1 /* vi: set sts=2 sw=2 :*/
4 Library for creating and reading SWF files or parts of it.
5 There's a module directory which provides some extended functionality.
6 Most modules are included at the bottom of this file.
8 Part of the swftools package.
10 Copyright (c) 2000-2003 Rainer Böhme <rfxswf@reflex-studio.de>
11 Copyright (c) 2003 Matthias Kramm <kramm@quiss.org>
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
33 #ifndef RFXSWF_DISABLESOUND
35 #include "lame/lame.h"
53 #define MALLOC_SIZE 128
54 #define INSERT_RFX_TAG
56 #define MEMSIZE(l) (((l/MALLOC_SIZE)+1)*MALLOC_SIZE)
58 // inline wrapper functions
60 TAG * swf_NextTag(TAG * t) { return t->next; }
61 TAG * swf_PrevTag(TAG * t) { return t->prev; }
62 U16 swf_GetTagID(TAG * t) { return t->id; }
63 U32 swf_GetTagLen(TAG * t) { return t->len; }
64 U8* swf_GetTagLenPtr(TAG * t) { return &(t->data[t->len]); }
65 U32 swf_GetTagPos(TAG * t) { return t->pos; }
67 void swf_SetTagPos(TAG * t,U32 pos)
68 { swf_ResetReadBits(t);
69 if (pos<=t->len) t->pos = pos;
72 fprintf(stderr,"SetTagPos(%d) out of bounds: TagID = %i\n",pos, t->id);
77 char* swf_GetString(TAG*t)
80 while(t->pos < t->len && swf_GetU8(t));
81 /* make sure we always have a trailing zero byte */
82 if(t->pos == t->len) {
83 if(t->len == t->memsize) {
84 swf_ResetWriteBits(t);
90 return (char*)&(t->data[pos]);
94 { swf_ResetReadBits(t);
97 { fprintf(stderr,"GetU8() out of bounds: TagID = %i\n",t->id);
101 return t->data[t->pos++];
104 U16 swf_GetU16(TAG * t)
106 swf_ResetReadBits(t);
108 if (t->pos>(t->len-2))
109 { fprintf(stderr,"GetU16() out of bounds: TagID = %i\n",t->id);
113 res = t->data[t->pos] | (t->data[t->pos+1]<<8);
118 U32 swf_GetU32(TAG * t)
120 swf_ResetReadBits(t);
122 if (t->pos>(t->len-4))
123 { fprintf(stderr,"GetU32() out of bounds: TagID = %i\n",t->id);
127 res = t->data[t->pos] | (t->data[t->pos+1]<<8) |
128 (t->data[t->pos+2]<<16) | (t->data[t->pos+3]<<24);
133 int swf_GetBlock(TAG * t,U8 * b,int l)
134 // returns number of bytes written (<=l)
135 // b = NULL -> skip data
136 { swf_ResetReadBits(t);
137 if ((t->len-t->pos)<l) l=t->len-t->pos;
138 if (b && l) memcpy(b,&t->data[t->pos],l);
143 int swf_SetBlock(TAG * t,const U8 * b,int l)
144 // Appends Block to the end of Tagdata, returns size
145 { U32 newlen = t->len + l;
146 swf_ResetWriteBits(t);
147 if (newlen>t->memsize)
148 { U32 newmem = MEMSIZE(newlen);
149 U8 * newdata = (U8*)(rfx_realloc(t->data,newmem));
153 if (b) memcpy(&t->data[t->len],b,l);
154 else memset(&t->data[t->len],0x00,l);
159 int swf_SetU8(TAG * t,U8 v)
160 { swf_ResetWriteBits(t);
161 if ((t->len+1)>t->memsize) return (swf_SetBlock(t,&v,1)==1)?0:-1;
162 t->data[t->len++] = v;
166 int swf_SetU16(TAG * t,U16 v)
171 swf_ResetWriteBits(t);
172 if ((t->len+2)>t->memsize) return (swf_SetBlock(t,a,2)==2)?0:-1;
173 t->data[t->len++] = a[0];
174 t->data[t->len++] = a[1];
177 void swf_SetS16(TAG * t,int v)
179 if(v>32767 || v<-32768) {
180 fprintf(stderr, "Warning: S16 overflow: %d\n", v);
182 swf_SetU16(t, (S16)v);
185 int swf_SetU32(TAG * t,U32 v)
187 a[0] = v&0xff; // to ensure correct handling of non-intel byteorder
192 swf_ResetWriteBits(t);
193 if ((t->len+4)>t->memsize) return (swf_SetBlock(t,a,4)==4)?0:-1;
194 t->data[t->len++] = a[0];
195 t->data[t->len++] = a[1];
196 t->data[t->len++] = a[2];
197 t->data[t->len++] = a[3];
201 U32 swf_GetBits(TAG * t,int nbits)
203 if (!nbits) return 0;
204 if (!t->readBit) t->readBit = 0x80;
209 { fprintf(stderr,"GetBits() out of bounds: TagID = %i, pos=%d, len=%d\n",t->id, t->pos, t->len);
210 int i,m=t->len>10?10:t->len;
212 fprintf(stderr, "(%d)%02x ", i, t->data[i]);
214 fprintf(stderr, "\n");
218 if (t->data[t->pos]&t->readBit) res|=1;
222 { if (nbits) t->readBit = 0x80;
229 S32 swf_GetSBits(TAG * t,int nbits)
230 { U32 res = swf_GetBits(t,nbits);
231 if (res&(1<<(nbits-1))) res|=(0xffffffff<<nbits);
235 U32 reader_GetBits(reader_t*reader, int nbits)
236 { return reader_readbits(reader, nbits);
238 S32 reader_GetSBits(reader_t*reader, int nbits)
239 { U32 res = reader_readbits(reader, nbits);
240 if (res&(1<<(nbits-1))) res|=(0xffffffff<<nbits);
