src/mp4ff/.svn/text-base/mp4tagupdate.c.svn-base

   1 #include <stdlib.h>
   2 #include <string.h>
   3 #include "mp4ffint.h"
   4
   5 #ifdef USE_TAGGING
   6
   7 static 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 static 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 static 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_data membuffer_write
  77
  78 static 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_data(buf,temp,4);
  82 }
  83
  84 static 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_data(buf,temp,3);
  88 }
  89
  90 static 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_data(buf,temp,2);
  94 }
  95
  96 static unsigned membuffer_write_atom_name(membuffer * buf,const char * data)
  97 {
  98         return membuffer_write_data(buf,data,4)==4 ? 1 : 0;
  99 }
 100
 101 static 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_data(buf,data,size);
 106 }
 107
 108 static unsigned membuffer_write_string(membuffer * buf,const char * data)
 109 {
 110         return membuffer_write_data(buf,data,strlen(data));
 111 }
 112
 113 static unsigned membuffer_write_int8(membuffer * buf,uint8_t data)
 114 {
 115         return membuffer_write_data(buf,&data,1);
 116 }
 117
 118 static void * membuffer_get_ptr(const membuffer * buf)
 119 {
 120         return buf->data;
 121 }
 122
 123 static unsigned membuffer_get_size(const membuffer * buf)
 124 {
 125         return buf->written;
 126 }
 127
 128 static unsigned membuffer_error(const membuffer * buf)
 129 {
 130         return buf->error;
 131 }
 132
 133 static void membuffer_set_error(membuffer * buf) {buf->error = 1;}
 134
 135 static 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_data(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,(char*)bufptr + oldsize,bytes)!=bytes)
 147         {
 148                 membuffer_set_error(buf);
 149                 return 0;
 150         }
 151
 152         return bytes;
 153 }
 154
 155
 156 static membuffer * membuffer_create()
 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 static void membuffer_free(membuffer * buf)
 170 {
 171         if (buf->data) free(buf->data);
 172         free(buf);
 173 }
 174
 175 static 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         {"©nam","title"},
 216         {"©ART","artist"},
 217         {"©wrt","writer"},
 218         {"©alb","album"},
 219         {"©day","date"},
 220         {"©too","tool"},
 221         {"©cmt","comment"},
 222 //      {"©gen","genre"},
 223         {"cpil","compilation"},
 224 //      {"trkn","track"},
 225 //      {"disk","disc"},
 226 //      {"gnre","genre"},
 227         {"covr","cover"},
 228 };
 229
 230
 231 static const char* find_standard_meta(const char * name) //returns atom name if found, 0 if not
 232 {
 233         unsigned n;
 234         for(n=0;n<sizeof(stdmetas)/sizeof(stdmetas[0]);n++)
 235         {
 236                 if (!stricmp(name,stdmetas[n].name)) return stdmetas[n].atom;
 237         }
 238     return 0;
 239 }
 240
 241 static void membuffer_write_track_tag(membuffer * buf,const char * name,uint32_t index,uint32_t total)
 242 {
 243         membuffer_write_int32(buf,8 /*atom header*/ + 8 /*data atom header*/ + 8 /*flags + reserved*/ + 8 /*actual data*/ );
 244         membuffer_write_atom_name(buf,name);
 245         membuffer_write_int32(buf,8 /*data atom header*/ + 8 /*flags + reserved*/ + 8 /*actual data*/ );
 246         membuffer_write_atom_name(buf,"data");
 247         membuffer_write_int32(buf,0);//flags
 248         membuffer_write_int32(buf,0);//reserved
 249         membuffer_write_int16(buf,0);
 250         membuffer_write_int16(buf,(uint16_t)index);//track number
 251         membuffer_write_int16(buf,(uint16_t)total);//total tracks
 252         membuffer_write_int16(buf,0);
 253 }
 254
 255 static void membuffer_write_int16_tag(membuffer * buf,const char * name,uint16_t value)
 256 {
 257         membuffer_write_int32(buf,8 /*atom header*/ + 8 /*data atom header*/ + 8 /*flags + reserved*/ + 2 /*actual data*/ );
