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