2 Allows to extract parts of the swf into a new file.
4 Part of the swftools package.
6 Copyright (c) 2001 Matthias Kramm <kramm@quiss.org>
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.
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.
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 */
25 #include "../lib/rfxswf.h"
26 #include "../lib/args.h"
27 #include "../lib/log.h"
31 #define _ZLIB_INCLUDED_
36 char * destfilename = "output.swf";
40 char* extractframes = 0;
41 char* extractjpegids = 0;
42 char* extractfontids = 0;
43 char* extractpngids = 0;
44 char* extractsoundids = 0;
47 char* extractname = 0;
50 char originalplaceobjects = 0;
54 struct options_t options[] =
73 int args_callback_option(char*name,char*val)
75 if(!strcmp(name, "V")) {
76 printf("swfextract - part of %s %s\n", PACKAGE, VERSION);
79 else if(!strcmp(name, "o")) {
83 else if(!strcmp(name, "i")) {
87 fprintf(stderr, "You can only supply either name or id\n");
92 else if(!strcmp(name, "n")) {
96 fprintf(stderr, "You can only supply either name or id\n");
101 else if(!strcmp(name, "v")) {
105 else if(!strcmp(name, "m")) {
110 else if(!strcmp(name, "j")) {
112 fprintf(stderr, "Only one --jpegs argument is allowed. (Try to use a range, e.g. -j 1,2,3)\n");
116 extractjpegids = val;
119 else if(!strcmp(name, "F")) {
121 fprintf(stderr, "Only one --font argument is allowed. (Try to use a range, e.g. -s 1,2,3)\n");
125 extractfontids = val;
128 else if(!strcmp(name, "s")) {
129 if(extractsoundids) {
130 fprintf(stderr, "Only one --sound argument is allowed. (Try to use a range, e.g. -s 1,2,3)\n");
134 extractsoundids = val;
137 #ifdef _ZLIB_INCLUDED_
138 else if(!strcmp(name, "p")) {
140 fprintf(stderr, "Only one --png argument is allowed. (Try to use a range, e.g. -p 1,2,3)\n");
148 else if(!strcmp(name, "f")) {
153 else if(!strcmp(name, "P")) {
154 originalplaceobjects = 1;
157 else if(!strcmp(name, "w")) {
162 printf("Unknown option: -%s\n", name);
168 int args_callback_longoption(char*name,char*val)
170 return args_long2shortoption(options, name, val);
172 void args_callback_usage(char*name)
174 printf("Usage: %s [-v] [-n name] [-ijf ids] file.swf\n", name);
175 printf("\t-v , --verbose\t\t\t Be more verbose\n");
176 printf("\t-o , --output filename\t\t set output filename\n");
177 printf("\t-V , --version\t\t\t Print program version and exit\n\n");
178 printf("SWF Subelement extraction:\n");
179 printf("\t-n , --name name\t\t instance name of the object (SWF Define) to extract\n");
180 printf("\t-i , --id ID\t\t\t ID of the object, shape or movieclip to extract\n");
181 printf("\t-f , --frame frames\t\t frame numbers to extract\n");
182 printf("\t-w , --hollow\t\t\t hollow mode: don't remove empty frames\n");
183 printf("\t \t\t\t (use with -f)\n");
184 printf("\t-P , --placeobject\t\t\t Insert original placeobject into output file\n");
185 printf("\t \t\t\t (use with -i)\n");
186 printf("SWF Font/Text extraction:\n");
