| File: | build-analysis/../src/plugins/mp4/mp4ff/mp4tagupdate.c |
| Warning: | line 452, column 22 Value stored to 'size' is never read |
| 1 | #include <stdlib.h> |
| 2 | #include <string.h> |
| 3 | #include "mp4ffint.h" |
| 4 | |
| 5 | #ifdef USE_TAGGING1 |
| 6 | |
| 7 | uint32_t fix_byte_order_32(uint32_t src) |
| 8 | { |
| 9 | uint32_t result; |
| 10 | uint32_t a, b, c, d; |
| 11 | int8_t data[4]; |
| 12 | |
| 13 | memcpy(data,&src,sizeof(src)); |
| 14 | a = (uint8_t)data[0]; |
| 15 | b = (uint8_t)data[1]; |
| 16 | c = (uint8_t)data[2]; |
| 17 | d = (uint8_t)data[3]; |
| 18 | |
| 19 | result = (a<<24) | (b<<16) | (c<<8) | d; |
| 20 | return (uint32_t)result; |
| 21 | } |
| 22 | |
| 23 | uint16_t fix_byte_order_16(uint16_t src) |
| 24 | { |
| 25 | uint16_t result; |
| 26 | uint16_t a, b; |
| 27 | int8_t data[2]; |
| 28 | |
| 29 | memcpy(data,&src,sizeof(src)); |
| 30 | a = (uint8_t)data[0]; |
| 31 | b = (uint8_t)data[1]; |
| 32 | |
| 33 | result = (a<<8) | b; |
| 34 | return (uint16_t)result; |
| 35 | } |
| 36 | |
| 37 | |
| 38 | typedef struct |
| 39 | { |
| 40 | void * data; |
| 41 | unsigned written; |
| 42 | unsigned allocated; |
| 43 | unsigned error; |
| 44 | } membuffer; |
| 45 | |
| 46 | unsigned membuffer_write(membuffer * buf,const void * ptr,unsigned bytes) |
| 47 | { |
| 48 | unsigned dest_size = buf->written + bytes; |
| 49 | |
| 50 | if (buf->error) return 0; |
| 51 | if (dest_size > buf->allocated) |
| 52 | { |
| 53 | do |
| 54 | { |
| 55 | buf->allocated <<= 1; |
| 56 | } while(dest_size > buf->allocated); |
| 57 | |
| 58 | { |
| 59 | void * newptr = realloc(buf->data,buf->allocated); |
| 60 | if (newptr==0) |
| 61 | { |
| 62 | free(buf->data); |
| 63 | buf->data = 0; |
| 64 | buf->error = 1; |
| 65 | return 0; |
| 66 | } |
| 67 | buf->data = newptr; |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | if (ptr) memcpy((char*)buf->data + buf->written,ptr,bytes); |
| 72 | buf->written += bytes; |
| 73 | return bytes; |
| 74 | } |
| 75 | |
| 76 | #define membuffer_write_datamembuffer_write membuffer_write |
| 77 | |
| 78 | unsigned membuffer_write_int32(membuffer * buf,uint32_t data) |
| 79 | { |
| 80 | uint8_t temp[4] = {(uint8_t)(data>>24),(uint8_t)(data>>16),(uint8_t)(data>>8),(uint8_t)data}; |
| 81 | return membuffer_write_datamembuffer_write(buf,temp,4); |
| 82 | } |
| 83 | |
| 84 | unsigned membuffer_write_int24(membuffer * buf,uint32_t data) |
| 85 | { |
| 86 | uint8_t temp[3] = {(uint8_t)(data>>16),(uint8_t)(data>>8),(uint8_t)data}; |
| 87 | return membuffer_write_datamembuffer_write(buf,temp,3); |
| 88 | } |
| 89 | |
| 90 | unsigned membuffer_write_int16(membuffer * buf,uint16_t data) |
| 91 | { |
| 92 | uint8_t temp[2] = {(uint8_t)(data>>8),(uint8_t)data}; |
| 93 | return membuffer_write_datamembuffer_write(buf,temp,2); |
| 94 | } |
| 95 | |
