summaryrefslogtreecommitdiffstats
path: root/libmpdemux/cddb.c
blob: 01922770814e3484d60d6efd78129e24d9c66d83 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
/*
 * CDDB HTTP protocol 
 * by Bertrand Baudet <bertrand_baudet@yahoo.com>
 * (C) 2002, MPlayer team.
 *
 * Implementation follow the freedb.howto1.06.txt specification
 * from http://freedb.freedb.org
 * 
 * discid computation by Jeremy D. Zawodny
 *	 Copyright (c) 1998-2000 Jeremy D. Zawodny <Jeremy@Zawodny.com>
 *	 Code release under GPL
 *
 */

#include "config.h"

#if defined(HAVE_CDDA) && defined(MPLAYER_NETWORK)

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <stdarg.h>
#include <errno.h>
#include <netdb.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>

#if defined(__linux__)
	#include <linux/cdrom.h>
#elif defined(__FreeBSD__) || defined(__bsdi__) || defined(__NetBSD__) || defined(__OpenBSD__)
	#include <sys/cdio.h>
#endif

#include "cdd.h"
#include "../version.h"
#include "stream.h"
#include "network.h"

#define DEFAULT_FREEDB_SERVER	"freedb.freedb.org"
#define DEFAULT_CACHE_DIR	"/.cddb/"

stream_t* open_cdda(char *dev, char *track);

static cd_toc_t cdtoc[100];

#if defined(__linux__)
int 
read_toc(const char *dev) {
	int drive;
	struct cdrom_tochdr tochdr;
	struct cdrom_tocentry tocentry;
	int i;

	drive = open(dev, O_RDONLY | O_NONBLOCK);
	if( drive<0 ) {
		return drive;
	}
	
	ioctl(drive, CDROMREADTOCHDR, &tochdr);
	for (i = tochdr.cdth_trk0; i <= tochdr.cdth_trk1; i++) {
		tocentry.cdte_track = i;
		tocentry.cdte_format = CDROM_MSF;
		ioctl(drive, CDROMREADTOCENTRY, &tocentry);
		cdtoc[i-1].min = tocentry.cdte_addr.msf.minute;
		cdtoc[i-1].sec = tocentry.cdte_addr.msf.second;
		cdtoc[i-1].frame = tocentry.cdte_addr.msf.frame;
		cdtoc[i-1].frame += cdtoc[i-1].min*60*75;
		cdtoc[i-1].frame += cdtoc[i-1].sec*75;
	}
	tocentry.cdte_track = 0xAA;
	tocentry.cdte_format = CDROM_MSF;
	ioctl(drive, CDROMREADTOCENTRY, &tocentry);
	cdtoc[tochdr.cdth_trk1].min = tocentry.cdte_addr.msf.minute;
	cdtoc[tochdr.cdth_trk1].sec = tocentry.cdte_addr.msf.second;
	cdtoc[tochdr.cdth_trk1].frame = tocentry.cdte_addr.msf.frame;
	cdtoc[tochdr.cdth_trk1].frame += cdtoc[tochdr.cdth_trk1].min*60*75;
	cdtoc[tochdr.cdth_trk1].frame += cdtoc[tochdr.cdth_trk1].sec*75;
	close(drive);
	return tochdr.cdth_trk1;
}

#elif defined(__FreeBSD__) || defined(__bsdi__)
int 
read_toc(const char *dev) {
	int drive;
	struct ioc_toc_header tochdr;
	struct ioc_read_toc_single_entry tocentry;
	int i;

	drive = open(dev, O_RDONLY | O_NONBLOCK);
	if( drive<0 ) {
		return drive;
	}

	ioctl(drive, CDIOREADTOCHEADER, &tochdr);
	for (i = tochdr.starting_track; i <= tochdr.ending_track; i++) {
		tocentry.track = i;
		tocentry.address_format = CD_MSF_FORMAT;
		ioctl(drive, CDIOREADTOCENTRY, &tocentry);
		cdtoc[i-1].min = tocentry.entry.addr.msf.minute;
		cdtoc[i-1].sec = tocentry.entry.addr.msf.second;
		cdtoc[i-1].frame = tocentry.entry.addr.msf.frame;
		cdtoc[i-1].frame += cdtoc[i-1].min*60*75;
		cdtoc[i-1].frame += cdtoc[i-1].sec*75;
	}
	tocentry.track = 0xAA;
	tocentry.address_format = CD_MSF_FORMAT;
	ioctl(drive, CDIOREADTOCENTRY, &tocentry);
	cdtoc[tochdr.ending_track].min = tocentry.entry.addr.msf.minute;
	cdtoc[tochdr.ending_track].sec = tocentry.entry.addr.msf.second;
	cdtoc[tochdr.ending_track].frame = tocentry.entry.addr.msf.frame;
	cdtoc[tochdr.ending_track].frame += cdtoc[tochdr.ending_track].min*60*75;
	cdtoc[tochdr.ending_track].frame += cdtoc[tochdr.ending_track].sec*75;
	close(drive);
	return tochdr.ending_track;
}

