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gstreamer/gst/gstvalue.c
Tim-Philipp Müller e8bfd88f26 gstvalue: don't put GTypes into int variables 
GTypes are not ints and as such are not guaranteed to fit into an int
(with the exception of fundamental types), so we really shouldn't put
them into int variables. Even if a rather unlikely obscure corner case,
this has actually been a problem at some point in the past, see commit
99f16655f4.
2009-06-11 18:48:50 +01:00

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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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:gstvalue
* @short_description: GValue implementations specific
* to GStreamer
*
* GValue implementations specific to GStreamer.
*
* Note that operations on the same GstValue (or GValue) from multiple
* threads may lead to undefined behaviour.
*
* Last reviewed on 2008-03-11 (0.10.18)
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <math.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>
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;
};
static GArray *gst_value_table;
static GHashTable *gst_value_hash;
static GArray *gst_value_union_funcs;
static GArray *gst_value_intersect_funcs;
static GArray *gst_value_subtract_funcs;
/* Forward declarations */
static gint gst_greatest_common_divisor (gint a, gint b);
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_take_and_wrap (gchar * s);
static gchar *gst_string_unwrap (const gchar * s);
static inline GstValueTable *
gst_value_hash_lookup_type (GType type)
{
return g_hash_table_lookup (gst_value_hash, (gpointer) type);
}
static void
gst_value_hash_add_type (GType type, const GstValueTable * table)
{
g_hash_table_insert (gst_value_hash, (gpointer) type, (gpointer) table);
}
/********
* list *
********/
/* two helper functions to serialize/stringify any type of list
* regular lists are done with { }, arrays with < >
*/
static gchar *
gst_value_serialize_any_list (const GValue * value, const gchar * begin,
const gchar * end)
{
guint i;
GArray *array = value->data[0].v_pointer;
GString *s;
GValue *v;
gchar *s_val;
/* estimate minimum string length to minimise re-allocs in GString */
s = g_string_sized_new (2 + (6 * array->len) + 2);
g_string_append (s, begin);
for (i = 0; i < array->len; i++) {
v = &g_array_index (array, GValue, i);
s_val = gst_value_serialize (v);
g_string_append (s, s_val);
g_free (s_val);
if (i < array->len - 1) {
g_string_append_len (s, ", ", 2);
}
}
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;
GArray *array;
GString *s;
guint i;
gchar *list_s;
array = src_value->data[0].v_pointer;
/* estimate minimum string length to minimise re-allocs in GString */
s = g_string_sized_new (2 + (10 * array->len) + 2);
g_string_append (s, begin);
for (i = 0; i < array->len; i++) {
list_value = &g_array_index (array, GValue, 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_LIST || type == GST_TYPE_FRACTION_RANGE) {
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 = g_array_new (FALSE, TRUE, sizeof (GValue));
}
static GArray *
copy_garray_of_gstvalue (const GArray * src)
{
GArray *dest;
guint i;
dest = g_array_sized_new (FALSE, TRUE, sizeof (GValue), src->len);
g_array_set_size (dest, src->len);
for (i = 0; i < src->len; i++) {
gst_value_init_and_copy (&g_array_index (dest, GValue, i),
&g_array_index (src, GValue, 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_garray_of_gstvalue ((GArray *) src_value->data[0].v_pointer);
}
static void
gst_value_free_list_or_array (GValue * value)
{
guint i;
GArray *src = (GArray *) value->data[0].v_pointer;
if ((value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS) == 0) {
for (i = 0; i < src->len; i++) {
g_value_unset (&g_array_index (src, GValue, i));
}
g_array_free (src, TRUE);
}
}
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_garray_of_gstvalue ((GArray *) 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)
{
GArray **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 = (GArray *) value->data[0].v_pointer;
} else {
*dest = copy_garray_of_gstvalue ((GArray *) value->data[0].v_pointer);
}
return NULL;
}
/**
* gst_value_list_append_value:
* @value: a #GValue of type #GST_TYPE_LIST
* @append_value: 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));
gst_value_init_and_copy (&val, append_value);
g_array_append_vals ((GArray *) value->data[0].v_pointer, &val, 1);
}
/**
* 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));
gst_value_init_and_copy (&val, prepend_value);
g_array_prepend_vals ((GArray *) value->data[0].v_pointer, &val, 1);
}
/**
* gst_value_list_concat:
* @dest: 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;
GArray *array;
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));
value1_length =
(GST_VALUE_HOLDS_LIST (value1) ? gst_value_list_get_size (value1) : 1);
value2_length =
(GST_VALUE_HOLDS_LIST (value2) ? gst_value_list_get_size (value2) : 1);
g_value_init (dest, GST_TYPE_LIST);
array = (GArray *) dest->data[0].v_pointer;
g_array_set_size (array, value1_length + value2_length);
if (GST_VALUE_HOLDS_LIST (value1)) {
for (i = 0; i < value1_length; i++) {
gst_value_init_and_copy (&g_array_index (array, GValue, i),
gst_value_list_get_value (value1, i));
}
} else {
gst_value_init_and_copy (&g_array_index (array, GValue, 0), value1);
}
if (GST_VALUE_HOLDS_LIST (value2)) {
for (i = 0; i < value2_length; i++) {
gst_value_init_and_copy (&g_array_index (array, GValue,
i + value1_length), gst_value_list_get_value (value2, i));
}
} else {
gst_value_init_and_copy (&g_array_index (array, GValue, value1_length),
value2);
}
}
/**
* 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 ((GArray *) value->data[0].v_pointer)->len;
}
/**
* 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: 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 < gst_value_list_get_size (value), NULL);
return (const GValue *) &g_array_index ((GArray *) value->data[0].v_pointer,
GValue, 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));