| 96 | unsigned membuffer_write_atom_name(membuffer * buf,const char * data) |
| 97 | { |
| 98 | return membuffer_write_datamembuffer_write(buf,data,4)==4 ? 1 : 0; |
| 99 | } |
| 100 | |
| 101 | void membuffer_write_atom(membuffer * buf,const char * name,unsigned size,const void * data) |
| 102 | { |
| 103 | membuffer_write_int32(buf,size + 8); |
| 104 | membuffer_write_atom_name(buf,name); |
| 105 | membuffer_write_datamembuffer_write(buf,data,size); |
| 106 | } |
| 107 | |
| 108 | unsigned membuffer_write_string(membuffer * buf,const char * data) |
| 109 | { |
| 110 | return membuffer_write_datamembuffer_write(buf,data,strlen(data)); |
| 111 | } |
| 112 | |
| 113 | unsigned membuffer_write_int8(membuffer * buf,uint8_t data) |
| 114 | { |
| 115 | return membuffer_write_datamembuffer_write(buf,&data,1); |
| 116 | } |
| 117 | |
| 118 | void * membuffer_get_ptr(const membuffer * buf) |
| 119 | { |
| 120 | return buf->data; |
| 121 | } |
| 122 | |
| 123 | unsigned membuffer_get_size(const membuffer * buf) |
| 124 | { |
| 125 | return buf->written; |
| 126 | } |
| 127 | |
| 128 | unsigned membuffer_error(const membuffer * buf) |
| 129 | { |
| 130 | return buf->error; |
| 131 | } |
| 132 | |
| 133 | void membuffer_set_error(membuffer * buf) {buf->error = 1;} |
| 134 | |
| 135 | unsigned membuffer_transfer_from_file(membuffer * buf,mp4ff_t * src,unsigned bytes) |
| 136 | { |
| 137 | unsigned oldsize; |
| 138 | void * bufptr; |
| 139 | |
| 140 | oldsize = membuffer_get_size(buf); |
| 141 | if (membuffer_write_datamembuffer_write(buf,0,bytes) != bytes) return 0; |
| 142 | |
| 143 | bufptr = membuffer_get_ptr(buf); |
| 144 | if (bufptr==0) return 0; |
| 145 | |
| 146 | if ((unsigned)mp4ff_read_data(src,(uint8_t *)bufptr + oldsize,bytes)!=bytes) |
| 147 | { |
| 148 | membuffer_set_error(buf); |
| 149 | return 0; |
| 150 | } |
| 151 | |
| 152 | return bytes; |
| 153 | } |
| 154 | |
| 155 | |
| 156 | membuffer * membuffer_create(void) |
| 157 | { |
| 158 | const unsigned initial_size = 256; |
| 159 | |
| 160 | membuffer * buf = (membuffer *) malloc(sizeof(membuffer)); |
| 161 | buf->data = malloc(initial_size); |
| 162 | buf->written = 0; |
| 163 | buf->allocated = initial_size; |
| 164 | buf->error = buf->data == 0 ? 1 : 0; |
| 165 | |
| 166 | return buf; |
| 167 | } |
| 168 | |
| 169 | void membuffer_free(membuffer * buf) |
| 170 | { |
| 171 | if (buf->data) free(buf->data); |
| 172 | free(buf); |
| 173 | } |
| 174 | |
| 175 | void * membuffer_detach(membuffer * buf) |
| 176 | { |
| 177 | void * ret; |
| 178 | |
| 179 | if (buf->error) return 0; |
| 180 | |
| 181 | ret = realloc(buf->data,buf->written); |
| 182 | |
| 183 | if (ret == 0) free(buf->data); |
| 184 | |
| 185 | buf->data = 0; |
| 186 | buf->error = 1; |
| 187 | |
| 188 | return ret; |
| 189 | } |
| 190 | |
| 191 | #if 0 |
