example9.c

/*
  Copyright (C) 2024 Victor Lazzarini

  API Examples: accessing function tables
  
  This file is part of Csound.

  The Csound Library is free software; you can redistribute it
  and/or modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  Csound 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 Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with Csound; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  02111-1307 USA

*/

#if defined(__APPLE__)
#include <CsoundLib64/csound.h>
#else
#include <csound/csound.h>
#endif

const char *code =    
  "0dbfs = 1              \n" 
  "instr 1                \n"
  "k1 oscil 1,0.7,1       \n"
  "a1 linen p4,0.1,p3,0.1 \n"
  "a2 oscil a1,cpsmidinn(p5+k1)\n"
  "    out a2             \n"
  "endin                  \n"
  "ifn ftgen 1,0,8,7,0,8,0\n"
  "schedule 1,0,5,0.5,60\n"
  "event_i \"e\", 5\n";

int main(int argc, const char *argv[]) {
  /* Create the Csound engine instance */
  CSOUND *csound = csoundCreate(NULL, NULL);

  if(csound != NULL) {
    int res = CSOUND_SUCCESS, i;
    /* Set options checking for any errors */
    for(i = 1; i < argc; i++)
      res += csoundSetOption(csound, argv[i]);
    if(res == CSOUND_SUCCESS) {
      /* Compile code from string, synchronously */
      res = csoundCompileOrc(csound, code, 0);
      if(res == CSOUND_SUCCESS) {
        MYFLT *ftab;
        int tlen;
        /* Start engine */
        res = csoundStart(csound);
        if(res == CSOUND_SUCCESS) {
          /* get table and fill it */
          tlen = csoundGetTable(csound, &ftab, 1);
          for(i = 0; i < tlen; i++)
            ftab[i] = (MYFLT) i;
          /* compute audio blocks */
          while(res == CSOUND_SUCCESS) 
            res = csoundPerformKsmps(csound);
        }
      }
    }
    /* Destroy the engine instance */
    csoundDestroy(csound);
    return 0;
  }
  return -1;
}