244 int swf_SetBits(TAG * t,U32 v,int nbits)
245 { U32 bm = 1<<(nbits-1);
249 { if (FAILED(swf_SetU8(t,0))) return -1;
252 if (v&bm) t->data[t->len-1] |= t->writeBit;
260 // Advanced Data Access Functions
262 double swf_GetFixed(TAG * t)
264 U16 low = swf_GetU16(t);
265 U16 high = swf_GetU16(t);
266 return high + low*(1/65536.0);
268 void swf_SetFixed(TAG * t, double f)
270 U16 fr = (U16)((f-(int)f)*65536);
272 swf_SetU16(t, (U16)f - (f<0 && fr!=0));
274 float swf_GetFixed8(TAG * t)
276 U8 low = swf_GetU8(t);
277 U8 high = swf_GetU8(t);
278 return (float)(high + low*(1/256.0));
280 void swf_SetFixed8(TAG * t, float f)
282 U8 fr = (U8)((f-(int)f)*256);
284 swf_SetU8(t, (U8)f - (f<0 && fr!=0));
287 U32 swf_GetU30(TAG*tag)
293 U8 b = swf_GetU8(tag);
297 if(!(b&128) || shift>=32)
300 /*int nr2= swf_SetU30(0, s);
302 printf("Unsigned value %d stored in %d bytes, I'd store it in %d bytes\n", s, nr, nr2);
307 int swf_SetU30(TAG*tag, U32 u)
312 swf_SetU8(tag, (u&~0x7f?0x80:0) | (u&0x7F));
319 void swf_SetABCU32(TAG*tag, U32 u)
322 swf_SetU8(tag, (u&~0x7f?0x80:0) | (u&0x7F));
326 U32 swf_GetABCU32(TAG*tag)
328 return swf_GetU30(tag);
330 void swf_SetABCS32(TAG*tag, S32 v)
332 swf_SetABCU32(tag, v);
334 S32 swf_GetABCS32(TAG*tag)
336 return swf_GetABCU32(tag);
341 /*The AVM2 spec is just plain wrong, claiming that S32 values are sign
342 extended. They're not.
343 This wastes up to 4 bytes for every negative value. */
345 void swf_SetABCS32(TAG*tag, S32 s)
347 printf("write S32: %d\n", s);
349 U8 sign = s<0?0x40:0;
355 if(s==neg && vsign==sign) {
356 /* if the value we now write has the same sign as s
357 and all the remaining bits are equal to the sign of s
360 printf("put %02x\n", val);
363 swf_SetU8(tag, 0x80 | val);
364 printf("put %02x\n", 0x80|val);
368 int swf_GetS30(TAG*tag)
374 U8 b = swf_GetU8(tag);
376 nt i,m=t->len>10?10:t->len;
378 fprintf(stderr, "%02x ", t->data[i]);
380 fprintf(stderr, "\n");
383 if(!(b&128) || shift>=32) {
386 s|=0xffffffff<<shift;
391 /* It's not uncommon for other applications (Flex for all negative numbers, and
392 Flash for -1) to generate a lot more bytes than would be necessary.
393 int nr2= swf_SetS30(0, s);
395 printf("Signed value %d stored in %d bytes, I'd store it in %d bytes\n", s, nr, nr2);
401 int swf_SetU30String(TAG*tag, const char*str, int l)
404 len+=swf_SetU30(tag, l);
406 swf_SetBlock(tag, (void*)str, l);
409 float swf_GetF16(TAG * t)
413 U16 f1 = swf_GetU16(t);
415 U32 f2 = (f1&0x8000)<<16; //sign
416 f2 |= ((f1&0x7c00)<<13)+(0x40000000-(0x4000<<13)); //exp
417 f2 |= (f1&0x03ff)<<13; //mantissa
420 void swf_SetF16(TAG * t, float f)
423 U16 f2 = (f1>>16)&0x8000;
424 int exp = ((f1>>23)&0xff)-0x80+0x10;
427 fprintf(stderr, "Exponent underflow in FLOAT16 encoding\n");
430 fprintf(stderr, "Exponent overflow in FLOAT16 encoding\n");
433 f2 |= (f1>>13)&0x3ff;
437 double swf_GetD64(TAG*tag)
439 /* FIXME: this is not big-endian compatible */
440 double value = *(double*)&tag->data[tag->pos];
445 int swf_SetD64(TAG*tag, double v)
447 /* FIXME: this is not big-endian compatible */
448 swf_SetU32(tag, ((U32*)&v)[0]);
449 swf_SetU32(tag, ((U32*)&v)[1]);
452 int swf_GetU24(TAG*tag)
454 int b1 = swf_GetU8(tag);
455 int b2 = swf_GetU8(tag);
456 int b3 = swf_GetU8(tag);
457 return b3<<16|b2<<8|b1;
459 int swf_GetS24(TAG*tag)
461 int b1 = swf_GetU8(tag);
462 int b2 = swf_GetU8(tag);
463 int b3 = swf_GetU8(tag);
465 return -1-((b3<<16|b2<<8|b1)^0xffffff);
467 return b3<<16|b2<<8|b1;
470 int swf_SetU24(TAG*tag, U32 v)
474 fprintf(stderr, "Error: Overflow in swf_SetU24()\n");
476 swf_SetU8(tag, v>>8);
477 swf_SetU8(tag, v>>16);
481 int swf_SetS24(TAG*tag, U32 v)
485 return swf_SetU24(tag, v);
486 if((v&0xff000000)!=0xff000000) {
487 fprintf(stderr, "Error: Overflow in swf_SetS24()\n");
490 swf_SetU8(tag, v>>8);
491 swf_SetU8(tag, v>>16);
497 int swf_SetRGB(TAG * t,RGBA * col)
500 { swf_SetU8(t,col->r);
503 } else swf_SetBlock(t,NULL,3);
506 void swf_GetRGB(TAG * t, RGBA * col)
511 col->r = swf_GetU8(t);
512 col->g = swf_GetU8(t);
513 col->b = swf_GetU8(t);
517 int swf_SetRGBA(TAG * t,RGBA * col)
