server/scsynth/SC_Graph.cpp

   1 /*
   2         SuperCollider real time audio synthesis system
   3     Copyright (c) 2002 James McCartney. All rights reserved.
   4         http://www.audiosynth.com
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
  19 */
  20
  21
  22 #include "SC_Graph.h"
  23 #include "SC_GraphDef.h"
  24 #include "SC_Unit.h"
  25 #include "SC_UnitSpec.h"
  26 #include "SC_UnitDef.h"
  27 #include "SC_HiddenWorld.h"
  28 #include "SC_Wire.h"
  29 #include "SC_WireSpec.h"
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include "SC_Prototypes.h"
  33 #include "SC_Errors.h"
  34 #include "Unroll.h"
  35
  36 void Unit_ChooseMulAddFunc(Unit* unit);
  37
  38 ////////////////////////////////////////////////////////////////////////////////
  39
  40 void Graph_FirstCalc(Graph *inGraph);
  41
  42 void Graph_Dtor(Graph *inGraph)
  43 {
  44         //scprintf("->Graph_Dtor %d\n", inGraph->mNode.mID);
  45         World *world = inGraph->mNode.mWorld;
  46         int numUnits = inGraph->mNumUnits;
  47         Unit** graphUnits = inGraph->mUnits;
  48         if (inGraph->mNode.mCalcFunc != (NodeCalcFunc)Graph_FirstCalc) {
  49                 // the above test insures that dtors are not called if ctors have not been called.
  50                 for (int i = 0; i<numUnits; ++i) {
  51                         Unit *unit = graphUnits[i];
  52                         UnitDtorFunc dtor = unit->mUnitDef->mUnitDtorFunc;
  53                         if (dtor) (dtor)(unit);
  54                 }
  55         }
  56         world->mNumUnits -= numUnits;
  57         world->mNumGraphs --;
  58
  59         GraphDef* def = GRAPHDEF(inGraph);
  60         if (--def->mRefCount <= 0) {
  61                 if (world->mRealTime) GraphDef_DeleteMsg(world, def);
  62                 else GraphDef_Free(def);
  63         }
  64
  65         Node_Dtor(&inGraph->mNode);
  66         //scprintf("<-Graph_Dtor\n");
  67 }
  68
  69 ////////////////////////////////////////////////////////////////////////////////
  70
  71 int Graph_New(struct World *inWorld, struct GraphDef *inGraphDef, int32 inID,
  72               struct sc_msg_iter* args, Graph** outGraph,bool argtype)//true for normal args , false for setn type args
  73 {
  74         Graph* graph;
  75         int err = Node_New(inWorld, &inGraphDef->mNodeDef, inID, (Node**)&graph);
  76         if (err) return err;
  77         Graph_Ctor(inWorld, inGraphDef, graph, args,argtype);
  78         *outGraph = graph;
  79         return err;
  80 }
  81
  82
  83 void Graph_Ctor(World *inWorld, GraphDef *inGraphDef, Graph *graph, sc_msg_iter *msg,bool argtype)//true for normal args , false for setn type args
  84 {
  85         //scprintf("->Graph_Ctor\n");
  86
  87         // hit the memory allocator only once.