gst_value_init_and_copy (&val, append_value);
g_array_append_vals ((GArray *) value->data[0].v_pointer, &val, 1);
}
/**
* 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));
gst_value_init_and_copy (&val, prepend_value);
g_array_prepend_vals ((GArray *) value->data[0].v_pointer, &val, 1);
}
/**
* 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 ((GArray *) value->data[0].v_pointer)->len;
}
/**
* 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: 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 < gst_value_array_get_size (value), NULL);
return (const GValue *) &g_array_index ((GArray *) value->data[0].v_pointer,
GValue, 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, "< ", " >");
}
/* Do an unordered compare of the contents of a list */
static int
gst_value_compare_list (const GValue * value1, const GValue * value2)
{
guint i, j;
GArray *array1 = value1->data[0].v_pointer;
GArray *array2 = value2->data[0].v_pointer;
GValue *v1;
GValue *v2;
gint len, to_remove;
guint8 *removed;
GstValueCompareFunc compare;
/* get length and do initial length check. */
len = array1->len;
if (len != array2->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 = &g_array_index (array1, GValue, 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 = &g_array_index (array2, GValue, 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 int
gst_value_compare_array (const GValue * value1, const GValue * value2)
{
guint i;
GArray *array1 = value1->data[0].v_pointer;
GArray *array2 = value2->data[0].v_pointer;
GValue *v1;
GValue *v2;
if (array1->len != array2->len)
return GST_VALUE_UNORDERED;
for (i = 0; i < array1->len; i++) {
v1 = &g_array_index (array1, GValue, i);
v2 = &g_array_index (array2, GValue, i);
if (gst_value_compare (v1, v2) != GST_VALUE_EQUAL)
return GST_VALUE_UNORDERED;
}
return GST_VALUE_EQUAL;
}
static gchar *
gst_value_serialize_list (const GValue * value)
{
return gst_value_serialize_any_list (value, "{ ", " }");
}
static gboolean
gst_value_deserialize_list (GValue * dest, const gchar * s)
{
g_warning ("gst_value_deserialize_list: unimplemented");
return FALSE;
}
static gchar *
gst_value_serialize_array (const GValue * value)
{
return gst_value_serialize_any_list (value, "< ", " >");
}
static gboolean
gst_value_deserialize_array (GValue * dest, const gchar * s)
{
g_warning ("gst_value_deserialize_array: unimplemented");
return FALSE;
}
/**********
* fourcc *
**********/
static void
gst_value_init_fourcc (GValue * value)
{
value->data[0].v_int = 0;
}
static void
gst_value_copy_fourcc (const GValue * src_value, GValue * dest_value)
{
dest_value->data[0].v_int = src_value->data[0].v_int;
}
static gchar *
gst_value_collect_fourcc (GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
value->data[0].v_int = collect_values[0].v_int;
return NULL;
}
static gchar *
gst_value_lcopy_fourcc (const GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
guint32 *fourcc_p = collect_values[0].v_pointer;
if (!fourcc_p)
return g_strdup_printf ("value location for `%s' passed as NULL",
G_VALUE_TYPE_NAME (value));
*fourcc_p = value->data[0].v_int;
return NULL;
}
/**
* gst_value_set_fourcc:
* @value: a GValue initialized to #GST_TYPE_FOURCC
* @fourcc: the #guint32 fourcc to set
*
* Sets @value to @fourcc.
*/
void
gst_value_set_fourcc (GValue * value, guint32 fourcc)
{
g_return_if_fail (GST_VALUE_HOLDS_FOURCC (value));
value->data[0].v_int = fourcc;
}
/**
* gst_value_get_fourcc:
* @value: a GValue initialized to #GST_TYPE_FOURCC
*
* Gets the #guint32 fourcc contained in @value.
*
* Returns: the #guint32 fourcc contained in @value.
*/
guint32
gst_value_get_fourcc (const GValue * value)
{
g_return_val_if_fail (GST_VALUE_HOLDS_FOURCC (value), 0);
return value->data[0].v_int;
}
static void
gst_value_transform_fourcc_string (const GValue * src_value,
GValue * dest_value)
{
guint32 fourcc = src_value->data[0].v_int;
if (g_ascii_isprint ((fourcc >> 0) & 0xff) &&
g_ascii_isprint ((fourcc >> 8) & 0xff) &&
g_ascii_isprint ((fourcc >> 16) & 0xff) &&
g_ascii_isprint ((fourcc >> 24) & 0xff)) {
dest_value->data[0].v_pointer =
g_strdup_printf ("%" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (fourcc));
} else {
dest_value->data[0].v_pointer = g_strdup_printf ("0x%08x", fourcc);
}
}
static gint
gst_value_compare_fourcc (const GValue * value1, const GValue * value2)
{
if (value2->data[0].v_int == value1->data[0].v_int)
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
static gchar *
gst_value_serialize_fourcc (const GValue * value)
{
guint32 fourcc = value->data[0].v_int;
if (g_ascii_isalnum ((fourcc >> 0) & 0xff) &&
g_ascii_isalnum ((fourcc >> 8) & 0xff) &&
g_ascii_isalnum ((fourcc >> 16) & 0xff) &&
g_ascii_isalnum ((fourcc >> 24) & 0xff)) {
return g_strdup_printf ("%" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (fourcc));
} else {
return g_strdup_printf ("0x%08x", fourcc);
}
}
static gboolean
gst_value_deserialize_fourcc (GValue * dest, const char *s)
{
gboolean ret = FALSE;
guint32 fourcc = 0;
char *end;
if (strlen (s) == 4) {
fourcc = GST_MAKE_FOURCC (s[0], s[1], s[2], s[3]);
ret = TRUE;
} else if (g_ascii_isdigit (*s)) {
fourcc = strtoul (s, &end, 0);
if (*end == 0) {
ret = TRUE;
}
}
gst_value_set_fourcc (dest, fourcc);
return ret;
}
/*************
* int range *
*************/
static void
gst_value_init_int_range (GValue * value)
{
value->data[0].v_int = 0;
value->data[1].v_int = 0;
}
static void
gst_value_copy_int_range (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_int_range (GValue * value, guint n_collect_values,
GTypeCValue * collect_values, guint collect_flags)
{
value->data[0].v_int = collect_values[0].v_int;
value->data[1].v_int = collect_values[1].v_int;
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 = value->data[0].v_int;
*int_range_end = value->data[1].v_int;
return NULL;
}
/**
* 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)
{
g_return_if_fail (GST_VALUE_HOLDS_INT_RANGE (value));
g_return_if_fail (start < end);
