src/swfextract.c

   1 /* swfextract.c
   2    Allows to extract parts of the swf into a new file.
   3
   4    Part of the swftools package.
   5
   6    Copyright (c) 2001 Matthias Kramm <kramm@quiss.org>
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
  21
  22 #include <unistd.h>
  23 #include <stdio.h>
  24 #include <fcntl.h>
  25 #include "../lib/rfxswf.h"
  26 #include "../lib/args.h"
  27 #include "../lib/log.h"
  28 #ifdef HAVE_ZLIB_H
  29 #ifdef HAVE_LIBZ
  30 #include "zlib.h"
  31 #define _ZLIB_INCLUDED_
  32 #endif
  33 #endif
  34
  35 char * filename = 0;
  36 char * destfilename = "output.swf";
  37 int verbose = 3;
  38
  39 char* extractids = 0;
  40 char* extractframes = 0;
  41 char* extractjpegids = 0;
  42 char* extractfontids = 0;
  43 char* extractpngids = 0;
  44 char* extractsoundids = 0;
  45 char extractmp3 = 0;
  46
  47 char* extractname = 0;
  48
  49 char hollow = 0;
  50 char originalplaceobjects = 0;
  51 char movetozero = 0;
  52
  53 int numextracts = 0;
  54
  55 struct options_t options[] =
  56 {
  57  {"o","output"},
  58  {"w","hollow"},
  59  {"v","verbose"},
  60  {"i","id"},
  61  {"j","jpegs"},
  62  {"p","pngs"},
  63  {"P","placeobject"},
  64  {"0","movetozero"},
  65  {"m","mp3"},
  66  {"s","sound"},
  67  {"n","name"},
  68  {"f","frame"},
  69  {"F","font"},
  70  {"V","version"},
  71  {0,0}
  72 };
  73
  74
  75 int args_callback_option(char*name,char*val)
  76 {
  77     if(!strcmp(name, "V")) {
  78         printf("swfextract - part of %s %s\n", PACKAGE, VERSION);
  79         exit(0);
  80     }
  81     else if(!strcmp(name, "o")) {
  82         destfilename = val;
  83         return 1;
  84     }
  85     else if(!strcmp(name, "i")) {
  86         extractids = val;
  87         numextracts++;
  88         if(extractname) {
  89             fprintf(stderr, "You can only supply either name or id\n");
  90             exit(1);
  91         }
  92         return 1;
  93     }
  94     else if(!strcmp(name, "n")) {
  95         extractname = val;
  96         numextracts++;
  97         if(extractids) {
  98             fprintf(stderr, "You can only supply either name or id\n");
  99             exit(1);
 100         }
 101         return 1;
 102     }
 103     else if(!strcmp(name, "v")) {
 104         verbose ++;
 105         return 0;
 106     }
 107     else if(!strcmp(name, "m")) {
 108         extractmp3 = 1;
 109         numextracts++;
 110         return 0;
 111     }
 112     else if(!strcmp(name, "j")) {
 113         if(extractjpegids) {
 114             fprintf(stderr, "Only one --jpegs argument is allowed. (Try to use a range, e.g. -j 1,2,3)\n");
 115             exit(1);
 116         }
 117         /* TODO: count number of IDs in val range */
 118         numextracts++;
 119         extractjpegids = val;
 120         return 1;
 121     }
 122     else if(!strcmp(name, "F")) {
 123         if(extractfontids) {
 124             fprintf(stderr, "Only one --font argument is allowed. (Try to use a range, e.g. -s 1,2,3)\n");
 125             exit(1);
 126         }
 127         numextracts++;
 128         extractfontids = val;
 129         return 1;
 130     }
 131     else if(!strcmp(name, "s")) {
 132         if(extractsoundids) {
 133             fprintf(stderr, "Only one --sound argument is allowed. (Try to use a range, e.g. -s 1,2,3)\n");
 134             exit(1);
 135         }
 136         numextracts++;
 137         extractsoundids = val;
 138         return 1;
 139     }
 140 #ifdef _ZLIB_INCLUDED_
 141     else if(!strcmp(name, "p")) {
 142         if(extractpngids) {
 143             fprintf(stderr, "Only one --png argument is allowed. (Try to use a range, e.g. -p 1,2,3)\n");
 144             exit(1);
 145         }
 146         numextracts++;
 147         extractpngids = val;
 148         return 1;
 149     }
 150 #endif
 151     else if(!strcmp(name, "f")) {
 152         numextracts++;
 153         extractframes = val;
 154         return 1;
 155     }
 156     else if(!strcmp(name, "P")) {
 157         originalplaceobjects = 1;
 158         return 0;
 159     }
 160     else if(!strcmp(name, "0")) {
 161         movetozero = 1;
 162         return 0;
 163     }
 164     else if(!strcmp(name, "w")) {
 165         hollow = 1;
 166         return 0;
 167     }
 168     else {
 169         printf("Unknown option: -%s\n", name);
 170         exit(1);
 171     }
 172
 173     return 0;
 174 }
 175 int args_callback_longoption(char*name,char*val)
 176 {
 177     return args_long2shortoption(options, name, val);
 178 }
 179 void args_callback_usage(char*name)
 180 {
 181     printf("Usage: %s [-v] [-n name] [-ijf ids] file.swf\n", name);
 182     printf("\t-v , --verbose\t\t\t Be more verbose\n");
 183     printf("\t-o , --output filename\t\t set output filename\n");