187 printf("\t-F , --font ID\t\t\t Extract font(s)\n");
188 printf("Picture extraction:\n");
189 printf("\t-j , --jpeg ID\t\t\t Extract JPEG picture(s)\n");
190 #ifdef _ZLIB_INCLUDED_
191 printf("\t-p , --pngs ID\t\t\t Extract PNG picture(s)\n");
194 printf("Sound extraction:\n");
195 printf("\t-m , --mp3\t\t\t Extract main mp3 stream\n");
196 printf("\t-s , --sound ID\t\t\t Extract Sound(s)\n");
198 int args_callback_command(char*name,char*val)
201 fprintf(stderr, "Only one file allowed. You supplied at least two. (%s and %s)\n",
208 U8 mainr,maing,mainb;
209 /* 1 = used, not expanded,
211 5 = wanted, not expanded
218 int extractname_id = -1;
220 void idcallback(void*data)
222 if(!(used[GET16(data)]&1)) {
224 used[GET16(data)] |= 1;
228 void enumerateIDs(TAG*tag, void(*callback)(void*))
234 data = (U8*)malloc(len);
235 PUT16(data, (tag->id<<6)+63);
236 *(U8*)&data[2] = tag->len;
237 *(U8*)&data[3] = tag->len>>8;
238 *(U8*)&data[4] = tag->len>>16;
239 *(U8*)&data[5] = tag->len>>24;
240 memcpy(&data[6], tag->data, tag->len);
243 data = (U8*)malloc(len);
244 PUT16(data, (tag->id<<6)+tag->len);
245 memcpy(&data[2], tag->data, tag->len);
247 map_ids_mem(data, len, callback);
249 int num = swf_GetNumUsedIDs(tag);
250 int *ptr = malloc(sizeof(int)*num);
252 swf_GetUsedIDs(tag, ptr);
254 callback(&tag->data[ptr[t]]);
257 void extractTag(SWF*swf, char*filename)
269 memset(&newswf,0x00,sizeof(SWF)); // set global movie parameters
271 newswf.fileVersion = swf->fileVersion;
272 newswf.frameRate = swf->frameRate;
273 newswf.movieSize = swf->movieSize;
275 newswf.firstTag = swf_InsertTag(NULL,ST_SETBACKGROUNDCOLOR);
276 desttag = newswf.firstTag;
280 swf_SetRGB(desttag,&rgb);
282 swf_GetRect(0, &objectbbox);
286 for(t=0;t<65536;t++) {
287 if(used[t] && !(used[t]&2)) {
289 msg("<warning> ID %d is referenced, but never defined.", t);
290 } else if(tags[t]->id==ST_DEFINESPRITE) {
292 while(tag->id != ST_END)
294 enumerateIDs(tag, idcallback);
299 enumerateIDs(tags[t], idcallback);
306 srctag = swf->firstTag;
309 while(srctag && (srctag->id || sprite)) {
314 if(srctag->id == ST_END) {
317 if(srctag->id == ST_DEFINESPRITE)
319 if(swf_isDefiningTag(srctag)) {
320 int id = swf_GetDefineID(srctag);
324 b = swf_GetDefineBBox(srctag);
325 swf_ExpandRect2(&objectbbox, &b);
328 if (((((srctag->id == ST_PLACEOBJECT || srctag->id == ST_PLACEOBJECT2) && originalplaceobjects)
329 || srctag->id == ST_STARTSOUND) && (used[swf_GetPlaceID(srctag)]&4) ) ||
330 (swf_isPseudoDefiningTag(srctag) && used[swf_GetDefineID(srctag)]) ||
337 if(srctag->id == ST_REMOVEOBJECT) {
338 if(!used[swf_GetPlaceID(srctag)])
343 TAG*ttag = (TAG*)malloc(sizeof(TAG));
344 desttag = swf_InsertTag(desttag, srctag->id);
345 desttag->len = desttag->memsize = srctag->len;
346 desttag->data = malloc(srctag->len);
347 memcpy(desttag->data, srctag->data, srctag->len);
352 srctag = srctag->next;
355 if(!extractframes && !hollow) {
