Remove libpostproc.

[ffmpeg] / libavutil / tree.h

diff --git a/libavutil/tree.h b/libavutil/tree.h
index b26dd9b0000a7a0035875ee4b53c330f03c318ce..59ea01dbdb049b3b627806a0ada1cb29989a5af4 100644 (file)
--- a/libavutil/tree.h
+++ b/libavutil/tree.h
@@ -1,39 +1,49 @@
 /*
  * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 /**
- * @file libavutil/tree.h
+ * @file
  * A tree container.
- * Insertion, removal, finding equal, largest which is smaller than and
- * smallest which is larger than, all have O(log n) worst case complexity.
  * @author Michael Niedermayer <michaelni@gmx.at>
  */
 
 #ifndef AVUTIL_TREE_H
 #define AVUTIL_TREE_H
 
+/**
+ * @addtogroup lavu_tree AVTree
+ * @ingroup lavu_data
+ *
+ * Low complexity tree container
+ *
+ * Insertion, removal, finding equal, largest which is smaller than and
+ * smallest which is larger than, all have O(log n) worst case complexity.
+ * @{
+ */
+
+
 struct AVTreeNode;
 extern const int av_tree_node_size;
 
 /**
- * Finds an element.
+ * Find an element.
  * @param root a pointer to the root node of the tree
  * @param next If next is not NULL, then next[0] will contain the previous
  *             element and next[1] the next element. If either does not exist,
@@ -44,7 +54,7 @@ extern const int av_tree_node_size;
 void *av_tree_find(const struct AVTreeNode *root, void *key, int (*cmp)(void *key, const void *b), void *next[2]);
 
 /**
- * Inserts or removes an element.
+ * Insert or remove an element.
  * If *next is NULL, then the supplied element will be removed if it exists.
  * If *next is not NULL, then the supplied element will be inserted, unless
  * it already exists in the tree.
@@ -61,15 +71,16 @@ void *av_tree_find(const struct AVTreeNode *root, void *key, int (*cmp)(void *ke
  *             This allows the use of flat arrays, which have
  *             lower overhead compared to many malloced elements.
  *             You might want to define a function like:
+ *             @code
  *             void *tree_insert(struct AVTreeNode **rootp, void *key, int (*cmp)(void *key, const void *b), AVTreeNode **next){
  *                 if(!*next) *next= av_mallocz(av_tree_node_size);
  *                 return av_tree_insert(rootp, key, cmp, next);
  *             }
  *             void *tree_remove(struct AVTreeNode **rootp, void *key, int (*cmp)(void *key, const void *b, AVTreeNode **next)){
- *                 if(*next) av_freep(next);
+ *                 av_freep(next);
  *                 return av_tree_insert(rootp, key, cmp, next);
  *             }
- *
+ *             @endcode
  * @return If no insertion happened, the found element; if an insertion or
  *         removal happened, then either key or NULL will be returned.
  *         Which one it is depends on the tree state and the implementation. You
@@ -78,4 +89,20 @@ void *av_tree_find(const struct AVTreeNode *root, void *key, int (*cmp)(void *ke
 void *av_tree_insert(struct AVTreeNode **rootp, void *key, int (*cmp)(void *key, const void *b), struct AVTreeNode **next);
 void av_tree_destroy(struct AVTreeNode *t);
 
+/**
+ * Apply enu(opaque, &elem) to all the elements in the tree in a given range.
+ *
+ * @param cmp a comparison function that returns < 0 for a element below the
+ *            range, > 0 for a element above the range and == 0 for a
+ *            element inside the range
+ *
+ * @note The cmp function should use the same ordering used to construct the
+ *       tree.
+ */
+void av_tree_enumerate(struct AVTreeNode *t, void *opaque, int (*cmp)(void *opaque, void *elem), int (*enu)(void *opaque, void *elem));
+
+/**
+ * @}
+ */
+
 #endif /* AVUTIL_TREE_H */