/*
* 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
*/
-#ifndef CRC_H
-#define CRC_H
+#ifndef AVUTIL_CRC_H
+#define AVUTIL_CRC_H
#include <stdint.h>
-#include <sys/types.h>
+#include <stddef.h>
+#include "attributes.h"
typedef uint32_t AVCRC;
-#define AV_CRC_8_ATM 0x07
-#define AV_CRC_16 0x8005
-#define AV_CRC_16_CCITT 0x1021
-#define AV_CRC_32_IEEE 0x04C11DB7L
-//! reversed bitorder version of AV_CRC_32_IEEE
-#define AV_CRC_32_IEEE_LE 0xEDB88320L
-
-#if LIBAVUTIL_VERSION_INT < (50<<16)
-extern AVCRC *av_crcEDB88320;
-extern AVCRC *av_crc04C11DB7;
-extern AVCRC *av_crc8005 ;
-extern AVCRC *av_crc07 ;
-#else
-extern AVCRC av_crcEDB88320[];
-extern AVCRC av_crc04C11DB7[];
-extern AVCRC av_crc8005 [];
-extern AVCRC av_crc07 [];
-#endif
+typedef enum {
+ AV_CRC_8_ATM,
+ AV_CRC_16_ANSI,
+ AV_CRC_16_CCITT,
+ AV_CRC_32_IEEE,
+ AV_CRC_32_IEEE_LE, /*< reversed bitorder version of AV_CRC_32_IEEE */
+ AV_CRC_MAX, /*< Not part of public API! Do not use outside libavutil. */
+}AVCRCId;
int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size);
-uint32_t av_crc(const AVCRC *ctx, uint32_t start_crc, const uint8_t *buffer, size_t length);
-
-#endif /* CRC_H */
+const AVCRC *av_crc_get_table(AVCRCId crc_id);
+uint32_t av_crc(const AVCRC *ctx, uint32_t start_crc, const uint8_t *buffer, size_t length) av_pure;
+#endif /* AVUTIL_CRC_H */