controller: move to core/gstobject

Move the controller to gstobject as a simple delegate. The controller and
controlsource are not classes in core. The controlsources stay separate as a lib
for now. This way we can avoid the qdata lookups.

Also remove controller_init(). There is no more need to link to controller for
elements.

Also sanitize the API. We now have functions to add properties like we had
methods to remove that. That avoids then ref count hacks we had in _new.

1 files changed, 166 insertions, 0 deletions

diff --git a/gst/gstcontrolsource.h b/gst/gstcontrolsource.h
new file mode 100644
index 000000000..6fc64c634
--- /dev/null
+++ b/gst/gstcontrolsource.h
@@ -0,0 +1,166 @@
+/* GStreamer
+ *
+ * Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
+ *
+ * gstcontrolsource.h: Interface declaration for control sources
+ *
+ * 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.
+ */
+
+#ifndef __GST_CONTROL_SOURCE_H__
+#define __GST_CONTROL_SOURCE_H__
+
+#include <gst/gstconfig.h>
+
+#include <glib-object.h>
+
+#include <gst/gstclock.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_CONTROL_SOURCE \
+  (gst_control_source_get_type())
+#define GST_CONTROL_SOURCE(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CONTROL_SOURCE,GstControlSource))
+#define GST_CONTROL_SOURCE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CONTROL_SOURCE,GstControlSourceClass))
+#define GST_IS_CONTROL_SOURCE(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CONTROL_SOURCE))
+#define GST_IS_CONTROL_SOURCE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CONTROL_SOURCE))
+#define GST_CONTROL_SOURCE_GET_CLASS(obj) \
+  (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_CONTOL_SOURCE, GstControlSourceClass))
+
+typedef struct _GstControlSource GstControlSource;
+typedef struct _GstControlSourceClass GstControlSourceClass;
+typedef struct _GstTimedValue GstTimedValue;
+typedef struct _GstValueArray GstValueArray;
+
+/**
+ * GstTimedValue:
+ * @timestamp: timestamp of the value change
+ * @value: the corresponding value
+ *
+ * Structure for saving a timestamp and a value.
+ */
+struct _GstTimedValue
+{
+  GstClockTime timestamp;
+  GValue value;
+};
+
+/**
+ * GstValueArray:
+ * @property_name: the name of the property this array belongs to
+ * @nbsamples: number of samples requested
+ * @sample_interval: interval between each sample
+ * @values: pointer to the array
+ *
+ * Structure to receive multiple values at once.
+ */
+struct _GstValueArray
+{
+  const gchar *property_name;
+  gint nbsamples;
+  GstClockTime sample_interval;
+  gpointer *values;
+};
+
+/** 
+ * GstControlSourceGetValue
+ * @self: the #GstControlSource instance
+ * @timestamp: timestamp for which a value should be calculated
+ * @value: a #GValue which will be set to the result. It must be initialized to the correct type.
+ *
+ * Function for returning a value for a given timestamp.
+ *
+ * Returns: %TRUE if the value was successfully calculated.
+ *
+ */
+typedef gboolean (* GstControlSourceGetValue) (GstControlSource *self, GstClockTime timestamp, GValue *value);
+
+/** 
+ * GstControlSourceGetValueArray
+ * @self: the #GstControlSource instance
+ * @timestamp: timestamp for which a value should be calculated
+ * @value_array: array to put control-values in
+ *
+ * Function for returning a #GstValueArray for a given timestamp.
+ *
+ * Returns: %TRUE if the values were successfully calculated.
+ *
+ */
+typedef gboolean (* GstControlSourceGetValueArray) (GstControlSource *self, GstClockTime timestamp, GstValueArray *value_array);
+
+/** 
+ * GstControlSourceBind
+ * @self: the #GstControlSource instance
+ * @pspec: #GParamSpec that should be bound to
+ *
+ * Function for binding a #GstControlSource to a #GParamSpec.
+ *
+ * Returns: %TRUE if the property could be bound to the #GstControlSource, %FALSE otherwise.
+ */
+typedef gboolean (* GstControlSourceBind) (GstControlSource *self, GParamSpec *pspec);
+
+/**
+ * GstControlSource:
+ * @get_value: Function for returning a value for a given timestamp
+ * @get_value_array: Function for returning a #GstValueArray for a given timestamp
+ *
+ * The instance structure of #GstControlSource.
+ */
+struct _GstControlSource {
+  GObject parent;
+
+  /*< public >*/
+  GstControlSourceGetValue get_value;             /* Returns the value for a property at a given timestamp */
+  GstControlSourceGetValueArray get_value_array;  /* Returns values for a property in a given timespan */
+
+  /*< private >*/
+  gboolean bound;
+  gpointer _gst_reserved[GST_PADDING];
+};
+
+/**
+ * GstControlSourceClass:
+ * @parent_class: Parent class
+ * @bind: Class method for binding the #GstControlSource to a specific GParamSpec
+ *
+ * The class structure of #GstControlSource.
+ */
+
+struct _GstControlSourceClass
+{
+  GObjectClass parent_class;
+  
+  GstControlSourceBind bind;  /* Binds the GstControlSource to a specific GParamSpec */
+
+  /*< private >*/
+  gpointer _gst_reserved[GST_PADDING];
+};
+
+GType gst_control_source_get_type (void);
+
+/* Functions */
+
+gboolean gst_control_source_get_value (GstControlSource *self, GstClockTime timestamp, GValue *value);
+gboolean gst_control_source_get_value_array (GstControlSource *self, GstClockTime timestamp, GstValueArray *value_array);
+gboolean gst_control_source_bind (GstControlSource *self, GParamSpec *pspec);
+
+G_END_DECLS
+
+#endif /* __GST_CONTROL_SOURCE_H__ */