 258         membuffer_write_atom_name(buf,name);
 259         membuffer_write_int32(buf,8 /*data atom header*/ + 8 /*flags + reserved*/ + 2 /*actual data*/ );
 260         membuffer_write_atom_name(buf,"data");
 261         membuffer_write_int32(buf,0);//flags
 262         membuffer_write_int32(buf,0);//reserved
 263         membuffer_write_int16(buf,value);//value
 264 }
 265
 266 static void membuffer_write_std_tag(membuffer * buf,const char * name,const char * value)
 267 {
 268         membuffer_write_int32(buf,8 /*atom header*/ + 8 /*data atom header*/ + 8 /*flags + reserved*/ + strlen(value) );
 269         membuffer_write_atom_name(buf,name);
 270         membuffer_write_int32(buf,8 /*data atom header*/ + 8 /*flags + reserved*/ + strlen(value));
 271         membuffer_write_atom_name(buf,"data");
 272         membuffer_write_int32(buf,1);//flags
 273         membuffer_write_int32(buf,0);//reserved
 274         membuffer_write_data(buf,value,strlen(value));
 275 }
 276
 277 static void membuffer_write_custom_tag(membuffer * buf,const char * name,const char * value)
 278 {
 279         membuffer_write_int32(buf,8 /*atom header*/ + 0x1C /*weirdo itunes atom*/ + 12 /*name atom header*/ + strlen(name) + 16 /*data atom header + flags*/ + strlen(value) );
 280         membuffer_write_atom_name(buf,"----");
 281         membuffer_write_int32(buf,0x1C);//weirdo itunes atom
 282         membuffer_write_atom_name(buf,"mean");
 283         membuffer_write_int32(buf,0);
 284         membuffer_write_data(buf,"com.apple.iTunes",16);
 285         membuffer_write_int32(buf,12 + strlen(name));
 286         membuffer_write_atom_name(buf,"name");
 287         membuffer_write_int32(buf,0);
 288         membuffer_write_data(buf,name,strlen(name));
 289         membuffer_write_int32(buf,8 /*data atom header*/ + 8 /*flags + reserved*/ + strlen(value));
 290         membuffer_write_atom_name(buf,"data");
 291         membuffer_write_int32(buf,1);//flags
 292         membuffer_write_int32(buf,0);//reserved
 293         membuffer_write_data(buf,value,strlen(value));
 294
 295 }
 296
 297 static uint32_t myatoi(const char * param)
 298 {
 299         return param ? atoi(param) : 0;
 300 }
 301
 302 static uint32_t create_ilst(const mp4ff_metadata_t * data,void ** out_buffer,uint32_t * out_size)
 303 {
 304         membuffer * buf = membuffer_create();
 305         unsigned metaptr;
 306         char * mask = (char*)malloc(data->count);
 307         memset(mask,0,data->count);
 308
 309         {
 310                 const char * tracknumber_ptr = 0, * totaltracks_ptr = 0;
 311                 const char * discnumber_ptr = 0, * totaldiscs_ptr = 0;
 312                 const char * genre_ptr = 0, * tempo_ptr = 0;
 313                 for(metaptr = 0; metaptr < data->count; metaptr++)
 314                 {
 315                         mp4ff_tag_t * tag = &data->tags[metaptr];
 316                         if (!stricmp(tag->item,"tracknumber") || !stricmp(tag->item,"track"))
 317                         {
 318                                 if (tracknumber_ptr==0) tracknumber_ptr = tag->value;
 319                                 mask[metaptr] = 1;
 320                         }
 321                         else if (!stricmp(tag->item,"totaltracks"))
 322                         {
 323                                 if (totaltracks_ptr==0) totaltracks_ptr = tag->value;
 324                                 mask[metaptr] = 1;
 325                         }
 326                         else if (!stricmp(tag->item,"discnumber") || !stricmp(tag->item,"disc"))
 327                         {
 328                                 if (discnumber_ptr==0) discnumber_ptr = tag->value;
 329                                 mask[metaptr] = 1;
 330                         }
 331                         else if (!stricmp(tag->item,"totaldiscs"))
 332                         {
 333                                 if (totaldiscs_ptr==0) totaldiscs_ptr = tag->value;
 334                                 mask[metaptr] = 1;
 335                         }
