/* commands a scsi cdrom device to play audio. Probably NetBSD specific.
 * --
 * usage: cdplay [-s startingtrack] [-e endtrack] [-d device] [-i]
 * Defaults to playing the entire disc in cd0. Plays a single track if just
 * the starting track specified, otherwise plays all tracks in range s to e.
 * "-i" reports the number of tracks on the disc.
 * --
 * [$Id]
 * Chris Baird,, <cjb@brushtail.apana.org.au> Released to the public domain.
 */

#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/cdio.h>
#include <err.h>
#include <stdio.h>
#include <unistd.h>

extern int errno;
extern const char *const sys_errlist[];
extern char *optarg;
extern int optind;

main(int argc, char* argv[])
{
    struct ioc_play_track cmd;
    struct ioc_toc_header tocheader;
    struct ioc_vol volume[4];
    char cddev[32] = "/dev/cd0a";
    int s=0, e=0, v=255, i=0, c;
    FILE* d;

    while ((c = getopt(argc, argv, "iv:s:e:d:")) != -1)
	switch(c) {
	case 'i':
	    i = 1;
	    break;
	case 'v':
	    v = atoi(optarg);
	    break;
	case 's':
	    s = atoi(optarg);
	    break;
	case 'e':
	    e = atoi(optarg);
	    break;
	case 'd':
	    strncpy (cddev+5, optarg, 26);
	    break;
	}

    if ((d = fopen(cddev, "r")) == NULL)
	err(1, NULL);

    if ((ioctl (d->_file, CDIOREADTOCHEADER, &tocheader)) == -1)
	err(1, NULL);

    if (i != 0)
    {
	fprintf (stderr, "start_track=%d, end_track=%d, len=%d\n",
		 tocheader.starting_track, tocheader.ending_track, tocheader.len);
	exit(0);
    }

    cmd.start_index = 1;
    cmd.end_index = 1;
    cmd.start_track = tocheader.starting_track;
    cmd.end_track = tocheader.ending_track;

    if (s != 0)
	if ((s < tocheader.starting_track) || (s > tocheader.ending_track))
	    errx (1, "bad starting track %d", s);
	else
	{
	    cmd.start_track = s;
	    cmd.end_track = s;
	}

    if (e != 0)
	if ((e < tocheader.starting_track) || (e > tocheader.ending_track) || (e < s))
	    errx (1, "bad ending track %d", e);
	else
	    cmd.end_track = e;

    if ((v >= 0) && (v <= 255))
    {
	volume->vol[0] = volume->vol[1] = volume->vol[2] = volume->vol[3] = v;
	ioctl (d->_file, CDIOCSETVOL, &volume);
    }

    if ((ioctl (d->_file, CDIOCPLAYTRACKS, &cmd)) == -1)
	err (1, NULL);

    fclose (d);
}