520 { swf_SetU8(t,col->r);
524 } else swf_SetBlock(t,NULL,4);
527 void swf_GetRGBA(TAG * t, RGBA * col)
532 col->r = swf_GetU8(t);
533 col->g = swf_GetU8(t);
534 col->b = swf_GetU8(t);
535 col->a = swf_GetU8(t);
538 void swf_GetGradient(TAG * tag, GRADIENT * gradient, char alpha)
542 memset(gradient, 0, sizeof(GRADIENT));
545 U8 num = swf_GetU8(tag) & 15;
548 gradient->rgba = (RGBA*)rfx_calloc(sizeof(RGBA)*gradient->num);
549 gradient->ratios = (U8*)rfx_calloc(sizeof(gradient->ratios[0])*gradient->num);
553 U8 ratio = swf_GetU8(tag);
556 swf_GetRGB(tag, &color);
558 swf_GetRGBA(tag, &color);
560 gradient->ratios[t] = ratio;
561 gradient->rgba[t] = color;
566 void swf_SetGradient(TAG * tag, GRADIENT * gradient, char alpha)
570 memset(gradient, 0, sizeof(GRADIENT));
573 swf_SetU8(tag, gradient->num);
574 for(t=0; t<8 && t<gradient->num; t++)
576 swf_SetU8(tag, gradient->ratios[t]);
578 swf_SetRGB(tag, &gradient->rgba[t]);
580 swf_SetRGBA(tag, &gradient->rgba[t]);
584 void swf_FreeGradient(GRADIENT* gradient)
587 rfx_free(gradient->ratios);
589 rfx_free(gradient->rgba);
590 memset(gradient, 0, sizeof(GRADIENT));
593 int swf_CountUBits(U32 v,int nbits)
596 if(v == 0x00000000) n = 0;
602 return (n>nbits)?n:nbits;
605 int swf_CountBits(U32 v,int nbits)
609 { if(v == 0xffffffff) n = 1;
617 { if(v == 0x00000000) n = 0;
624 return (n>nbits)?n:nbits;
627 int swf_GetRect(TAG * t,SRECT * r)
630 if(!t) {r->xmin=r->xmax=r->ymin=r->ymax=0;return 0;}
632 nbits = (int) swf_GetBits(t,5);
633 r->xmin = swf_GetSBits(t,nbits);
634 r->xmax = swf_GetSBits(t,nbits);
635 r->ymin = swf_GetSBits(t,nbits);
636 r->ymax = swf_GetSBits(t,nbits);
640 int reader_GetRect(reader_t*reader,SRECT * r)
644 nbits = (int) reader_GetBits(reader,5);
645 r->xmin = reader_GetSBits(reader,nbits);
646 r->xmax = reader_GetSBits(reader,nbits);
647 r->ymin = reader_GetSBits(reader,nbits);
648 r->ymax = reader_GetSBits(reader,nbits);
652 int swf_SetRect(TAG * t,SRECT * r)
655 nbits = swf_CountBits(r->xmin,0);
656 nbits = swf_CountBits(r->xmax,nbits);
657 nbits = swf_CountBits(r->ymin,nbits);
658 nbits = swf_CountBits(r->ymax,nbits);
660 fprintf(stderr, "rfxswf: Warning: num_bits overflow in swf_SetRect\n");
664 swf_SetBits(t,nbits,5);
665 swf_SetBits(t,r->xmin,nbits);
666 swf_SetBits(t,r->xmax,nbits);
667 swf_SetBits(t,r->ymin,nbits);
668 swf_SetBits(t,r->ymax,nbits);
673 SRECT swf_ClipRect(SRECT border, SRECT r)
675 if(r.xmax > border.xmax) r.xmax = border.xmax;
676 if(r.ymax > border.ymax) r.ymax = border.ymax;
677 if(r.xmax < border.xmin) r.xmax = border.xmin;
678 if(r.ymax < border.ymin) r.ymax = border.ymin;
680 if(r.xmin > border.xmax) r.xmin = border.xmax;
681 if(r.ymin > border.ymax) r.ymin = border.ymax;
682 if(r.xmin < border.xmin) r.xmin = border.xmin;
683 if(r.ymin < border.ymin) r.ymin = border.ymin;
687 void swf_ExpandRect(SRECT*src, SPOINT add)
689 if((src->xmin | src->ymin | src->xmax | src->ymax)==0) {
694 if((add.x|add.y) == 0) src->xmax++; //make sure the bbox is not NULL anymore
697 if(add.x < src->xmin)
699 if(add.x > src->xmax)
701 if(add.y < src->ymin)
703 if(add.y > src->ymax)
706 void swf_ExpandRect2(SRECT*src, SRECT*add)
708 if((add->xmin | add->ymin | add->xmax | add->ymax)==0)
710 if((src->xmin | src->ymin | src->xmax | src->ymax)==0)
712 if(add->xmin < src->xmin)
713 src->xmin = add->xmin;
714 if(add->ymin < src->ymin)
715 src->ymin = add->ymin;
716 if(add->xmax > src->xmax)
717 src->xmax = add->xmax;
718 if(add->ymax > src->ymax)
719 src->ymax = add->ymax;
721 void swf_ExpandRect3(SRECT*src, SPOINT center, int radius)
723 if((src->xmin | src->ymin | src->xmax | src->ymax)==0) {
724 src->xmin = center.x-radius;
725 src->ymin = center.y-radius;
726 src->xmax = center.x+radius;
727 src->ymax = center.y+radius;
728 if((center.x|center.y|radius) == 0) src->xmax++; //make sure the bbox is not NULL anymore
731 if(center.x - radius < src->xmin)
732 src->xmin = center.x - radius;
733 if(center.x + radius > src->xmax)
734 src->xmax = center.x + radius;
735 if(center.y - radius < src->ymin)
736 src->ymin = center.y - radius;
737 if(center.y + radius > src->ymax)
