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) {
181 fprintf(stderr, "Warning: S16 overflow: %d\n", v);
184 swf_SetU16(t, (S16)v);
187 int swf_SetU32(TAG * t,U32 v)
189 a[0] = v&0xff; // to ensure correct handling of non-intel byteorder
194 swf_ResetWriteBits(t);
195 if ((t->len+4)>t->memsize) return (swf_SetBlock(t,a,4)==4)?0:-1;
196 t->data[t->len++] = a[0];
197 t->data[t->len++] = a[1];
198 t->data[t->len++] = a[2];
199 t->data[t->len++] = a[3];
203 U32 swf_GetBits(TAG * t,int nbits)
205 if (!nbits) return 0;
206 if (!t->readBit) t->readBit = 0x80;
211 { fprintf(stderr,"GetBits() out of bounds: TagID = %i, pos=%d, len=%d\n",t->id, t->pos, t->len);
212 int i,m=t->len>10?10:t->len;
214 fprintf(stderr, "(%d)%02x ", i, t->data[i]);
216 fprintf(stderr, "\n");
220 if (t->data[t->pos]&t->readBit) res|=1;
224 { if (nbits) t->readBit = 0x80;
231 S32 swf_GetSBits(TAG * t,int nbits)
232 { U32 res = swf_GetBits(t,nbits);
233 if (res&(1<<(nbits-1))) res|=(0xffffffff<<nbits);
237 U32 reader_GetBits(reader_t*reader, int nbits)
238 { return reader_readbits(reader, nbits);
240 S32 reader_GetSBits(reader_t*reader, int nbits)
241 { U32 res = reader_readbits(reader, nbits);
242 if (res&(1<<(nbits-1))) res|=(0xffffffff<<nbits);
246 int swf_SetBits(TAG * t,U32 v,int nbits)
247 { U32 bm = 1<<(nbits-1);
251 { if (FAILED(swf_SetU8(t,0))) return -1;
254 if (v&bm) t->data[t->len-1] |= t->writeBit;
262 // Advanced Data Access Functions
264 double swf_GetFixed(TAG * t)
266 U16 low = swf_GetU16(t);
267 U16 high = swf_GetU16(t);
268 return high + low*(1/65536.0);
270 void swf_SetFixed(TAG * t, double f)
272 U16 fr = (U16)((f-(int)f)*65536);
274 swf_SetU16(t, (U16)f - (f<0 && fr!=0));
276 float swf_GetFixed8(TAG * t)
278 U8 low = swf_GetU8(t);
279 U8 high = swf_GetU8(t);
280 return (float)(high + low*(1/256.0));
282 void swf_SetFixed8(TAG * t, float f)
284 U8 fr = (U8)((f-(int)f)*256);
286 swf_SetU8(t, (U8)f - (f<0 && fr!=0));
289 U32 swf_GetU30(TAG*tag)
295 U8 b = swf_GetU8(tag);
299 if(!(b&128) || shift>=32)
302 /*int nr2= swf_SetU30(0, s);
304 printf("Unsigned value %d stored in %d bytes, I'd store it in %d bytes\n", s, nr, nr2);
309 int swf_SetU30(TAG*tag, U32 u)
314 swf_SetU8(tag, (u&~0x7f?0x80:0) | (u&0x7F));
321 void swf_SetABCU32(TAG*tag, U32 u)
324 swf_SetU8(tag, (u&~0x7f?0x80:0) | (u&0x7F));
328 U32 swf_GetABCU32(TAG*tag)
330 return swf_GetU30(tag);
332 void swf_SetABCS32(TAG*tag, S32 v)
334 swf_SetABCU32(tag, v);
336 S32 swf_GetABCS32(TAG*tag)
338 return swf_GetABCU32(tag);
343 /*The AVM2 spec is just plain wrong, claiming that S32 values are sign
344 extended. They're not.
