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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, "REM")) |
90 | continue; |
91 | else if (BEGINS(buff, "TITLE ") || BEGINS(buff, "PERFORMER ") || BEGINS(buff, "SONGWRITER ")) |
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92 | continue; /* who would put those here? Ignore! */ |
93 | else if (BEGINS(buff, "FILE ")) |
94 | { |
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95 | get_token(buff+5, current_filep, sizeof(current_file) - (current_filep - current_file)); |
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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; } |
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104 | data = tmp; |
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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 | } |
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119 | data->tracks[count].pregap = pending_pregap; |
120 | pending_pregap = 0; |
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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)); |
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128 | if (strcmp(buff2, "MODE1/2352") == 0) |
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129 | data->tracks[count].type = CT_BIN; |
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130 | else if (strcmp(buff2, "MODE1/2048") == 0) |
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131 | data->tracks[count].type = CT_ISO; |
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132 | else if (strcmp(buff2, "AUDIO") == 0) |
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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 | } |
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147 | else |
148 | { |
149 | // propagate previous |
150 | data->tracks[count].type = data->tracks[count-1].type; |
151 | } |
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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)); |
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169 | ret = sscanf(buff2, "%d:%d:%d", &m, &s, &f); |
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170 | if (ret != 3) { |
171 | elprintf(EL_STATUS, "cue: failed to parse: \"%s\"", buff); |
172 | count--; break; |
173 | } |
174 | data->tracks[count].sector_offset = m*60*75 + s*75 + f; |
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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 | } |
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185 | } |
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186 | else if (BEGINS(buff, "PREGAP ") || BEGINS(buff, "POSTGAP ")) |
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187 | { |
188 | int m, s, f; |
189 | get_token(buff+7, buff2, sizeof(buff2)); |
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190 | ret = sscanf(buff2, "%d:%d:%d", &m, &s, &f); |
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191 | if (ret != 3) { |
192 | elprintf(EL_STATUS, "cue: failed to parse: \"%s\"", buff); |
193 | continue; |
194 | } |
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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 = m*60*75 + s*75 + f; |
199 | else |
200 | pending_pregap = m*60*75 + s*75 + f; |
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201 | } |
202 | else |
203 | { |
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204 | elprintf(EL_STATUS, "cue: unhandled line: \"%s\"", buff); |
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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 | |
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222 | void cue_destroy(cue_data_t *data) |
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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 | |
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235 | #if 0 |
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236 | int main(int argc, char *argv[]) |
237 | { |
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238 | cue_data_t *data = cue_parse(argv[1]); |
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239 | int c; |
240 | |
241 | if (data == NULL) return 1; |
242 | |
243 | for (c = 1; c <= data->track_count; c++) |
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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); |
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247 | |
248 | cue_destroy(data); |
249 | |
250 | return 0; |
251 | } |
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252 | #endif |
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253 | |