cdcontrol.c revision 13823 
1/*
2 * Compact Disc Control Utility by Serge V. Vakulenko, <vak@cronyx.ru>.
3 * Based on the non-X based CD player by Jean-Marc Zucconi and
4 * Andrew A. Chernov.
5 */
6#include <stdio.h>
7#include <stdlib.h>
8#include <string.h>
9#include <unistd.h>
10#include <errno.h>
11#include <sys/file.h>
12#include <sys/cdio.h>
13#include <sys/ioctl.h>
14
15#define VERSION "1.0"
16
17/*
18 * Audio Status Codes
19 */
20#define ASTS_INVALID    0x00    /* Audio status byte not valid */
21#define ASTS_PLAYING    0x11    /* Audio play operation in progress */
22#define ASTS_PAUSED     0x12    /* Audio play operation paused */
23#define ASTS_COMPLETED  0x13    /* Audio play operation successfully completed */
24#define ASTS_ERROR      0x14    /* Audio play operation stopped due to error */
25#define ASTS_VOID       0x15    /* No current audio status to return */
26
27struct cmdtab {
28	int command;
29	char *name;
30	char *args;
31} cmdtab[] = {
32#define CMD_DEBUG       1
33	{ CMD_DEBUG,    "Debug",        "[ on | off | reset ]", },
34#define CMD_EJECT       2
35	{ CMD_EJECT,    "Eject",        "", },
36#define CMD_HELP        3
37	{ CMD_HELP,     "?",            0, },
38	{ CMD_HELP,     "Help",         "", },
39#define CMD_INFO        4
40	{ CMD_INFO,     "Info",         "", },
41#define CMD_PAUSE       5
42	{ CMD_PAUSE,    "PAuse",        "", },
43#define CMD_PLAY        6
44	{ CMD_PLAY,     "P",            0, },
45	{ CMD_PLAY,     "Play",         "min1:sec1.fr1 [ min2:sec2.fr2 ]", },
46	{ CMD_PLAY,     "Play",         "track1.index1 [ track2.index2 ]", },
47	{ CMD_PLAY,     "Play",         "#block [ len ]", },
48#define CMD_QUIT        7
49	{ CMD_QUIT,     "Quit",         "", },
50#define CMD_RESUME      8
51	{ CMD_RESUME,   "Resume",       "", },
52#define CMD_STOP        9
53	{ CMD_STOP,     "Stop",         "", },
54#define CMD_VOLUME      10
55	{ CMD_VOLUME,   "Volume",       "<l> <r> | left | right | mute | mono | stereo", },
56	{ 0,            0, },
57};
58
59struct cd_toc_entry toc_buffer[100];
60
61char *cdname;
62int fd = -1;
63int verbose = 1;
64
65extern char *optarg;
66extern int optind;
67
68int setvol (int, int);
69int read_toc_entrys (int);
70int play_msf (int, int, int, int, int, int);
71int play_track (int, int, int, int);
72int get_vol (int *, int *);
73int status (int *, int *, int *, int *);
74int open_cd (void);
75int play (char *arg);
76int info (char *arg);
77char *input (int*);
78void prtrack (struct cd_toc_entry *e, int lastflag);
79void lba2msf (int lba, u_char *m, u_char *s, u_char *f);
80int msf2lba (u_char m, u_char s, u_char f);
81int play_blocks (int blk, int len);
82int run (int cmd, char *arg);
83char *parse (char *buf, int *cmd);
84
85extern int errno;
86
87void help ()
88{
89	struct cmdtab *c;
90
91	for (c=cmdtab; c->name; ++c) {
92		if (! c->args)
93			continue;
94		printf ("\t%s", c->name);
95		if (*c->args)
96			printf (" %s", c->args);
97		printf ("\n");
98	}
99}
100
101void usage ()
102{
103	printf ("Usage:\n\tcdcontrol [ -vs ] [ -f disc ] [ command args... ]\n");
104	printf ("Options:\n");
105	printf ("\t-v       - verbose mode\n");
106	printf ("\t-s       - silent mode\n");