| 192 | /* metadata tag structure */ |
| 193 | typedef struct |
| 194 | { |
| 195 | char *item; |
| 196 | char *value; |
| 197 | } mp4ff_tag_t; |
| 198 | |
| 199 | /* metadata list structure */ |
| 200 | typedef struct |
| 201 | { |
| 202 | mp4ff_tag_t *tags; |
| 203 | uint32_t count; |
| 204 | } mp4ff_metadata_t; |
| 205 | #endif |
| 206 | |
| 207 | typedef struct |
| 208 | { |
| 209 | const char * atom; |
| 210 | const char * name; |
| 211 | } stdmeta_entry; |
| 212 | |
| 213 | static stdmeta_entry stdmetas[] = |
| 214 | { |
| 215 | {"\xA9" "nam","title"}, |
| 216 | {"\xA9" "ART","artist"}, |
| 217 | {"\xA9" "wrt","writer"}, |
| 218 | {"\xA9" "alb","album"}, |
| 219 | {"\xA9" "day","date"}, |
| 220 | {"\xA9" "too","tool"}, |
| 221 | {"\xA9" "cmt","comment"}, |
| 222 | // {"\xA9" "gen","genre"}, |
| 223 | {"cpil","compilation"}, |
| 224 | // {"trkn","track"}, |
| 225 | // {"disk","disc"}, |
| 226 | // {"gnre","genre"}, |
| 227 | {"covr","cover"}, |
| 228 | /* added by AJS */ |
| 229 | {"aART","album_artist"}, |
| 230 | }; |
| 231 | |
| 232 | |
| 233 | static const char* find_standard_meta(const char * name) //returns atom name if found, 0 if not |
| 234 | { |
| 235 | unsigned n; |
| 236 | for(n=0;n<sizeof(stdmetas)/sizeof(stdmetas[0]);n++) |
| 237 | { |
| 238 | if (!stricmpstrcasecmp(name,stdmetas[n].name)) return stdmetas[n].atom; |
| 239 | } |
| 240 | return 0; |
| 241 | } |
| 242 | |
| 243 | static void membuffer_write_track_tag(membuffer * buf,const char * name,uint32_t index,uint32_t total) |
| 244 | { |
| 245 | membuffer_write_int32(buf,8 /*atom header*/ + 8 /*data atom header*/ + 8 /*flags + reserved*/ + 8 /*actual data*/ ); |
| 246 | membuffer_write_atom_name(buf,name); |
| 247 | membuffer_write_int32(buf,8 /*data atom header*/ + 8 /*flags + reserved*/ + 8 /*actual data*/ ); |
| 248 | membuffer_write_atom_name(buf,"data"); |
| 249 | membuffer_write_int32(buf,0);//flags |
| 250 | membuffer_write_int32(buf,0);//reserved |
| 251 | membuffer_write_int16(buf,0); |
| 252 | membuffer_write_int16(buf,(uint16_t)index);//track number |
| 253 | membuffer_write_int16(buf,(uint16_t)total);//total tracks |
| 254 | membuffer_write_int16(buf,0); |
| 255 | } |
| 256 | |
| 257 | static void membuffer_write_int16_tag(membuffer * buf,const char * name,uint16_t value) |
| 258 | { |
| 259 | membuffer_write_int32(buf,8 /*atom header*/ + 8 /*data atom header*/ + 8 /*flags + reserved*/ + 2 /*actual data*/ ); |
| 260 | membuffer_write_atom_name(buf,name); |
| 261 | membuffer_write_int32(buf,8 /*data atom header*/ + 8 /*flags + reserved*/ + 2 /*actual data*/ ); |
| 262 | membuffer_write_atom_name(buf,"data"); |
| 263 | membuffer_write_int32(buf,0);//flags |
| 264 | membuffer_write_int32(buf,0);//reserved |
| 265 | membuffer_write_int16(buf,value);//value |
| 266 | } |
| 267 | |