  88         char *memory = (char*)graph + sizeof(Graph);
  89
  90         // allocate space for children
  91         int numUnits = inGraphDef->mNumUnitSpecs;
  92         graph->mNumUnits = numUnits;
  93         inWorld->mNumUnits += numUnits;
  94         inWorld->mNumGraphs ++;
  95
  96         graph->mUnits = (Unit**)memory;
  97         memory += inGraphDef->mUnitsAllocSize;
  98
  99         // set calc func
 100         graph->mNode.mCalcFunc = (NodeCalcFunc)&Graph_FirstCalc;
 101
 102         // allocate wires
 103         graph->mNumWires = inGraphDef->mNumWires;
 104         graph->mWire = (Wire*)memory;
 105         memory += inGraphDef->mWiresAllocSize;
 106
 107         graph->mNumCalcUnits = inGraphDef->mNumCalcUnits;
 108         graph->mCalcUnits = (Unit**)memory;
 109         memory += inGraphDef->mCalcUnitsAllocSize;
 110
 111         // initialize controls
 112         int numControls = inGraphDef->mNumControls;
 113         graph->mNumControls = numControls;
 114         graph->mControls = (float*)memory;
 115         memory += inGraphDef->mControlAllocSize;
 116
 117         graph->mMapControls = (float**)memory;
 118         memory += inGraphDef->mMapControlsAllocSize;
 119
 120         graph->mControlRates = (int*)memory;
 121         memory += inGraphDef->mMapControlRatesAllocSize;
 122
 123         {
 124                 float*  graphControls = graph->mControls;
 125                 float*  initialControlValues = inGraphDef->mInitialControlValues;
 126                 float** graphMapControls = graph->mMapControls;
 127                 /* add */
 128                 int* graphControlRates = graph->mControlRates;
 129                 for (int i=0; i<numControls; ++i, ++graphControls) {
 130                         *graphControls = initialControlValues[i];
 131                         graphMapControls[i] = graphControls;
 132                         /* add */
 133                         graphControlRates[i] = 0;  // init to 0 for now... control bus is 1, audio is 2
 134                 }
 135         }
 136
 137         // set controls
 138         //if argtype == true -> normal args as always
 139         //if argtype == false -> setn type args
 140     if(argtype) {
 141         while( msg->remain()>=8) {
 142             int i = 0;
 143             int loop = 0;
 144             if (msg->nextTag('i') == 's') {
 145                 int32* name = msg->gets4();
 146                 int32 hash = Hash(name);
 147                 do {
 148                     switch (msg->nextTag('f') ) {
 149                         case  'f' :
 150                         case  'i' :
 151                         {
 152                                 float32 value = msg->getf();
 153                                 Graph_SetControl(graph, hash, name, i, value);
 154                                 break;
 155                         }
 156                         case 's' :
 157                         {
 158                                 const char* string = msg->gets();
 159                                 if ( *string == 'c') {
 160                                         int bus = sc_atoi(string+1);
 161                                         Graph_MapControl(graph, hash, name, i, bus);
 162                                 } else {
 163                                     if (*string == 'a') {
 164                                         int bus = sc_atoi(string+1);
 165                                         Graph_MapAudioControl(graph, hash, name, i, bus);
 166                                     }
 167                                 }
 168                                 break;
 169                         }
 170                         case ']':
 171                             msg->count++;
 172                             loop -= 1;
 173                             break;
 174                         case '[':
 175                             msg->count++;
 176                             loop += 1;
 177                             i -= 1;
 178                             break;
 179                     }
 180                     ++i;
 181                 }
 182                 while (loop);
 183             } else {
 184                 int32 index = msg->geti();
 185                 do {
 186                     switch (msg->nextTag('f') ) {
 187                         case  'f' :
 188                         case  'i' :
 189                         {
 190                                 float32 value = msg->getf();
 191                                 Graph_SetControl(graph, index + i, value);
 192                                 break;
 193                         }
 194                         case 's' :
 195                         {
 196                                 const char* string = msg->gets();
 197                                 if ( *string == 'c') {
 198                                         int bus = sc_atoi(string+1);
 199                                         Graph_MapControl(graph, index + i, bus);
 200                                 } else {
 201                                     if (*string == 'a') {
 202                                         int bus = sc_atoi(string+1);
 203                                         Graph_MapAudioControl(graph, index + i, bus);
 204                                     }
 205                                 }
 206                                 break;
 207                         }
 208                         case ']':
 209                             msg->count++;
 210                             loop -= 1;
 211                             break;
 212                         case '[':
 213                             msg->count++;
 214                             loop += 1;
 215                             i -= 1;
 216                             break;
 217                     }
 218                     ++i;
 219                 }
 220                 while (loop);
 221             }
 222         }
 223
 224     }
 225
 226
 227             //{
 228 //          while( msg->remain()>=8) {
 229 //              int i = 0;
 230 //              int loop = 0;
 231 //              if (msg->nextTag('i') == 's') {
 232 //                  int32* name = msg->gets4();
 233 //                  int32 hash = Hash(name);
