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gstreamer/gst/gstvalue.c
Benjamin Otte 6eb8a092a4 gst/gstvalue.c: add comparison function for buffers 
Original commit message from CVS:
* gst/gstvalue.c: (gst_value_compare_buffer),
(_gst_value_initialize):
add comparison function for buffers
2004-04-23 01:20:59 +00:00

2234 lines
55 KiB
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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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include <ctype.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;
};
GType gst_type_fourcc;
GType gst_type_fourcc;
GType gst_type_int_range;
GType gst_type_double_range;
GType gst_type_list;
static GArray *gst_value_table;
static GArray *gst_value_union_funcs;
static GArray *gst_value_intersect_funcs;
static GArray *gst_value_subtract_funcs;
/*************************************/
/* list */
static void
gst_value_init_list (GValue * value)
{
value->data[0].v_pointer = g_array_new (FALSE, TRUE, sizeof (GValue));
}
static GArray *
gst_value_list_array_copy (const GArray * src)
{
GArray *dest;
gint 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 (const GValue * src_value, GValue * dest_value)
{
dest_value->data[0].v_pointer =
gst_value_list_array_copy ((GArray *) src_value->data[0].v_pointer);
}
static void
gst_value_free_list (GValue * value)
{
gint 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_peek_pointer (const GValue * value)
{
return value->data[0].v_pointer;
}
static gchar *
gst_value_collect_list (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 =
gst_value_list_array_copy ((GArray *) collect_values[0].v_pointer);
}
return NULL;
}
static gchar *
gst_value_lcopy_list (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 = gst_value_list_array_copy ((GArray *) value->data[0].v_pointer);
}
return NULL;
}
/**
* gst_value_list_prepend_value:
* @value: a GstValueList to prepend a value to
* @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_append_value:
* @value: a GstValueList to append a value to
* @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_get_size:
* @value: a GstValueList
*
* 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 GstValueList
* @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_list_concat:
* @dest: an uninitialized #GValue to take the result
* @value1: first value to put into the union
* @value2: second value to put into the union
*
* Concatenates copies of value1 and value2 into a list. The value
* @dest is 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);
}
}
static void
gst_value_transform_list_string (const GValue * src_value, GValue * dest_value)
{
GValue *list_value;
GArray *array;
GString *s;
int i;
char *list_s;
array = src_value->data[0].v_pointer;
s = g_string_new ("{ ");
for (i = 0; i < array->len; i++) {
list_value = &g_array_index (array, GValue, i);
if (i != 0) {
g_string_append (s, ", ");
}
list_s = g_strdup_value_contents (list_value);
g_string_append (s, list_s);
g_free (list_s);
}
g_string_append (s, " }");
dest_value->data[0].v_pointer = g_string_free (s, FALSE);
}
static int
gst_value_compare_list (const GValue * value1, const GValue * value2)
{
int i, j;
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);
for (j = 0; j < array1->len; j++) {
v2 = &g_array_index (array2, GValue, j);
if (gst_value_compare (v1, v2) == GST_VALUE_EQUAL)
break;
}
if (j == array1->len) {
return GST_VALUE_UNORDERED;
}
}
return GST_VALUE_EQUAL;
}
static char *
gst_value_serialize_list (const GValue * value)
{
int i;
GArray *array = value->data[0].v_pointer;
GString *s;
GValue *v;
gchar *s_val;
s = g_string_new ("{ ");
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 (s, ", ");
}
}
g_string_append (s, " }");
return g_string_free (s, FALSE);
}
static gboolean
gst_value_deserialize_list (GValue * dest, const char *s)
{
g_warning ("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 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 fourcc contained in @value.
