-#ifndef AV_SHA1_H
-#define AV_SHA1_H
+/*
+ * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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 FFMPEG_SHA1_H
+#define FFMPEG_SHA1_H
+
+#include <stdint.h>
extern const int av_sha1_size;
struct AVSHA1;
void av_sha1_init(struct AVSHA1* context);
-void av_sha1_update(struct AVSHA1* context, uint8_t* data, unsigned int len);
+void av_sha1_update(struct AVSHA1* context, const uint8_t* data, unsigned int len);
void av_sha1_final(struct AVSHA1* context, uint8_t digest[20]);
-#endif
+
+#endif /* FFMPEG_SHA1_H */