-allocates): an uninitialized #GValue to take the result
* @value1: a #GValue
* @value2: a #GValue
*
* Merges copies of @value1 and @value2. Values that are not
* of type #GST_TYPE_LIST are treated as if they were lists of length 1.
*
* The result will be put into @dest and will either be a list that will not
* contain any duplicates, or a non-list type (if @value1 and @value2
* were equal).
*/
void
gst_value_list_merge (GValue * dest, const GValue * value1,
const GValue * value2)
{
guint i, j, k, value1_length, value2_length, skipped;
const GValue *src;
gboolean skip;
GstValueList *vlist;
g_return_if_fail (dest != NULL);
g_return_if_fail (G_VALUE_TYPE (dest) == 0);
g_return_if_fail (G_IS_VALUE (value1));
g_return_if_fail (G_IS_VALUE (value2));
g_return_if_fail (gst_value_list_or_array_are_compatible (value1, value2));
value1_length =
(GST_VALUE_HOLDS_LIST (value1) ? VALUE_LIST_SIZE (value1) : 1);
value2_length =
(GST_VALUE_HOLDS_LIST (value2) ? VALUE_LIST_SIZE (value2) : 1);
_gst_value_list_init (dest, value1_length + value2_length);
vlist = VALUE_LIST_ARRAY (dest);
vlist->len = value1_length + value2_length;
if (GST_VALUE_HOLDS_LIST (value1)) {
for (i = 0; i < value1_length; i++) {
gst_value_init_and_copy (&vlist->fields[i], VALUE_LIST_GET_VALUE (value1,
i));
}
} else {
gst_value_init_and_copy (&vlist->fields[0], value1);
}
j = value1_length;
skipped = 0;
if (GST_VALUE_HOLDS_LIST (value2)) {
for (i = 0; i < value2_length; i++) {
skip = FALSE;
src = VALUE_LIST_GET_VALUE (value2, i);
for (k = 0; k < value1_length; k++) {
if (gst_value_compare (&vlist->fields[k], src) == GST_VALUE_EQUAL) {
skip = TRUE;
skipped++;
break;
}
}
if (!skip) {
gst_value_init_and_copy (&vlist->fields[j], src);
j++;
}
}
} else {
skip = FALSE;
for (k = 0; k < value1_length; k++) {
if (gst_value_compare (&vlist->fields[k], value2) == GST_VALUE_EQUAL) {
skip = TRUE;
skipped++;
break;
}
}
if (!skip) {
gst_value_init_and_copy (&vlist->fields[j], value2);
}
}
if (skipped) {
guint new_size = value1_length + (value2_length - skipped);
if (new_size > 1) {
/* shrink list */
vlist->len = new_size;
} else {
GValue single_dest;
/* size is 1, take single value in list and make it new dest */
single_dest = vlist->fields[0];
/* clean up old value allocations: must set array size to 0, because
* allocated values are not inited meaning g_value_unset() will not
* work on them */
vlist->len = 0;
g_value_unset (dest);
/* the single value is our new result */
*dest = single_dest;
}
}
}
/**
* gst_value_list_get_size:
* @value: a #GValue of type #GST_TYPE_LIST
*
* Gets the number of values contained in @value.
*
* Returns: the number of values
*/
guint
gst_value_list_get_size (const GValue * value)
{
g_return_val_if_fail (GST_VALUE_HOLDS_LIST (value), 0);
return VALUE_LIST_SIZE (value);
}
/**
* gst_value_list_get_value:
* @value: a #GValue of type #GST_TYPE_LIST
* @index: index of value to get from the list
*
* Gets the value that is a member of the list contained in @value and
* has the index @index.
*
* Returns: (transfer none): the value at the given index
*/
const GValue *
gst_value_list_get_value (const GValue * value, guint index)
{
g_return_val_if_fail (GST_VALUE_HOLDS_LIST (value), NULL);
g_return_val_if_fail (index < VALUE_LIST_SIZE (value), NULL);
return VALUE_LIST_GET_VALUE (value, index);
}
/**
* gst_value_array_append_value:
* @value: a #GValue of type #GST_TYPE_ARRAY
* @append_value: the value to append
*
* Appends @append_value to the GstValueArray in @value.
*/
void
gst_value_array_append_value (GValue * value, const GValue * append_value)
{
GValue val = { 0, };
g_return_if_fail (GST_VALUE_HOLDS_ARRAY (value));
g_return_if_fail (G_IS_VALUE (append_value));
g_return_if_fail (gst_value_list_or_array_are_compatible (value,
append_value));
gst_value_init_and_copy (&val, append_value);
_gst_value_list_append_val (VALUE_LIST_ARRAY (value), &val);
}
static inline void
_gst_value_array_append_and_take_value (GValue * value, GValue * append_value)
{
_gst_value_list_append_val (VALUE_LIST_ARRAY (value), append_value);
memset (append_value, 0, sizeof (GValue));
}
/**
* gst_value_array_append_and_take_value:
* @value: a #GValue of type #GST_TYPE_ARRAY
* @append_value: (transfer full): the value to append
*
* Appends @append_value to the GstValueArray in @value.
*
* Since: 1.2
*/
void
gst_value_array_append_and_take_value (GValue * value, GValue * append_value)
{
g_return_if_fail (GST_VALUE_HOLDS_ARRAY (value));
g_return_if_fail (G_IS_VALUE (append_value));
g_return_if_fail (gst_value_list_or_array_are_compatible (value,
append_value));
_gst_value_array_append_and_take_value (value, append_value);
}
/**
* gst_value_array_prepend_value:
* @value: a #GValue of type #GST_TYPE_ARRAY
* @prepend_value: the value to prepend
*
* Prepends @prepend_value to the GstValueArray in @value.
*/
void
gst_value_array_prepend_value (GValue * value, const GValue * prepend_value)
{
GValue val = { 0, };
g_return_if_fail (GST_VALUE_HOLDS_ARRAY (value));
g_return_if_fail (G_IS_VALUE (prepend_value));
g_return_if_fail (gst_value_list_or_array_are_compatible (value,
prepend_value));
gst_value_init_and_copy (&val, prepend_value);
_gst_value_list_prepend_val (VALUE_LIST_ARRAY (value), &val);
}
/**
* gst_value_array_get_size:
* @value: a #GValue of type #GST_TYPE_ARRAY
*
* Gets the number of values contained in @value.
*
* Returns: the number of values
*/
guint
gst_value_array_get_size (const GValue * value)
{
g_return_val_if_fail (GST_VALUE_HOLDS_ARRAY (value), 0);
return VALUE_LIST_SIZE (value);
}
/**
* gst_value_array_get_value:
* @value: a #GValue of type #GST_TYPE_ARRAY
* @index: index of value to get from the array
*
* Gets the value that is a member of the array contained in @value and
* has the index @index.
*
* Returns: (transfer none): the value at the given index
*/
const GValue *
gst_value_array_get_value (const GValue * value, guint index)
{
g_return_val_if_fail (GST_VALUE_HOLDS_ARRAY (value), NULL);
g_return_val_if_fail (index < VALUE_LIST_SIZE (value), NULL);
return VALUE_LIST_GET_VALUE (value, index);
}
static void
gst_value_transform_list_string (const GValue * src_value, GValue * dest_value)
{
gst_value_transform_any_list_string (src_value, dest_value, "{ ", " }");
}
static void
gst_value_transform_array_string (const GValue * src_value, GValue * dest_value)
{
gst_value_transform_any_list_string (src_value, dest_value, "< ", " >");
}
static void
gst_value_transform_g_value_array_string (const GValue * src_value,
GValue * dest_value)
{
_gst_value_transform_g_value_array_string (src_value, dest_value, "< ", " >");
}
static void
gst_value_transform_g_value_array_any_list (const GValue * src_value,
GValue * dest_value)
{
const GValueArray *varray;
GstValueList *vlist;
gint i;
varray = g_value_get_boxed (src_value);
/* GLib will unset the value, memset to 0 the data instead of doing a proper
* reset. That's why we need to allocate the array here */
vlist = dest_value->data[0].v_pointer =
_gst_value_list_new (varray->n_values);
for (i = 0; i < varray->n_values; i++) {
GValue val = G_VALUE_INIT;
gst_value_init_and_copy (&val, &varray->values[i]);
_gst_value_list_append_val (vlist, &val);
}
}
static void
gst_value_transform_any_list_g_value_array (const GValue * src_value,
GValue * dest_value)
{
GValueArray *varray;
GstValueList *vlist;
gint i;
vlist = VALUE_LIST_ARRAY (src_value);
varray = g_value_array_new (vlist->len);
for (i = 0; i < vlist->len; i++)
g_value_array_append (varray, &vlist->fields[i]);
g_value_take_boxed (dest_value, varray);
}
/* Do an unordered compare of the contents of a list */
static gint
gst_value_compare_value_list (const GValue * value1, const GValue * value2)
{
guint i, j;
GstValueList *vlist1 = VALUE_LIST_ARRAY (value1);
GstValueList *vlist2 = VALUE_LIST_ARRAY (value2);
GValue *v1;
GValue *v2;
gint len, to_remove;
guint8 *removed;
GstValueCompareFunc compare;
/* get length and do initial length check. */
len = vlist1->len;
if (len != vlist2->len)
return GST_VALUE_UNORDERED;
/* place to mark removed value indices of array2 */
removed = g_newa (guint8, len);
memset (removed, 0, len);
to_remove = len;
/* loop over array1, all items should be in array2. When we find an
* item in array2, remove it from array2 by marking it as removed */
for (i = 0; i < len; i++) {
v1 = &vlist1->fields[i];
if ((compare = gst_value_get_compare_func (v1))) {
for (j = 0; j < len; j++) {
/* item is removed, we can skip it */
if (removed[j])
continue;
v2 = &vlist2->fields[j];
if (gst_value_compare_with_func (v1, v2, compare) == GST_VALUE_EQUAL) {
/* mark item as removed now that we found it in array2 and
* decrement the number of remaining items in array2. */
removed[j] = 1;
to_remove--;
break;
}
}
/* item in array1 and not in array2, UNORDERED */
if (j == len)
return GST_VALUE_UNORDERED;
} else
return GST_VALUE_UNORDERED;
}
/* if not all items were removed, array2 contained something not in array1 */
if (to_remove != 0)
return GST_VALUE_UNORDERED;
/* arrays are equal */
return GST_VALUE_EQUAL;
}
/* Perform an ordered comparison of the contents of an array */
static gint
gst_value_compare_value_array (const GValue * value1, const GValue * value2)
{
guint i;
GstValueList *vlist1 = VALUE_LIST_ARRAY (value1);
GstValueList *vlist2 = VALUE_LIST_ARRAY (value2);
guint len = vlist1->len;
GValue *v1;
GValue *v2;
if (len != vlist2->len)
return GST_VALUE_UNORDERED;
for (i = 0; i < len; i++) {
v1 = &vlist1->fields[i];
v2 = &vlist2->fields[i];
if (gst_value_compare (v1, v2) != GST_VALUE_EQUAL)
return GST_VALUE_UNORDERED;
}
return GST_VALUE_EQUAL;
}
static gint
gst_value_compare_g_value_array (const GValue * value1, const GValue * value2)
{
guint i;
GValueArray *array1 = value1->data[0].v_pointer;
GValueArray *array2 = value2->data[0].v_pointer;
guint len = array1 ? array1->n_values : 0;
GValue *v1;
GValue *v2;
if (len != (array2 ? array2->n_values : 0))
return GST_VALUE_UNORDERED;
for (i = 0; i < len; i++) {
v1 = g_value_array_get_nth (array1, i);
v2 = g_value_array_get_nth (array2, i);
if (gst_value_compare (v1, v2) != GST_VALUE_EQUAL)
return GST_VALUE_UNORDERED;
}
return GST_VALUE_EQUAL;
}
static gchar *
gst_value_serialize_value_list (const GValue * value)
{
return _priv_gst_value_serialize_any_list (value, "{ ", " }", TRUE);
}
static gboolean
gst_value_deserialize_value_list (GValue * dest, const gchar * s)
{
gchar *s2 = (gchar *) s;
return _priv_gst_value_parse_list (s2, &s2, dest, G_TYPE_INVALID);
}
static gchar *
gst_value_serialize_value_array (const GValue * value)
{
return _priv_gst_value_serialize_any_list (value, "< ", " >", TRUE);
}
static gboolean
gst_value_deserialize_value_array (GValue * dest, const gchar * s)
{
gchar *s2 = (gchar *) s;
return _priv_gst_value_parse_array (s2, &s2, dest, G_TYPE_INVALID);
}
static gchar *
gst_value_serialize_g_value_array (const GValue * value)
{
return _gst_value_serialize_g_value_array (value, "< ", " >");
}
static gboolean
gst_value_deserialize_g_value_array (GValue * dest, const gchar * s)
{
g_warning ("gst_value_deserialize_g_value_array: unimplemented");
return FALSE;
}
/*************
* int range *
*
* Values in the range are defined as any value greater or equal
* to min*step, AND lesser or equal to max*step.
* For step == 1, this falls back to the traditional range semantics.
*
* data[0] = (min << 32) | (max)
* data[1] = step
*
*************/
#define INT_RANGE_MIN(v) ((gint) (((v)->data[0].v_uint64) >> 32))
#define INT_RANGE_MAX(v) ((gint) (((v)->data[0].v_uint64) & 0xffffffff))
#define INT_RANGE_STEP(v) ((v)->data[1].v_int)
static void
gst_value_init_int_range (GValue * value)
{
G_STATIC_ASSERT (sizeof (gint) <= 2 * sizeof (guint64));
value->data[0].v_uint64 = 0;
value->data[1].v_int = 1;
}
static void
gst_value_copy_int_range (const GValue * src_value, GValue * dest_value)
{
dest_value->data[0].v_uint64 = src_value->data[0].v_uint64;
dest_value->data[1].v_int = src_value->data[1].v_int;
}
static gchar *
gst_value_collect_int_range (GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
if (n_collect_values != 2)
return g_strdup_printf ("not enough value locations for `%s' passed",
G_VALUE_TYPE_NAME (value));
if (collect_values[0].v_int >= collect_values[1].v_int)
return g_strdup_printf ("range start is not smaller than end for `%s'",
G_VALUE_TYPE_NAME (value));
gst_value_set_int_range_step (value, collect_values[0].v_int,
collect_values[1].v_int, 1);
return NULL;
}
static gchar *
gst_value_lcopy_int_range (const GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
guint32 *int_range_start = collect_values[0].v_pointer;
guint32 *int_range_end = collect_values[1].v_pointer;
if (!int_range_start)
return g_strdup_printf ("start value location for `%s' passed as NULL",
G_VALUE_TYPE_NAME (value));
if (!int_range_end)
return g_strdup_printf ("end value location for `%s' passed as NULL",
G_VALUE_TYPE_NAME (value));
*int_range_start = INT_RANGE_MIN (value);
*int_range_end = INT_RANGE_MAX (value);
return NULL;
}
/**
* gst_value_set_int_range_step:
* @value: a GValue initialized to GST_TYPE_INT_RANGE
* @start: the start of the range
* @end: the end of the range
* @step: the step of the range
*
* Sets @value to the range specified by @start, @end and @step.
*/
void
gst_value_set_int_range_step (GValue * value, gint start, gint end, gint step)
{
guint64 sstart, sstop;
g_return_if_fail (GST_VALUE_HOLDS_INT_RANGE (value));
g_return_if_fail (start < end);
g_return_if_fail (step > 0);
g_return_if_fail (start % step == 0);
g_return_if_fail (end % step == 0);
sstart = (guint) (start / step);
sstop = (guint) (end / step);
value->data[0].v_uint64 = (sstart << 32) | sstop;
value->data[1].v_int = step;
}
/**
* gst_value_set_int_range:
* @value: a GValue initialized to GST_TYPE_INT_RANGE
* @start: the start of the range
* @end: the end of the range
*
* Sets @value to the range specified by @start and @end.
*/
void
gst_value_set_int_range (GValue * value, gint start, gint end)
{
gst_value_set_int_range_step (value, start, end, 1);
}
/**
* gst_value_get_int_range_min:
* @value: a GValue initialized to GST_TYPE_INT_RANGE
*
* Gets the minimum of the range specified by @value.
*
* Returns: the minimum of the range
*/
gint
gst_value_get_int_range_min (const GValue * value)
{
g_return_val_if_fail (GST_VALUE_HOLDS_INT_RANGE (value), 0);
return INT_RANGE_MIN (value) * INT_RANGE_STEP (value);
}
/**
* gst_value_get_int_range_max:
* @value: a GValue initialized to GST_TYPE_INT_RANGE
*
* Gets the maximum of the range specified by @value.
*
* Returns: the maximum of the range
*/
gint
gst_value_get_int_range_max (const GValue * value)
{
g_return_val_if_fail (GST_VALUE_HOLDS_INT_RANGE (value), 0);
return INT_RANGE_MAX (value) * INT_RANGE_STEP (value);
}
/**
* gst_value_get_int_range_step:
* @value: a GValue initialized to GST_TYPE_INT_RANGE
*
* Gets the step of the range specified by @value.
*
* Returns: the step of the range
*/
gint
gst_value_get_int_range_step (const GValue * value)
{
g_return_val_if_fail (GST_VALUE_HOLDS_INT_RANGE (value), 0);
return INT_RANGE_STEP (value);
}
static void
gst_value_transform_int_range_string (const GValue * src_value,
GValue * dest_value)
{
if (INT_RANGE_STEP (src_value) == 1)
dest_value->data[0].v_pointer = g_strdup_printf ("[%d,%d]",
INT_RANGE_MIN (src_value), INT_RANGE_MAX (src_value));
else
dest_value->data[0].v_pointer = g_strdup_printf ("[%d,%d,%d]",
INT_RANGE_MIN (src_value) * INT_RANGE_STEP (src_value),
INT_RANGE_MAX (src_value) * INT_RANGE_STEP (src_value),
INT_RANGE_STEP (src_value));
}
static gint
gst_value_compare_int_range (const GValue * value1, const GValue * value2)
{
/* calculate the number of values in each range */
gint n1 = INT_RANGE_MAX (value1) - INT_RANGE_MIN (value1) + 1;
gint n2 = INT_RANGE_MAX (value2) - INT_RANGE_MIN (value2) + 1;
/* they must be equal */
if (n1 != n2)
return GST_VALUE_UNORDERED;
/* if empty, equal */
if (n1 == 0)
return GST_VALUE_EQUAL;
/* if more than one value, then it is only equal if the step is equal
and bounds lie on the same value */
if (n1 > 1) {
if (INT_RANGE_STEP (value1) == INT_RANGE_STEP (value2) &&
INT_RANGE_MIN (value1) == INT_RANGE_MIN (value2) &&
INT_RANGE_MAX (value1) == INT_RANGE_MAX (value2)) {
return GST_VALUE_EQUAL;
}
return GST_VALUE_UNORDERED;
} else {
/* if just one, only if the value is equal */
if (INT_RANGE_MIN (value1) == INT_RANGE_MIN (value2))
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
}
static gchar *
gst_value_serialize_int_range (const GValue * value)
{
if (INT_RANGE_STEP (value) == 1)
return g_strdup_printf ("[ %d, %d ]", INT_RANGE_MIN (value),
INT_RANGE_MAX (value));
else
return g_strdup_printf ("[ %d, %d, %d ]",
INT_RANGE_MIN (value) * INT_RANGE_STEP (value),
INT_RANGE_MAX (value) * INT_RANGE_STEP (value), INT_RANGE_STEP (value));
}
static gboolean
gst_value_deserialize_int_range (GValue * dest, const gchar * s)
{
g_warning ("unimplemented");
return FALSE;
}
/***************
* int64 range *
*
* Values in the range are defined as any value greater or equal
* to min*step, AND lesser or equal to max*step.
* For step == 1, this falls back to the traditional range semantics.
***************/
#define INT64_RANGE_MIN(v) (((gint64 *)((v)->data[0].v_pointer))[0])
#define INT64_RANGE_MAX(v) (((gint64 *)((v)->data[0].v_pointer))[1])
#define INT64_RANGE_STEP(v) (((gint64 *)((v)->data[0].v_pointer))[2])
static void
gst_value_init_int64_range (GValue * value)
{
gint64 *vals = g_slice_alloc0 (3 * sizeof (gint64));
value->data[0].v_pointer = vals;
INT64_RANGE_MIN (value) = 0;
INT64_RANGE_MAX (value) = 0;
INT64_RANGE_STEP (value) = 1;
}
static void
gst_value_free_int64_range (GValue * value)
{
g_return_if_fail (GST_VALUE_HOLDS_INT64_RANGE (value));
g_slice_free1 (3 * sizeof (gint64), value->data[0].v_pointer);
value->data[0].v_pointer = NULL;
}
static void
gst_value_copy_int64_range (const GValue * src_value, GValue * dest_value)
{
gint64 *vals = (gint64 *) dest_value->data[0].v_pointer;
gint64 *src_vals = (gint64 *) src_value->data[0].v_pointer;
if (vals == NULL) {
gst_value_init_int64_range (dest_value);
}
if (src_vals != NULL) {
INT64_RANGE_MIN (dest_value) = INT64_RANGE_MIN (src_value);
INT64_RANGE_MAX (dest_value) = INT64_RANGE_MAX (src_value);
INT64_RANGE_STEP (dest_value) = INT64_RANGE_STEP (src_value);
}
}
static gchar *
gst_value_collect_int64_range (GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
gint64 *vals = value->data[0].v_pointer;
if (n_collect_values != 2)
return g_strdup_printf ("not enough value locations for `%s' passed",
G_VALUE_TYPE_NAME (value));
if (collect_values[0].v_int64 >= collect_values[1].v_int64)
return g_strdup_printf ("range start is not smaller than end for `%s'",
G_VALUE_TYPE_NAME (value));
if (vals == NULL) {
gst_value_init_int64_range (value);
}
gst_value_set_int64_range_step (value, collect_values[0].v_int64,
collect_values[1].v_int64, 1);
return NULL;
}
static gchar *
gst_value_lcopy_int64_range (const GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
guint64 *int_range_start = collect_values[0].v_pointer;
guint64 *int_range_end = collect_values[1].v_pointer;
guint64 *int_range_step = collect_values[2].v_pointer;
gint64 *vals = (gint64 *) value->data[0].v_pointer;
if (!int_range_start)
return g_strdup_printf ("start value location for `%s' passed as NULL",
G_VALUE_TYPE_NAME (value));
if (!int_range_end)
return g_strdup_printf ("end value location for `%s' passed as NULL",
G_VALUE_TYPE_NAME (value));
if (!int_range_step)
return g_strdup_printf ("step value location for `%s' passed as NULL",
G_VALUE_TYPE_NAME (value));
if (G_UNLIKELY (vals == NULL)) {
return g_strdup_printf ("Uninitialised `%s' passed",
G_VALUE_TYPE_NAME (value));
}
*int_range_start = INT64_RANGE_MIN (value);
*int_range_end = INT64_RANGE_MAX (value);
*int_range_step = INT64_RANGE_STEP (value);
return NULL;
}
/**
* gst_value_set_int64_range_step:
* @value: a GValue initialized to GST_TYPE_INT64_RANGE
* @start: the start of the range
* @end: the end of the range
* @step: the step of the range
*
* Sets @value to the range specified by @start, @end and @step.
*/
void
gst_value_set_int64_range_step (GValue * value, gint64 start, gint64 end,
gint64 step)
{
g_return_if_fail (GST_VALUE_HOLDS_INT64_RANGE (value));
g_return_if_fail (start < end);
g_return_if_fail (step > 0);
g_return_if_fail (start % step == 0);
g_return_if_fail (end % step == 0);
INT64_RANGE_MIN (value) = start / step;
INT64_RANGE_MAX (value) = end / step;
INT64_RANGE_STEP (value) = step;
}
/**
* gst_value_set_int64_range:
* @value: a GValue initialized to GST_TYPE_INT64_RANGE
* @start: the start of the range
* @end: the end of the range
*
* Sets @value to the range specified by @start and @end.
*/
void
gst_value_set_int64_range (GValue * value, gint64 start, gint64 end)
{
gst_value_set_int64_range_step (value, start, end, 1);
}
/**
* gst_value_get_int64_range_min:
* @value: a GValue initialized to GST_TYPE_INT64_RANGE
*
* Gets the minimum of the range specified by @value.
*
* Returns: the minimum of the range
*/
gint64
gst_value_get_int64_range_min (const GValue * value)
{
g_return_val_if_fail (GST_VALUE_HOLDS_INT64_RANGE (value), 0);
return INT64_RANGE_MIN (value) * INT64_RANGE_STEP (value);
}
/**
* gst_value_get_int64_range_max:
* @value: a GValue initialized to GST_TYPE_INT64_RANGE
*
* Gets the maximum of the range specified by @value.
*
* Returns: the maximum of the range
*/
gint64
gst_value_get_int64_range_max (const GValue * value)
{
g_return_val_if_fail (GST_VALUE_HOLDS_INT64_RANGE (value), 0);
return INT64_RANGE_MAX (value) * INT64_RANGE_STEP (value);
}
/**
* gst_value_get_int64_range_step:
* @value: a GValue initialized to GST_TYPE_INT64_RANGE
*
* Gets the step of the range specified by @value.
