vc1dec: Make sure last_picture is initialized in vc1_decode_skip_blocks

[ffmpeg] / libavutil / adler32.h

diff --git a/libavutil/adler32.h b/libavutil/adler32.h
index 4b035dcdf33980a752e1ea35270815a0fb620d11..a8ff6f9d41c24814952b62b4b85c188c9fdb5278 100644 (file)
--- a/libavutil/adler32.h
+++ b/libavutil/adler32.h
@@ -1,7 +1,43 @@
-#ifndef ADLER32_H
-#define ADLER32_H
+/*
+ * copyright (c) 2006 Mans Rullgard
+ *
+ * This file is part of Libav.
+ *
+ * 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.
+ *
+ * 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
 
+#ifndef AVUTIL_ADLER32_H
+#define AVUTIL_ADLER32_H
+
+#include <stdint.h>
+#include "attributes.h"
+
+/**
+ * @ingroup lavu_crypto
+ * Calculate the Adler32 checksum of a buffer.
+ *
+ * Passing the return value to a subsequent av_adler32_update() call
+ * allows the checksum of multiple buffers to be calculated as though
+ * they were concatenated.
+ *
+ * @param adler initial checksum value
+ * @param buf   pointer to input buffer
+ * @param len   size of input buffer
+ * @return      updated checksum
+ */
 unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf,
-                                unsigned int len);
+                                unsigned int len) av_pure;
 
-#endif
+#endif /* AVUTIL_ADLER32_H */