| 268 | static void membuffer_write_std_tag(membuffer * buf,const char * name,const char * value) |
| 269 | { |
| 270 | /* added by AJS */ |
| 271 | uint32_t flags = 1; |
| 272 | |
| 273 | /* special check for compilation flag */ |
| 274 | if ( strcmp(name, "cpil") == 0) |
| 275 | { |
| 276 | flags = 21; |
| 277 | } |
| 278 | |
| 279 | membuffer_write_int32(buf,8 /*atom header*/ + 8 /*data atom header*/ + 8 /*flags + reserved*/ + strlen(value) ); |
| 280 | membuffer_write_atom_name(buf,name); |
| 281 | membuffer_write_int32(buf,8 /*data atom header*/ + 8 /*flags + reserved*/ + strlen(value)); |
| 282 | membuffer_write_atom_name(buf,"data"); |
| 283 | membuffer_write_int32(buf,flags);//flags |
| 284 | membuffer_write_int32(buf,0);//reserved |
| 285 | membuffer_write_datamembuffer_write(buf,value,strlen(value)); |
| 286 | } |
| 287 | |
| 288 | static void membuffer_write_custom_tag(membuffer * buf,const char * name,const char * value) |
| 289 | { |
| 290 | membuffer_write_int32(buf,8 /*atom header*/ + 0x1C /*weirdo itunes atom*/ + 12 /*name atom header*/ + strlen(name) + 16 /*data atom header + flags*/ + strlen(value) ); |
| 291 | membuffer_write_atom_name(buf,"----"); |
| 292 | membuffer_write_int32(buf,0x1C);//weirdo itunes atom |
| 293 | membuffer_write_atom_name(buf,"mean"); |
| 294 | membuffer_write_int32(buf,0); |
| 295 | membuffer_write_datamembuffer_write(buf,"com.apple.iTunes",16); |
| 296 | membuffer_write_int32(buf,12 + strlen(name)); |
| 297 | membuffer_write_atom_name(buf,"name"); |
| 298 | membuffer_write_int32(buf,0); |
| 299 | membuffer_write_datamembuffer_write(buf,name,strlen(name)); |
| 300 | membuffer_write_int32(buf,8 /*data atom header*/ + 8 /*flags + reserved*/ + strlen(value)); |
| 301 | membuffer_write_atom_name(buf,"data"); |
| 302 | membuffer_write_int32(buf,1);//flags |
| 303 | membuffer_write_int32(buf,0);//reserved |
| 304 | membuffer_write_datamembuffer_write(buf,value,strlen(value)); |
| 305 | |
| 306 | } |
| 307 | |
| 308 | static uint32_t myatoi(const char * param) |
| 309 | { |
| 310 | return param ? atoi(param) : 0; |
| 311 | } |
| 312 | |
| 313 | static uint32_t create_ilst(const mp4ff_metadata_t * data,void ** out_buffer,uint32_t * out_size) |
| 314 | { |
| 315 | membuffer * buf = membuffer_create(); |
| 316 | unsigned metaptr; |
| 317 | char * mask = (char*)malloc(data->count); |
| 318 | memset(mask,0,data->count); |
| 319 | |
| 320 | { |
| 321 | const char * tracknumber_ptr = 0, * totaltracks_ptr = 0; |
| 322 | const char * discnumber_ptr = 0, * totaldiscs_ptr = 0; |
| 323 | const char * genre_ptr = 0, * tempo_ptr = 0; |
| 324 | for(metaptr = 0; metaptr < data->count; metaptr++) |
| 325 | { |
| 326 | mp4ff_tag_t * tag = &data->tags[metaptr]; |
| 327 | if (!stricmpstrcasecmp(tag->item,"tracknumber") || !stricmpstrcasecmp(tag->item,"track")) |
| 328 | { |
