[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__);

#ifdef _MSC_VER
#define snprintf _snprintf
#endif

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, "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 if (BEGINS(buff, "REM LENGTH ")) // custom "extension"
		{
			int m, s, f;
			get_token(buff+11, buff2, sizeof(buff2));
			ret = sscanf(buff2, "%d:%d:%d", &m, &s, &f);
			if (ret != 3) continue;
			data->tracks[count].sector_xlength = m*60*75 + s*75 + f;
		}
		else if (BEGINS(buff, "REM"))
			continue;
		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	#ifdef _MSC_VER
	10	#define snprintf _snprintf
	11	#endif
	12
	13	static char mystrip(char str)
	14	{
	15	int i, len;
	16
	17	len = strlen(str);
	18	for (i = 0; i < len; i++)
	19	if (str[i] != ' ') break;
	20	if (i > 0) memmove(str, str + i, len - i + 1);
	21
	22	len = strlen(str);
	23	for (i = len - 1; i >= 0; i--)
	24	if (str[i] != ' ' && str[i] != '\r' && str[i] != '\n') break;
	25	str[i+1] = 0;
	26
	27	return str;
	28	}
	29
	30	static int get_token(const char buff, char dest, int len)
	31	{
	32	const char *p = buff;
	33	char sep = ' ';
	34	int d = 0, skip = 0;
	35
	36	while (p && p == ' ') {
	37	skip++;
	38	p++;
	39	}
	40
	41	if (*p == '\"') {
	42	sep = '\"';
	43	p++;
	44	}
	45	while (p && p != sep && d < len-1)
	46	dest[d++] = *p++;
	47	dest[d] = 0;
	48
	49	if (sep == '\"' && *p != sep)
	50	elprintf(EL_STATUS, "cue: bad token: \"%s\"", buff);
	51
	52	return d + skip;
	53	}
	54
	55	static char get_ext(char fname)
	56	{
	57	int len = strlen(fname);
	58	return (len >= 3) ? (fname + len - 3) : fname;
	59	}
	60
	61
	62	#define BEGINS(buff,str) (strncmp(buff,str,sizeof(str)-1) == 0)
	63
	64	/* note: tracks[0] is not used */
	65	cue_data_t cue_parse(const char fname)
	66	{
	67	char buff[256], current_file[256], buff2[32], *current_filep;
	68	FILE f, tmpf;
	69	int ret, count = 0, count_alloc = 2, pending_pregap = 0;
	70	cue_data_t *data;
	71	void *tmp;
	72
	73	f = fopen(fname, "r");
	74	if (f == NULL) return NULL;
	75
	76	snprintf(current_file, sizeof(current_file), "%s", fname);
	77	for (current_filep = current_file + strlen(current_file); current_filep > current_file; current_filep--)
	78	if (current_filep[-1] == '/' \|\| current_filep[-1] == '\\') break;
	79
	80	data = calloc(1, sizeof(data) + count_alloc sizeof(cue_track));
	81	if (data == NULL) {
	82	fclose(f);
	83	return NULL;
	84	}
	85
	86	while (!feof(f))
	87	{
	88	tmp = fgets(buff, sizeof(buff), f);
	89	if (tmp == NULL) break;
	90
	91	mystrip(buff);
	92	if (buff[0] == 0) continue;
	93	if (BEGINS(buff, "TITLE ") \|\| BEGINS(buff, "PERFORMER ") \|\| BEGINS(buff, "SONGWRITER "))
	94	continue; /* who would put those here? Ignore! */
	95	else if (BEGINS(buff, "FILE "))
	96	{
	97	get_token(buff+5, current_filep, sizeof(current_file) - (current_filep - current_file));
	98	}
	99	else if (BEGINS(buff, "TRACK "))
	100	{
	101	count++;
	102	if (count >= count_alloc) {
	103	count_alloc *= 2;
	104	tmp = realloc(data, sizeof(data) + count_alloc sizeof(cue_track));
	105	if (tmp == NULL) { count--; break; }
	106	data = tmp;
	107	}
	108	memset(&data->tracks[count], 0, sizeof(data->tracks[0]));
	109	if (count == 1 \|\| strcmp(data->tracks[1].fname, current_file) != 0)
	110	{
	111	data->tracks[count].fname = strdup(current_file);
	112	if (data->tracks[count].fname == NULL) break;
	113
	114	tmpf = fopen(current_file, "rb");
	115	if (tmpf == NULL) {
	116	elprintf(EL_STATUS, "cue: bad/missing file: \"%s\"", current_file);
	117	count--; break;
	118	}
	119	fclose(tmpf);
	120	}
	121	data->tracks[count].pregap = pending_pregap;
	122	pending_pregap = 0;
	123	// track number
	124	ret = get_token(buff+6, buff2, sizeof(buff2));
	125	if (count != atoi(buff2))
	126	elprintf(EL_STATUS, "cue: track index mismatch: track %i is track %i in cue",
	127	count, atoi(buff2));
	128	// check type
	129	get_token(buff+6+ret, buff2, sizeof(buff2));
	130	if (strcmp(buff2, "MODE1/2352") == 0)
	131	data->tracks[count].type = CT_BIN;
	132	else if (strcmp(buff2, "MODE1/2048") == 0)
	133	data->tracks[count].type = CT_ISO;
	134	else if (strcmp(buff2, "AUDIO") == 0)
	135	{
	136	if (data->tracks[count].fname != NULL)
	137	{
	138	// rely on extension, not type in cue..