 336                         else if (!stricmp(tag->item,"genre"))
 337                         {
 338                                 if (genre_ptr==0) genre_ptr = tag->value;
 339                                 mask[metaptr] = 1;
 340                         }
 341                         else if (!stricmp(tag->item,"tempo"))
 342                         {
 343                                 if (tempo_ptr==0) tempo_ptr = tag->value;
 344                                 mask[metaptr] = 1;
 345                         }
 346
 347                 }
 348
 349                 if (tracknumber_ptr) membuffer_write_track_tag(buf,"trkn",myatoi(tracknumber_ptr),myatoi(totaltracks_ptr));
 350                 if (discnumber_ptr) membuffer_write_track_tag(buf,"disk",myatoi(discnumber_ptr),myatoi(totaldiscs_ptr));
 351                 if (tempo_ptr) membuffer_write_int16_tag(buf,"tmpo",(uint16_t)myatoi(tempo_ptr));
 352
 353                 if (genre_ptr)
 354                 {
 355                         uint32_t index = mp4ff_meta_genre_to_index(genre_ptr);
 356                         if (index==0)
 357                                 membuffer_write_std_tag(buf,"©gen",genre_ptr);
 358                         else
 359                                 membuffer_write_int16_tag(buf,"gnre",(uint16_t)index);
 360                 }
 361         }
 362
 363         for(metaptr = 0; metaptr < data->count; metaptr++)
 364         {
 365                 if (!mask[metaptr])
 366                 {
 367                         mp4ff_tag_t * tag = &data->tags[metaptr];
 368                         const char * std_meta_atom = find_standard_meta(tag->item);
 369                         if (std_meta_atom)
 370                         {
 371                                 membuffer_write_std_tag(buf,std_meta_atom,tag->value);
 372                         }
 373                         else
 374                         {
 375                                 membuffer_write_custom_tag(buf,tag->item,tag->value);
 376                         }
 377                 }
 378         }
 379
 380         free(mask);
 381
 382         if (membuffer_error(buf))
 383         {
 384                 membuffer_free(buf);
 385                 return 0;
 386         }
 387
 388         *out_size = membuffer_get_size(buf);
 389         *out_buffer = membuffer_detach(buf);
 390         membuffer_free(buf);
 391
 392         return 1;
 393 }
 394
 395 static uint32_t find_atom(mp4ff_t * f,uint64_t base,uint32_t size,const char * name)
 396 {
 397         uint32_t remaining = size;
 398         uint64_t atom_offset = base;
 399         for(;;)
 400         {
 401                 char atom_name[4];
 402                 uint32_t atom_size;
 403
 404                 mp4ff_set_position(f,atom_offset);
 405
 406                 if (remaining < 8) break;
 407                 atom_size = mp4ff_read_int32(f);
 408                 if (atom_size > remaining || atom_size < 8) break;
 409                 mp4ff_read_data(f,atom_name,4);
 410
 411                 if (!memcmp(atom_name,name,4))
 412                 {
 413                         mp4ff_set_position(f,atom_offset);
 414                         return 1;
 415                 }
 416
 417                 remaining -= atom_size;
 418                 atom_offset += atom_size;
 419         }
 420         return 0;
 421 }
 422
 423 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)
 424 {
 425         uint64_t first_base = (uint64_t)(-1);
 426         while(find_atom(f,base,size,name))//try to find atom <name> with atom <name_inside> in it
 427         {
 428                 uint64_t mybase = mp4ff_position(f);
 429                 uint32_t mysize = mp4ff_read_int32(f);
 430
 431                 if (first_base == (uint64_t)(-1)) first_base = mybase;
 432
 433                 if (mysize < 8 + extraheaders) break;
 434
 435                 if (find_atom(f,mybase+(8+extraheaders),mysize-(8+extraheaders),name_inside))
 436                 {
 437                         mp4ff_set_position(f,mybase);