#elif defined(__NetBSD__) || defined(__OpenBSD__)
int
read_toc(const char *dev) {
	int drive;
	struct ioc_toc_header tochdr;
	struct ioc_read_toc_entry tocentry;
	int i;
	struct cd_toc_entry toc_buffer;

	drive = open(dev, O_RDONLY | O_NONBLOCK);
	if( drive<0 ) {
		return drive;
	}

	ioctl(drive, CDIOREADTOCHEADER, &tochdr);
	for (i = tochdr.starting_track; i <= tochdr.ending_track; i++) {
		tocentry.starting_track = i;
		tocentry.address_format = CD_MSF_FORMAT;
		tocentry.data = &toc_buffer;
		tocentry.data_len = sizeof(toc_buffer);
		ioctl(drive, CDIOREADTOCENTRYS, &tocentry);
		cdtoc[i-1].min = toc_buffer.addr.msf.minute;
		cdtoc[i-1].sec = toc_buffer.addr.msf.second;
		cdtoc[i-1].frame = toc_buffer.addr.msf.frame;
		cdtoc[i-1].frame += cdtoc[i-1].min*60*75;
		cdtoc[i-1].frame += cdtoc[i-1].sec*75;
	}
	tocentry.starting_track = 0xAA;
	tocentry.address_format = CD_MSF_FORMAT;
	ioctl(drive, CDIOREADTOCENTRYS, &tocentry);
	cdtoc[tochdr.ending_track].min = toc_buffer.addr.msf.minute;
	cdtoc[tochdr.ending_track].sec = toc_buffer.addr.msf.second;
	cdtoc[tochdr.ending_track].frame = toc_buffer.addr.msf.frame;
	cdtoc[tochdr.ending_track].frame += cdtoc[tochdr.ending_track].min*60*75;
	cdtoc[tochdr.ending_track].frame += cdtoc[tochdr.ending_track].sec*75;
	close(drive);
	return tochdr.ending_track;
}
#endif

unsigned int 
cddb_sum(int n) {
	unsigned int ret;

	ret = 0;
	while (n > 0) {
		ret += (n % 10);
		n /= 10;
	}
	return ret;
}

unsigned long 
cddb_discid(int tot_trks) {
	unsigned int i, t = 0, n = 0;

	i = 0;
	while (i < (unsigned int)tot_trks) {
		n = n + cddb_sum((cdtoc[i].min * 60) + cdtoc[i].sec);
		i++;
	}
	t = ((cdtoc[tot_trks].min * 60) + cdtoc[tot_trks].sec) -
		((cdtoc[0].min * 60) + cdtoc[0].sec);
	return ((n % 0xff) << 24 | t << 8 | tot_trks);
}



int
cddb_http_request(char *command, int (*reply_parser)(HTTP_header_t*,cddb_data_t*), cddb_data_t *cddb_data) {
	char request[4096];
	int fd, ret = 0;
	URL_t *url;
	HTTP_header_t *http_hdr;
	
	if( reply_parser==NULL || command==NULL || cddb_data==NULL ) return -1;
	
	sprintf( request, "http://%s/~cddb/cddb.cgi?cmd=%s%s&proto=%d", cddb_data->freedb_server, command, cddb_data->cddb_hello, cddb_data->freedb_proto_level );
	printf("Request[%s]\n", request );

	url = url_new(request);
	if( url==NULL ) {
		printf("Not a valid URL\n");
		return -1;
	}
	
	fd = http_send_request(url,0);
	if( fd<0 ) {
		printf("failed to send the http request\n");
		return -1;
	}

	http_hdr = http_read_response( fd );
	if( http_hdr==NULL ) {
		printf("Failed to read the http response\n");
		return -1;
	}