107	printf ("\t-f disc  - device name such as /dev/cd0c\n");
108	printf ("\tDISC     - shell variable with device name\n");
109	printf ("Commands:\n");
110	help ();
111	exit (1);
112}
113
114int main (int argc, char **argv)
115{
116	int cmd;
117	char *arg;
118
119	cdname = getenv ("DISC");
120	if (! cdname)
121		cdname = getenv ("CDPLAY");
122
123	for (;;) {
124		switch (getopt (argc, argv, "svhf:")) {
125		case EOF:
126			break;
127		case 's':
128			verbose = 0;
129			continue;
130		case 'v':
131			verbose = 2;
132			continue;
133		case 'f':
134			cdname = optarg;
135			continue;
136		case 'h':
137		default:
138			usage ();
139		}
140		break;
141	}
142	argc -= optind;
143	argv += optind;
144
145	if (argc > 0 && strcasecmp (*argv, "help") == 0)
146		usage ();
147
148	if (! cdname) {
149		fprintf (stderr, "No CD device name specified.\n");
150		usage ();
151	}
152
153	if (argc > 0) {
154		char buf[80], *p;
155		int len;
156
157		for (p=buf; argc-- > 0; ++argv) {
158			len = strlen (*argv);
159			if (p + len >= buf + sizeof (buf) - 1)
160				usage ();
161			if (p > buf)
162				*p++ = ' ';
163			strcpy (p, *argv);
164			p += len;
165		}
166		*p = 0;
167		arg = parse (buf, &cmd);
168		return run (cmd, arg);
169	}
170
171	if (verbose == 1)
172		verbose = isatty (0);
173	if (verbose) {
174		printf ("Compact Disc Control Utility, Version %s\n", VERSION);
175		printf ("Type `?' for command list\n\n");
176	}
177
178	for (;;) {
179		arg = input (&cmd);
180		if (run (cmd, arg) < 0) {
181			if (verbose)
182				perror ("cdplay");
183			close (fd);
184			fd = -1;
185		}
186		fflush (stdout);
187	}
188}
189
190int run (int cmd, char *arg)
191{
192	int l, r, rc;
193
194	switch (cmd) {
195	case CMD_QUIT:
196		exit (0);
197
198	default:
199	case CMD_HELP:
200		help ();
201		return (0);
202
203	case CMD_INFO:
204		if (fd<0 && ! open_cd ()) return (0);
205		return info (arg);
206
207	case CMD_PAUSE:
208		if (fd<0 && ! open_cd ()) return (0);
209		return ioctl (fd, CDIOCPAUSE);
210
211	case CMD_RESUME:
212		if (fd<0 && ! open_cd ()) return (0);
213		return ioctl (fd, CDIOCRESUME);
214
215	case CMD_STOP:
216		if (fd<0 && ! open_cd ()) return (0);
217		return ioctl (fd, CDIOCSTOP);
218
219	case CMD_DEBUG:
220		if (fd<0 && ! open_cd ()) return (0);
221		if (strcasecmp (arg, "on") == 0)
222			return ioctl (fd, CDIOCSETDEBUG);
223		if (strcasecmp (arg, "off") == 0)
224			return ioctl (fd, CDIOCCLRDEBUG);
225		if (strcasecmp (arg, "reset") == 0)
226			return ioctl (fd, CDIOCRESET);
227		printf ("Invalid command arguments\n");
228		return (0);
229
230	case CMD_EJECT:
231		if (fd<0 && ! open_cd ()) return (0);
232		(void) ioctl (fd, CDIOCALLOW);
233		rc = ioctl (fd, CDIOCEJECT);
234		if (rc < 0)
235			return (rc);
236		close (fd);
237		fd = -1;
238		return (0);
239
240	case CMD_PLAY:
241		if (fd<0 && ! open_cd ()) return (0);
242		return play (arg);
243
244	case CMD_VOLUME:
245		if (fd<0 && ! open_cd ()) return (0);
246
247		if (strcasecmp (arg, "left") == 0)
248			return ioctl (fd, CDIOCSETLEFT);
249		else if (strcasecmp (arg, "right") == 0)
250			return ioctl (fd, CDIOCSETRIGHT);
251		else if (strcasecmp (arg, "mute") == 0)