*
* Returns: the step of the range
*/
gint64
gst_value_get_int64_range_step (const GValue * value)
{
g_return_val_if_fail (GST_VALUE_HOLDS_INT64_RANGE (value), 0);
return INT64_RANGE_STEP (value);
}
static void
gst_value_transform_int64_range_string (const GValue * src_value,
GValue * dest_value)
{
if (INT64_RANGE_STEP (src_value) == 1)
dest_value->data[0].v_pointer =
g_strdup_printf ("(gint64)[%" G_GINT64_FORMAT ",%" G_GINT64_FORMAT "]",
INT64_RANGE_MIN (src_value), INT64_RANGE_MAX (src_value));
else
dest_value->data[0].v_pointer =
g_strdup_printf ("(gint64)[%" G_GINT64_FORMAT ",%" G_GINT64_FORMAT
",%" G_GINT64_FORMAT "]",
INT64_RANGE_MIN (src_value) * INT64_RANGE_STEP (src_value),
INT64_RANGE_MAX (src_value) * INT64_RANGE_STEP (src_value),
INT64_RANGE_STEP (src_value));
}
static gint
gst_value_compare_int64_range (const GValue * value1, const GValue * value2)
{
/* calculate the number of values in each range */
gint64 n1 = INT64_RANGE_MAX (value1) - INT64_RANGE_MIN (value1) + 1;
gint64 n2 = INT64_RANGE_MAX (value2) - INT64_RANGE_MIN (value2) + 1;
/* they must be equal */
if (n1 != n2)
return GST_VALUE_UNORDERED;
/* if empty, equal */
if (n1 == 0)
return GST_VALUE_EQUAL;
/* if more than one value, then it is only equal if the step is equal
and bounds lie on the same value */
if (n1 > 1) {
if (INT64_RANGE_STEP (value1) == INT64_RANGE_STEP (value2) &&
INT64_RANGE_MIN (value1) == INT64_RANGE_MIN (value2) &&
INT64_RANGE_MAX (value1) == INT64_RANGE_MAX (value2)) {
return GST_VALUE_EQUAL;
}
return GST_VALUE_UNORDERED;
} else {
/* if just one, only if the value is equal */
if (INT64_RANGE_MIN (value1) == INT64_RANGE_MIN (value2))
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
}
static gchar *
gst_value_serialize_int64_range (const GValue * value)
{
if (INT64_RANGE_STEP (value) == 1)
return g_strdup_printf ("[ %" G_GINT64_FORMAT ", %" G_GINT64_FORMAT " ]",
INT64_RANGE_MIN (value), INT64_RANGE_MAX (value));
else
return g_strdup_printf ("[ %" G_GINT64_FORMAT ", %" G_GINT64_FORMAT ", %"
G_GINT64_FORMAT " ]",
INT64_RANGE_MIN (value) * INT64_RANGE_STEP (value),
INT64_RANGE_MAX (value) * INT64_RANGE_STEP (value),
INT64_RANGE_STEP (value));
}
static gboolean
gst_value_deserialize_int64_range (GValue * dest, const gchar * s)
{
g_warning ("unimplemented");
return FALSE;
}
/****************
* double range *
****************/
static void
gst_value_init_double_range (GValue * value)
{
value->data[0].v_double = 0;
value->data[1].v_double = 0;
}
static void
gst_value_copy_double_range (const GValue * src_value, GValue * dest_value)
{
dest_value->data[0].v_double = src_value->data[0].v_double;
dest_value->data[1].v_double = src_value->data[1].v_double;
}
static gchar *
gst_value_collect_double_range (GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
if (n_collect_values != 2)
return g_strdup_printf ("not enough value locations for `%s' passed",
G_VALUE_TYPE_NAME (value));
if (collect_values[0].v_double >= collect_values[1].v_double)
return g_strdup_printf ("range start is not smaller than end for `%s'",
G_VALUE_TYPE_NAME (value));
value->data[0].v_double = collect_values[0].v_double;
value->data[1].v_double = collect_values[1].v_double;
return NULL;
}
static gchar *
gst_value_lcopy_double_range (const GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
gdouble *double_range_start = collect_values[0].v_pointer;
gdouble *double_range_end = collect_values[1].v_pointer;
if (!double_range_start)
return g_strdup_printf ("start value location for `%s' passed as NULL",
G_VALUE_TYPE_NAME (value));
if (!double_range_end)
return g_strdup_printf ("end value location for `%s' passed as NULL",
G_VALUE_TYPE_NAME (value));
*double_range_start = value->data[0].v_double;
*double_range_end = value->data[1].v_double;
return NULL;
}
/**
* gst_value_set_double_range:
* @value: a GValue initialized to GST_TYPE_DOUBLE_RANGE
* @start: the start of the range
* @end: the end of the range
*
* Sets @value to the range specified by @start and @end.
*/
void
gst_value_set_double_range (GValue * value, gdouble start, gdouble end)
{
g_return_if_fail (GST_VALUE_HOLDS_DOUBLE_RANGE (value));
g_return_if_fail (start < end);
value->data[0].v_double = start;
value->data[1].v_double = end;
}
/**
* gst_value_get_double_range_min:
* @value: a GValue initialized to GST_TYPE_DOUBLE_RANGE
*
* Gets the minimum of the range specified by @value.
*
* Returns: the minimum of the range
*/
gdouble
gst_value_get_double_range_min (const GValue * value)
{
g_return_val_if_fail (GST_VALUE_HOLDS_DOUBLE_RANGE (value), 0);
return value->data[0].v_double;
}
/**
* gst_value_get_double_range_max:
* @value: a GValue initialized to GST_TYPE_DOUBLE_RANGE
*
* Gets the maximum of the range specified by @value.
*
* Returns: the maximum of the range
*/
gdouble
gst_value_get_double_range_max (const GValue * value)
{
g_return_val_if_fail (GST_VALUE_HOLDS_DOUBLE_RANGE (value), 0);
return value->data[1].v_double;
}
static void
gst_value_transform_double_range_string (const GValue * src_value,
GValue * dest_value)
{
gchar s1[G_ASCII_DTOSTR_BUF_SIZE], s2[G_ASCII_DTOSTR_BUF_SIZE];
dest_value->data[0].v_pointer = g_strdup_printf ("[%s,%s]",
g_ascii_dtostr (s1, G_ASCII_DTOSTR_BUF_SIZE,
src_value->data[0].v_double),
g_ascii_dtostr (s2, G_ASCII_DTOSTR_BUF_SIZE,
src_value->data[1].v_double));
}
static gint
gst_value_compare_double_range (const GValue * value1, const GValue * value2)
{
if (value2->data[0].v_double == value1->data[0].v_double &&
value2->data[1].v_double == value1->data[1].v_double)
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
static gchar *
gst_value_serialize_double_range (const GValue * value)
{
gchar d1[G_ASCII_DTOSTR_BUF_SIZE];
gchar d2[G_ASCII_DTOSTR_BUF_SIZE];
g_ascii_dtostr (d1, G_ASCII_DTOSTR_BUF_SIZE, value->data[0].v_double);
g_ascii_dtostr (d2, G_ASCII_DTOSTR_BUF_SIZE, value->data[1].v_double);
return g_strdup_printf ("[ %s, %s ]", d1, d2);
}
static gboolean
gst_value_deserialize_double_range (GValue * dest, const gchar * s)
{
g_warning ("unimplemented");
return FALSE;
}
/****************
* fraction range *
****************/
static void
gst_value_init_fraction_range (GValue * value)
{
GValue *vals;
GType ftype;
ftype = GST_TYPE_FRACTION;
value->data[0].v_pointer = vals = g_slice_alloc0 (2 * sizeof (GValue));
g_value_init (&vals[0], ftype);
g_value_init (&vals[1], ftype);
}
static void
gst_value_free_fraction_range (GValue * value)
{
GValue *vals = (GValue *) value->data[0].v_pointer;
if (vals != NULL) {
/* we know the two values contain fractions without internal allocs */
/* g_value_unset (&vals[0]); */
/* g_value_unset (&vals[1]); */
g_slice_free1 (2 * sizeof (GValue), vals);
value->data[0].v_pointer = NULL;
}
}
static void
gst_value_copy_fraction_range (const GValue * src_value, GValue * dest_value)
{
GValue *vals = (GValue *) dest_value->data[0].v_pointer;
GValue *src_vals = (GValue *) src_value->data[0].v_pointer;
if (vals == NULL) {
gst_value_init_fraction_range (dest_value);
vals = dest_value->data[0].v_pointer;
}
if (src_vals != NULL) {
g_value_copy (&src_vals[0], &vals[0]);
g_value_copy (&src_vals[1], &vals[1]);
}
}
static gchar *
gst_value_collect_fraction_range (GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
GValue *vals = (GValue *) value->data[0].v_pointer;
if (n_collect_values != 4)
return g_strdup_printf ("not enough value locations for `%s' passed",
G_VALUE_TYPE_NAME (value));
if (collect_values[1].v_int == 0)
return g_strdup_printf ("passed '0' as first denominator for `%s'",
G_VALUE_TYPE_NAME (value));
if (collect_values[3].v_int == 0)
return g_strdup_printf ("passed '0' as second denominator for `%s'",
G_VALUE_TYPE_NAME (value));
if (gst_util_fraction_compare (collect_values[0].v_int,
collect_values[1].v_int, collect_values[2].v_int,
collect_values[3].v_int) >= 0)
return g_strdup_printf ("range start is not smaller than end for `%s'",
G_VALUE_TYPE_NAME (value));
if (vals == NULL) {
gst_value_init_fraction_range (value);
vals = value->data[0].v_pointer;
}
gst_value_set_fraction (&vals[0], collect_values[0].v_int,
collect_values[1].v_int);
gst_value_set_fraction (&vals[1], collect_values[2].v_int,
collect_values[3].v_int);
return NULL;
}
static gchar *
gst_value_lcopy_fraction_range (const GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
gint i;
gint *dest_values[4];
GValue *vals = (GValue *) value->data[0].v_pointer;
if (G_UNLIKELY (n_collect_values != 4))
return g_strdup_printf ("not enough value locations for `%s' passed",
G_VALUE_TYPE_NAME (value));
for (i = 0; i < 4; i++) {
if (G_UNLIKELY (collect_values[i].v_pointer == NULL)) {
return g_strdup_printf ("value location for `%s' passed as NULL",
G_VALUE_TYPE_NAME (value));
}
dest_values[i] = collect_values[i].v_pointer;
}
if (G_UNLIKELY (vals == NULL)) {
return g_strdup_printf ("Uninitialised `%s' passed",
G_VALUE_TYPE_NAME (value));
}
dest_values[0][0] = gst_value_get_fraction_numerator (&vals[0]);
dest_values[1][0] = gst_value_get_fraction_denominator (&vals[0]);
dest_values[2][0] = gst_value_get_fraction_numerator (&vals[1]);
dest_values[3][0] = gst_value_get_fraction_denominator (&vals[1]);
return NULL;
}
/**
* gst_value_set_fraction_range:
* @value: a GValue initialized to GST_TYPE_FRACTION_RANGE
* @start: the start of the range (a GST_TYPE_FRACTION GValue)
* @end: the end of the range (a GST_TYPE_FRACTION GValue)
*
* Sets @value to the range specified by @start and @end.
*/
void
gst_value_set_fraction_range (GValue * value, const GValue * start,
const GValue * end)
{
GValue *vals;
g_return_if_fail (GST_VALUE_HOLDS_FRACTION_RANGE (value));
g_return_if_fail (GST_VALUE_HOLDS_FRACTION (start));
g_return_if_fail (GST_VALUE_HOLDS_FRACTION (end));
g_return_if_fail (gst_util_fraction_compare (start->data[0].v_int,
start->data[1].v_int, end->data[0].v_int, end->data[1].v_int) < 0);
vals = (GValue *) value->data[0].v_pointer;
if (vals == NULL) {
gst_value_init_fraction_range (value);
vals = value->data[0].v_pointer;
}
g_value_copy (start, &vals[0]);
g_value_copy (end, &vals[1]);
}
/**
* gst_value_set_fraction_range_full:
* @value: a GValue initialized to GST_TYPE_FRACTION_RANGE
* @numerator_start: the numerator start of the range
* @denominator_start: the denominator start of the range
* @numerator_end: the numerator end of the range
* @denominator_end: the denominator end of the range
*
* Sets @value to the range specified by @numerator_start/@denominator_start
* and @numerator_end/@denominator_end.
*/
void
gst_value_set_fraction_range_full (GValue * value,
gint numerator_start, gint denominator_start,
gint numerator_end, gint denominator_end)
{
GValue start = { 0 };
GValue end = { 0 };
g_return_if_fail (value != NULL);
g_return_if_fail (denominator_start != 0);
g_return_if_fail (denominator_end != 0);
g_return_if_fail (gst_util_fraction_compare (numerator_start,
denominator_start, numerator_end, denominator_end) < 0);
g_value_init (&start, GST_TYPE_FRACTION);
g_value_init (&end, GST_TYPE_FRACTION);
gst_value_set_fraction (&start, numerator_start, denominator_start);
gst_value_set_fraction (&end, numerator_end, denominator_end);
gst_value_set_fraction_range (value, &start, &end);
/* we know the two values contain fractions without internal allocs */
/* g_value_unset (&start); */
/* g_value_unset (&end); */
}
/* FIXME 2.0: Don't leak the internal representation of fraction
* ranges but instead return the numerator and denominator
* separately.
* This would allow to store fraction ranges as
* data[0] = (min_n << 32) | (min_d)
* data[1] = (max_n << 32) | (max_d)
* without requiring an additional allocation for each value.
*/
/**
* gst_value_get_fraction_range_min:
* @value: a GValue initialized to GST_TYPE_FRACTION_RANGE
*
* Gets the minimum of the range specified by @value.
*
* Returns: (nullable): the minimum of the range
*/
const GValue *
gst_value_get_fraction_range_min (const GValue * value)
{
GValue *vals;
g_return_val_if_fail (GST_VALUE_HOLDS_FRACTION_RANGE (value), NULL);
vals = (GValue *) value->data[0].v_pointer;
if (vals != NULL) {
return &vals[0];
}
return NULL;
}
/**
* gst_value_get_fraction_range_max:
* @value: a GValue initialized to GST_TYPE_FRACTION_RANGE
*
* Gets the maximum of the range specified by @value.
*
* Returns: (nullable): the maximum of the range
*/
const GValue *
gst_value_get_fraction_range_max (const GValue * value)
{
GValue *vals;
g_return_val_if_fail (GST_VALUE_HOLDS_FRACTION_RANGE (value), NULL);
vals = (GValue *) value->data[0].v_pointer;
if (vals != NULL) {
return &vals[1];
}
return NULL;
}
static gchar *
gst_value_serialize_fraction_range (const GValue * value)
{
GValue *vals = (GValue *) value->data[0].v_pointer;
gchar *retval;
if (vals == NULL) {
retval = g_strdup ("[ 0/1, 0/1 ]");
} else {
gchar *start, *end;
start = gst_value_serialize_fraction (&vals[0]);
end = gst_value_serialize_fraction (&vals[1]);
retval = g_strdup_printf ("[ %s, %s ]", start, end);
g_free (start);
g_free (end);
}
return retval;
}
static void
gst_value_transform_fraction_range_string (const GValue * src_value,
GValue * dest_value)
{
dest_value->data[0].v_pointer =
gst_value_serialize_fraction_range (src_value);
}
static gint
gst_value_compare_fraction_range (const GValue * value1, const GValue * value2)
{
GValue *vals1, *vals2;
GstValueCompareFunc compare;
if (value2->data[0].v_pointer == value1->data[0].v_pointer)
return GST_VALUE_EQUAL; /* Only possible if both are NULL */
if (value2->data[0].v_pointer == NULL || value1->data[0].v_pointer == NULL)
return GST_VALUE_UNORDERED;
vals1 = (GValue *) value1->data[0].v_pointer;
vals2 = (GValue *) value2->data[0].v_pointer;
if ((compare = gst_value_get_compare_func (&vals1[0]))) {
if (gst_value_compare_with_func (&vals1[0], &vals2[0], compare) ==
GST_VALUE_EQUAL &&
gst_value_compare_with_func (&vals1[1], &vals2[1], compare) ==
GST_VALUE_EQUAL)
return GST_VALUE_EQUAL;
}
return GST_VALUE_UNORDERED;
}
static gboolean
gst_value_deserialize_fraction_range (GValue * dest, const gchar * s)
{
g_warning ("unimplemented");
return FALSE;
}
/***********
* GstCaps *
***********/
/**
* gst_value_set_caps:
* @value: a GValue initialized to GST_TYPE_CAPS
* @caps: (transfer none): the caps to set the value to
*
* Sets the contents of @value to @caps. A reference to the
* provided @caps will be taken by the @value.
*/
void
gst_value_set_caps (GValue * value, const GstCaps * caps)
{
g_return_if_fail (G_IS_VALUE (value));
g_return_if_fail (G_VALUE_TYPE (value) == GST_TYPE_CAPS);
g_return_if_fail (caps == NULL || GST_IS_CAPS (caps));
g_value_set_boxed (value, caps);
}
/**
* gst_value_get_caps:
* @value: a GValue initialized to GST_TYPE_CAPS
*
* Gets the contents of @value. The reference count of the returned
* #GstCaps will not be modified, therefore the caller must take one
* before getting rid of the @value.
*
* Returns: (transfer none): the contents of @value
*/
const GstCaps *
gst_value_get_caps (const GValue * value)
{
g_return_val_if_fail (G_IS_VALUE (value), NULL);
g_return_val_if_fail (G_VALUE_TYPE (value) == GST_TYPE_CAPS, NULL);
return (GstCaps *) g_value_get_boxed (value);
}
static gint
gst_value_compare_caps (const GValue * value1, const GValue * value2)
{
GstCaps *caps1 = GST_CAPS (gst_value_get_caps (value1));
GstCaps *caps2 = GST_CAPS (gst_value_get_caps (value2));
if (caps1 == caps2)
return GST_VALUE_EQUAL;
if (!caps1 || !caps2)
return GST_VALUE_UNORDERED;
if (gst_caps_is_equal (caps1, caps2))
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
static gchar *
gst_value_serialize_caps (const GValue * value)
{
GstCaps *caps = g_value_get_boxed (value);
return priv_gst_string_take_and_wrap (gst_caps_to_string (caps));
}
static gboolean
gst_value_deserialize_caps (GValue * dest, const gchar * s)
{
GstCaps *caps;
if (*s != '"') {
caps = gst_caps_from_string (s);
} else {
gchar *str = gst_string_unwrap (s);
if (G_UNLIKELY (!str))
return FALSE;
caps = gst_caps_from_string (str);
g_free (str);
}
if (caps) {
g_value_take_boxed (dest, caps);
return TRUE;
}
return FALSE;
}
/********************************************
* Serialization/deserialization of GValues *
********************************************/
static GstValueAbbreviation *
_priv_gst_value_get_abbrs (gint * n_abbrs)
{
static GstValueAbbreviation *abbrs = NULL;
static volatile gsize num = 0;
if (g_once_init_enter (&num)) {
/* dynamically generate the array */
gsize _num;
GstValueAbbreviation 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}
,
{"flagset", GST_TYPE_FLAG_SET}
,
{"sample", GST_TYPE_SAMPLE}
,
{"taglist", GST_TYPE_TAG_LIST}
,
{"type", G_TYPE_GTYPE}
,
{"array", GST_TYPE_ARRAY}
,
{"list", GST_TYPE_LIST}
};
_num = G_N_ELEMENTS (dyn_abbrs);
/* permanently allocate and copy the array now */
abbrs = g_new0 (GstValueAbbreviation, _num);
memcpy (abbrs, dyn_abbrs, sizeof (GstValueAbbreviation) * _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
_priv_gst_value_gtype_from_abbr (const char *type_name)
{
int i;
GstValueAbbreviation *abbrs;
gint n_abbrs;
GType ret;
g_return_val_if_fail (type_name != NULL, G_TYPE_INVALID);
abbrs = _priv_gst_value_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 */
ret = g_type_from_name (type_name);
/* If not found, try it as a dynamic type */
if (G_UNLIKELY (ret == 0))
ret = gst_dynamic_type_factory_load (type_name);
return ret;
}
const char *
_priv_gst_value_gtype_to_abbr (GType type)
{
int i;
GstValueAbbreviation *abbrs;
gint n_abbrs;
g_return_val_if_fail (type != G_TYPE_INVALID, NULL);
abbrs = _priv_gst_value_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);
}
/*
* _priv_gst_value_parse_string:
* @s: string to parse
* @end: out-pointer to char behind end of string
* @next: out-pointer to start of unread data
* @unescape: @TRUE if the substring is escaped.
*
* Find the end of a sub-string. If end == next, the string will not be
* null-terminated. In all other cases it will be.
*
* Note: This function modifies the string in @s (if unescape == @TRUE).
*
* Returns: @TRUE if a sub-string was found and @FALSE if the string is not
* terminated.
*/
gboolean
_priv_gst_value_parse_string (gchar * s, gchar ** end, gchar ** next,
gboolean unescape)
{
gchar *w;
if (*s == 0)
return FALSE;
if (*s != '"') {
int ret = _priv_gst_value_parse_simple_string (s, end);
*next = *end;
return ret;
}
/* Find the closing quotes */
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 {
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
_priv_gst_value_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 = _priv_gst_value_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 = _priv_gst_value_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 = _priv_gst_value_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
_priv_gst_value_parse_any_list (gchar * s, gchar ** after, GValue * value,
GType type, char begin, char end)
{
GValue list_value = { 0 };
gboolean ret;
GstValueList *vlist = VALUE_LIST_ARRAY (value);
if (*s != begin)
return FALSE;
s++;
while (g_ascii_isspace (*s))
s++;
while (*s != end) {
if (*s == ',') {
s++;
while (g_ascii_isspace (*s))
s++;
if (*s == ',')
return FALSE;
continue;
}
memset (&list_value, 0, sizeof (list_value));
ret = _priv_gst_value_parse_value (s, &s, &list_value, type);
if (!ret)
return FALSE;
_gst_value_list_append_val (vlist, &list_value);
while (g_ascii_isspace (*s))
s++;
if (*s != ',' && *s != end)
return FALSE;
}
s++;
*after = s;
return TRUE;
}
static gboolean
_priv_gst_value_parse_list (gchar * s, gchar ** after, GValue * value,
GType type)
{
return _priv_gst_value_parse_any_list (s, after, value, type, '{', '}');
}
static gboolean
_priv_gst_value_parse_array (gchar * s, gchar ** after, GValue * value,
GType type)
{
return _priv_gst_value_parse_any_list (s, after, value, type, '<', '>');
}
gboolean
_priv_gst_value_parse_simple_string (gchar * str, gchar ** end)
{
char *s = str;
while (G_LIKELY (GST_ASCII_IS_STRING (*s))) {
s++;
}
*end = s;
return (s != str);
}
gboolean
_priv_gst_value_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 (!_priv_gst_value_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 = _priv_gst_value_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 = _priv_gst_value_parse_range (s, &s, value, type);
} else if (*s == '{') {
g_value_init (value, GST_TYPE_LIST);
ret = _priv_gst_value_parse_list (s, &s, value, type);
} else if (*s == '<') {
g_value_init (value, GST_TYPE_ARRAY);
ret = _priv_gst_value_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 (!_priv_gst_value_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 (!_priv_gst_value_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;
}
/**************
* GstSegment *
**************/
static gchar *
gst_value_serialize_segment_internal (const GValue * value, gboolean escape)
{
GstSegment *seg = g_value_get_boxed (value);
gchar *t, *res;
GstStructure *s;
s = gst_structure_new ("GstSegment",
"flags", GST_TYPE_SEGMENT_FLAGS, seg->flags,
"rate", G_TYPE_DOUBLE, seg->rate,
"applied-rate", G_TYPE_DOUBLE, seg->applied_rate,
"format", GST_TYPE_FORMAT, seg->format,
"base", G_TYPE_UINT64, seg->base,
"offset", G_TYPE_UINT64, seg->offset,
"start", G_TYPE_UINT64, seg->start,
"stop", G_TYPE_UINT64, seg->stop,
"time", G_TYPE_UINT64, seg->time,
"position", G_TYPE_UINT64, seg->position,
"duration", G_TYPE_UINT64, seg->duration, NULL);
t = gst_structure_to_string (s);
if (escape) {
res = g_strdup_printf ("\"%s\"", t);
g_free (t);
} else {
res = t;
}
gst_structure_free (s);
return res;
}
static gchar *
gst_value_serialize_segment (const GValue * value)
{
return gst_value_serialize_segment_internal (value, TRUE);
}
static gboolean
gst_value_deserialize_segment (GValue * dest, const gchar * s)
{
GstStructure *str;
GstSegment seg;
gboolean res;
str = gst_structure_from_string (s, NULL);
if (str == NULL)
return FALSE;
res = gst_structure_get (str,
"flags", GST_TYPE_SEGMENT_FLAGS, &seg.flags,
"rate", G_TYPE_DOUBLE, &seg.rate,
"applied-rate", G_TYPE_DOUBLE, &seg.applied_rate,
"format", GST_TYPE_FORMAT, &seg.format,
"base", G_TYPE_UINT64, &seg.base,
"offset", G_TYPE_UINT64, &seg.offset,
"start", G_TYPE_UINT64, &seg.start,
"stop", G_TYPE_UINT64, &seg.stop,
"time", G_TYPE_UINT64, &seg.time,
"position", G_TYPE_UINT64, &seg.position,
"duration", G_TYPE_UINT64, &seg.duration, NULL);
gst_structure_free (str);
if (res)
g_value_set_boxed (dest, &seg);
return res;
}
/****************
* GstStructure *
****************/
/**
* gst_value_set_structure:
* @value: a GValue initialized to GST_TYPE_STRUCTURE
* @structure: the structure to set the value to
*
* Sets the contents of @value to @structure.
*/
void
gst_value_set_structure (GValue * value, const GstStructure * structure)
{
g_return_if_fail (G_IS_VALUE (value));
g_return_if_fail (G_VALUE_TYPE (value) == GST_TYPE_STRUCTURE);
g_return_if_fail (structure == NULL || GST_IS_STRUCTURE (structure));
g_value_set_boxed (value, structure);
}
/**
* gst_value_get_structure:
* @value: a GValue initialized to GST_TYPE_STRUCTURE
*
* Gets the contents of @value.