| 329 | if (tracknumber_ptr==0) tracknumber_ptr = tag->value; |
| 330 | mask[metaptr] = 1; |
| 331 | } |
| 332 | else if (!stricmpstrcasecmp(tag->item,"totaltracks")) |
| 333 | { |
| 334 | if (totaltracks_ptr==0) totaltracks_ptr = tag->value; |
| 335 | mask[metaptr] = 1; |
| 336 | } |
| 337 | else if (!stricmpstrcasecmp(tag->item,"discnumber") || !stricmpstrcasecmp(tag->item,"disc")) |
| 338 | { |
| 339 | if (discnumber_ptr==0) discnumber_ptr = tag->value; |
| 340 | mask[metaptr] = 1; |
| 341 | } |
| 342 | else if (!stricmpstrcasecmp(tag->item,"totaldiscs")) |
| 343 | { |
| 344 | if (totaldiscs_ptr==0) totaldiscs_ptr = tag->value; |
| 345 | mask[metaptr] = 1; |
| 346 | } |
| 347 | else if (!stricmpstrcasecmp(tag->item,"genre")) |
| 348 | { |
| 349 | if (genre_ptr==0) genre_ptr = tag->value; |
| 350 | mask[metaptr] = 1; |
| 351 | } |
| 352 | else if (!stricmpstrcasecmp(tag->item,"tempo")) |
| 353 | { |
| 354 | if (tempo_ptr==0) tempo_ptr = tag->value; |
| 355 | mask[metaptr] = 1; |
| 356 | } |
| 357 | |
| 358 | } |
| 359 | |
| 360 | if (tracknumber_ptr) membuffer_write_track_tag(buf,"trkn",myatoi(tracknumber_ptr),myatoi(totaltracks_ptr)); |
| 361 | if (discnumber_ptr) membuffer_write_track_tag(buf,"disk",myatoi(discnumber_ptr),myatoi(totaldiscs_ptr)); |
| 362 | if (tempo_ptr) membuffer_write_int16_tag(buf,"tmpo",(uint16_t)myatoi(tempo_ptr)); |
| 363 | |
| 364 | if (genre_ptr) |
| 365 | { |
| 366 | uint32_t index = mp4ff_meta_genre_to_index(genre_ptr); |
| 367 | if (index==0) |
| 368 | membuffer_write_std_tag(buf,"©gen",genre_ptr); |
| 369 | else |
| 370 | membuffer_write_int16_tag(buf,"gnre",(uint16_t)index); |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | for(metaptr = 0; metaptr < data->count; metaptr++) |
| 375 | { |
| 376 | if (!mask[metaptr]) |
| 377 | { |
| 378 | mp4ff_tag_t * tag = &data->tags[metaptr]; |
| 379 | const char * std_meta_atom = find_standard_meta(tag->item); |
| 380 | if (std_meta_atom) |
| 381 | { |
| 382 | membuffer_write_std_tag(buf,std_meta_atom,tag->value); |
| 383 | } |
| 384 | else |
| 385 | { |
| 386 | membuffer_write_custom_tag(buf,tag->item,tag->value); |
| 387 | } |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | free(mask); |
| 392 | |
| 393 | if (membuffer_error(buf)) |
| 394 | { |
| 395 | membuffer_free(buf); |
| 396 | return 0; |
| 397 | } |
| 398 | |
| 399 | *out_size = membuffer_get_size(buf); |
| 400 | *out_buffer = membuffer_detach(buf); |
| 401 | membuffer_free(buf); |
| 402 | |
| 403 | return 1; |
| 404 | } |
| 405 | |
| 406 | static uint32_t find_atom(mp4ff_t * f,uint64_t base,uint32_t size,const char * name) |
| 407 | { |
| 408 | uint32_t remaining = size; |
| 409 | uint64_t atom_offset = base; |
| 410 | for(;;) |
| 411 | { |
| 412 | uint8_t atom_name[4]; |
| 413 | uint32_t atom_size; |
| 414 | |
| 415 | mp4ff_set_position(f,atom_offset); |
| 416 | |