 184     printf("\t-V , --version\t\t\t Print program version and exit\n\n");
 185     printf("SWF Subelement extraction:\n");
 186     printf("\t-n , --name name\t\t instance name of the object (SWF Define) to extract\n");
 187     printf("\t-i , --id ID\t\t\t ID of the object, shape or movieclip to extract\n");
 188     printf("\t-f , --frame frames\t\t frame numbers to extract\n");
 189     printf("\t-w , --hollow\t\t\t hollow mode: don't remove empty frames\n");
 190     printf("\t             \t\t\t (use with -f)\n");
 191     printf("\t-P , --placeobject\t\t\t Insert original placeobject into output file\n");
 192     printf("\t             \t\t\t (use with -i)\n");
 193     printf("SWF Font/Text extraction:\n");
 194     printf("\t-F , --font ID\t\t\t Extract font(s)\n");
 195     printf("Picture extraction:\n");
 196     printf("\t-j , --jpeg ID\t\t\t Extract JPEG picture(s)\n");
 197 #ifdef _ZLIB_INCLUDED_
 198     printf("\t-p , --pngs ID\t\t\t Extract PNG picture(s)\n");
 199 #endif
 200     printf("\n");
 201     printf("Sound extraction:\n");
 202     printf("\t-m , --mp3\t\t\t Extract main mp3 stream\n");
 203     printf("\t-s , --sound ID\t\t\t Extract Sound(s)\n");
 204 }
 205 int args_callback_command(char*name,char*val)
 206 {
 207     if(filename) {
 208         fprintf(stderr, "Only one file allowed. You supplied at least two. (%s and %s)\n",
 209                  filename, name);
 210     }
 211     filename = name;
 212     return 0;
 213 }
 214
 215 U8 mainr,maing,mainb;
 216 /* 1 = used, not expanded,
 217    3 = used, expanded
 218    5 = wanted, not expanded
 219    7 = wanted, expanded
 220  */
 221 char used[65536];
 222 TAG*tags[65536];
 223 int changed;
 224 char * tagused;
 225 int extractname_id = -1;
 226
 227 void idcallback(void*data)
 228 {
 229     if(!(used[GET16(data)]&1)) {
 230         changed = 1;
 231         used[GET16(data)] |= 1;
 232     }
 233 }
 234
 235 void enumerateIDs(TAG*tag, void(*callback)(void*))
 236 {
 237 /*    U8*data;
 238     int len = tag->len;
 239     if(tag->len>=64) {
 240         len += 6;
 241         data = (U8*)malloc(len);
 242         PUT16(data, (tag->id<<6)+63);
 243         *(U8*)&data[2] = tag->len;
 244         *(U8*)&data[3] = tag->len>>8;
 245         *(U8*)&data[4] = tag->len>>16;
 246         *(U8*)&data[5] = tag->len>>24;
 247         memcpy(&data[6], tag->data, tag->len);
 248     } else {
 249         len += 2;
 250         data = (U8*)malloc(len);
 251         PUT16(data, (tag->id<<6)+tag->len);
 252         memcpy(&data[2], tag->data, tag->len);
 253     }
 254     map_ids_mem(data, len, callback);
 255  */
 256     int num = swf_GetNumUsedIDs(tag);
 257     int *ptr = malloc(sizeof(int)*num);
 258     int t;
 259     swf_GetUsedIDs(tag, ptr);
 260     for(t=0;t<num;t++)
 261         callback(&tag->data[ptr[t]]);
 262 }
 263
 264 void moveToZero(TAG*tag)
 265 {
 266     if(!swf_isPlaceTag(tag))
 267         return;
 268     SWFPLACEOBJECT obj;
 269     swf_GetPlaceObject(tag, &obj);
 270     obj.matrix.tx = 0;
 271     obj.matrix.ty = 0;
 272     swf_ResetTag(tag, tag->id);
 273     swf_SetPlaceObject(tag, &obj);
 274 }
 275
 276 void extractTag(SWF*swf, char*filename)
 277 {
 278     SWF newswf;
 279     TAG*desttag;
 280     TAG*srctag;
 281     RGBA rgb;
 282     SRECT objectbbox;
 283     char sprite;
 284     int f;
 285     int t;
 286     int tagnum;
 287     int copy = 0;
 288     memset(&newswf,0x00,sizeof(SWF));        // set global movie parameters
 289
 290     newswf.fileVersion    = swf->fileVersion;
 291     newswf.frameRate      = swf->frameRate;
 292     newswf.movieSize      = swf->movieSize;
 293     if(movetozero && originalplaceobjects) {
 294         newswf.movieSize.xmax = swf->movieSize.xmax - swf->movieSize.xmin;
 295         newswf.movieSize.ymax = swf->movieSize.ymax - swf->movieSize.ymin;
 296         newswf.movieSize.xmin = 0;
 297         newswf.movieSize.ymin = 0;
 298     }
 299
 300     newswf.firstTag = swf_InsertTag(NULL,ST_SETBACKGROUNDCOLOR);
 301     desttag = newswf.firstTag;
 302     rgb.r = mainr;
 303     rgb.g = maing;
 304     rgb.b = mainb;
 305     swf_SetRGB(desttag,&rgb);
 306
 307     swf_GetRect(0, &objectbbox);
 308
 309     do {
 310        changed = 0;
 311        for(t=0;t<65536;t++) {
 312            if(used[t] && !(used[t]&2)) {
 313              if(tags[t]==0) {
 314                  msg("<warning> ID %d is referenced, but never defined.", t);
 315              } else if(tags[t]->id==ST_DEFINESPRITE) {
 316                  TAG*tag = tags[t];
 317                  while(tag->id != ST_END)
 318                  {
 319                      enumerateIDs(tag, idcallback);
 320                      tag = tag->next;
 321                  }
 322              }
 323              else
 324                enumerateIDs(tags[t], idcallback);
 325              used[t] |= 2;
