aboutsummaryrefslogtreecommitdiffstats
path: root/make/stub_includes/libav/libavutil/lfg.h
diff options
context:
space:
mode:
Diffstat (limited to 'make/stub_includes/libav/libavutil/lfg.h')
-rw-r--r--make/stub_includes/libav/libavutil/lfg.h62
1 files changed, 0 insertions, 62 deletions
diff --git a/make/stub_includes/libav/libavutil/lfg.h b/make/stub_includes/libav/libavutil/lfg.h
deleted file mode 100644
index 904d00a66..000000000
--- a/make/stub_includes/libav/libavutil/lfg.h
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * Lagged Fibonacci PRNG
- * Copyright (c) 2008 Michael Niedermayer
- *
- * This file is part of Libav.
- *
- * 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.
- *
- * 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 Libav; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef AVUTIL_LFG_H
-#define AVUTIL_LFG_H
-
-typedef struct {
- unsigned int state[64];
- int index;
-} AVLFG;
-
-void av_lfg_init(AVLFG *c, unsigned int seed);
-
-/**
- * Get the next random unsigned 32-bit number using an ALFG.
- *
- * Please also consider a simple LCG like state= state*1664525+1013904223,
- * it may be good enough and faster for your specific use case.
- */
-static inline unsigned int av_lfg_get(AVLFG *c){
- c->state[c->index & 63] = c->state[(c->index-24) & 63] + c->state[(c->index-55) & 63];
- return c->state[c->index++ & 63];
-}
-
-/**
- * Get the next random unsigned 32-bit number using a MLFG.
- *
- * Please also consider av_lfg_get() above, it is faster.
- */
-static inline unsigned int av_mlfg_get(AVLFG *c){
- unsigned int a= c->state[(c->index-55) & 63];
- unsigned int b= c->state[(c->index-24) & 63];
- return c->state[c->index++ & 63] = 2*a*b+a+b;
-}
-
-/**
- * Get the next two numbers generated by a Box-Muller Gaussian
- * generator using the random numbers issued by lfg.
- *
- * @param out array where the two generated numbers are placed
- */
-void av_bmg_get(AVLFG *lfg, double out[2]);
-
-#endif /* AVUTIL_LFG_H */