value->data[0].v_int = start;
value->data[1].v_int = end;
}
/**
* 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 value->data[0].v_int;
}
/**
* 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 maxumum 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 value->data[1].v_int;
}
static void
gst_value_transform_int_range_string (const GValue * src_value,
GValue * dest_value)
{
dest_value->data[0].v_pointer = g_strdup_printf ("[%d,%d]",
(int) src_value->data[0].v_int, (int) src_value->data[1].v_int);
}
static gint
gst_value_compare_int_range (const GValue * value1, const GValue * value2)
{
if (value2->data[0].v_int == value1->data[0].v_int &&
value2->data[1].v_int == value1->data[1].v_int)
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
static gchar *
gst_value_serialize_int_range (const GValue * value)
{
return g_strdup_printf ("[ %d, %d ]", value->data[0].v_int,
value->data[1].v_int);
}
static gboolean
gst_value_deserialize_int_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)
{
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));
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 maxumum 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)
{
char 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[0].v_double == value1->data[0].v_double)
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
static gchar *
gst_value_serialize_double_range (const GValue * value)
{
char d1[G_ASCII_DTOSTR_BUF_SIZE];
char 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) {
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 (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)
{
int i;
int *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));
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_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);
g_value_unset (&start);
g_value_unset (&end);
}
/**
* 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: 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), FALSE);
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: 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), FALSE);
vals = (GValue *) value->data[0].v_pointer;
if (vals != NULL) {
return &vals[1];
}
return NULL;
}
static char *
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: the caps to set the value to
*
* Sets the contents of @value to @caps. The actual
* #GstCaps structure is copied before it is used.
*/
void
gst_value_set_caps (GValue * value, const GstCaps * caps)
{
g_return_if_fail (G_VALUE_TYPE (value) == GST_TYPE_CAPS);
g_value_set_boxed (value, caps);
}
/**
* gst_value_get_caps:
* @value: a GValue initialized to GST_TYPE_CAPS
*
* Gets the contents of @value.
*
* Returns: the contents of @value
*/
const GstCaps *
gst_value_get_caps (const GValue * value)
{
g_return_val_if_fail (G_VALUE_TYPE (value) == GST_TYPE_CAPS, NULL);
return (GstCaps *) g_value_get_boxed (value);
}
static char *
gst_value_serialize_caps (const GValue * value)
{
GstCaps *caps = g_value_get_boxed (value);
return gst_caps_to_string (caps);
}
static gboolean
gst_value_deserialize_caps (GValue * dest, const gchar * s)
{
GstCaps *caps;
caps = gst_caps_from_string (s);
if (caps) {
g_value_take_boxed (dest, caps);
return TRUE;
}
return FALSE;
}
/****************
* 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. The actual
*
* Since: 0.10.15
*/
void
gst_value_set_structure (GValue * value, const GstStructure * structure)
{
g_return_if_fail (G_VALUE_TYPE (value) == GST_TYPE_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: the contents of @value
*
* Since: 0.10.15
*/
const GstStructure *
gst_value_get_structure (const GValue * value)
{
g_return_val_if_fail (G_VALUE_TYPE (value) == GST_TYPE_STRUCTURE, NULL);
return (GstStructure *) g_value_get_boxed (value);
}
static char *
gst_value_serialize_structure (const GValue * value)
{
GstStructure *structure = g_value_get_boxed (value);
return 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;
}
/*************
* GstBuffer *
*************/
static int
gst_value_compare_buffer (const GValue * value1, const GValue * value2)
{
GstBuffer *buf1 = GST_BUFFER (gst_value_get_mini_object (value1));
GstBuffer *buf2 = GST_BUFFER (gst_value_get_mini_object (value2));
if (GST_BUFFER_SIZE (buf1) != GST_BUFFER_SIZE (buf2))
return GST_VALUE_UNORDERED;
if (GST_BUFFER_SIZE (buf1) == 0)
return GST_VALUE_EQUAL;
g_assert (GST_BUFFER_DATA (buf1));
g_assert (GST_BUFFER_DATA (buf2));
if (memcmp (GST_BUFFER_DATA (buf1), GST_BUFFER_DATA (buf2),
GST_BUFFER_SIZE (buf1)) == 0)
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
static char *
gst_value_serialize_buffer (const GValue * value)
{
guint8 *data;
int i;
int size;
char *string;
GstBuffer *buffer;
buffer = gst_value_get_buffer (value);
if (buffer == NULL)
return NULL;
data = GST_BUFFER_DATA (buffer);
size = GST_BUFFER_SIZE (buffer);
string = g_malloc (size * 2 + 1);
for (i = 0; i < size; i++) {
sprintf (string + i * 2, "%02x", data[i]);
}
string[size * 2] = 0;
return string;
}
static gboolean
gst_value_deserialize_buffer (GValue * dest, const gchar * s)
{
GstBuffer *buffer;
int len;
char ts[3];
guint8 *data;
int i;
len = strlen (s);
if (len & 1)
goto wrong_length;
buffer = gst_buffer_new_and_alloc (len / 2);
data = GST_BUFFER_DATA (buffer);
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_value_take_buffer (dest, buffer);
return TRUE;
/* ERRORS */
wrong_length:
{
return FALSE;
}
wrong_char:
{
gst_buffer_unref (buffer);
return FALSE;
}
}
/***********
* boolean *
***********/
static int
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 char *
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 char * \
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;
char *end;
gint64 mask = -1;
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; \
char *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; \
}
#define REGISTER_SERIALIZATION(_gtype, _type) \
G_STMT_START { \
static const GstValueTable gst_value = { \
_gtype, \
gst_value_compare_ ## _type, \
gst_value_serialize_ ## _type, \
