/******************************************************************** * * * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. * * * * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * * * * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 * * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ * * * ******************************************************************** function: miscellaneous math and prototypes ********************************************************************/ //#include "config-tremor.h" #ifndef _V_RANDOM_H_ #define _V_RANDOM_H_ //#include "ivorbiscodec.h" //#include "os_types.h" #include "asm_arm.h" #include "asm_mcf5249.h" /* Some prototypes that were not defined elsewhere */ //void *_vorbis_block_alloc(vorbis_block *vb,long bytes); //void _vorbis_block_ripcord(vorbis_block *vb); //extern int _ilog(unsigned int v); #ifndef _V_WIDE_MATH #define _V_WIDE_MATH #ifndef ROCKBOX #include #endif /* ROCKBOX */ #ifndef _LOW_ACCURACY_ /* 64 bit multiply */ /* #include */ #ifdef ROCKBOX_LITTLE_ENDIAN union magic { struct { int32_t lo; int32_t hi; } halves; int64_t whole; }; #elif defined(ROCKBOX_BIG_ENDIAN) union magic { struct { int32_t hi; int32_t lo; } halves; int64_t whole; }; #endif static inline int32_t MULT32(int32_t x, int32_t y) { union magic magic; magic.whole = (int64_t)x * y; return magic.halves.hi; } static inline int32_t MULT31(int32_t x, int32_t y) { return MULT32(x,y)<<1; } static inline int32_t MULT31_SHIFT15(int32_t x, int32_t y) { union magic magic; magic.whole = (int64_t)x * y; return ((uint32_t)(magic.halves.lo)>>15) | ((magic.halves.hi)<<17); } #else /* 32 bit multiply, more portable but less accurate */ /* * Note: Precision is biased towards the first argument therefore ordering * is important. Shift values were chosen for the best sound quality after * many listening tests. */ /* * For MULT32 and MULT31: The second argument is always a lookup table * value already preshifted from 31 to 8 bits. We therefore take the * opportunity to save on text space and use unsigned char for those * tables in this case. */ static inline int32_t MULT32(int32_t x, int32_t y) { return (x >> 9) * y; /* y preshifted >>23 */ } static inline int32_t MULT31(int32_t x, int32_t y) { return (x >> 8) * y; /* y preshifted >>23 */ } static inline int32_t MULT31_SHIFT15(int32_t x, int32_t y) { return (x >> 6) * y; /* y preshifted >>9 */ } #endif /* * The XPROD functions are meant to optimize the cross products found all * over the place in mdct.c by forcing memory operation ordering to avoid * unnecessary register reloads as soon as memory is being written to. * However this is only beneficial on CPUs with a sane number of general * purpose registers which exclude the Intel x86. On Intel, better let the * compiler actually reload registers directly from original memory by using * macros. */ /* replaced XPROD32 with a macro to avoid memory reference _x, _y are the results (must be l-values) */ #define XPROD32(_a, _b, _t, _v, _x, _y) \ { (_x)=MULT32(_a,_t)+MULT32(_b,_v); \ (_y)=MULT32(_b,_t)-MULT32(_a,_v); } #ifdef __i386__ #define XPROD31(_a, _b, _t, _v, _x, _y) \ { *(_x)=MULT31(_a,_t)+MULT31(_b,_v); \ *(_y)=MULT31(_b,_t)-MULT31(_a,_v); } #define XNPROD31(_a, _b, _t, _v, _x, _y) \ { *(_x)=MULT31(_a,_t)-MULT31(_b,_v); \ *(_y)=MULT31(_b,_t)+MULT31(_a,_v); } #else static inline void XPROD31(int32_t a, int32_t b, int32_t t, int32_t v, int32_t *x, int32_t *y) { *x = MULT31(a, t) + MULT31(b, v); *y = MULT31(b, t) - MULT31(a, v); } static inline void XNPROD31(int32_t a, int32_t b, int32_t t, int32_t v, int32_t *x, int32_t *y) { *x = MULT31(a, t) - MULT31(b, v); *y = MULT31(b, t) + MULT31(a, v); } #endif #define XPROD31_R(_a, _b, _t, _v, _x, _y)\ {\ _x = MULT31(_a, _t) + MULT31(_b, _v);\ _y = MULT31(_b, _t) - MULT31(_a, _v);\ } #define XNPROD31_R(_a, _b, _t, _v, _x, _y)\ {\ _x = MULT31(_a, _t) - MULT31(_b, _v);\ _y = MULT31(_b, _t) + MULT31(_a, _v);\ } #ifndef _V_VECT_OPS #define _V_VECT_OPS static inline void vect_add(int32_t *x, int32_t *y, int n) { while (n>0) { *x++ += *y++; n--; } } static inline void vect_copy(int32_t *x, int32_t *y, int n) { while (n>0) { *x++ = *y++; n--; } } static inline void vect_mult_fw(int32_t *data, int32_t *window, int n) { while(n>0) { *data = MULT31(*data, *window); data++; window++; n--; } } static inline void vect_mult_bw(int32_t *data, int32_t *window, int n) { while(n>0) { *data = MULT31(*data, *window); data++; window--; n--; } } #endif #endif /* not used anymore */ /* #ifndef _V_CLIP_MATH #define _V_CLIP_MATH static inline int32_t CLIP_TO_15(int32_t x) { int ret=x; ret-= ((x<=32767)-1)&(x-32767); ret-= ((x>=-32768)-1)&(x+32768); return(ret); } #endif */ static inline int32_t VFLOAT_MULT(int32_t a,int32_t ap, int32_t b,int32_t bp, int32_t *p){ if(a && b){ #ifndef _LOW_ACCURACY_ *p=ap+bp+32; return MULT32(a,b); #else *p=ap+bp+31; return (a>>15)*(b>>16); #endif }else return 0; } /*static inline int32_t VFLOAT_MULTI(int32_t a,int32_t ap, int32_t i, int32_t *p){ int ip=_ilog(abs(i))-31; return VFLOAT_MULT(a,ap,i<<-ip,ip,p); } */ static inline int32_t VFLOAT_ADD(int32_t a,int32_t ap, int32_t b,int32_t bp, int32_t *p){ if(!a){ *p=bp; return b; }else if(!b){ *p=ap; return a; } /* yes, this can leak a bit. */ if(ap>bp){ int shift=ap-bp+1; *p=ap+1; a>>=1; if(shift<32){ b=(b+(1<<(shift-1)))>>shift; }else{ b=0; } }else{ int shift=bp-ap+1; *p=bp+1; b>>=1; if(shift<32){ a=(a+(1<<(shift-1)))>>shift; }else{ a=0; } } a+=b; if((a&0xc0000000)==0xc0000000 || (a&0xc0000000)==0){ a<<=1; (*p)--; } return(a); } #endif '#n112'>112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 
/* Emacs style mode select   -*- C++ -*-
 *-----------------------------------------------------------------------------
 *
 *
 *  PrBoom a Doom port merged with LxDoom and LSDLDoom
 *  based on BOOM, a modified and improved DOOM engine
 *  Copyright (C) 1999 by
 *  id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
 *  Copyright (C) 1999-2000 by
 *  Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version 2
 *  of the License, or (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 *  02111-1307, USA.
 *
 * DESCRIPTION:
 *  Action routines for lighting thinkers
 *  Spawn sector based lighting effects.
 *  Handle lighting linedef types
 *
 *-----------------------------------------------------------------------------*/

