| 1 | #include <stdlib.h> |
| 2 | #include <stdio.h> |
| 3 | #include <unistd.h> |
| 4 | #include <string.h> |
| 5 | #include <stdint.h> |
| 6 | |
| 7 | int trackno = 0; |
| 8 | int tickres; |
| 9 | |
| 10 | unsigned char fgetuc(FILE *in) |
| 11 | { |
| 12 | return((unsigned char)fgetc(in)); |
| 13 | } |
| 14 | |
| 15 | int fgetl(FILE *in) |
| 16 | { |
| 17 | return((fgetuc(in) << 24) | |
| 18 | (fgetuc(in) << 16) | |
| 19 | (fgetuc(in) << 8) | |
| 20 | fgetuc(in)); |
| 21 | } |
| 22 | |
| 23 | int fgetus(FILE *in) |
| 24 | { |
| 25 | return((fgetuc(in) << 8) | fgetuc(in)); |
| 26 | } |
| 27 | |
| 28 | int fget3b(FILE *in) |
| 29 | { |
| 30 | return((fgetuc(in) << 16) | (fgetuc(in) << 8) | fgetuc(in)); |
| 31 | } |
| 32 | |
| 33 | int fgetv(FILE *in, int *nb) |
| 34 | { |
| 35 | int ret; |
| 36 | unsigned char c; |
| 37 | |
| 38 | for(ret = 0, c = 0x80, *nb = 0; (c & 0x80); ret = (ret << 7) | (c & 0x7f)) { |
| 39 | c = fgetuc(in); |
| 40 | (*nb)++; |
| 41 | if(*nb == 5) { |
| 42 | fprintf(stderr, "miditool: reading too many bytes from a variant number\n"); |
| 43 | exit(1); |
| 44 | } |
| 45 | } |
| 46 | return(ret); |
| 47 | } |
| 48 | |
| 49 | void fputl(uint32_t val, FILE *out) |
| 50 | { |
| 51 | int i; |
| 52 | |
| 53 | for(i = 24; i >= 0; i -= 8) |
| 54 | fputc((val & (0xff << i)) >> i, out); |
| 55 | } |
| 56 | |
| 57 | void fputus(uint16_t val, FILE *out) |
| 58 | { |
| 59 | int i; |
| 60 | |
| 61 | for(i = 8; i >= 0; i -= 8) |
| 62 | fputc((val & (0xff << i)) >> i, out); |
| 63 | } |
| 64 | |
| 65 | void fskip(FILE *in, int bytes) |
| 66 | { |
| 67 | char *dummy; |
| 68 | |
| 69 | dummy = malloc(bytes); |
| 70 | fread(dummy, 1, bytes, in); |
| 71 | free(dummy); |
| 72 | } |
| 73 | |
| 74 | void dumphead(FILE *in, FILE *out) |
| 75 | { |
| 76 | int type, ntrk, res; |
| 77 | |
| 78 | type = fgetus(in); |
| 79 | ntrk = fgetus(in); |
| 80 | tickres = res = fgetus(in); |
| 81 | fprintf(out, "header %i %i %i\n", type, ntrk, res); |
| 82 | fprintf(out, "# Type: %i ", type); |
| 83 | if(type == 0) |
| 84 | fprintf(out, "(Single track)\n"); |
| 85 | else if(type == 1) |
| 86 | fprintf(out, "(Simultaneous tracks)\n"); |
| 87 | else if(type == 2) |
| 88 | fprintf(out, "(Sequential tracks)\n"); |
| 89 | else |
| 90 | fprintf(out, "(Unknown)\n"); |
| 91 | fprintf(out, "# Number of tracks: %i\n", ntrk); |
| 92 | fprintf(out, "# Resolution: %i ticks/qn\n", res); |
| 93 | } |
| 94 | |
| 95 | int dumptrack(FILE *in, FILE *out, ssize_t len) |
| 96 | { |
| 97 | int nb, dt, cmd, pcmd, mlen, llen; |
| 98 | int chan, note, val, id; |
| 99 | int tick; |
| 100 | |
| 101 | fprintf(out, "track\n"); |
| 102 | fprintf(out, "# Number %i\n", trackno++); |
| 103 | fprintf(out, "# Length: %zi bytes\n", len); |
| 104 | pcmd = 0; |
| 105 | tick = 0; |
| 106 | while(len > 0) { |
| 107 | dt = fgetv(in, &nb); |
| 108 | tick += dt; |
| 109 | len -= nb; |
| 110 | cmd = fgetuc(in); |
| 111 | len--; |
| 112 | |
| 113 | if(!(cmd & 0x80)) |
