Update public FFmpeg header files from r16647 to r18286.

third_party/ffmpeg/include/libavutil/random.h

Index: third_party/ffmpeg/include/libavutil/random.h
diff --git a/third_party/ffmpeg/include/libavutil/random.h b/third_party/ffmpeg/include/libavutil/random.h
deleted file mode 100644
index f243676e7c00aa366cacd583585887ca7aaf9838..0000000000000000000000000000000000000000
--- a/third_party/ffmpeg/include/libavutil/random.h
+++ /dev/null
@@ -1,73 +0,0 @@
-/*
- * Mersenne Twister Random Algorithm
- * Copyright (c) 2006 Ryan Martell.
- * Based on A C-program for MT19937, with initialization improved 2002/1/26. Coded by
- * Takuji Nishimura and Makoto Matsumoto.
- *
- * 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_RANDOM_H
-#define AVUTIL_RANDOM_H
-
-#define AV_RANDOM_N 624
-
-typedef struct {
-    unsigned int mt[AV_RANDOM_N]; ///< the array for the state vector
-    int index; ///< Current untempered value we use as the base.
-} AVRandomState;
-
-
-void av_init_random(unsigned int seed, AVRandomState *state); ///< To be inlined, the struct must be visible. So it does not make sense to try and keep it opaque with malloc/free-like calls.
-void av_random_generate_untempered_numbers(AVRandomState *state); ///< Regenerate the untempered numbers (must be done every 624 iterations, or it will loop).
-
-/**
- * Generates a random number from the interval [0,0xffffffff].
- *
- * Please do NOT use the Mersenne Twister, it is slow. Use the random generator
- * from lfg.c/h or a simple LCG like state= state*1664525+1013904223.
- * If you still choose to use MT, expect that you will have to provide
- * some evidence that it makes a difference for the case where you use it.
- */
-static inline unsigned int av_random(AVRandomState *state)
-{
-    unsigned int y;
-
-    // Regenerate the untempered numbers if we should...
-    if (state->index >= AV_RANDOM_N)
-        av_random_generate_untempered_numbers(state);
-
-    // Grab one...
-    y = state->mt[state->index++];
-
-    /* Now temper (Mersenne Twister coefficients). The coefficients for MT19937 are.. */
-    y ^= (y >> 11);
-    y ^= (y << 7) & 0x9d2c5680;
-    y ^= (y << 15) & 0xefc60000;
-    y ^= (y >> 18);
-
-    return y;
-}
-
-/** Return random in range [0-1] as double. */
-static inline double av_random_real1(AVRandomState *state)
-{
-    /* divided by 2^32-1 */
-    return av_random(state) * (1.0 / 4294967296.0);
-}
-
-#endif /* AVUTIL_RANDOM_H */