 326            }
 327        }
 328     }
 329     while(changed);
 330
 331     srctag = swf->firstTag;
 332     tagnum = 0;
 333     sprite = 0;
 334     while(srctag && (srctag->id || sprite)) {
 335         int reset = 0;
 336         if(!sprite) {
 337             copy = 0;
 338         }
 339         if(srctag->id == ST_END) {
 340             sprite = 0;
 341         }
 342         if(srctag->id == ST_DEFINESPRITE)
 343             sprite = 1;
 344         if(srctag->id == ST_JPEGTABLES)
 345             copy = 1;
 346         if(swf_isDefiningTag(srctag)) {
 347             int id = swf_GetDefineID(srctag);
 348             if(used[id])  {
 349                 SRECT b;
 350                 copy = 1;
 351                 b = swf_GetDefineBBox(srctag);
 352                 swf_ExpandRect2(&objectbbox, &b);
 353             }
 354         } else
 355         if ((((swf_isPlaceTag(srctag) && originalplaceobjects)
 356               || srctag->id == ST_STARTSOUND) && (used[swf_GetPlaceID(srctag)]&4) ) ||
 357               (swf_isPseudoDefiningTag(srctag) && used[swf_GetDefineID(srctag)]) ||
 358               (tagused[tagnum]))
 359         {
 360                 if(copy == 0)
 361                     reset = 1;
 362                 copy = 1;
 363         }
 364         if(srctag->id == ST_REMOVEOBJECT) {
 365             if(!used[swf_GetPlaceID(srctag)])
 366                 copy = 0;
 367         }
 368
 369         if(copy) {
 370             TAG*ttag = (TAG*)malloc(sizeof(TAG));
 371             desttag = swf_InsertTag(desttag, srctag->id);
 372             desttag->len = desttag->memsize = srctag->len;
 373             desttag->data = malloc(srctag->len);
 374             memcpy(desttag->data, srctag->data, srctag->len);
 375             if(movetozero && swf_isPlaceTag(desttag)) {
 376                 moveToZero(desttag);
 377             }
 378             if(reset)
 379                 copy = 0;
 380         }
 381
 382         srctag = srctag->next;
 383         tagnum ++;
 384     }
 385     if(!extractframes && !hollow) {
 386         if(!originalplaceobjects && (extractids||extractname_id>=0)) {
 387             int number = 0;
 388             int id = 0;
 389             int t;
 390             TAG* objtag = 0;
 391             SRECT bbox;
 392             memset(&bbox, 0, sizeof(SRECT));
 393             if(extractids) {
 394                 for(t=0;t<65536;t++) {
 395                     if(is_in_range(t, extractids)) {
 396                         id = t;
 397                         number++;
 398                     }
 399                 }
 400             }
 401             if(number>=2) {
 402                 printf("warning! You should use the -P when extracting multiple objects\n");
 403             }
 404
 405             if(number == 1) {
 406                 /* if there is only one object, we will scale it.
 407                    So let's figure out its bounding box */
 408                 TAG*tag = swf->firstTag;
 409                 while(tag) {
 410                     if(swf_isDefiningTag(tag) && tag->id != ST_DEFINESPRITE) {
 411                         if(swf_GetDefineID(tag) == id)
 412                             bbox = swf_GetDefineBBox(tag);
 413                         objtag = tag;
 414                     }
 415                     tag = tag->next;
 416                 }
 417                 newswf.movieSize.xmin = 0;
 418                 newswf.movieSize.ymin = 0;
 419                 newswf.movieSize.xmax = 512*20;
 420                 newswf.movieSize.ymax = 512*20;
 421             } else {
 422                 if((objectbbox.xmin|objectbbox.ymin|objectbbox.xmax|objectbbox.ymax)!=0)
 423                     newswf.movieSize = objectbbox;
 424             }
 425
 426             if(extractname_id>=0) {
 427                 desttag = swf_InsertTag(desttag, ST_PLACEOBJECT2);
 428                 swf_ObjectPlace(desttag, extractname_id, extractname_id, 0,0,extractname);
 429             } else {
 430                 for(t=0;t<65536;t++) {
 431                     if(is_in_range(t, extractids)) {
 432                         MATRIX m;
 433                         desttag = swf_InsertTag(desttag, ST_PLACEOBJECT2);
 434                         swf_GetMatrix(0, &m);
 435                         if(objtag) {
 436                             int width = bbox.xmax - bbox.xmin;
 437                             int height = bbox.ymax - bbox.ymin;
 438                             int max = width>height?width:height;
 439                             m.tx = -bbox.xmin;
 440                             m.ty = -bbox.ymin;
 441                             if(max) {
 442                                 m.sx = (512*20*65536)/max;
 443                                 m.sy = (512*20*65536)/max;
 444                             }