 438                         return 2;
 439                 }
 440                 base += mysize;
 441                 if (size<=mysize) {size=0;break;}
 442                 size -= mysize;
 443         }
 444
 445         if (first_base != (uint64_t)(-1))//wanted atom inside not found
 446         {
 447                 mp4ff_set_position(f,first_base);
 448                 return 1;
 449         }
 450         else return 0;
 451 }
 452
 453 static uint32_t create_meta(const mp4ff_metadata_t * data,void ** out_buffer,uint32_t * out_size)
 454 {
 455         membuffer * buf;
 456         uint32_t ilst_size;
 457         void * ilst_buffer;
 458
 459         if (!create_ilst(data,&ilst_buffer,&ilst_size)) return 0;
 460
 461         buf = membuffer_create();
 462
 463         membuffer_write_int32(buf,0);
 464         membuffer_write_atom(buf,"ilst",ilst_size,ilst_buffer);
 465         free(ilst_buffer);
 466
 467         *out_size = membuffer_get_size(buf);
 468         *out_buffer = membuffer_detach(buf);
 469         membuffer_free(buf);
 470         return 1;
 471 }
 472
 473 static uint32_t create_udta(const mp4ff_metadata_t * data,void ** out_buffer,uint32_t * out_size)
 474 {
 475         membuffer * buf;
 476         uint32_t meta_size;
 477         void * meta_buffer;
 478
 479         if (!create_meta(data,&meta_buffer,&meta_size)) return 0;
 480
 481         buf = membuffer_create();
 482
 483         membuffer_write_atom(buf,"meta",meta_size,meta_buffer);
 484
 485         free(meta_buffer);
 486
 487         *out_size = membuffer_get_size(buf);
 488         *out_buffer = membuffer_detach(buf);
 489         membuffer_free(buf);
 490         return 1;
 491 }
 492
 493 static uint32_t modify_moov(mp4ff_t * f,const mp4ff_metadata_t * data,void ** out_buffer,uint32_t * out_size)
 494 {
 495         uint64_t total_base = f->moov_offset + 8;
 496         uint32_t total_size = (uint32_t)(f->moov_size - 8);
 497
 498         uint64_t udta_offset,meta_offset,ilst_offset;
 499         uint32_t udta_size,  meta_size,  ilst_size;
 500
 501         uint32_t new_ilst_size;
 502         void * new_ilst_buffer;
 503
 504         uint8_t * p_out;
 505         int32_t size_delta;
 506
 507
 508         if (!find_atom_v2(f,total_base,total_size,"udta",0,"meta"))
 509         {
 510                 membuffer * buf;
 511                 void * new_udta_buffer;
 512                 uint32_t new_udta_size;
 513                 if (!create_udta(data,&new_udta_buffer,&new_udta_size)) return 0;
 514
 515                 buf = membuffer_create();
 516                 mp4ff_set_position(f,total_base);
 517                 membuffer_transfer_from_file(buf,f,total_size);
 518
 519                 membuffer_write_atom(buf,"udta",new_udta_size,new_udta_buffer);
 520
 521                 free(new_udta_buffer);
 522
 523                 *out_size = membuffer_get_size(buf);
 524                 *out_buffer = membuffer_detach(buf);
 525                 membuffer_free(buf);
 526                 return 1;
 527         }
 528         else
 529         {
 530                 udta_offset = mp4ff_position(f);
 531                 udta_size = mp4ff_read_int32(f);
 532                 if (find_atom_v2(f,udta_offset+8,udta_size-8,"meta",4,"ilst")<2)
 533                 {
 534                         membuffer * buf;
 535                         void * new_meta_buffer;
 536                         uint32_t new_meta_size;
 537                         if (!create_meta(data,&new_meta_buffer,&new_meta_size)) return 0;
 538
 539                         buf = membuffer_create();
 540                         mp4ff_set_position(f,total_base);
 541                         membuffer_transfer_from_file(buf,f,(uint32_t)(udta_offset - total_base));
 542
 543                         membuffer_write_int32(buf,udta_size + 8 + new_meta_size);
 544                         membuffer_write_atom_name(buf,"udta");
 545                         membuffer_transfer_from_file(buf,f,udta_size);
 546
 547                         membuffer_write_atom(buf,"meta",new_meta_size,new_meta_buffer);
