gstreamer/gst/gstvalue.c

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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 <string.h>
#include <gst/gst.h>
#include <gobject/gvaluecollector.h>
typedef struct _GstValueCompareInfo GstValueCompareInfo;
struct _GstValueCompareInfo {
GType type;
GstValueCompareFunc func;
};
typedef struct _GstValueUnionInfo GstValueUnionInfo;
struct _GstValueUnionInfo {
GType type1;
GType type2;
GstValueUnionFunc func;
};
typedef struct _GstValueIntersectInfo GstValueIntersectInfo;
struct _GstValueIntersectInfo {
GType type1;
GType type2;
GstValueIntersectFunc func;
};
GType gst_type_fourcc;
GType gst_type_int_range;
GType gst_type_double_range;
GType gst_value_type_list;
GArray *gst_value_compare_funcs;
GArray *gst_value_union_funcs;
GArray *gst_value_intersect_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++) {
g_value_init (&g_array_index(dest, GValue, i), G_VALUE_TYPE (&g_array_index(src, GValue, i)));
g_value_copy (&g_array_index(src, GValue, i), &g_array_index(dest, 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;
}
void
gst_value_list_prepend_value (GValue *value, const GValue *prepend_value)
{
g_return_if_fail (GST_VALUE_HOLDS_LIST (value));
g_array_prepend_vals ((GArray *) value->data[0].v_pointer, prepend_value, 1);
}
void
gst_value_list_append_value (GValue *value, const GValue *append_value)
{
g_return_if_fail (GST_VALUE_HOLDS_LIST (value));
g_array_append_vals ((GArray *) value->data[0].v_pointer, append_value, 1);
}
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;
}
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. dest will be
* initialized to the type GST_VALUE_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_VALUE_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++) {
g_value_init (&g_array_index(array, GValue, i), G_VALUE_TYPE (gst_value_list_get_value (value1, i)));
g_value_copy (gst_value_list_get_value (value1, i), &g_array_index(array, GValue, i));
}
} else {
g_value_init (&g_array_index(array, GValue, 0), G_VALUE_TYPE (value1));
g_value_copy (value1, &g_array_index(array, GValue, 0));
}
if (GST_VALUE_HOLDS_LIST (value2)) {
for (i = 0; i < value2_length; i++) {
g_value_init (&g_array_index(array, GValue, i + value1_length), G_VALUE_TYPE (gst_value_list_get_value (value2, i)));
g_value_copy (gst_value_list_get_value (value2, i), &g_array_index(array, GValue, i + value1_length));
}
} else {
g_value_init (&g_array_index(array, GValue, value1_length), G_VALUE_TYPE (value2));
g_value_copy (value2, &g_array_index(array, GValue, value1_length));
}
}
/* fourcc */
static void
gst_value_init_fourcc (GValue *value)
{
value->data[0].v_long = 0;
}
static void
gst_value_copy_fourcc (const GValue *src_value, GValue *dest_value)
{
dest_value->data[0].v_long = src_value->data[0].v_long;
}
static gchar *
gst_value_collect_fourcc (GValue *value, guint n_collect_values,
GTypeCValue *collect_values, guint collect_flags)
{
value->data[0].v_long = collect_values[0].v_long;
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_long;
return NULL;
}
void
gst_value_set_fourcc (GValue *value, guint32 fourcc)
{
g_return_if_fail (GST_VALUE_HOLDS_FOURCC (value));
value->data[0].v_long = fourcc;
}
guint32
gst_value_get_fourcc (const GValue *value)
{
g_return_val_if_fail (GST_VALUE_HOLDS_FOURCC (value), 0);
return value->data[0].v_long;
}
/* int range */
static void
gst_value_init_int_range (GValue *value)
{
value->data[0].v_long = 0;
}
static void
gst_value_copy_int_range (const GValue *src_value, GValue *dest_value)
{
dest_value->data[0].v_long = src_value->data[0].v_long;
}
static gchar *
gst_value_collect_int_range (GValue *value, guint n_collect_values,
GTypeCValue *collect_values, guint collect_flags)
{
value->data[0].v_long = collect_values[0].v_long;
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_p = collect_values[0].v_pointer;
if (!int_range_p)
return g_strdup_printf ("value location for `%s' passed as NULL",
G_VALUE_TYPE_NAME (value));
*int_range_p = value->data[0].v_long;
return NULL;
}
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_long = start;
value->data[1].v_long = end;
}
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_long;
}
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_long;
}
/* 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)
{
/* FIXME */
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)
{
guint32 *double_range_p = collect_values[0].v_pointer;
/* FIXME */
if (!double_range_p)
return g_strdup_printf ("value location for `%s' passed as NULL",
G_VALUE_TYPE_NAME (value));
*double_range_p = value->data[0].v_double;
return NULL;
}
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;
}
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;
}
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;
}
/* fourcc */