*
* Returns: the 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 int
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 char *
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)
{
/* FIXME */
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, int start, int end)
{
g_return_if_fail (GST_VALUE_HOLDS_INT_RANGE (value));
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 minumum of the range
*/
int
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
*/
int
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 int
gst_value_compare_int_range (const GValue * value1, const GValue * value2)
{
if (value2->data[0].v_int == value1->data[0].v_int &&
value2->data[0].v_int == value1->data[0].v_int)
return GST_VALUE_EQUAL;
return GST_VALUE_UNORDERED;
}
static char *
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 char *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, double start, double 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 minumum of the range
*/
double
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
*/
double
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 int
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 char *
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 char *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 coorespond 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);
}
/*************************************/
/* GstBuffer */
static int
gst_value_compare_buffer (const GValue * value1, const GValue * value2)
{
GstBuffer *buf1 = g_value_get_boxed (value1);
GstBuffer *buf2 = g_value_get_boxed (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 = g_value_get_boxed (value);
data = GST_BUFFER_DATA (buffer);
size = GST_BUFFER_SIZE (buffer);
string = 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 char *s)
{
GstBuffer *buffer;
gboolean ret = TRUE;
int len;
char ts[3];
guint8 *data;
int i;
len = strlen (s);
if (len & 1)
return FALSE;
buffer = gst_buffer_new_and_alloc (len / 2);
data = GST_BUFFER_DATA (buffer);
for (i = 0; i < len / 2; i++) {
if (!isxdigit (s[i * 2]) || !isxdigit (s[i * 2 + 1])) {
ret = FALSE;
break;
}
ts[0] = s[i * 2 + 0];
ts[1] = s[i * 2 + 1];
ts[2] = 0;
data[i] = strtoul (ts, NULL, 16);
}
if (ret) {
g_value_set_boxed (dest, buffer);
return TRUE;
} else {
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 char *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;
}
/*************************************/
/* int */
static int
gst_value_compare_int (const GValue * value1, const GValue * value2)
{
if (value1->data[0].v_int > value2->data[0].v_int)
return GST_VALUE_GREATER_THAN;
if (value1->data[0].v_int < value2->data[0].v_int)
return GST_VALUE_LESS_THAN;
return GST_VALUE_EQUAL;
}
static char *
gst_value_serialize_int (const GValue * value)
{
return g_strdup_printf ("%d", value->data[0].v_int);
}
static int
gst_strtoi (const char *s, char **end, int base)
{
int i;
if (s[0] == '-') {
i = -(int) strtoul (s + 1, end, base);
} else {
i = strtoul (s, end, base);
}
return i;
}
static gboolean
gst_value_deserialize_int (GValue * dest, const char *s)
{
int x;
char *end;
gboolean ret = FALSE;
x = gst_strtoi (s, &end, 0);
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 = G_MININT;
ret = TRUE;
} else if (g_ascii_strcasecmp (s, "max") == 0) {
x = G_MAXINT;
ret = TRUE;
}
}
if (ret) {
g_value_set_int (dest, x);
}
return ret;
}
/*************************************/
/* 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 char *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;
}
/*************************************/
/* string */
static int
gst_value_compare_string (const GValue * value1, const GValue * value2)
{
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;
}
#define GST_ASCII_IS_STRING(c) (g_ascii_isalnum((c)) || ((c) == '_') || \
((c) == '-') || ((c) == '+') || ((c) == '/') || ((c) == ':') || \
((c) == '.'))
static gchar *
gst_string_wrap (const char *s)
{
const gchar *t;
int len;
gchar *d, *e;
gboolean wrap = FALSE;
len = 0;
t = s;
while (*t) {
if (GST_ASCII_IS_STRING (*t)) {
len++;
} else if (*t < 0x20 || *t >= 0x7f) {
wrap = TRUE;
len += 4;
} else {
wrap = TRUE;
len += 2;
}
t++;
}
if (!wrap)
return strdup (s);
e = d = g_malloc (len + 3);
*e++ = '\"';
t = s;
while (*t) {
if (GST_ASCII_IS_STRING (*t)) {
*e++ = *t++;
} else if (*t < 0x20 || *t >= 0x7f) {
*e++ = '\\';
*e++ = '0' + ((*t) >> 6);
*e++ = '0' + (((*t) >> 3) & 0x7);
*e++ = '0' + ((*t++) & 0x7);
} else {
*e++ = '\\';
*e++ = *t++;
}
}
*e++ = '\"';
*e = 0;
return d;
}
static char *
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 char *s)
{
g_value_set_string (dest, s);
return TRUE;
}
/*************************************/
/* unions */
static gboolean
gst_value_union_int_int_range (GValue * dest, const GValue * src1,
const GValue * src2)
{
g_return_val_if_fail (G_VALUE_TYPE (src1) == G_TYPE_INT, FALSE);