 548                         free(new_meta_buffer);
 549
 550                         *out_size = membuffer_get_size(buf);
 551                         *out_buffer = membuffer_detach(buf);
 552                         membuffer_free(buf);
 553                         return 1;
 554                 }
 555                 meta_offset = mp4ff_position(f);
 556                 meta_size = mp4ff_read_int32(f);
 557                 if (!find_atom(f,meta_offset+12,meta_size-12,"ilst")) return 0;//shouldn't happen, find_atom_v2 above takes care of it
 558                 ilst_offset = mp4ff_position(f);
 559                 ilst_size = mp4ff_read_int32(f);
 560
 561                 if (!create_ilst(data,&new_ilst_buffer,&new_ilst_size)) return 0;
 562
 563                 size_delta = new_ilst_size - (ilst_size - 8);
 564
 565                 *out_size = total_size + size_delta;
 566                 *out_buffer = malloc(*out_size);
 567                 if (*out_buffer == 0)
 568                 {
 569                         free(new_ilst_buffer);
 570                         return 0;
 571                 }
 572
 573                 p_out = (uint8_t*)*out_buffer;
 574
 575                 mp4ff_set_position(f,total_base);
 576                 mp4ff_read_data(f,p_out,(uint32_t)(udta_offset - total_base )); p_out += (uint32_t)(udta_offset - total_base );
 577                 *(uint32_t*)p_out = fix_byte_order_32(mp4ff_read_int32(f) + size_delta); p_out += 4;
 578                 mp4ff_read_data(f,p_out,4); p_out += 4;
 579                 mp4ff_read_data(f,p_out,(uint32_t)(meta_offset - udta_offset - 8)); p_out += (uint32_t)(meta_offset - udta_offset - 8);
 580                 *(uint32_t*)p_out = fix_byte_order_32(mp4ff_read_int32(f) + size_delta); p_out += 4;
 581                 mp4ff_read_data(f,p_out,4); p_out += 4;
 582                 mp4ff_read_data(f,p_out,(uint32_t)(ilst_offset - meta_offset - 8)); p_out += (uint32_t)(ilst_offset - meta_offset - 8);
 583                 *(uint32_t*)p_out = fix_byte_order_32(mp4ff_read_int32(f) + size_delta); p_out += 4;
 584                 mp4ff_read_data(f,p_out,4); p_out += 4;
 585
 586                 memcpy(p_out,new_ilst_buffer,new_ilst_size);
 587                 p_out += new_ilst_size;
 588
 589                 mp4ff_set_position(f,ilst_offset + ilst_size);
 590                 mp4ff_read_data(f,p_out,(uint32_t)(total_size - (ilst_offset - total_base) - ilst_size));
 591
 592                 free(new_ilst_buffer);
 593         }
 594         return 1;
 595
 596 }
 597
 598 static int32_t mp4ff_meta_update(mp4ff_callback_t *f,const mp4ff_metadata_t * data)
 599 {
 600         void * new_moov_data;
 601         uint32_t new_moov_size;
 602
 603     mp4ff_t *ff = malloc(sizeof(mp4ff_t));
 604
 605     memset(ff, 0, sizeof(mp4ff_t));
 606     ff->stream = f;
 607         mp4ff_set_position(ff,0);
 608
 609     parse_atoms(ff);
 610
 611
 612         if (!modify_moov(ff,data,&new_moov_data,&new_moov_size))
 613         {
 614                 mp4ff_close(ff);
 615                 return 0;
 616         }
 617
 618     /* copy moov atom to end of the file */
 619     if (ff->last_atom != ATOM_MOOV)
 620     {
 621         char *free_data = "free";
 622
 623         /* rename old moov to free */
 624         mp4ff_set_position(ff, ff->moov_offset + 4);
 625         mp4ff_write_data(ff, free_data, 4);
 626
 627         mp4ff_set_position(ff, ff->file_size);
 628                 mp4ff_write_int32(ff,new_moov_size + 8);
 629                 mp4ff_write_data(ff,"moov",4);
 630                 mp4ff_write_data(ff, new_moov_data, new_moov_size);
 631     }
 632         else
 633         {
 634         mp4ff_set_position(ff, ff->moov_offset);
 635                 mp4ff_write_int32(ff,new_moov_size + 8);
 636                 mp4ff_write_data(ff,"moov",4);
 637                 mp4ff_write_data(ff, new_moov_data, new_moov_size);
 638         }
 639
 640         mp4ff_truncate(ff);
 641
 642         mp4ff_close(ff);
 643     return 1;
 644 }
 645 #endif