1 files changed, 47 insertions, 0 deletions
diff --git a/ffmpeg1/libavcodec/huffman.h b/ffmpeg1/libavcodec/huffman.h
new file mode 100644
index 0000000..4f9ccba
--- /dev/null
+++ b/ffmpeg1/libavcodec/huffman.h
@@ -0,0 +1,47 @@
+/*
+ * 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
+ */
+
+/**
+ * @file
+ * huffman tree builder and VLC generator
+ */
+
+#ifndef AVCODEC_HUFFMAN_H
+#define AVCODEC_HUFFMAN_H
+
+#include "avcodec.h"
+#include "get_bits.h"
+
+typedef struct Node {
+    int16_t  sym;
+    int16_t  n0;
+    uint32_t count;
+} Node;
+
+#define FF_HUFFMAN_FLAG_HNODE_FIRST 0x01
+#define FF_HUFFMAN_FLAG_ZERO_COUNT  0x02
+
+typedef int (*HuffCmp)(const void *va, const void *vb);
+int ff_huff_build_tree(AVCodecContext *avctx, VLC *vlc, int nb_codes,
+                       Node *nodes, HuffCmp cmp, int flags);
+
+void ff_huff_gen_len_table(uint8_t *dst, const uint64_t *stats);
+
+#endif /* AVCODEC_HUFFMAN_H */