include/plugin_interface/SC_DemandUnit.h

   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 #ifndef _SC_DemandUnit_
  22 #define _SC_DemandUnit_
  23
  24 #include "SC_Unit.h"
  25 #include "SC_Wire.h"
  26
  27 // demand rate unit support.
  28
  29 inline bool IsDemandInput(Unit* unit, int index)
  30 {
  31         Unit* fromUnit = unit->mInput[index]->mFromUnit;
  32         return fromUnit && fromUnit->mCalcRate == calc_DemandRate;
  33 }
  34
  35 inline float DemandInput(Unit* unit, int index)
  36 {
  37         Unit* fromUnit = unit->mInput[index]->mFromUnit;
  38         if (fromUnit && fromUnit->mCalcRate == calc_DemandRate)
  39                 (fromUnit->mCalcFunc)(fromUnit, 1);
  40         return IN0(index);
  41 }
  42
  43 // support for audio rate input to demand UGens
  44 // offset comes in as inNumSamples, so is in the range 1..size ! inNumSamples = 0 has a special meaning (reset).
  45 // it is converted to a buffer index here.
  46
  47 inline float DemandInputA(Unit* unit, int index, int offset)
  48 {
  49         Unit* fromUnit = unit->mInput[index]->mFromUnit;
  50         if(!fromUnit) { return IN0(index); }
  51         if (fromUnit->mCalcRate == calc_DemandRate) {
  52                 (fromUnit->mCalcFunc)(fromUnit, offset);
  53                 return IN0(index);
  54         } else if (fromUnit->mCalcRate == calc_FullRate) {
  55                 return IN(index)[offset - 1];
  56         } else {
  57                 return IN0(index);
  58         }
  59 }
  60
  61 inline void ResetInput(Unit* unit, int index)
  62 {
  63         Unit* fromUnit = unit->mInput[index]->mFromUnit;
  64         if (fromUnit && fromUnit->mCalcRate == calc_DemandRate)
  65                 (fromUnit->mCalcFunc)(fromUnit, 0);
  66 }
  67
  68 #define ISDEMANDINPUT(index) IsDemandInput(unit, (index))
  69 #define DEMANDINPUT(index) DemandInput(unit, (index))
  70 #define DEMANDINPUT_A(index, offset) DemandInputA(unit, (index), (offset))
  71 #define RESETINPUT(index) ResetInput(unit, (index))
  72
  73 #endif