[picodrive.git] / Pico / cd / cue.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "cue.h"

#include "../PicoInt.h"
// #define elprintf(w,f,...) printf(f "\n",##__VA_ARGS__);

static char *mystrip(char *str)
{
	int i, len;

	len = strlen(str);
	for (i = 0; i < len; i++)
		if (str[i] != ' ') break;
	if (i > 0) memmove(str, str + i, len - i + 1);

	len = strlen(str);
	for (i = len - 1; i >= 0; i--)
		if (str[i] != ' ' && str[i] != '\r' && str[i] != '\n') break;
	str[i+1] = 0;

	return str;
}

static int get_token(const char *buff, char *dest, int len)
{
	const char *p = buff;
	char sep = ' ';
	int d = 0, skip = 0;

	while (*p && *p == ' ') {
		skip++;
		p++;
	}

	if (*p == '\"') {
		sep = '\"';
		p++;
	}
	while (*p && *p != sep && d < len-1)
		dest[d++] = *p++;
	dest[d] = 0;

	if (sep == '\"' && *p != sep)
		elprintf(EL_STATUS, "cue: bad token: \"%s\"", buff);

	return d + skip;
}

static char *get_ext(char *fname)
{
	int len = strlen(fname);
	return (len >= 3) ? (fname + len - 3) : fname;
}


#define BEGINS(buff,str) (strncmp(buff,str,sizeof(str)-1) == 0)

/* note: tracks[0] is not used */
cue_data_t *cue_parse(const char *fname)
{
	char buff[256], current_file[256], buff2[32], *current_filep;
	FILE *f, *tmpf;
	int ret, count = 0, count_alloc = 2, pending_pregap = 0;
	cue_data_t *data;
	void *tmp;

	f = fopen(fname, "r");
	if (f == NULL) return NULL;

	snprintf(current_file, sizeof(current_file), "%s", fname);
	for (current_filep = current_file + strlen(current_file); current_filep > current_file; current_filep--)
		if (current_filep[-1] == '/' || current_filep[-1] == '\\') break;

	data = calloc(1, sizeof(*data) + count_alloc * sizeof(cue_track));
	if (data == NULL) {
		fclose(f);
		return NULL;
	}

	while (!feof(f))
	{
		tmp = fgets(buff, sizeof(buff), f);
		if (tmp == NULL) break;

		mystrip(buff);
		if (buff[0] == 0) continue;
		if      (BEGINS(buff, "REM"))
			continue;
		else if (BEGINS(buff, "TITLE ") || BEGINS(buff, "PERFORMER ") || BEGINS(buff, "SONGWRITER "))
			continue;	/* who would put those here? Ignore! */
		else if (BEGINS(buff, "FILE "))
		{
			get_token(buff+5, current_filep, sizeof(current_file) - (current_filep - current_file));
		}
		else if (BEGINS(buff, "TRACK "))
		{
			count++;
			if (count >= count_alloc) {
				count_alloc *= 2;
				tmp = realloc(data, sizeof(*data) + count_alloc * sizeof(cue_track));
				if (tmp == NULL) { count--; break; }
				data = tmp;
			}
			memset(&data->tracks[count], 0, sizeof(data->tracks[0]));
			if (count == 1 || strcmp(data->tracks[1].fname, current_file) != 0)
			{
				data->tracks[count].fname = strdup(current_file);
				if (data->tracks[count].fname == NULL) break;