gst_value_deserialize_ ## _type, \
}; \
\
gst_value_register (&gst_value); \
} G_STMT_END
CREATE_SERIALIZATION (int, INT);
CREATE_SERIALIZATION (int64, INT64);
CREATE_SERIALIZATION (long, LONG);
CREATE_USERIALIZATION (uint, UINT);
CREATE_USERIALIZATION (uint64, UINT64);
CREATE_USERIALIZATION (ulong, ULONG);
/**********
* double *
**********/
static int
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 char *
gst_value_serialize_double (const GValue * value)
{
char 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)
{
double x;
gboolean ret = FALSE;
char *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)
{
double x;
gboolean ret = FALSE;
char *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 (!value1->data[0].v_pointer || !value2->data[0].v_pointer) {
return GST_VALUE_UNORDERED;
} else {
int 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 int
gst_string_measure_wrapping (const gchar * s)
{
int len;
gboolean wrap = FALSE;
if (s == NULL)
return -1;
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++;
}
return wrap ? len : -1;
}
static gchar *
gst_string_wrap_inner (const gchar * s, int 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;
return d;
}
/* Do string wrapping/escaping */
static gchar *
gst_string_wrap (const gchar * s)
{
int len = gst_string_measure_wrapping (s);
if (len < 0)
return g_strdup (s);
return gst_string_wrap_inner (s, len);
}
/* Same as above, but take ownership of the string */
static gchar *
gst_string_take_and_wrap (gchar * s)
{
gchar *out;
int len = gst_string_measure_wrapping (s);
if (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 definately 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 (*s != '"') {
if (!g_utf8_validate (s, -1, NULL))
return FALSE;
g_value_set_string (dest, s);
return TRUE;
} else {
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 (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_name);
}
static gint
gst_value_deserialize_enum_iter_cmp (const GstFormatDefinition * format_def,
const gchar * s)
{
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)) {
const GstFormatDefinition *format_def;
GstIterator *iter;
iter = gst_format_iterate_definitions ();
format_def = gst_iterator_find_custom (iter,
(GCompareFunc) gst_value_deserialize_enum_iter_cmp, (gpointer) s);
g_return_val_if_fail (format_def != NULL, FALSE);
g_value_set_enum (dest, (gint) format_def->value);
gst_iterator_free (iter);
return TRUE;
}
g_return_val_if_fail (en, FALSE);
g_value_set_enum (dest, en->value);
return TRUE;
}
/********
* flags *
********/
/* we just compare the value here */
static gint
gst_value_compare_flags (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_flags (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);
return g_strdup (fl->value_name);
}
/* 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_deserialize_flags (GValue * dest, const gchar * s)
{
GFlagsValue *fl;
gchar *endptr = NULL;
GFlagsClass *klass = (GFlagsClass *) g_type_class_ref (G_VALUE_TYPE (dest));
gchar **split;
guint flags;
gint i;
g_return_val_if_fail (klass, FALSE);
/* split into parts delimited with + */
split = g_strsplit (s, "+", 0);
flags = 0;
i = 0;
/* loop over each part */
while (split[i]) {
if (!(fl = g_flags_get_value_by_name (klass, split[i]))) {
if (!(fl = g_flags_get_value_by_nick (klass, split[i]))) {
gint val = strtol (split[i], &endptr, 0);
/* just or numeric value */
if (endptr && *endptr == '\0') {
flags |= val;
}
}
}
if (fl) {
flags |= fl->value;
}
i++;
}
g_strfreev (split);
g_type_class_unref (klass);
g_value_set_flags (dest, flags);
return TRUE;
}
/*********
* union *
*********/
static gboolean
gst_value_union_int_int_range (GValue * dest, const GValue * src1,
const GValue * src2)
{
if (src2->data[0].v_int <= src1->data[0].v_int &&
src2->data[1].v_int >= src1->data[0].v_int) {
gst_value_init_and_copy (dest, src2);
return TRUE;
}
return FALSE;
}
static gboolean
gst_value_union_int_range_int_range (GValue * dest, const GValue * src1,
const GValue * src2)
{
gint min;
gint max;
min = MAX (src1->data[0].v_int, src2->data[0].v_int);
max = MIN (src1->data[1].v_int, src2->data[1].v_int);
if (min <= max) {
g_value_init (dest, GST_TYPE_INT_RANGE);
gst_value_set_int_range (dest,
MIN (src1->data[0].v_int, src2->data[0].v_int),
MAX (src1->data[1].v_int, src2->data[1].v_int));
return TRUE;
}
return FALSE;
}
/****************
* intersection *
****************/
static gboolean
gst_value_intersect_int_int_range (GValue * dest, const GValue * src1,
const GValue * src2)
{
if (src2->data[0].v_int <= src1->data[0].v_int &&
src2->data[1].v_int >= src1->data[0].v_int) {
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;
min = MAX (src1->data[0].v_int, src2->data[0].v_int);
max = MIN (src1->data[1].v_int, src2->data[1].v_int);
if (min < max) {
g_value_init (dest, GST_TYPE_INT_RANGE);
gst_value_set_int_range (dest, min, max);
return TRUE;
}
if (min == max) {
g_value_init (dest, G_TYPE_INT);
g_value_set_int (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) {
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) {
g_value_init (dest, GST_TYPE_DOUBLE_RANGE);
gst_value_set_double_range (dest, min, max);
return TRUE;
}
if (min == max) {
g_value_init (dest, G_TYPE_DOUBLE);
g_value_set_int (dest, (int) min);
return TRUE;
}
return FALSE;
}
static gboolean
gst_value_intersect_list (GValue * dest, const GValue * value1,
const GValue * value2)
{
guint i, size;
GValue intersection = { 0, };
gboolean ret = FALSE;
size = gst_value_list_get_size (value1);
for (i = 0; i < size; i++) {
const GValue *cur = gst_value_list_get_value (value1, i);
if (gst_value_intersect (&intersection, cur, value2)) {
/* append value */
if (!ret) {
gst_value_init_and_copy (dest, &intersection);
ret = TRUE;
} else if (GST_VALUE_HOLDS_LIST (dest)) {
gst_value_list_append_value (dest, &intersection);
} else {
GValue temp = { 0, };
gst_value_init_and_copy (&temp, dest);
g_value_unset (dest);
gst_value_list_concat (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;