	http_debug_hdr(http_hdr);
	printf("body=[%s]\n", http_hdr->body );

	switch(http_hdr->status_code) {
		case 200:
			ret = reply_parser(http_hdr, cddb_data);
			break;
		case 400:
			printf("Not Found\n");
			break;
		default:
			printf("Unknown Error code\n");
	}

	http_free( http_hdr );
	url_free( url );
	
	return ret;
}

int
cddb_read_cache(cddb_data_t *cddb_data) {
	char file_name[100];
	struct stat stats;
	int file_fd, ret;
	size_t file_size;

	if( cddb_data==NULL || cddb_data->cache_dir==NULL ) return -1;
	
	sprintf( file_name, "%s%08lx", cddb_data->cache_dir, cddb_data->disc_id);
	
	file_fd = open(file_name, O_RDONLY);
	if( file_fd<0 ) {
		printf("No cache found\n");
		return -1;
	}

	ret = fstat( file_fd, &stats );
	if( ret<0 ) {
		perror("fstat");
		file_size = 4096;
	} else {
		file_size = stats.st_size;
	}
	
	cddb_data->xmcd_file = (char*)malloc(file_size);
	if( cddb_data->xmcd_file==NULL ) {
		printf("Memory allocation failed\n");
		close(file_fd);
		return -1;
	}
	cddb_data->xmcd_file_size = read(file_fd, cddb_data->xmcd_file, file_size);
	if( cddb_data->xmcd_file_size!=file_size ) {
		printf("Not all the xmcd file has been read\n");
		close(file_fd);
		return -1;
	}
	
	close(file_fd);
	
	return 0;
}

int
cddb_write_cache(cddb_data_t *cddb_data) {
	// We have the file, save it for cache.
	struct stat file_stat;
	char file_name[100];
	int file_fd, ret;
	int wrote=0;

	if( cddb_data==NULL || cddb_data->cache_dir==NULL ) return -1;

	// Check if the CDDB cache dir exist
	ret = stat( cddb_data->cache_dir, &file_stat );
	if( ret<0 ) {
		// Directory not present, create it.
		ret = mkdir( cddb_data->cache_dir, 0755 );
		if( ret<0 ) {
			perror("mkdir");
			printf("Failed to create directory %s\n", cddb_data->cache_dir );
			return -1;
		}
	}
	
	sprintf( file_name, "%s%08lx", cddb_data->cache_dir, cddb_data->disc_id );
	
	file_fd = creat(file_name, S_IREAD|S_IWRITE);
	if( file_fd<0 ) {
		perror("create");
		return -1;
	}
	
	wrote = write(file_fd, cddb_data->xmcd_file, cddb_data->xmcd_file_size);
	if( wrote<0 ) {
		perror("write");
		close(file_fd);
		return -1;
	}
	if( (unsigned int)wrote!=cddb_data->xmcd_file_size ) {
		printf("Not all the xmcd file has been written\n");
		close(file_fd);
		return -1;
	}
	
	close(file_fd);

	return 0;
}

int
cddb_read_parse(HTTP_header_t *http_hdr, cddb_data_t *cddb_data) {
	unsigned long disc_id;
	char category[100];
	char *ptr=NULL, *ptr2=NULL;
	int ret, status;

	if( http_hdr==NULL || cddb_data==NULL ) return -1;
	
	ret = sscanf( http_hdr->body, "%d ", &status);
	if( ret!=1 ) {
		printf("Parse error\n");
		return -1;
	}

	switch(status) {
		case 210:
			ret = sscanf( http_hdr->body, "%d %s %08lx", &status, category, &disc_id);
			if( ret!=3 ) {
				printf("Parse error\n");
				return -1;
			}
			// Check if it's a xmcd database file
			ptr = strstr(http_hdr->body, "# xmcd");
			if( ptr==NULL ) {
				printf("Invalid xmcd database file returned\n");
				return -1;
			}
			// Ok found the beginning of the file
			// look for the end
			ptr2 = strstr(ptr, "\r\n.\r\n");
			if( ptr2==NULL ) {
				ptr2 = strstr(ptr, "\n.\n");
				if( ptr2==NULL ) {
					printf("Unable to find '.'\n");
					ptr2=ptr+strlen(ptr); //return -1;
				}
			}
			// Ok found the end
			// do a sanity check
			if( http_hdr->body_size<(unsigned int)(ptr2-ptr) ) {
				printf("Unexpected fix me\n");
				return -1;
			}
			cddb_data->xmcd_file = ptr;
			cddb_data->xmcd_file_size = ptr2-ptr+2;
			cddb_data->xmcd_file[cddb_data->xmcd_file_size] = '\0';
			// Avoid the http_free function to free the xmcd file...save a mempcy...
			http_hdr->body = NULL;
			http_hdr->body_size = 0;
			return cddb_write_cache(cddb_data);
		default:
			printf("Unhandled code\n");
	}
	return 0;
}