 445                             //newswf.movieSize = swf_TurnRect(newswf.movieSize, &m);
 446                         }
 447                         swf_ObjectPlace(desttag, t, t, &m,0,0);
 448                     }
 449                 }
 450             }
 451         }
 452         desttag = swf_InsertTag(desttag,ST_SHOWFRAME);
 453     }
 454     desttag = swf_InsertTag(desttag,ST_END);
 455
 456     f = open(filename, O_TRUNC|O_WRONLY|O_CREAT|O_BINARY, 0644);
 457     if FAILED(swf_WriteSWF(f,&newswf)) fprintf(stderr,"WriteSWF() failed.\n");
 458     close(f);
 459
 460     swf_FreeTags(&newswf);                       // cleanup
 461 }
 462
 463 int isOfType(int t, TAG*tag)
 464 {
 465     int show = 0;
 466     if(t == 0 && (tag->id == ST_DEFINESHAPE ||
 467         tag->id == ST_DEFINESHAPE2 ||
 468         tag->id == ST_DEFINESHAPE3)) {
 469         show = 1;
 470     }
 471     if(t==1 && tag->id == ST_DEFINESPRITE) {
 472         show = 1;
 473     }
 474     if(t == 2 && (tag->id == ST_DEFINEBITS ||
 475         tag->id == ST_DEFINEBITSJPEG2 ||
 476         tag->id == ST_DEFINEBITSJPEG3)) {
 477         show = 1;
 478     }
 479     if(t == 3 && (tag->id == ST_DEFINEBITSLOSSLESS ||
 480         tag->id == ST_DEFINEBITSLOSSLESS2)) {
 481         show = 1;
 482     }
 483     if(t == 4 && (tag->id == ST_DEFINESOUND)) {
 484         show = 1;
 485     }
 486     if(t == 5 && (tag->id == ST_DEFINEFONT || tag->id == ST_DEFINEFONT2)) {
 487         show = 1;
 488     }
 489     return show;
 490 }
 491
 492 void listObjects(SWF*swf)
 493 {
 494     TAG*tag;
 495     char first;
 496     int t;
 497     int frame = 0;
 498     char*names[] = {"Shape", "MovieClip", "JPEG", "PNG", "Sound", "Font"};
 499     char*options[] = {"-i", "-i", "-j", "-p", "-s", "-F"};
 500     int mp3=0;
 501     printf("Objects in file %s:\n",filename);
 502     swf_FoldAll(swf);
 503     for(t=0;t<sizeof(names)/sizeof(names[0]);t++) {
 504         int nr=0;
 505         int lastid = -2, lastprint=-1;
 506         int follow=0;
 507         tag = swf->firstTag;
 508         first = 1;
 509         while(tag) {
 510             if(tag->id == ST_SOUNDSTREAMHEAD || tag->id == ST_SOUNDSTREAMHEAD2)
 511                 mp3 = 1;
 512             if(isOfType(t,tag))
 513                 nr++;
 514             tag = tag->next;
 515         }
 516         if(!nr)
 517             continue;
 518
 519         printf(" [%s] %d %s%s: ID(s) ", options[t], nr, names[t], nr>1?"s":"");
 520
 521         tag = swf->firstTag;
 522         while(tag) {
 523             char text[80];
 524             char show = isOfType(t,tag);
 525             int id;
 526             if(!show) {
 527                 tag = tag->next;
 528                 continue;
 529             }
 530             id = swf_GetDefineID(tag);
 531
 532             if(id == lastid+1) {
 533                 follow=1;
 534             } else {
 535                 if(first || !follow) {
 536                     if(!first)
 537                         printf(", ");
 538                     printf("%d", id);
 539                 } else {
 540                     if(lastprint + 1 == lastid)
 541                         printf(", %d, %d", lastid, id);
 542                     else
 543                         printf("-%d, %d", lastid, id);
 544                 }
 545                 lastprint = id;
 546                 first = 0;
 547                 follow = 0;
 548             }
 549             lastid = id;
 550             tag=tag->next;
 551         }
 552         if(follow) {
 553             if(lastprint + 1 == lastid)
 554                 printf(", %d", lastid);
 555             else
 556                 printf("-%d", lastid);
 557         }
 558         printf("\n");
 559     }
 560
 561     if(frame)
 562         printf(" [-f] %d Frames: ID(s) 0-%d\n", frame, frame);
 563     else
 564         printf(" [-f] 1 Frame: ID(s) 0\n");
 565
 566     if(mp3)
 567         printf(" [-m] 1 MP3 Soundstream\n");
 568 }
 569
 570 void handlefont(SWF*swf, TAG*tag)
 571 {
 572     SWFFONT* f=0;
 573     U16 id;
 574     char name[80];
 575     char*filename = name;
 576     int t;
 577
 578     id = swf_GetDefineID(tag);
 579     sprintf(name, "font%d.swf", id);
 580     if(numextracts==1) {
 581         filename = destfilename;
 582     }
 583
 584     swf_FontExtract(swf, id, &f);
 585     if(!f) {
 586         printf("Couldn't extract font %d\n", id);
 587         return;
 588     }
 589     if(!f->layout)
 590         swf_FontCreateLayout(f);
 591
 592     swf_WriteFont(f, filename);
 593     swf_FontFree(f);
 594 }
 595
 596 static char has_jpegtables=0;
 597 static U8*jpegtables = 0;
 598 static int jpegtablessize = 0;
 599
 600 void handlejpegtables(TAG*tag)
 601 {
 602     if(tag->id == ST_JPEGTABLES) {
 603         jpegtables = tag->data;
 604         jpegtablessize = tag->len;