#include "doomstat.h" //jff 5/18/98
#include "doomdef.h"
#include "m_random.h"
#include "r_main.h"
#include "p_spec.h"
#include "p_tick.h"

//////////////////////////////////////////////////////////
//
// Lighting action routines, called once per tick
//
//////////////////////////////////////////////////////////

//
// T_FireFlicker()
//
// Firelight flicker action routine, called once per tick
//
// Passed a fireflicker_t structure containing light levels and timing
// Returns nothing
//
void T_FireFlicker (fireflicker_t* flick)
{
   int amount;

   if (--flick->count)
      return;

   amount = (P_Random(pr_lights)&3)*16;

   if (flick->sector->lightlevel - amount < flick->minlight)
      flick->sector->lightlevel = flick->minlight;
   else
      flick->sector->lightlevel = flick->maxlight - amount;

   flick->count = 4;
}

//
// T_LightFlash()
//
// Broken light flashing action routine, called once per tick
//
// Passed a lightflash_t structure containing light levels and timing
// Returns nothing
//
void T_LightFlash (lightflash_t* flash)
{
   if (--flash->count)
      return;

   if (flash->sector->lightlevel == flash->maxlight)
   {
      flash-> sector->lightlevel = flash->minlight;
      flash->count = (P_Random(pr_lights)&flash->mintime)+1;
   }
   else
   {
      flash-> sector->lightlevel = flash->maxlight;
      flash->count = (P_Random(pr_lights)&flash->maxtime)+1;
   }

}

//
// T_StrobeFlash()
//
// Strobe light flashing action routine, called once per tick
//
// Passed a strobe_t structure containing light levels and timing
// Returns nothing
//
void T_StrobeFlash (strobe_t*   flash)
{
   if (--flash->count)
      return;

   if (flash->sector->lightlevel == flash->minlight)
   {
      flash-> sector->lightlevel = flash->maxlight;
      flash->count = flash->brighttime;
   }
   else
   {
      flash-> sector->lightlevel = flash->minlight;
      flash->count =flash->darktime;
   }
}