| 114 | cmd = pcmd; |
| 115 | pcmd = cmd; |
| 116 | if(!(cmd & 0x80)) { |
| 117 | fprintf(stderr, "miditool: illegal command (< 0x80)\n"); |
| 118 | fskip(in, len); |
| 119 | return(1); |
| 120 | } |
| 121 | |
| 122 | chan = cmd & 0x0f; |
| 123 | cmd >>= 4; |
| 124 | if(cmd != 15) |
| 125 | fprintf(out, "ev %i %i ", tick, chan); |
| 126 | switch(cmd) { |
| 127 | case 8: |
| 128 | case 9: |
| 129 | note = fgetuc(in); |
| 130 | val = fgetuc(in); |
| 131 | len -= 2; |
| 132 | fprintf(out, "%s %i %i", (cmd == 9)?"on":"off", note, val); |
| 133 | break; |
| 134 | case 10: |
| 135 | val = fgetus(in); |
| 136 | len -= 2; |
| 137 | fprintf(out, "poly %i", val); |
| 138 | break; |
| 139 | case 11: |
| 140 | id = fgetuc(in); |
| 141 | val = fgetuc(in); |
| 142 | len -= 2; |
| 143 | fprintf(out, "ctrl %i %i", id, val); |
| 144 | break; |
| 145 | case 12: |
| 146 | val = fgetuc(in); |
| 147 | len--; |
| 148 | fprintf(out, "prgm %i", val); |
| 149 | break; |
| 150 | case 13: |
| 151 | val = fgetuc(in); |
| 152 | len--; |
| 153 | fprintf(out, "mono %i", val); |
| 154 | break; |
| 155 | case 14: |
| 156 | val = fgetus(in) - 8192; |
| 157 | len -= 2; |
| 158 | fprintf(out, "bend %i", val); |
| 159 | break; |
| 160 | case 15: |
| 161 | switch(chan) { |
| 162 | case 0: |
| 163 | fprintf(out, "msg0 "); |
| 164 | mlen = fgetv(in, &nb); |
| 165 | len -= nb; |
| 166 | for(; mlen > 0; mlen--) { |
| 167 | fprintf(out, "%02x", fgetuc(in)); |
| 168 | len--; |
| 169 | if(mlen > 0) |
| 170 | fputc(' ', out); |
| 171 | } |
| 172 | fputc('\n', out); |
| 173 | break; |
| 174 | case 7: |
| 175 | fprintf(out, "msg7 "); |
| 176 | mlen = fgetv(in, &nb); |
| 177 | len -= nb; |
| 178 | for(; mlen > 0; mlen--) { |
| 179 | fprintf(out, "%02x", fgetuc(in)); |
| 180 | len--; |
| 181 | if(mlen > 0) |
| 182 | fputc(' ', out); |
| 183 | } |
| 184 | fputc('\n', out); |
| 185 | break; |
| 186 | case 15: |
| 187 | id = fgetuc(in); |
| 188 | len--; |
| 189 | mlen = fgetv(in, &nb); |
| 190 | len -= nb; |
| 191 | llen = 0; |
| 192 | switch(id) { |
| 193 | case 1 ... 9: |
| 194 | fprintf(out, "text %i ", id); |
| 195 | for(llen = 0; llen < mlen; llen++) { |
| 196 | val = fgetuc(in); |
| 197 | if((val >= 20) && (val <= 126)) { |
| 198 | fputc(val, out); |
| 199 | } else { |
| 200 | fprintf(out, "\\%03o", val); |
| 201 | } |
| 202 | } |
| 203 | fputc('\n', out); |
| 204 | break; |
| 205 | case 0x2f: |
| 206 | fprintf(out, "end\n"); |
| 207 | break; |
| 208 | case 0x51: |
| 209 | val = fget3b(in); |
| 210 | llen = 3; |
| 211 | fprintf(out, "tempo %i\n", val); |
| 212 | fprintf(out, "# (%i us/qn) / (%i ticks/qn) = (%i us/tick)\n", val, tickres, val / tickres); |
| 213 | break; |
| 214 | default: |
| 215 | fprintf(out, "meta %i ", id); |
| 216 | for(; mlen > 0; mlen--) { |
| 217 | fprintf(out, "%02x", fgetuc(in)); |
| 218 | len--; |
| 219 | if(mlen > 0) |
| 220 | fputc(' ', out); |
| 221 | } |
| 222 | fputc('\n', out); |
| 223 | fprintf(stderr, "miditool: warning: unknown midi meta event %i\n", id); |
