gstvalue: Adds datetime functions

Adds a datetime functions to gstvalue

Fixes #594504

docs/gst/gstreamer-sections.txt

@@ -2588,6 +2588,7 @@ gst_search_mode_get_type
 <FILE>gstdatetime</FILE>
 <TITLE>GstDateTime</TITLE>
 GstDateTime
+GST_TYPE_DATE_TIME
 gst_date_time_get_day
 gst_date_time_get_month
 gst_date_time_get_hour
@@ -2667,6 +2668,9 @@ GST_TYPE_DATE
 gst_value_set_date
 gst_value_get_date
 
+<SUBSECTION datetime>
+GST_VALUE_HOLDS_DATE_TIME
+
 <SUBSECTION caps>
 GST_VALUE_HOLDS_CAPS
 gst_value_set_caps
@@ -2723,6 +2727,7 @@ gst_value_array_prepend_value
 
 <SUBSECTION Private>
 gst_date_get_type
+gst_date_time_get_type
 gst_double_range_get_type
 gst_fourcc_get_type
 gst_fraction_get_type

gst/gst_private.h

@@ -124,6 +124,9 @@ gboolean 		gst_registry_binary_write_cache	(GstRegistry * registry, const char *
     ((c) == '-') || ((c) == '+') || ((c) == '/') || ((c) == ':') || \
     ((c) == '.'))
 
+/* This is only meant for internal uses */
+gint priv_gst_date_time_compare (gconstpointer dt1, gconstpointer dt2);
+
 #ifndef GST_DISABLE_REGISTRY
 /* Secret variable to initialise gst without registry cache */
 extern gboolean _gst_disable_registry_cache;

gst/gstdatetime.c

@@ -557,3 +557,34 @@ gst_date_time_new_now_utc (void)
   gst_date_time_unref (now);
   return utc;
 }
+
+gint
+priv_gst_date_time_compare (gconstpointer dt1, gconstpointer dt2)
+{
+  GstDateTime *a, *b;
+  gint res = 0;
+
+  a = gst_date_time_to_utc (dt1);
+  b = gst_date_time_to_utc (dt2);
+
+#define GST_DATE_TIME_COMPARE_VALUE(a,b,v)   \
+  if ((a)->v > (b)->v) {                     \
+    res = 1;                                 \
+    goto done;                               \
+  } else if ((a)->v < (b)->v) {              \
+    res = -1;                                \
+    goto done;                               \
+  }
+
+  GST_DATE_TIME_COMPARE_VALUE (a, b, year);
+  GST_DATE_TIME_COMPARE_VALUE (a, b, month);
+  GST_DATE_TIME_COMPARE_VALUE (a, b, day);
+  GST_DATE_TIME_COMPARE_VALUE (a, b, usec);
+
+#undef GST_DATE_TIME_COMPARE_VALUE
+
+done:
+  gst_date_time_unref (a);
+  gst_date_time_unref (b);
+  return res;
+}

gst/gststructure.c

@@ -1548,6 +1548,8 @@ gst_structure_get_abbrs (gint * n_abbrs)
       {"s", G_TYPE_STRING}
       ,
       {"structure", GST_TYPE_STRUCTURE}
+      ,
+      {"datetime", GST_TYPE_DATE_TIME}
     };
     _num = G_N_ELEMENTS (dyn_abbrs);
     /* permanently allocate and copy the array now */

gst/gstvalue.c

@@ -4050,6 +4050,83 @@ gst_value_deserialize_date (GValue * dest, const gchar * s)
   return TRUE;
 }
 