738 src->ymax = center.y + radius;
740 SPOINT swf_TurnPoint(SPOINT p, MATRIX* m)
743 r.x = (int)(m->sx*(1/65536.0)*p.x + m->r1*(1/65536.0)*p.y + 0.5) + m->tx;
744 r.y = (int)(m->r0*(1/65536.0)*p.x + m->sy*(1/65536.0)*p.y + 0.5) + m->ty;
747 SRECT swf_TurnRect(SRECT r, MATRIX* m)
750 SPOINT p1,p2,p3,p4,pp1,pp2,pp3,pp4;
753 p1.x = r.xmin;p1.y = r.ymin;
754 p2.x = r.xmax;p2.y = r.ymin;
755 p3.x = r.xmin;p3.y = r.ymax;
756 p4.x = r.xmax;p4.y = r.ymax;
757 pp1 = swf_TurnPoint(p1, m);
758 pp2 = swf_TurnPoint(p2, m);
759 pp3 = swf_TurnPoint(p3, m);
760 pp4 = swf_TurnPoint(p4, m);
761 g.xmin = g.xmax = pp1.x;
762 g.ymin = g.ymax = pp1.y;
763 swf_ExpandRect(&g, pp2);
764 swf_ExpandRect(&g, pp3);
765 swf_ExpandRect(&g, pp4);
770 int swf_GetMatrix(TAG * t,MATRIX * m)
777 { m->sx = m->sy = 0x10000;
783 swf_ResetReadBits(t);
785 if (swf_GetBits(t,1))
786 { nbits = swf_GetBits(t,5);
787 m->sx = swf_GetSBits(t,nbits);
788 m->sy = swf_GetSBits(t,nbits);
790 else m->sx = m->sy = 0x10000;
792 if (swf_GetBits(t,1))
793 { nbits = swf_GetBits(t,5);
794 m->r0 = swf_GetSBits(t,nbits);
795 m->r1 = swf_GetSBits(t,nbits);
797 else m->r0 = m->r1 = 0x0;
799 nbits = swf_GetBits(t,5);
800 m->tx = swf_GetSBits(t,nbits);
801 m->ty = swf_GetSBits(t,nbits);
806 int swf_SetMatrix(TAG * t,MATRIX * m)
812 ma.sx = ma.sy = 0x10000;
817 swf_ResetWriteBits(t);
819 if ((m->sx==0x10000)&&(m->sy==0x10000)) swf_SetBits(t,0,1);
821 { swf_SetBits(t,1,1);
822 nbits = swf_CountBits(m->sx,0);
823 nbits = swf_CountBits(m->sy,nbits);
825 /* TODO: happens on AMD64 systems for normal values? */
826 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
829 swf_SetBits(t,nbits,5);
830 swf_SetBits(t,m->sx,nbits);
831 swf_SetBits(t,m->sy,nbits);
834 if ((!m->r0)&&(!m->r1)) swf_SetBits(t,0,1);
836 { swf_SetBits(t,1,1);
837 nbits = swf_CountBits(m->r0,0);
838 nbits = swf_CountBits(m->r1,nbits);
840 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
843 swf_SetBits(t,nbits,5);
844 swf_SetBits(t,m->r0,nbits);
845 swf_SetBits(t,m->r1,nbits);
848 nbits = swf_CountBits(m->tx,0);
849 nbits = swf_CountBits(m->ty,nbits);
851 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
854 swf_SetBits(t,nbits,5);
855 swf_SetBits(t,m->tx,nbits);
856 swf_SetBits(t,m->ty,nbits);
861 int swf_GetCXForm(TAG * t,CXFORM * cx,U8 alpha)
869 cx->a0 = cx->r0 = cx->g0 = cx->b0 = 256;
870 cx->a1 = cx->r1 = cx->g1 = cx->b1 = 0;
874 swf_ResetReadBits(t);
875 hasadd = swf_GetBits(t,1);
876 hasmul = swf_GetBits(t,1);
877 nbits = swf_GetBits(t,4);
880 { cx->r0 = (S16)swf_GetSBits(t,nbits);
881 cx->g0 = (S16)swf_GetSBits(t,nbits);
882 cx->b0 = (S16)swf_GetSBits(t,nbits);
884 cx->a0 = (S16)swf_GetSBits(t,nbits);
888 { cx->r1 = (S16)swf_GetSBits(t,nbits);
889 cx->g1 = (S16)swf_GetSBits(t,nbits);
890 cx->b1 = (S16)swf_GetSBits(t,nbits);
892 cx->a1 = (S16)swf_GetSBits(t,nbits);
898 int swf_SetCXForm(TAG * t,CXFORM * cx,U8 alpha)
906 cx->a0 = cx->r0 = cx->g0 = cx->b0 = 256;
907 cx->a1 = cx->r1 = cx->g1 = cx->b1 = 0;
917 hasmul = (cx->a0!=256)||(cx->r0!=256)||(cx->g0!=256)||(cx->b0!=256);
918 hasadd = cx->a1|cx->r1|cx->g1|cx->b1;
921 { if (alpha) nbits = swf_CountBits((S32)cx->a0,nbits);
922 nbits = swf_CountBits((S32)cx->r0,nbits);
923 nbits = swf_CountBits((S32)cx->g0,nbits);
924 nbits = swf_CountBits((S32)cx->b0,nbits);
928 { if (alpha) nbits = swf_CountBits((S32)cx->a1,nbits);
929 nbits = swf_CountBits((S32)cx->r1,nbits);
930 nbits = swf_CountBits((S32)cx->g1,nbits);
931 nbits = swf_CountBits((S32)cx->b1,nbits);
934 swf_ResetWriteBits(t);
935 swf_SetBits(t,hasadd?1:0,1);
936 swf_SetBits(t,hasmul?1:0,1);
937 swf_SetBits(t,nbits,4);
940 { swf_SetBits(t,cx->r0,nbits);
941 swf_SetBits(t,cx->g0,nbits);
942 swf_SetBits(t,cx->b0,nbits);
943 if (alpha) swf_SetBits(t,cx->a0,nbits);
947 { swf_SetBits(t,cx->r1,nbits);
948 swf_SetBits(t,cx->g1,nbits);
949 swf_SetBits(t,cx->b1,nbits);
950 if (alpha) swf_SetBits(t,cx->a1,nbits);
956 //int swf_GetPoint(TAG * t,SPOINT * p) { return 0; }
957 //int swf_SetPoint(TAG * t,SPOINT * p) { return 0; }
959 void swf_SetPassword(TAG * t, const char * password)
961 /* WARNING: crypt_md5 is not reentrant */