int
cddb_request_titles(cddb_data_t *cddb_data) {
	char command[1024];
	sprintf( command, "cddb+read+%s+%08lx", cddb_data->category, cddb_data->disc_id);
	return cddb_http_request(command, cddb_read_parse, cddb_data); 
}

int
cddb_parse_matches_list(HTTP_header_t *http_hdr, cddb_data_t *cddb_data) {
	char album_title[100];
	char *ptr = NULL;
	int ret;
	
	ptr = strstr(http_hdr->body, "\n");
	if( ptr==NULL ) {
		printf("Unable to find end of line\n");
		return -1;
	}
	ptr++;
	// We have a list of exact/inexact matches, so which one do we use?
	// So let's take the first one.
	ret = sscanf(ptr, "%s %08lx %s", cddb_data->category, &(cddb_data->disc_id), album_title);
	if( ret!=3 ) {
		printf("Parse error\n");
		return -1;
	}
	ptr = strstr(http_hdr->body, album_title);
	if( ptr!=NULL ) {
		char *ptr2;
		int len;
		ptr2 = strstr(ptr, "\n");
		if( ptr2==NULL ) {
			len = (http_hdr->body_size)-(ptr-(http_hdr->body));
		} else {
			len = ptr2-ptr+1;
		}
		strncpy(album_title, ptr, len);
		album_title[len-2]='\0';
	}
	printf("Parse OK, found: %s\n", album_title);
	return 0;
}

int
cddb_query_parse(HTTP_header_t *http_hdr, cddb_data_t *cddb_data) {
	char album_title[100];
	char *ptr = NULL;
	int ret, status;
	
	ret = sscanf( http_hdr->body, "%d ", &status);
	if( ret!=1 ) {
		printf("Parse error\n");
		return -1;
	}

	switch(status) {
		case 200:
			// Found exact match
			ret = sscanf(http_hdr->body, "%d %s %08lx %s", &status, cddb_data->category, &(cddb_data->disc_id), album_title);
			if( ret!=4 ) {
				printf("Parse error\n");
				return -1;
			}
			ptr = strstr(http_hdr->body, album_title);
			if( ptr!=NULL ) {
				char *ptr2;
				int len;
				ptr2 = strstr(ptr, "\n");
				if( ptr2==NULL ) {
					len = (http_hdr->body_size)-(ptr-(http_hdr->body));
				} else {
					len = ptr2-ptr+1;
				}
				strncpy(album_title, ptr, len);
				album_title[len-2]='\0';
			}
			printf("Parse OK, found: %s\n", album_title);
			return cddb_request_titles(cddb_data);
		case 202:
			// No match found
			printf("Album not found\n");
			break;
		case 210:
			// Found exact matches, list follows
			cddb_parse_matches_list(http_hdr, cddb_data);
			return cddb_request_titles(cddb_data);
/*
body=[210 Found exact matches, list follows (until terminating `.')
misc c711930d Santana / Supernatural
rock c711930d Santana / Supernatural
blues c711930d Santana / Supernatural
.]
*/	
		case 211:
			// Found inexact matches, list follows
			cddb_parse_matches_list(http_hdr, cddb_data);
			return cddb_request_titles(cddb_data);
		case 500:
			printf("Server returns: Command syntax error\n");
			break;
		default:
			printf("Unhandled code\n");
	}
	return -1;
}

int
cddb_proto_level_parse(HTTP_header_t *http_hdr, cddb_data_t *cddb_data) {
	int max;
	int ret, status;
	char *ptr;
	
	ret = sscanf( http_hdr->body, "%d ", &status);
	if( ret!=1 ) {
		printf("Parse error\n");
		return -1;
	}