//
// T_Glow()
//
// Glowing light action routine, called once per tick
//
// Passed a glow_t structure containing light levels and timing
// Returns nothing
//

void T_Glow(glow_t* g)
{
   switch(g->direction)
   {
   case -1:
      // light dims
      g->sector->lightlevel -= GLOWSPEED;
      if (g->sector->lightlevel <= g->minlight)
      {
         g->sector->lightlevel += GLOWSPEED;
         g->direction = 1;
      }
      break;

   case 1:
      // light brightens
      g->sector->lightlevel += GLOWSPEED;
      if (g->sector->lightlevel >= g->maxlight)
      {
         g->sector->lightlevel -= GLOWSPEED;
         g->direction = -1;
      }
      break;
   }
}

//////////////////////////////////////////////////////////
//
// Sector lighting type spawners
//
// After the map has been loaded, each sector is scanned
// for specials that spawn thinkers
//
//////////////////////////////////////////////////////////

//
// P_SpawnFireFlicker()
//
// Spawns a fire flicker lighting thinker
//
// Passed the sector that spawned the thinker
// Returns nothing
//
void P_SpawnFireFlicker (sector_t*  sector)
{
   fireflicker_t*  flick;

   // Note that we are resetting sector attributes.
   // Nothing special about it during gameplay.
   sector->special &= ~31; //jff 3/14/98 clear non-generalized sector type

   flick = Z_Malloc ( sizeof(*flick), PU_LEVSPEC, 0);

   P_AddThinker (&flick->thinker);

   flick->thinker.function = T_FireFlicker;
   flick->sector = sector;
   flick->maxlight = sector->lightlevel;
   flick->minlight = P_FindMinSurroundingLight(sector,sector->lightlevel)+16;
   flick->count = 4;
}

//
// P_SpawnLightFlash()
//
// Spawns a broken light flash lighting thinker
//
// Passed the sector that spawned the thinker
// Returns nothing
//
void P_SpawnLightFlash (sector_t* sector)
{
   lightflash_t* flash;

   // nothing special about it during gameplay
   sector->special &= ~31; //jff 3/14/98 clear non-generalized sector type

   flash = Z_Malloc ( sizeof(*flash), PU_LEVSPEC, 0);

   P_AddThinker (&flash->thinker);

   flash->thinker.function = T_LightFlash;
   flash->sector = sector;
   flash->maxlight = sector->lightlevel;

   flash->minlight = P_FindMinSurroundingLight(sector,sector->lightlevel);
   flash->maxtime = 64;
   flash->mintime = 7;
   flash->count = (P_Random(pr_lights)&flash->maxtime)+1;
}

//
// P_SpawnStrobeFlash
//
// Spawns a blinking light thinker
//
// Passed the sector that spawned the thinker, speed of blinking
// and whether blinking is to by syncrhonous with other sectors
//
// Returns nothing
//
void P_SpawnStrobeFlash
( sector_t* sector,
  int   fastOrSlow,
  int   inSync )
{
   strobe_t* flash;

   flash = Z_Malloc ( sizeof(*flash), PU_LEVSPEC, 0);

   P_AddThinker (&flash->thinker);

   flash->sector = sector;
   flash->darktime = fastOrSlow;
   flash->brighttime = STROBEBRIGHT;
   flash->thinker.function = T_StrobeFlash;
   flash->maxlight = sector->lightlevel;
   flash->minlight = P_FindMinSurroundingLight(sector, sector->lightlevel);

   if (flash->minlight == flash->maxlight)
      flash->minlight = 0;

   // nothing special about it during gameplay
   sector->special &= ~31; //jff 3/14/98 clear non-generalized sector type

   if (!inSync)
      flash->count = (P_Random(pr_lights)&7)+1;
   else
      flash->count = 1;
}

//
// P_SpawnGlowingLight()
//
// Spawns a glowing light (smooth oscillation from min to max) thinker
//
// Passed the sector that spawned the thinker
// Returns nothing
//
void P_SpawnGlowingLight(sector_t*  sector)
{
   glow_t* g;

   g = Z_Malloc( sizeof(*g), PU_LEVSPEC, 0);

   P_AddThinker(&g->thinker);

   g->sector = sector;
   g->minlight = P_FindMinSurroundingLight(sector,sector->lightlevel);
   g->maxlight = sector->lightlevel;
   g->thinker.function = T_Glow;
   g->direction = -1;

   sector->special &= ~31; //jff 3/14/98 clear non-generalized sector type
}

//////////////////////////////////////////////////////////
//
// Linedef lighting function handlers
//
//////////////////////////////////////////////////////////

//
// EV_StartLightStrobing()
//
// Start strobing lights (usually from a trigger)
//
// Passed the line that activated the strobing
// Returns true