 605         has_jpegtables = 1;
 606     }
 607 }
 608
 609 FILE* save_fopen(char* name, char* mode)
 610 {
 611     FILE*fi = fopen(name, mode);
 612     if(!fi) {
 613         fprintf(stderr, "Error: Couldn't open %s\n", name);
 614         exit(1);
 615     }
 616     return fi;
 617 }
 618
 619 int findjpegboundary(U8*data, int len)
 620 {
 621     int t;
 622     int pos=-1;
 623     for(t=0;t<len-4;t++) {
 624         if(data[t  ]==0xff &&
 625            data[t+1]==0xd9 &&
 626            data[t+2]==0xff &&
 627            data[t+3]==0xd8) {
 628             pos = t;
 629         }
 630     }
 631     return pos;
 632 }
 633
 634 /* extract jpeg data out of a tag */
 635 void handlejpeg(TAG*tag)
 636 {
 637     char name[80];
 638     char*filename = name;
 639     FILE*fi;
 640
 641     sprintf(name, "pic%d.jpg", GET16(tag->data));
 642     if(numextracts==1) {
 643         filename = destfilename;
 644         if(!strcmp(filename,"output.swf"))
 645             filename = "output.jpg";
 646     }
 647     /* swf jpeg images have two streams, which both start with ff d8 and
 648        end with ff d9. The following code handles sorting the middle
 649        <ff d9 ff d8> bytes out, so that one stream remains */
 650     if(tag->id == ST_DEFINEBITSJPEG && tag->len>2 && has_jpegtables) {
 651         fi = save_fopen(filename, "wb");
 652         if(jpegtablessize>=2) {
 653             fwrite(jpegtables, 1, jpegtablessize-2, fi); //don't write end tag (ff,d8)
 654             fwrite(&tag->data[2+2], tag->len-2-2, 1, fi); //don't write start tag (ff,d9)
 655         } else {
 656             fwrite(tag->data+2, tag->len-2, 1, fi);
 657         }
 658         fclose(fi);
 659     }
 660     else if(tag->id == ST_DEFINEBITSJPEG2 && tag->len>2) {
 661         int end = tag->len;
 662         int pos = findjpegboundary(&tag->data[2], tag->len-2);
 663         if(pos>=0) {
 664             pos+=2;
 665             fi = save_fopen(filename, "wb");
 666             fwrite(&tag->data[2], pos-2, 1, fi);
 667             fwrite(&tag->data[pos+4], end-(pos+4), 1, fi);
 668             fclose(fi);
 669         } else {
 670             fi = save_fopen(filename, "wb");
 671             fwrite(&tag->data[2], end-2, 1, fi);
 672             fclose(fi);
 673         }
 674     }
 675     else if(tag->id == ST_DEFINEBITSJPEG3 && tag->len>6) {
 676         U32 end = GET32(&tag->data[2])+6;
 677         int pos = findjpegboundary(&tag->data[6], tag->len-6);
 678         if(pos<0) {
 679             fi = save_fopen(filename, "wb");
 680             fwrite(&tag->data[6], end-6, 1, fi);
 681             fclose(fi);
 682         } else {
 683             pos+=6;
 684             fi = save_fopen(filename, "wb");
 685             fwrite(&tag->data[6], pos-6, 1, fi);
 686             fwrite(&tag->data[pos+4], end-(pos+4), 1, fi);
 687             fclose(fi);
 688         }
 689     }
 690     else {
 691         int id = GET16(tag->data);
 692         fprintf(stderr, "Object %d is not a JPEG picture!\n",id, jpegtables);
 693         exit(1);
 694     }
 695 }
 696
 697 #ifdef _ZLIB_INCLUDED_
 698 static U32 mycrc32;
 699
 700 static U32*crc32_table = 0;
 701 static void make_crc32_table(void)
 702 {
 703   int t;
 704   if(crc32_table)
 705       return;
 706   crc32_table = (U32*)malloc(1024);
 707
 708   for (t = 0; t < 256; t++) {
 709     U32 c = t;
 710     int s;
 711     for (s = 0; s < 8; s++) {
 712       c = (0xedb88320L*(c&1)) ^ (c >> 1);
 713     }
 714     crc32_table[t] = c;
 715   }
 716 }
 717 static inline void png_write_byte(FILE*fi, U8 byte)
 718 {
 719     fwrite(&byte,1,1,fi);
 720     mycrc32 = crc32_table[(mycrc32 ^ byte) & 0xff] ^ (mycrc32 >> 8);
 721 }
 722 static void png_start_chunk(FILE*fi, char*type, int len)
 723 {
 724     U8 mytype[4]={0,0,0,0};
 725     U32 mylen = REVERSESWAP32(len);
 726     memcpy(mytype,type,strlen(type));
 727     fwrite(&mylen, 4, 1, fi);
 728     mycrc32=0xffffffff;
 729     png_write_byte(fi,mytype[0]);
 730     png_write_byte(fi,mytype[1]);
 731     png_write_byte(fi,mytype[2]);
 732     png_write_byte(fi,mytype[3]);
 733 }
 734 static void png_write_bytes(FILE*fi, U8*bytes, int len)
 735 {
 736     int t;
 737     for(t=0;t<len;t++)
 738         png_write_byte(fi,bytes[t]);
 739 }
 740 static void png_write_dword(FILE*fi, U32 dword)
 741 {
 742     png_write_byte(fi,dword>>24);
 743     png_write_byte(fi,dword>>16);
 744     png_write_byte(fi,dword>>8);
 745     png_write_byte(fi,dword);
 746 }
 747 static void png_end_chunk(FILE*fi)
 748 {
 749     U32 tmp = REVERSESWAP32((mycrc32^0xffffffff));
 750     fwrite(&tmp,4,1,fi);
 751 }
 752
 753
 754 /* extract a lossless image (png) out of a tag
 755    This routine was originally meant to be a one-pager. I just
 756    didn't know png is _that_ much fun. :) -mk
 757  */