+/*************
+ * GstDateTime *
+ *************/
+
+static gint
+gst_value_compare_date_time (const GValue * value1, const GValue * value2)
+{
+  const GstDateTime *date1 = (const GstDateTime *) g_value_get_boxed (value1);
+  const GstDateTime *date2 = (const GstDateTime *) g_value_get_boxed (value2);
+  gint ret;
+
+  if (date1 == date2)
+    return GST_VALUE_EQUAL;
+
+  if ((date1 == NULL) && (date2 != NULL)) {
+    return GST_VALUE_LESS_THAN;
+  }
+  if ((date2 == NULL) && (date1 != NULL)) {
+    return GST_VALUE_LESS_THAN;
+  }
+
+  ret = priv_gst_date_time_compare (date1, date2);
+
+  if (ret == 0)
+    return GST_VALUE_EQUAL;
+  else if (ret < 0)
+    return GST_VALUE_LESS_THAN;
+  else
+    return GST_VALUE_GREATER_THAN;
+}
+
+static gchar *
+gst_value_serialize_date_time (const GValue * val)
+{
+  const GstDateTime *date = (const GstDateTime *) g_value_get_boxed (val);
+  gint offset;
+
+  if (date == NULL)
+    return g_strdup ("null");
+
+  offset = gst_date_time_get_time_zone_offset (date);
+
+  return g_strdup_printf ("\"%04d-%02d-%02dT%02d:%02d:%02d.%06d"
+      "%c%02d%02d\"", gst_date_time_get_year (date),
+      gst_date_time_get_month (date), gst_date_time_get_day (date),
+      gst_date_time_get_hour (date), gst_date_time_get_minute (date),
+      gst_date_time_get_second (date), gst_date_time_get_microsecond (date),
+      offset >= 0 ? '+' : '-', (gint) ABS (offset) / 60,
+      (gint) ABS (offset) % 60);
+}
+
+static gboolean
+gst_value_deserialize_date_time (GValue * dest, const gchar * s)
+{
+  gint year, month, day, hour, minute, second, usecond;
+  gchar signal;
+  gint offset = 0;
+  gint ret;
+
+  if (!s || strcmp (s, "null") == 0) {
+    return FALSE;
+  }
+
+  ret = sscanf (s, "%04d-%02d-%02dT%02d:%02d:%02d.%06d%c%04d",
+      &year, &month, &day, &hour, &minute, &second, &usecond, &signal, &offset);
+  if (ret >= 9) {
+    offset = (offset / 100) * 60 + (offset % 100);
+    if (signal == '-')
+      offset = -offset;
+  } else
+    return FALSE;
+
+  g_value_take_boxed (dest, gst_date_time_new (year, month, day, hour,
+          minute, second, usecond, offset));
+  return TRUE;
+}
+
 static void
 gst_value_transform_date_string (const GValue * src_value, GValue * dest_value)
 {
@@ -4223,6 +4300,21 @@ gst_date_get_type (void)
   return gst_date_type;
 }
 
+GType
+gst_date_time_get_type (void)
+{
+  static GType gst_date_time_type = 0;
+
+  if (G_UNLIKELY (gst_date_time_type == 0)) {
+    gst_date_time_type = g_boxed_type_register_static ("GstDateTime",
+        (GBoxedCopyFunc) gst_date_time_ref,
+        (GBoxedFreeFunc) gst_date_time_unref);
+  }
+
+  return gst_date_time_type;
+}
+
+
 void
 _gst_value_initialize (void)
 {
@@ -4374,6 +4466,17 @@ _gst_value_initialize (void)
     gst_value.type = gst_date_get_type ();
     gst_value_register (&gst_value);
   }
+  {
+    static GstValueTable gst_value = {
+      0,
+      gst_value_compare_date_time,
+      gst_value_serialize_date_time,
+      gst_value_deserialize_date_time,
+    };
+
+    gst_value.type = gst_date_time_get_type ();
+    gst_value_register (&gst_value);
+  }
 
   REGISTER_SERIALIZATION (G_TYPE_DOUBLE, double);
   REGISTER_SERIALIZATION (G_TYPE_FLOAT, float);

gst/gstvalue.h

@@ -175,6 +175,16 @@ G_BEGIN_DECLS
  */
 #define GST_VALUE_HOLDS_DATE(x)         (G_VALUE_HOLDS((x), gst_date_get_type ()))
 
+/**
+ * GST_VALUE_HOLDS_DATE_TIME:
+ * @x: the #GValue to check
+ *
+ * Checks if the given #GValue contains a #GST_TYPE_DATE_TIME value.
+ *
+ * Since: 0.10.31
+ */
+#define GST_VALUE_HOLDS_DATE_TIME(x)    (G_VALUE_HOLDS((x), gst_date_time_get_type ()))
+
 /**
  * GST_TYPE_FOURCC:
  *
@@ -259,6 +269,17 @@ G_BEGIN_DECLS
 
 #define GST_TYPE_DATE                    gst_date_get_type ()
 
+/**
+ * GST_TYPE_DATE_TIME:
+ *
+ * a boxed #GValue type for #GstDateTime that represents a date and time.
+ *
+ * Returns: the #GType of GstDateTime
+ * Since: 0.10.31
+ */
+
+#define GST_TYPE_DATE_TIME               gst_date_time_get_type ()
+
 /**
  * GST_VALUE_LESS_THAN:
  *
@@ -403,6 +424,7 @@ GType gst_value_list_get_type (void);
 GType gst_value_array_get_type (void);
 
 GType gst_date_get_type (void);
+GType gst_date_time_get_type (void);
 
 void		gst_value_register		(const GstValueTable   *table);
 void		gst_value_init_and_copy		(GValue                *dest,

win32/common/libgstreamer.def

@@ -235,6 +235,7 @@ EXPORTS
 	gst_date_time_get_month
 	gst_date_time_get_second
 	gst_date_time_get_time_zone_offset
+	gst_date_time_get_type
 	gst_date_time_get_year
 	gst_date_time_new
 	gst_date_time_new_from_unix_epoch