345 This wastes up to 4 bytes for every negative value. */
347 void swf_SetABCS32(TAG*tag, S32 s)
349 printf("write S32: %d\n", s);
351 U8 sign = s<0?0x40:0;
357 if(s==neg && vsign==sign) {
358 /* if the value we now write has the same sign as s
359 and all the remaining bits are equal to the sign of s
362 printf("put %02x\n", val);
365 swf_SetU8(tag, 0x80 | val);
366 printf("put %02x\n", 0x80|val);
370 int swf_GetS30(TAG*tag)
376 U8 b = swf_GetU8(tag);
378 nt i,m=t->len>10?10:t->len;
380 fprintf(stderr, "%02x ", t->data[i]);
382 fprintf(stderr, "\n");
385 if(!(b&128) || shift>=32) {
388 s|=0xffffffff<<shift;
393 /* It's not uncommon for other applications (Flex for all negative numbers, and
394 Flash for -1) to generate a lot more bytes than would be necessary.
395 int nr2= swf_SetS30(0, s);
397 printf("Signed value %d stored in %d bytes, I'd store it in %d bytes\n", s, nr, nr2);
403 int swf_SetU30String(TAG*tag, const char*str, int l)
406 len+=swf_SetU30(tag, l);
408 swf_SetBlock(tag, (void*)str, l);
411 float swf_GetF16(TAG * t)
415 U16 f1 = swf_GetU16(t);
417 U32 f2 = (f1&0x8000)<<16; //sign
418 f2 |= ((f1&0x7c00)<<13)+(0x40000000-(0x4000<<13)); //exp
419 f2 |= (f1&0x03ff)<<13; //mantissa
422 void swf_SetF16(TAG * t, float f)
425 U16 f2 = (f1>>16)&0x8000;
426 int exp = ((f1>>23)&0xff)-0x80+0x10;
429 fprintf(stderr, "Exponent underflow in FLOAT16 encoding\n");
432 fprintf(stderr, "Exponent overflow in FLOAT16 encoding\n");
435 f2 |= (f1>>13)&0x3ff;
439 double swf_GetD64(TAG*tag)
441 /* FIXME: this is not big-endian compatible */
442 double value = *(double*)&tag->data[tag->pos];
447 int swf_SetD64(TAG*tag, double v)
449 /* FIXME: this is not big-endian compatible */
450 swf_SetU32(tag, ((U32*)&v)[0]);
451 swf_SetU32(tag, ((U32*)&v)[1]);
454 int swf_GetU24(TAG*tag)
456 int b1 = swf_GetU8(tag);
457 int b2 = swf_GetU8(tag);
458 int b3 = swf_GetU8(tag);
459 return b3<<16|b2<<8|b1;
461 int swf_GetS24(TAG*tag)
463 int b1 = swf_GetU8(tag);
464 int b2 = swf_GetU8(tag);
465 int b3 = swf_GetU8(tag);
467 return -1-((b3<<16|b2<<8|b1)^0xffffff);
469 return b3<<16|b2<<8|b1;
472 int swf_SetU24(TAG*tag, U32 v)
476 fprintf(stderr, "Error: Overflow in swf_SetU24()\n");
478 swf_SetU8(tag, v>>8);
479 swf_SetU8(tag, v>>16);
483 int swf_SetS24(TAG*tag, U32 v)
487 return swf_SetU24(tag, v);
488 if((v&0xff000000)!=0xff000000) {
489 fprintf(stderr, "Error: Overflow in swf_SetS24()\n");
492 swf_SetU8(tag, v>>8);
493 swf_SetU8(tag, v>>16);
499 int swf_SetRGB(TAG * t,RGBA * col)
502 { swf_SetU8(t,col->r);
505 } else swf_SetBlock(t,NULL,3);
508 void swf_GetRGB(TAG * t, RGBA * col)
513 col->r = swf_GetU8(t);
514 col->g = swf_GetU8(t);
515 col->b = swf_GetU8(t);
519 int swf_SetRGBA(TAG * t,RGBA * col)
522 { swf_SetU8(t,col->r);
526 } else swf_SetBlock(t,NULL,4);
529 void swf_GetRGBA(TAG * t, RGBA * col)