*
* Returns: (transfer none): the contents of @value
*/
const GstStructure *
gst_value_get_structure (const GValue * value)
{
g_return_val_if_fail (G_IS_VALUE (value), NULL);
g_return_val_if_fail (G_VALUE_TYPE (value) == GST_TYPE_STRUCTURE, NULL);
return (GstStructure *) g_value_get_boxed (value);
}
static gchar *
gst_value_serialize_structure (const GValue * value)
{
GstStructure *structure = g_value_get_boxed (value);
return priv_gst_string_take_and_wrap (gst_structure_to_string (structure));
}
static gboolean
gst_value_deserialize_structure (GValue * dest, const gchar * s)
{
GstStructure *structure;
if (*s != '"') {
structure = gst_structure_from_string (s, NULL);
} else {
gchar *str = gst_string_unwrap (s);
if (G_UNLIKELY (!str))
return FALSE;
structure = gst_structure_from_string (str, NULL);
g_free (str);
}
if (G_LIKELY (structure)) {
g_value_take_boxed (dest, structure);
return TRUE;
}
return FALSE;
}
static gboolean
gst_value_compare_structure (const GValue * value1, const GValue * value2)
{
GstStructure *structure1 = GST_STRUCTURE (g_value_get_boxed (value1));
GstStructure *structure2 = GST_STRUCTURE (g_value_get_boxed (value2));
if (structure1 == structure2)
return GST_VALUE_EQUAL;
if (!structure1 || !structure2)
return GST_VALUE_UNORDERED;
if (gst_structure_is_equal (structure1, structure2))
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
/*******************
* GstCapsFeatures *
*******************/
/**
* gst_value_set_caps_features:
* @value: a GValue initialized to GST_TYPE_CAPS_FEATURES
* @features: the features to set the value to
*
* Sets the contents of @value to @features.
*/
void
gst_value_set_caps_features (GValue * value, const GstCapsFeatures * features)
{
g_return_if_fail (G_IS_VALUE (value));
g_return_if_fail (G_VALUE_TYPE (value) == GST_TYPE_CAPS_FEATURES);
g_return_if_fail (features == NULL || GST_IS_CAPS_FEATURES (features));
g_value_set_boxed (value, features);
}
/**
* gst_value_get_caps_features:
* @value: a GValue initialized to GST_TYPE_CAPS_FEATURES
*
* Gets the contents of @value.
*
* Returns: (transfer none): the contents of @value
*/
const GstCapsFeatures *
gst_value_get_caps_features (const GValue * value)
{
g_return_val_if_fail (G_IS_VALUE (value), NULL);
g_return_val_if_fail (G_VALUE_TYPE (value) == GST_TYPE_CAPS_FEATURES, NULL);
return (GstCapsFeatures *) g_value_get_boxed (value);
}
static gchar *
gst_value_serialize_caps_features (const GValue * value)
{
GstCapsFeatures *features = g_value_get_boxed (value);
return priv_gst_string_take_and_wrap (gst_caps_features_to_string (features));
}
static gboolean
gst_value_deserialize_caps_features (GValue * dest, const gchar * s)
{
GstCapsFeatures *features;
if (*s != '"') {
features = gst_caps_features_from_string (s);
} else {
gchar *str = gst_string_unwrap (s);
if (G_UNLIKELY (!str))
return FALSE;
features = gst_caps_features_from_string (str);
g_free (str);
}
if (G_LIKELY (features)) {
g_value_take_boxed (dest, features);
return TRUE;
}
return FALSE;
}
/**************
* GstTagList *
**************/
static gint
gst_value_compare_tag_list (const GValue * value1, const GValue * value2)
{
GstTagList *taglist1 = GST_TAG_LIST (g_value_get_boxed (value1));
GstTagList *taglist2 = GST_TAG_LIST (g_value_get_boxed (value2));
if (gst_tag_list_is_equal (taglist1, taglist2))
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
static gboolean
gst_value_deserialize_tag_list (GValue * dest, const gchar * s)
{
GstTagList *taglist;
if (*s != '"') {
taglist = gst_tag_list_new_from_string (s);
} else {
gchar *str = gst_string_unwrap (s);
if (G_UNLIKELY (!str))
return FALSE;
taglist = gst_tag_list_new_from_string (str);
g_free (str);
}
if (G_LIKELY (taglist != NULL)) {
g_value_take_boxed (dest, taglist);
return TRUE;
}
return FALSE;
}
static gchar *
gst_value_serialize_tag_list (const GValue * value)
{
GstTagList *taglist = g_value_get_boxed (value);
return priv_gst_string_take_and_wrap (gst_tag_list_to_string (taglist));
}
/*************
* GstBuffer *
*************/
static gint
compare_buffer (GstBuffer * buf1, GstBuffer * buf2)
{
gsize size1, size2;
GstMapInfo info1, info2;
gint result, mret;
if (buf1 == buf2)
return GST_VALUE_EQUAL;
size1 = gst_buffer_get_size (buf1);
size2 = gst_buffer_get_size (buf2);
if (size1 != size2)
return GST_VALUE_UNORDERED;
if (size1 == 0)
return GST_VALUE_EQUAL;
if (!gst_buffer_map (buf1, &info1, GST_MAP_READ))
return GST_VALUE_UNORDERED;
if (!gst_buffer_map (buf2, &info2, GST_MAP_READ)) {
gst_buffer_unmap (buf1, &info1);
return GST_VALUE_UNORDERED;
}
mret = memcmp (info1.data, info2.data, info1.size);
if (mret == 0)
result = GST_VALUE_EQUAL;
else if (mret < 0)
result = GST_VALUE_LESS_THAN;
else
result = GST_VALUE_GREATER_THAN;
gst_buffer_unmap (buf1, &info1);
gst_buffer_unmap (buf2, &info2);
return result;
}
static gint
gst_value_compare_buffer (const GValue * value1, const GValue * value2)
{
GstBuffer *buf1 = gst_value_get_buffer (value1);
GstBuffer *buf2 = gst_value_get_buffer (value2);
return compare_buffer (buf1, buf2);
}
static gchar *
gst_value_serialize_buffer (const GValue * value)
{
GstMapInfo info;
guint8 *data;
gint i;
gchar *string;
GstBuffer *buffer;
buffer = gst_value_get_buffer (value);
if (buffer == NULL)
return NULL;
if (!gst_buffer_map (buffer, &info, GST_MAP_READ))
return NULL;
data = info.data;
string = g_malloc (info.size * 2 + 1);
for (i = 0; i < info.size; i++) {
sprintf (string + i * 2, "%02x", data[i]);
}
string[info.size * 2] = 0;
gst_buffer_unmap (buffer, &info);
return string;
}
static gboolean
gst_value_deserialize_buffer (GValue * dest, const gchar * s)
{
GstBuffer *buffer;
gint len;
gchar ts[3];
GstMapInfo info;
guint8 *data;
gint i;
len = strlen (s);
if (len & 1)
goto wrong_length;
buffer = gst_buffer_new_allocate (NULL, len / 2, NULL);
if (!gst_buffer_map (buffer, &info, GST_MAP_WRITE))
goto map_failed;
data = info.data;
for (i = 0; i < len / 2; i++) {
if (!isxdigit ((int) s[i * 2]) || !isxdigit ((int) s[i * 2 + 1]))
goto wrong_char;
ts[0] = s[i * 2 + 0];
ts[1] = s[i * 2 + 1];
ts[2] = 0;
data[i] = (guint8) strtoul (ts, NULL, 16);
}
gst_buffer_unmap (buffer, &info);
gst_value_take_buffer (dest, buffer);
return TRUE;
/* ERRORS */
wrong_length:
{
return FALSE;
}
map_failed:
{
return FALSE;
}
wrong_char:
{
gst_buffer_unref (buffer);
gst_buffer_unmap (buffer, &info);
return FALSE;
}
}
/*************
* GstSample *
*************/
/* This function is mostly used for comparing image/buffer tags in taglists */
static gint
gst_value_compare_sample (const GValue * value1, const GValue * value2)
{
GstBuffer *buf1 = gst_sample_get_buffer (gst_value_get_sample (value1));
GstBuffer *buf2 = gst_sample_get_buffer (gst_value_get_sample (value2));
/* FIXME: should we take into account anything else such as caps? */
return compare_buffer (buf1, buf2);
}
static gchar *
gst_value_serialize_sample (const GValue * value)
{
const GstStructure *info_structure;
GstSegment *segment;
GstBuffer *buffer;
GstCaps *caps;
GstSample *sample;
GValue val = { 0, };
gchar *info_str, *caps_str, *tmp;
gchar *buf_str, *seg_str, *s;
sample = g_value_get_boxed (value);
buffer = gst_sample_get_buffer (sample);
if (buffer) {
g_value_init (&val, GST_TYPE_BUFFER);
g_value_set_boxed (&val, buffer);
buf_str = gst_value_serialize_buffer (&val);
g_value_unset (&val);
} else {
buf_str = g_strdup ("None");
}
caps = gst_sample_get_caps (sample);
if (caps) {
tmp = gst_caps_to_string (caps);
caps_str = g_base64_encode ((guchar *) tmp, strlen (tmp) + 1);
g_strdelimit (caps_str, "=", '_');
g_free (tmp);
} else {
caps_str = g_strdup ("None");
}
segment = gst_sample_get_segment (sample);
if (segment) {
g_value_init (&val, GST_TYPE_SEGMENT);
g_value_set_boxed (&val, segment);
tmp = gst_value_serialize_segment_internal (&val, FALSE);
seg_str = g_base64_encode ((guchar *) tmp, strlen (tmp) + 1);
g_strdelimit (seg_str, "=", '_');
g_free (tmp);
g_value_unset (&val);
} else {
seg_str = g_strdup ("None");
}
info_structure = gst_sample_get_info (sample);
if (info_structure) {
tmp = gst_structure_to_string (info_structure);
info_str = g_base64_encode ((guchar *) tmp, strlen (tmp) + 1);
g_strdelimit (info_str, "=", '_');
g_free (tmp);
} else {
info_str = g_strdup ("None");
}
s = g_strconcat (buf_str, ":", caps_str, ":", seg_str, ":", info_str, NULL);
g_free (buf_str);
g_free (caps_str);
g_free (seg_str);
g_free (info_str);
return s;
}
static gboolean
gst_value_deserialize_sample (GValue * dest, const gchar * s)
{
GValue bval = G_VALUE_INIT, sval = G_VALUE_INIT;
GstStructure *info;
GstSample *sample;
GstCaps *caps = NULL;
gboolean ret = FALSE;
gchar **fields;
gsize outlen;
gint len;
GST_TRACE ("deserialize '%s'", s);
fields = g_strsplit (s, ":", -1);
len = g_strv_length (fields);
if (len != 4)
goto wrong_length;
g_value_init (&bval, GST_TYPE_BUFFER);
g_value_init (&sval, GST_TYPE_SEGMENT);
if (!gst_value_deserialize_buffer (&bval, fields[0]))
goto fail;
if (strcmp (fields[1], "None") != 0) {
g_strdelimit (fields[1], "_", '=');
g_base64_decode_inplace (fields[1], &outlen);
GST_TRACE ("caps : %s", fields[1]);
caps = gst_caps_from_string (fields[1]);
if (caps == NULL)
goto fail;
}
if (strcmp (fields[2], "None") != 0) {
g_strdelimit (fields[2], "_", '=');
g_base64_decode_inplace (fields[2], &outlen);
GST_TRACE ("segment : %s", fields[2]);
if (!gst_value_deserialize_segment (&sval, fields[2]))
goto fail;
}
if (strcmp (fields[3], "None") != 0) {
g_strdelimit (fields[3], "_", '=');
g_base64_decode_inplace (fields[3], &outlen);
GST_TRACE ("info : %s", fields[3]);
info = gst_structure_from_string (fields[3], NULL);
if (info == NULL)
goto fail;
} else {
info = NULL;
}
sample = gst_sample_new (gst_value_get_buffer (&bval), caps,
g_value_get_boxed (&sval), info);
g_value_take_boxed (dest, sample);
ret = TRUE;
fail:
if (caps)
gst_caps_unref (caps);
g_value_unset (&bval);
g_value_unset (&sval);
wrong_length:
g_strfreev (fields);
return ret;
}
/***********
* boolean *
***********/
static gint
gst_value_compare_boolean (const GValue * value1, const GValue * value2)
{
if ((value1->data[0].v_int != 0) == (value2->data[0].v_int != 0))
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
static gchar *
gst_value_serialize_boolean (const GValue * value)
{
if (value->data[0].v_int) {
return g_strdup ("true");
}
return g_strdup ("false");
}
static gboolean
gst_value_deserialize_boolean (GValue * dest, const gchar * s)
{
gboolean ret = FALSE;
if (g_ascii_strcasecmp (s, "true") == 0 ||
g_ascii_strcasecmp (s, "yes") == 0 ||
g_ascii_strcasecmp (s, "t") == 0 || strcmp (s, "1") == 0) {
g_value_set_boolean (dest, TRUE);
ret = TRUE;
} else if (g_ascii_strcasecmp (s, "false") == 0 ||
g_ascii_strcasecmp (s, "no") == 0 ||
g_ascii_strcasecmp (s, "f") == 0 || strcmp (s, "0") == 0) {
g_value_set_boolean (dest, FALSE);
ret = TRUE;
}
return ret;
}
#define CREATE_SERIALIZATION_START(_type,_macro) \
static gint \
gst_value_compare_ ## _type \
(const GValue * value1, const GValue * value2) \
{ \
g ## _type val1 = g_value_get_ ## _type (value1); \
g ## _type val2 = g_value_get_ ## _type (value2); \
if (val1 > val2) \
return GST_VALUE_GREATER_THAN; \
if (val1 < val2) \
return GST_VALUE_LESS_THAN; \
return GST_VALUE_EQUAL; \
} \
\
static gchar * \
gst_value_serialize_ ## _type (const GValue * value) \
{ \
GValue val = { 0, }; \
g_value_init (&val, G_TYPE_STRING); \
if (!g_value_transform (value, &val)) \
g_assert_not_reached (); \
/* NO_COPY_MADNESS!!! */ \
return (char *) g_value_get_string (&val); \
}
/* deserialize the given s into to as a gint64.
* check if the result is actually storeable in the given size number of
* bytes.
*/
static gboolean
gst_value_deserialize_int_helper (gint64 * to, const gchar * s,
gint64 min, gint64 max, gint size)
{
gboolean ret = FALSE;
gchar *end;
guint64 mask = ~0;
errno = 0;
*to = g_ascii_strtoull (s, &end, 0);
/* a range error is a definitive no-no */
if (errno == ERANGE) {
return FALSE;
}
if (*end == 0) {
ret = TRUE;
} else {
if (g_ascii_strcasecmp (s, "little_endian") == 0) {
*to = G_LITTLE_ENDIAN;
ret = TRUE;
} else if (g_ascii_strcasecmp (s, "big_endian") == 0) {
*to = G_BIG_ENDIAN;
ret = TRUE;
} else if (g_ascii_strcasecmp (s, "byte_order") == 0) {
*to = G_BYTE_ORDER;
ret = TRUE;
} else if (g_ascii_strcasecmp (s, "min") == 0) {
*to = min;
ret = TRUE;
} else if (g_ascii_strcasecmp (s, "max") == 0) {
*to = max;
ret = TRUE;
}
}
if (ret) {
/* by definition, a gint64 fits into a gint64; so ignore those */
if (size != sizeof (mask)) {
if (*to >= 0) {
/* for positive numbers, we create a mask of 1's outside of the range
* and 0's inside the range. An and will thus keep only 1 bits
* outside of the range */
mask <<= (size * 8);
if ((mask & *to) != 0) {
ret = FALSE;
}
} else {
/* for negative numbers, we do a 2's complement version */
mask <<= ((size * 8) - 1);
if ((mask & *to) != mask) {
ret = FALSE;
}
}
}
}
return ret;
}
#define CREATE_SERIALIZATION(_type,_macro) \
CREATE_SERIALIZATION_START(_type,_macro) \
\
static gboolean \
gst_value_deserialize_ ## _type (GValue * dest, const gchar *s) \
{ \
gint64 x; \
\
if (gst_value_deserialize_int_helper (&x, s, G_MIN ## _macro, \
G_MAX ## _macro, sizeof (g ## _type))) { \
g_value_set_ ## _type (dest, /*(g ## _type)*/ x); \
return TRUE; \
} else { \
return FALSE; \
} \
}
#define CREATE_USERIALIZATION(_type,_macro) \
CREATE_SERIALIZATION_START(_type,_macro) \
\
static gboolean \
gst_value_deserialize_ ## _type (GValue * dest, const gchar *s) \
{ \
gint64 x; \
gchar *end; \
gboolean ret = FALSE; \
\
errno = 0; \
x = g_ascii_strtoull (s, &end, 0); \
/* a range error is a definitive no-no */ \
if (errno == ERANGE) { \
return FALSE; \
} \
/* the cast ensures the range check later on makes sense */ \
x = (g ## _type) x; \
if (*end == 0) { \
ret = TRUE; \
} else { \
if (g_ascii_strcasecmp (s, "little_endian") == 0) { \
x = G_LITTLE_ENDIAN; \
ret = TRUE; \
} else if (g_ascii_strcasecmp (s, "big_endian") == 0) { \
x = G_BIG_ENDIAN; \
ret = TRUE; \
} else if (g_ascii_strcasecmp (s, "byte_order") == 0) { \
x = G_BYTE_ORDER; \
ret = TRUE; \
} else if (g_ascii_strcasecmp (s, "min") == 0) { \
x = 0; \
ret = TRUE; \
} else if (g_ascii_strcasecmp (s, "max") == 0) { \
x = G_MAX ## _macro; \
ret = TRUE; \
} \
} \
if (ret) { \
if (x > G_MAX ## _macro) { \
ret = FALSE; \
} else { \
g_value_set_ ## _type (dest, x); \
} \
} \
return ret; \
}
CREATE_SERIALIZATION (int, INT);
CREATE_SERIALIZATION (int64, INT64);
CREATE_SERIALIZATION (long, LONG);
CREATE_USERIALIZATION (uint, UINT);
CREATE_USERIALIZATION (uint64, UINT64);
CREATE_USERIALIZATION (ulong, ULONG);
/* FIXME 2.0: remove this again, plugins shouldn't have uchar properties */
#ifndef G_MAXUCHAR
#define G_MAXUCHAR 255
#endif
CREATE_USERIALIZATION (uchar, UCHAR);
/**********
* double *
**********/
static gint
gst_value_compare_double (const GValue * value1, const GValue * value2)
{
if (value1->data[0].v_double > value2->data[0].v_double)
return GST_VALUE_GREATER_THAN;
if (value1->data[0].v_double < value2->data[0].v_double)
return GST_VALUE_LESS_THAN;
if (value1->data[0].v_double == value2->data[0].v_double)
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
static gchar *
gst_value_serialize_double (const GValue * value)
{
gchar d[G_ASCII_DTOSTR_BUF_SIZE];
g_ascii_dtostr (d, G_ASCII_DTOSTR_BUF_SIZE, value->data[0].v_double);
return g_strdup (d);
}
static gboolean
gst_value_deserialize_double (GValue * dest, const gchar * s)
{
gdouble x;
gboolean ret = FALSE;
gchar *end;
x = g_ascii_strtod (s, &end);
if (*end == 0) {
ret = TRUE;
} else {
if (g_ascii_strcasecmp (s, "min") == 0) {
x = -G_MAXDOUBLE;
ret = TRUE;
} else if (g_ascii_strcasecmp (s, "max") == 0) {
x = G_MAXDOUBLE;
ret = TRUE;
}
}
if (ret) {
g_value_set_double (dest, x);
}
return ret;
}
/*********
* float *
*********/
static gint
gst_value_compare_float (const GValue * value1, const GValue * value2)
{
if (value1->data[0].v_float > value2->data[0].v_float)
return GST_VALUE_GREATER_THAN;
if (value1->data[0].v_float < value2->data[0].v_float)
return GST_VALUE_LESS_THAN;
if (value1->data[0].v_float == value2->data[0].v_float)
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
static gchar *
gst_value_serialize_float (const GValue * value)
{
gchar d[G_ASCII_DTOSTR_BUF_SIZE];
g_ascii_dtostr (d, G_ASCII_DTOSTR_BUF_SIZE, value->data[0].v_float);
return g_strdup (d);
}
static gboolean
gst_value_deserialize_float (GValue * dest, const gchar * s)
{
gdouble x;
gboolean ret = FALSE;
gchar *end;
x = g_ascii_strtod (s, &end);
if (*end == 0) {
ret = TRUE;
} else {
if (g_ascii_strcasecmp (s, "min") == 0) {
x = -G_MAXFLOAT;
ret = TRUE;
} else if (g_ascii_strcasecmp (s, "max") == 0) {
x = G_MAXFLOAT;
ret = TRUE;
}
}
if (x > G_MAXFLOAT || x < -G_MAXFLOAT)
ret = FALSE;
if (ret) {
g_value_set_float (dest, (float) x);
}
return ret;
}
/**********
* string *
**********/
static gint
gst_value_compare_string (const GValue * value1, const GValue * value2)
{
if (G_UNLIKELY (!value1->data[0].v_pointer || !value2->data[0].v_pointer)) {
/* if only one is NULL, no match - otherwise both NULL == EQUAL */
if (value1->data[0].v_pointer != value2->data[0].v_pointer)
return GST_VALUE_UNORDERED;
} else {
gint x = strcmp (value1->data[0].v_pointer, value2->data[0].v_pointer);
if (x < 0)
return GST_VALUE_LESS_THAN;
if (x > 0)
return GST_VALUE_GREATER_THAN;
}
return GST_VALUE_EQUAL;
}
static gint
gst_string_measure_wrapping (const gchar * s)
{
gint len;
gboolean wrap = FALSE;
if (G_UNLIKELY (s == NULL))
return -1;
/* Special case: the actual string NULL needs wrapping */
if (G_UNLIKELY (strcmp (s, "NULL") == 0))
return 4;
len = 0;
while (*s) {
if (GST_ASCII_IS_STRING (*s)) {
len++;
} else if (*s < 0x20 || *s >= 0x7f) {
wrap = TRUE;
len += 4;
} else {
wrap = TRUE;
len += 2;
}
s++;
}
/* Wrap the string if we found something that needs
* wrapping, or the empty string (len == 0) */
return (wrap || len == 0) ? len : -1;
}
static gchar *
gst_string_wrap_inner (const gchar * s, gint len)
{
gchar *d, *e;
e = d = g_malloc (len + 3);
*e++ = '\"';
while (*s) {
if (GST_ASCII_IS_STRING (*s)) {
*e++ = *s++;
} else if (*s < 0x20 || *s >= 0x7f) {
*e++ = '\\';
*e++ = '0' + ((*(guchar *) s) >> 6);
*e++ = '0' + (((*s) >> 3) & 0x7);
*e++ = '0' + ((*s++) & 0x7);
} else {
*e++ = '\\';
*e++ = *s++;
}
}
*e++ = '\"';
*e = 0;
g_assert (e - d <= len + 3);
return d;
}
/* Do string wrapping/escaping */
static gchar *
gst_string_wrap (const gchar * s)
{
gint len = gst_string_measure_wrapping (s);
if (G_LIKELY (len < 0))
return g_strdup (s);
return gst_string_wrap_inner (s, len);
}
/* Same as above, but take ownership of the string */
gchar *
priv_gst_string_take_and_wrap (gchar * s)
{
gchar *out;
gint len = gst_string_measure_wrapping (s);
if (G_LIKELY (len < 0))
return s;
out = gst_string_wrap_inner (s, len);
g_free (s);
return out;
}
/*
* This function takes a string delimited with double quotes (")
* and unescapes any \xxx octal numbers.
*
* If sequences of \y are found where y is not in the range of
* 0->3, y is copied unescaped.
*
* If \xyy is found where x is an octal number but y is not, an
* error is encountered and %NULL is returned.
*
* the input string must be \0 terminated.
