* Copyright (c) 2001, 2002 Fabrice Bellard
* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
*
- * 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 AVCODEC_MATHOPS_H
#ifndef sign_extend
static inline av_const int sign_extend(int val, unsigned bits)
{
- return (val << (INT_BIT - bits)) >> (INT_BIT - bits);
+ return (val << ((8 * sizeof(int)) - bits)) >> ((8 * sizeof(int)) - bits);
}
#endif
#ifndef zero_extend
static inline av_const unsigned zero_extend(unsigned val, unsigned bits)
{
- return (val << (INT_BIT - bits)) >> (INT_BIT - bits);
+ return (val << ((8 * sizeof(int)) - bits)) >> ((8 * sizeof(int)) - bits);
}
#endif
# define NEG_USR32(a,s) (((uint32_t)(a))>>(32-(s)))
#endif
+#if HAVE_BIGENDIAN
+# ifndef PACK_2U8
+# define PACK_2U8(a,b) (((a) << 8) | (b))
+# endif
+# ifndef PACK_4U8
+# define PACK_4U8(a,b,c,d) (((a) << 24) | ((b) << 16) | ((c) << 8) | (d))
+# endif
+# ifndef PACK_2U16
+# define PACK_2U16(a,b) (((a) << 16) | (b))
+# endif
+#else
+# ifndef PACK_2U8
+# define PACK_2U8(a,b) (((b) << 8) | (a))
+# endif
+# ifndef PACK_4U2
+# define PACK_4U8(a,b,c,d) (((d) << 24) | ((c) << 16) | ((b) << 8) | (a))
+# endif
+# ifndef PACK_2U16
+# define PACK_2U16(a,b) (((b) << 16) | (a))
+# endif
+#endif
+
+#ifndef PACK_2S8
+# define PACK_2S8(a,b) PACK_2U8((a)&255, (b)&255)
+#endif
+#ifndef PACK_4S8
+# define PACK_4S8(a,b,c,d) PACK_4U8((a)&255, (b)&255, (c)&255, (d)&255)
+#endif
+#ifndef PACK_2S16
+# define PACK_2S16(a,b) PACK_2U16((a)&0xffff, (b)&0xffff)
+#endif
+
#endif /* AVCODEC_MATHOPS_H */