cue support wip

git-svn-id: file:///home/notaz/opt/svn/PicoDrive@432 be3aeb3a-fb24-0410-a615-afba39da0efa

Pico/cd/cue.c

@@ -0,0 +1,218 @@
+#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 (*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 - 3) : (fname - len);
+}
+
+
+#define BEGINS(buff,str) (strncmp(buff,str,sizeof(str)-1) == 0)
+
+/* note: tracks[0] is not used */
+cue_data *cue_parse(const char *fname)
+{
+	char buff[256], current_file[256], buff2[32];
+	FILE *f, *tmpf;
+	int ret, count = 0, count_alloc = 2;
+	cue_data *data;
+	void *tmp;
+
+	f = fopen(fname, "r");
+	if (f == NULL) return NULL;
+
+	current_file[0] = 0;
+	data = calloc(1, sizeof(*data) + count_alloc * sizeof(cue_track));
+
+	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 "))
+			continue;	/* who would put those here? Ignore! */
+		else if (BEGINS(buff, "FILE "))
+		{
+			get_token(buff+5, current_file, sizeof(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; }
+			}
+			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);
+			}
+			// 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"))
+				data->tracks[count].type = CT_BIN;
+			else if (strcmp(buff2, "MODE1/2048"))
+				data->tracks[count].type = CT_ISO;
+			else if (strcmp(buff2, "AUDIO"))
+			{
+				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 {
+				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, "%i:%i:%i", &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;
+		}
+		else if (BEGINS(buff, "PREGAP "))
+		{
+			int m, s, f;
+			get_token(buff+7, buff2, sizeof(buff2));
+			ret = sscanf(buff2, "%i:%i:%i", &m, &s, &f);
+			if (ret != 3) {
+				elprintf(EL_STATUS, "cue: failed to parse: \"%s\"", buff);
+				continue;
+			}
+			data->tracks[count].pregap = m*60*75 + s*75 + f;
+		}
+		else
+		{
+			elprintf(EL_STATUS, "cue: failed to parse: \"%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 *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);
+}
+
+
+int main(int argc, char *argv[])
+{
+	cue_data *data = cue_parse(argv[1]);
+	int c;
+
+	if (data == NULL) return 1;
+
+	for (c = 1; c <= data->track_count; c++)
+		printf("%2i: %i %9i %9i %s\n", c, data->tracks[c].type, data->tracks[c].sector_offset,
+			data->tracks[c].pregap, data->tracks[c].fname);
+
+	cue_destroy(data);
+
+	return 0;
+}
+