				tmpf = fopen(current_file, "rb");
				if (tmpf == NULL) {
					elprintf(EL_STATUS, "cue: bad/missing file: \"%s\"", current_file);
					count--; break;
				}
				fclose(tmpf);
			}
			data->tracks[count].pregap = pending_pregap;
			pending_pregap = 0;
			// track number
			ret = get_token(buff+6, buff2, sizeof(buff2));
			if (count != atoi(buff2))
				elprintf(EL_STATUS, "cue: track index mismatch: track %i is track %i in cue",
					count, atoi(buff2));
			// check type
			get_token(buff+6+ret, buff2, sizeof(buff2));
			if      (strcmp(buff2, "MODE1/2352") == 0)
				data->tracks[count].type = CT_BIN;
			else if (strcmp(buff2, "MODE1/2048") == 0)
				data->tracks[count].type = CT_ISO;
			else if (strcmp(buff2, "AUDIO") == 0)
			{
				if (data->tracks[count].fname != NULL)
				{
					// rely on extension, not type in cue..
					char *ext = get_ext(data->tracks[count].fname);
					if      (strcasecmp(ext, "mp3") == 0)
						data->tracks[count].type = CT_MP3;
					else if (strcasecmp(ext, "wav") == 0)
						data->tracks[count].type = CT_WAV;
					else {
						elprintf(EL_STATUS, "unhandled audio format: \"%s\"",
							data->tracks[count].fname);
					}
				}
				else
				{
					// propagate previous
					data->tracks[count].type = data->tracks[count-1].type;
				}
			}
			else {
				elprintf(EL_STATUS, "unhandled track type: \"%s\"", buff2);
			}
		}
		else if (BEGINS(buff, "INDEX "))
		{
			int m, s, f;
			// type
			ret = get_token(buff+6, buff2, sizeof(buff2));
			if (atoi(buff2) == 0) continue;
			if (atoi(buff2) != 1) {
				elprintf(EL_STATUS, "cue: don't know how to handle: \"%s\"", buff);
				count--; break;
			}
			// offset in file
			get_token(buff+6+ret, buff2, sizeof(buff2));
			ret = sscanf(buff2, "%d:%d:%d", &m, &s, &f);
			if (ret != 3) {
				elprintf(EL_STATUS, "cue: failed to parse: \"%s\"", buff);
				count--; break;
			}
			data->tracks[count].sector_offset = m*60*75 + s*75 + f;
			// some strange .cues may need this
			if (data->tracks[count].fname != NULL && strcmp(data->tracks[count].fname, current_file) != 0)
			{
				free(data->tracks[count].fname);
				data->tracks[count].fname = strdup(current_file);
			}
			if (data->tracks[count].fname == NULL && strcmp(data->tracks[1].fname, current_file) != 0)
			{
				data->tracks[count].fname = strdup(current_file);
			}
		}
		else if (BEGINS(buff, "PREGAP ") || BEGINS(buff, "POSTGAP "))
		{
			int m, s, f;
			get_token(buff+7, buff2, sizeof(buff2));
			ret = sscanf(buff2, "%d:%d:%d", &m, &s, &f);
			if (ret != 3) {
				elprintf(EL_STATUS, "cue: failed to parse: \"%s\"", buff);
				continue;
			}
			// pregap overrides previous postgap?
			// by looking at some .cues produced by some programs I've decided that..
			if (BEGINS(buff, "PREGAP "))
				data->tracks[count].pregap = m*60*75 + s*75 + f;
			else
				pending_pregap = m*60*75 + s*75 + f;
		}
		else
		{
			elprintf(EL_STATUS, "cue: unhandled line: \"%s\"", buff);
		}
	}

	if (count < 1 || data->tracks[1].fname == NULL) {
		// failed..
		for (; count > 0; count--)
			if (data->tracks[count].fname != NULL)
				free(data->tracks[count].fname);
		free(data);
		return NULL;
	}

	data->track_count = count;
	return data;
}


void cue_destroy(cue_data_t *data)
{
	int c;

	if (data == NULL) return;

	for (c = data->track_count; c > 0; c--)
		if (data->tracks[c].fname != NULL)
			free(data->tracks[c].fname);
	free(data);
}


#if 0
int main(int argc, char *argv[])
{
	cue_data_t *data = cue_parse(argv[1]);
	int c;

	if (data == NULL) return 1;

	for (c = 1; c <= data->track_count; c++)
		printf("%2i: %i %9i %02i:%02i:%02i %9i %s\n", c, data->tracks[c].type, data->tracks[c].sector_offset,
			data->tracks[c].sector_offset / (75*60), data->tracks[c].sector_offset / 75 % 60,
			data->tracks[c].sector_offset % 75, data->tracks[c].pregap, data->tracks[c].fname);

	cue_destroy(data);