| 224 | fskip(in, mlen); |
| 225 | len -= mlen; |
| 226 | llen = -1; |
| 227 | break; |
| 228 | } |
| 229 | if(llen != -1) { |
| 230 | len -= llen; |
| 231 | if(llen < mlen) { |
| 232 | fskip(in, mlen - llen); |
| 233 | len -= mlen - llen; |
| 234 | fprintf(stderr, "miditool: warning: too little data read from meta event %i (%i < %i)\n", id, llen, mlen); |
| 235 | } else if(llen > mlen) { |
| 236 | fprintf(stderr, "miditool: too much data read from meta event %i (%i > %i)\n", id, llen, mlen); |
| 237 | fskip(in, len); |
| 238 | return(1); |
| 239 | } |
| 240 | } |
| 241 | break; |
| 242 | default: |
| 243 | fprintf(stderr, "miditool: unknown midi special event %i\n", chan); |
| 244 | fskip(in, len); |
| 245 | return(1); |
| 246 | } |
| 247 | break; |
| 248 | } |
| 249 | if(cmd != 15) |
| 250 | fputc('\n', out); |
| 251 | } |
| 252 | if(len < 0) { |
| 253 | fprintf(stderr, "miditool: read %i bytes too much from track from track\n", -len); |
| 254 | return(1); |
| 255 | } |
| 256 | return(0); |
| 257 | } |
| 258 | |
| 259 | int dumpchunk(FILE *in, FILE *out) |
| 260 | { |
| 261 | char id[4]; |
| 262 | size_t len; |
| 263 | |
| 264 | if((fread(id, 1, 4, in)) == 0) |
| 265 | return(0); |
| 266 | len = fgetl(in); |
| 267 | if(!memcmp(id, "MThd", 4)) { |
| 268 | if(len != 6) { |
| 269 | fprintf(stderr, "miditool: invalid header chunk of length %zi\n", len); |
| 270 | return(1); |
| 271 | } |
| 272 | dumphead(in, out); |
| 273 | } else if(!memcmp(id, "MTrk", 4)) { |
| 274 | if(dumptrack(in, out, len)) |
| 275 | return(1); |
| 276 | } else { |
| 277 | fprintf(out, "# Unknown chunk type (%.4s) of length %zi\n", id, len); |
| 278 | fskip(in, len); |
| 279 | } |
| 280 | return(0); |
| 281 | } |
| 282 | |
| 283 | char *constrack(FILE *in, int *len) |
| 284 | { |
| 285 | unsigned char *bp; |
| 286 | char *buf; |
| 287 | char line[128], *p; |
| 288 | int sz; |
| 289 | int ltime, chan; |
| 290 | |
| 291 | void putv(int v, int c) { |
| 292 | if(v >= 128) |
| 293 | putv(v >> 7, 1); |
| 294 | *(bp++) = (c?0x80:0) | (v & 0x7f); |
| 295 | } |
| 296 | void putb(int v, int n) { |
| 297 | if(n > 1) |
| 298 | putb(v >> 8, n - 1); |
| 299 | *(bp++) = v & 0xff; |
| 300 | } |
| 301 | |
| 302 | buf = malloc(sz = 65536); |
| 303 | bp = (unsigned char *)buf; |
| 304 | ltime = 0; |
| 305 | while(fgets(line, sizeof(line), in) != NULL) { |
| 306 | if(((char *)bp - buf) < 32768) |
| 307 | buf = realloc(buf, sz += 65536); |
| 308 | p = strtok(line, " "); |
| 309 | if((p == NULL) || (p[0] == '#')) |
| 310 | continue; |
| 311 | if(!strcmp(p, "ev")) { |
| 312 | if((p = strtok(NULL, " ")) == NULL) { |
| 313 | fprintf(stderr, "miditool: truncated ev line\n"); |
| 314 | goto err; |
| 315 | } |
| 316 | putv(atoi(p) - ltime, 0); |
| 317 | ltime = atoi(p); |
| 318 | if((p = strtok(NULL, " ")) == NULL) { |
| 319 | fprintf(stderr, "miditool: truncated ev line\n"); |
| 320 | goto err; |
| 321 | } |
| 322 | chan = atoi(p); |