| 417 | if (remaining < 8) break; |
| 418 | atom_size = mp4ff_read_int32(f); |
| 419 | if (atom_size > remaining || atom_size < 8) break; |
| 420 | mp4ff_read_data(f,atom_name,4); |
| 421 | |
| 422 | if (!memcmp(atom_name,name,4)) |
| 423 | { |
| 424 | mp4ff_set_position(f,atom_offset); |
| 425 | return 1; |
| 426 | } |
| 427 | |
| 428 | remaining -= atom_size; |
| 429 | atom_offset += atom_size; |
| 430 | } |
| 431 | return 0; |
| 432 | } |
| 433 | |
| 434 | static uint32_t find_atom_v2(mp4ff_t * f,uint64_t base,uint32_t size,const char * name,uint32_t extraheaders,const char * name_inside) |
| 435 | { |
| 436 | uint64_t first_base = (uint64_t)(-1); |
| 437 | while(find_atom(f,base,size,name))//try to find atom <name> with atom <name_inside> in it |
| 438 | { |
| 439 | uint64_t mybase = mp4ff_position(f); |
| 440 | uint32_t mysize = mp4ff_read_int32(f); |
| 441 | |
| 442 | if (first_base == (uint64_t)(-1)) first_base = mybase; |
| 443 | |
| 444 | if (mysize < 8 + extraheaders) break; |
| 445 | |
| 446 | if (find_atom(f,mybase+(8+extraheaders),mysize-(8+extraheaders),name_inside)) |
| 447 | { |
| 448 | mp4ff_set_position(f,mybase); |
| 449 | return 2; |
| 450 | } |
| 451 | base += mysize; |
| 452 | if (size<=mysize) {size=0;break;} |
Value stored to 'size' is never read | |
| 453 | size -= mysize; |
| 454 | } |
| 455 | |
| 456 | if (first_base != (uint64_t)(-1))//wanted atom inside not found |
| 457 | { |
| 458 | mp4ff_set_position(f,first_base); |
| 459 | return 1; |
| 460 | } |
| 461 | else return 0; |
| 462 | } |
| 463 | |
| 464 | static uint32_t create_meta(const mp4ff_metadata_t * data,void ** out_buffer,uint32_t * out_size) |
| 465 | { |
| 466 | membuffer * buf; |
| 467 | uint32_t ilst_size; |
| 468 | void * ilst_buffer; |
| 469 | |
| 470 | if (!create_ilst(data,&ilst_buffer,&ilst_size)) return 0; |
| 471 | |
| 472 | buf = membuffer_create(); |
| 473 | |
| 474 | membuffer_write_int32(buf,0); |
| 475 | membuffer_write_atom(buf,"ilst",ilst_size,ilst_buffer); |
| 476 | free(ilst_buffer); |
| 477 | |
| 478 | *out_size = membuffer_get_size(buf); |
| 479 | *out_buffer = membuffer_detach(buf); |
| 480 | membuffer_free(buf); |
| 481 | return 1; |
| 482 | } |
| 483 | |
| 484 | static uint32_t create_udta(const mp4ff_metadata_t * data,void ** out_buffer,uint32_t * out_size) |
| 485 | { |
| 486 | membuffer * buf; |
| 487 | uint32_t meta_size; |
| 488 | void * meta_buffer; |
| 489 | |
| 490 | if (!create_meta(data,&meta_buffer,&meta_size)) return 0; |
| 491 | |
| 492 | buf = membuffer_create(); |
| 493 | |
| 494 | membuffer_write_atom(buf,"meta",meta_size,meta_buffer); |
| 495 | |
| 496 | free(meta_buffer); |
| 497 | |
| 498 | *out_size = membuffer_get_size(buf); |
| 499 | *out_buffer = membuffer_detach(buf); |
| 500 | membuffer_free(buf); |
| 501 | return 1; |
| 502 | } |
| 503 | |