252			return ioctl (fd, CDIOCSETMUTE);
253		else if (strcasecmp (arg, "mono") == 0)
254			return ioctl (fd, CDIOCSETMONO);
255		else if (strcasecmp (arg, "stereo") == 0)
256			return ioctl (fd, CDIOCSETSTERIO);
257
258		if (2 != sscanf (arg, "%d %d", &l, &r)) {
259			printf ("Invalid command arguments\n");
260			return (0);
261		}
262		return setvol (l, r);
263	}
264}
265
266int play (char *arg)
267{
268	struct ioc_toc_header h;
269	int rc, n, start, end = 0, istart = 1, iend = 1;
270
271	rc = ioctl (fd, CDIOREADTOCHEADER, &h);
272	if (rc < 0)
273		return (rc);
274
275	n = h.ending_track - h.starting_track + 1;
276	rc = read_toc_entrys ((n + 1) * sizeof (struct cd_toc_entry));
277	if (rc < 0)
278		return (rc);
279
280	if (! *arg)
281		/*
282		 * Play the whole disc
283		 */
284		return play_blocks (0, msf2lba (toc_buffer[n].addr.msf.minute,
285			toc_buffer[n].addr.msf.second,
286			toc_buffer[n].addr.msf.frame));
287
288	if (strchr (arg, '#')) {
289		/*
290		 * Play block #blk [ len ]
291		 */
292		int blk, len = 0;
293
294		if (2 != sscanf (arg, "#%d%d", &blk, &len) &&
295		    1 != sscanf (arg, "#%d", &blk)) {
296err:                    printf ("Invalid command arguments\n");
297			return (0);
298		}
299		if (len == 0)
300			len = msf2lba (toc_buffer[n].addr.msf.minute,
301				toc_buffer[n].addr.msf.second,
302				toc_buffer[n].addr.msf.frame) - blk;
303		return play_blocks (blk, len);
304	}
305
306	if (strchr (arg, ':')) {
307		/*
308		 * Play MSF m1:s1 [ .f1 ] [ m2:s2 [ .f2 ] ]
309		 */
310		int m1, m2 = 0, s1, s2 = 0, f1 = 0, f2 = 0;
311
312		if (6 != sscanf (arg, "%d:%d.%d%d:%d.%d", &m1, &s1, &f1, &m2, &s2, &f2) &&
313		    5 != sscanf (arg, "%d:%d.%d%d:%d", &m1, &s1, &f1, &m2, &s2) &&
314		    5 != sscanf (arg, "%d:%d%d:%d.%d", &m1, &s1, &m2, &s2, &f2) &&
315		    3 != sscanf (arg, "%d:%d.%d", &m1, &s1, &f1) &&
316		    4 != sscanf (arg, "%d:%d%d:%d", &m1, &s1, &m2, &s2) &&
317		    2 != sscanf (arg, "%d:%d", &m1, &s1))
318			goto err;
319		if (m2 == 0) {
320			m2 = toc_buffer[n].addr.msf.minute;
321			s2 = toc_buffer[n].addr.msf.second;
322			f2 = toc_buffer[n].addr.msf.frame;
323		}
324		return play_msf (m1, s1, f1, m2, s2, f2);
325	}
326
327	/*
328	 * Play track trk1 [ .idx1 ] [ trk2 [ .idx2 ] ]
329	 */
330	if (4 != sscanf (arg, "%d.%d%d.%d", &start, &istart, &end, &iend) &&
331	    3 != sscanf (arg, "%d.%d%d", &start, &istart, &end) &&
332	    3 != sscanf (arg, "%d%d.%d", &start, &end, &iend) &&
333	    2 != sscanf (arg, "%d.%d", &start, &istart) &&
334	    2 != sscanf (arg, "%d%d", &start, &end) &&
335	    1 != sscanf (arg, "%d", &start))
336		goto err;
337	if (end == 0)
338		end = n;
339	return play_track (start, istart, end, iend);
340}
341
342char *strstatus (int sts)
343{
344	switch (sts) {
345	case ASTS_INVALID:   return ("invalid");
346	case ASTS_PLAYING:   return ("playing");
347	case ASTS_PAUSED:    return ("paused");
348	case ASTS_COMPLETED: return ("completed");
349	case ASTS_ERROR:     return ("error");
350	case ASTS_VOID:      return ("void");
351	default:             return ("??");
352	}
353}
354
355int info (char *arg)
356{
357	struct ioc_toc_header h;
358	struct ioc_vol v;
359	int rc, i, n, trk, m, s, f;
360