g_return_val_if_fail (G_VALUE_TYPE (src2) == GST_TYPE_INT_RANGE, FALSE);
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)
{
int min;
int max;
g_return_val_if_fail (G_VALUE_TYPE (src1) == GST_TYPE_INT_RANGE, FALSE);
g_return_val_if_fail (G_VALUE_TYPE (src2) == GST_TYPE_INT_RANGE, FALSE);
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)
{
g_return_val_if_fail (G_VALUE_TYPE (src1) == G_TYPE_INT, FALSE);
g_return_val_if_fail (G_VALUE_TYPE (src2) == GST_TYPE_INT_RANGE, FALSE);
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)
{
int min;
int max;
g_return_val_if_fail (G_VALUE_TYPE (src1) == GST_TYPE_INT_RANGE, FALSE);
g_return_val_if_fail (G_VALUE_TYPE (src2) == GST_TYPE_INT_RANGE, FALSE);
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)
{
g_return_val_if_fail (G_VALUE_TYPE (src1) == G_TYPE_DOUBLE, FALSE);
g_return_val_if_fail (G_VALUE_TYPE (src2) == GST_TYPE_DOUBLE_RANGE, FALSE);
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)
{
double min;
double max;
g_return_val_if_fail (G_VALUE_TYPE (src1) == GST_TYPE_DOUBLE_RANGE, FALSE);
g_return_val_if_fail (G_VALUE_TYPE (src2) == GST_TYPE_DOUBLE_RANGE, FALSE);
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, 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;
g_return_val_if_fail (GST_VALUE_HOLDS_LIST (value1), 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 (&intersection);
}
}
return ret;
}
/*************************************/
/* 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);
if (val < min || val > max) {
gst_value_init_and_copy (dest, minuend);
return TRUE;
}
return FALSE;
}
static gboolean
gst_value_create_new_range (GValue * dest, int min1, int max1, int min2,
int 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)
{
int min = gst_value_get_int_range_min (minuend);
int max = gst_value_get_int_range_max (minuend);
int val = g_value_get_int (subtrahend);
g_return_val_if_fail (min < max, FALSE);
if (val < min || val > max) {
gst_value_init_and_copy (dest, minuend);
return TRUE;
} else {
if (val == G_MAXINT) {
max--;
val--;
}
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)
{
int min1 = gst_value_get_int_range_min (minuend);
int max1 = gst_value_get_int_range_max (minuend);
int min2 = gst_value_get_int_range_min (subtrahend);
int 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)
{
double min = gst_value_get_double_range_min (subtrahend);
double max = gst_value_get_double_range_max (subtrahend);
double 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)
{
/* FIXME! */
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)
{
/* FIXME! */
/* done like with ints */
double min1 = gst_value_get_double_range_min (minuend);
double max2 = gst_value_get_double_range_max (minuend);
double max1 = MIN (gst_value_get_double_range_min (subtrahend), max2);
double 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;
g_return_val_if_fail (GST_VALUE_HOLDS_LIST (minuend), FALSE);
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 (GST_VALUE_HOLDS_LIST (dest)
&& GST_VALUE_HOLDS_LIST (&subtraction)) {
/* unroll */
GValue unroll = { 0, };
gst_value_init_and_copy (&unroll, dest);
g_value_unset (dest);
gst_value_list_concat (dest, &unroll, &subtraction);
} else if (GST_VALUE_HOLDS_LIST (dest)) {
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];
g_return_val_if_fail (GST_VALUE_HOLDS_LIST (subtrahend), FALSE);
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;
}
/*************************************/
/**
* 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)
{
GstValueTable *table;
int i;
if (G_VALUE_TYPE (value1) != G_VALUE_TYPE (value2))
return FALSE;
for (i = 0; i < gst_value_table->len; i++) {
table = &g_array_index (gst_value_table, GstValueTable, i);
if (table->type == G_VALUE_TYPE (value1) && table->compare)
return TRUE;
}
return FALSE;
}
/**
* 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 is returned.
* If @value1 is less than @value2, GST_VALUE_LESSER is returned.
* If the values are equal, GST_VALUE_EQUAL is returned.
*
* Returns: A GstValueCompareType value
*/
int
gst_value_compare (const GValue * value1, const GValue * value2)
{
GstValueTable *table;
int i;
if (G_VALUE_TYPE (value1) != G_VALUE_TYPE (value2))
return GST_VALUE_UNORDERED;
for (i = 0; i < gst_value_table->len; i++) {
table = &g_array_index (gst_value_table, GstValueTable, i);
if (table->type != G_VALUE_TYPE (value1) || table->compare == NULL)
continue;
return table->compare (value1, value2);
}
g_critical ("unable to compare values of type %s\n",
g_type_name (G_VALUE_TYPE (value1)));
return GST_VALUE_UNORDERED;
}
/* 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;
int 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: TRUE if the values could be unioned
*/
gboolean
gst_value_union (GValue * dest, const GValue * value1, const GValue * value2)
{
GstValueUnionInfo *union_info;
int 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.