*/
static gchar *
gst_string_unwrap (const gchar * s)
{
gchar *ret;
gchar *read, *write;
/* NULL string returns NULL */
if (s == NULL)
return NULL;
/* strings not starting with " are invalid */
if (*s != '"')
return NULL;
/* make copy of original string to hold the result. This
* string will always be smaller than the original */
ret = g_strdup (s);
read = ret;
write = ret;
/* need to move to the next position as we parsed the " */
read++;
while (*read) {
if (GST_ASCII_IS_STRING (*read)) {
/* normal chars are just copied */
*write++ = *read++;
} else if (*read == '"') {
/* quote marks end of string */
break;
} else if (*read == '\\') {
/* got an escape char, move to next position to read a tripplet
* of octal numbers */
read++;
/* is the next char a possible first octal number? */
if (*read >= '0' && *read <= '3') {
/* parse other 2 numbers, if one of them is not in the range of
* an octal number, we error. We also catch the case where a zero
* byte is found here. */
if (read[1] < '0' || read[1] > '7' || read[2] < '0' || read[2] > '7')
goto beach;
/* now convert the octal number to a byte again. */
*write++ = ((read[0] - '0') << 6) +
((read[1] - '0') << 3) + (read[2] - '0');
read += 3;
} else {
/* if we run into a \0 here, we definitely won't get a quote later */
if (*read == 0)
goto beach;
/* else copy \X sequence */
*write++ = *read++;
}
} else {
/* weird character, error */
goto beach;
}
}
/* if the string is not ending in " and zero terminated, we error */
if (*read != '"' || read[1] != '\0')
goto beach;
/* null terminate result string and return */
*write = '\0';
return ret;
beach:
g_free (ret);
return NULL;
}
static gchar *
gst_value_serialize_string (const GValue * value)
{
return gst_string_wrap (value->data[0].v_pointer);
}
static gboolean
gst_value_deserialize_string (GValue * dest, const gchar * s)
{
if (G_UNLIKELY (strcmp (s, "NULL") == 0)) {
g_value_set_string (dest, NULL);
return TRUE;
} else if (G_LIKELY (*s != '"' || s[strlen (s) - 1] != '"')) {
if (!g_utf8_validate (s, -1, NULL))
return FALSE;
g_value_set_string (dest, s);
return TRUE;
} else {
/* strings delimited with double quotes should be unwrapped */
gchar *str = gst_string_unwrap (s);
if (G_UNLIKELY (!str))
return FALSE;
g_value_take_string (dest, str);
}
return TRUE;
}
/********
* enum *
********/
static gint
gst_value_compare_enum (const GValue * value1, const GValue * value2)
{
GEnumValue *en1, *en2;
GEnumClass *klass1 = (GEnumClass *) g_type_class_ref (G_VALUE_TYPE (value1));
GEnumClass *klass2 = (GEnumClass *) g_type_class_ref (G_VALUE_TYPE (value2));
g_return_val_if_fail (klass1, GST_VALUE_UNORDERED);
g_return_val_if_fail (klass2, GST_VALUE_UNORDERED);
en1 = g_enum_get_value (klass1, g_value_get_enum (value1));
en2 = g_enum_get_value (klass2, g_value_get_enum (value2));
g_type_class_unref (klass1);
g_type_class_unref (klass2);
g_return_val_if_fail (en1, GST_VALUE_UNORDERED);
g_return_val_if_fail (en2, GST_VALUE_UNORDERED);
if (en1->value < en2->value)
return GST_VALUE_LESS_THAN;
if (en1->value > en2->value)
return GST_VALUE_GREATER_THAN;
return GST_VALUE_EQUAL;
}
static gchar *
gst_value_serialize_enum (const GValue * value)
{
GEnumValue *en;
GEnumClass *klass = (GEnumClass *) g_type_class_ref (G_VALUE_TYPE (value));
g_return_val_if_fail (klass, NULL);
en = g_enum_get_value (klass, g_value_get_enum (value));
g_type_class_unref (klass);
/* might be one of the custom formats registered later */
if (G_UNLIKELY (en == NULL && G_VALUE_TYPE (value) == GST_TYPE_FORMAT)) {
const GstFormatDefinition *format_def;
format_def = gst_format_get_details ((GstFormat) g_value_get_enum (value));
g_return_val_if_fail (format_def != NULL, NULL);
return g_strdup (format_def->description);
}
g_return_val_if_fail (en, NULL);
return g_strdup (en->value_nick);
}
static gint
gst_value_deserialize_enum_iter_cmp (const GValue * format_def_value,
const gchar * s)
{
const GstFormatDefinition *format_def =
g_value_get_pointer (format_def_value);
if (g_ascii_strcasecmp (s, format_def->nick) == 0)
return 0;
return g_ascii_strcasecmp (s, format_def->description);
}
static gboolean
gst_value_deserialize_enum (GValue * dest, const gchar * s)
{
GEnumValue *en;
gchar *endptr = NULL;
GEnumClass *klass = (GEnumClass *) g_type_class_ref (G_VALUE_TYPE (dest));
g_return_val_if_fail (klass, FALSE);
if (!(en = g_enum_get_value_by_name (klass, s))) {
if (!(en = g_enum_get_value_by_nick (klass, s))) {
gint i = strtol (s, &endptr, 0);
if (endptr && *endptr == '\0') {
en = g_enum_get_value (klass, i);
}
}
}
g_type_class_unref (klass);
/* might be one of the custom formats registered later */
if (G_UNLIKELY (en == NULL && G_VALUE_TYPE (dest) == GST_TYPE_FORMAT)) {
GValue res = { 0, };
const GstFormatDefinition *format_def;
GstIterator *iter;
gboolean found;
iter = gst_format_iterate_definitions ();
found = gst_iterator_find_custom (iter,
(GCompareFunc) gst_value_deserialize_enum_iter_cmp, &res, (gpointer) s);
if (found) {
format_def = g_value_get_pointer (&res);
g_return_val_if_fail (format_def != NULL, FALSE);
g_value_set_enum (dest, (gint) format_def->value);
g_value_unset (&res);
}
gst_iterator_free (iter);
return found;
}
/* enum name/nick not found */
if (en == NULL)
return FALSE;
g_value_set_enum (dest, en->value);
return TRUE;
}
/********
* flags *
********/
/* we just compare the value here */
static gint
gst_value_compare_gflags (const GValue * value1, const GValue * value2)
{
guint fl1, fl2;
GFlagsClass *klass1 =
(GFlagsClass *) g_type_class_ref (G_VALUE_TYPE (value1));
GFlagsClass *klass2 =
(GFlagsClass *) g_type_class_ref (G_VALUE_TYPE (value2));
g_return_val_if_fail (klass1, GST_VALUE_UNORDERED);
g_return_val_if_fail (klass2, GST_VALUE_UNORDERED);
fl1 = g_value_get_flags (value1);
fl2 = g_value_get_flags (value2);
g_type_class_unref (klass1);
g_type_class_unref (klass2);
if (fl1 < fl2)
return GST_VALUE_LESS_THAN;
if (fl1 > fl2)
return GST_VALUE_GREATER_THAN;
return GST_VALUE_EQUAL;
}
/* the different flags are serialized separated with a + */
static gchar *
gst_value_serialize_gflags (const GValue * value)
{
guint flags;
GFlagsValue *fl;
GFlagsClass *klass = (GFlagsClass *) g_type_class_ref (G_VALUE_TYPE (value));
gchar *result, *tmp;
gboolean first = TRUE;
g_return_val_if_fail (klass, NULL);
flags = g_value_get_flags (value);
/* if no flags are set, try to serialize to the _NONE string */
if (!flags) {
fl = g_flags_get_first_value (klass, flags);
if (fl)
return g_strdup (fl->value_name);
else
return g_strdup ("0");
}
/* some flags are set, so serialize one by one */
result = g_strdup ("");
while (flags) {
fl = g_flags_get_first_value (klass, flags);
if (fl != NULL) {
tmp = g_strconcat (result, (first ? "" : "+"), fl->value_name, NULL);
g_free (result);
result = tmp;
first = FALSE;
/* clear flag */
flags &= ~fl->value;
}
}
g_type_class_unref (klass);
return result;
}
static gboolean
gst_value_gflags_str_to_flags (GFlagsClass * klass, const gchar * s,
guint * out_flags, guint * out_mask)
{
GFlagsValue *fl;
gchar delimiter;
const gchar *pos = NULL;
const gchar *next;
gchar *cur_str, *endptr;
guint flags = 0;
guint mask = 0;
guint val;
g_return_val_if_fail (klass, FALSE);
/* split into parts delimited with + or / and
* compose the set of flags and mask. */
pos = s;
if (*pos == '\0')
goto done; /* Empty string, nothing to do */
/* As a special case if the first char isn't a delimiter, assume
* it's a '+' - for GFlags strings, which don't start with a
* delimiter, while GFlagSet always will */
if (*pos == '/' || *pos == '+') {
delimiter = *pos;
pos++;
} else {
delimiter = '+';
}
do {
/* Find the next delimiter */
next = pos;
while (*next != '\0' && *next != '+' && *next != '/')
next++;
cur_str = g_strndup (pos, next - pos);
if ((fl = g_flags_get_value_by_name (klass, cur_str)))
val = fl->value;
else if ((fl = g_flags_get_value_by_nick (klass, cur_str)))
val = fl->value;
else {
val = strtoul (cur_str, &endptr, 0);
/* direct numeric value */
if (endptr == NULL || *endptr != '\0') {
g_free (cur_str);
return FALSE; /* Invalid numeric or string we can't convert */
}
}
g_free (cur_str);
if (val) {
mask |= val;
if (delimiter == '+')
flags |= val;
}
/* Advance to the next delimiter */
pos = next;
delimiter = *pos;
pos++;
} while (delimiter != '\0');
done:
if (out_flags)
*out_flags = flags;
if (out_mask)
*out_mask = mask;
return TRUE;
}
static gboolean
gst_value_deserialize_gflags (GValue * dest, const gchar * s)
{
GFlagsClass *klass = (GFlagsClass *) g_type_class_ref (G_VALUE_TYPE (dest));
gboolean res = FALSE;
guint flags = 0;
if (gst_value_gflags_str_to_flags (klass, s, &flags, NULL)) {
g_value_set_flags (dest, flags);
res = TRUE;
}
g_type_class_unref (klass);
return res;
}
/*********
* gtype *
*********/
static gint
gst_value_compare_gtype (const GValue * value1, const GValue * value2)
{
if (value1->data[0].v_pointer == value2->data[0].v_pointer)
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
static gchar *
gst_value_serialize_gtype (const GValue * value)
{
return g_strdup (g_type_name (g_value_get_gtype (value)));
}
static gboolean
gst_value_deserialize_gtype (GValue * dest, const gchar * s)
{
GType t = g_type_from_name (s);
gboolean ret = TRUE;
if (t == G_TYPE_INVALID)
ret = FALSE;
if (ret) {
g_value_set_gtype (dest, t);
}
return ret;
}
/****************
* subset *
****************/
static gboolean
gst_value_is_subset_int_range_int_range (const GValue * value1,
const GValue * value2)
{
gint gcd;
g_return_val_if_fail (GST_VALUE_HOLDS_INT_RANGE (value1), FALSE);
g_return_val_if_fail (GST_VALUE_HOLDS_INT_RANGE (value2), FALSE);
if (INT_RANGE_MIN (value1) * INT_RANGE_STEP (value1) <
INT_RANGE_MIN (value2) * INT_RANGE_STEP (value2))
return FALSE;
if (INT_RANGE_MAX (value1) * INT_RANGE_STEP (value1) >
INT_RANGE_MAX (value2) * INT_RANGE_STEP (value2))
return FALSE;
if (INT_RANGE_MIN (value2) == INT_RANGE_MAX (value2)) {
if ((INT_RANGE_MIN (value2) * INT_RANGE_STEP (value2)) %
INT_RANGE_STEP (value1))
return FALSE;
return TRUE;
}
gcd =
gst_util_greatest_common_divisor (INT_RANGE_STEP (value1),
INT_RANGE_STEP (value2));
if (gcd != MIN (INT_RANGE_STEP (value1), INT_RANGE_STEP (value2)))
return FALSE;
return TRUE;
}
static gboolean
gst_value_is_subset_int64_range_int64_range (const GValue * value1,
const GValue * value2)
{
gint64 gcd;
g_return_val_if_fail (GST_VALUE_HOLDS_INT64_RANGE (value1), FALSE);
g_return_val_if_fail (GST_VALUE_HOLDS_INT64_RANGE (value2), FALSE);
if (INT64_RANGE_MIN (value1) < INT64_RANGE_MIN (value2))
return FALSE;
if (INT64_RANGE_MAX (value1) > INT64_RANGE_MAX (value2))
return FALSE;
if (INT64_RANGE_MIN (value2) == INT64_RANGE_MAX (value2)) {
if ((INT64_RANGE_MIN (value2) * INT64_RANGE_STEP (value2)) %
INT64_RANGE_STEP (value1))
return FALSE;
return TRUE;
}
gcd =
gst_util_greatest_common_divisor_int64 (INT64_RANGE_STEP (value1),
INT64_RANGE_STEP (value2));
if (gcd != MIN (INT64_RANGE_STEP (value1), INT64_RANGE_STEP (value2)))
return FALSE;
return TRUE;
}
/* A flag set is a subset of another if the superset allows the
* flags of the subset */
static gboolean
gst_value_is_subset_flagset_flagset (const GValue * value1,
const GValue * value2)
{
guint f1, f2;
guint m1, m2;
g_return_val_if_fail (GST_VALUE_HOLDS_FLAG_SET (value1), FALSE);
g_return_val_if_fail (GST_VALUE_HOLDS_FLAG_SET (value2), FALSE);
f1 = value1->data[0].v_uint;
f2 = value2->data[0].v_uint;
m1 = value1->data[1].v_uint;
m2 = value2->data[1].v_uint;
/* Not a subset if masked bits of superset disagree */
if ((f1 & m1) != (f2 & (m1 & m2)))
return FALSE;
return TRUE;
}
static gboolean
gst_value_is_subset_structure_structure (const GValue * value1,
const GValue * value2)
{
const GstStructure *s1, *s2;
g_return_val_if_fail (GST_VALUE_HOLDS_STRUCTURE (value1), FALSE);
g_return_val_if_fail (GST_VALUE_HOLDS_STRUCTURE (value2), FALSE);
s1 = gst_value_get_structure (value1);
s2 = gst_value_get_structure (value2);
return gst_structure_is_subset (s1, s2);
}
static gboolean
gst_value_is_subset_list_list (const GValue * value1, const GValue * value2)
{
GstValueList *vlist1 = VALUE_LIST_ARRAY (value1);
GstValueList *vlist2 = VALUE_LIST_ARRAY (value2);
gint it1, len1, it2, len2;
len1 = vlist1->len;
len2 = vlist2->len;
/* A list can't be a subset of a smaller list */
if (len1 > len2)
return FALSE;
/* Check if all elements of the first list are within the 2nd list */
for (it1 = 0; it1 < len1; it1++) {
const GValue *child1 = &vlist1->fields[it1];
gboolean seen = FALSE;
for (it2 = 0; it2 < len2; it2++) {
const GValue *child2 = &vlist2->fields[it2];
if (gst_value_compare (child1, child2) == GST_VALUE_EQUAL) {
seen = TRUE;
break;
}
}
if (!seen)
return FALSE;
}
return TRUE;
}
/**
* gst_value_is_subset:
* @value1: a #GValue
* @value2: a #GValue
*
* Check that @value1 is a subset of @value2.
*
* Return: %TRUE is @value1 is a subset of @value2
*/
gboolean
gst_value_is_subset (const GValue * value1, const GValue * value2)
{
/* special case for int/int64 ranges, since we cannot compute
the difference for those when they have different steps,
and it's actually a lot simpler to compute whether a range
is a subset of another. */
if (GST_VALUE_HOLDS_INT_RANGE (value1) && GST_VALUE_HOLDS_INT_RANGE (value2)) {
return gst_value_is_subset_int_range_int_range (value1, value2);
} else if (GST_VALUE_HOLDS_INT64_RANGE (value1)
&& GST_VALUE_HOLDS_INT64_RANGE (value2)) {
return gst_value_is_subset_int64_range_int64_range (value1, value2);
} else if (GST_VALUE_HOLDS_FLAG_SET (value1) &&
GST_VALUE_HOLDS_FLAG_SET (value2)) {
return gst_value_is_subset_flagset_flagset (value1, value2);
} else if (GST_VALUE_HOLDS_STRUCTURE (value1)
&& GST_VALUE_HOLDS_STRUCTURE (value2)) {
return gst_value_is_subset_structure_structure (value1, value2);
} else if (GST_VALUE_HOLDS_LIST (value1) && GST_VALUE_HOLDS_LIST (value2)) {
return gst_value_is_subset_list_list (value1, value2);
}
/*
* 1 - [1,2] = empty
* -> !subset
*
* [1,2] - 1 = 2
* -> 1 - [1,2] = empty
* -> subset
*
* [1,3] - [1,2] = 3
* -> [1,2] - [1,3] = empty
* -> subset
*
* {1,2} - {1,3} = 2
* -> {1,3} - {1,2} = 3
* -> !subset
*
* First caps subtraction needs to return a non-empty set, second
* subtractions needs to give en empty set.
* Both substractions are switched below, as it's faster that way.
*/
if (!gst_value_subtract (NULL, value1, value2)) {
if (gst_value_subtract (NULL, value2, value1)) {
return TRUE;
}
}
return FALSE;
}
/*********
* union *
*********/
static gboolean
gst_value_union_int_int_range (GValue * dest, const GValue * src1,
const GValue * src2)
{
gint v = src1->data[0].v_int;
/* check if it's already in the range */
if (INT_RANGE_MIN (src2) * INT_RANGE_STEP (src2) <= v &&
INT_RANGE_MAX (src2) * INT_RANGE_STEP (src2) >= v &&
v % INT_RANGE_STEP (src2) == 0) {
if (dest)
gst_value_init_and_copy (dest, src2);
return TRUE;
}
/* check if it extends the range */
if (v == (INT_RANGE_MIN (src2) - 1) * INT_RANGE_STEP (src2)) {
if (dest) {
guint64 new_min = INT_RANGE_MIN (src2) - 1;
guint64 new_max = INT_RANGE_MAX (src2);
gst_value_init_and_copy (dest, src2);
dest->data[0].v_uint64 = (new_min << 32) | (new_max);
}
return TRUE;
}
if (v == (INT_RANGE_MAX (src2) + 1) * INT_RANGE_STEP (src2)) {
if (dest) {
guint64 new_min = INT_RANGE_MIN (src2);
guint64 new_max = INT_RANGE_MAX (src2) + 1;
gst_value_init_and_copy (dest, src2);
dest->data[0].v_uint64 = (new_min << 32) | (new_max);
}
return TRUE;
}
return FALSE;
}
static gboolean
gst_value_union_int_range_int_range (GValue * dest, const GValue * src1,
const GValue * src2)
{
/* We can union in several special cases:
1 - one is a subset of another
2 - same step and not disjoint
3 - different step, at least one with one value which matches a 'next' or 'previous'
- anything else ?
*/
/* 1 - subset */
if (gst_value_is_subset_int_range_int_range (src1, src2)) {
if (dest)
gst_value_init_and_copy (dest, src2);
return TRUE;
}
if (gst_value_is_subset_int_range_int_range (src2, src1)) {
if (dest)
gst_value_init_and_copy (dest, src1);
return TRUE;
}
/* 2 - same step and not disjoint */
if (INT_RANGE_STEP (src1) == INT_RANGE_STEP (src2)) {
if ((INT_RANGE_MIN (src1) <= INT_RANGE_MAX (src2) + 1 &&
INT_RANGE_MAX (src1) >= INT_RANGE_MIN (src2) - 1) ||
(INT_RANGE_MIN (src2) <= INT_RANGE_MAX (src1) + 1 &&
INT_RANGE_MAX (src2) >= INT_RANGE_MIN (src1) - 1)) {
if (dest) {
gint step = INT_RANGE_STEP (src1);
gint min = step * MIN (INT_RANGE_MIN (src1), INT_RANGE_MIN (src2));
gint max = step * MAX (INT_RANGE_MAX (src1), INT_RANGE_MAX (src2));
g_value_init (dest, GST_TYPE_INT_RANGE);
gst_value_set_int_range_step (dest, min, max, step);
}
return TRUE;
}
}
/* 3 - single value matches next or previous */
if (INT_RANGE_STEP (src1) != INT_RANGE_STEP (src2)) {
gint n1 = INT_RANGE_MAX (src1) - INT_RANGE_MIN (src1) + 1;
gint n2 = INT_RANGE_MAX (src2) - INT_RANGE_MIN (src2) + 1;
if (n1 == 1 || n2 == 1) {
const GValue *range_value = NULL;
gint scalar = 0;
if (n1 == 1) {
range_value = src2;
scalar = INT_RANGE_MIN (src1) * INT_RANGE_STEP (src1);
} else if (n2 == 1) {
range_value = src1;
scalar = INT_RANGE_MIN (src2) * INT_RANGE_STEP (src2);
}
if (scalar ==
(INT_RANGE_MIN (range_value) - 1) * INT_RANGE_STEP (range_value)) {
if (dest) {
guint64 new_min = (guint)
((INT_RANGE_MIN (range_value) -
1) * INT_RANGE_STEP (range_value));
guint64 new_max = (guint)
(INT_RANGE_MAX (range_value) * INT_RANGE_STEP (range_value));
gst_value_init_and_copy (dest, range_value);
dest->data[0].v_uint64 = (new_min << 32) | (new_max);
}
return TRUE;
} else if (scalar ==
(INT_RANGE_MAX (range_value) + 1) * INT_RANGE_STEP (range_value)) {
if (dest) {
guint64 new_min = (guint)
(INT_RANGE_MIN (range_value) * INT_RANGE_STEP (range_value));
guint64 new_max = (guint)
((INT_RANGE_MAX (range_value) +
1) * INT_RANGE_STEP (range_value));
gst_value_init_and_copy (dest, range_value);
dest->data[0].v_uint64 = (new_min << 32) | (new_max);
}
return TRUE;
}
}
}
/* If we get there, we did not find a way to make a union that can be
represented with our simplistic model. */
return FALSE;
}
static gboolean
gst_value_union_flagset_flagset (GValue * dest, const GValue * src1,
const GValue * src2)
{
/* We can union 2 flag sets where they do not disagree on
* required (masked) flag bits */
guint64 f1, f2;
guint64 m1, m2;
g_return_val_if_fail (GST_VALUE_HOLDS_FLAG_SET (src1), FALSE);
g_return_val_if_fail (GST_VALUE_HOLDS_FLAG_SET (src2), FALSE);
f1 = src1->data[0].v_uint;
f2 = src2->data[0].v_uint;
m1 = src1->data[1].v_uint;
m2 = src2->data[1].v_uint;
/* Can't union if masked bits disagree */
if ((f1 & (m1 & m2)) != (f2 & (m1 & m2)))
return FALSE;
if (dest) {
g_value_init (dest, GST_TYPE_FLAG_SET);
/* Copy masked bits from src2 to src1 */
f1 &= ~m2;
f1 |= (f2 & m2);
m1 |= m2;
gst_value_set_flagset (dest, f1, m1);
}
return TRUE;
}
/* iterating over the result taking the union with the other structure's value */
static gboolean
structure_field_union_into (GQuark field_id, GValue * val, gpointer user_data)
{
GstStructure *other = user_data;
const GValue *other_value;
GValue res_value = G_VALUE_INIT;
other_value = gst_structure_id_get_value (other, field_id);
/* no value in the other struct, just keep this value */
if (!other_value)
return TRUE;
if (!gst_value_union (&res_value, val, other_value))
return FALSE;
g_value_unset (val);
gst_value_move (val, &res_value);
return TRUE;
}
/* iterating over the other source structure adding missing values */
static gboolean
structure_field_union_from (GQuark field_id, const GValue * other_val,
gpointer user_data)
{
GstStructure *result = user_data;
const GValue *result_value;
result_value = gst_structure_id_get_value (result, field_id);
if (!result_value)
gst_structure_id_set_value (result, field_id, other_val);
return TRUE;
}
static gboolean
gst_value_union_structure_structure (GValue * dest, const GValue * src1,
const GValue * src2)
{
const GstStructure *s1, *s2;
GstStructure *result;
gboolean ret;
g_return_val_if_fail (GST_VALUE_HOLDS_STRUCTURE (src1), FALSE);
g_return_val_if_fail (GST_VALUE_HOLDS_STRUCTURE (src2), FALSE);
s1 = gst_value_get_structure (src1);
s2 = gst_value_get_structure (src2);
/* Can't join two structures with different names into a single structure */
if (!gst_structure_has_name (s1, gst_structure_get_name (s2))) {
gst_value_list_concat (dest, src1, src2);
return TRUE;
}
result = gst_structure_copy (s1);
ret =
gst_structure_map_in_place (result, structure_field_union_into,
(gpointer) s2);
if (!ret)
goto out;
ret =
gst_structure_foreach (s2, structure_field_union_from, (gpointer) result);
if (ret) {
g_value_init (dest, GST_TYPE_STRUCTURE);
gst_value_set_structure (dest, result);
}
out:
gst_structure_free (result);
return ret;
}
/****************
* intersection *
****************/
static gboolean
gst_value_intersect_int_int_range (GValue * dest, const GValue * src1,
const GValue * src2)
{
if (INT_RANGE_MIN (src2) * INT_RANGE_STEP (src2) <= src1->data[0].v_int &&
INT_RANGE_MAX (src2) * INT_RANGE_STEP (src2) >= src1->data[0].v_int &&
src1->data[0].v_int % INT_RANGE_STEP (src2) == 0) {
if (dest)
gst_value_init_and_copy (dest, src1);
return TRUE;
}
return FALSE;
}
static gboolean
gst_value_intersect_int_range_int_range (GValue * dest, const GValue * src1,
const GValue * src2)
{
gint min;
gint max;
gint step;
step =
INT_RANGE_STEP (src1) /
gst_util_greatest_common_divisor (INT_RANGE_STEP (src1),
INT_RANGE_STEP (src2));
if (G_MAXINT32 / INT_RANGE_STEP (src2) < step)
return FALSE;
step *= INT_RANGE_STEP (src2);
min =
MAX (INT_RANGE_MIN (src1) * INT_RANGE_STEP (src1),
INT_RANGE_MIN (src2) * INT_RANGE_STEP (src2));
min = (min + step - 1) / step * step;
max =
MIN (INT_RANGE_MAX (src1) * INT_RANGE_STEP (src1),
INT_RANGE_MAX (src2) * INT_RANGE_STEP (src2));
max = max / step * step;
if (min < max) {
if (dest) {
g_value_init (dest, GST_TYPE_INT_RANGE);
gst_value_set_int_range_step (dest, min, max, step);
}
return TRUE;
}
if (min == max) {
if (dest) {
g_value_init (dest, G_TYPE_INT);
g_value_set_int (dest, min);
}
return TRUE;
}
return FALSE;
}
#define INT64_RANGE_MIN_VAL(v) (INT64_RANGE_MIN (v) * INT64_RANGE_STEP (v))
#define INT64_RANGE_MAX_VAL(v) (INT64_RANGE_MAX (v) * INT64_RANGE_STEP (v))
static gboolean
gst_value_intersect_int64_int64_range (GValue * dest, const GValue * src1,
const GValue * src2)
{
if (INT64_RANGE_MIN_VAL (src2) <= src1->data[0].v_int64 &&
INT64_RANGE_MAX_VAL (src2) >= src1->data[0].v_int64 &&
src1->data[0].v_int64 % INT64_RANGE_STEP (src2) == 0) {
if (dest)
gst_value_init_and_copy (dest, src1);
return TRUE;
}
return FALSE;
}
static gboolean
gst_value_intersect_int64_range_int64_range (GValue * dest, const GValue * src1,
const GValue * src2)
{
gint64 min;
gint64 max;
gint64 step;
step =
INT64_RANGE_STEP (src1) /
gst_util_greatest_common_divisor_int64 (INT64_RANGE_STEP (src1),
INT64_RANGE_STEP (src2));
if (G_MAXINT64 / INT64_RANGE_STEP (src2) < step)
return FALSE;
step *= INT64_RANGE_STEP (src2);
min =
MAX (INT64_RANGE_MIN (src1) * INT64_RANGE_STEP (src1),
INT64_RANGE_MIN (src2) * INT64_RANGE_STEP (src2));
min = (min + step - 1) / step * step;
max =
MIN (INT64_RANGE_MAX (src1) * INT64_RANGE_STEP (src1),
INT64_RANGE_MAX (src2) * INT64_RANGE_STEP (src2));
max = max / step * step;
if (min < max) {
if (dest) {
g_value_init (dest, GST_TYPE_INT64_RANGE);
gst_value_set_int64_range_step (dest, min, max, step);
}
return TRUE;
}
if (min == max) {
if (dest) {
g_value_init (dest, G_TYPE_INT64);
g_value_set_int64 (dest, min);
}
return TRUE;
}
return FALSE;
}
static gboolean
gst_value_intersect_double_double_range (GValue * dest, const GValue * src1,
const GValue * src2)
{
if (src2->data[0].v_double <= src1->data[0].v_double &&
src2->data[1].v_double >= src1->data[0].v_double) {
if (dest)
gst_value_init_and_copy (dest, src1);
return TRUE;
}
return FALSE;
}
static gboolean
gst_value_intersect_double_range_double_range (GValue * dest,
const GValue * src1, const GValue * src2)
{
gdouble min;
gdouble max;
min = MAX (src1->data[0].v_double, src2->data[0].v_double);
max = MIN (src1->data[1].v_double, src2->data[1].v_double);
if (min < max) {
if (dest) {
g_value_init (dest, GST_TYPE_DOUBLE_RANGE);
gst_value_set_double_range (dest, min, max);
}
return TRUE;
}
if (min == max) {
if (dest) {
g_value_init (dest, G_TYPE_DOUBLE);
g_value_set_int (dest, (int) min);
}
return TRUE;
}
return FALSE;
}
static gboolean
gst_value_intersect_list_list (GValue * dest, const GValue * value1,
const GValue * value2)
{
guint8 tmpfield[16]; /* Check up to 128 values */
guint8 *bitfield;
gboolean alloc_bitfield = FALSE;
gboolean res = FALSE;
GValue *tmp;
GType type1, type2;
guint it1, len1, it2, len2, itar;
GstValueList *vlist = NULL;
/* If they don't have the same basic type, all bets are off :) */
if (!gst_value_list_or_array_get_basic_type (value1, &type1) ||
!gst_value_list_or_array_get_basic_type (value2, &type2) ||
type1 != type2)
return FALSE;
len1 = VALUE_LIST_SIZE (value1);
len2 = VALUE_LIST_SIZE (value2);
/* Fast-path with no dest (i.e. only interested in knowing whether
* both lists intersected without wanting the result) */
if (!dest) {
for (it1 = 0; it1 < len1; it1++) {
const GValue *item1 = VALUE_LIST_GET_VALUE (value1, it1);
for (it2 = 0; it2 < len2; it2++) {
const GValue *item2 = VALUE_LIST_GET_VALUE (value2, it2);
if (gst_value_intersect (NULL, item1, item2)) {
res = TRUE;
goto beach;
}
}
}
goto beach;
}
#define is_visited(idx) (bitfield[(idx) >> 3] & (1 << ((idx) & 0x7)))
#define mark_visited(idx) (bitfield[(idx) >> 3] |= (1 << ((idx) & 0x7)))
/* Bitfield to avoid double-visiting */
if (G_UNLIKELY (len2 > 128)) {
alloc_bitfield = TRUE;
bitfield = g_malloc0 ((len2 / 8) + 1);
GST_CAT_LOG (GST_CAT_PERFORMANCE,
"Allocation for GstValueList with more than 128 members");
} else {
bitfield = &tmpfield[0];
memset (bitfield, 0, 16);
}
/* When doing list<->list intersections, there is a greater
* probability of ending up with a list than with a single value.
