//
// Programmer:    Craig Stuart Sapp <craig@ccrma.stanford.edu>
// Creation Date: Mon Dec 21 18:00:42 PST 1998
// Last Modified: Mon Dec 21 18:00:42 PST 1998
// Filename:      ...linuxmidi/output/method1.c
// Syntax:        C 
// $Smake:        gcc -O -o %b %f && strip %b
//
// Description:   This program sends out a single MIDI note (middle C)
//		  and then exits.  The MIDI driver usually turns the
//                note off automatically when the program is exited.
//

#include <linux/soundcard.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>

int main(void) {
   char* device = "/dev/sequencer";
   unsigned char devnum = 0;
   unsigned char packet[4] = {SEQ_MIDIPUTC, 0, devnum, 0};


   // step 1: open the OSS device for writing
   int fd = open(device, O_WRONLY);
   if (fd < 0) {
      printf("Error: cannot open %s\n", device);
      exit(1);
   }
			

   // step 2: write the note-on message to MIDI output
   packet[1] = 0x90;                        // note-on MIDI command
   write(fd, packet, sizeof(packet));
   packet[1] = 60;                          // kenumber: 60 = middle c
   write(fd, packet, sizeof(packet));
   packet[1] = 127;                         // attack velocity: 127 = loud
   write(fd, packet, sizeof(packet));   


   // step 3: (optional) close the device
   close(fd);


   return 0;
}