static void
gst_value_transform_fourcc_string (const GValue *src_value,
GValue *dest_value)
{
dest_value->data[0].v_pointer = g_strdup_printf(GST_FOURCC_FORMAT,
GST_FOURCC_ARGS(src_value->data[0].v_long));
}
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_long, (int)src_value->data[1].v_long);
}
/* comparison functions */
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 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 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;
}
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;
}
gboolean
gst_value_can_compare (const GValue *value1, const GValue *value2)
{
GstValueCompareInfo *compare_info;
int i;
if(G_VALUE_TYPE(value1) != G_VALUE_TYPE(value2))return FALSE;
for(i=0;i<gst_value_compare_funcs->len;i++){
compare_info = &g_array_index(gst_value_compare_funcs,
GstValueCompareInfo, i);
if(compare_info->type == G_VALUE_TYPE(value1)) return TRUE;
}
return FALSE;
}
int
gst_value_compare (const GValue *value1, const GValue *value2)
{
GstValueCompareInfo *compare_info;
int i;
g_return_val_if_fail(G_VALUE_TYPE(value1) == G_VALUE_TYPE(value2), 0);
for(i=0;i<gst_value_compare_funcs->len;i++){
compare_info = &g_array_index(gst_value_compare_funcs,
GstValueCompareInfo, i);
if(compare_info->type != G_VALUE_TYPE(value1)) continue;
return compare_info->func(value1, value2);
}
g_return_val_if_fail(0 /* type not found */, GST_VALUE_UNORDERED);
return GST_VALUE_UNORDERED;
}
void
gst_value_register_compare_func (GType type, GstValueCompareFunc func)
{
GstValueCompareInfo compare_info;
compare_info.type = type;
compare_info.func = func;
g_array_append_val(gst_value_compare_funcs, compare_info);
}
/* union */
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;
}
return FALSE;
}
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)) {
return union_info->func(dest, value1, value2);
}
}
gst_value_list_concat (dest, value1, value2);
return TRUE;
}
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 */
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_long <= src1->data[0].v_int &&
src2->data[1].v_long >= src1->data[0].v_int){
g_value_copy(src1, dest);
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_long, src2->data[0].v_long);
max = MIN(src1->data[1].v_long, src2->data[1].v_long);
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;
}
gboolean
gst_value_can_intersect (const GValue *value1, const GValue *value2)
{
GstValueIntersectInfo *intersect_info;
int i;
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)) return TRUE;
}
return FALSE;
}
gboolean
gst_value_intersect (GValue *dest, const GValue *value1, const GValue *value2)
{
GstValueIntersectInfo *intersect_info;
int i;
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)) {
return intersect_info->func(dest, value1, value2);
}
}
if(gst_value_compare(value1, value2) == GST_VALUE_EQUAL){
g_value_init(dest, G_VALUE_TYPE(value1));
g_value_copy(value1, dest);
return TRUE;
}
return FALSE;
}
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);
}
void
_gst_value_initialize (void)
{
GTypeInfo info = {
0,
NULL,
NULL,
NULL,
NULL,
NULL,
0,
0,
NULL,
NULL,
};
//const GTypeFundamentalInfo finfo = { G_TYPE_FLAG_DERIVABLE, };
{
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
};
info.value_table = &value_table;
gst_type_fourcc = g_type_register_static (G_TYPE_BOXED, "GstFourcc", &info, 0);
}
{
static const GTypeValueTable value_table = {
gst_value_init_int_range,
NULL,
gst_value_copy_int_range,
NULL,
"i",
gst_value_collect_int_range,
"p",
gst_value_lcopy_int_range
};
info.value_table = &value_table;
gst_type_int_range = g_type_register_static (G_TYPE_BOXED, "GstIntRange", &info, 0);
}
{
static const GTypeValueTable value_table = {
gst_value_init_double_range,
NULL,
gst_value_copy_double_range,
NULL,
"i",
gst_value_collect_double_range,
"p",
gst_value_lcopy_double_range
};
info.value_table = &value_table;
gst_type_double_range = g_type_register_static (G_TYPE_BOXED, "GstDoubleRange", &info, 0);
}
{
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
};
info.value_table = &value_table;
gst_value_type_list = g_type_register_static (G_TYPE_BOXED, "GstValueList", &info, 0);
}
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);
gst_value_compare_funcs = g_array_new(FALSE, FALSE,
sizeof(GstValueCompareInfo));
gst_value_register_compare_func (G_TYPE_INT, gst_value_compare_int);
gst_value_register_compare_func (G_TYPE_DOUBLE, gst_value_compare_double);
gst_value_register_compare_func (G_TYPE_STRING, gst_value_compare_string);
gst_value_register_compare_func (GST_TYPE_FOURCC, gst_value_compare_fourcc);
gst_value_union_funcs = g_array_new(FALSE, FALSE,
sizeof(GstValueUnionInfo));
gst_value_intersect_funcs = g_array_new(FALSE, FALSE,
sizeof(GstValueIntersectInfo));
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);
}