 234 //                  if (msg->nextTag('f') == '[' ) {
 235 //                          msg->count++;
 236 //                          loop = 1;
 237 //                  }
 238 //                  do {
 239 //                      if (msg->nextTag('f') == 's' ) {
 240 //                          const char* string = msg->gets();
 241 //                          if ( *string == 'c') {
 242 //                              int bus = sc_atoi(string+1);
 243 //                              Graph_MapControl(graph, hash, name, i, bus);
 244 //                          }
 245 //                      } else {
 246 //                          if (msg->nextTag('f') == ']' ) {
 247 //                              msg->count++;
 248 //                              loop = 0;
 249 //                          } else {
 250 //                              float32 value = msg->getf();
 251 //                              Graph_SetControl(graph, hash, name, i, value);
 252 //                          }
 253 //                      }
 254 //                      ++i;
 255 //                  }
 256 //                  while (loop);
 257 //              } else {
 258 //                  int32 index = msg->geti();
 259 //                  if (msg->nextTag('f') == '[' ) {
 260 //                      msg->count++;
 261 //                      loop = 1;
 262 //                  }
 263 //                  do {
 264 //                      if (msg->nextTag('f') == 's') {
 265 //                          const char* string = msg->gets();
 266 //                          if (*string == 'c') {
 267 //                              int bus = sc_atoi(string+1);
 268 //                              Graph_MapControl(graph, index + i, bus);
 269 //                          }
 270 //                      } else {
 271 //                          if (msg->nextTag('f') == ']' ) {
 272 //                              msg->count++;
 273 //                              loop = 0;
 274 //                          } else {
 275 //                              float32 value = msg->getf();
 276 //                              Graph_SetControl(graph, index + i, value);
 277 //                          }
 278 //                      }
 279 //                      ++i;
 280 //                  }
 281 //                  while (loop);
 282 //              }
 283 //          }
 284 //
 285 //      }
 286         else{
 287
 288           while (msg->remain()) {
 289                 if (msg->nextTag('i') == 's') {
 290                         int32* name = msg->gets4();
 291                         int32 hash = Hash(name);
 292                         int32 n = msg->geti();
 293                         for (int i=0; msg->remain() && i<n; ++i) {
 294                                 if (msg->nextTag('f') == 's') {
 295                                         const char* string = msg->gets();
 296                                         if (*string == 'c') {
 297                                                 int bus = sc_atoi(string+1);
 298                                                 Graph_MapControl(graph, hash, name, i, bus);
 299                                                 //Node_MapControl(node, hash, name, i, bus);
 300                                         } else {
 301                                             if (*string == 'a') {
 302                                                 int bus = sc_atoi(string+1);
 303                                                 Graph_MapAudioControl(graph, hash, name, i, bus);
 304                                             }
 305                                         }
 306                                 } else {
 307                                         float32 value = msg->getf();
 308                                         Graph_SetControl(graph, hash, name, i, value);
 309                                         //Node_SetControl(node, hash, name, i, value);
 310                                 }
 311                         }
 312                 } else {
 313                         int32 index = msg->geti();
 314                         int32 n = msg->geti();
 315                         for (int i=0; msg->remain() && i<n; ++i) {
 316                                 if (msg->nextTag('f') == 's') {
 317                                         const char* string = msg->gets();
 318                                         if (*string == 'c') {
 319                                                 int bus = sc_atoi(string+1);
 320                                                 Graph_MapControl(graph, index+i, bus);
 321                                                 //Node_MapControl(node, index+i, bus);
 322                                         } else {
 323                                             if (*string == 'a') {
 324                                                 int bus = sc_atoi(string+1);
 325                                                 Graph_MapAudioControl(graph, index + i, bus);
 326                                             }
 327                                         }
 328                                 } else {
 329                                         float32 value = msg->getf();
 330                                         Graph_SetControl(graph, index+i, value);
 331                                         //Node_SetControl(node, index+i, value);
 332                                 }
 333                         }
 334                 }
 335           }
 336         }
 337
 338         // set up scalar values
 339         Wire *graphWires = graph->mWire;
 340         int numConstants = inGraphDef->mNumConstants;
 341         {
 342                 float *constants = inGraphDef->mConstants;
 343                 Wire *wire = graphWires;
 344                 for (int i=0; i<numConstants; ++i, ++wire) {
 345                         wire->mFromUnit = 0;
 346                         wire->mCalcRate = calc_ScalarRate;
 347                         wire->mBuffer = &wire->mScalarValue;
 348                         wire->mScalarValue = constants[i];
 349                 }
 350         }
 351
 352         graph->mSampleOffset = inWorld->mSampleOffset;
 353         graph->mSubsampleOffset = inWorld->mSubsampleOffset;
 354         graph->mRGen = inWorld->mRGen; // defaults to rgen zero.