 758 void handlelossless(TAG*tag)
 759 {
 760     char name[80];
 761     char*filename = name;
 762     FILE*fi;
 763     int width, height;
 764     int crc;
 765     int id;
 766     int t;
 767     U8 bpp = 1;
 768     U8 format;
 769     U8 tmp;
 770     Bytef* data=0;
 771     U8* data2=0;
 772     U8* data3=0;
 773     uLongf datalen;
 774     uLongf datalen2;
 775     U32 datalen3;
 776     U8 head[] = {137,80,78,71,13,10,26,10};
 777     int cols;
 778     char alpha = tag->id == ST_DEFINEBITSLOSSLESS2;
 779     RGBA* palette;
 780     int pos;
 781     int error;
 782     U32 tmp32;
 783
 784     make_crc32_table();
 785
 786     if(tag->id != ST_DEFINEBITSLOSSLESS &&
 787        tag->id != ST_DEFINEBITSLOSSLESS2) {
 788         int id = GET16(tag->data);
 789         fprintf(stderr, "Object %d is not a PNG picture!\n",id);
 790         exit(1);
 791     }
 792
 793     id =swf_GetU16(tag);
 794     format = swf_GetU8(tag);
 795     if(format == 3) bpp = 8;
 796     if(format == 4) bpp = 16;
 797     if(format == 5) bpp = 32;
 798     if(format!=3 && format!=5) {
 799         if(format==4)
 800         fprintf(stderr, "Can't handle 16-bit palette images yet (image %d)\n",id);
 801         else
 802         fprintf(stderr, "Unknown image type %d in image %d\n", format, id);
 803         return;
 804     }
 805     width = swf_GetU16(tag);
 806     height = swf_GetU16(tag);
 807     if(format == 3) cols = swf_GetU8(tag) + 1;
 808 // this is what format means according to the flash specification. (which is
 809 // clearly wrong)
 810 //    if(format == 4) cols = swf_GetU16(tag) + 1;
 811 //    if(format == 5) cols = swf_GetU32(tag) + 1;
 812     else cols = 0;
 813
 814     msg("<verbose> Width %d", width);
 815     msg("<verbose> Height %d", height);
 816     msg("<verbose> Format %d", format);
 817     msg("<verbose> Cols %d", cols);
 818     msg("<verbose> Bpp %d", bpp);
 819
 820     datalen = (width*height*bpp/8+cols*8);
 821     do {
 822         if(data)
 823             free(data);
 824         datalen+=4096;
 825         data = malloc(datalen);
 826         error = uncompress (data, &datalen, &tag->data[tag->pos], tag->len-tag->pos);
 827     } while(error == Z_BUF_ERROR);
 828     if(error != Z_OK) {
 829         fprintf(stderr, "Zlib error %d (image %d)\n", error, id);
 830         return;
 831     }
 832     msg("<verbose> Uncompressed image is %d bytes (%d colormap)", datalen, (3+alpha)*cols);
 833     pos = 0;
 834     datalen2 = datalen;
 835     data2 = malloc(datalen2);
 836     palette = (RGBA*)malloc(cols*sizeof(RGBA));
 837
 838     for(t=0;t<cols;t++) {
 839         palette[t].r = data[pos++];
 840         palette[t].g = data[pos++];
 841         palette[t].b = data[pos++];
 842         if(alpha) {
 843             palette[t].a = data[pos++];
 844         }
 845     }
 846
 847     sprintf(name, "pic%d.png", id);
 848     if(numextracts==1) {
 849         filename = destfilename;
 850         if(!strcmp(filename,"output.swf"))
 851             filename = "output.png";
 852     }
 853     fi = save_fopen(filename, "wb");
 854     fwrite(head,sizeof(head),1,fi);
 855
 856     png_start_chunk(fi, "IHDR", 13);
 857      png_write_dword(fi,width);
 858      png_write_dword(fi,height);
 859      png_write_byte(fi,8);
 860      if(format == 3)
 861      png_write_byte(fi,3); //indexed
 862      else if(format == 5 && alpha==0)
 863      png_write_byte(fi,2); //rgb
 864      else if(format == 5 && alpha==1)
 865      png_write_byte(fi,6); //rgba
 866      else return;
 867
 868      png_write_byte(fi,0); //compression mode
 869      png_write_byte(fi,0); //filter mode
 870      png_write_byte(fi,0); //interlace mode
 871     png_end_chunk(fi);
 872
 873     if(format == 3) {
 874         png_start_chunk(fi, "PLTE", 768);
 875
 876          for(t=0;t<256;t++) {
 877              png_write_byte(fi,palette[t].r);
 878              png_write_byte(fi,palette[t].g);
 879              png_write_byte(fi,palette[t].b);
 880          }
 881         png_end_chunk(fi);
 882
 883         if(alpha) {
 884             /* write alpha palette */
 885             png_start_chunk(fi, "tRNS", 256);
 886             for(t=0;t<256;t++) {
 887                 png_write_byte(fi,palette[t].a);
 888             }
 889             png_end_chunk(fi);
 890         }
 891     }
 892     {
 893         int pos2 = 0;
 894         int x,y;
 895         int srcwidth = width * (bpp/8);
 896         datalen3 = (width*4+5)*height;
 897         data3 = (U8*)malloc(datalen3);
 898         for(y=0;y<height;y++)
 899         {
 900            data3[pos2++]=0; //filter type
 901            if(bpp==32) {
 902             if(!alpha) {
 903                 // 32 bit to 24 bit "conversion"
 904                 for(x=0;x<width;x++) {
 905                     data3[pos2++]=data[pos+1];