965 #if defined(HAVE_LRAND48) && defined(HAVE_SRAND48) && defined(HAVE_TIME_H) && defined(HAVE_TIME)
967 salt[0] = "abcdefghijklmnopqrstuvwxyz0123456789"[lrand48()%36];
968 salt[1] = "abcdefghijklmnopqrstuvwxyz0123456789"[lrand48()%36];
972 fprintf(stderr, "rfxswf: Warning- no usable random generator found\n");
973 fprintf(stderr, "Your password will be vulnerable to dictionary attacks\n");
977 md5string = crypt_md5(password, salt);
980 swf_SetString(t, md5string);
983 void swf_SetString(TAG*t, const char* s)
988 swf_SetBlock(t,(U8*)s,strlen(s)+1);
992 int swf_VerifyPassword(TAG * t, const char * password)
994 char*md5string1, *md5string2;
999 if(t->len >= 5 && t->pos==0 &&
1004 printf("%d %d %d %d\n", t->len, t->pos, t->data[0], t->data[1]);
1007 md5string1 = swf_GetString(t);
1009 if(strncmp(md5string1, "$1$",3 )) {
1010 fprintf(stderr, "rfxswf: no salt in pw string\n");
1013 x = strchr(md5string1+3, '$');
1015 fprintf(stderr, "rfxswf: invalid salt format in pw string\n");
1018 n = x-(md5string1+3);
1019 salt = (char*)rfx_alloc(n+1);
1020 memcpy(salt, md5string1+3, n);
1023 md5string2 = crypt_md5(password, salt);
1025 if(strcmp(md5string1, md5string2) != 0)
1030 // Tag List Manipulating Functions
1032 TAG * swf_InsertTag(TAG * after,U16 id)
1035 t = (TAG *)rfx_calloc(sizeof(TAG));
1041 t->next = after->next;
1043 if (t->next) t->next->prev = t;
1048 TAG * swf_InsertTagBefore(SWF* swf, TAG * before,U16 id)
1051 t = (TAG *)rfx_calloc(sizeof(TAG));
1057 t->prev = before->prev;
1059 if (t->prev) t->prev->next = t;
1061 if(swf && swf->firstTag == before) {
1067 void swf_ClearTag(TAG * t)
1069 if (t->data) rfx_free(t->data);
1078 void swf_ResetTag(TAG*tag, U16 id)
1080 tag->len = tag->pos = tag->readBit = tag->writeBit = 0;
1084 TAG* swf_CopyTag(TAG*tag, TAG*to_copy)
1086 tag = swf_InsertTag(tag, to_copy->id);
1087 swf_SetBlock(tag, to_copy->data, to_copy->len);
1091 TAG* swf_DeleteTag(SWF*swf, TAG * t)
1095 if (swf && swf->firstTag==t)
1096 swf->firstTag = t->next;
1097 if (t->prev) t->prev->next = t->next;
1098 if (t->next) t->next->prev = t->prev;
1100 if (t->data) rfx_free(t->data);
1105 TAG * swf_ReadTag(reader_t*reader, TAG * prev)
1111 if (reader->read(reader, &raw, 2) !=2 ) return NULL;
1119 if (reader->read(reader, &len, 4) != 4) return NULL;
1123 if (id==ST_DEFINESPRITE) len = 2*sizeof(U16);
1124 // Sprite handling fix: Flatten sprite tree
1126 t = (TAG *)rfx_calloc(sizeof(TAG));
1132 { t->data = (U8*)rfx_alloc(t->len);
1133 t->memsize = t->len;
1134 if (reader->read(reader, t->data, t->len) != t->len) {
1135 fprintf(stderr, "rfxswf: Warning: Short read (tagid %d). File truncated?\n", t->id);
1136 free(t->data);t->data=0;
1151 int swf_DefineSprite_GetRealSize(TAG * t);
1153 int swf_WriteTag2(writer_t*writer, TAG * t)
1154 // returns tag length in bytes (incl. Header), -1 = Error
1155 // writer = 0 -> no output
1162 len = (t->id==ST_DEFINESPRITE)?swf_DefineSprite_GetRealSize(t):t->len;
1164 short_tag = len<0x3f&&
1165 (t->id!=ST_DEFINEBITSLOSSLESS&&t->id!=ST_DEFINEBITSLOSSLESS2&&t->id!=ST_SOUNDSTREAMBLOCK&&
1166 t->id!=ST_DEFINEBITSJPEG&&t->id!=ST_DEFINEBITSJPEG2&&t->id!=ST_DEFINEBITSJPEG3);
1171 int oldpos = writer->pos;
1175 { raw[0] = SWAP16(len|((t->id&0x3ff)<<6));
1176 if (writer->write(writer,raw,2)!=2)
1179 fprintf(stderr,"WriteTag() failed: Short Header.\n");
1186 raw[0] = SWAP16((t->id<<6)|0x3f);
1187 if (writer->write(writer,raw,2)!=2)
1190 fprintf(stderr,"WriteTag() failed: Long Header (1).\n");
1196 if (writer->write(writer,&len,4)!=4)
1199 fprintf(stderr,"WriteTag() failed: Long Header (2).\n");
1206 { if (writer->write(writer,t->data,t->len)!=t->len)
1209 fprintf(stderr,"WriteTag() failed: Data.\n");
1215 else if (t->len) fprintf(stderr,"WriteTag(): Tag Data Error, id=%i\n",t->id);
1219 writer->flush(writer);
1220 printf("TAG %s costs %d bytes\n", swf_TagGetName(t), writer->pos-oldpos);
1224 return t->len+(short_tag?2:6);
1227 int swf_WriteTag(int handle, TAG * t)
1232 return swf_WriteTag2(0, t);
1233 writer_init_filewriter(&writer, handle);
1234 len = swf_WriteTag2(&writer, t);
1235 writer.finish(&writer);