 355
 356         graph->mLocalAudioBusUnit = NULL;
 357         graph->mLocalControlBusUnit = NULL;
 358
 359         graph->localBufNum = 0;
 360         graph->localMaxBufNum = 0; // this is set from synth
 361
 362         // initialize units
 363         //scprintf("initialize units\n");
 364         Unit** calcUnits = graph->mCalcUnits;
 365         Unit** graphUnits = graph->mUnits;
 366         int calcCtr=0;
 367
 368         float *bufspace = inWorld->hw->mWireBufSpace;
 369         int wireCtr = numConstants;
 370         UnitSpec *unitSpec = inGraphDef->mUnitSpecs;
 371         for (int i=0; i<numUnits; ++i, ++unitSpec) {
 372                 // construct unit from spec
 373                 Unit *unit = Unit_New(inWorld, unitSpec, memory);
 374
 375                 // set parent
 376                 unit->mParent = graph;
 377                 unit->mParentIndex = i;
 378
 379                 graphUnits[i] = unit;
 380
 381                 {
 382                         // hook up unit inputs
 383                         //scprintf("hook up unit inputs\n");
 384                         InputSpec *inputSpec = unitSpec->mInputSpec;
 385                         Wire** unitInput = unit->mInput;
 386                         float** unitInBuf = unit->mInBuf;
 387                         int numInputs = unitSpec->mNumInputs;
 388                         for (int j=0; j<numInputs; ++j, ++inputSpec) {
 389                                 Wire *wire = graphWires + inputSpec->mWireIndex;
 390                                 unitInput[j] = wire;
 391                                 unitInBuf[j] = wire->mBuffer;
 392                         }
 393                 }
 394
 395                 {
 396                         // hook up unit outputs
 397                         //scprintf("hook up unit outputs\n");
 398                         Wire** unitOutput = unit->mOutput;
 399                         float** unitOutBuf = unit->mOutBuf;
 400                         int numOutputs = unitSpec->mNumOutputs;
 401                         Wire *wire = graphWires + wireCtr;
 402                         wireCtr += numOutputs;
 403                         int unitCalcRate = unit->mCalcRate;
 404                         if (unitCalcRate == calc_FullRate) {
 405                                 OutputSpec *outputSpec = unitSpec->mOutputSpec;
 406                                 for (int j=0; j<numOutputs; ++j, ++wire, ++outputSpec) {
 407                                         wire->mFromUnit = unit;
 408                                         wire->mCalcRate = calc_FullRate;
 409                                         wire->mBuffer = bufspace + outputSpec->mBufferIndex;
 410                                         unitOutput[j] = wire;
 411                                         unitOutBuf[j] = wire->mBuffer;
 412                                 }
 413                                 calcUnits[calcCtr++] = unit;
 414                         } else {
 415                                 for (int j=0; j<numOutputs; ++j, ++wire) {
 416                                         wire->mFromUnit = unit;
 417                                         wire->mCalcRate = unitCalcRate;
 418                                         wire->mBuffer = &wire->mScalarValue;
 419                                         unitOutput[j] = wire;
 420                                         unitOutBuf[j] = wire->mBuffer;
 421                                 }
 422                                 if (unitCalcRate == calc_BufRate) {
 423                                         calcUnits[calcCtr++] = unit;
 424                                 }
 425                         }
 426                 }
 427         }
 428
 429         inGraphDef->mRefCount ++ ;
 430 }
 431
 432 void Graph_RemoveID(World* inWorld, Graph *inGraph)
 433 {
 434         if (!World_RemoveNode(inWorld, &inGraph->mNode)) {
 435                 int err = kSCErr_Failed; // shouldn't happen..
 436                 throw err;
 437         }
 438
 439         HiddenWorld* hw = inWorld->hw;
 440         int id = hw->mHiddenID = (hw->mHiddenID - 8) | 0x80000000;
 441         inGraph->mNode.mID = id;
 442         inGraph->mNode.mHash = Hash(id);
 443     if (!World_AddNode(inWorld, &inGraph->mNode)) {
 444                 scprintf("mysterious failure in Graph_RemoveID\n");
 445                 Node_Delete(&inGraph->mNode);
 446                 // enums are uncatchable. must throw an int.
 447                 int err = kSCErr_Failed; // shouldn't happen..