	return 0;
}
#endif
Commit	Line	Data
	1	#include <stdio.h>
	2	#include <stdlib.h>
	3	#include <string.h>
	4	#include "cue.h"
	5
	6	#include "../PicoInt.h"
	7	// #define elprintf(w,f,...) printf(f "\n",##__VA_ARGS__);
	8
	9	static char mystrip(char str)
	10	{
	11	int i, len;
	12
	13	len = strlen(str);
	14	for (i = 0; i < len; i++)
	15	if (str[i] != ' ') break;
	16	if (i > 0) memmove(str, str + i, len - i + 1);
	17
	18	len = strlen(str);
	19	for (i = len - 1; i >= 0; i--)
	20	if (str[i] != ' ' && str[i] != '\r' && str[i] != '\n') break;
	21	str[i+1] = 0;
	22
	23	return str;
	24	}
	25
	26	static int get_token(const char buff, char dest, int len)
	27	{
	28	const char *p = buff;
	29	char sep = ' ';
	30	int d = 0, skip = 0;
	31
	32	while (p && p == ' ') {
	33	skip++;
	34	p++;
	35	}
	36
	37	if (*p == '\"') {
	38	sep = '\"';
	39	p++;
	40	}
	41	while (p && p != sep && d < len-1)
	42	dest[d++] = *p++;
	43	dest[d] = 0;
	44
	45	if (sep == '\"' && *p != sep)
	46	elprintf(EL_STATUS, "cue: bad token: \"%s\"", buff);
	47
	48	return d + skip;
	49	}
	50
	51	static char get_ext(char fname)
	52	{
	53	int len = strlen(fname);
	54	return (len >= 3) ? (fname + len - 3) : fname;
	55	}
	56
	57
	58	#define BEGINS(buff,str) (strncmp(buff,str,sizeof(str)-1) == 0)
	59
	60	/* note: tracks[0] is not used */
	61	cue_data_t cue_parse(const char fname)
	62	{
	63	char buff[256], current_file[256], buff2[32], *current_filep;
	64	FILE f, tmpf;
	65	int ret, count = 0, count_alloc = 2, pending_pregap = 0;
	66	cue_data_t *data;
	67	void *tmp;
	68
	69	f = fopen(fname, "r");
	70	if (f == NULL) return NULL;
	71
	72	snprintf(current_file, sizeof(current_file), "%s", fname);
	73	for (current_filep = current_file + strlen(current_file); current_filep > current_file; current_filep--)
	74	if (current_filep[-1] == '/' \|\| current_filep[-1] == '\\') break;
	75
	76	data = calloc(1, sizeof(data) + count_alloc sizeof(cue_track));
	77	if (data == NULL) {
	78	fclose(f);
	79	return NULL;
	80	}
	81
	82	while (!feof(f))
	83	{
	84	tmp = fgets(buff, sizeof(buff), f);
	85	if (tmp == NULL) break;
	86
	87	mystrip(buff);
	88	if (buff[0] == 0) continue;
	89	if (BEGINS(buff, "REM"))
	90	continue;
	91	else if (BEGINS(buff, "TITLE ") \|\| BEGINS(buff, "PERFORMER ") \|\| BEGINS(buff, "SONGWRITER "))
	92	continue; /* who would put those here? Ignore! */
	93	else if (BEGINS(buff, "FILE "))
	94	{
	95	get_token(buff+5, current_filep, sizeof(current_file) - (current_filep - current_file));
	96	}
	97	else if (BEGINS(buff, "TRACK "))
	98	{
	99	count++;
	100	if (count >= count_alloc) {
	101	count_alloc *= 2;
	102	tmp = realloc(data, sizeof(data) + count_alloc sizeof(cue_track));
	103	if (tmp == NULL) { count--; break; }
	104	data = tmp;
	105	}
	106	memset(&data->tracks[count], 0, sizeof(data->tracks[0]));
	107	if (count == 1 \|\| strcmp(data->tracks[1].fname, current_file) != 0)
	108	{
	109	data->tracks[count].fname = strdup(current_file);
	110	if (data->tracks[count].fname == NULL) break;
	111
	112	tmpf = fopen(current_file, "rb");
	113	if (tmpf == NULL) {
	114	elprintf(EL_STATUS, "cue: bad/missing file: \"%s\"", current_file);
	115	count--; break;
	116	}
	117	fclose(tmpf);
	118	}
	119	data->tracks[count].pregap = pending_pregap;
	120	pending_pregap = 0;
	121	// track number
	122	ret = get_token(buff+6, buff2, sizeof(buff2));
	123	if (count != atoi(buff2))
	124	elprintf(EL_STATUS, "cue: track index mismatch: track %i is track %i in cue",
	125	count, atoi(buff2));
	126	// check type
	127	get_token(buff+6+ret, buff2, sizeof(buff2));
	128	if (strcmp(buff2, "MODE1/2352") == 0)
