lib cleanup and sync for mips vu support

libeplayer3/external/ffmpeg/mathops.h

@@ -0,0 +1,56 @@
+/*
+ * simple math operations
+ * Copyright (c) 2001, 2002 Fabrice Bellard
+ * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
+ *
+ * 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 AVCODEC_MATHOPS_H
+#define AVCODEC_MATHOPS_H
+
+#include <stdint.h>
+#include <libavutil/common.h>
+
+#ifndef NEG_USR32
+#   define NEG_USR32(a,s) (((uint32_t)(a))>>(32-(s)))
+#endif
+
+#ifndef NEG_SSR32
+#   define NEG_SSR32(a,s) (((int32_t)(a))>>(32-(s)))
+#endif
+
+#ifndef sign_extend
+static inline av_const int sign_extend(int val, unsigned bits)
+{
+	unsigned shift = 8 * sizeof(int) - bits;
+	union
+	{
+		unsigned u;
+		int s;
+	} v = { (unsigned) val << shift };
+	return v.s >> shift;
+}
+#endif
+
+#ifndef zero_extend
+static inline av_const unsigned zero_extend(unsigned val, unsigned bits)
+{
+	return (val << ((8 * sizeof(int)) - bits)) >> ((8 * sizeof(int)) - bits);
+}
+#endif
+
+#endif /* AVCODEC_MATHOPS_H */