361	rc = status (&trk, &m, &s, &f);
362	if (rc >= 0)
363		if (verbose)
364			printf ("Audio status = %d<%s>, current track = %d, current position = %d:%02d.%02d\n",
365				rc, strstatus (rc), trk, m, s, f);
366		else
367			printf ("%d %d %d:%02d.%02d\n", rc, trk, m, s, f);
368	else
369		printf ("No current status info\n");
370
371	rc = ioctl (fd, CDIOCGETVOL, &v);
372	if (rc >= 0)
373		if (verbose)
374			printf ("Left volume = %d, right volume = %d\n",
375				v.vol[0], v.vol[1]);
376		else
377			printf ("%d %d\n", v.vol[0], v.vol[1]);
378	else
379		printf ("No volume info\n");
380
381	rc = ioctl (fd, CDIOREADTOCHEADER, &h);
382	if (rc >= 0)
383		if (verbose)
384			printf ("Starting track = %d, ending track = %d, TOC size = %d bytes\n",
385				h.starting_track, h.ending_track, h.len);
386		else
387			printf ("%d %d %d\n", h.starting_track,
388				h.ending_track, h.len);
389	else {
390		perror ("getting toc header");
391		return (rc);
392	}
393
394	n = h.ending_track - h.starting_track + 1;
395	rc = read_toc_entrys ((n + 1) * sizeof (struct cd_toc_entry));
396	if (rc < 0)
397		return (rc);
398	if (verbose) {
399		printf ("track     start  duration   block  length   type\n");
400		printf ("-------------------------------------------------\n");
401	}
402	for (i = 0; i < n; i++) {
403		printf ("%5d  ", toc_buffer[i].track);
404		prtrack (toc_buffer + i, 0);
405	}
406	printf ("  end  ");
407	prtrack (toc_buffer + n, 1);
408	return (0);
409}
410
411void lba2msf (int lba, u_char *m, u_char *s, u_char *f)
412{
413	lba += 150;             /* block start offset */
414	lba &= 0xffffff;        /* negative lbas use only 24 bits */
415	*m = lba / (60 * 75);
416	lba %= (60 * 75);
417	*s = lba / 75;
418	*f = lba % 75;
419}
420
421int msf2lba (u_char m, u_char s, u_char f)
422{
423	return (((m * 60) + s) * 75 + f) - 150;
424}
425
426void prtrack (struct cd_toc_entry *e, int lastflag)
427{
428	int block, next, len;
429	u_char m, s, f;
430
431	/* Print track start */
432	printf ("%2d:%02d.%02d  ", e->addr.msf.minute,
433		e->addr.msf.second, e->addr.msf.frame);
434
435	block = msf2lba (e->addr.msf.minute, e->addr.msf.second,
436		e->addr.msf.frame);
437	if (lastflag) {
438		/* Last track -- print block */
439		printf ("       -  %6d       -      -\n", block);
440		return;
441	}
442
443	next = msf2lba (e[1].addr.msf.minute, e[1].addr.msf.second,
444		e[1].addr.msf.frame);
445	len = next - block;
446	lba2msf (len, &m, &s, &f);
447
448	/* Print duration, block, length, type */
449	printf ("%2d:%02d.%02d  %6d  %6d  %5s\n", m, s, f, block, len,
450		e->addr_type & 4 ? "data" : "audio");
451}
452
453int play_track (int tstart, int istart, int tend, int iend)
454{
455	struct ioc_play_track t;
456
457	t.start_track = tstart;
458	t.start_index = istart;
459	t.end_track = tend;
460	t.end_index = iend;
461	return ioctl (fd, CDIOCPLAYTRACKS, &t);
462}
463
464int play_blocks (int blk, int len)
465{
466	struct ioc_play_blocks t;
467
468	t.blk = blk;
469	t.len = len;
470	return ioctl (fd, CDIOCPLAYBLOCKS, &t);
471}
472
473int setvol (int l, int r)
474{
475	struct ioc_vol v;
476
477	v.vol[0] = l;
478	v.vol[1] = r;
479	v.vol[2] = 0;
480	v.vol[3] = 0;