*
*/
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:
* @value2:
*
* Returns:
*/
gboolean
gst_value_can_intersect (const GValue * value1, const GValue * value2)
{
GstValueIntersectInfo *intersect_info;
int i;
/* special cases */
if (GST_VALUE_HOLDS_LIST (value1) || GST_VALUE_HOLDS_LIST (value2))
return TRUE;
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 == G_VALUE_TYPE (value1) &&
intersect_info->type2 == G_VALUE_TYPE (value2))
if (intersect_info->type2 == G_VALUE_TYPE (value1) &&
intersect_info->type1 == G_VALUE_TYPE (value2))
return TRUE;
}
return gst_value_can_compare (value1, value2);
}
/**
* gst_value_intersect:
* @dest: the destination value for intersection
* @value1: a value to intersect
* @value2: another value to intersect
*
* Calculates the intersection of the two values.
*
* Returns: TRUE if the intersection is non-empty
*/
gboolean
gst_value_intersect (GValue * dest, const GValue * value1,
const GValue * value2)
{
GstValueIntersectInfo *intersect_info;
int i;
int ret = FALSE;
/* special cases first */
if (GST_VALUE_HOLDS_LIST (value1))
return gst_value_intersect_list (dest, value1, value2);
if (GST_VALUE_HOLDS_LIST (value2))
return gst_value_intersect_list (dest, value2, value1);
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 == G_VALUE_TYPE (value1) &&
intersect_info->type2 == G_VALUE_TYPE (value2)) {
ret = intersect_info->func (dest, value1, value2);
return ret;
}
if (intersect_info->type1 == G_VALUE_TYPE (value2) &&
intersect_info->type2 == G_VALUE_TYPE (value1)) {
ret = intersect_info->func (dest, value2, value1);
return ret;
}
}
if (gst_value_compare (value1, value2) == GST_VALUE_EQUAL) {
gst_value_init_and_copy (dest, value1);
ret = TRUE;
}
return ret;
}
/**
* gst_value_register_intersection_func:
* @type1:
* @type2:
* @func:
*
*/
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;
int i;
/* special cases first */
if (GST_VALUE_HOLDS_LIST (minuend))
return gst_value_subtract_from_list (dest, minuend, subtrahend);
if (GST_VALUE_HOLDS_LIST (subtrahend))
return gst_value_subtract_list (dest, minuend, subtrahend);
for (i = 0; i < gst_value_subtract_funcs->len; i++) {
info = &g_array_index (gst_value_subtract_funcs, GstValueSubtractInfo, i);
if (info->minuend == G_VALUE_TYPE (minuend) &&
info->subtrahend == G_VALUE_TYPE (subtrahend)) {
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;
int i;
/* special cases */
if (GST_VALUE_HOLDS_LIST (minuend) || GST_VALUE_HOLDS_LIST (subtrahend))
return TRUE;
for (i = 0; i < gst_value_subtract_funcs->len; i++) {
info = &g_array_index (gst_value_subtract_funcs, GstValueSubtractInfo, i);
if (info->minuend == G_VALUE_TYPE (minuend) &&
info->subtrahend == G_VALUE_TYPE (subtrahend))
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.
