moves fraps huffman decoder to its own file, making it more generic

Originally committed as revision 10736 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 38 insertions, 0 deletions

diff --git a/libavcodec/huffman.h b/libavcodec/huffman.h
new file mode 100644
index 0000000000..0474fbafb4
--- /dev/null
+++ b/libavcodec/huffman.h
@@ -0,0 +1,38 @@
+/**
+ * @file huffman.h
+ * huffman tree builder and VLC generator
+ * Copyright (C) 2007  Aurelien Jacobs <aurel@gnuage.org>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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,
+ * 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_HUFFMAN_H
+#define AVCODEC_HUFFMAN_H
+
+#include "avcodec.h"
+
+typedef struct {
+    int16_t  sym;
+    int16_t  n0;
+    uint32_t count;
+} Node;
+
+typedef int (*huff_cmp_t)(const void *va, const void *vb);
+int ff_huff_build_tree(AVCodecContext *avctx, VLC *vlc, int nb_codes,
+                       Node nodes[2*nb_codes], huff_cmp_t cmp, int hnode_first);
+
+#endif /* AVCODEC_HUFFMAN_H */