356 if(!originalplaceobjects && (extractids||extractname_id>=0)) {
359 if((objectbbox.xmin|objectbbox.ymin|objectbbox.xmax|objectbbox.ymax)!=0)
360 newswf.movieSize = objectbbox;
361 if(extractname_id>=0) {
362 desttag = swf_InsertTag(desttag, ST_PLACEOBJECT2);
363 swf_ObjectPlace(desttag, extractname_id, extractname_id, 0,0,extractname);
365 for(t=0;t<65536;t++) {
366 if(is_in_range(t, extractids)) {
367 desttag = swf_InsertTag(desttag, ST_PLACEOBJECT2);
368 swf_ObjectPlace(desttag, t, t, 0,0,0);
371 printf("warning! You should use the -P when extracting multiple objects\n");
376 desttag = swf_InsertTag(desttag,ST_SHOWFRAME);
378 desttag = swf_InsertTag(desttag,ST_END);
380 f = open(filename, O_TRUNC|O_WRONLY|O_CREAT|O_BINARY, 0644);
381 if FAILED(swf_WriteSWF(f,&newswf)) fprintf(stderr,"WriteSWF() failed.\n");
384 swf_FreeTags(&newswf); // cleanup
387 void listObjects(SWF*swf)
393 char*names[] = {"Shapes","MovieClips","JPEGs","PNGs","Sounds","Fonts"};
394 printf("Objects in file %s:\n",filename);
395 for(t=0;t<sizeof(names)/sizeof(names[0]);t++) {
402 (tag->id == ST_DEFINESHAPE ||
403 tag->id == ST_DEFINESHAPE2 ||
404 tag->id == ST_DEFINESHAPE3)) {
406 sprintf(text,"%d", swf_GetDefineID(tag));
409 if(tag->id == ST_DEFINESPRITE) {
412 sprintf(text,"%d", swf_GetDefineID(tag));
415 while(tag->id != ST_END)
419 if(t == 2 && (tag->id == ST_DEFINEBITS ||
420 tag->id == ST_DEFINEBITSJPEG2 ||
421 tag->id == ST_DEFINEBITSJPEG3)) {
423 sprintf(text,"%d", swf_GetDefineID(tag));
426 if(t == 3 && (tag->id == ST_DEFINEBITSLOSSLESS ||
427 tag->id == ST_DEFINEBITSLOSSLESS2)) {
429 sprintf(text,"%d", swf_GetDefineID(tag));
433 if(t == 4 && (tag->id == ST_DEFINESOUND)) {
435 sprintf(text,"%d", swf_GetDefineID(tag));
438 if(t == 5 && (tag->id == ST_DEFINEFONT || tag->id == ST_DEFINEFONT2)) {
440 sprintf(text,"%d", swf_GetDefineID(tag));
447 printf("%s: ", names[t]);
458 printf("Frames: 0-%d\n", frame);
460 printf("Frames: 0\n");
463 void handlefont(SWF*swf, TAG*tag)
468 char*filename = name;
471 id = swf_GetDefineID(tag);
472 sprintf(name, "font%d.swf", id);
474 filename = destfilename;
477 swf_FontExtract(swf, id, &f);
479 printf("Couldn't extract font %d\n", id);
483 swf_FontCreateLayout(f);
485 swf_WriteFont(f, filename);
492 void handlejpegtables(TAG*tag)
494 if(tag->id == ST_JPEGTABLES) {
495 jpegtables = tag->data;
496 jpegtablessize = tag->len;
500 FILE* save_fopen(char* name, char* mode)
502 FILE*fi = fopen(name, mode);
504 fprintf(stderr, "Error: Couldn't open %s\n", name);
510 int findjpegboundary(U8*data, int len)
525 /* extract jpeg data out of a tag */
526 void handlejpeg(TAG*tag)
529 char*filename = name;
532 sprintf(name, "pic%d.jpg", GET16(tag->data));
534 filename = destfilename;
535 if(!strcmp(filename,"output.swf"))
536 filename = "output.jpg";
538 /* swf jpeg images have two streams, which both start with ff d8 and
539 end with ff d9. The following code handles sorting the middle