| 323 | if((p = strtok(NULL, " ")) == NULL) { |
| 324 | fprintf(stderr, "miditool: truncated ev line\n"); |
| 325 | goto err; |
| 326 | } |
| 327 | if(!strcmp(p, "on")) { |
| 328 | *(bp++) = 0x90 | chan; |
| 329 | if((p = strtok(NULL, " ")) == NULL) { |
| 330 | fprintf(stderr, "miditool: truncated ev on line\n"); |
| 331 | goto err; |
| 332 | } |
| 333 | *(bp++) = atoi(p); |
| 334 | if((p = strtok(NULL, " ")) == NULL) { |
| 335 | fprintf(stderr, "miditool: truncated ev on line\n"); |
| 336 | goto err; |
| 337 | } |
| 338 | *(bp++) = atoi(p); |
| 339 | } else if(!strcmp(p, "off")) { |
| 340 | *(bp++) = 0x80 | chan; |
| 341 | if((p = strtok(NULL, " ")) == NULL) { |
| 342 | fprintf(stderr, "miditool: truncated ev on line\n"); |
| 343 | goto err; |
| 344 | } |
| 345 | *(bp++) = atoi(p); |
| 346 | if((p = strtok(NULL, " ")) == NULL) { |
| 347 | fprintf(stderr, "miditool: truncated ev on line\n"); |
| 348 | goto err; |
| 349 | } |
| 350 | *(bp++) = atoi(p); |
| 351 | } else { |
| 352 | fprintf(stderr, "miditool: ignoring unknown event %s\n", p); |
| 353 | } |
| 354 | } else if(!strcmp(p, "tempo")) { |
| 355 | *(bp++) = 0xff; |
| 356 | *(bp++) = 0x51; |
| 357 | putv(3, 0); |
| 358 | if((p = strtok(NULL, " ")) == NULL) { |
| 359 | fprintf(stderr, "miditool: tempo line without tempo\n"); |
| 360 | goto err; |
| 361 | } |
| 362 | putb(atoi(p), 3); |
| 363 | } else if(!strcmp(p, "text")) { |
| 364 | } else if(!strcmp(p, "end")) { |
| 365 | *(bp++) = 0xff; |
| 366 | *(bp++) = 0x2f; |
| 367 | putv(0, 0); |
| 368 | } else { |
| 369 | fprintf(stderr, "miditool: ignoring unknown command %s\n", p); |
| 370 | } |
| 371 | } |
| 372 | return(buf); |
| 373 | |
| 374 | err: |
| 375 | free(buf); |
| 376 | return(NULL); |
| 377 | } |
| 378 | |
| 379 | int main(int argc, char **argv) |
| 380 | { |
| 381 | FILE *in, *out; |
| 382 | char *cmd; |
| 383 | |
| 384 | if(argc < 2) { |
| 385 | fprintf(stderr, "usage: miditool command (see `miditool help' for a list of commands)\n"); |
| 386 | exit(1); |
| 387 | } |
| 388 | cmd = argv[1]; |
| 389 | argc--; argv++; |
| 390 | if(!strcmp(cmd, "help")) { |
| 391 | printf("commands:\n"); |
| 392 | printf("\tdump\tDumps a MIDI file to text format\n"); |
| 393 | printf("\tconsh\tConstructs a header chunk\n"); |
| 394 | } else if(!strcmp(cmd, "consh")) { |
| 395 | if(argc < 4) { |
| 396 | fprintf(stderr, "usage: miditool consh TYPE NTRACKS RES\n"); |
| 397 | exit(1); |
| 398 | } |
| 399 | out = stdout; |
| 400 | fputs("MThd", out); |
| 401 | fputl(6, out); |
| 402 | fputus(atoi(argv[1]), out); |
| 403 | fputus(atoi(argv[2]), out); |
| 404 | fputus(atoi(argv[3]), out); |
| 405 | } else if(!strcmp(cmd, "dump")) { |
| 406 | in = stdin; |
| 407 | if(argc > 1) { |
| 408 | if((in = fopen(argv[1], "r")) == NULL) { |
| 409 | perror(argv[1]); |
| 410 | exit(1); |
| 411 | } |
| 412 | } |
| 413 | while(!feof(in)) { |
| 414 | dumpchunk(in, stdout); |
| 415 | } |
| 416 | } |
| 417 | return(0); |
| 418 | } |