| 504 | static uint32_t modify_moov(mp4ff_t * f,const mp4ff_metadata_t * data,void ** out_buffer,uint32_t * out_size) |
| 505 | { |
| 506 | uint64_t total_base = f->moov_offset + 8; |
| 507 | uint32_t total_size = (uint32_t)(f->moov_size - 8); |
| 508 | |
| 509 | uint64_t udta_offset,meta_offset,ilst_offset; |
| 510 | uint32_t udta_size, meta_size, ilst_size; |
| 511 | |
| 512 | uint32_t new_ilst_size; |
| 513 | void * new_ilst_buffer; |
| 514 | |
| 515 | uint8_t * p_out; |
| 516 | int32_t size_delta; |
| 517 | |
| 518 | |
| 519 | if (!find_atom_v2(f,total_base,total_size,"udta",0,"meta")) |
| 520 | { |
| 521 | membuffer * buf; |
| 522 | void * new_udta_buffer; |
| 523 | uint32_t new_udta_size; |
| 524 | if (!create_udta(data,&new_udta_buffer,&new_udta_size)) return 0; |
| 525 | |
| 526 | buf = membuffer_create(); |
| 527 | mp4ff_set_position(f,total_base); |
| 528 | membuffer_transfer_from_file(buf,f,total_size); |
| 529 | |
| 530 | membuffer_write_atom(buf,"udta",new_udta_size,new_udta_buffer); |
| 531 | |
| 532 | free(new_udta_buffer); |
| 533 | |
| 534 | *out_size = membuffer_get_size(buf); |
| 535 | *out_buffer = membuffer_detach(buf); |
| 536 | membuffer_free(buf); |
| 537 | return 1; |
| 538 | } |
| 539 | else |
| 540 | { |
| 541 | udta_offset = mp4ff_position(f); |
| 542 | udta_size = mp4ff_read_int32(f); |
| 543 | if (!find_atom_v2(f,udta_offset+8,udta_size-8,"meta",4,"ilst")) |
| 544 | { |
| 545 | membuffer * buf; |
| 546 | void * new_meta_buffer; |
| 547 | uint32_t new_meta_size; |
| 548 | if (!create_meta(data,&new_meta_buffer,&new_meta_size)) return 0; |
| 549 | |
| 550 | buf = membuffer_create(); |
| 551 | mp4ff_set_position(f,total_base); |
| 552 | membuffer_transfer_from_file(buf,f,(uint32_t)(udta_offset - total_base)); |
| 553 | |
| 554 | membuffer_write_int32(buf,udta_size + 8 + new_meta_size); |
| 555 | membuffer_write_atom_name(buf,"udta"); |
| 556 | membuffer_transfer_from_file(buf,f,udta_size); |
| 557 | |
| 558 | membuffer_write_atom(buf,"meta",new_meta_size,new_meta_buffer); |
| 559 | free(new_meta_buffer); |
| 560 | |
| 561 | *out_size = membuffer_get_size(buf); |
| 562 | *out_buffer = membuffer_detach(buf); |
| 563 | membuffer_free(buf); |
| 564 | return 1; |
| 565 | } |
| 566 | meta_offset = mp4ff_position(f); |
| 567 | meta_size = mp4ff_read_int32(f); |
| 568 | if (!find_atom(f,meta_offset+12,meta_size-12,"ilst")) return 0;//shouldn't happen, find_atom_v2 above takes care of it |
| 569 | ilst_offset = mp4ff_position(f); |
| 570 | ilst_size = mp4ff_read_int32(f); |
| 571 | |
| 572 | if (!create_ilst(data,&new_ilst_buffer,&new_ilst_size)) return 0; |
| 573 | |
| 574 | size_delta = new_ilst_size - (ilst_size - 8); |
| 575 | |
| 576 | *out_size = total_size + size_delta; |
| 577 | *out_buffer = malloc(*out_size); |
| 578 | if (*out_buffer == 0) |
| 579 | { |
