From 0cb3ad58b3033ec1b78cc74943775e27ae7faeca Mon Sep 17 00:00:00 2001 From: Mohamed Tarek Date: Mon, 11 May 2009 23:35:50 +0000 Subject: -Took cook_random() from an old cook.c revision [6 mar 2007], which is a simple RNG, to eliminate the need for lfg.c/h. -Remove lfg.c/h and md5.c/h as they are no longer needed and use the more common form of my name in docs/COMMITTERS. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20915 a1c6a512-1295-4272-9138-f99709370657 --- apps/codecs/libcook/libavutil/lfg.h | 54 ------------------------------------- 1 file changed, 54 deletions(-) delete mode 100644 apps/codecs/libcook/libavutil/lfg.h (limited to 'apps/codecs/libcook/libavutil/lfg.h') diff --git a/apps/codecs/libcook/libavutil/lfg.h b/apps/codecs/libcook/libavutil/lfg.h deleted file mode 100644 index 3250c18e79..0000000000 --- a/apps/codecs/libcook/libavutil/lfg.h +++ /dev/null @@ -1,54 +0,0 @@ -/* - * Lagged Fibonacci PRNG - * Copyright (c) 2008 Michael Niedermayer - * - * 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_LFG_H -#define AVUTIL_LFG_H - -typedef struct { - unsigned int state[64]; - int index; -} AVLFG; - -void av_lfg_init(AVLFG *c, unsigned int seed); - -/** - * Gets 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]; -} - -/** - * Gets 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; -} - -#endif /* AVUTIL_LFG_H */ -- cgit v1.2.3