	129	data->tracks[count].type = CT_BIN;
	130	else if (strcmp(buff2, "MODE1/2048") == 0)
	131	data->tracks[count].type = CT_ISO;
	132	else if (strcmp(buff2, "AUDIO") == 0)
	133	{
	134	if (data->tracks[count].fname != NULL)
	135	{
	136	// rely on extension, not type in cue..
	137	char *ext = get_ext(data->tracks[count].fname);
	138	if (strcasecmp(ext, "mp3") == 0)
	139	data->tracks[count].type = CT_MP3;
	140	else if (strcasecmp(ext, "wav") == 0)
	141	data->tracks[count].type = CT_WAV;
	142	else {
	143	elprintf(EL_STATUS, "unhandled audio format: \"%s\"",
	144	data->tracks[count].fname);
	145	}
	146	}
	147	else
	148	{
	149	// propagate previous
	150	data->tracks[count].type = data->tracks[count-1].type;
	151	}
	152	}
	153	else {
	154	elprintf(EL_STATUS, "unhandled track type: \"%s\"", buff2);
	155	}
	156	}
	157	else if (BEGINS(buff, "INDEX "))
	158	{
	159	int m, s, f;
	160	// type
	161	ret = get_token(buff+6, buff2, sizeof(buff2));
	162	if (atoi(buff2) == 0) continue;
	163	if (atoi(buff2) != 1) {
	164	elprintf(EL_STATUS, "cue: don't know how to handle: \"%s\"", buff);
	165	count--; break;
	166	}
	167	// offset in file
	168	get_token(buff+6+ret, buff2, sizeof(buff2));
	169	ret = sscanf(buff2, "%d:%d:%d", &m, &s, &f);
	170	if (ret != 3) {
	171	elprintf(EL_STATUS, "cue: failed to parse: \"%s\"", buff);
	172	count--; break;
	173	}
	174	data->tracks[count].sector_offset = m6075 + s*75 + f;
	175	// some strange .cues may need this
	176	if (data->tracks[count].fname != NULL && strcmp(data->tracks[count].fname, current_file) != 0)
	177	{
	178	free(data->tracks[count].fname);
	179	data->tracks[count].fname = strdup(current_file);
	180	}
	181	if (data->tracks[count].fname == NULL && strcmp(data->tracks[1].fname, current_file) != 0)
	182	{
	183	data->tracks[count].fname = strdup(current_file);
	184	}
	185	}
	186	else if (BEGINS(buff, "PREGAP ") \|\| BEGINS(buff, "POSTGAP "))
	187	{
	188	int m, s, f;
	189	get_token(buff+7, buff2, sizeof(buff2));
	190	ret = sscanf(buff2, "%d:%d:%d", &m, &s, &f);
	191	if (ret != 3) {
	192	elprintf(EL_STATUS, "cue: failed to parse: \"%s\"", buff);
	193	continue;
	194	}
	195	// pregap overrides previous postgap?
	196	// by looking at some .cues produced by some programs I've decided that..
	197	if (BEGINS(buff, "PREGAP "))
	198	data->tracks[count].pregap = m6075 + s*75 + f;
	199	else
	200	pending_pregap = m6075 + s*75 + f;
	201	}
	202	else
	203	{
	204	elprintf(EL_STATUS, "cue: unhandled line: \"%s\"", buff);
	205	}
	206	}
	207
	208	if (count < 1 \|\| data->tracks[1].fname == NULL) {
	209	// failed..
	210	for (; count > 0; count--)
	211	if (data->tracks[count].fname != NULL)
	212	free(data->tracks[count].fname);
	213	free(data);
	214	return NULL;
	215	}
	216
	217	data->track_count = count;
	218	return data;
	219	}
	220
	221
	222	void cue_destroy(cue_data_t *data)
	223	{
	224	int c;
	225
	226	if (data == NULL) return;
	227
	228	for (c = data->track_count; c > 0; c--)
	229	if (data->tracks[c].fname != NULL)
	230	free(data->tracks[c].fname);
	231	free(data);
	232	}
	233
	234
	235	#if 0
	236	int main(int argc, char *argv[])
	237	{
	238	cue_data_t *data = cue_parse(argv[1]);
	239	int c;
	240
	241	if (data == NULL) return 1;
	242
	243	for (c = 1; c <= data->track_count; c++)
	244	printf("%2i: %i %9i %02i:%02i:%02i %9i %s\n", c, data->tracks[c].type, data->tracks[c].sector_offset,
	245	data->tracks[c].sector_offset / (75*60), data->tracks[c].sector_offset / 75 % 60,
	246	data->tracks[c].sector_offset % 75, data->tracks[c].pregap, data->tracks[c].fname);
	247
	248	cue_destroy(data);
	249
	250	return 0;
	251	}
	252	#endif
	253