* Furthermore, the biggest that list can be will the smallest list
* (i.e. intersects fully).
* Therefore we pre-allocate a GstValueList of that size. */
vlist = _gst_value_list_new (MIN (len1, len2));
itar = 0;
tmp = &vlist->fields[0];
for (it1 = 0; it1 < len1; it1++) {
const GValue *item1 = VALUE_LIST_GET_VALUE (value1, it1);
for (it2 = 0; it2 < len2; it2++) {
const GValue *item2;
if (is_visited (it2))
continue;
item2 = VALUE_LIST_GET_VALUE (value2, it2);
if (gst_value_intersect (tmp, item1, item2)) {
res = TRUE;
mark_visited (it2);
/* Move our collection value */
itar += 1;
tmp = &vlist->fields[itar];
vlist->len += 1;
/* We can stop iterating the second part now that we've matched */
break;
}
}
}
#undef is_visited
#undef mark_visited
if (res) {
/* If we end up with a single value in the list, just use that
* value. Else use the list */
if (vlist->len == 1) {
gst_value_move (dest, &vlist->fields[0]);
g_free (vlist);
} else {
dest->g_type = GST_TYPE_LIST;
dest->data[0].v_pointer = vlist;
}
} else {
g_free (vlist);
}
beach:
if (alloc_bitfield)
g_free (bitfield);
return res;
}
static gboolean
gst_value_intersect_list (GValue * dest, const GValue * value1,
const GValue * value2)
{
guint i, size;
GValue intersection = { 0, };
gboolean ret = FALSE;
/* Use optimized list-list intersection */
if (G_VALUE_TYPE (value2) == GST_TYPE_LIST) {
return gst_value_intersect_list_list (dest, value1, value2);
}
size = VALUE_LIST_SIZE (value1);
for (i = 0; i < size; i++) {
const GValue *cur = VALUE_LIST_GET_VALUE (value1, i);
/* quicker version when we don't need the resulting set */
if (!dest) {
if (gst_value_intersect (NULL, cur, value2)) {
ret = TRUE;
break;
}
continue;
}
if (gst_value_intersect (&intersection, cur, value2)) {
/* append value */
if (!ret) {
gst_value_move (dest, &intersection);
ret = TRUE;
} else if (GST_VALUE_HOLDS_LIST (dest)) {
_gst_value_list_append_and_take_value (dest, &intersection);
} else {
GValue temp;
gst_value_move (&temp, dest);
gst_value_list_merge (dest, &temp, &intersection);
g_value_unset (&temp);
g_value_unset (&intersection);
}
}
}
return ret;
}
static gboolean
gst_value_intersect_array (GValue * dest, const GValue * src1,
const GValue * src2)
{
guint size;
guint n;
GValue val = { 0 };
/* only works on similar-sized arrays */
size = gst_value_array_get_size (src1);
if (size != gst_value_array_get_size (src2))
return FALSE;
/* quicker value when we don't need the resulting set */
if (!dest) {
for (n = 0; n < size; n++) {
if (!gst_value_intersect (NULL, gst_value_array_get_value (src1, n),
gst_value_array_get_value (src2, n))) {
return FALSE;
}
}
return TRUE;
}
g_value_init (dest, GST_TYPE_ARRAY);
for (n = 0; n < size; n++) {
if (!gst_value_intersect (&val, gst_value_array_get_value (src1, n),
gst_value_array_get_value (src2, n))) {
g_value_unset (dest);
return FALSE;
}
_gst_value_array_append_and_take_value (dest, &val);
}
return TRUE;
}
static gboolean
gst_value_intersect_fraction_fraction_range (GValue * dest, const GValue * src1,
const GValue * src2)
{
gint res1, res2;
GValue *vals;
GstValueCompareFunc compare;
vals = src2->data[0].v_pointer;
if (vals == NULL)
return FALSE;
if ((compare = gst_value_get_compare_func (src1))) {
res1 = gst_value_compare_with_func (&vals[0], src1, compare);
res2 = gst_value_compare_with_func (&vals[1], src1, compare);
if ((res1 == GST_VALUE_EQUAL || res1 == GST_VALUE_LESS_THAN) &&
(res2 == GST_VALUE_EQUAL || res2 == GST_VALUE_GREATER_THAN)) {
if (dest)
gst_value_init_and_copy (dest, src1);
return TRUE;
}
}
return FALSE;
}
static gboolean
gst_value_intersect_fraction_range_fraction_range (GValue * dest,
const GValue * src1, const GValue * src2)
{
GValue *min;
GValue *max;
gint res;
GValue *vals1, *vals2;
GstValueCompareFunc compare;
vals1 = src1->data[0].v_pointer;
vals2 = src2->data[0].v_pointer;
g_return_val_if_fail (vals1 != NULL && vals2 != NULL, FALSE);
if ((compare = gst_value_get_compare_func (&vals1[0]))) {
/* min = MAX (src1.start, src2.start) */
res = gst_value_compare_with_func (&vals1[0], &vals2[0], compare);
g_return_val_if_fail (res != GST_VALUE_UNORDERED, FALSE);
if (res == GST_VALUE_LESS_THAN)
min = &vals2[0]; /* Take the max of the 2 */
else
min = &vals1[0];
/* max = MIN (src1.end, src2.end) */
res = gst_value_compare_with_func (&vals1[1], &vals2[1], compare);
g_return_val_if_fail (res != GST_VALUE_UNORDERED, FALSE);
if (res == GST_VALUE_GREATER_THAN)
max = &vals2[1]; /* Take the min of the 2 */
else
max = &vals1[1];
res = gst_value_compare_with_func (min, max, compare);
g_return_val_if_fail (res != GST_VALUE_UNORDERED, FALSE);
if (res == GST_VALUE_LESS_THAN) {
if (dest) {
g_value_init (dest, GST_TYPE_FRACTION_RANGE);
vals1 = dest->data[0].v_pointer;
g_value_copy (min, &vals1[0]);
g_value_copy (max, &vals1[1]);
}
return TRUE;
}
if (res == GST_VALUE_EQUAL) {
if (dest)
gst_value_init_and_copy (dest, min);
return TRUE;
}
}
return FALSE;
}
/* Two flagsets intersect if the masked bits in both
* flagsets are exactly equal */
static gboolean
gst_value_intersect_flagset_flagset (GValue * dest,
const GValue * src1, const GValue * src2)
{
guint f1, f2;
guint m1, m2;
GType type1, type2, flagset_type;
g_return_val_if_fail (GST_VALUE_HOLDS_FLAG_SET (src1), FALSE);
g_return_val_if_fail (GST_VALUE_HOLDS_FLAG_SET (src2), FALSE);
f1 = src1->data[0].v_uint;
f2 = src2->data[0].v_uint;
m1 = src1->data[1].v_uint;
m2 = src2->data[1].v_uint;
/* Don't intersect if masked bits disagree */
if ((f1 & (m1 & m2)) != (f2 & (m1 & m2)))
return FALSE;
/* Allow intersection with the generic FlagSet type, on one
* side, but not 2 different subtypes - that makes no sense */
type1 = G_VALUE_TYPE (src1);
type2 = G_VALUE_TYPE (src2);
flagset_type = GST_TYPE_FLAG_SET;
if (type1 != type2 && type1 != flagset_type && type2 != flagset_type)
return FALSE;
if (dest) {
GType dest_type;
/* Prefer an output type that matches a sub-type,
* rather than the generic type */
if (type1 != flagset_type)
dest_type = type1;
else
dest_type = type2;
g_value_init (dest, dest_type);
/* The compatible set is all the bits from src1 that it
* cares about and all the bits from src2 that it cares
* about. */
dest->data[0].v_uint = (f1 & m1) | (f2 & m2);
dest->data[1].v_uint = m1 | m2;
}
return TRUE;
}
static gboolean
gst_value_intersect_structure_structure (GValue * dest,
const GValue * src1, const GValue * src2)
{
const GstStructure *s1, *s2;
GstStructure *d1;
s1 = gst_value_get_structure (src1);
s2 = gst_value_get_structure (src2);
d1 = gst_structure_intersect (s1, s2);
if (!d1)
return FALSE;
if (dest) {
g_value_init (dest, GST_TYPE_STRUCTURE);
gst_value_set_structure (dest, d1);
}
gst_structure_free (d1);
return TRUE;
}
/***************
* subtraction *
***************/
static gboolean
gst_value_subtract_int_int_range (GValue * dest, const GValue * minuend,
const GValue * subtrahend)
{
gint min = gst_value_get_int_range_min (subtrahend);
gint max = gst_value_get_int_range_max (subtrahend);
gint step = gst_value_get_int_range_step (subtrahend);
gint val = g_value_get_int (minuend);
if (step == 0)
return FALSE;
/* subtracting a range from an int only works if the int is not in the
* range */
if (val < min || val > max || val % step) {
/* and the result is the int */
if (dest)
gst_value_init_and_copy (dest, minuend);
return TRUE;
}
return FALSE;
}
/* creates a new int range based on input values.
*/
static gboolean
gst_value_create_new_range (GValue * dest, gint min1, gint max1, gint min2,
gint max2, gint step)
{
GValue v1 = { 0, };
GValue v2 = { 0, };
GValue *pv1, *pv2; /* yeah, hungarian! */
g_return_val_if_fail (step > 0, FALSE);
g_return_val_if_fail (min1 % step == 0, FALSE);
g_return_val_if_fail (max1 % step == 0, FALSE);
g_return_val_if_fail (min2 % step == 0, FALSE);
g_return_val_if_fail (max2 % step == 0, FALSE);
if (min1 <= max1 && min2 <= max2) {
pv1 = &v1;
pv2 = &v2;
} else if (min1 <= max1) {
pv1 = dest;
pv2 = NULL;
} else if (min2 <= max2) {
pv1 = NULL;
pv2 = dest;
} else {
return FALSE;
}
if (!dest)
return TRUE;
if (min1 < max1) {
g_value_init (pv1, GST_TYPE_INT_RANGE);
gst_value_set_int_range_step (pv1, min1, max1, step);
} else if (min1 == max1) {
g_value_init (pv1, G_TYPE_INT);
g_value_set_int (pv1, min1);
}
if (min2 < max2) {
g_value_init (pv2, GST_TYPE_INT_RANGE);
gst_value_set_int_range_step (pv2, min2, max2, step);
} else if (min2 == max2) {
g_value_init (pv2, G_TYPE_INT);
g_value_set_int (pv2, min2);
}
if (min1 <= max1 && min2 <= max2) {
gst_value_list_concat_and_take_values (dest, pv1, pv2);
}
return TRUE;
}
static gboolean
gst_value_subtract_int_range_int (GValue * dest, const GValue * minuend,
const GValue * subtrahend)
{
gint min = gst_value_get_int_range_min (minuend);
gint max = gst_value_get_int_range_max (minuend);
gint step = gst_value_get_int_range_step (minuend);
gint val = g_value_get_int (subtrahend);
g_return_val_if_fail (min < max, FALSE);
if (step == 0)
return FALSE;
/* value is outside of the range, return range unchanged */
if (val < min || val > max || val % step) {
if (dest)
gst_value_init_and_copy (dest, minuend);
return TRUE;
} else {
/* max must be MAXINT too as val <= max */
if (val >= G_MAXINT - step + 1) {
max -= step;
val -= step;
}
/* min must be MININT too as val >= max */
if (val <= G_MININT + step - 1) {
min += step;
val += step;
}
if (dest)
gst_value_create_new_range (dest, min, val - step, val + step, max, step);
}
return TRUE;
}
static gboolean
gst_value_subtract_int_range_int_range (GValue * dest, const GValue * minuend,
const GValue * subtrahend)
{
gint min1 = gst_value_get_int_range_min (minuend);
gint max1 = gst_value_get_int_range_max (minuend);
gint step1 = gst_value_get_int_range_step (minuend);
gint min2 = gst_value_get_int_range_min (subtrahend);
gint max2 = gst_value_get_int_range_max (subtrahend);
gint step2 = gst_value_get_int_range_step (subtrahend);
gint step;
if (step1 != step2) {
/* ENOIMPL */
g_assert (FALSE);
return FALSE;
}
step = step1;
if (step == 0)
return FALSE;
if (max2 >= max1 && min2 <= min1) {
return FALSE;
} else if (max2 >= max1) {
return gst_value_create_new_range (dest, min1, MIN (min2 - step, max1),
step, 0, step);
} else if (min2 <= min1) {
return gst_value_create_new_range (dest, MAX (max2 + step, min1), max1,
step, 0, step);
} else {
return gst_value_create_new_range (dest, min1, MIN (min2 - step, max1),
MAX (max2 + step, min1), max1, step);
}
}
static gboolean
gst_value_subtract_int64_int64_range (GValue * dest, const GValue * minuend,
const GValue * subtrahend)
{
gint64 min = gst_value_get_int64_range_min (subtrahend);
gint64 max = gst_value_get_int64_range_max (subtrahend);
gint64 step = gst_value_get_int64_range_step (subtrahend);
gint64 val = g_value_get_int64 (minuend);
if (step == 0)
return FALSE;
/* subtracting a range from an int64 only works if the int64 is not in the
* range */
if (val < min || val > max || val % step) {
/* and the result is the int64 */
if (dest)
gst_value_init_and_copy (dest, minuend);
return TRUE;
}
return FALSE;
}
/* creates a new int64 range based on input values.
*/
static gboolean
gst_value_create_new_int64_range (GValue * dest, gint64 min1, gint64 max1,
gint64 min2, gint64 max2, gint64 step)
{
GValue v1 = { 0, };
GValue v2 = { 0, };
GValue *pv1, *pv2; /* yeah, hungarian! */
g_return_val_if_fail (step > 0, FALSE);
g_return_val_if_fail (min1 % step == 0, FALSE);
g_return_val_if_fail (max1 % step == 0, FALSE);
g_return_val_if_fail (min2 % step == 0, FALSE);
g_return_val_if_fail (max2 % step == 0, FALSE);
if (min1 <= max1 && min2 <= max2) {
pv1 = &v1;
pv2 = &v2;
} else if (min1 <= max1) {
pv1 = dest;
pv2 = NULL;
} else if (min2 <= max2) {
pv1 = NULL;
pv2 = dest;
} else {
return FALSE;
}
if (!dest)
return TRUE;
if (min1 < max1) {
g_value_init (pv1, GST_TYPE_INT64_RANGE);
gst_value_set_int64_range_step (pv1, min1, max1, step);
} else if (min1 == max1) {
g_value_init (pv1, G_TYPE_INT64);
g_value_set_int64 (pv1, min1);
}
if (min2 < max2) {
g_value_init (pv2, GST_TYPE_INT64_RANGE);
gst_value_set_int64_range_step (pv2, min2, max2, step);
} else if (min2 == max2) {
g_value_init (pv2, G_TYPE_INT64);
g_value_set_int64 (pv2, min2);
}
if (min1 <= max1 && min2 <= max2) {
gst_value_list_concat_and_take_values (dest, pv1, pv2);
}
return TRUE;
}
static gboolean
gst_value_subtract_int64_range_int64 (GValue * dest, const GValue * minuend,
const GValue * subtrahend)
{
gint64 min = gst_value_get_int64_range_min (minuend);
gint64 max = gst_value_get_int64_range_max (minuend);
gint64 step = gst_value_get_int64_range_step (minuend);
gint64 val = g_value_get_int64 (subtrahend);
g_return_val_if_fail (min < max, FALSE);
if (step == 0)
return FALSE;
/* value is outside of the range, return range unchanged */
if (val < min || val > max || val % step) {
if (dest)
gst_value_init_and_copy (dest, minuend);
return TRUE;
} else {
/* max must be MAXINT64 too as val <= max */
if (val >= G_MAXINT64 - step + 1) {
max -= step;
val -= step;
}
/* min must be MININT64 too as val >= max */
if (val <= G_MININT64 + step - 1) {
min += step;
val += step;
}
if (dest)
gst_value_create_new_int64_range (dest, min, val - step, val + step, max,
step);
}
return TRUE;
}
static gboolean
gst_value_subtract_int64_range_int64_range (GValue * dest,
const GValue * minuend, const GValue * subtrahend)
{
gint64 min1 = gst_value_get_int64_range_min (minuend);
gint64 max1 = gst_value_get_int64_range_max (minuend);
gint64 step1 = gst_value_get_int64_range_step (minuend);
gint64 min2 = gst_value_get_int64_range_min (subtrahend);
gint64 max2 = gst_value_get_int64_range_max (subtrahend);
gint64 step2 = gst_value_get_int64_range_step (subtrahend);
gint64 step;
if (step1 != step2) {
/* ENOIMPL */
g_assert (FALSE);
return FALSE;
}
if (step1 == 0)
return FALSE;
step = step1;
if (max2 >= max1 && min2 <= min1) {
return FALSE;
} else if (max2 >= max1) {
return gst_value_create_new_int64_range (dest, min1, MIN (min2 - step,
max1), step, 0, step);
} else if (min2 <= min1) {
return gst_value_create_new_int64_range (dest, MAX (max2 + step, min1),
max1, step, 0, step);
} else {
return gst_value_create_new_int64_range (dest, min1, MIN (min2 - step,
max1), MAX (max2 + step, min1), max1, step);
}
}
static gboolean
gst_value_subtract_double_double_range (GValue * dest, const GValue * minuend,
const GValue * subtrahend)
{
gdouble min = gst_value_get_double_range_min (subtrahend);
gdouble max = gst_value_get_double_range_max (subtrahend);
gdouble val = g_value_get_double (minuend);
if (val < min || val > max) {
if (dest)
gst_value_init_and_copy (dest, minuend);
return TRUE;
}
return FALSE;
}
static gboolean
gst_value_subtract_double_range_double (GValue * dest, const GValue * minuend,
const GValue * subtrahend)
{
/* since we don't have open ranges, we cannot create a hole in
* a double range. We return the original range */
if (dest)
gst_value_init_and_copy (dest, minuend);
return TRUE;
}
static gboolean
gst_value_subtract_double_range_double_range (GValue * dest,
const GValue * minuend, const GValue * subtrahend)
{
/* since we don't have open ranges, we have to approximate */
/* done like with ints */
gdouble min1 = gst_value_get_double_range_min (minuend);
gdouble max2 = gst_value_get_double_range_max (minuend);
gdouble max1 = MIN (gst_value_get_double_range_min (subtrahend), max2);
gdouble min2 = MAX (gst_value_get_double_range_max (subtrahend), min1);
GValue v1 = { 0, };
GValue v2 = { 0, };
GValue *pv1, *pv2; /* yeah, hungarian! */
if (min1 < max1 && min2 < max2) {
pv1 = &v1;
pv2 = &v2;
} else if (min1 < max1) {
pv1 = dest;
pv2 = NULL;
} else if (min2 < max2) {
pv1 = NULL;
pv2 = dest;
} else {
return FALSE;
}
if (!dest)
return TRUE;
if (min1 < max1) {
g_value_init (pv1, GST_TYPE_DOUBLE_RANGE);
gst_value_set_double_range (pv1, min1, max1);
}
if (min2 < max2) {
g_value_init (pv2, GST_TYPE_DOUBLE_RANGE);
gst_value_set_double_range (pv2, min2, max2);
}
if (min1 < max1 && min2 < max2) {
gst_value_list_concat_and_take_values (dest, pv1, pv2);
}
return TRUE;
}
static gboolean
gst_value_subtract_from_list (GValue * dest, const GValue * minuend,
const GValue * subtrahend)
{
guint i, size;
GValue subtraction = { 0, };
gboolean ret = FALSE;
size = VALUE_LIST_SIZE (minuend);
for (i = 0; i < size; i++) {
const GValue *cur = VALUE_LIST_GET_VALUE (minuend, i);
/* quicker version when we can discard the result */
if (!dest) {
if (gst_value_subtract (NULL, cur, subtrahend)) {
ret = TRUE;
break;
}
continue;
}
if (gst_value_subtract (&subtraction, cur, subtrahend)) {
if (!ret) {
gst_value_move (dest, &subtraction);
ret = TRUE;
} else if (G_VALUE_TYPE (dest) == GST_TYPE_LIST
&& G_VALUE_TYPE (&subtraction) != GST_TYPE_LIST) {
_gst_value_list_append_and_take_value (dest, &subtraction);
} else {
GValue temp;
gst_value_move (&temp, dest);
gst_value_list_concat_and_take_values (dest, &temp, &subtraction);
}
}
}
return ret;
}
static gboolean
gst_value_subtract_list (GValue * dest, const GValue * minuend,
const GValue * subtrahend)
{
guint i, size;
GValue data[2] = { {0,}, {0,} };
GValue *subtraction = &data[0], *result = &data[1];
gst_value_init_and_copy (result, minuend);
size = VALUE_LIST_SIZE (subtrahend);
for (i = 0; i < size; i++) {
const GValue *cur = VALUE_LIST_GET_VALUE (subtrahend, i);
if (gst_value_subtract (subtraction, result, cur)) {
GValue *temp = result;
result = subtraction;
subtraction = temp;
g_value_unset (subtraction);
} else {
g_value_unset (result);
return FALSE;
}
}
if (dest) {
gst_value_move (dest, result);
} else {
g_value_unset (result);
}
return TRUE;
}
static gboolean
gst_value_subtract_fraction_fraction_range (GValue * dest,
const GValue * minuend, const GValue * subtrahend)
{
const GValue *min = gst_value_get_fraction_range_min (subtrahend);
const GValue *max = gst_value_get_fraction_range_max (subtrahend);
GstValueCompareFunc compare;
if ((compare = gst_value_get_compare_func (minuend))) {
/* subtracting a range from an fraction only works if the fraction
* is not in the range */
if (gst_value_compare_with_func (minuend, min, compare) ==
GST_VALUE_LESS_THAN ||
gst_value_compare_with_func (minuend, max, compare) ==
GST_VALUE_GREATER_THAN) {
/* and the result is the value */
if (dest)
gst_value_init_and_copy (dest, minuend);
return TRUE;
}
}
return FALSE;
}
static gboolean
gst_value_subtract_fraction_range_fraction (GValue * dest,
const GValue * minuend, const GValue * subtrahend)
{
/* since we don't have open ranges, we cannot create a hole in
* a range. We return the original range */
if (dest)
gst_value_init_and_copy (dest, minuend);
return TRUE;
}
static gboolean
gst_value_subtract_fraction_range_fraction_range (GValue * dest,
const GValue * minuend, const GValue * subtrahend)
{
/* since we don't have open ranges, we have to approximate */
/* done like with ints and doubles. Creates a list of 2 fraction ranges */
const GValue *min1 = gst_value_get_fraction_range_min (minuend);
const GValue *max2 = gst_value_get_fraction_range_max (minuend);
const GValue *max1 = gst_value_get_fraction_range_min (subtrahend);
const GValue *min2 = gst_value_get_fraction_range_max (subtrahend);
gint cmp1, cmp2;
GValue v1 = { 0, };
GValue v2 = { 0, };
GValue *pv1, *pv2; /* yeah, hungarian! */
GstValueCompareFunc compare;
g_return_val_if_fail (min1 != NULL && max1 != NULL, FALSE);
g_return_val_if_fail (min2 != NULL && max2 != NULL, FALSE);
compare = gst_value_get_compare_func (min1);
g_return_val_if_fail (compare, FALSE);
cmp1 = gst_value_compare_with_func (max2, max1, compare);
g_return_val_if_fail (cmp1 != GST_VALUE_UNORDERED, FALSE);
if (cmp1 == GST_VALUE_LESS_THAN)
max1 = max2;
cmp1 = gst_value_compare_with_func (min1, min2, compare);
g_return_val_if_fail (cmp1 != GST_VALUE_UNORDERED, FALSE);
if (cmp1 == GST_VALUE_GREATER_THAN)
min2 = min1;
cmp1 = gst_value_compare_with_func (min1, max1, compare);
cmp2 = gst_value_compare_with_func (min2, max2, compare);
if (cmp1 == GST_VALUE_LESS_THAN && cmp2 == GST_VALUE_LESS_THAN) {
pv1 = &v1;
pv2 = &v2;
} else if (cmp1 == GST_VALUE_LESS_THAN) {
pv1 = dest;
pv2 = NULL;
} else if (cmp2 == GST_VALUE_LESS_THAN) {
pv1 = NULL;
pv2 = dest;
} else {
return FALSE;
}
if (!dest)
return TRUE;
if (cmp1 == GST_VALUE_LESS_THAN) {
g_value_init (pv1, GST_TYPE_FRACTION_RANGE);
gst_value_set_fraction_range (pv1, min1, max1);
}
if (cmp2 == GST_VALUE_LESS_THAN) {
g_value_init (pv2, GST_TYPE_FRACTION_RANGE);
gst_value_set_fraction_range (pv2, min2, max2);
}
if (cmp1 == GST_VALUE_LESS_THAN && cmp2 == GST_VALUE_LESS_THAN) {
gst_value_list_concat_and_take_values (dest, pv1, pv2);
}
return TRUE;
}
/**************
* comparison *
**************/
/*
* gst_value_get_compare_func:
* @value1: a value to get the compare function for
*
* Determines the compare function to be used with values of the same type as
* @value1. The function can be given to gst_value_compare_with_func().
