add some code

managed_components/78__esp-opus/dnn/kiss99.c

@@ -0,0 +1,81 @@
+/*Daala video codec
+Copyright (c) 2012 Daala project contributors.  All rights reserved.
+Author: Timothy B. Terriberry
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+- Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+- Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS”
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "kiss99.h"
+
+void kiss99_srand(kiss99_ctx *_this,const unsigned char *_data,int _ndata){
+  int i;
+  _this->z=362436069;
+  _this->w=521288629;
+  _this->jsr=123456789;
+  _this->jcong=380116160;
+  for(i=3;i<_ndata;i+=4){
+    _this->z^=_data[i-3];
+    _this->w^=_data[i-2];
+    _this->jsr^=_data[i-1];
+    _this->jcong^=_data[i];
+    kiss99_rand(_this);
+  }
+  if(i-3<_ndata)_this->z^=_data[i-3];
+  if(i-2<_ndata)_this->w^=_data[i-2];
+  if(i-1<_ndata)_this->jsr^=_data[i-1];
+  /*Fix any potential short cycles that show up.
+    These are not too likely, given the way we initialize the state, but they
+     are technically possible, so let us go ahead and eliminate that
+     possibility.
+    See Gregory G. Rose: "KISS: A Bit Too Simple", Cryptographic Communications
+     No. 10, pp. 123---137, 2018.*/
+  if(_this->z==0||_this->z==0x9068FFFF)_this->z++;
+  if(_this->w==0||_this->w==0x464FFFFF)_this->w++;
+  if(_this->jsr==0)_this->jsr++;
+}
+
+uint32_t kiss99_rand(kiss99_ctx *_this){
+  uint32_t znew;
+  uint32_t wnew;
+  uint32_t mwc;
+  uint32_t shr3;
+  uint32_t cong;
+  znew=36969*(_this->z&0xFFFF)+(_this->z>>16);
+  wnew=18000*(_this->w&0xFFFF)+(_this->w>>16);
+  mwc=(znew<<16)+wnew;
+  /*We swap the 13 and 17 from the original 1999 algorithm to produce a single
+     cycle of maximal length, matching KISS11.
+    We are not actually using KISS11 because of the impractically large (16 MB)
+     internal state of the full algorithm.*/
+  shr3=_this->jsr^(_this->jsr<<13);
+  shr3^=shr3>>17;
+  shr3^=shr3<<5;
+  cong=69069*_this->jcong+1234567;
+  _this->z=znew;
+  _this->w=wnew;
+  _this->jsr=shr3;
+  _this->jcong=cong;
+  return (mwc^cong)+shr3;
+}