mirror of
https://github.com/musix-org/musix-oss
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79 lines
2.8 KiB
C
79 lines
2.8 KiB
C
/* Copyright (c) 2011 Xiph.Org Foundation
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Written by Gregory Maxwell */
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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static OPUS_INLINE void deb2_impl(unsigned char *_t,unsigned char **_p,int _k,int _x,int _y)
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{
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int i;
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if(_x>2){
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if(_y<3)for(i=0;i<_y;i++)*(--*_p)=_t[i+1];
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}else{
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_t[_x]=_t[_x-_y];
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deb2_impl(_t,_p,_k,_x+1,_y);
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for(i=_t[_x-_y]+1;i<_k;i++){
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_t[_x]=i;
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deb2_impl(_t,_p,_k,_x+1,_x);
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}
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}
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}
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/*Generates a De Bruijn sequence (k,2) with length k^2*/
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static OPUS_INLINE void debruijn2(int _k, unsigned char *_res)
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{
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unsigned char *p;
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unsigned char *t;
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t=malloc(sizeof(unsigned char)*_k*2);
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memset(t,0,sizeof(unsigned char)*_k*2);
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p=&_res[_k*_k];
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deb2_impl(t,&p,_k,1,1);
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free(t);
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}
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/*MWC RNG of George Marsaglia*/
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static opus_uint32 Rz, Rw;
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static OPUS_INLINE opus_uint32 fast_rand(void)
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{
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Rz=36969*(Rz&65535)+(Rz>>16);
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Rw=18000*(Rw&65535)+(Rw>>16);
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return (Rz<<16)+Rw;
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}
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static opus_uint32 iseed;
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#ifdef __GNUC__
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__attribute__((noreturn))
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#endif
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static OPUS_INLINE void _test_failed(const char *file, int line)
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{
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fprintf(stderr,"\n ***************************************************\n");
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fprintf(stderr," *** A fatal error was detected. ***\n");
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fprintf(stderr," ***************************************************\n");
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fprintf(stderr,"Please report this failure and include\n");
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fprintf(stderr,"'make check SEED=%u fails %s at line %d for %s'\n",iseed,file,line,opus_get_version_string());
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fprintf(stderr,"and any relevant details about your system.\n\n");
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abort();
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}
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#define test_failed() _test_failed(__FILE__, __LINE__);
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