	switch(status) {
		case 210:
			ptr = strstr(http_hdr->body, "max proto:");
			if( ptr==NULL ) {
				printf("Parse error\n");
				return -1;
			}
			ret = sscanf(ptr, "max proto: %d", &max);
			if( ret!=1 ) {
				printf("Parse error\n");
				return -1;
			}
			cddb_data->freedb_proto_level = max;
			return 0;
		default:
			printf("Unhandled code\n");
	}
	return -1;
}

int
cddb_get_proto_level(cddb_data_t *cddb_data) {
	return cddb_http_request("stat", cddb_proto_level_parse, cddb_data);
}

int
cddb_freedb_sites_parse(HTTP_header_t *http_hdr, cddb_data_t *cddb_data) {
	int ret, status;

	ret = sscanf( http_hdr->body, "%d ", &status);
	if( ret!=1 ) {
		printf("Parse error\n");
		return -1;
	}

	switch(status) {
		case 210:
			// TODO: Parse the sites
			ret = cddb_data->anonymous;	// For gcc complaining about unused parameter.
			return 0;
		case 401:
			printf("No sites information available\n");
			break;
		default:
			printf("Unhandled code\n");
	}
	return -1;
}

int
cddb_get_freedb_sites(cddb_data_t *cddb_data) {
	return cddb_http_request("sites", cddb_freedb_sites_parse, cddb_data);
}

void
cddb_create_hello(cddb_data_t *cddb_data) {
	char host_name[51];
	char *user_name;
	
	if( cddb_data->anonymous ) {	// Default is anonymous
		/* Note from Eduardo Pérez Ureta <eperez@it.uc3m.es> : 
		 * We don't send current user/host name in hello to prevent spam.
		 * Software that sends this is considered spyware
		 * that most people don't like.
		 */
		user_name = "anonymous";
		strcpy(host_name, "localhost");
	} else {
		if( gethostname(host_name, 50)<0 ) {
			strcpy(host_name, "localhost");
		}
		user_name = getenv("LOGNAME");
	}
	sprintf( cddb_data->cddb_hello, "&hello=%s+%s+%s+%s", user_name, host_name, "MPlayer", VERSION );
}

int 
cddb_retrieve(cddb_data_t *cddb_data) {
	char offsets[1024], command[1024];
	char *ptr;
	unsigned int i, time_len;
	int ret;

	ptr = offsets;
	for( i=0; i<cddb_data->tracks ; i++ ) {
		ptr += sprintf(ptr, "%d+", cdtoc[i].frame );
		if (ptr-offsets > sizeof offsets - 40) break;
	}
	ptr[0]=0;
	time_len = (cdtoc[cddb_data->tracks].frame)/75;
	
	cddb_data->freedb_server = DEFAULT_FREEDB_SERVER;
	cddb_data->freedb_proto_level = 1;
	cddb_data->xmcd_file = NULL;

	cddb_create_hello(cddb_data);
	if( cddb_get_proto_level(cddb_data)<0 ) {
		printf("Failed to get the protocol level\n");
		return -1;
	}

	//cddb_get_freedb_sites(&cddb_data);

	sprintf(command, "cddb+query+%08lx+%d+%s%d", cddb_data->disc_id, cddb_data->tracks, offsets, time_len );
	ret = cddb_http_request(command, cddb_query_parse, cddb_data);
	if( ret<0 ) return -1;

	if( cddb_data->cache_dir!=NULL ) {
		free(cddb_data->cache_dir);
	}
	return 0;
}

int
cddb_resolve(const char *dev, char **xmcd_file) {
	char cddb_cache_dir[] = DEFAULT_CACHE_DIR;
	char *home_dir = NULL;
	cddb_data_t cddb_data;
	int ret;

	ret = read_toc(dev);
	if( ret<0 ) {
		printf("Failed to open %s device.\n", dev);
		return -1;
	}
	cddb_data.tracks = ret;
	cddb_data.disc_id = cddb_discid(cddb_data.tracks);
	cddb_data.anonymous = 1;	// Don't send user info by default

	// Check if there is a CD in the drive
	// FIXME: That's not really a good way to check
	if( cddb_data.disc_id==0 ) {
		printf("No CD in the drive\n");
		return -1;
	}
	
	home_dir = getenv("HOME");
	if( home_dir==NULL ) {
		cddb_data.cache_dir = NULL;
	} else {
		cddb_data.cache_dir = (char*)malloc(strlen(home_dir)+strlen(cddb_cache_dir)+1);
		if( cddb_data.cache_dir==NULL ) {
			printf("Memory allocation failed\n");
			return -1;
		}
		sprintf(cddb_data.cache_dir, "%s%s", home_dir, cddb_cache_dir );
	}