*/
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:
*
*/
void
gst_value_register (const GstValueTable * table)
{
g_array_append_val (gst_value_table, *table);
}
/*
* gst_value_init_and_copy:
* @dest:
* @src:
*
*/
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:
*
* Returns:
*/
gchar *
gst_value_serialize (const GValue * value)
{
int i;
GValue s_val = { 0 };
GstValueTable *table;
char *s;
for (i = 0; i < gst_value_table->len; i++) {
table = &g_array_index (gst_value_table, GstValueTable, i);
if (table->type != G_VALUE_TYPE (value) || table->serialize == NULL)
continue;
return table->serialize (value);
}
g_value_init (&s_val, G_TYPE_STRING);
g_value_transform (value, &s_val);
s = gst_string_wrap (g_value_get_string (&s_val));
g_value_unset (&s_val);
return s;
}
/*
* gst_value_deserialize:
* @dest:
* @src:
*
* Returns:
*/
gboolean
gst_value_deserialize (GValue * dest, const gchar * src)
{
GstValueTable *table;
int i;
for (i = 0; i < gst_value_table->len; i++) {
table = &g_array_index (gst_value_table, GstValueTable, i);
if (table->type != G_VALUE_TYPE (dest) || table->deserialize == NULL)
continue;
return table->deserialize (dest, src);
}
return FALSE;
}
/*
* gst_type_is_fixed:
* @type:
*
* Returns:
*/
gboolean
gst_type_is_fixed (GType type)
{
if (type == GST_TYPE_INT_RANGE || type == GST_TYPE_DOUBLE_RANGE ||
type == GST_TYPE_LIST) {
return FALSE;
}
if (G_TYPE_IS_FUNDAMENTAL (type) &&
type < G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_GLIB_LAST)) {
return TRUE;
}
if (type == GST_TYPE_BUFFER || type == GST_TYPE_FOURCC) {
return TRUE;
}
return FALSE;
}
void
_gst_value_initialize (void)
{
GTypeInfo info = {
0,
NULL,
NULL,
NULL,
NULL,
NULL,
0,
0,
NULL,
NULL,
};
GTypeFundamentalInfo finfo = {
0
};
//const GTypeFundamentalInfo finfo = { G_TYPE_FLAG_DERIVABLE, };
gst_value_table = g_array_new (FALSE, FALSE, sizeof (GstValueTable));
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 const GTypeValueTable value_table = {
gst_value_init_fourcc,
NULL,
gst_value_copy_fourcc,
NULL,
"i",
gst_value_collect_fourcc,
"p",
gst_value_lcopy_fourcc
};
static GstValueTable gst_value = {
0,
gst_value_compare_fourcc,
gst_value_serialize_fourcc,
gst_value_deserialize_fourcc,
};
info.value_table = &value_table;
gst_type_fourcc = g_type_register_fundamental (g_type_fundamental_next (),
"GstFourcc", &info, &finfo, 0);
gst_value.type = gst_type_fourcc;
gst_value_register (&gst_value);
}
{
static const GTypeValueTable 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
};
static GstValueTable gst_value = {
0,
gst_value_compare_int_range,
gst_value_serialize_int_range,
gst_value_deserialize_int_range,
};
info.value_table = &value_table;
gst_type_int_range =
g_type_register_fundamental (g_type_fundamental_next (), "GstIntRange",
&info, &finfo, 0);
gst_value.type = gst_type_int_range;
gst_value_register (&gst_value);
}
{
static const GTypeValueTable 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
};
static GstValueTable gst_value = {
0,
gst_value_compare_double_range,
gst_value_serialize_double_range,
gst_value_deserialize_double_range,
};
info.value_table = &value_table;
gst_type_double_range =
g_type_register_fundamental (g_type_fundamental_next (),
"GstDoubleRange", &info, &finfo, 0);
gst_value.type = gst_type_double_range;
gst_value_register (&gst_value);
}
{
static const GTypeValueTable value_table = {
gst_value_init_list,
gst_value_free_list,
gst_value_copy_list,
gst_value_list_peek_pointer,
"p",
gst_value_collect_list,
"p",
gst_value_lcopy_list
};
static GstValueTable gst_value = {
0,
gst_value_compare_list,
gst_value_serialize_list,
gst_value_deserialize_list,
};
info.value_table = &value_table;
gst_type_list = g_type_register_fundamental (g_type_fundamental_next (),
"GstValueList", &info, &finfo, 0);
gst_value.type = gst_type_list;
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,
};
#if 0
info.value_table = &value_table;
gst_type_fourcc =
g_type_register_static (G_TYPE_BOXED, "GstFourcc", &info, 0);
#endif
gst_value.type = GST_TYPE_BUFFER;
gst_value_register (&gst_value);
}
{
static const GstValueTable gst_value = {
G_TYPE_INT,
gst_value_compare_int,
gst_value_serialize_int,
gst_value_deserialize_int,
};
gst_value_register (&gst_value);
}
{
static const GstValueTable gst_value = {
G_TYPE_DOUBLE,
gst_value_compare_double,
gst_value_serialize_double,
gst_value_deserialize_double,
};
gst_value_register (&gst_value);
}
{
static const GstValueTable gst_value = {
G_TYPE_STRING,
gst_value_compare_string,
gst_value_serialize_string,
gst_value_deserialize_string,
};
gst_value_register (&gst_value);
}
{
static const GstValueTable gst_value = {
G_TYPE_BOOLEAN,
gst_value_compare_boolean,
gst_value_serialize_boolean,
gst_value_deserialize_boolean,
};
gst_value_register (&gst_value);
}
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_LIST, G_TYPE_STRING,
gst_value_transform_list_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_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_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);
}
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