1 files changed, 82 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavutil/integer.h b/contrib/ffmpeg/libavutil/integer.h
new file mode 100644
index 000000000..2a4d70316
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+++ b/contrib/ffmpeg/libavutil/integer.h
@@ -0,0 +1,82 @@
+/*
+ * arbitrary precision integers
+ * Copyright (c) 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
+ *
+ */
+
+/**
+ * @file integer.h
+ * arbitrary precision integers
+ * @author Michael Niedermayer <michaelni@gmx.at>
+ */
+
+#ifndef INTEGER_H
+#define INTEGER_H
+
+#define AV_INTEGER_SIZE 8
+
+typedef struct AVInteger{
+    uint16_t v[AV_INTEGER_SIZE];
+} AVInteger;
+
+AVInteger av_add_i(AVInteger a, AVInteger b);
+AVInteger av_sub_i(AVInteger a, AVInteger b);
+
+/**
+ * returns the rounded down value of the logarithm of base 2 of the given AVInteger.
+ * this is simply the index of the most significant bit which is 1. Or 0 of all bits are 0
+ */
+int av_log2_i(AVInteger a);
+AVInteger av_mul_i(AVInteger a, AVInteger b);
+
+/**
+ * returns 0 if a==b, 1 if a>b and -1 if a<b.
+ */
+int av_cmp_i(AVInteger a, AVInteger b);
+
+/**
+ * bitwise shift.
+ * @param s the number of bits by which the value should be shifted right, may be negative for shifting left
+ */
+AVInteger av_shr_i(AVInteger a, int s);
+
+/**
+ * returns a % b.
+ * @param quot a/b will be stored here
+ */
+AVInteger av_mod_i(AVInteger *quot, AVInteger a, AVInteger b);
+
+/**
+ * returns a/b.
+ */
+AVInteger av_div_i(AVInteger a, AVInteger b);
+
+/**
+ * converts the given int64_t to an AVInteger.
+ */
+AVInteger av_int2i(int64_t a);
+
+/**
+ * converts the given AVInteger to an int64_t.
+ * if the AVInteger is too large to fit into an int64_t,
+ * then only the least significant 64bit will be used
+ */
+int64_t av_i2int(AVInteger a);
+
+#endif // INTEGER_H