/*
 *  Program: SDK_EX1.C
 *   Author: Philip VanBaren
 *  Purpose: This program demonstrates how to use the Media Vision SDK routines
 *           to do output a single block of data.
 */

#include <math.h>
#include <stdio.h>
#include <conio.h>

#include <pcmio.h>

extern int DMARunning;     /* SDK flag that indicates when DMA has been started */

#define IRQ -1             /* -1 means use the default value */
#define DMA -1             /* -1 means use the default value */
#define DMASize 16         /* 16k DMA buffer */
#define DMADivisions 4     /* 4 divisions in this buffer */

#define SamplingRate 22050
#define StereoFlag 0       /* If this flag is 1, data is interleaved left/right */
#define CompressionFlag 0
#define SampleSize 16      /* Size of samples, 8 or 16 bits */

#define BUF_LEN 20000

int out_buf[BUF_LEN];

void main(void)
{
   /*
    *  Put some meaningful information in out_buf here
    */
   int i;
   for(i=0;i<BUF_LEN;i++)
      out_buf[i]=floor(20000*sin(2*M_PI*0.1*i));

   /*
    *  Initialize ProAudio stuff
    */
   if(OpenPCMBuffering(DMA,IRQ,DMASize,DMADivisions)!=0)
      puts("Error trying to open PCM buffering.");
   else if(PCMState(SamplingRate,StereoFlag,CompressionFlag,SampleSize)!=0)
      puts("Error setting sample rate.");
   else
   {
      if(PlayThisBlock((char *)out_buf,(long)BUF_LEN*2,NULL)!=0)
      {
         ClosePCMBuffering();
         puts("Error playing block.");
      }
      else
      {
         /*
          *  Wait for the DMA to end (which means playback is complete).
          */
         while(!kbhit() && DMARunning);
      }
   }
   /*
    *  You MUST call this function before ending the program, else things won't
    *  work right the next time you try to run the program.  This is critical to
    *  remember when debugging the program, because in debugging you often quit the
    *  program before it runs to completion.  The only way I know of to recover
    *  if this function is NOT called is to reboot the computer!
    */
   ClosePCMBuffering();
}