 448                 throw err;
 449     }
 450
 451         //inWorld->hw->mRecentID = id;
 452 }
 453
 454 void Graph_FirstCalc(Graph *inGraph)
 455 {
 456         //scprintf("->Graph_FirstCalc\n");
 457         int numUnits = inGraph->mNumUnits;
 458         Unit **units = inGraph->mUnits;
 459         for (int i=0; i<numUnits; ++i) {
 460                 Unit *unit = units[i];
 461                 // call constructor
 462                 (*unit->mUnitDef->mUnitCtorFunc)(unit);
 463         }
 464         //scprintf("<-Graph_FirstCalc\n");
 465
 466         inGraph->mNode.mCalcFunc = (NodeCalcFunc)&Graph_Calc;
 467         // now do actual graph calculation
 468         Graph_Calc(inGraph);
 469 }
 470
 471 void Node_NullCalc(struct Node* /*inNode*/);
 472
 473 void Graph_NullFirstCalc(Graph *inGraph)
 474 {
 475         //scprintf("->Graph_FirstCalc\n");
 476         int numUnits = inGraph->mNumUnits;
 477         Unit **units = inGraph->mUnits;
 478         for (int i=0; i<numUnits; ++i) {
 479                 Unit *unit = units[i];
 480                 // call constructor
 481                 (*unit->mUnitDef->mUnitCtorFunc)(unit);
 482         }
 483         //scprintf("<-Graph_FirstCalc\n");
 484
 485         inGraph->mNode.mCalcFunc = &Node_NullCalc;
 486 }
 487
 488 inline void Graph_Calc_unit(Unit * unit)
 489 {
 490         (unit->mCalcFunc)(unit, unit->mBufLength);
 491 }
 492
 493 void Graph_Calc(Graph *inGraph)
 494 {
 495         //scprintf("->Graph_Calc\n");
 496         int numCalcUnits = inGraph->mNumCalcUnits;
 497         Unit **calcUnits = inGraph->mCalcUnits;
 498
 499         int unroll8 = numCalcUnits / 8;
 500         int remain8 = numCalcUnits % 8;
 501         int i = 0;
 502
 503         for (int j = 0; j!=unroll8; i += 8, ++j) {
 504                 Graph_Calc_unit(calcUnits[i]);
 505                 Graph_Calc_unit(calcUnits[i+1]);
 506                 Graph_Calc_unit(calcUnits[i+2]);
 507                 Graph_Calc_unit(calcUnits[i+3]);
 508                 Graph_Calc_unit(calcUnits[i+4]);
 509                 Graph_Calc_unit(calcUnits[i+5]);
 510                 Graph_Calc_unit(calcUnits[i+6]);
 511                 Graph_Calc_unit(calcUnits[i+7]);
 512         }
 513
 514         int unroll4 = remain8 / 4;
 515         int remain4 = remain8 % 4;
 516         if (unroll4) {
 517                 Graph_Calc_unit(calcUnits[i]);
 518                 Graph_Calc_unit(calcUnits[i+1]);
 519                 Graph_Calc_unit(calcUnits[i+2]);
 520                 Graph_Calc_unit(calcUnits[i+3]);
 521                 i+=4;
 522         }
 523
 524         int unroll2 = remain4 / 2;
 525         int remain2 = remain4 % 2;
 526         if (unroll2) {
 527                 Graph_Calc_unit(calcUnits[i]);
 528                 Graph_Calc_unit(calcUnits[i+1]);
 529                 i += 2;
 530         }
 531
 532         if (remain2)
 533                 Graph_Calc_unit(calcUnits[i]);
 534
 535         //scprintf("<-Graph_Calc\n");
 536 }
 537
 538 void Graph_CalcTrace(Graph *inGraph);
 539 void Graph_CalcTrace(Graph *inGraph)
 540 {
 541         int numCalcUnits = inGraph->mNumCalcUnits;
 542         Unit **calcUnits = inGraph->mCalcUnits;
 543         scprintf("\nTRACE %d  %s    #units: %d\n", inGraph->mNode.mID, inGraph->mNode.mDef->mName, numCalcUnits);
 544         for (int i=0; i<numCalcUnits; ++i) {
 545                 Unit *unit = calcUnits[i];
 546                 scprintf("  unit %d %s\n    in ", i, (char*)unit->mUnitDef->mUnitDefName);
 547                 for (int j=0; j<unit->mNumInputs; ++j) {
 548                         scprintf(" %g", ZIN0(j));
 549                 }
 550                 scprintf("\n");
 551                 (unit->mCalcFunc)(unit, unit->mBufLength);
 552                 scprintf("    out");