540 <ff d9 ff d8> bytes out, so that one stream remains */
541 if(tag->id == ST_DEFINEBITS && tag->len>2 && jpegtables) {
542 fi = save_fopen(filename, "wb");
543 fwrite(jpegtables, 1, jpegtablessize-2, fi); //don't write end tag (ff,d8)
544 fwrite(&tag->data[2+2], tag->len-2-2, 1, fi); //don't write start tag (ff,d9)
547 else if(tag->id == ST_DEFINEBITSJPEG2 && tag->len>2) {
549 int pos = findjpegboundary(&tag->data[2], tag->len-2);
553 fi = save_fopen(filename, "wb");
554 fwrite(&tag->data[2], pos-2, 1, fi);
555 fwrite(&tag->data[pos+4], end-(pos+4), 1, fi);
558 else if(tag->id == ST_DEFINEBITSJPEG3 && tag->len>6) {
559 U32 end = GET32(&tag->data[2])+6;
560 int pos = findjpegboundary(&tag->data[6], tag->len-6);
564 fi = save_fopen(filename, "wb");
565 fwrite(&tag->data[6], pos-6, 1, fi);
566 fwrite(&tag->data[pos+4], end-(pos+4), 1, fi);
570 int id = GET16(tag->data);
571 fprintf(stderr, "Object %d is not a JPEG picture!\n",id);
576 #ifdef _ZLIB_INCLUDED_
579 static U32*crc32_table = 0;
580 static void make_crc32_table(void)
585 crc32_table = (U32*)malloc(1024);
587 for (t = 0; t < 256; t++) {
590 for (s = 0; s < 8; s++) {
591 c = (0xedb88320L*(c&1)) ^ (c >> 1);
596 static void png_write_byte(FILE*fi, U8 byte)
598 fwrite(&byte,1,1,fi);
599 mycrc32 = crc32_table[(mycrc32 ^ byte) & 0xff] ^ (mycrc32 >> 8);
601 static void png_start_chunk(FILE*fi, char*type, int len)
603 U8 mytype[4]={0,0,0,0};
604 U32 mylen = REVERSESWAP32(len);
605 memcpy(mytype,type,strlen(type));
606 fwrite(&mylen, 4, 1, fi);
608 png_write_byte(fi,mytype[0]);
609 png_write_byte(fi,mytype[1]);
610 png_write_byte(fi,mytype[2]);
611 png_write_byte(fi,mytype[3]);
613 static void png_write_bytes(FILE*fi, U8*bytes, int len)
617 png_write_byte(fi,bytes[t]);
619 static void png_write_dword(FILE*fi, U32 dword)
621 png_write_byte(fi,dword>>24);
622 png_write_byte(fi,dword>>16);
623 png_write_byte(fi,dword>>8);
624 png_write_byte(fi,dword);
626 static void png_end_chunk(FILE*fi)
628 U32 tmp = REVERSESWAP32((mycrc32^0xffffffff));
633 /* extract a lossless image (png) out of a tag
634 This routine was originally meant to be a one-pager. I just
635 didn't know png is _that_ much fun. :) -mk
637 void handlelossless(TAG*tag)
640 char*filename = name;
655 U8 head[] = {137,80,78,71,13,10,26,10};
657 char alpha = tag->id == ST_DEFINEBITSLOSSLESS2;
665 if(tag->id != ST_DEFINEBITSLOSSLESS &&
666 tag->id != ST_DEFINEBITSLOSSLESS2) {
667 int id = GET16(tag->data);
668 fprintf(stderr, "Object %d is not a PNG picture!\n",id);
673 format = swf_GetU8(tag);
674 if(format == 3) bpp = 8;
675 if(format == 4) bpp = 16;
676 if(format == 5) bpp = 32;
677 if(format!=3 && format!=5) {
679 fprintf(stderr, "Can't handle 16-bit palette images yet (image %d)\n",id);
681 fprintf(stderr, "Unknown image type %d in image %d\n", format, id);
684 width = swf_GetU16(tag);
685 height = swf_GetU16(tag);
686 if(format == 3) cols = swf_GetU8(tag) + 1;
