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diff --git a/media/ffvpx/libavutil/sfc64.h b/media/ffvpx/libavutil/sfc64.h
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+++ b/media/ffvpx/libavutil/sfc64.h
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+/*
+ * Copyright (c) 2024 Michael Niedermayer <michael-ffmpeg@niedermayer.cc>
+ *
+ * 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
+ * simple Pseudo Random Number Generator
+ *
+ * This is a implementation of SFC64, a 64-bit PRNG by Chris Doty-Humphrey.
+ *
+ * This Generator is much faster (0m1.872s) than 64bit KISS (0m3.823s) and PCG-XSH-RR-64/32 (0m2.700s)
+ * And passes testu01 and practrand test suits.
+ */
+
+#ifndef AVUTIL_SFC64_H
+#define AVUTIL_SFC64_H
+
+#include <inttypes.h>
+
+typedef struct FFSFC64 {
+    uint64_t a,b,c,counter;
+} FFSFC64;
+
+static inline uint64_t ff_sfc64_get(FFSFC64 *s) {
+    uint64_t tmp = s->a + s->b + s->counter++;
+    s->a = s->b ^ (s->b >> 11);
+    s->b = s->c + (s->c << 3); // This is a multiply by 9
+    s->c = (s->c << 24 | s->c >> 40) + tmp;
+    return tmp;
+}
+
+/**
+ * Return the previous random value, and step the generator backward.
+ *
+ * It is safe to take values before the first, but such values can be highly
+ * correlated to the seeds.
+ */
+static inline uint64_t ff_sfc64_reverse_get(FFSFC64 *s) {
+    uint64_t prev_c = s->b * 0x8E38E38E38E38E39;
+    uint64_t tmp = s->c - (prev_c << 24 | prev_c >> 40);
+    s->b = s->a ^ (s->a >> 11);
+    s->b ^= s->b >> 22;
+    s->b ^= s->b >> 44;
+
+    s->a = tmp - s->b - --s->counter;
+    s->c = prev_c;
+
+    return tmp;
+}
+
+/**
+ * Initialize sfc64 with up to 3 seeds.
+ *
+ * @param rounds number of rounds mixing up state during init. Generally 8-18, larger numbers will help with bad quality seeds.
+ *               12 is a good choice if all 3 seeds are equal
+ *
+ */
+static inline void ff_sfc64_init(FFSFC64 *s, uint64_t seeda, uint64_t seedb, uint64_t seedc, int rounds) {
+    s->a       = seeda;
+    s->b       = seedb;
+    s->c       = seedc;
+    s->counter = 1;
+    while (rounds--)
+        ff_sfc64_get(s);
+}
+
+#endif // AVUTIL_SFC64_H