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1 | #include <stdio.h> |
2 | #include <stdlib.h> |
3 | #include <string.h> |
4 | #include "cue.h" |
5 | |
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6 | #include "../PicoInt.h" |
7 | // #define elprintf(w,f,...) printf(f "\n",##__VA_ARGS__); |
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8 | |
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9 | #ifdef _MSC_VER |
10 | #define snprintf _snprintf |
11 | #endif |
12 | |
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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 | |
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49 | if (sep == '\"' && *p != sep) |
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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); |
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58 | return (len >= 3) ? (fname + len - 3) : fname; |
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59 | } |
60 | |
61 | |
62 | #define BEGINS(buff,str) (strncmp(buff,str,sizeof(str)-1) == 0) |
63 | |
64 | /* note: tracks[0] is not used */ |
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65 | cue_data_t *cue_parse(const char *fname) |
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66 | { |
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67 | char buff[256], current_file[256], buff2[32], *current_filep; |
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68 | FILE *f, *tmpf; |
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69 | int ret, count = 0, count_alloc = 2, pending_pregap = 0; |
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70 | cue_data_t *data; |
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71 | void *tmp; |
72 | |
73 | f = fopen(fname, "r"); |
74 | if (f == NULL) return NULL; |
75 | |
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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 | |
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80 | data = calloc(1, sizeof(*data) + count_alloc * sizeof(cue_track)); |
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81 | if (data == NULL) { |
82 | fclose(f); |
83 | return NULL; |
84 | } |
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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; |
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93 | if (BEGINS(buff, "TITLE ") || BEGINS(buff, "PERFORMER ") || BEGINS(buff, "SONGWRITER ")) |
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94 | continue; /* who would put those here? Ignore! */ |
95 | else if (BEGINS(buff, "FILE ")) |
96 | { |
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97 | get_token(buff+5, current_filep, sizeof(current_file) - (current_filep - current_file)); |
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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; } |
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106 | data = tmp; |
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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 | } |
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121 | data->tracks[count].pregap = pending_pregap; |
122 | pending_pregap = 0; |
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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)); |
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130 | if (strcmp(buff2, "MODE1/2352") == 0) |
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131 | data->tracks[count].type = CT_BIN; |
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132 | else if (strcmp(buff2, "MODE1/2048") == 0) |
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133 | data->tracks[count].type = CT_ISO; |
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134 | else if (strcmp(buff2, "AUDIO") == 0) |
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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 | } |
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149 | else |
150 | { |
151 | // propagate previous |
152 | data->tracks[count].type = data->tracks[count-1].type; |
153 | } |
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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)); |
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171 | ret = sscanf(buff2, "%d:%d:%d", &m, &s, &f); |
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172 | if (ret != 3) { |
173 | elprintf(EL_STATUS, "cue: failed to parse: \"%s\"", buff); |
174 | count--; break; |
175 | } |
176 | data->tracks[count].sector_offset = m*60*75 + s*75 + f; |
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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 | } |
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187 | } |
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188 | else if (BEGINS(buff, "PREGAP ") || BEGINS(buff, "POSTGAP ")) |
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189 | { |
190 | int m, s, f; |
191 | get_token(buff+7, buff2, sizeof(buff2)); |
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192 | ret = sscanf(buff2, "%d:%d:%d", &m, &s, &f); |
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193 | if (ret != 3) { |
194 | elprintf(EL_STATUS, "cue: failed to parse: \"%s\"", buff); |
195 | continue; |
196 | } |
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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 = m*60*75 + s*75 + f; |
201 | else |
202 | pending_pregap = m*60*75 + s*75 + f; |
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203 | } |
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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 = m*60*75 + s*75 + f; |
211 | } |
212 | else if (BEGINS(buff, "REM")) |
213 | continue; |
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214 | else |
215 | { |
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216 | elprintf(EL_STATUS, "cue: unhandled line: \"%s\"", buff); |
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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 | |
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234 | void cue_destroy(cue_data_t *data) |
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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 | |
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247 | #if 0 |
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248 | int main(int argc, char *argv[]) |
249 | { |
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250 | cue_data_t *data = cue_parse(argv[1]); |
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251 | int c; |
252 | |
253 | if (data == NULL) return 1; |
254 | |
255 | for (c = 1; c <= data->track_count; c++) |
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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); |
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259 | |
260 | cue_destroy(data); |
261 | |
262 | return 0; |
263 | } |
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264 | #endif |
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265 | |