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_value (dest, &val);
g_value_unset (&val);
}
return TRUE;
}
static gboolean
gst_value_intersect_fraction_fraction_range (GValue * dest, const GValue * src1,
const GValue * src2)
{
int 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)) {
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;
int 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) {
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) {
gst_value_init_and_copy (dest, min);
return TRUE;
}
}
return FALSE;
}
/***************
* subtraction *
***************/
static gboolean
gst_value_subtract_int_int_range (GValue * dest, const GValue * minuend,
const GValue * subtrahend)
{
int min = gst_value_get_int_range_min (subtrahend);
int max = gst_value_get_int_range_max (subtrahend);
int val = g_value_get_int (minuend);
/* subtracting a range from an int only works if the int is not in the
* range */
if (val < min || val > max) {
/* and the result is the int */
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)
{
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 (min1 < max1) {
g_value_init (pv1, GST_TYPE_INT_RANGE);
gst_value_set_int_range (pv1, min1, max1);
} 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 (pv2, min2, max2);
} 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 (dest, pv1, pv2);
g_value_unset (pv1);
g_value_unset (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 val = g_value_get_int (subtrahend);
g_return_val_if_fail (min < max, FALSE);
/* value is outside of the range, return range unchanged */
if (val < min || val > max) {
gst_value_init_and_copy (dest, minuend);
return TRUE;
} else {
/* max must be MAXINT too as val <= max */
if (val == G_MAXINT) {
max--;
val--;
}
/* min must be MININT too as val >= max */
if (val == G_MININT) {
min++;
val++;
}
gst_value_create_new_range (dest, min, val - 1, val + 1, max);
}
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 min2 = gst_value_get_int_range_min (subtrahend);
gint max2 = gst_value_get_int_range_max (subtrahend);
if (max2 == G_MAXINT && min2 == G_MININT) {
return FALSE;
} else if (max2 == G_MAXINT) {
return gst_value_create_new_range (dest, min1, MIN (min2 - 1, max1), 1, 0);
} else if (min2 == G_MININT) {
return gst_value_create_new_range (dest, MAX (max2 + 1, min1), max1, 1, 0);
} else {
return gst_value_create_new_range (dest, min1, MIN (min2 - 1, max1),
MAX (max2 + 1, min1), max1);
}
}
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) {
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 */
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 (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 (dest, pv1, pv2);
g_value_unset (pv1);
g_value_unset (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;
GType ltype;
ltype = gst_value_list_get_type ();
size = gst_value_list_get_size (minuend);
for (i = 0; i < size; i++) {
const GValue *cur = gst_value_list_get_value (minuend, i);
if (gst_value_subtract (&subtraction, cur, subtrahend)) {
if (!ret) {
gst_value_init_and_copy (dest, &subtraction);
ret = TRUE;
} else if (G_VALUE_HOLDS (dest, ltype)
&& !G_VALUE_HOLDS (&subtraction, ltype)) {
gst_value_list_append_value (dest, &subtraction);
} else {
GValue temp = { 0, };
gst_value_init_and_copy (&temp, dest);
g_value_unset (dest);
gst_value_list_concat (dest, &temp, &subtraction);
g_value_unset (&temp);
}
g_value_unset (&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 = gst_value_list_get_size (subtrahend);
for (i = 0; i < size; i++) {
const GValue *cur = gst_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;
}
}
gst_value_init_and_copy (dest, result);
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 */
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 */
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);
int 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 (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 (dest, pv1, pv2);
g_value_unset (pv1);
g_value_unset (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)) {
best = NULL;
for (i = 0; i < gst_value_table->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;
}
/**
* 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)
{
if (G_VALUE_TYPE (value1) != G_VALUE_TYPE (value2))
return FALSE;
return gst_value_get_compare_func (value1) != NULL;
}
/**
* 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: A #GstValueCompareType value
*/
gint
gst_value_compare (const GValue * value1, const GValue * value2)
{
GstValueCompareFunc compare;
if (G_VALUE_TYPE (value1) != G_VALUE_TYPE (value2))
return GST_VALUE_UNORDERED;
compare = gst_value_get_compare_func (value1);
if (compare) {
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_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: A #GstValueCompareType value
*/
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;
for (i = 0; i < gst_value_union_funcs->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: the destination value
* @value1: a value to union
* @value2: another value to union
*
* Creates a GValue cooresponding to the union of @value1 and @value2.
*
* Returns: always returns %TRUE
*/
/* FIXME: change return type to 'void'? */
gboolean
gst_value_union (GValue * dest, const GValue * value1, const GValue * value2)
{
GstValueUnionInfo *union_info;
guint i;
for (i = 0; i < gst_value_union_funcs->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)) {
if (union_info->func (dest, value1, value2)) {
return TRUE;
}
}
if (union_info->type1 == G_VALUE_TYPE (value2) &&
union_info->type2 == G_VALUE_TYPE (value1)) {
if (union_info->func (dest, value2, value1)) {
return TRUE;
}
}
}
gst_value_list_concat (dest, value1, value2);
return TRUE;
}
/**
* gst_value_register_union_func:
* @type1: a type to union
* @type2: another type to union
* @func: a function that implments creating a union between the two types
*
* Registers a union function that can create a union between GValues
* 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().