	// Check for a cached file
	if( cddb_read_cache(&cddb_data)<0 ) {
		// No Cache found
		if( cddb_retrieve(&cddb_data)<0 ) {
			return -1;
		}
	}

	if( cddb_data.xmcd_file!=NULL ) {
//		printf("%s\n", cddb_data.xmcd_file );
		*xmcd_file = cddb_data.xmcd_file;
		return 0;
	}
	
	return -1;
}

/*******************************************************************************************************************
 *
 * xmcd parser
 *
 *******************************************************************************************************************/
char*
xmcd_parse_dtitle(cd_info_t *cd_info, char *line) {
	char *ptr, *album;
	ptr = strstr(line, "DTITLE=");
	if( ptr!=NULL ) {
		ptr += 7;
		album = strstr(ptr, "/");
		if( album==NULL ) return NULL;
		cd_info->album = (char*)malloc(strlen(album+2)+1);
		if( cd_info->album==NULL ) {
			return NULL;
		}
		strcpy( cd_info->album, album+2 );
		album--;
		album[0] = '\0';
		cd_info->artist = (char*)malloc(strlen(ptr)+1);
		if( cd_info->artist==NULL ) {
			return NULL;
		}
		strcpy( cd_info->artist, ptr );
	}
	return ptr;
}

char*
xmcd_parse_dgenre(cd_info_t *cd_info, char *line) {
	char *ptr;
	ptr = strstr(line, "DGENRE=");
	if( ptr!=NULL ) {
		ptr += 7;
		cd_info->genre = (char*)malloc(strlen(ptr)+1);
		if( cd_info->genre==NULL ) {
			return NULL;
		}
		strcpy( cd_info->genre, ptr );
	}
	return ptr;
}

char*
xmcd_parse_ttitle(cd_info_t *cd_info, char *line) {
	unsigned int track_nb;
	unsigned long sec, off;
	char *ptr;
	ptr = strstr(line, "TTITLE");
	if( ptr!=NULL ) {
		ptr += 6;
		// Here we point to the track number
		track_nb = atoi(ptr);
		ptr = strstr(ptr, "=");
		if( ptr==NULL ) return NULL;
		ptr++;
		
		sec = cdtoc[track_nb].frame;
		off = cdtoc[track_nb+1].frame-sec+1;

		cd_info_add_track( cd_info, ptr, track_nb+1, (unsigned int)(off/(60*75)), (unsigned int)((off/75)%60), (unsigned int)(off%75), sec, off );
	}
	return ptr;
}

cd_info_t*
cddb_parse_xmcd(char *xmcd_file) {
	cd_info_t *cd_info = NULL;
	int length, pos = 0;
	char *ptr, *ptr2;
	unsigned int audiolen;
	if( xmcd_file==NULL ) return NULL;
	
	cd_info = cd_info_new();
	if( cd_info==NULL ) {
		return NULL;
	}
	
	length = strlen(xmcd_file);
	ptr = xmcd_file;
	while( ptr!=NULL && pos<length ) {
		// Read a line
		ptr2 = ptr;
		while( ptr2[0]!='\0' && ptr2[0]!='\r' && ptr2[0]!='\n' ) ptr2++;
		if( ptr2[0]=='\0' ) {
			break;
		}
		ptr2[0] = '\0';
		// Ignore comments
		if( ptr[0]!='#' ) {
			// Search for the album title
			if( xmcd_parse_dtitle(cd_info, ptr) );
			// Search for the genre
			else if( xmcd_parse_dgenre(cd_info, ptr) );
			// Search for a track title
			else if( xmcd_parse_ttitle(cd_info, ptr) ) audiolen++;	// <-- audiolen++ to shut up gcc warning
		}
		if( ptr2[1]=='\n' ) ptr2++;
		pos = (ptr2+1)-ptr;
		ptr = ptr2+1;
	}

	audiolen = cdtoc[cd_info->nb_tracks].frame-cdtoc[0].frame;	
	cd_info->min  = (unsigned int)(audiolen/(60*75));
	cd_info->sec  = (unsigned int)((audiolen/75)%60);
	cd_info->msec = (unsigned int)(audiolen%75);
	
	return cd_info;
}

#endif