 906                     data3[pos2++]=data[pos+2];
 907                     data3[pos2++]=data[pos+3];
 908                     pos+=4; //ignore padding byte
 909                 }
 910             } else {
 911                 for(x=0;x<width;x++) {
 912                     data3[pos2++]=data[pos+1];
 913                     data3[pos2++]=data[pos+2];
 914                     data3[pos2++]=data[pos+3];
 915                     data3[pos2++]=data[pos+0]; //alpha
 916                     pos+=4;
 917                 }
 918             }
 919            }
 920            else {
 921                 for(x=0;x<srcwidth;x++)
 922                     data3[pos2++]=data[pos++];
 923            }
 924
 925            pos+=((srcwidth+3)&~3)-srcwidth; //align
 926         }
 927         datalen3=pos2;
 928     }
 929
 930     if(compress (data2, &datalen2, data3, datalen3) != Z_OK) {
 931         fprintf(stderr, "zlib error in pic %d\n", id);
 932         return;
 933     }
 934     msg("<verbose> Compressed data is %d bytes", datalen2);
 935     png_start_chunk(fi, "IDAT", datalen2);
 936     png_write_bytes(fi,data2,datalen2);
 937     png_end_chunk(fi);
 938     png_start_chunk(fi, "IEND", 0);
 939     png_end_chunk(fi);
 940
 941     free(data);
 942     free(data2);
 943     free(data3);
 944 }
 945 #endif
 946
 947 static FILE*mp3file=0;
 948 void handlesoundstream(TAG*tag)
 949 {
 950     char*filename = "output.mp3";
 951     if(numextracts==1) {
 952         filename = destfilename;
 953         if(!strcmp(filename,"output.swf"))
 954             filename = "output.mp3";
 955     }
 956     switch(tag->id) {
 957         case ST_SOUNDSTREAMHEAD:
 958             if((tag->data[1]&0x30) == 0x20) { //mp3 compression
 959                 mp3file = fopen(filename, "wb");
 960                 msg("<notice> Writing mp3 data to %s",filename);
 961             }
 962             else
 963                 msg("<error> Soundstream is not mp3");
 964         break;
 965         case ST_SOUNDSTREAMHEAD2:
 966             if((tag->data[1]&0x30) == 0x20) {//mp3 compression
 967                 mp3file = fopen(filename, "wb");
 968                 msg("<notice> Writing mp3 data to %s",filename);
 969             }
 970             else
 971                 msg("<error> Soundstream is not mp3 (2)");
 972         break;
 973         case ST_SOUNDSTREAMBLOCK:
 974             if(mp3file)
 975                 fwrite(&tag->data[4],tag->len-4,1,mp3file);
 976         break;
 977     }
 978 }
 979
 980 void handledefinesound(TAG*tag)
 981 {
 982     U8 flags;
 983     U32 samples;
 984     char buf[128];
 985     char*filename = buf;
 986     FILE*fi;
 987     char*extension = 0;
 988     int format;
 989     U16 id;
 990     int rate,bits,stereo;
 991     char*rates[] = {"5500","11025","22050","44100"};
 992     id = swf_GetU16(tag); //id
 993
 994     flags = swf_GetU8(tag);
 995     format = flags>>4;
 996     rate = (flags>>2)&3;
 997     bits = flags&2?16:8;
 998     stereo = flags&1;
 999
1000     samples = swf_GetU32(tag);
1001
1002     extension = "raw";
1003
1004     if(format == 2) { // mp3
1005         swf_GetU16(tag); //numsamples_seek
1006         extension = "mp3";
1007     } else if(format == 0) { // raw
1008         printf("Sound is RAW, format: %s samples/sec, %d bit, %s\n", rates[rate], bits, stereo?"stereo":"mono");
1009         // TODO: convert to WAV
1010         extension = "raw";
1011     } else if(format == 1) { // adpcm
1012         printf("Sound is ADPCM, format: %s samples/sec, %d bit, %s\n", rates[rate], bits, stereo?"stereo":"mono");
1013         extension = "adpcm";
1014     }
1015     sprintf(buf, "sound%d.%s", id, extension);
1016     if(numextracts==1) {
1017         filename = destfilename;
1018         if(!strcmp(filename,"output.swf")) {
1019             sprintf(buf, "output.%s", extension);
1020             filename = buf;
1021         }
1022     }
1023     fi = save_fopen(filename, "wb");
1024     fwrite(&tag->data[tag->pos], tag->len - tag->pos, 1, fi);
1025     fclose(fi);
1026 }
1027
1028 int main (int argc,char ** argv)
1029 {
1030     TAG*tag;
1031     SWF swf;
1032     int f;
1033     int found = 0;
1034     int frame = 0;
1035     int tagnum = 0;
1036     char depths[65536];
1037     char listavailable = 0;
1038     processargs(argc, argv);
1039
1040     if(!extractframes && !extractids && ! extractname && !extractjpegids && !extractpngids
1041         && !extractmp3 && !extractsoundids && !extractfontids)
1042         listavailable = 1;
1043
1044     if(!originalplaceobjects && movetozero) {
1045         fprintf(stderr, "Error: -0 (--movetozero) can only be used in conjunction with -P (--placeobject)\n");
1046         return 0;
1047     }
1048
1049     if(!filename)
1050     {
1051         fprintf(stderr, "You must supply a filename.\n");
1052         return 1;