*/
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, or if there is a method (registered by
* gst_value_register_intersection_func()) to calculate the intersection.
*
* Returns: TRUE if the values can intersect
*/
gboolean
gst_value_can_intersect (const GValue * value1, const GValue * value2)
{
GstValueIntersectInfo *intersect_info;
guint i;
GType ltype, type1, type2;
ltype = gst_value_list_get_type ();
/* special cases */
if (G_VALUE_HOLDS (value1, ltype) || G_VALUE_HOLDS (value2, ltype))
return TRUE;
type1 = G_VALUE_TYPE (value1);
type2 = G_VALUE_TYPE (value2);
for (i = 0; i < gst_value_intersect_funcs->len; i++) {
intersect_info = &g_array_index (gst_value_intersect_funcs,
GstValueIntersectInfo, i);
if (intersect_info->type1 == intersect_info->type2 &&
intersect_info->type1 == type1 && intersect_info->type2 == type2)
return TRUE;
}
return gst_value_can_compare (value1, value2);
}
/**
* gst_value_intersect:
* @dest: a uninitialized #GValue that will hold the calculated
* intersection value
* @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. 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;
GType ltype, type1, type2;
ltype = gst_value_list_get_type ();
/* special cases first */
if (G_VALUE_HOLDS (value1, ltype))
return gst_value_intersect_list (dest, value1, value2);
if (G_VALUE_HOLDS (value2, ltype))
return gst_value_intersect_list (dest, value2, value1);
if (gst_value_compare (value1, value2) == GST_VALUE_EQUAL) {
gst_value_init_and_copy (dest, value1);
return TRUE;
}
type1 = G_VALUE_TYPE (value1);
type2 = G_VALUE_TYPE (value2);
for (i = 0; i < gst_value_intersect_funcs->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);
}
}
return FALSE;
}
/**
* gst_value_register_intersect_func:
* @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().
*/
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: the destination value for the result if the subtraction is not empty
* @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;
GType ltype, mtype, stype;
ltype = gst_value_list_get_type ();
/* special cases first */
if (G_VALUE_HOLDS (minuend, ltype))
return gst_value_subtract_from_list (dest, minuend, subtrahend);
if (G_VALUE_HOLDS (subtrahend, ltype))
return gst_value_subtract_list (dest, minuend, subtrahend);
mtype = G_VALUE_TYPE (minuend);
stype = G_VALUE_TYPE (subtrahend);
for (i = 0; i < gst_value_subtract_funcs->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 (minuend, subtrahend) != GST_VALUE_EQUAL) {
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;
GType ltype, mtype, stype;
ltype = gst_value_list_get_type ();
/* special cases */
if (G_VALUE_HOLDS (minuend, ltype) || G_VALUE_HOLDS (subtrahend, ltype))
return TRUE;
mtype = G_VALUE_TYPE (minuend);
stype = G_VALUE_TYPE (subtrahend);
for (i = 0; i < gst_value_subtract_funcs->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 (minuend, subtrahend);
}
/**
* gst_value_register_subtract_func:
* @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().
*/
void
gst_value_register_subtract_func (GType minuend_type, GType subtrahend_type,
GstValueSubtractFunc func)
{
GstValueSubtractInfo info;
/* one type must be unfixed, other subtractions can be done as comparisons */
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 #GValues of a given
* type. Each type can only be added once.
*/
void
gst_value_register (const GstValueTable * table)
{
GstValueTable *found;
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: 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_value_init (dest, G_VALUE_TYPE (src));
g_value_copy (src, dest);
}
/**
* 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().
*
* Returns: the serialization for @value or NULL if none exists
*/
gchar *
gst_value_serialize (const GValue * value)
{
guint i;
GValue s_val = { 0 };
GstValueTable *table, *best;
char *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)) {
best = NULL;
for (i = 0; i < gst_value_table->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: #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;
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)) {
best = NULL;
for (i = 0; i < gst_value_table->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;
}
/**
* 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_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;
}
return gst_type_is_fixed (type);
}
/************
* fraction *
************/
/* helper functions */
/* Finds the greatest common divisor.
* Returns 1 if none other found.
* This is Euclid's algorithm. */
static gint
gst_greatest_common_divisor (gint a, gint b)
{
while (b != 0) {
int temp = a;
a = b;
b = temp % b;
}
return ABS (a);
}
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)
{
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_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 GValues containing a GstFraction 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 gcd, n1, n2, d1, d2;
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;
gcd = gst_greatest_common_divisor (n1, d2);
n1 /= gcd;
d2 /= gcd;
gcd = gst_greatest_common_divisor (n2, d1);
n2 /= gcd;
d1 /= gcd;
g_return_val_if_fail (n1 == 0 || G_MAXINT / ABS (n1) >= ABS (n2), FALSE);
g_return_val_if_fail (G_MAXINT / ABS (d1) >= ABS (d2), FALSE);
gst_value_set_fraction (product, n1 * n2, d1 * d2);
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;
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 (n1 == 0) {
gst_value_set_fraction (dest, -n2, d2);
return TRUE;
}
if (n2 == 0) {
gst_value_set_fraction (dest, n1, d1);
return TRUE;
}
g_return_val_if_fail (n1 == 0 || G_MAXINT / ABS (n1) >= ABS (d2), FALSE);
g_return_val_if_fail (G_MAXINT / ABS (d1) >= ABS (n2), FALSE);
g_return_val_if_fail (G_MAXINT / ABS (d1) >= ABS (d2), FALSE);
gst_value_set_fraction (dest, (n1 * d2) - (n2 * d1), d1 * d2);
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;
if (G_UNLIKELY (s == NULL))
return FALSE;
if (G_UNLIKELY (dest == NULL || !GST_VALUE_HOLDS_FRACTION (dest)))
return FALSE;
if (sscanf (s, "%d/%d", &num, &den) == 2) {
gst_value_set_fraction (dest, num, den);
return TRUE;
}
if (sscanf (s, "%d", &num) == 1) {
gst_value_set_fraction (dest, num, 1);
return TRUE;
}
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);
}
#define MAX_TERMS 30
#define MIN_DIVISOR 1.0e-10
#define MAX_ERROR 1.0e-20
/* use continued fractions to transform a double into a fraction,
* see http://mathforum.org/dr.math/faq/faq.fractions.html#decfrac.