*
* Returns: A #GstValueCompareFunc value
*/
static GstValueCompareFunc
gst_value_get_compare_func (const GValue * value1)
{
GstValueTable *table, *best = NULL;
guint i;
GType type1;
type1 = G_VALUE_TYPE (value1);
/* this is a fast check */
best = gst_value_hash_lookup_type (type1);
/* slower checks */
if (G_UNLIKELY (!best || !best->compare)) {
guint len = gst_value_table->len;
best = NULL;
for (i = 0; i < len; i++) {
table = &g_array_index (gst_value_table, GstValueTable, i);
if (table->compare && g_type_is_a (type1, table->type)) {
if (!best || g_type_is_a (table->type, best->type))
best = table;
}
}
}
if (G_LIKELY (best))
return best->compare;
return NULL;
}
static inline gboolean
gst_value_can_compare_unchecked (const GValue * value1, const GValue * value2)
{
if (G_VALUE_TYPE (value1) != G_VALUE_TYPE (value2))
return FALSE;
return gst_value_get_compare_func (value1) != NULL;
}
/**
* gst_value_can_compare:
* @value1: a value to compare
* @value2: another value to compare
*
* Determines if @value1 and @value2 can be compared.
*
* Returns: %TRUE if the values can be compared
*/
gboolean
gst_value_can_compare (const GValue * value1, const GValue * value2)
{
g_return_val_if_fail (G_IS_VALUE (value1), FALSE);
g_return_val_if_fail (G_IS_VALUE (value2), FALSE);
return gst_value_can_compare_unchecked (value1, value2);
}
static gboolean
gst_value_list_equals_range (const GValue * list, const GValue * value)
{
const GValue *first;
guint list_size, n;
g_assert (G_IS_VALUE (list));
g_assert (G_IS_VALUE (value));
g_assert (GST_VALUE_HOLDS_LIST (list));
/* TODO: compare against an empty list ? No type though... */
list_size = VALUE_LIST_SIZE (list);
if (list_size == 0)
return FALSE;
/* compare the basic types - they have to match */
first = VALUE_LIST_GET_VALUE (list, 0);
#define CHECK_TYPES(type,prefix) \
(prefix##_VALUE_HOLDS_##type(first) && GST_VALUE_HOLDS_##type##_RANGE (value))
if (CHECK_TYPES (INT, G)) {
const gint rmin = gst_value_get_int_range_min (value);
const gint rmax = gst_value_get_int_range_max (value);
const gint rstep = gst_value_get_int_range_step (value);
if (rstep == 0)
return FALSE;
/* note: this will overflow for min 0 and max INT_MAX, but this
would only be equal to a list of INT_MAX elements, which seems
very unlikely */
if (list_size != rmax / rstep - rmin / rstep + 1)
return FALSE;
for (n = 0; n < list_size; ++n) {
gint v = g_value_get_int (VALUE_LIST_GET_VALUE (list, n));
if (v < rmin || v > rmax || v % rstep) {
return FALSE;
}
}
return TRUE;
} else if (CHECK_TYPES (INT64, G)) {
const gint64 rmin = gst_value_get_int64_range_min (value);
const gint64 rmax = gst_value_get_int64_range_max (value);
const gint64 rstep = gst_value_get_int64_range_step (value);
GST_DEBUG ("List/range of int64s");
if (rstep == 0)
return FALSE;
if (list_size != rmax / rstep - rmin / rstep + 1)
return FALSE;
for (n = 0; n < list_size; ++n) {
gint64 v = g_value_get_int64 (VALUE_LIST_GET_VALUE (list, n));
if (v < rmin || v > rmax || v % rstep)
return FALSE;
}
return TRUE;
}
#undef CHECK_TYPES
/* other combinations don't make sense for equality */
return FALSE;
}
/* "Pure" variant of gst_value_compare which is guaranteed to
* not have list arguments and therefore does basic comparisons
*
* Handled will be set to TRUE if there is a valid compared function
* regardless of whether the two values are equal or not. This is
* useful to know whether this function returned !EQUAL because the
* values are compatible but didn't match or because there wasn't
* a valid comparision function.
*/
static inline gint
_gst_value_compare_nolist (const GValue * value1, const GValue * value2,
gboolean * handled)
{
GstValueCompareFunc compare;
if (handled)
*handled = FALSE;
if (G_VALUE_TYPE (value1) != G_VALUE_TYPE (value2))
return GST_VALUE_UNORDERED;
compare = gst_value_get_compare_func (value1);
if (compare) {
if (handled)
*handled = TRUE;
return compare (value1, value2);
}
g_critical ("unable to compare values of type %s\n",
g_type_name (G_VALUE_TYPE (value1)));
return GST_VALUE_UNORDERED;
}
/**
* gst_value_compare:
* @value1: a value to compare
* @value2: another value to compare
*
* Compares @value1 and @value2. If @value1 and @value2 cannot be
* compared, the function returns GST_VALUE_UNORDERED. Otherwise,
* if @value1 is greater than @value2, GST_VALUE_GREATER_THAN is returned.
* If @value1 is less than @value2, GST_VALUE_LESS_THAN is returned.
* If the values are equal, GST_VALUE_EQUAL is returned.
*
* Returns: comparison result
*/
gint
gst_value_compare (const GValue * value1, const GValue * value2)
{
gboolean value1_is_list;
gboolean value2_is_list;
g_return_val_if_fail (G_IS_VALUE (value1), GST_VALUE_LESS_THAN);
g_return_val_if_fail (G_IS_VALUE (value2), GST_VALUE_GREATER_THAN);
value1_is_list = G_VALUE_TYPE (value1) == GST_TYPE_LIST;
value2_is_list = G_VALUE_TYPE (value2) == GST_TYPE_LIST;
/* Special cases: lists and scalar values ("{ 1 }" and "1" are equal),
as well as lists and ranges ("{ 1, 2 }" and "[ 1, 2 ]" are equal) */
if (value1_is_list && !value2_is_list) {
gint i, n, ret;
if (gst_value_list_equals_range (value1, value2)) {
return GST_VALUE_EQUAL;
}
n = gst_value_list_get_size (value1);
if (n == 0)
return GST_VALUE_UNORDERED;
for (i = 0; i < n; i++) {
const GValue *elt;
elt = gst_value_list_get_value (value1, i);
ret = gst_value_compare (elt, value2);
if (ret != GST_VALUE_EQUAL && n == 1)
return ret;
else if (ret != GST_VALUE_EQUAL)
return GST_VALUE_UNORDERED;
}
return GST_VALUE_EQUAL;
} else if (value2_is_list && !value1_is_list) {
gint i, n, ret;
if (gst_value_list_equals_range (value2, value1)) {
return GST_VALUE_EQUAL;
}
n = gst_value_list_get_size (value2);
if (n == 0)
return GST_VALUE_UNORDERED;
for (i = 0; i < n; i++) {
const GValue *elt;
elt = gst_value_list_get_value (value2, i);
ret = gst_value_compare (elt, value1);
if (ret != GST_VALUE_EQUAL && n == 1)
return ret;
else if (ret != GST_VALUE_EQUAL)
return GST_VALUE_UNORDERED;
}
return GST_VALUE_EQUAL;
}
/* And now handle the generic case */
return _gst_value_compare_nolist (value1, value2, NULL);
}
/*
* gst_value_compare_with_func:
* @value1: a value to compare
* @value2: another value to compare
* @compare: compare function
*
* Compares @value1 and @value2 using the @compare function. Works like
* gst_value_compare() but allows to save time determining the compare function
* a multiple times.
*
* Returns: comparison result
*/
static gint
gst_value_compare_with_func (const GValue * value1, const GValue * value2,
GstValueCompareFunc compare)
{
g_assert (compare);
if (G_VALUE_TYPE (value1) != G_VALUE_TYPE (value2))
return GST_VALUE_UNORDERED;
return compare (value1, value2);
}
/* union */
/**
* gst_value_can_union:
* @value1: a value to union
* @value2: another value to union
*
* Determines if @value1 and @value2 can be non-trivially unioned.
* Any two values can be trivially unioned by adding both of them
* to a GstValueList. However, certain types have the possibility
* to be unioned in a simpler way. For example, an integer range
* and an integer can be unioned if the integer is a subset of the
* integer range. If there is the possibility that two values can
* be unioned, this function returns %TRUE.
*
* Returns: %TRUE if there is a function allowing the two values to
* be unioned.
*/
gboolean
gst_value_can_union (const GValue * value1, const GValue * value2)
{
GstValueUnionInfo *union_info;
guint i, len;
g_return_val_if_fail (G_IS_VALUE (value1), FALSE);
g_return_val_if_fail (G_IS_VALUE (value2), FALSE);
len = gst_value_union_funcs->len;
for (i = 0; i < len; i++) {
union_info = &g_array_index (gst_value_union_funcs, GstValueUnionInfo, i);
if (union_info->type1 == G_VALUE_TYPE (value1) &&
union_info->type2 == G_VALUE_TYPE (value2))
return TRUE;
if (union_info->type1 == G_VALUE_TYPE (value2) &&
union_info->type2 == G_VALUE_TYPE (value1))
return TRUE;
}
return FALSE;
}
/**
* gst_value_union:
* @dest: (out caller-allocates): the destination value
* @value1: a value to union
* @value2: another value to union
*
* Creates a GValue corresponding to the union of @value1 and @value2.
*
* Returns: %TRUE if the union succeeded.
*/
gboolean
gst_value_union (GValue * dest, const GValue * value1, const GValue * value2)
{
const GstValueUnionInfo *union_info;
guint i, len;
GType type1, type2;
g_return_val_if_fail (dest != NULL, FALSE);
g_return_val_if_fail (G_IS_VALUE (value1), FALSE);
g_return_val_if_fail (G_IS_VALUE (value2), FALSE);
g_return_val_if_fail (gst_value_list_or_array_are_compatible (value1, value2),
FALSE);
len = gst_value_union_funcs->len;
type1 = G_VALUE_TYPE (value1);
type2 = G_VALUE_TYPE (value2);
for (i = 0; i < len; i++) {
union_info = &g_array_index (gst_value_union_funcs, GstValueUnionInfo, i);
if (union_info->type1 == type1 && union_info->type2 == type2) {
return union_info->func (dest, value1, value2);
}
if (union_info->type1 == type2 && union_info->type2 == type1) {
return union_info->func (dest, value2, value1);
}
}
gst_value_list_concat (dest, value1, value2);
return TRUE;
}
/* gst_value_register_union_func: (skip)
* @type1: a type to union
* @type2: another type to union
* @func: a function that implements creating a union between the two types
*
* Registers a union function that can create a union between #GValue items
* of the type @type1 and @type2.
*
* Union functions should be registered at startup before any pipelines are
* started, as gst_value_register_union_func() is not thread-safe and cannot
* be used at the same time as gst_value_union() or gst_value_can_union().
*/
static void
gst_value_register_union_func (GType type1, GType type2, GstValueUnionFunc func)
{
GstValueUnionInfo union_info;
union_info.type1 = type1;
union_info.type2 = type2;
union_info.func = func;
g_array_append_val (gst_value_union_funcs, union_info);
}
/* intersection */
/**
* gst_value_can_intersect:
* @value1: a value to intersect
* @value2: another value to intersect
*
* Determines if intersecting two values will produce a valid result.
* Two values will produce a valid intersection if they have the same
* type.
*
* Returns: %TRUE if the values can intersect
*/
gboolean
gst_value_can_intersect (const GValue * value1, const GValue * value2)
{
GstValueIntersectInfo *intersect_info;
guint i, len;
GType type1, type2;
g_return_val_if_fail (G_IS_VALUE (value1), FALSE);
g_return_val_if_fail (G_IS_VALUE (value2), FALSE);
type1 = G_VALUE_TYPE (value1);
type2 = G_VALUE_TYPE (value2);
/* practically all GstValue types have a compare function (_can_compare=TRUE)
* GstStructure and GstCaps have not, but are intersectable */
if (type1 == type2)
return TRUE;
/* special cases */
if (type1 == GST_TYPE_LIST || type2 == GST_TYPE_LIST)
return TRUE;
if (G_UNLIKELY (GST_VALUE_HOLDS_FLAG_SET (value1) &&
GST_VALUE_HOLDS_FLAG_SET (value2))) {
GType type1, type2, flagset_type;
type1 = G_VALUE_TYPE (value1);
type2 = G_VALUE_TYPE (value2);
flagset_type = GST_TYPE_FLAG_SET;
/* Allow intersection with the generic FlagSet type, on one
* side, but not 2 different subtypes - that makes no sense */
if (type1 == type2 || type1 == flagset_type || type2 == flagset_type)
return TRUE;
}
/* check registered intersect functions */
len = gst_value_intersect_funcs->len;
for (i = 0; i < len; i++) {
intersect_info = &g_array_index (gst_value_intersect_funcs,
GstValueIntersectInfo, i);
if ((intersect_info->type1 == type1 && intersect_info->type2 == type2) ||
(intersect_info->type1 == type2 && intersect_info->type2 == type1))
return TRUE;
}
return gst_value_can_compare_unchecked (value1, value2);
}
/**
* gst_value_intersect:
* @dest: (out caller-allocates) (transfer full) (allow-none):
* a uninitialized #GValue that will hold the calculated
* intersection value. May be %NULL if the resulting set if not
* needed.
* @value1: a value to intersect
* @value2: another value to intersect
*
* Calculates the intersection of two values. If the values have
* a non-empty intersection, the value representing the intersection
* is placed in @dest, unless %NULL. If the intersection is non-empty,
* @dest is not modified.
*
* Returns: %TRUE if the intersection is non-empty
*/
gboolean
gst_value_intersect (GValue * dest, const GValue * value1,
const GValue * value2)
{
GstValueIntersectInfo *intersect_info;
guint i, len;
GType type1, type2;
gboolean handled;
g_return_val_if_fail (G_IS_VALUE (value1), FALSE);
g_return_val_if_fail (G_IS_VALUE (value2), FALSE);
type1 = G_VALUE_TYPE (value1);
type2 = G_VALUE_TYPE (value2);
/* special cases first */
if (type1 == GST_TYPE_LIST)
return gst_value_intersect_list (dest, value1, value2);
if (type2 == GST_TYPE_LIST)
return gst_value_intersect_list (dest, value2, value1);
if (_gst_value_compare_nolist (value1, value2, &handled) == GST_VALUE_EQUAL) {
if (dest)
gst_value_init_and_copy (dest, value1);
return TRUE;
}
len = gst_value_intersect_funcs->len;
for (i = 0; i < len; i++) {
intersect_info = &g_array_index (gst_value_intersect_funcs,
GstValueIntersectInfo, i);
if (intersect_info->type1 == type1 && intersect_info->type2 == type2) {
return intersect_info->func (dest, value1, value2);
}
if (intersect_info->type1 == type2 && intersect_info->type2 == type1) {
return intersect_info->func (dest, value2, value1);
}
}
/* If there was a comparision that failed and it doesnt' have an
* intersect function then it definitely can't intersect */
if (handled)
return FALSE;
/* Failed to find a direct intersection, check if these are
* GstFlagSet sub-types. */
if (G_UNLIKELY (GST_VALUE_HOLDS_FLAG_SET (value1) &&
GST_VALUE_HOLDS_FLAG_SET (value2))) {
return gst_value_intersect_flagset_flagset (dest, value1, value2);
}
return FALSE;
}
/* gst_value_register_intersect_func: (skip)
* @type1: the first type to intersect
* @type2: the second type to intersect
* @func: the intersection function
*
* Registers a function that is called to calculate the intersection
* of the values having the types @type1 and @type2.
*
* Intersect functions should be registered at startup before any pipelines are
* started, as gst_value_register_intersect_func() is not thread-safe and
* cannot be used at the same time as gst_value_intersect() or
* gst_value_can_intersect().
*/
static void
gst_value_register_intersect_func (GType type1, GType type2,
GstValueIntersectFunc func)
{
GstValueIntersectInfo intersect_info;
intersect_info.type1 = type1;
intersect_info.type2 = type2;
intersect_info.func = func;
g_array_append_val (gst_value_intersect_funcs, intersect_info);
}
/* subtraction */
/**
* gst_value_subtract:
* @dest: (out caller-allocates) (allow-none): the destination value
* for the result if the subtraction is not empty. May be %NULL,
* in which case the resulting set will not be computed, which can
* give a fair speedup.
* @minuend: the value to subtract from
* @subtrahend: the value to subtract
*
* Subtracts @subtrahend from @minuend and stores the result in @dest.
* Note that this means subtraction as in sets, not as in mathematics.
*
* Returns: %TRUE if the subtraction is not empty
*/
gboolean
gst_value_subtract (GValue * dest, const GValue * minuend,
const GValue * subtrahend)
{
GstValueSubtractInfo *info;
guint i, len;
GType mtype, stype;
g_return_val_if_fail (G_IS_VALUE (minuend), FALSE);
g_return_val_if_fail (G_IS_VALUE (subtrahend), FALSE);
mtype = G_VALUE_TYPE (minuend);
stype = G_VALUE_TYPE (subtrahend);
/* special cases first */
if (mtype == GST_TYPE_LIST)
return gst_value_subtract_from_list (dest, minuend, subtrahend);
if (stype == GST_TYPE_LIST)
return gst_value_subtract_list (dest, minuend, subtrahend);
len = gst_value_subtract_funcs->len;
for (i = 0; i < len; i++) {
info = &g_array_index (gst_value_subtract_funcs, GstValueSubtractInfo, i);
if (info->minuend == mtype && info->subtrahend == stype) {
return info->func (dest, minuend, subtrahend);
}
}
if (_gst_value_compare_nolist (minuend, subtrahend, NULL) != GST_VALUE_EQUAL) {
if (dest)
gst_value_init_and_copy (dest, minuend);
return TRUE;
}
return FALSE;
}
#if 0
gboolean
gst_value_subtract (GValue * dest, const GValue * minuend,
const GValue * subtrahend)
{
gboolean ret = gst_value_subtract2 (dest, minuend, subtrahend);
g_printerr ("\"%s\" - \"%s\" = \"%s\"\n", gst_value_serialize (minuend),
gst_value_serialize (subtrahend),
ret ? gst_value_serialize (dest) : "---");
return ret;
}
#endif
/**
* gst_value_can_subtract:
* @minuend: the value to subtract from
* @subtrahend: the value to subtract
*
* Checks if it's possible to subtract @subtrahend from @minuend.
*
* Returns: %TRUE if a subtraction is possible
*/
gboolean
gst_value_can_subtract (const GValue * minuend, const GValue * subtrahend)
{
GstValueSubtractInfo *info;
guint i, len;
GType mtype, stype;
g_return_val_if_fail (G_IS_VALUE (minuend), FALSE);
g_return_val_if_fail (G_IS_VALUE (subtrahend), FALSE);
mtype = G_VALUE_TYPE (minuend);
stype = G_VALUE_TYPE (subtrahend);
/* special cases */
if (mtype == GST_TYPE_LIST || stype == GST_TYPE_LIST)
return TRUE;
if (mtype == GST_TYPE_STRUCTURE || stype == GST_TYPE_STRUCTURE)
return FALSE;
len = gst_value_subtract_funcs->len;
for (i = 0; i < len; i++) {
info = &g_array_index (gst_value_subtract_funcs, GstValueSubtractInfo, i);
if (info->minuend == mtype && info->subtrahend == stype)
return TRUE;
}
return gst_value_can_compare_unchecked (minuend, subtrahend);
}
/* gst_value_register_subtract_func: (skip)
* @minuend_type: type of the minuend
* @subtrahend_type: type of the subtrahend
* @func: function to use
*
* Registers @func as a function capable of subtracting the values of
* @subtrahend_type from values of @minuend_type.
*
* Subtract functions should be registered at startup before any pipelines are
* started, as gst_value_register_subtract_func() is not thread-safe and
* cannot be used at the same time as gst_value_subtract().
*/
static void
gst_value_register_subtract_func (GType minuend_type, GType subtrahend_type,
GstValueSubtractFunc func)
{
GstValueSubtractInfo info;
g_return_if_fail (!gst_type_is_fixed (minuend_type)
|| !gst_type_is_fixed (subtrahend_type));
info.minuend = minuend_type;
info.subtrahend = subtrahend_type;
info.func = func;
g_array_append_val (gst_value_subtract_funcs, info);
}
/**
* gst_value_register:
* @table: structure containing functions to register
*
* Registers functions to perform calculations on #GValue items of a given
* type. Each type can only be added once.
*/
void
gst_value_register (const GstValueTable * table)
{
GstValueTable *found;
g_return_if_fail (table != NULL);
g_array_append_val (gst_value_table, *table);
found = gst_value_hash_lookup_type (table->type);
if (found)
g_warning ("adding type %s multiple times", g_type_name (table->type));
/* FIXME: we're not really doing the const justice, we assume the table is
* static */
gst_value_hash_add_type (table->type, table);
}
/**
* gst_value_init_and_copy:
* @dest: (out caller-allocates): the target value
* @src: the source value
*
* Initialises the target value to be of the same type as source and then copies
* the contents from source to target.
*/
void
gst_value_init_and_copy (GValue * dest, const GValue * src)
{
g_return_if_fail (G_IS_VALUE (src));
g_return_if_fail (dest != NULL);
g_value_init (dest, G_VALUE_TYPE (src));
g_value_copy (src, dest);
}
/* move src into dest and clear src */
static void
gst_value_move (GValue * dest, GValue * src)
{
g_assert (G_IS_VALUE (src));
g_assert (dest != NULL);
*dest = *src;
memset (src, 0, sizeof (GValue));
}
/**
* gst_value_serialize:
* @value: a #GValue to serialize
*
* tries to transform the given @value into a string representation that allows
* getting back this string later on using gst_value_deserialize().
*
* Free-function: g_free
*
* Returns: (transfer full) (nullable): the serialization for @value
* or %NULL if none exists
*/
gchar *
gst_value_serialize (const GValue * value)
{
guint i, len;
GValue s_val = { 0 };
GstValueTable *table, *best;
gchar *s;
GType type;
g_return_val_if_fail (G_IS_VALUE (value), NULL);
type = G_VALUE_TYPE (value);
best = gst_value_hash_lookup_type (type);
if (G_UNLIKELY (!best || !best->serialize)) {
len = gst_value_table->len;
best = NULL;
for (i = 0; i < len; i++) {
table = &g_array_index (gst_value_table, GstValueTable, i);
if (table->serialize && g_type_is_a (type, table->type)) {
if (!best || g_type_is_a (table->type, best->type))
best = table;
}
}
}
if (G_LIKELY (best))
return best->serialize (value);
g_value_init (&s_val, G_TYPE_STRING);
if (g_value_transform (value, &s_val)) {
s = gst_string_wrap (g_value_get_string (&s_val));
} else {
s = NULL;
}
g_value_unset (&s_val);
return s;
}
/**
* gst_value_deserialize:
* @dest: (out caller-allocates): #GValue to fill with contents of
* deserialization
* @src: string to deserialize
*
* Tries to deserialize a string into the type specified by the given GValue.
* If the operation succeeds, %TRUE is returned, %FALSE otherwise.
*
* Returns: %TRUE on success
*/
gboolean
gst_value_deserialize (GValue * dest, const gchar * src)
{
GstValueTable *table, *best;
guint i, len;
GType type;
g_return_val_if_fail (src != NULL, FALSE);
g_return_val_if_fail (G_IS_VALUE (dest), FALSE);
type = G_VALUE_TYPE (dest);
best = gst_value_hash_lookup_type (type);
if (G_UNLIKELY (!best || !best->deserialize)) {
len = gst_value_table->len;
best = NULL;
for (i = 0; i < len; i++) {
table = &g_array_index (gst_value_table, GstValueTable, i);
if (table->deserialize && g_type_is_a (type, table->type)) {
if (!best || g_type_is_a (table->type, best->type))
best = table;
}
}
}
if (G_LIKELY (best))
return best->deserialize (dest, src);
return FALSE;
}
static gboolean
structure_field_is_fixed (GQuark field_id, const GValue * val,
gpointer user_data)
{
return gst_value_is_fixed (val);
}
/**
* gst_value_is_fixed:
* @value: the #GValue to check
*
* Tests if the given GValue, if available in a GstStructure (or any other
* container) contains a "fixed" (which means: one value) or an "unfixed"
* (which means: multiple possible values, such as data lists or data
* ranges) value.
