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Add GST_TYPE_DATE, a boxed type that wraps GDate, and the usual bunch of utility functions along with a hack that che...

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Original commit message from CVS:
* docs/gst/gstreamer-sections.txt:
* gst/gststructure.c: (gst_structure_set_valist),
(gst_structure_get_date):
* gst/gststructure.h:
* gst/gstvalue.c: (gst_value_set_date), (gst_value_get_date),
(gst_date_copy), (gst_value_compare_date),
(gst_value_serialize_date), (gst_value_deserialize_date),
(gst_value_transform_date_string),
(gst_value_transform_string_date), (_gst_value_initialize):
* gst/gstvalue.h:
Add GST_TYPE_DATE, a boxed type that wraps GDate, and the usual
bunch of utility functions along with a hack that checks that
developers don't accidentally use G_TYPE_DATE where GST_TYPE_DATE
is required. Part of the grand scheme in #170777.
This commit is contained in:
Tim-Philipp Müller 2005-09-22 15:08:02 +00:00
parent 59479d47a3
commit 7390d68eee
6 changed files with 235 additions and 0 deletions
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17
ChangeLog
View file

@ -1,3 +1,20 @@
2005-09-22 Tim-Philipp Müller <tim at centricular dot net>
* docs/gst/gstreamer-sections.txt:
* gst/gststructure.c: (gst_structure_set_valist),
(gst_structure_get_date):
* gst/gststructure.h:
* gst/gstvalue.c: (gst_value_set_date), (gst_value_get_date),
(gst_date_copy), (gst_value_compare_date),
(gst_value_serialize_date), (gst_value_deserialize_date),
(gst_value_transform_date_string),
(gst_value_transform_string_date), (_gst_value_initialize):
* gst/gstvalue.h:
Add GST_TYPE_DATE, a boxed type that wraps GDate, and the usual
bunch of utility functions along with a hack that checks that
developers don't accidentally use G_TYPE_DATE where GST_TYPE_DATE
is required. Part of the grand scheme in #170777.
2005-09-22 Andy Wingo <wingo@pobox.com>
* gst/gstconfig.h.in: Psych out gtk-doc.

7
docs/gst/gstreamer-sections.txt
View file

@ -1623,6 +1623,7 @@ gst_structure_get_int
gst_structure_get_fourcc
gst_structure_get_double
gst_structure_get_string
gst_structure_get_date
gst_structure_map_in_place
gst_structure_nth_field_name
gst_structure_set_parent_refcount
@ -2036,6 +2037,12 @@ gst_value_get_fraction_numerator
gst_value_get_fraction_denominator
gst_value_fraction_multiply
<SUBSECTION date>
GST_VALUE_HOLDS_DATE
GST_TYPE_DATE
gst_value_set_date
gst_value_get_date
<SUBSECTION caps>
GST_VALUE_HOLDS_CAPS
gst_value_set_caps

42
gst/gststructure.c
View file

@ -438,6 +438,14 @@ gst_structure_set_valist (GstStructure * structure,
field.name = g_quark_from_string (fieldname);
type = va_arg (varargs, GType);
#if GLIB_CHECK_VERSION(2,8,0)
if (type == G_TYPE_DATE) {
g_warning ("Don't use G_TYPE_DATE, use GST_TYPE_DATE instead\n");
type = GST_TYPE_DATE;
}
#endif
g_value_init (&field.value, type);
G_VALUE_COLLECT (&field.value, varargs, 0, &err);
if (err) {
@ -944,6 +952,40 @@ gst_structure_get_fourcc (const GstStructure * structure,
return TRUE;
}
/**
* gst_structure_get_date:
* @structure: a #GstStructure
* @fieldname: the name of a field
* @value: a pointer to a #GDate to set
*
* Sets the date pointed to by @date_out corresponding to the date of the
* given field. Caller is responsible for making sure the field exists
* and has the correct type.
*
* Returns: TRUE if the value could be set correctly
*/
gboolean
gst_structure_get_date (const GstStructure * structure, const gchar * fieldname,
GDate ** date_out)
{
GstStructureField *field;
g_return_val_if_fail (structure != NULL, FALSE);
g_return_val_if_fail (fieldname != NULL, FALSE);
g_return_val_if_fail (date_out != NULL, FALSE);
field = gst_structure_get_field (structure, fieldname);
if (field == NULL)
return FALSE;
if (!GST_VALUE_HOLDS_DATE (&field->value))
return FALSE;
*date_out = g_value_dup_boxed (&field->value);
return TRUE;
}
/**
* gst_structure_get_double:
* @structure: a #GstStructure