1239 int swf_DefineSprite_GetRealSize(TAG * t)
1240 // Sprite Handling: Helper function to pack DefineSprite-Tag
1242 if(len>4) { // folded sprite
1246 { t = swf_NextTag(t);
1247 if (t && t->id!=ST_DEFINESPRITE) len += swf_WriteTag(-1, t);
1249 } while (t&&(t->id!=ST_END));
1253 void swf_UnFoldSprite(TAG * t)
1258 U16 spriteid,spriteframes;
1260 if(t->id!=ST_DEFINESPRITE)
1262 if(t->len<=4) // not folded
1267 spriteid = swf_GetU16(t); //id
1268 spriteframes = swf_GetU16(t); //frames
1275 tmp = swf_GetU16(t);
1280 if(id == ST_DEFINESPRITE && len<=4)
1284 len = swf_GetU32(t);
1285 it = swf_InsertTag(next, id);
1290 { it->data = (U8*)rfx_alloc(it->len);
1291 it->memsize = it->len;
1292 swf_GetBlock(t, it->data, it->len);
1299 rfx_free(t->data); t->data = 0;
1300 t->memsize = t->len = t->pos = 0;
1302 swf_SetU16(t, spriteid);
1303 swf_SetU16(t, spriteframes);
1306 void swf_FoldSprite(TAG * t)
1311 if(t->id!=ST_DEFINESPRITE)
1314 fprintf(stderr, "Error: Sprite has no ID!");
1318 /* sprite is already folded */
1325 t->len = t->pos = t->memsize = 0;
1330 t = swf_NextTag(sprtag);
1335 if(t->id==ST_SHOWFRAME) frames++;
1336 if(t->id == ST_DEFINESPRITE && t->len<=4)
1341 } while(t && level);
1343 fprintf(stderr, "rfxswf error: sprite doesn't end(1)\n");
1345 swf_SetU16(sprtag, id);
1346 swf_SetU16(sprtag, frames);
1348 t = swf_NextTag(sprtag);
1354 (t->id!=ST_DEFINEBITSLOSSLESS&&t->id!=ST_DEFINEBITSLOSSLESS2&&t->id!=ST_SOUNDSTREAMBLOCK&&
1355 t->id!=ST_DEFINEBITSJPEG&&t->id!=ST_DEFINEBITSJPEG2&&t->id!=ST_DEFINEBITSJPEG3)
1357 swf_SetU16(sprtag,t->len|(t->id<<6));
1359 swf_SetU16(sprtag,0x3f|(t->id<<6));
1360 swf_SetU32(sprtag,t->len);
1363 swf_SetBlock(sprtag,t->data, t->len);
1365 if(t->id == ST_DEFINESPRITE && t->len<=4)
1370 swf_DeleteTag(0, tmp);
1374 fprintf(stderr, "rfxswf error: sprite doesn't end(2)\n");
1376 // sprtag->next = t;
1377 // t->prev = sprtag;
1380 int swf_IsFolded(TAG * t)
1382 return (t->id == ST_DEFINESPRITE && t->len>4);
1385 void swf_FoldAll(SWF*swf)
1387 TAG*tag = swf->firstTag;
1388 //swf_DumpSWF(stdout, swf);
1390 if(tag->id == ST_DEFINESPRITE) {
1391 swf_FoldSprite(tag);
1392 //swf_DumpSWF(stdout, swf);
1394 tag = swf_NextTag(tag);
1398 void swf_UnFoldAll(SWF*swf)
1400 TAG*tag = swf->firstTag;
1402 if(tag->id == ST_DEFINESPRITE)
1403 swf_UnFoldSprite(tag);
1408 void swf_OptimizeTagOrder(SWF*swf)
1415 /* at the moment, we don't actually do optimizing,
1416 only fixing of non-spec-conformant things like
1423 tag = swf->firstTag;
1426 if(tag->id == ST_DEFINESPRITE) {
1428 /* ??? all sprites are supposed to be unfolded */
1429 fprintf(stderr, "librfxswf error - internal error in OptimizeTagOrder/UnfoldAll\n");
1439 /* move non-sprite tags out of sprite */
1440 if(!swf_isAllowedSpriteTag(tag) || level>=2) {
1441 /* remove tag from current position */
1442 tag->prev->next = tag->next;
1444 tag->next->prev = tag->prev;
1446 /* insert before tag level0 */
1448 tag->prev = level0->prev;
1451 tag->prev->next = tag;
1453 swf->firstTag = tag;
1457 if(tag->id == ST_END) {
1468 int swf_ReadSWF2(reader_t*reader, SWF * swf) // Reads SWF to memory (malloc'ed), returns length or <0 if fails
1470 if (!swf) return -1;
1471 memset(swf,0x00,sizeof(SWF));
1473 { char b[32]; // read Header
1479 if ((len = reader->read(reader ,b,8))<8) return -1;
1481 if (b[0]!='F' && b[0]!='C') return -1;
1482 if (b[1]!='W') return -1;
1483 if (b[2]!='S') return -1;
1484 swf->fileVersion = b[3];
1485 swf->compressed = (b[0]=='C')?1:0;
1486 swf->fileSize = GET32(&b[4]);
1488 if(swf->compressed) {
1489 reader_init_zlibinflate(&zreader, reader);
1492 swf->compressed = 0; // derive from version number from now on
1494 reader_GetRect(reader, &swf->movieSize);
1495 reader->read(reader, &swf->frameRate, 2);
1496 swf->frameRate = SWAP16(swf->frameRate);
1497 reader->read(reader, &swf->frameCount, 2);
1498 swf->frameCount = SWAP16(swf->frameCount);
1500 /* read tags and connect to list */
1504 t = swf_ReadTag(reader,t);
1505 if(t && t->id == ST_FILEATTRIBUTES) {
1506 swf->fileAttributes = swf_GetU32(t);
1507 swf_ResetReadBits(t);
1510 swf->firstTag = t1.next;