* This algorithm takes care of overflows.
*/
static void
gst_value_transform_double_fraction (const GValue * src_value,
GValue * dest_value)
{
gdouble V, F; /* double being converted */
gint N, D; /* will contain the result */
gint A; /* current term in continued fraction */
gint64 N1, D1; /* numerator, denominator of last approx */
gint64 N2, D2; /* numerator, denominator of previous approx */
gint i;
gboolean negative = FALSE;
/* initialize fraction being converted */
F = src_value->data[0].v_double;
if (F < 0.0) {
F = -F;
negative = TRUE;
}
V = F;
/* initialize fractions with 1/0, 0/1 */
N1 = 1;
D1 = 0;
N2 = 0;
D2 = 1;
N = 1;
D = 1;
for (i = 0; i < MAX_TERMS; i++) {
/* get next term */
A = (gint) F; /* no floor() needed, F is always >= 0 */
/* get new divisor */
F = F - A;
/* calculate new fraction in temp */
N2 = N1 * A + N2;
D2 = D1 * A + D2;
/* guard against overflow */
if (N2 > G_MAXINT || D2 > G_MAXINT) {
break;
}
N = N2;
D = D2;
/* save last two fractions */
N2 = N1;
D2 = D1;
N1 = N;
D1 = D;
/* quit if dividing by zero or close enough to target */
if (F < MIN_DIVISOR || fabs (V - ((gdouble) N) / D) < MAX_ERROR) {
break;
}
/* Take reciprocal */
F = 1 / F;
}
/* fix for overflow */
if (D == 0) {
N = G_MAXINT;
D = 1;
}
/* fix for negative */
if (negative)
N = -N;
/* will also simplify */
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 gint
gst_value_compare_fraction (const GValue * value1, const GValue * value2)
{
gint n1, n2;
gint d1, d2;
gint64 new_num_1;
gint64 new_num_2;
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;
/* extend to 64 bits */
new_num_1 = ((gint64) n1) * d2;
new_num_2 = ((gint64) n2) * d1;
if (new_num_1 < new_num_2)
return GST_VALUE_LESS_THAN;
if (new_num_1 > new_num_2)
return GST_VALUE_GREATER_THAN;
/* new_num_1 == new_num_2 implies that both denominators must have
* been 0, beause otherwise simplification would have caught the
* equivalence */
return GST_VALUE_UNORDERED;
}
/*********
* GDate *
*********/
/**
* gst_value_set_date:
* @value: a GValue initialized to GST_TYPE_DATE
* @date: the date to set the value to
*
* Sets the contents of @value to coorespond to @date. The actual
* #GDate structure is copied before it is used.
*/
void
gst_value_set_date (GValue * value, const GDate * date)
{
g_return_if_fail (G_VALUE_TYPE (value) == GST_TYPE_DATE);
g_return_if_fail (g_date_valid (date));
g_value_set_boxed (value, date);
}
/**
* gst_value_get_date:
* @value: a GValue initialized to GST_TYPE_DATE
*
* Gets the contents of @value.
*
* Returns: the contents of @value
*/
const GDate *
gst_value_get_date (const GValue * value)
{
g_return_val_if_fail (G_VALUE_TYPE (value) == GST_TYPE_DATE, NULL);
return (const GDate *) g_value_get_boxed (value);
}
static gpointer
gst_date_copy (gpointer boxed)
{
const GDate *date = (const GDate *) boxed;
if (!g_date_valid (date)) {
GST_WARNING ("invalid GDate");
return NULL;
}
return g_date_new_julian (g_date_get_julian (date));
}
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 char *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;
}
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);
}
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(type, name) \
GType gst_ ## type ## _get_type (void) \
{ \
static GType gst_ ## type ## _type = 0; \
\
if (G_UNLIKELY (gst_ ## type ## _type == 0)) { \
_info.value_table = & _gst_ ## type ## _value_table; \
gst_ ## type ## _type = g_type_register_fundamental ( \
g_type_fundamental_next (), \
name, &_info, &_finfo, 0); \
} \
\
return gst_ ## type ## _type; \
}
static const GTypeValueTable _gst_fourcc_value_table = {
gst_value_init_fourcc,
NULL,
gst_value_copy_fourcc,
NULL,
"i",
gst_value_collect_fourcc,
"p",
gst_value_lcopy_fourcc
};
FUNC_VALUE_GET_TYPE (fourcc, "GstFourcc");
static const GTypeValueTable _gst_int_range_value_table = {
gst_value_init_int_range,
NULL,
gst_value_copy_int_range,
NULL,
"ii",
gst_value_collect_int_range,
"pp",
gst_value_lcopy_int_range
};
FUNC_VALUE_GET_TYPE (int_range, "GstIntRange");
static const GTypeValueTable _gst_double_range_value_table = {
gst_value_init_double_range,
NULL,
gst_value_copy_double_range,
NULL,
"dd",
gst_value_collect_double_range,
"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,
"iiii",
gst_value_collect_fraction_range,
"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,
"p",
gst_value_collect_list_or_array,
"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,
"p",
gst_value_collect_list_or_array,
"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,
"ii",
gst_value_collect_fraction,
"pp",
gst_value_lcopy_fraction
};
FUNC_VALUE_GET_TYPE (fraction, "GstFraction");
GType
gst_date_get_type (void)
{
static GType gst_date_type = 0;
if (G_UNLIKELY (gst_date_type == 0)) {
/* FIXME 0.11: we require GLib 2.8 already
