avutil/reverse: move the ff_reverse declaration to a separate header

Fixes compilation with hardcoded tables after eaff1aa0
and e71b8119

Reviewed-by: Timo Rothenpieler <timo@rothenpieler.org>
Signed-off-by: James Almer <jamrial@gmail.com>

libavcodec/mathops.h

@@ -25,7 +25,7 @@
 #include <stdint.h>
 
 #include "libavutil/common.h"
-#include "libavutil/internal.h"
+#include "libavutil/reverse.h"
 #include "config.h"
 
 #define MAX_NEG_CROP 1024

libavutil/eval.c

@@ -38,6 +38,7 @@
 #include "time.h"
 #include "avstring.h"
 #include "timer.h"
+#include "reverse.h"
 
 typedef struct Parser {
     const AVClass *class;

libavutil/internal.h

@@ -340,6 +340,4 @@ void ff_check_pixfmt_descriptors(void);
  */
 int avpriv_dict_set_timestamp(AVDictionary **dict, const char *key, int64_t timestamp);
 
-extern const uint8_t ff_reverse[256];
-
 #endif /* AVUTIL_INTERNAL_H */

libavutil/reverse.h

+/*
+ * Copyright (c) 2002-2004 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 AVUTIL_REVERSE_H
+#define AVUTIL_REVERSE_H
+
+#include <stdint.h>
+
+extern const uint8_t ff_reverse[256];
+
+#endif /* AVUTIL_REVERSE_H */