534 col->r = swf_GetU8(t);
535 col->g = swf_GetU8(t);
536 col->b = swf_GetU8(t);
537 col->a = swf_GetU8(t);
540 void swf_GetGradient(TAG * tag, GRADIENT * gradient, char alpha)
544 memset(gradient, 0, sizeof(GRADIENT));
547 U8 num = swf_GetU8(tag) & 15;
550 gradient->rgba = (RGBA*)rfx_calloc(sizeof(RGBA)*gradient->num);
551 gradient->ratios = (U8*)rfx_calloc(sizeof(gradient->ratios[0])*gradient->num);
555 U8 ratio = swf_GetU8(tag);
558 swf_GetRGB(tag, &color);
560 swf_GetRGBA(tag, &color);
562 gradient->ratios[t] = ratio;
563 gradient->rgba[t] = color;
568 void swf_SetGradient(TAG * tag, GRADIENT * gradient, char alpha)
572 memset(gradient, 0, sizeof(GRADIENT));
575 swf_SetU8(tag, gradient->num);
576 for(t=0; t<8 && t<gradient->num; t++)
578 swf_SetU8(tag, gradient->ratios[t]);
580 swf_SetRGB(tag, &gradient->rgba[t]);
582 swf_SetRGBA(tag, &gradient->rgba[t]);
586 void swf_FreeGradient(GRADIENT* gradient)
589 rfx_free(gradient->ratios);
591 rfx_free(gradient->rgba);
592 memset(gradient, 0, sizeof(GRADIENT));
595 int swf_CountUBits(U32 v,int nbits)
598 if(v == 0x00000000) n = 0;
604 return (n>nbits)?n:nbits;
607 int swf_CountBits(U32 v,int nbits)
611 { if(v == 0xffffffff) n = 1;
619 { if(v == 0x00000000) n = 0;
626 return (n>nbits)?n:nbits;
629 int swf_GetRect(TAG * t,SRECT * r)
632 if(!t) {r->xmin=r->xmax=r->ymin=r->ymax=0;return 0;}
634 nbits = (int) swf_GetBits(t,5);
635 r->xmin = swf_GetSBits(t,nbits);
636 r->xmax = swf_GetSBits(t,nbits);
637 r->ymin = swf_GetSBits(t,nbits);
638 r->ymax = swf_GetSBits(t,nbits);
642 int reader_GetRect(reader_t*reader,SRECT * r)
646 nbits = (int) reader_GetBits(reader,5);
647 r->xmin = reader_GetSBits(reader,nbits);
648 r->xmax = reader_GetSBits(reader,nbits);
649 r->ymin = reader_GetSBits(reader,nbits);
650 r->ymax = reader_GetSBits(reader,nbits);
654 int swf_SetRect(TAG * t,SRECT * r)
657 nbits = swf_CountBits(r->xmin,0);
658 nbits = swf_CountBits(r->xmax,nbits);
659 nbits = swf_CountBits(r->ymin,nbits);
660 nbits = swf_CountBits(r->ymax,nbits);
663 fprintf(stderr, "rfxswf: Warning: num_bits overflow in swf_SetRect\n");
668 swf_SetBits(t,nbits,5);
669 swf_SetBits(t,r->xmin,nbits);
670 swf_SetBits(t,r->xmax,nbits);
671 swf_SetBits(t,r->ymin,nbits);
672 swf_SetBits(t,r->ymax,nbits);
677 SRECT swf_ClipRect(SRECT border, SRECT r)
679 if(r.xmax > border.xmax) r.xmax = border.xmax;
680 if(r.ymax > border.ymax) r.ymax = border.ymax;
681 if(r.xmax < border.xmin) r.xmax = border.xmin;
682 if(r.ymax < border.ymin) r.ymax = border.ymin;
684 if(r.xmin > border.xmax) r.xmin = border.xmax;
685 if(r.ymin > border.ymax) r.ymin = border.ymax;
686 if(r.xmin < border.xmin) r.xmin = border.xmin;
687 if(r.ymin < border.ymin) r.ymin = border.ymin;
691 void swf_ExpandRect(SRECT*src, SPOINT add)
693 if((src->xmin | src->ymin | src->xmax | src->ymax)==0) {