*
* Returns: true if the value is "fixed".
*/
gboolean
gst_value_is_fixed (const GValue * value)
{
GType type;
g_return_val_if_fail (G_IS_VALUE (value), FALSE);
type = G_VALUE_TYPE (value);
/* the most common types are just basic plain glib types */
if (type <= G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_GLIB_LAST)) {
return TRUE;
}
if (type == GST_TYPE_ARRAY) {
gint size, n;
const GValue *kid;
/* check recursively */
size = gst_value_array_get_size (value);
for (n = 0; n < size; n++) {
kid = gst_value_array_get_value (value, n);
if (!gst_value_is_fixed (kid))
return FALSE;
}
return TRUE;
} else if (GST_VALUE_HOLDS_FLAG_SET (value)) {
/* Flagsets are only fixed if there are no 'don't care' bits */
return (gst_value_get_flagset_mask (value) == GST_FLAG_SET_MASK_EXACT);
} else if (GST_VALUE_HOLDS_STRUCTURE (value)) {
return gst_structure_foreach (gst_value_get_structure (value),
structure_field_is_fixed, NULL);
}
return gst_type_is_fixed (type);
}
/**
* gst_value_fixate:
* @dest: the #GValue destination
* @src: the #GValue to fixate
*
* Fixate @src into a new value @dest.
* For ranges, the first element is taken. For lists and arrays, the
* first item is fixated and returned.
* If @src is already fixed, this function returns %FALSE.
*
* Returns: %TRUE if @dest contains a fixated version of @src.
*/
gboolean
gst_value_fixate (GValue * dest, const GValue * src)
{
g_return_val_if_fail (G_IS_VALUE (src), FALSE);
g_return_val_if_fail (dest != NULL, FALSE);
if (G_VALUE_TYPE (src) == GST_TYPE_INT_RANGE) {
g_value_init (dest, G_TYPE_INT);
g_value_set_int (dest, gst_value_get_int_range_min (src));
} else if (G_VALUE_TYPE (src) == GST_TYPE_DOUBLE_RANGE) {
g_value_init (dest, G_TYPE_DOUBLE);
g_value_set_double (dest, gst_value_get_double_range_min (src));
} else if (G_VALUE_TYPE (src) == GST_TYPE_FRACTION_RANGE) {
gst_value_init_and_copy (dest, gst_value_get_fraction_range_min (src));
} else if (G_VALUE_TYPE (src) == GST_TYPE_LIST) {
GValue temp = { 0 };
/* list could be empty */
if (gst_value_list_get_size (src) <= 0)
return FALSE;
gst_value_init_and_copy (&temp, gst_value_list_get_value (src, 0));
if (!gst_value_fixate (dest, &temp)) {
gst_value_move (dest, &temp);
} else {
g_value_unset (&temp);
}
} else if (G_VALUE_TYPE (src) == GST_TYPE_ARRAY) {
gboolean res = FALSE;
guint n, len;
len = gst_value_array_get_size (src);
g_value_init (dest, GST_TYPE_ARRAY);
for (n = 0; n < len; n++) {
GValue kid = { 0 };
const GValue *orig_kid = gst_value_array_get_value (src, n);
if (!gst_value_fixate (&kid, orig_kid))
gst_value_init_and_copy (&kid, orig_kid);
else
res = TRUE;
_gst_value_array_append_and_take_value (dest, &kid);
}
if (!res)
g_value_unset (dest);
return res;
} else if (GST_VALUE_HOLDS_FLAG_SET (src)) {
guint flags;
if (gst_value_get_flagset_mask (src) == GST_FLAG_SET_MASK_EXACT)
return FALSE; /* Already fixed */
flags = gst_value_get_flagset_flags (src);
g_value_init (dest, G_VALUE_TYPE (src));
gst_value_set_flagset (dest, flags, GST_FLAG_SET_MASK_EXACT);
return TRUE;
} else if (GST_VALUE_HOLDS_STRUCTURE (src)) {
const GstStructure *str = (GstStructure *) gst_value_get_structure (src);
GstStructure *kid;
if (!str)
return FALSE;
kid = gst_structure_copy (str);
gst_structure_fixate (kid);
g_value_init (dest, GST_TYPE_STRUCTURE);
gst_value_set_structure (dest, kid);
gst_structure_free (kid);
return TRUE;
} else {
return FALSE;
}
return TRUE;
}
/************
* fraction *
************/
/* helper functions */
static void
gst_value_init_fraction (GValue * value)
{
value->data[0].v_int = 0;
value->data[1].v_int = 1;
}
static void
gst_value_copy_fraction (const GValue * src_value, GValue * dest_value)
{
dest_value->data[0].v_int = src_value->data[0].v_int;
dest_value->data[1].v_int = src_value->data[1].v_int;
}
static gchar *
gst_value_collect_fraction (GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
if (n_collect_values != 2)
return g_strdup_printf ("not enough value locations for `%s' passed",
G_VALUE_TYPE_NAME (value));
if (collect_values[1].v_int == 0)
return g_strdup_printf ("passed '0' as denominator for `%s'",
G_VALUE_TYPE_NAME (value));
if (collect_values[0].v_int < -G_MAXINT)
return
g_strdup_printf
("passed value smaller than -G_MAXINT as numerator for `%s'",
G_VALUE_TYPE_NAME (value));
if (collect_values[1].v_int < -G_MAXINT)
return
g_strdup_printf
("passed value smaller than -G_MAXINT as denominator for `%s'",
G_VALUE_TYPE_NAME (value));
gst_value_set_fraction (value,
collect_values[0].v_int, collect_values[1].v_int);
return NULL;
}
static gchar *
gst_value_lcopy_fraction (const GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
gint *numerator = collect_values[0].v_pointer;
gint *denominator = collect_values[1].v_pointer;
if (!numerator)
return g_strdup_printf ("numerator for `%s' passed as NULL",
G_VALUE_TYPE_NAME (value));
if (!denominator)
return g_strdup_printf ("denominator for `%s' passed as NULL",
G_VALUE_TYPE_NAME (value));
*numerator = value->data[0].v_int;
*denominator = value->data[1].v_int;
return NULL;
}
/**
* gst_value_set_fraction:
* @value: a GValue initialized to #GST_TYPE_FRACTION
* @numerator: the numerator of the fraction
* @denominator: the denominator of the fraction
*
* Sets @value to the fraction specified by @numerator over @denominator.
* The fraction gets reduced to the smallest numerator and denominator,
* and if necessary the sign is moved to the numerator.
*/
void
gst_value_set_fraction (GValue * value, gint numerator, gint denominator)
{
gint gcd = 0;
g_return_if_fail (GST_VALUE_HOLDS_FRACTION (value));
g_return_if_fail (denominator != 0);
g_return_if_fail (denominator >= -G_MAXINT);
g_return_if_fail (numerator >= -G_MAXINT);
/* normalize sign */
if (denominator < 0) {
numerator = -numerator;
denominator = -denominator;
}
/* check for reduction */
gcd = gst_util_greatest_common_divisor (numerator, denominator);
if (gcd) {
numerator /= gcd;
denominator /= gcd;
}
g_assert (denominator > 0);
value->data[0].v_int = numerator;
value->data[1].v_int = denominator;
}
/**
* gst_value_get_fraction_numerator:
* @value: a GValue initialized to #GST_TYPE_FRACTION
*
* Gets the numerator of the fraction specified by @value.
*
* Returns: the numerator of the fraction.
*/
gint
gst_value_get_fraction_numerator (const GValue * value)
{
g_return_val_if_fail (GST_VALUE_HOLDS_FRACTION (value), 0);
return value->data[0].v_int;
}
/**
* gst_value_get_fraction_denominator:
* @value: a GValue initialized to #GST_TYPE_FRACTION
*
* Gets the denominator of the fraction specified by @value.
*
* Returns: the denominator of the fraction.
*/
gint
gst_value_get_fraction_denominator (const GValue * value)
{
g_return_val_if_fail (GST_VALUE_HOLDS_FRACTION (value), 1);
return value->data[1].v_int;
}
/**
* gst_value_fraction_multiply:
* @product: a GValue initialized to #GST_TYPE_FRACTION
* @factor1: a GValue initialized to #GST_TYPE_FRACTION
* @factor2: a GValue initialized to #GST_TYPE_FRACTION
*
* Multiplies the two #GValue items containing a #GST_TYPE_FRACTION and sets
* @product to the product of the two fractions.
*
* Returns: %FALSE in case of an error (like integer overflow), %TRUE otherwise.
*/
gboolean
gst_value_fraction_multiply (GValue * product, const GValue * factor1,
const GValue * factor2)
{
gint n1, n2, d1, d2;
gint res_n, res_d;
g_return_val_if_fail (product != NULL, FALSE);
g_return_val_if_fail (GST_VALUE_HOLDS_FRACTION (factor1), FALSE);
g_return_val_if_fail (GST_VALUE_HOLDS_FRACTION (factor2), FALSE);
n1 = factor1->data[0].v_int;
n2 = factor2->data[0].v_int;
d1 = factor1->data[1].v_int;
d2 = factor2->data[1].v_int;
if (!gst_util_fraction_multiply (n1, d1, n2, d2, &res_n, &res_d))
return FALSE;
gst_value_set_fraction (product, res_n, res_d);
return TRUE;
}
/**
* gst_value_fraction_subtract:
* @dest: a GValue initialized to #GST_TYPE_FRACTION
* @minuend: a GValue initialized to #GST_TYPE_FRACTION
* @subtrahend: a GValue initialized to #GST_TYPE_FRACTION
*
* Subtracts the @subtrahend from the @minuend and sets @dest to the result.
*
* Returns: %FALSE in case of an error (like integer overflow), %TRUE otherwise.
*/
gboolean
gst_value_fraction_subtract (GValue * dest,
const GValue * minuend, const GValue * subtrahend)
{
gint n1, n2, d1, d2;
gint res_n, res_d;
g_return_val_if_fail (dest != NULL, FALSE);
g_return_val_if_fail (GST_VALUE_HOLDS_FRACTION (minuend), FALSE);
g_return_val_if_fail (GST_VALUE_HOLDS_FRACTION (subtrahend), FALSE);
n1 = minuend->data[0].v_int;
n2 = subtrahend->data[0].v_int;
d1 = minuend->data[1].v_int;
d2 = subtrahend->data[1].v_int;
if (!gst_util_fraction_add (n1, d1, -n2, d2, &res_n, &res_d))
return FALSE;
gst_value_set_fraction (dest, res_n, res_d);
return TRUE;
}
static gchar *
gst_value_serialize_fraction (const GValue * value)
{
gint32 numerator = value->data[0].v_int;
gint32 denominator = value->data[1].v_int;
gboolean positive = TRUE;
/* get the sign and make components absolute */
if (numerator < 0) {
numerator = -numerator;
positive = !positive;
}
if (denominator < 0) {
denominator = -denominator;
positive = !positive;
}
return g_strdup_printf ("%s%d/%d",
positive ? "" : "-", numerator, denominator);
}
static gboolean
gst_value_deserialize_fraction (GValue * dest, const gchar * s)
{
gint num, den;
gint num_chars;
if (G_UNLIKELY (s == NULL))
return FALSE;
if (G_UNLIKELY (dest == NULL || !GST_VALUE_HOLDS_FRACTION (dest)))
return FALSE;
if (sscanf (s, "%d/%d%n", &num, &den, &num_chars) >= 2) {
if (s[num_chars] != 0)
return FALSE;
if (den == 0)
return FALSE;
gst_value_set_fraction (dest, num, den);
return TRUE;
} else if (g_ascii_strcasecmp (s, "1/max") == 0) {
gst_value_set_fraction (dest, 1, G_MAXINT);
return TRUE;
} else if (sscanf (s, "%d%n", &num, &num_chars) >= 1) {
if (s[num_chars] != 0)
return FALSE;
gst_value_set_fraction (dest, num, 1);
return TRUE;
} else if (g_ascii_strcasecmp (s, "min") == 0) {
gst_value_set_fraction (dest, -G_MAXINT, 1);
return TRUE;
} else if (g_ascii_strcasecmp (s, "max") == 0) {
gst_value_set_fraction (dest, G_MAXINT, 1);
return TRUE;
}
return FALSE;
}
static void
gst_value_transform_fraction_string (const GValue * src_value,
GValue * dest_value)
{
dest_value->data[0].v_pointer = gst_value_serialize_fraction (src_value);
}
static void
gst_value_transform_string_fraction (const GValue * src_value,
GValue * dest_value)
{
if (!gst_value_deserialize_fraction (dest_value,
src_value->data[0].v_pointer))
/* If the deserialize fails, ensure we leave the fraction in a
* valid, if incorrect, state */
gst_value_set_fraction (dest_value, 0, 1);
}
static void
gst_value_transform_double_fraction (const GValue * src_value,
GValue * dest_value)
{
gdouble src = g_value_get_double (src_value);
gint n, d;
gst_util_double_to_fraction (src, &n, &d);
gst_value_set_fraction (dest_value, n, d);
}
static void
gst_value_transform_float_fraction (const GValue * src_value,
GValue * dest_value)
{
gfloat src = g_value_get_float (src_value);
gint n, d;
gst_util_double_to_fraction (src, &n, &d);
gst_value_set_fraction (dest_value, n, d);
}
static void
gst_value_transform_fraction_double (const GValue * src_value,
GValue * dest_value)
{
dest_value->data[0].v_double = ((double) src_value->data[0].v_int) /
((double) src_value->data[1].v_int);
}
static void
gst_value_transform_fraction_float (const GValue * src_value,
GValue * dest_value)
{
dest_value->data[0].v_float = ((float) src_value->data[0].v_int) /
((float) src_value->data[1].v_int);
}
static gint
gst_value_compare_fraction (const GValue * value1, const GValue * value2)
{
gint n1, n2;
gint d1, d2;
gint ret;
n1 = value1->data[0].v_int;
n2 = value2->data[0].v_int;
d1 = value1->data[1].v_int;
d2 = value2->data[1].v_int;
/* fractions are reduced when set, so we can quickly see if they're equal */
if (n1 == n2 && d1 == d2)
return GST_VALUE_EQUAL;
if (d1 == 0 && d2 == 0)
return GST_VALUE_UNORDERED;
else if (d1 == 0)
return GST_VALUE_GREATER_THAN;
else if (d2 == 0)
return GST_VALUE_LESS_THAN;
ret = gst_util_fraction_compare (n1, d1, n2, d2);
if (ret == -1)
return GST_VALUE_LESS_THAN;
else if (ret == 1)
return GST_VALUE_GREATER_THAN;
/* Equality can't happen here because we check for that
* first already */
g_return_val_if_reached (GST_VALUE_UNORDERED);
}
/*********
* GDate *
*********/
static gint
gst_value_compare_date (const GValue * value1, const GValue * value2)
{
const GDate *date1 = (const GDate *) g_value_get_boxed (value1);
const GDate *date2 = (const GDate *) g_value_get_boxed (value2);
guint32 j1, j2;
if (date1 == date2)
return GST_VALUE_EQUAL;
if ((date1 == NULL || !g_date_valid (date1))
&& (date2 != NULL && g_date_valid (date2))) {
return GST_VALUE_LESS_THAN;
}
if ((date2 == NULL || !g_date_valid (date2))
&& (date1 != NULL && g_date_valid (date1))) {
return GST_VALUE_GREATER_THAN;
}
if (date1 == NULL || date2 == NULL || !g_date_valid (date1)
|| !g_date_valid (date2)) {
return GST_VALUE_UNORDERED;
}
j1 = g_date_get_julian (date1);
j2 = g_date_get_julian (date2);
if (j1 == j2)
return GST_VALUE_EQUAL;
else if (j1 < j2)
return GST_VALUE_LESS_THAN;
else
return GST_VALUE_GREATER_THAN;
}
static gchar *
gst_value_serialize_date (const GValue * val)
{
const GDate *date = (const GDate *) g_value_get_boxed (val);
if (date == NULL || !g_date_valid (date))
return g_strdup ("9999-99-99");
return g_strdup_printf ("%04u-%02u-%02u", g_date_get_year (date),
g_date_get_month (date), g_date_get_day (date));
}
static gboolean
gst_value_deserialize_date (GValue * dest, const gchar * s)
{
guint year, month, day;
if (!s || sscanf (s, "%04u-%02u-%02u", &year, &month, &day) != 3)
return FALSE;
if (!g_date_valid_dmy (day, month, year))
return FALSE;
g_value_take_boxed (dest, g_date_new_dmy (day, month, year));
return TRUE;
}
/*************
* GstDateTime *
*************/
static gint
gst_value_compare_date_time (const GValue * value1, const GValue * value2)
{
const GstDateTime *date1 = (const GstDateTime *) g_value_get_boxed (value1);
const GstDateTime *date2 = (const GstDateTime *) g_value_get_boxed (value2);
if (date1 == date2)
return GST_VALUE_EQUAL;
if ((date1 == NULL) && (date2 != NULL)) {
return GST_VALUE_LESS_THAN;
}
if ((date2 == NULL) && (date1 != NULL)) {
return GST_VALUE_LESS_THAN;
}
/* returns GST_VALUE_* */
return __gst_date_time_compare (date1, date2);
}
static gchar *
gst_value_serialize_date_time (const GValue * val)
{
GstDateTime *date = (GstDateTime *) g_value_get_boxed (val);
if (date == NULL)
return g_strdup ("null");
return __gst_date_time_serialize (date, TRUE);
}
static gboolean
gst_value_deserialize_date_time (GValue * dest, const gchar * s)
{
GstDateTime *datetime;
if (!s || strcmp (s, "null") == 0) {
return FALSE;
}
datetime = gst_date_time_new_from_iso8601_string (s);
if (datetime != NULL) {
g_value_take_boxed (dest, datetime);
return TRUE;
}
GST_WARNING ("Failed to deserialize date time string '%s'", s);
return FALSE;
}
static void
gst_value_transform_date_string (const GValue * src_value, GValue * dest_value)
{
dest_value->data[0].v_pointer = gst_value_serialize_date (src_value);
}
static void
gst_value_transform_string_date (const GValue * src_value, GValue * dest_value)
{
gst_value_deserialize_date (dest_value, src_value->data[0].v_pointer);
}
/************
* bitmask *
************/
/* helper functions */
static void
gst_value_init_bitmask (GValue * value)
{
value->data[0].v_uint64 = 0;
}
static void
gst_value_copy_bitmask (const GValue * src_value, GValue * dest_value)
{
dest_value->data[0].v_uint64 = src_value->data[0].v_uint64;
}
static gchar *
gst_value_collect_bitmask (GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
if (n_collect_values != 1)
return g_strdup_printf ("not enough value locations for `%s' passed",
G_VALUE_TYPE_NAME (value));
gst_value_set_bitmask (value, (guint64) collect_values[0].v_int64);
return NULL;
}
static gchar *
gst_value_lcopy_bitmask (const GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
guint64 *bitmask = collect_values[0].v_pointer;
if (!bitmask)
return g_strdup_printf ("value for `%s' passed as NULL",
G_VALUE_TYPE_NAME (value));
*bitmask = value->data[0].v_uint64;
return NULL;
}
/**
* gst_value_set_bitmask:
* @value: a GValue initialized to #GST_TYPE_BITMASK
* @bitmask: the bitmask
*
* Sets @value to the bitmask specified by @bitmask.
*/
void
gst_value_set_bitmask (GValue * value, guint64 bitmask)
{
g_return_if_fail (GST_VALUE_HOLDS_BITMASK (value));
value->data[0].v_uint64 = bitmask;
}
/**
* gst_value_get_bitmask:
* @value: a GValue initialized to #GST_TYPE_BITMASK
*
* Gets the bitmask specified by @value.
*
* Returns: the bitmask.
*/
guint64
gst_value_get_bitmask (const GValue * value)
{
g_return_val_if_fail (GST_VALUE_HOLDS_BITMASK (value), 0);
return value->data[0].v_uint64;
}
static gchar *
gst_value_serialize_bitmask (const GValue * value)
{
guint64 bitmask = value->data[0].v_uint64;
return g_strdup_printf ("0x%016" G_GINT64_MODIFIER "x", bitmask);
}
static gboolean
gst_value_deserialize_bitmask (GValue * dest, const gchar * s)
{
gchar *endptr = NULL;
guint64 val;
if (G_UNLIKELY (s == NULL))
return FALSE;
if (G_UNLIKELY (dest == NULL || !GST_VALUE_HOLDS_BITMASK (dest)))
return FALSE;
errno = 0;
val = g_ascii_strtoull (s, &endptr, 16);
if (val == G_MAXUINT64 && (errno == ERANGE || errno == EINVAL))
return FALSE;
if (val == 0 && endptr == s)
return FALSE;
gst_value_set_bitmask (dest, val);
return TRUE;
}
static void
gst_value_transform_bitmask_string (const GValue * src_value,
GValue * dest_value)
{
dest_value->data[0].v_pointer = gst_value_serialize_bitmask (src_value);
}
static void
gst_value_transform_string_bitmask (const GValue * src_value,
GValue * dest_value)
{
if (!gst_value_deserialize_bitmask (dest_value, src_value->data[0].v_pointer))
gst_value_set_bitmask (dest_value, 0);
}
static void
gst_value_transform_uint64_bitmask (const GValue * src_value,
GValue * dest_value)
{
dest_value->data[0].v_uint64 = src_value->data[0].v_uint64;
}
static void
gst_value_transform_bitmask_uint64 (const GValue * src_value,
GValue * dest_value)
{
dest_value->data[0].v_uint64 = src_value->data[0].v_uint64;
}
static gint
gst_value_compare_bitmask (const GValue * value1, const GValue * value2)
{
guint64 v1, v2;
v1 = value1->data[0].v_uint64;
v2 = value2->data[0].v_uint64;
if (v1 == v2)
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
/************
* flagset *
************/
/* helper functions */
static void
gst_value_init_flagset (GValue * value)
{
value->data[0].v_uint = 0;
value->data[1].v_uint = 0;
}
static void
gst_value_copy_flagset (const GValue * src_value, GValue * dest_value)
{
dest_value->data[0].v_uint = src_value->data[0].v_uint;
dest_value->data[1].v_uint = src_value->data[1].v_uint;
}
static gchar *
gst_value_collect_flagset (GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
if (n_collect_values != 2)
return g_strdup_printf ("not enough value locations for `%s' passed",
G_VALUE_TYPE_NAME (value));
gst_value_set_flagset (value,
(guint) collect_values[0].v_int, (guint) collect_values[1].v_int);
return NULL;
}
static gchar *
gst_value_lcopy_flagset (const GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
guint *flags = collect_values[0].v_pointer;
guint *mask = collect_values[1].v_pointer;
*flags = value->data[0].v_uint;
*mask = value->data[1].v_uint;
return NULL;
}
/**
* gst_value_set_flagset:
* @value: a GValue initialized to %GST_TYPE_FLAG_SET
* @flags: The value of the flags set or unset
* @mask: The mask indicate which flags bits must match for comparisons
*
* Sets @value to the flags and mask values provided in @flags and @mask.
* The @flags value indicates the values of flags, the @mask represents
* which bits in the flag value have been set, and which are "don't care"
*
* Since: 1.6
*/
void
gst_value_set_flagset (GValue * value, guint flags, guint mask)
{
g_return_if_fail (GST_VALUE_HOLDS_FLAG_SET (value));
/* Normalise and only keep flags mentioned in the mask */
value->data[0].v_uint = flags & mask;
value->data[1].v_uint = mask;
}
/**
* gst_value_get_flagset_flags:
* @value: a GValue initialized to #GST_TYPE_FLAG_SET
*
* Retrieve the flags field of a GstFlagSet @value.
*
* Returns: the flags field of the flagset instance.
*
* Since: 1.6
*/
guint
gst_value_get_flagset_flags (const GValue * value)
{
g_return_val_if_fail (GST_VALUE_HOLDS_FLAG_SET (value), 0);
return value->data[0].v_uint;
}
/**
* gst_value_get_flagset_mask:
* @value: a GValue initialized to #GST_TYPE_FLAG_SET
*
* Retrieve the mask field of a GstFlagSet @value.
*
* Returns: the mask field of the flagset instance.