481	return ioctl (fd, CDIOCSETVOL, &v);
482}
483
484int read_toc_entrys (int len)
485{
486	struct ioc_read_toc_entry t;
487
488	t.address_format = CD_MSF_FORMAT;
489	t.starting_track = 0;
490	t.data_len = len;
491	t.data = toc_buffer;
492	return ioctl (fd, CDIOREADTOCENTRYS, (char *) &t);
493}
494
495int play_msf (int start_m, int start_s, int start_f,
496     int end_m, int end_s, int end_f)
497{
498	struct ioc_play_msf a;
499
500	a.start_m = start_m;
501	a.start_s = start_s;
502	a.start_f = start_f;
503	a.end_m = end_m;
504	a.end_s = end_s;
505	a.end_f = end_f;
506	return ioctl (fd, CDIOCPLAYMSF, (char *) &a);
507}
508
509int status (int *trk, int *min, int *sec, int *frame)
510{
511	struct ioc_read_subchannel s;
512	struct cd_sub_channel_info data;
513
514	bzero (&s, sizeof (s));
515	s.data = &data;
516	s.data_len = sizeof (data);
517	s.address_format = CD_MSF_FORMAT;
518	s.data_format = CD_CURRENT_POSITION;
519	if (ioctl (fd, CDIOCREADSUBCHANNEL, (char *) &s) < 0)
520		return -1;
521	*trk = s.data->what.position.track_number;
522	*min = s.data->what.position.reladdr.msf.minute;
523	*sec = s.data->what.position.reladdr.msf.second;
524	*frame = s.data->what.position.reladdr.msf.frame;
525	return s.data->header.audio_status;
526}
527
528char *input (int *cmd)
529{
530	static char buf[80];
531	char *p;
532
533	do {
534		if (verbose)
535			fprintf (stderr, "cd> ");
536		if (! fgets (buf, sizeof (buf), stdin)) {
537			*cmd = CMD_QUIT;
538			return 0;
539		}
540		p = parse (buf, cmd);
541	} while (! p);
542	return (p);
543}
544
545char *parse (char *buf, int *cmd)
546{
547	struct cmdtab *c;
548	char *p;
549	int len;
550
551	for (p=buf; *p; ++p)
552		if (*p == '\t')
553			*p = ' ';
554		else if (*p == '\n')
555			*p = 0;
556
557	for (p=buf; *p; ++p)
558		if (*p == ' ') {
559			*p++ = 0;
560			break;
561		}
562	while (*p == ' ')
563		++p;
564
565	len = strlen (buf);
566	if (! len)
567		return (0);
568	*cmd = -1;
569	for (c=cmdtab; c->name; ++c) {
570		/* Try short command form. */
571		if (! c->args && len == strlen (c->name) &&
572		    strncasecmp (buf, c->name, len) == 0) {
573			*cmd = c->command;
574			break;
575		}
576
577		/* Try long form. */
578		if (strncasecmp (buf, c->name, len) != 0)
579			continue;
580
581		/* Check inambiguity. */
582		if (*cmd != -1) {
583			fprintf (stderr, "Ambiguous command\n");
584			return (0);
585		}
586		*cmd = c->command;
587	}
588	if (*cmd == -1) {
589		fprintf (stderr, "Invalid command, enter ``help'' for command list\n");
590		return (0);
591	}
592	return p;
593}
594
595int open_cd ()
596{
597	char devbuf[80];
598
599	if (fd > -1)
600		return (1);
601	if (*cdname == '/')
602		strcpy (devbuf, cdname);
603	else if (*cdname == 'r')
604		sprintf (devbuf, "/dev/%s", cdname);
605	else
606		sprintf (devbuf, "/dev/r%s", cdname);
607	fd = open (devbuf, O_RDONLY);
608	if (fd < 0 && errno == ENOENT) {
609		strcat (devbuf, "c");
610		fd = open (devbuf, O_RDONLY);
611	}
612	if (fd < 0) {
613		if (errno != ENXIO) {
614			perror (devbuf);
615			exit (1);
616		}
617		/* open says 'Device not configured' if no cd in */
618		fprintf (stderr, "open: No CD in\n");
619		return (0);
620	}
621	return (1);
622}
623