1512 t1.next->prev = NULL;
1518 SWF* swf_OpenSWF(char*filename)
1520 int fi = open(filename, O_RDONLY|O_BINARY);
1522 fprintf(stderr, "Failed to open %s\n", filename);
1525 SWF* swf = rfx_alloc(sizeof(SWF));
1526 swf_ReadSWF(fi, swf);
1531 int swf_ReadSWF(int handle, SWF * swf)
1534 reader_init_filereader(&reader, handle);
1535 return swf_ReadSWF2(&reader, swf);
1538 void swf_ReadABCfile(char*filename, SWF*swf)
1540 memset(swf, 0, sizeof(SWF));
1542 swf->fileAttributes=FILEATTRIBUTE_AS3; //as3
1543 TAG*tag = swf->firstTag = swf_InsertTag(0, ST_RAWABC);
1544 memfile_t*file = memfile_open(filename);
1545 swf_SetBlock(tag, file->data, file->len);
1546 memfile_close(file);
1549 int no_extra_tags = 0;
1551 int WriteExtraTags(SWF*swf, writer_t*writer)
1553 TAG*t = swf->firstTag;
1554 TAG* has_fileattributes=0;
1555 int has_scenedescription=0;
1556 int has_version_8_action=0;
1557 int has_version_9_action=0;
1560 if(t->id == ST_FILEATTRIBUTES)
1561 has_fileattributes = t;
1562 if(t->id == ST_SCENEDESCRIPTION)
1563 has_scenedescription = 1;
1564 if(t->id == ST_DOABC)
1565 has_version_9_action=1;
1566 /* FIXME: this doesn't yet find actionscript in buttons */
1567 if(t->id == ST_DOACTION || t->id == ST_DOINITACTION)
1568 has_version_8_action=1;
1569 if(t->id == ST_PLACEOBJECT2 && t->len && (t->data[0]&0x80))
1570 has_version_8_action=1;
1573 if(has_version_8_action && has_version_9_action) {
1574 fprintf(stderr, "Warning: File contains both flash 8 and flash 9 actionscript\n");
1577 if(swf->fileVersion >= 9) {
1578 if(!has_fileattributes) {
1579 U32 flags = swf->fileAttributes|FILEATTRIBUTE_AS3; // 16 = has symbolclass tag | 8 = actionscript3 | 1 = usenetwork
1580 if(has_version_8_action && !has_version_9_action)
1581 flags &= ~FILEATTRIBUTE_AS3;
1582 TAG*fileattrib = swf_InsertTag(0, ST_FILEATTRIBUTES);
1583 swf_SetU32(fileattrib, flags);
1585 if(swf_WriteTag2(writer, fileattrib)<0)
1588 len += swf_WriteTag(-1,fileattrib);
1590 swf_DeleteTag(0, fileattrib);
1592 if(swf->fileAttributes) {
1593 /* if we're writing a file out again where we might have possible
1594 modified the fileattributes in the header, adjust the tag data */
1595 TAG*tt = swf_CopyTag(0,has_fileattributes);
1596 U32 flags = swf_GetU32(tt) | swf->fileAttributes;
1597 swf_ResetTag(tt, tt->id);
1598 swf_SetU32(tt, flags);
1599 if(swf_WriteTag2(writer, has_fileattributes)<0) return -1;
1600 swf_DeleteTag(0, tt);
1602 if(swf_WriteTag2(writer, has_fileattributes)<0)
1606 if(0 && !has_scenedescription) {
1607 TAG*scene = swf_InsertTag(0, ST_SCENEDESCRIPTION);
1608 swf_SetU16(scene, 1);
1609 swf_SetString(scene, "Scene 1");
1610 swf_SetU8(scene, 0);
1612 if(swf_WriteTag2(writer, scene)<0)
1615 len += swf_WriteTag(-1,scene);
1617 swf_DeleteTag(0, scene);
1623 int swf_WriteSWF2(writer_t*writer, SWF * swf) // Writes SWF to file, returns length or <0 if fails
1631 writer_t*original_writer = writer;
1632 int writer_lastpos = 0;
1634 if (!swf) return -1;
1635 if (!writer) return -1; // the caller should provide a nullwriter, not 0, for querying SWF size
1637 if(original_writer) writer_lastpos = original_writer->pos;
1639 // Count Frames + File Size
1645 if(swf->firstTag && !no_extra_tags) {
1646 len += WriteExtraTags(swf, 0);
1649 len += swf_WriteTag(-1,t);
1650 if(t->id == ST_DEFINESPRITE && !swf_IsFolded(t)) inSprite++;
1651 else if(t->id == ST_END && inSprite) inSprite--;
1652 else if(t->id == ST_END && !inSprite) {
1653 if(t->prev && t->prev->id!=ST_SHOWFRAME)
1656 else if(t->id == ST_SHOWFRAME && !inSprite) frameCount++;
1664 memset(&t1,0x00,sizeof(TAG));
1668 { // measure header file size
1671 memset(&t2,0x00,sizeof(TAG));
1674 swf_SetRect(&t2, &swf->movieSize);
1675 swf_SetU16(&t2, swf->frameRate);
1676 swf_SetU16(&t2, swf->frameCount);
1677 l = swf_GetTagLen(&t2)+8;
1679 if(swf->compressed == 8) {
1684 if(len) {// don't touch headers without tags
1685 swf->fileSize = fileSize;
1686 swf->frameCount = frameCount;
1689 if(swf->compressed != 8) {
1690 /* compressed flag set to 8 means "skip first 8
1691 header bytes". This is necessary if the caller wants to
1692 create compressed SWFs himself .
