Version 3.2

projects/examples/sineN.cpp

@@ -0,0 +1,79 @@
+/******************************************/
+/*
+  Example program to write N sine tones to
+  an N channel soundfile
+  by Gary P. Scavone, 2000
+
+  This program is currently written to write
+  an N channel WAV file.  However, it is
+  simple to replace the instance of WavWvOut
+  with any other WvOut subclass.
+*/
+/******************************************/
+
+#include "WavWvOut.h"
+#include "RawWvIn.h"
+
+void usage(void) {
+  /* Error function in case of incorrect command-line
+     argument specifications
+  */
+  printf("\nuseage: sineN N file time \n");
+  printf("    where N = number of channels (sines),\n");
+  printf("    file = the .wav file to create,\n");
+  printf("    and time = the amount of time to record (in seconds).\n\n");
+  exit(0);
+}
+
+int
+main(int argc, char *argv[])
+{
+  // minimal command-line checking
+  if (argc != 4) usage();
+
+  int chans = (int) atoi(argv[1]);
+  float time = atof(argv[3]);
+  int i;
+
+  // Define and load the rawwave file(s) ... the path is critical
+  RawWvIn *oscs[chans];
+  try {
+    for (i=0; i<chans; i++)
+      oscs[i] = new RawWvIn("../../rawwaves/sinewave.raw", "looping");
+  }
+  catch (StkError& m) {
+    m.printMessage();
+    exit(0);
+  }
+  // Set oscillator frequency(ies) here ... somewhat random
+  float base_freq = 220.0;
+  for (i=0; i<chans; i++)
+    oscs[i]->setFreq(base_freq + i*(45.0));
+
+  // Define and open the soundfile for output
+  WvOut *output;
+  try {
+    output = new WavWvOut(argv[2],chans);
+  }
+  catch (StkError& m) {
+    m.printMessage();
+    exit(0);
+  }
+
+  // Here's the runtime loop
+  i=0;
+  int samples = (int) (time*SRATE);
+  MY_FLOAT *outvec = (MY_FLOAT *) new MY_FLOAT[chans];
+  while (i<samples) {
+    for (int j=0; j<chans; j++)
+      outvec[j] = oscs[j]->tick();
+    output->mtick(outvec);
+    i++;
+  }
+
+  // Clean up
+  for (i=0; i<chans; i++)
+    delete oscs[i];
+  delete [] outvec;
+  delete output;
+}