3
gst/gststructure.h
View file

@ -130,6 +130,9 @@ gboolean gst_structure_get_fourcc (const GstStructure
gboolean gst_structure_get_double (const GstStructure *structure,
const gchar *fieldname,
gdouble *value);
gboolean gst_structure_get_date (const GstStructure *structure,
const gchar *fieldname,
GDate **date_out);
G_CONST_RETURN gchar * gst_structure_get_string (const GstStructure *structure,
const gchar *fieldname);

142
gst/gstvalue.c
View file

@ -64,6 +64,7 @@ GType gst_type_double_range;
GType gst_type_list;
GType gst_type_array;
GType gst_type_fraction;
GType gst_type_date;
static GArray *gst_value_table;
static GArray *gst_value_union_funcs;
@ -2970,6 +2971,125 @@ gst_value_compare_fraction (const GValue * value1, const GValue * value2)
return GST_VALUE_UNORDERED;
}
/*********
* GDate *
*********/
/**
* gst_value_set_date:
* @value: a GValue initialized to GST_TYPE_DATE
* @caps: 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_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;
return g_date_new_julian (g_date_get_julian (date));
}
static int
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 char *
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);
}
void
_gst_value_initialize (void)
{
@ -3186,7 +3306,25 @@ _gst_value_initialize (void)
gst_value.type = GST_TYPE_CAPS;
gst_value_register (&gst_value);
}
{
static GstValueTable gst_value = {
0,
gst_value_compare_date,
gst_value_serialize_date,
gst_value_deserialize_date,
};
/* 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 in 0.11 when we
* require GLib-2.8 */
gst_type_date = g_boxed_type_register_static ("GstDate",
(GBoxedCopyFunc) gst_date_copy, (GBoxedFreeFunc) g_date_free);
gst_value.type = gst_type_date;
gst_value_register (&gst_value);
}
REGISTER_SERIALIZATION (G_TYPE_DOUBLE, double);
REGISTER_SERIALIZATION (G_TYPE_FLOAT, float);
@ -3224,6 +3362,10 @@ _gst_value_initialize (void)
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);
gst_value_register_intersect_func (G_TYPE_INT, GST_TYPE_INT_RANGE,
gst_value_intersect_int_int_range);

24
gst/gstvalue.h
View file

@ -148,6 +148,14 @@ G_BEGIN_DECLS
*/
#define GST_VALUE_HOLDS_FRACTION(x) (G_VALUE_HOLDS(x, gst_type_fraction))
/**
* GST_VALUE_HOLDS_DATE:
* @x: the #GValue to check
*
* Checks if the given #GValue contains a #GST_TYPE_DATE value.
*/
#define GST_VALUE_HOLDS_DATE(x) (G_VALUE_HOLDS(x, gst_type_date))
/**
* GST_TYPE_FOURCC:
*
@ -204,6 +212,15 @@ G_BEGIN_DECLS
#define GST_TYPE_FRACTION gst_type_fraction
/**
* GST_TYPE_DATE:
*
* a boxed #GValue type for #GDate that represents a date.
*
* Returns: the #GType of GstDate
*/
#define GST_TYPE_DATE gst_type_date
/**
* GST_VALUE_LESS_THAN:
@ -284,6 +301,7 @@ GST_EXPORT GType gst_type_double_range;
GST_EXPORT GType gst_type_list;
GST_EXPORT GType gst_type_array;
GST_EXPORT GType gst_type_fraction;
GST_EXPORT GType gst_type_date;
void gst_value_register (const GstValueTable *table);
void gst_value_init_and_copy (GValue *dest,
@ -341,6 +359,12 @@ gboolean gst_value_fraction_multiply (GValue *product,
const GValue *factor1,
const GValue *factor2);
/* date */
G_CONST_RETURN GDate *
gst_value_get_date (const GValue *value);
void gst_value_set_date (GValue *value,
const GDate *date);
/* compare */
int gst_value_compare (const GValue *value1,
const GValue *value2);