687 // this is what format means according to the flash specification. (which is
689 // if(format == 4) cols = swf_GetU16(tag) + 1;
690 // if(format == 5) cols = swf_GetU32(tag) + 1;
693 msg("<verbose> Width %d", width);
694 msg("<verbose> Height %d", height);
695 msg("<verbose> Format %d", format);
696 msg("<verbose> Cols %d", cols);
697 msg("<verbose> Bpp %d", bpp);
699 datalen = (width*height*bpp/8+cols*8);
704 data = malloc(datalen);
705 error = uncompress (data, &datalen, &tag->data[tag->pos], tag->len-tag->pos);
706 } while(error == Z_BUF_ERROR);
708 fprintf(stderr, "Zlib error %d (image %d)\n", error, id);
711 msg("<verbose> Uncompressed image is %d bytes (%d colormap)", datalen, (3+alpha)*cols);
714 data2 = malloc(datalen2);
715 palette = (RGBA*)malloc(cols*sizeof(RGBA));
717 for(t=0;t<cols;t++) {
718 palette[t].r = data[pos++];
719 palette[t].g = data[pos++];
720 palette[t].b = data[pos++];
722 palette[t].a = data[pos++];
726 sprintf(name, "pic%d.png", id);
728 filename = destfilename;
729 if(!strcmp(filename,"output.swf"))
730 filename = "output.png";
732 fi = save_fopen(filename, "wb");
733 fwrite(head,sizeof(head),1,fi);
735 png_start_chunk(fi, "IHDR", 13);
736 png_write_dword(fi,width);
737 png_write_dword(fi,height);
738 png_write_byte(fi,8);
740 png_write_byte(fi,3); //indexed
742 png_write_byte(fi,2); //rgb
745 png_write_byte(fi,0); //compression mode
746 png_write_byte(fi,0); //filter mode
747 png_write_byte(fi,0); //interlace mode
751 png_start_chunk(fi, "PLTE", 768);
753 png_write_byte(fi,palette[t].r);
754 png_write_byte(fi,palette[t].g);
755 png_write_byte(fi,palette[t].b);
762 int srcwidth = width * (bpp/8);
763 datalen3 = width*height*4;
764 data3 = (U8*)malloc(datalen3);
765 for(y=0;y<height;y++)
767 data3[pos2++]=0; //filter type
769 // 32 bit to 24 bit "conversion"
770 for(x=0;x<width;x++) {
771 data3[pos2++]=data[pos+1];
772 data3[pos2++]=data[pos+2];
773 data3[pos2++]=data[pos+3];
774 pos+=4; //ignore padding byte
778 for(x=0;x<srcwidth;x++)
779 data3[pos2++]=data[pos++];
782 pos+=((srcwidth+3)&~3)-srcwidth; //align
787 if(compress (data2, &datalen2, data3, datalen3) != Z_OK) {
788 fprintf(stderr, "zlib error in pic %d\n", id);
791 msg("<verbose> Compressed data is %d bytes", datalen2);
792 png_start_chunk(fi, "IDAT", datalen2);
793 png_write_bytes(fi,data2,datalen2);
795 png_start_chunk(fi, "IEND", 0);
805 void handlesoundstream(TAG*tag)
807 char*filename = "output.mp3";
809 filename = destfilename;
810 if(!strcmp(filename,"output.swf"))
811 filename = "output.mp3";
814 case ST_SOUNDSTREAMHEAD:
815 if((tag->data[1]&0x30) == 0x20) { //mp3 compression
816 mp3file = fopen(filename, "wb");
817 msg("<notice> Writing mp3 data to %s",filename);
820 msg("<error> Soundstream is not mp3");
822 case ST_SOUNDSTREAMHEAD2:
823 if((tag->data[1]&0x30) == 0x20) {//mp3 compression
824 mp3file = fopen(filename, "wb");
825 msg("<notice> Writing mp3 data to %s",filename);