	139	char *ext = get_ext(data->tracks[count].fname);
	140	if (strcasecmp(ext, "mp3") == 0)
	141	data->tracks[count].type = CT_MP3;
	142	else if (strcasecmp(ext, "wav") == 0)
	143	data->tracks[count].type = CT_WAV;
	144	else {
	145	elprintf(EL_STATUS, "unhandled audio format: \"%s\"",
	146	data->tracks[count].fname);
	147	}
	148	}
	149	else
	150	{
	151	// propagate previous
	152	data->tracks[count].type = data->tracks[count-1].type;
	153	}
	154	}
	155	else {
	156	elprintf(EL_STATUS, "unhandled track type: \"%s\"", buff2);
	157	}
	158	}
	159	else if (BEGINS(buff, "INDEX "))
	160	{
	161	int m, s, f;
	162	// type
	163	ret = get_token(buff+6, buff2, sizeof(buff2));
	164	if (atoi(buff2) == 0) continue;
	165	if (atoi(buff2) != 1) {
	166	elprintf(EL_STATUS, "cue: don't know how to handle: \"%s\"", buff);
	167	count--; break;
	168	}
	169	// offset in file
	170	get_token(buff+6+ret, buff2, sizeof(buff2));
	171	ret = sscanf(buff2, "%d:%d:%d", &m, &s, &f);
	172	if (ret != 3) {
	173	elprintf(EL_STATUS, "cue: failed to parse: \"%s\"", buff);
	174	count--; break;
	175	}
	176	data->tracks[count].sector_offset = m6075 + s*75 + f;
	177	// some strange .cues may need this
	178	if (data->tracks[count].fname != NULL && strcmp(data->tracks[count].fname, current_file) != 0)
	179	{
	180	free(data->tracks[count].fname);
	181	data->tracks[count].fname = strdup(current_file);
	182	}
	183	if (data->tracks[count].fname == NULL && strcmp(data->tracks[1].fname, current_file) != 0)
	184	{
	185	data->tracks[count].fname = strdup(current_file);
	186	}
	187	}
	188	else if (BEGINS(buff, "PREGAP ") \|\| BEGINS(buff, "POSTGAP "))
	189	{
	190	int m, s, f;
	191	get_token(buff+7, buff2, sizeof(buff2));
	192	ret = sscanf(buff2, "%d:%d:%d", &m, &s, &f);
	193	if (ret != 3) {
	194	elprintf(EL_STATUS, "cue: failed to parse: \"%s\"", buff);
	195	continue;
	196	}
	197	// pregap overrides previous postgap?
	198	// by looking at some .cues produced by some programs I've decided that..
	199	if (BEGINS(buff, "PREGAP "))
	200	data->tracks[count].pregap = m6075 + s*75 + f;
	201	else
	202	pending_pregap = m6075 + s*75 + f;
	203	}
	204	else if (BEGINS(buff, "REM LENGTH ")) // custom "extension"
	205	{
	206	int m, s, f;
	207	get_token(buff+11, buff2, sizeof(buff2));
	208	ret = sscanf(buff2, "%d:%d:%d", &m, &s, &f);
	209	if (ret != 3) continue;
	210	data->tracks[count].sector_xlength = m6075 + s*75 + f;
	211	}
	212	else if (BEGINS(buff, "REM"))
	213	continue;
	214	else
	215	{
	216	elprintf(EL_STATUS, "cue: unhandled line: \"%s\"", buff);
	217	}
	218	}
	219
	220	if (count < 1 \|\| data->tracks[1].fname == NULL) {
	221	// failed..
	222	for (; count > 0; count--)
	223	if (data->tracks[count].fname != NULL)
	224	free(data->tracks[count].fname);
	225	free(data);
	226	return NULL;
	227	}
	228
	229	data->track_count = count;
	230	return data;
	231	}
	232
	233
	234	void cue_destroy(cue_data_t *data)
	235	{
	236	int c;
	237
	238	if (data == NULL) return;
	239
	240	for (c = data->track_count; c > 0; c--)
	241	if (data->tracks[c].fname != NULL)
	242	free(data->tracks[c].fname);
	243	free(data);
	244	}
	245
	246
	247	#if 0
	248	int main(int argc, char *argv[])
	249	{
	250	cue_data_t *data = cue_parse(argv[1]);
	251	int c;
	252
	253	if (data == NULL) return 1;
	254
	255	for (c = 1; c <= data->track_count; c++)
	256	printf("%2i: %i %9i %02i:%02i:%02i %9i %s\n", c, data->tracks[c].type, data->tracks[c].sector_offset,
	257	data->tracks[c].sector_offset / (75*60), data->tracks[c].sector_offset / 75 % 60,
	258	data->tracks[c].sector_offset % 75, data->tracks[c].pregap, data->tracks[c].fname);
	259
	260	cue_destroy(data);
	261
	262	return 0;
	263	}
	264	#endif
	265