| 580 | free(new_ilst_buffer); |
| 581 | return 0; |
| 582 | } |
| 583 | |
| 584 | p_out = (uint8_t*)*out_buffer; |
| 585 | |
| 586 | mp4ff_set_position(f,total_base); |
| 587 | mp4ff_read_data(f,p_out,(uint32_t)(udta_offset - total_base )); p_out += (uint32_t)(udta_offset - total_base ); |
| 588 | *(uint32_t*)p_out = fix_byte_order_32(mp4ff_read_int32(f) + size_delta); p_out += 4; |
| 589 | mp4ff_read_data(f,p_out,4); p_out += 4; |
| 590 | mp4ff_read_data(f,p_out,(uint32_t)(meta_offset - udta_offset - 8)); p_out += (uint32_t)(meta_offset - udta_offset - 8); |
| 591 | *(uint32_t*)p_out = fix_byte_order_32(mp4ff_read_int32(f) + size_delta); p_out += 4; |
| 592 | mp4ff_read_data(f,p_out,4); p_out += 4; |
| 593 | mp4ff_read_data(f,p_out,(uint32_t)(ilst_offset - meta_offset - 8)); p_out += (uint32_t)(ilst_offset - meta_offset - 8); |
| 594 | *(uint32_t*)p_out = fix_byte_order_32(mp4ff_read_int32(f) + size_delta); p_out += 4; |
| 595 | mp4ff_read_data(f,p_out,4); p_out += 4; |
| 596 | |
| 597 | memcpy(p_out,new_ilst_buffer,new_ilst_size); |
| 598 | p_out += new_ilst_size; |
| 599 | |
| 600 | mp4ff_set_position(f,ilst_offset + ilst_size); |
| 601 | mp4ff_read_data(f,p_out,(uint32_t)(total_size - (ilst_offset - total_base) - ilst_size)); |
| 602 | |
| 603 | free(new_ilst_buffer); |
| 604 | } |
| 605 | return 1; |
| 606 | |
| 607 | } |
| 608 | |
| 609 | int32_t mp4ff_meta_update(mp4ff_callback_t *f,const mp4ff_metadata_t * data) |
| 610 | { |
| 611 | void * new_moov_data; |
| 612 | uint32_t new_moov_size; |
| 613 | |
| 614 | mp4ff_t *ff = malloc(sizeof(mp4ff_t)); |
| 615 | |
| 616 | memset(ff, 0, sizeof(mp4ff_t)); |
| 617 | ff->stream = f; |
| 618 | mp4ff_set_position(ff,0); |
| 619 | |
| 620 | parse_atoms(ff,1); |
| 621 | |
| 622 | |
| 623 | if (!modify_moov(ff,data,&new_moov_data,&new_moov_size)) |
| 624 | { |
| 625 | mp4ff_close(ff); |
| 626 | return 0; |
| 627 | } |
| 628 | |
| 629 | /* copy moov atom to end of the file */ |
| 630 | if (ff->last_atom != ATOM_MOOV1) |
| 631 | { |
| 632 | uint8_t *free_data = (uint8_t *)"free"; |
| 633 | |
| 634 | /* rename old moov to free */ |
| 635 | mp4ff_set_position(ff, ff->moov_offset + 4); |
| 636 | mp4ff_write_data(ff, free_data, 4); |
| 637 | |
| 638 | mp4ff_set_position(ff, ff->file_size); |
| 639 | mp4ff_write_int32(ff,new_moov_size + 8); |
| 640 | mp4ff_write_data(ff,(uint8_t *)"moov",4); |
| 641 | mp4ff_write_data(ff, new_moov_data, new_moov_size); |
| 642 | } |
| 643 | else |
| 644 | { |
| 645 | mp4ff_set_position(ff, ff->moov_offset); |
| 646 | mp4ff_write_int32(ff,new_moov_size + 8); |
| 647 | mp4ff_write_data(ff,(uint8_t *)"moov",4); |
| 648 | mp4ff_write_data(ff, new_moov_data, new_moov_size); |
| 649 | } |
| 650 | |
| 651 | mp4ff_truncate(ff); |
| 652 | |
| 653 | mp4ff_close(ff); |
| 654 | return 1; |
| 655 | } |
| 656 | #endif |