828 msg("<error> Soundstream is not mp3 (2)");
830 case ST_SOUNDSTREAMBLOCK:
832 fwrite(&tag->data[4],tag->len-4,1,mp3file);
837 void handledefinesound(TAG*tag)
845 id = swf_GetU16(tag); //id
846 sprintf(buf, "sound%d.mp3", id);
849 filename = destfilename;
850 if(!strcmp(filename,"output.swf"))
851 filename = "output.mp3";
853 flags = swf_GetU8(tag);
855 printf("Sorry, can only extract MP3 sounds. Sound %d is ADPCM or RAW.\n", id);
859 samples = swf_GetU32(tag);
861 swf_GetU16(tag); //(only for mp3) numsamples_seek
863 fi = save_fopen(filename, "wb");
864 fwrite(&tag->data[tag->pos], tag->len - tag->pos, 1, fi);
868 int main (int argc,char ** argv)
877 char listavailable = 0;
878 processargs(argc, argv);
880 if(!extractframes && !extractids && ! extractname && !extractjpegids && !extractpngids
881 && !extractmp3 && !extractsoundids && !extractfontids)
886 fprintf(stderr, "You must supply a filename.\n");
889 initLog(0,-1,0,0,-1, verbose);
891 f = open(filename,O_RDONLY|O_BINARY);
895 perror("Couldn't open file: ");
898 if (swf_ReadSWF(f,&swf) < 0)
900 fprintf(stderr, "%s is not a valid SWF file or contains errors.\n",filename);
919 tagused = (char*)malloc(tagnum);
920 memset(tagused, 0, tagnum);
921 memset(used, 0, 65536);
922 memset(depths, 0, 65536);
927 if(swf_isAllowedSpriteTag(tag)) {
929 if(extractframes && is_in_range(frame, extractframes)) {
931 if(tag->id == ST_PLACEOBJECT || tag->id == ST_PLACEOBJECT2) {
932 depths[swf_GetDepth(tag)] = 1;
934 if(tag->id == ST_REMOVEOBJECT || tag->id == ST_REMOVEOBJECT2) {
935 int depth = swf_GetDepth(tag);
938 depths[swf_GetDepth(tag)] = 0;
941 if((tag->id == ST_REMOVEOBJECT || tag->id == ST_REMOVEOBJECT2) &&
942 (depths[swf_GetDepth(tag)]) && hollow) {
944 depths[swf_GetDepth(tag)] = 0;
948 enumerateIDs(tag, idcallback);
954 if(tag->id == ST_SOUNDSTREAMHEAD ||
955 tag->id == ST_SOUNDSTREAMHEAD2 ||
956 tag->id == ST_SOUNDSTREAMBLOCK) {
958 handlesoundstream(tag);
961 if(tag->id == ST_JPEGTABLES)
962 handlejpegtables(tag);
964 if(swf_isDefiningTag(tag)) {
965 int id = swf_GetDefineID(tag);
967 if(extractids && is_in_range(id, extractids)) {
971 if(extractfontids && is_in_range(id, extractfontids)) {
972 handlefont(&swf, tag);
974 if(extractjpegids && is_in_range(id, extractjpegids)) {
977 if(extractsoundids && is_in_range(id, extractsoundids)) {
978 handledefinesound(tag);
980 #ifdef _ZLIB_INCLUDED_
981 if(extractpngids && is_in_range(id, extractpngids)) {
986 else if (tag->id == ST_SETBACKGROUNDCOLOR) {
987 mainr = tag->data[0];
988 maing = tag->data[1];
989 mainb = tag->data[2];
991 else if(tag->id == ST_PLACEOBJECT2) {
992 char*name = swf_GetName(tag);
993 if(name && extractname && !strcmp(name, extractname)) {
994 int id = swf_GetPlaceID(tag);
998 depths[swf_GetDepth(tag)] = 1;
1002 else if(tag->id == ST_SHOWFRAME) {
1005 tagused[tagnum] = 1;
1010 if(tag->id == ST_DEFINESPRITE) {
1011 while(tag->id != ST_END) {
1020 extractTag(&swf, destfilename);