/* GStreamer
* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
+ * Copyright (C) 2011 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* gstiterator.h: Header for GstIterator
*
G_BEGIN_DECLS
+#define GST_TYPE_ITERATOR (gst_iterator_get_type ())
+
/**
* GstIteratorResult:
* @GST_ITERATOR_DONE: No more items in the iterator
* @GST_ITERATOR_ITEM_PASS: Return item
* @GST_ITERATOR_ITEM_END: Stop after this item.
*
- * The result of a GstIteratorItemFunction.
+ * The result of a #GstIteratorItemFunction.
*/
typedef enum {
GST_ITERATOR_ITEM_SKIP = 0,
} GstIteratorItem;
/**
- * GstIteratorDisposeFunction:
- * @owner: the owner of the iterator
+ * GstIteratorCopyFunction:
+ * @it: The original iterator
+ * @copy: The copied iterator
*
- * The function that will be called when a GList iterator is freed. The
- * owner of the GList iterator can then clean up its resources.
+ * This function will be called when creating a copy of @it and should
+ * create a copy of all custom iterator fields or increase their
+ * reference counts.
*/
-typedef void (*GstIteratorDisposeFunction) (gpointer owner);
+typedef void (*GstIteratorCopyFunction) (const GstIterator *it, GstIterator *copy);
/**
- * GstIteratorNextFunction:
+ * GstIteratorItemFunction:
* @it: the iterator
- * @result: a pointer to hold the next item
+ * @item: the item being retrieved.
*
- * The function that will be called when the next element of the iterator
- * should be retrieved.
+ * The function that will be called after the next item of the iterator
+ * has been retrieved. This function can be used to skip items or stop
+ * the iterator.
*
- * Implementors of a #GstIterator should implement this
- * function and pass it to the constructor of the custom iterator.
* The function will be called with the iterator lock held.
*
* Returns: the result of the operation.
*/
-typedef GstIteratorResult (*GstIteratorNextFunction) (GstIterator *it, gpointer *result);
+typedef GstIteratorItem (*GstIteratorItemFunction) (GstIterator *it, const GValue * item);
+
/**
- * GstIteratorItemFunction:
+ * GstIteratorNextFunction:
* @it: the iterator
- * @item: the item being retrieved.
+ * @result: a pointer to hold the next item
*
- * The function that will be called after the next item of the iterator
- * has been retrieved. This function will typically increase the refcount
- * of the item or make a copy.
+ * The function that will be called when the next element of the iterator
+ * should be retrieved.
*
* Implementors of a #GstIterator should implement this
* function and pass it to the constructor of the custom iterator.
*
* Returns: the result of the operation.
*/
-typedef GstIteratorItem (*GstIteratorItemFunction) (GstIterator *it, gpointer item);
+typedef GstIteratorResult (*GstIteratorNextFunction) (GstIterator *it, GValue *result);
/**
* GstIteratorResyncFunction:
* @it: the iterator
typedef void (*GstIteratorFreeFunction) (GstIterator *it);
/**
+ * GstIteratorForeachFunction:
+ * @item: The item
+ * @user_data: User data
+ *
+ * A function that is called by gst_iterator_foreach() for every element.
+ */
+typedef void (*GstIteratorForeachFunction) (const GValue * item, gpointer user_data);
+
+/**
* GstIteratorFoldFunction:
* @item: the item to fold
- * @ret: a GValue collecting the result
+ * @ret: a #GValue collecting the result
* @user_data: data passed to gst_iterator_fold()
*
* A function to be passed to gst_iterator_fold().
*
* Returns: TRUE if the fold should continue, FALSE if it should stop.
*/
-typedef gboolean (*GstIteratorFoldFunction) (gpointer item, GValue *ret, gpointer user_data);
+typedef gboolean (*GstIteratorFoldFunction) (const GValue * item, GValue * ret, gpointer user_data);
/**
* GST_ITERATOR:
/**
* GstIterator:
+ * @copy: The function to copy the iterator
* @next: The function to get the next item in the iterator
* @item: The function to be called for each item retrieved
* @resync: The function to call when a resync is needed.
* @cookie: The cookie; the value of the master_cookie when this iterator was
* created.
* @master_cookie: A pointer to the master cookie.
+ * @size: the size of the iterator
*
- * GstIterator base structure. The values of this structure are
+ * #GstIterator base structure. The values of this structure are
* protected for subclasses, use the methods to use the #GstIterator.
*/
struct _GstIterator {
/*< protected >*/
+ GstIteratorCopyFunction copy;
GstIteratorNextFunction next;
GstIteratorItemFunction item;
GstIteratorResyncFunction resync;
guint32 cookie; /* cookie of the iterator */
guint32 *master_cookie; /* pointer to guint32 holding the cookie when this
iterator was created */
+ guint size;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
+GType gst_iterator_get_type (void);
+
/* creating iterators */
GstIterator* gst_iterator_new (guint size,
GType type,
GMutex *lock,
guint32 *master_cookie,
+ GstIteratorCopyFunction copy,
GstIteratorNextFunction next,
- GstIteratorItemFunction item,
+ GstIteratorItemFunction item,
GstIteratorResyncFunction resync,
GstIteratorFreeFunction free);
-GstIterator* gst_iterator_new_list (GType type,
+GstIterator* gst_iterator_new_list (GType type,
GMutex *lock,
guint32 *master_cookie,
GList **list,
- gpointer owner,
- GstIteratorItemFunction item,
- GstIteratorDisposeFunction free);
+ GObject * owner,
+ GstIteratorItemFunction item);
+
+GstIterator* gst_iterator_new_single (GType type,
+ const GValue * object);
+
+GstIterator* gst_iterator_copy (const GstIterator *it);
/* using iterators */
-GstIteratorResult gst_iterator_next (GstIterator *it, gpointer *elem);
+GstIteratorResult gst_iterator_next (GstIterator *it, GValue * elem);
void gst_iterator_resync (GstIterator *it);
void gst_iterator_free (GstIterator *it);
/* higher-order functions that operate on iterators */
GstIterator* gst_iterator_filter (GstIterator *it, GCompareFunc func,
- gpointer user_data);
+ const GValue * user_data);
GstIteratorResult gst_iterator_fold (GstIterator *it,
GstIteratorFoldFunction func,
GValue *ret, gpointer user_data);
GstIteratorResult gst_iterator_foreach (GstIterator *it,
- GFunc func, gpointer user_data);
-gpointer gst_iterator_find_custom (GstIterator *it, GCompareFunc func,
- gpointer user_data);
+ GstIteratorForeachFunction func, gpointer user_data);
+gboolean gst_iterator_find_custom (GstIterator *it, GCompareFunc func,
+ GValue *elem, gpointer user_data);
G_END_DECLS
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