*
* Since: 1.6
*/
guint
gst_value_get_flagset_mask (const GValue * value)
{
g_return_val_if_fail (GST_VALUE_HOLDS_FLAG_SET (value), 1);
return value->data[1].v_uint;
}
static gchar *
gst_value_serialize_flagset (const GValue * value)
{
guint flags = value->data[0].v_uint;
guint mask = value->data[1].v_uint;
GstFlagSetClass *set_klass =
(GstFlagSetClass *) g_type_class_ref (G_VALUE_TYPE (value));
gchar *result;
result = g_strdup_printf ("%x:%x", flags, mask);
/* If this flag set class has an associated GFlags GType, and some
* bits in the mask, serialize the bits in human-readable form to
* aid debugging */
if (mask && set_klass->flags_type) {
GFlagsClass *flags_klass =
(GFlagsClass *) (g_type_class_ref (set_klass->flags_type));
GFlagsValue *fl;
gchar *tmp;
gboolean first = TRUE;
g_return_val_if_fail (flags_klass, NULL);
/* some bits in the mask are set, so serialize one by one, according
* to whether that bit is set or cleared in the flags value */
while (mask) {
fl = g_flags_get_first_value (flags_klass, mask);
if (fl == NULL) {
/* No more bits match in the flags mask - time to stop */
mask = 0;
break;
}
tmp = g_strconcat (result,
first ? ":" : "",
(flags & fl->value) ? "+" : "/", fl->value_nick, NULL);
g_free (result);
result = tmp;
first = FALSE;
/* clear flag */
mask &= ~fl->value;
}
g_type_class_unref (flags_klass);
}
g_type_class_unref (set_klass);
return result;
}
static gboolean
is_valid_flags_string (const gchar * s)
{
/* We're looking to match +this/that+other-thing/not-this-thing type strings */
return g_regex_match_simple ("^([\\+\\/][\\w\\d-]+)+$", s, G_REGEX_CASELESS,
0);
}
static gboolean
gst_value_deserialize_flagset (GValue * dest, const gchar * s)
{
gboolean res = FALSE;
guint flags, mask;
gchar *cur, *next;
if (G_UNLIKELY (s == NULL))
return FALSE;
if (G_UNLIKELY (dest == NULL || !GST_VALUE_HOLDS_FLAG_SET (dest)))
return FALSE;
/* Flagset strings look like %x:%x - hex flags : hex bitmask,
* 32-bit each, or like a concatenated list of flag nicks,
* with either '+' or '/' in front. The first form
* may optionally be followed by ':' and a set of text flag descriptions
* for easier debugging */
/* Try and interpret as hex form first, as it's the most efficient */
/* Read the flags first */
flags = strtoul (s, &next, 16);
if (G_UNLIKELY ((flags == 0 && errno == EINVAL) || s == next))
goto try_as_flags_string;
/* Next char should be a colon */
if (next[0] == ':')
next++;
/* Read the mask */
cur = next;
mask = strtoul (cur, &next, 16);
if (G_UNLIKELY ((mask == 0 && errno == EINVAL) || cur == next))
goto try_as_flags_string;
/* Next char should be NULL terminator, or a ':'. If ':', we need the flag string after */
if (G_UNLIKELY (next[0] == 0)) {
res = TRUE;
goto done;
}
if (next[0] != ':')
return FALSE;
s = next + 1;
if (g_str_equal (g_type_name (G_VALUE_TYPE (dest)), "GstFlagSet")) {
/* If we're parsing a generic flag set, that can mean we're guessing
* at the type in deserialising a GstStructure so at least check that
* we have a valid-looking string, so we don't cause deserialisation of
* other types of strings like 00:01:00:00 - https://bugzilla.gnome.org/show_bug.cgi?id=779755 */
if (is_valid_flags_string (s)) {
res = TRUE;
goto done;
}
return FALSE;
}
/* Otherwise, we already got a hex string for a valid non-generic flagset type */
res = TRUE;
goto done;
try_as_flags_string:
{
const gchar *set_class = g_type_name (G_VALUE_TYPE (dest));
GFlagsClass *flags_klass = NULL;
const gchar *end;
if (g_str_equal (set_class, "GstFlagSet")) {
/* There's no hope to parse the fields of generic flag set if we didn't already
* catch a hex-string above */
return FALSE;
}
/* Flags class is the FlagSet class with 'Set' removed from the end */
end = g_strrstr (set_class, "Set");
if (end != NULL) {
gchar *class_name = g_strndup (set_class, end - set_class);
GType flags_type = g_type_from_name (class_name);
if (flags_type == 0) {
GST_TRACE ("Looking for dynamic type %s", class_name);
gst_dynamic_type_factory_load (class_name);
}
if (flags_type != 0) {
flags_klass = g_type_class_ref (flags_type);
GST_TRACE ("Going to parse %s as %s", s, class_name);
}
g_free (class_name);
}
if (flags_klass) {
res = gst_value_gflags_str_to_flags (flags_klass, s, &flags, &mask);
g_type_class_unref (flags_klass);
}
}
done:
if (res)
gst_value_set_flagset (dest, flags, mask);
return res;
}
static void
gst_value_transform_flagset_string (const GValue * src_value,
GValue * dest_value)
{
dest_value->data[0].v_pointer = gst_value_serialize_flagset (src_value);
}
static void
gst_value_transform_string_flagset (const GValue * src_value,
GValue * dest_value)
{
if (!gst_value_deserialize_flagset (dest_value, src_value->data[0].v_pointer)) {
/* If the deserialize fails, ensure we leave the flags in a
* valid, if incorrect, state */
gst_value_set_flagset (dest_value, 0, 0);
}
}
static gint
gst_value_compare_flagset (const GValue * value1, const GValue * value2)
{
guint v1, v2;
guint m1, m2;
v1 = value1->data[0].v_uint;
v2 = value2->data[0].v_uint;
m1 = value1->data[1].v_uint;
m2 = value2->data[1].v_uint;
if (v1 == v2 && m1 == m2)
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
/***********************
* GstAllocationParams *
***********************/
static gint
gst_value_compare_allocation_params (const GValue * value1,
const GValue * value2)
{
GstAllocationParams *v1, *v2;
v1 = value1->data[0].v_pointer;
v2 = value2->data[0].v_pointer;
if (v1 == NULL && v1 == v2)
return GST_VALUE_EQUAL;
if (v1 == NULL || v2 == NULL)
return GST_VALUE_UNORDERED;
if (v1->flags == v2->flags && v1->align == v2->align &&
v1->prefix == v2->prefix && v1->padding == v2->padding)
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
/************
* GObject *
************/
static gint
gst_value_compare_object (const GValue * value1, const GValue * value2)
{
gpointer v1, v2;
v1 = value1->data[0].v_pointer;
v2 = value2->data[0].v_pointer;
if (v1 == v2)
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
static void
gst_value_transform_object_string (const GValue * src_value,
GValue * dest_value)
{
GstObject *obj;
gchar *str;
obj = g_value_get_object (src_value);
if (obj) {
str =
g_strdup_printf ("(%s) %s", G_OBJECT_TYPE_NAME (obj),
GST_OBJECT_NAME (obj));
} else {
str = g_strdup ("NULL");
}
dest_value->data[0].v_pointer = str;
}
static GTypeInfo _info = {
0, NULL, NULL, NULL, NULL, NULL, 0, 0, NULL, NULL,
};
static GTypeFundamentalInfo _finfo = {
0
};
#define FUNC_VALUE_GET_TYPE_CLASSED(type, name, csize, flags) \
GType _gst_ ## type ## _type = 0; \
\
GType gst_ ## type ## _get_type (void) \
{ \
static volatile GType gst_ ## type ## _type = 0; \
\
if (g_once_init_enter (&gst_ ## type ## _type)) { \
GType _type; \
_info.class_size = csize; \
_finfo.type_flags = flags; \
_info.value_table = & _gst_ ## type ## _value_table; \
_type = g_type_register_fundamental ( \
g_type_fundamental_next (), \
name, &_info, &_finfo, 0); \
_gst_ ## type ## _type = _type; \
g_once_init_leave(&gst_ ## type ## _type, _type); \
} \
\
return gst_ ## type ## _type; \
}
#define FUNC_VALUE_GET_TYPE(type, name) \
FUNC_VALUE_GET_TYPE_CLASSED(type, name, 0, 0)
static const GTypeValueTable _gst_int_range_value_table = {
gst_value_init_int_range,
NULL,
gst_value_copy_int_range,
NULL,
(char *) "ii",
gst_value_collect_int_range, (char *) "pp", gst_value_lcopy_int_range
};
FUNC_VALUE_GET_TYPE (int_range, "GstIntRange");
static const GTypeValueTable _gst_int64_range_value_table = {
gst_value_init_int64_range,
gst_value_free_int64_range,
gst_value_copy_int64_range,
NULL,
(char *) "qq",
gst_value_collect_int64_range,
(char *) "pp", gst_value_lcopy_int64_range
};
FUNC_VALUE_GET_TYPE (int64_range, "GstInt64Range");
static const GTypeValueTable _gst_double_range_value_table = {
gst_value_init_double_range,
NULL,
gst_value_copy_double_range,
NULL,
(char *) "dd",
gst_value_collect_double_range,
(char *) "pp", gst_value_lcopy_double_range
};
FUNC_VALUE_GET_TYPE (double_range, "GstDoubleRange");
static const GTypeValueTable _gst_fraction_range_value_table = {
gst_value_init_fraction_range,
gst_value_free_fraction_range,
gst_value_copy_fraction_range,
NULL,
(char *) "iiii",
gst_value_collect_fraction_range,
(char *) "pppp", gst_value_lcopy_fraction_range
};
FUNC_VALUE_GET_TYPE (fraction_range, "GstFractionRange");
static const GTypeValueTable _gst_value_list_value_table = {
gst_value_init_list_or_array,
gst_value_free_list_or_array,
gst_value_copy_list_or_array,
gst_value_list_or_array_peek_pointer,
(char *) "p",
gst_value_collect_list_or_array,
(char *) "p", gst_value_lcopy_list_or_array
};
FUNC_VALUE_GET_TYPE (value_list, "GstValueList");
static const GTypeValueTable _gst_value_array_value_table = {
gst_value_init_list_or_array,
gst_value_free_list_or_array,
gst_value_copy_list_or_array,
gst_value_list_or_array_peek_pointer,
(char *) "p",
gst_value_collect_list_or_array,
(char *) "p", gst_value_lcopy_list_or_array
};
FUNC_VALUE_GET_TYPE (value_array, "GstValueArray");
static const GTypeValueTable _gst_fraction_value_table = {
gst_value_init_fraction,
NULL,
gst_value_copy_fraction,
NULL,
(char *) "ii",
gst_value_collect_fraction, (char *) "pp", gst_value_lcopy_fraction
};
FUNC_VALUE_GET_TYPE (fraction, "GstFraction");
static const GTypeValueTable _gst_bitmask_value_table = {
gst_value_init_bitmask,
NULL,
gst_value_copy_bitmask,
NULL,
(char *) "q",
gst_value_collect_bitmask, (char *) "p", gst_value_lcopy_bitmask
};
FUNC_VALUE_GET_TYPE (bitmask, "GstBitmask");
static const GTypeValueTable _gst_flagset_value_table = {
gst_value_init_flagset,
NULL,
gst_value_copy_flagset,
NULL,
(char *) "ii",
gst_value_collect_flagset, (char *) "pp", gst_value_lcopy_flagset
};
FUNC_VALUE_GET_TYPE_CLASSED (flagset, "GstFlagSet",
sizeof (GstFlagSetClass), G_TYPE_FLAG_CLASSED | G_TYPE_FLAG_DERIVABLE);
GType
gst_g_thread_get_type (void)
{
return G_TYPE_THREAD;
}
#define SERIAL_VTABLE(t,c,s,d) { t, c, s, d }
#define REGISTER_SERIALIZATION_CONST(_gtype, _type) \
G_STMT_START { \
static const GstValueTable gst_value = \
SERIAL_VTABLE (_gtype, gst_value_compare_ ## _type, \
gst_value_serialize_ ## _type, gst_value_deserialize_ ## _type); \
gst_value_register (&gst_value); \
} G_STMT_END
#define REGISTER_SERIALIZATION(_gtype, _type) \
G_STMT_START { \
static GstValueTable gst_value = \
SERIAL_VTABLE (0, gst_value_compare_ ## _type, \
gst_value_serialize_ ## _type, gst_value_deserialize_ ## _type); \
gst_value.type = _gtype; \
gst_value_register (&gst_value); \
} G_STMT_END
#define REGISTER_SERIALIZATION_NO_COMPARE(_gtype, _type) \
G_STMT_START { \
static GstValueTable gst_value = \
SERIAL_VTABLE (0, NULL, \
gst_value_serialize_ ## _type, gst_value_deserialize_ ## _type); \
gst_value.type = _gtype; \
gst_value_register (&gst_value); \
} G_STMT_END
#define REGISTER_SERIALIZATION_COMPARE_ONLY(_gtype, _type) \
G_STMT_START { \
static GstValueTable gst_value = \
SERIAL_VTABLE (0, gst_value_compare_ ## _type, \
NULL, NULL); \
gst_value.type = _gtype; \
gst_value_register (&gst_value); \
} G_STMT_END
/* These initial sizes are used for the tables
* below, and save a couple of reallocs at startup */
static const gint GST_VALUE_TABLE_DEFAULT_SIZE = 40;
static const gint GST_VALUE_UNION_TABLE_DEFAULT_SIZE = 8;
static const gint GST_VALUE_INTERSECT_TABLE_DEFAULT_SIZE = 16;
static const gint GST_VALUE_SUBTRACT_TABLE_DEFAULT_SIZE = 16;
void
_priv_gst_value_initialize (void)
{
gst_value_table =
g_array_sized_new (FALSE, FALSE, sizeof (GstValueTable),
GST_VALUE_TABLE_DEFAULT_SIZE);
gst_value_hash = g_hash_table_new (NULL, NULL);
gst_value_union_funcs = g_array_sized_new (FALSE, FALSE,
sizeof (GstValueUnionInfo), GST_VALUE_UNION_TABLE_DEFAULT_SIZE);
gst_value_intersect_funcs = g_array_sized_new (FALSE, FALSE,
sizeof (GstValueIntersectInfo), GST_VALUE_INTERSECT_TABLE_DEFAULT_SIZE);
gst_value_subtract_funcs = g_array_sized_new (FALSE, FALSE,
sizeof (GstValueSubtractInfo), GST_VALUE_SUBTRACT_TABLE_DEFAULT_SIZE);
REGISTER_SERIALIZATION (gst_int_range_get_type (), int_range);
REGISTER_SERIALIZATION (gst_int64_range_get_type (), int64_range);
REGISTER_SERIALIZATION (gst_double_range_get_type (), double_range);
REGISTER_SERIALIZATION (gst_fraction_range_get_type (), fraction_range);
REGISTER_SERIALIZATION (gst_value_list_get_type (), value_list);
REGISTER_SERIALIZATION (gst_value_array_get_type (), value_array);
REGISTER_SERIALIZATION (g_value_array_get_type (), g_value_array);
REGISTER_SERIALIZATION (gst_buffer_get_type (), buffer);
REGISTER_SERIALIZATION (gst_sample_get_type (), sample);
REGISTER_SERIALIZATION (gst_fraction_get_type (), fraction);
REGISTER_SERIALIZATION (gst_caps_get_type (), caps);
REGISTER_SERIALIZATION (gst_tag_list_get_type (), tag_list);
REGISTER_SERIALIZATION (G_TYPE_DATE, date);
REGISTER_SERIALIZATION (gst_date_time_get_type (), date_time);
REGISTER_SERIALIZATION (gst_bitmask_get_type (), bitmask);
REGISTER_SERIALIZATION (gst_structure_get_type (), structure);
REGISTER_SERIALIZATION (gst_flagset_get_type (), flagset);
REGISTER_SERIALIZATION_NO_COMPARE (gst_segment_get_type (), segment);
REGISTER_SERIALIZATION_NO_COMPARE (gst_caps_features_get_type (),
caps_features);
REGISTER_SERIALIZATION_COMPARE_ONLY (gst_allocation_params_get_type (),
allocation_params);
REGISTER_SERIALIZATION_COMPARE_ONLY (G_TYPE_OBJECT, object);
REGISTER_SERIALIZATION_CONST (G_TYPE_DOUBLE, double);
REGISTER_SERIALIZATION_CONST (G_TYPE_FLOAT, float);
REGISTER_SERIALIZATION_CONST (G_TYPE_STRING, string);
REGISTER_SERIALIZATION_CONST (G_TYPE_BOOLEAN, boolean);
REGISTER_SERIALIZATION_CONST (G_TYPE_ENUM, enum);
REGISTER_SERIALIZATION_CONST (G_TYPE_FLAGS, gflags);
REGISTER_SERIALIZATION_CONST (G_TYPE_INT, int);
REGISTER_SERIALIZATION_CONST (G_TYPE_INT64, int64);
REGISTER_SERIALIZATION_CONST (G_TYPE_LONG, long);
REGISTER_SERIALIZATION_CONST (G_TYPE_UINT, uint);
REGISTER_SERIALIZATION_CONST (G_TYPE_UINT64, uint64);
REGISTER_SERIALIZATION_CONST (G_TYPE_ULONG, ulong);
REGISTER_SERIALIZATION_CONST (G_TYPE_UCHAR, uchar);
REGISTER_SERIALIZATION (G_TYPE_GTYPE, gtype);
g_value_register_transform_func (GST_TYPE_INT_RANGE, G_TYPE_STRING,
gst_value_transform_int_range_string);
g_value_register_transform_func (GST_TYPE_INT64_RANGE, G_TYPE_STRING,
gst_value_transform_int64_range_string);
g_value_register_transform_func (GST_TYPE_DOUBLE_RANGE, G_TYPE_STRING,
gst_value_transform_double_range_string);
g_value_register_transform_func (GST_TYPE_FRACTION_RANGE, G_TYPE_STRING,
gst_value_transform_fraction_range_string);
g_value_register_transform_func (GST_TYPE_LIST, G_TYPE_STRING,
gst_value_transform_list_string);
g_value_register_transform_func (GST_TYPE_LIST, G_TYPE_VALUE_ARRAY,
gst_value_transform_any_list_g_value_array);
g_value_register_transform_func (GST_TYPE_ARRAY, G_TYPE_STRING,
gst_value_transform_array_string);
g_value_register_transform_func (GST_TYPE_ARRAY, G_TYPE_VALUE_ARRAY,
gst_value_transform_any_list_g_value_array);
g_value_register_transform_func (G_TYPE_VALUE_ARRAY, G_TYPE_STRING,
gst_value_transform_g_value_array_string);
g_value_register_transform_func (G_TYPE_VALUE_ARRAY, GST_TYPE_ARRAY,
gst_value_transform_g_value_array_any_list);
g_value_register_transform_func (G_TYPE_VALUE_ARRAY, GST_TYPE_LIST,
gst_value_transform_g_value_array_any_list);
g_value_register_transform_func (GST_TYPE_FRACTION, G_TYPE_STRING,
gst_value_transform_fraction_string);
g_value_register_transform_func (G_TYPE_STRING, GST_TYPE_FRACTION,
gst_value_transform_string_fraction);
g_value_register_transform_func (GST_TYPE_FRACTION, G_TYPE_DOUBLE,
gst_value_transform_fraction_double);
g_value_register_transform_func (GST_TYPE_FRACTION, G_TYPE_FLOAT,
gst_value_transform_fraction_float);
g_value_register_transform_func (G_TYPE_DOUBLE, GST_TYPE_FRACTION,
gst_value_transform_double_fraction);
g_value_register_transform_func (G_TYPE_FLOAT, GST_TYPE_FRACTION,
gst_value_transform_float_fraction);
g_value_register_transform_func (G_TYPE_DATE, G_TYPE_STRING,
gst_value_transform_date_string);
g_value_register_transform_func (G_TYPE_STRING, G_TYPE_DATE,
gst_value_transform_string_date);
g_value_register_transform_func (GST_TYPE_OBJECT, G_TYPE_STRING,
gst_value_transform_object_string);
g_value_register_transform_func (GST_TYPE_BITMASK, G_TYPE_UINT64,
gst_value_transform_bitmask_uint64);
g_value_register_transform_func (GST_TYPE_BITMASK, G_TYPE_STRING,
gst_value_transform_bitmask_string);
g_value_register_transform_func (G_TYPE_UINT64, GST_TYPE_BITMASK,
gst_value_transform_uint64_bitmask);
g_value_register_transform_func (G_TYPE_STRING, GST_TYPE_BITMASK,
gst_value_transform_string_bitmask);
g_value_register_transform_func (GST_TYPE_FLAG_SET, G_TYPE_STRING,
gst_value_transform_flagset_string);
g_value_register_transform_func (G_TYPE_STRING, GST_TYPE_FLAG_SET,
gst_value_transform_string_flagset);
gst_value_register_intersect_func (G_TYPE_INT, GST_TYPE_INT_RANGE,
gst_value_intersect_int_int_range);
gst_value_register_intersect_func (GST_TYPE_INT_RANGE, GST_TYPE_INT_RANGE,
gst_value_intersect_int_range_int_range);
gst_value_register_intersect_func (G_TYPE_INT64, GST_TYPE_INT64_RANGE,
gst_value_intersect_int64_int64_range);
gst_value_register_intersect_func (GST_TYPE_INT64_RANGE,
GST_TYPE_INT64_RANGE, gst_value_intersect_int64_range_int64_range);
gst_value_register_intersect_func (G_TYPE_DOUBLE, GST_TYPE_DOUBLE_RANGE,
gst_value_intersect_double_double_range);
gst_value_register_intersect_func (GST_TYPE_DOUBLE_RANGE,
GST_TYPE_DOUBLE_RANGE, gst_value_intersect_double_range_double_range);
gst_value_register_intersect_func (GST_TYPE_ARRAY, GST_TYPE_ARRAY,
gst_value_intersect_array);
gst_value_register_intersect_func (GST_TYPE_FRACTION,
GST_TYPE_FRACTION_RANGE, gst_value_intersect_fraction_fraction_range);
gst_value_register_intersect_func (GST_TYPE_FRACTION_RANGE,
GST_TYPE_FRACTION_RANGE,
gst_value_intersect_fraction_range_fraction_range);
gst_value_register_intersect_func (GST_TYPE_FLAG_SET, GST_TYPE_FLAG_SET,
gst_value_intersect_flagset_flagset);
gst_value_register_intersect_func (GST_TYPE_STRUCTURE, GST_TYPE_STRUCTURE,
gst_value_intersect_structure_structure);
gst_value_register_subtract_func (G_TYPE_INT, GST_TYPE_INT_RANGE,
gst_value_subtract_int_int_range);
gst_value_register_subtract_func (GST_TYPE_INT_RANGE, G_TYPE_INT,
gst_value_subtract_int_range_int);
gst_value_register_subtract_func (GST_TYPE_INT_RANGE, GST_TYPE_INT_RANGE,
gst_value_subtract_int_range_int_range);
gst_value_register_subtract_func (G_TYPE_INT64, GST_TYPE_INT64_RANGE,
gst_value_subtract_int64_int64_range);
gst_value_register_subtract_func (GST_TYPE_INT64_RANGE, G_TYPE_INT64,
gst_value_subtract_int64_range_int64);
gst_value_register_subtract_func (GST_TYPE_INT64_RANGE,
GST_TYPE_INT64_RANGE, gst_value_subtract_int64_range_int64_range);
gst_value_register_subtract_func (G_TYPE_DOUBLE, GST_TYPE_DOUBLE_RANGE,
gst_value_subtract_double_double_range);
gst_value_register_subtract_func (GST_TYPE_DOUBLE_RANGE, G_TYPE_DOUBLE,
gst_value_subtract_double_range_double);
gst_value_register_subtract_func (GST_TYPE_DOUBLE_RANGE,
GST_TYPE_DOUBLE_RANGE, gst_value_subtract_double_range_double_range);
gst_value_register_subtract_func (GST_TYPE_FRACTION,
GST_TYPE_FRACTION_RANGE, gst_value_subtract_fraction_fraction_range);
gst_value_register_subtract_func (GST_TYPE_FRACTION_RANGE,
GST_TYPE_FRACTION, gst_value_subtract_fraction_range_fraction);
gst_value_register_subtract_func (GST_TYPE_FRACTION_RANGE,
GST_TYPE_FRACTION_RANGE,
gst_value_subtract_fraction_range_fraction_range);
/* see bug #317246, #64994, #65041 */
{
volatile GType date_type = G_TYPE_DATE;
g_type_name (date_type);
}
gst_value_register_union_func (G_TYPE_INT, GST_TYPE_INT_RANGE,
gst_value_union_int_int_range);
gst_value_register_union_func (GST_TYPE_INT_RANGE, GST_TYPE_INT_RANGE,
gst_value_union_int_range_int_range);
gst_value_register_union_func (GST_TYPE_FLAG_SET, GST_TYPE_FLAG_SET,
gst_value_union_flagset_flagset);
gst_value_register_union_func (GST_TYPE_STRUCTURE, GST_TYPE_STRUCTURE,
gst_value_union_structure_structure);
#if GST_VERSION_NANO == 1
/* If building from git master, check starting array sizes matched actual size
* so we can keep the defines in sync and save a few reallocs on startup */
if (gst_value_table->len > GST_VALUE_TABLE_DEFAULT_SIZE) {
GST_ERROR ("Wrong initial gst_value_table size. "
"Please set GST_VALUE_TABLE_DEFAULT_SIZE to %u in gstvalue.c",
gst_value_table->len);
}
if (gst_value_union_funcs->len > GST_VALUE_UNION_TABLE_DEFAULT_SIZE) {
GST_ERROR ("Wrong initial gst_value_union_funcs table size. "
"Please set GST_VALUE_UNION_TABLE_DEFAULT_SIZE to %u in gstvalue.c",
gst_value_union_funcs->len);
}
if (gst_value_intersect_funcs->len > GST_VALUE_INTERSECT_TABLE_DEFAULT_SIZE) {
GST_ERROR ("Wrong initial gst_value_intersect_funcs table size. "
"Please set GST_VALUE_INTERSECT_TABLE_DEFAULT_SIZE to %u in gstvalue.c",
gst_value_intersect_funcs->len);
}
if (gst_value_subtract_funcs->len > GST_VALUE_SUBTRACT_TABLE_DEFAULT_SIZE) {
GST_ERROR ("Wrong initial gst_value_subtract_funcs table size. "
"Please set GST_VALUE_SUBTRACT_TABLE_DEFAULT_SIZE to %u in gstvalue.c",
gst_value_subtract_funcs->len);
}
#endif
#if 0
/* Implement these if needed */
gst_value_register_union_func (GST_TYPE_FRACTION, GST_TYPE_FRACTION_RANGE,
gst_value_union_fraction_fraction_range);
gst_value_register_union_func (GST_TYPE_FRACTION_RANGE,
GST_TYPE_FRACTION_RANGE, gst_value_union_fraction_range_fraction_range);
#endif
}
static void
gst_flagset_class_init (gpointer g_class, gpointer class_data)
{
GstFlagSetClass *f_class = (GstFlagSetClass *) (g_class);
f_class->flags_type = (GType) GPOINTER_TO_SIZE (class_data);
}
/**
* gst_flagset_register:
* @flags_type: a #GType of a #G_TYPE_FLAGS type.
*
* Create a new sub-class of #GST_TYPE_FLAG_SET
* which will pretty-print the human-readable flags
* when serializing, for easier debugging.
*
* Since: 1.6
*/
GType
gst_flagset_register (GType flags_type)
{
GTypeInfo info = {
sizeof (GstFlagSetClass),
NULL, NULL,
(GClassInitFunc) gst_flagset_class_init,
NULL, GSIZE_TO_POINTER (flags_type), 0, 0, NULL, NULL
};
GType t;
gchar *class_name;
g_return_val_if_fail (G_TYPE_IS_FLAGS (flags_type), 0);
class_name = g_strdup_printf ("%sSet", g_type_name (flags_type));
t = g_type_register_static (GST_TYPE_FLAG_SET,
g_intern_string (class_name), &info, 0);
g_free (class_name);
return t;
}
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