* Not using G_TYPE_DATE here on purpose, even if we could
* if GLIB_CHECK_VERSION(2,8,0) was true: we don't want the
* serialised strings to have different type strings depending
* on what version is used, so FIXME when we require GLib-2.8 */
gst_date_type = g_boxed_type_register_static ("GstDate",
(GBoxedCopyFunc) gst_date_copy, (GBoxedFreeFunc) g_date_free);
}
return gst_date_type;
}
void
_gst_value_initialize (void)
{
gst_value_table = g_array_new (FALSE, FALSE, sizeof (GstValueTable));
gst_value_hash = g_hash_table_new (NULL, NULL);
gst_value_union_funcs = g_array_new (FALSE, FALSE,
sizeof (GstValueUnionInfo));
gst_value_intersect_funcs = g_array_new (FALSE, FALSE,
sizeof (GstValueIntersectInfo));
gst_value_subtract_funcs = g_array_new (FALSE, FALSE,
sizeof (GstValueSubtractInfo));
{
static GstValueTable gst_value = {
0,
gst_value_compare_fourcc,
gst_value_serialize_fourcc,
gst_value_deserialize_fourcc,
};
gst_value.type = gst_fourcc_get_type ();
gst_value_register (&gst_value);
}
{
static GstValueTable gst_value = {
0,
gst_value_compare_int_range,
gst_value_serialize_int_range,
gst_value_deserialize_int_range,
};
gst_value.type = gst_int_range_get_type ();
gst_value_register (&gst_value);
}
{
static GstValueTable gst_value = {
0,
gst_value_compare_double_range,
gst_value_serialize_double_range,
gst_value_deserialize_double_range,
};
gst_value.type = gst_double_range_get_type ();
gst_value_register (&gst_value);
}
{
static GstValueTable gst_value = {
0,
gst_value_compare_fraction_range,
gst_value_serialize_fraction_range,
gst_value_deserialize_fraction_range,
};
gst_value.type = gst_fraction_range_get_type ();
gst_value_register (&gst_value);
}
{
static GstValueTable gst_value = {
0,
gst_value_compare_list,
gst_value_serialize_list,
gst_value_deserialize_list,
};
gst_value.type = gst_value_list_get_type ();
gst_value_register (&gst_value);
}
{
static GstValueTable gst_value = {
0,
gst_value_compare_array,
gst_value_serialize_array,
gst_value_deserialize_array,
};
gst_value.type = gst_value_array_get_type ();
gst_value_register (&gst_value);
}
{
#if 0
static const GTypeValueTable value_table = {
gst_value_init_buffer,
NULL,
gst_value_copy_buffer,
NULL,
"i",
NULL, /*gst_value_collect_buffer, */
"p",
NULL /*gst_value_lcopy_buffer */
};
#endif
static GstValueTable gst_value = {
0,
gst_value_compare_buffer,
gst_value_serialize_buffer,
gst_value_deserialize_buffer,
};
gst_value.type = GST_TYPE_BUFFER;
gst_value_register (&gst_value);
}
{
static GstValueTable gst_value = {
0,
gst_value_compare_fraction,
gst_value_serialize_fraction,
gst_value_deserialize_fraction,
};
gst_value.type = gst_fraction_get_type ();
gst_value_register (&gst_value);
}
{
static GstValueTable gst_value = {
0,
NULL,
gst_value_serialize_caps,
gst_value_deserialize_caps,
};
gst_value.type = GST_TYPE_CAPS;
gst_value_register (&gst_value);
}
{
static GstValueTable gst_value = {
0,
NULL,
gst_value_serialize_structure,
gst_value_deserialize_structure,
};
gst_value.type = GST_TYPE_STRUCTURE;
gst_value_register (&gst_value);
}
{
static GstValueTable gst_value = {
0,
gst_value_compare_date,
gst_value_serialize_date,
gst_value_deserialize_date,
};
gst_value.type = gst_date_get_type ();
gst_value_register (&gst_value);
}
REGISTER_SERIALIZATION (G_TYPE_DOUBLE, double);
REGISTER_SERIALIZATION (G_TYPE_FLOAT, float);
REGISTER_SERIALIZATION (G_TYPE_STRING, string);
REGISTER_SERIALIZATION (G_TYPE_BOOLEAN, boolean);
REGISTER_SERIALIZATION (G_TYPE_ENUM, enum);
REGISTER_SERIALIZATION (G_TYPE_FLAGS, flags);
REGISTER_SERIALIZATION (G_TYPE_INT, int);
REGISTER_SERIALIZATION (G_TYPE_INT64, int64);
REGISTER_SERIALIZATION (G_TYPE_LONG, long);
REGISTER_SERIALIZATION (G_TYPE_UINT, uint);
REGISTER_SERIALIZATION (G_TYPE_UINT64, uint64);
REGISTER_SERIALIZATION (G_TYPE_ULONG, ulong);
g_value_register_transform_func (GST_TYPE_FOURCC, G_TYPE_STRING,
gst_value_transform_fourcc_string);
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_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_ARRAY, G_TYPE_STRING,
gst_value_transform_array_string);
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 (G_TYPE_DOUBLE, GST_TYPE_FRACTION,
gst_value_transform_double_fraction);
g_value_register_transform_func (GST_TYPE_DATE, G_TYPE_STRING,
gst_value_transform_date_string);
g_value_register_transform_func (G_TYPE_STRING, GST_TYPE_DATE,
gst_value_transform_string_date);
g_value_register_transform_func (GST_TYPE_OBJECT, G_TYPE_STRING,
gst_value_transform_object_string);
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_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_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_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);
#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
}
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