1053     }
1054     initLog(0,-1,0,0,-1, verbose);
1055
1056     f = open(filename,O_RDONLY|O_BINARY);
1057
1058     if (f<0)
1059     {
1060         perror("Couldn't open file: ");
1061         exit(1);
1062     }
1063     if (swf_ReadSWF(f,&swf) < 0)
1064     {
1065         fprintf(stderr, "%s is not a valid SWF file or contains errors.\n",filename);
1066         close(f);
1067         exit(1);
1068     }
1069     close(f);
1070
1071     if(listavailable) {
1072         listObjects(&swf);
1073         swf_FreeTags(&swf);
1074         return 0;
1075     }
1076
1077     tag = swf.firstTag;
1078     tagnum = 0;
1079     while(tag) {
1080         tagnum ++;
1081         tag = tag->next;
1082     }
1083
1084     tagused = (char*)malloc(tagnum);
1085     memset(tagused, 0, tagnum);
1086     memset(used, 0, 65536);
1087     memset(depths, 0, 65536);
1088
1089     tag = swf.firstTag;
1090     tagnum = 0;
1091     while(tag) {
1092         if(swf_isAllowedSpriteTag(tag)) {
1093             int write = 0;
1094             if(extractframes && is_in_range(frame, extractframes)) {
1095                 write = 1;
1096                 if(tag->id == ST_PLACEOBJECT || tag->id == ST_PLACEOBJECT2) {
1097                     depths[swf_GetDepth(tag)] = 1;
1098                 }
1099                 if(tag->id == ST_REMOVEOBJECT || tag->id == ST_REMOVEOBJECT2) {
1100                     int depth = swf_GetDepth(tag);
1101                     if(!depths[depth])
1102                         write = 0;
1103                     depths[swf_GetDepth(tag)] = 0;
1104                 }
1105             } else {
1106                 if((tag->id == ST_REMOVEOBJECT || tag->id == ST_REMOVEOBJECT2) &&
1107                     (depths[swf_GetDepth(tag)]) && hollow) {
1108                     write = 1;
1109                     depths[swf_GetDepth(tag)] = 0;
1110                 }
1111             }
1112             if(write) {
1113                 enumerateIDs(tag, idcallback);
1114                 found = 1;
1115                 tagused[tagnum] = 1;
1116             }
1117         }
1118
1119         if(tag->id == ST_SOUNDSTREAMHEAD ||
1120            tag->id == ST_SOUNDSTREAMHEAD2 ||
1121            tag->id == ST_SOUNDSTREAMBLOCK) {
1122             if(extractmp3)
1123                 handlesoundstream(tag);
1124         }
1125
1126         if(tag->id == ST_JPEGTABLES) {
1127             handlejpegtables(tag);
1128         }
1129
1130         if(swf_isDefiningTag(tag)) {
1131             int id = swf_GetDefineID(tag);
1132             tags[id] = tag;
1133             if(extractids && is_in_range(id, extractids)) {
1134                 used[id] = 5;
1135                 found = 1;
1136             }
1137             if(extractfontids && is_in_range(id, extractfontids)) {
1138                 handlefont(&swf, tag);
1139             }
1140             if(extractjpegids && is_in_range(id, extractjpegids)) {
1141                 handlejpeg(tag);
1142             }
1143             if(extractsoundids && is_in_range(id, extractsoundids)) {
1144                 handledefinesound(tag);
1145             }
1146 #ifdef _ZLIB_INCLUDED_
1147             if(extractpngids && is_in_range(id, extractpngids)) {
1148                 handlelossless(tag);
1149             }
1150 #endif
1151         }
1152         else if (tag->id == ST_SETBACKGROUNDCOLOR) {
1153             mainr = tag->data[0];
1154             maing = tag->data[1];
1155             mainb = tag->data[2];
1156         }
1157         else if(swf_isPlaceTag(tag) && tag->id != ST_PLACEOBJECT ) {
1158             char*name = swf_GetName(tag);
1159             if(name && extractname && !strcmp(name, extractname)) {
1160                 int id = swf_GetPlaceID(tag);
1161                 used[id] = 5;
1162                 found = 1;
1163                 if(originalplaceobjects) {
1164                     tagused[tagnum] = 1;
1165                 }
1166                 depths[swf_GetDepth(tag)] = 1;
1167                 extractname_id = id;
1168             }
1169         }
1170         else if(tag->id == ST_SHOWFRAME) {
1171             frame ++;
1172             if(hollow) {
1173                 tagused[tagnum] = 1;
1174                 found = 1;
1175             }
1176         }
1177
1178         if(tag->id == ST_DEFINESPRITE) {
1179             while(tag->id != ST_END) {
1180                 tag = tag->next;
1181                 tagnum ++;
1182             }
1183         }
1184         tag = tag->next;
1185         tagnum ++;
1186     }
1187     if (found)
1188         extractTag(&swf, destfilename);
1189
1190     if(mp3file) {
1191         fclose(mp3file);
1192     } else {
1193         if(extractmp3) {
1194             msg("<error> Didn't find a soundstream in file");
1195         }
1196     }
1197
1198     swf_FreeTags(&swf);
1199     return 0;
1200 }
1201