 553                 for (int j=0; j<unit->mNumOutputs; ++j) {
 554                         scprintf(" %g", ZOUT0(j));
 555                 }
 556                 scprintf("\n");
 557         }
 558         inGraph->mNode.mCalcFunc = (NodeCalcFunc)&Graph_Calc;
 559 }
 560
 561 void Graph_Trace(Graph *inGraph)
 562 {
 563         if (inGraph->mNode.mCalcFunc == (NodeCalcFunc)&Graph_Calc) {
 564                 inGraph->mNode.mCalcFunc = (NodeCalcFunc)&Graph_CalcTrace;
 565         }
 566 }
 567
 568
 569 int Graph_GetControl(Graph* inGraph, uint32 inIndex, float& outValue)
 570 {
 571         if (inIndex >= GRAPHDEF(inGraph)->mNumControls) return kSCErr_IndexOutOfRange;
 572         outValue = inGraph->mControls[inIndex];
 573         return kSCErr_None;
 574 }
 575
 576 int Graph_GetControl(Graph* inGraph, int32 inHash, int32 *inName, uint32 inIndex, float& outValue)
 577 {
 578         ParamSpecTable* table = GRAPH_PARAM_TABLE(inGraph);
 579         ParamSpec *spec = table->Get(inHash, inName);
 580         if (!spec) return kSCErr_IndexOutOfRange;
 581         return Graph_GetControl(inGraph, spec->mIndex + inIndex, outValue);
 582 }
 583
 584 void Graph_SetControl(Graph* inGraph, uint32 inIndex, float inValue)
 585 {
 586         if (inIndex >= GRAPHDEF(inGraph)->mNumControls) return;
 587         inGraph->mControlRates[inIndex] = 0;
 588         float *ptr = inGraph->mControls + inIndex;
 589         inGraph->mMapControls[inIndex] = ptr; // unmap the control
 590         *ptr = inValue;
 591 }
 592
 593 void Graph_SetControl(Graph* inGraph, int32 inHash, int32 *inName, uint32 inIndex, float inValue)
 594 {
 595         ParamSpecTable* table = GRAPH_PARAM_TABLE(inGraph);
 596         ParamSpec *spec = table->Get(inHash, inName);
 597         if (spec) Graph_SetControl(inGraph, spec->mIndex + inIndex, inValue);
 598 }
 599
 600
 601
 602 void Graph_MapControl(Graph* inGraph, int32 inHash, int32 *inName, uint32 inIndex, uint32 inBus)
 603 {
 604         ParamSpecTable* table = GRAPH_PARAM_TABLE(inGraph);
 605         ParamSpec *spec = table->Get(inHash, inName);
 606         if (spec) Graph_MapControl(inGraph, spec->mIndex + inIndex, inBus);
 607 }
 608
 609 void Graph_MapControl(Graph* inGraph, uint32 inIndex, uint32 inBus)
 610 {
 611         if (inIndex >= GRAPHDEF(inGraph)->mNumControls) return;
 612         World *world = inGraph->mNode.mWorld;
 613         if (inBus >= 0x80000000) {
 614                 inGraph->mControlRates[inIndex] = 0;
 615                 inGraph->mMapControls[inIndex] = inGraph->mControls + inIndex;
 616         } else if (inBus < world->mNumControlBusChannels) {
 617                 inGraph->mControlRates[inIndex] = 1;
 618                 inGraph->mMapControls[inIndex] = world->mControlBus + inBus;
 619         }
 620 }
 621
 622 void Graph_MapAudioControl(Graph* inGraph, int32 inHash, int32 *inName, uint32 inIndex, uint32 inBus)
 623 {
 624     ParamSpecTable* table = GRAPH_PARAM_TABLE(inGraph);
 625     ParamSpec *spec = table->Get(inHash, inName);
 626     if (spec) Graph_MapAudioControl(inGraph, spec->mIndex + inIndex, inBus);
 627 }
 628
 629 void Graph_MapAudioControl(Graph* inGraph, uint32 inIndex, uint32 inBus)
 630 {
 631     if (inIndex >= GRAPHDEF(inGraph)->mNumControls) return;
 632     World *world = inGraph->mNode.mWorld;
 633 //    inGraph->mControlRates[inIndex] = 2;
 634     /* what is the below doing??? it is unmapping by looking for negative ints */
 635     if (inBus >= 0x80000000) {
 636         inGraph->mControlRates[inIndex] = 0;
 637         inGraph->mMapControls[inIndex] = inGraph->mControls + inIndex;
 638         } else if (inBus < world->mNumAudioBusChannels) {
 639         inGraph->mControlRates[inIndex] = 2;
 640         inGraph->mMapControls[inIndex] = world->mAudioBus + (inBus * world->mBufLength);
 641     }
 642 }