1693 It also means that we don't initialize our own zlib
1694 writer, but assume the caller provided one.
1696 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6)) {
1698 writer->write(writer, id, 3);
1701 writer->write(writer, id, 3);
1704 writer->write(writer, &swf->fileVersion, 1);
1705 PUT32(b4, swf->fileSize);
1706 writer->write(writer, b4, 4);
1708 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6)) {
1709 writer_init_zlibdeflate(&zwriter, writer);
1714 swf_SetRect(&t1,&swf->movieSize);
1715 swf_SetU16(&t1,swf->frameRate);
1716 swf_SetU16(&t1,swf->frameCount);
1718 ret = writer->write(writer,b,swf_GetTagLen(&t1));
1719 if (ret!=swf_GetTagLen(&t1))
1722 fprintf(stderr, "ret:%d\n",ret);
1724 fprintf(stderr,"WriteSWF() failed: Header.\n");
1729 if(swf->firstTag && !no_extra_tags) {
1730 WriteExtraTags(swf, writer);
1735 if(no_extra_tags || t->id != ST_FILEATTRIBUTES) {
1736 if(swf_WriteTag2(writer, t)<0)
1741 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6) || swf->compressed==8) {
1742 if(swf->compressed != 8) {
1743 zwriter.finish(&zwriter);
1744 return original_writer->pos - writer_lastpos;
1746 return (int)fileSize;
1748 return (int)fileSize;
1753 int swf_SaveSWF(SWF * swf, char*filename)
1755 int fi = open(filename, O_BINARY|O_RDWR|O_TRUNC|O_CREAT, 0777);
1760 if(swf_WriteSWF(fi, swf)<0) {
1761 fprintf(stderr, "Unable to write output file: %s\n", filename);
1768 int swf_WriteSWF(int handle, SWF * swf) // Writes SWF to file, returns length or <0 if fails
1774 writer_init_nullwriter(&writer);
1775 len = swf_WriteSWF2(&writer, swf);
1778 writer_init_filewriter(&writer, handle);
1779 len = swf_WriteSWF2(&writer, swf);
1780 writer.finish(&writer);
1784 int swf_WriteHeader2(writer_t*writer,SWF * swf)
1787 memcpy(&myswf,swf,sizeof(SWF));
1789 return swf_WriteSWF2(writer, &myswf);
1792 int swf_WriteHeader(int handle,SWF * swf)
1795 memcpy(&myswf,swf,sizeof(SWF));
1797 return swf_WriteSWF(handle, &myswf);
1800 int swf_WriteCGI(SWF * swf)
1804 len = swf_WriteSWF(-1,swf);
1806 if (len<0) return -1;
1808 sprintf(s,"Content-type: application/x-shockwave-flash\n"
1809 "Accept-Ranges: bytes\n"
1810 "Content-Length: %lu\n"
1811 "Expires: Thu, 13 Apr 2000 23:59:59 GMT\n"
1814 write(fileno(stdout),s,strlen(s));
1815 return swf_WriteSWF(fileno(stdout),swf);
1818 SWF* swf_CopySWF(SWF*swf)
1820 SWF*nswf = (SWF*)rfx_alloc(sizeof(SWF));
1822 memcpy(nswf, swf, sizeof(SWF));
1824 tag = swf->firstTag;
1827 ntag = swf_CopyTag(ntag, tag);
1829 nswf->firstTag = ntag;
1835 void swf_FreeTags(SWF * swf) // Frees all malloc'ed memory for tags
1836 { TAG * t = swf->firstTag;
1839 { TAG * tnew = t->next;
1840 if (t->data) rfx_free(t->data);
1847 // include advanced functions
1849 //#include "modules/swfdump.c"
1850 //#include "modules/swfshape.c"
1851 //#include "modules/swftext.c"
1852 //#include "modules/swffont.c"
1853 //#include "modules/swfobject.c"
1854 //#include "modules/swfbutton.c"
1855 //#include "modules/swftools.c"
1856 //#include "modules/swfcgi.c"
1857 //#include "modules/swfbits.c"
1858 //#include "modules/swfaction.c"
1859 //#include "modules/swfabc.c"
1860 //#include "modules/swfsound.c"
1861 //#include "modules/swfdraw.c"
1862 //#include "modules/swfrender.c"
1863 //#include "modules/swffilter.c"