698 if((add.x|add.y) == 0) src->xmax++; //make sure the bbox is not NULL anymore
701 if(add.x < src->xmin)
703 if(add.x > src->xmax)
705 if(add.y < src->ymin)
707 if(add.y > src->ymax)
710 void swf_ExpandRect2(SRECT*src, SRECT*add)
712 if((add->xmin | add->ymin | add->xmax | add->ymax)==0)
714 if((src->xmin | src->ymin | src->xmax | src->ymax)==0)
716 if(add->xmin < src->xmin)
717 src->xmin = add->xmin;
718 if(add->ymin < src->ymin)
719 src->ymin = add->ymin;
720 if(add->xmax > src->xmax)
721 src->xmax = add->xmax;
722 if(add->ymax > src->ymax)
723 src->ymax = add->ymax;
725 void swf_ExpandRect3(SRECT*src, SPOINT center, int radius)
727 if((src->xmin | src->ymin | src->xmax | src->ymax)==0) {
728 src->xmin = center.x-radius;
729 src->ymin = center.y-radius;
730 src->xmax = center.x+radius;
731 src->ymax = center.y+radius;
732 if((center.x|center.y|radius) == 0) src->xmax++; //make sure the bbox is not NULL anymore
735 if(center.x - radius < src->xmin)
736 src->xmin = center.x - radius;
737 if(center.x + radius > src->xmax)
738 src->xmax = center.x + radius;
739 if(center.y - radius < src->ymin)
740 src->ymin = center.y - radius;
741 if(center.y + radius > src->ymax)
742 src->ymax = center.y + radius;
744 SPOINT swf_TurnPoint(SPOINT p, MATRIX* m)
747 r.x = (int)(m->sx*(1/65536.0)*p.x + m->r1*(1/65536.0)*p.y + 0.5) + m->tx;
748 r.y = (int)(m->r0*(1/65536.0)*p.x + m->sy*(1/65536.0)*p.y + 0.5) + m->ty;
751 SRECT swf_TurnRect(SRECT r, MATRIX* m)
754 SPOINT p1,p2,p3,p4,pp1,pp2,pp3,pp4;
757 p1.x = r.xmin;p1.y = r.ymin;
758 p2.x = r.xmax;p2.y = r.ymin;
759 p3.x = r.xmin;p3.y = r.ymax;
760 p4.x = r.xmax;p4.y = r.ymax;
761 pp1 = swf_TurnPoint(p1, m);
762 pp2 = swf_TurnPoint(p2, m);
763 pp3 = swf_TurnPoint(p3, m);
764 pp4 = swf_TurnPoint(p4, m);
765 g.xmin = g.xmax = pp1.x;
766 g.ymin = g.ymax = pp1.y;
767 swf_ExpandRect(&g, pp2);
768 swf_ExpandRect(&g, pp3);
769 swf_ExpandRect(&g, pp4);
774 int swf_GetMatrix(TAG * t,MATRIX * m)
781 { m->sx = m->sy = 0x10000;
787 swf_ResetReadBits(t);
789 if (swf_GetBits(t,1))
790 { nbits = swf_GetBits(t,5);
791 m->sx = swf_GetSBits(t,nbits);
792 m->sy = swf_GetSBits(t,nbits);
794 else m->sx = m->sy = 0x10000;
796 if (swf_GetBits(t,1))
797 { nbits = swf_GetBits(t,5);
798 m->r0 = swf_GetSBits(t,nbits);
799 m->r1 = swf_GetSBits(t,nbits);
801 else m->r0 = m->r1 = 0x0;
803 nbits = swf_GetBits(t,5);
804 m->tx = swf_GetSBits(t,nbits);
805 m->ty = swf_GetSBits(t,nbits);
810 int swf_SetMatrix(TAG * t,MATRIX * m)
816 ma.sx = ma.sy = 0x10000;
821 swf_ResetWriteBits(t);
823 if ((m->sx==0x10000)&&(m->sy==0x10000)) swf_SetBits(t,0,1);
825 { swf_SetBits(t,1,1);
826 nbits = swf_CountBits(m->sx,0);
827 nbits = swf_CountBits(m->sy,nbits);
829 /* TODO: happens on AMD64 systems for normal values? */
831 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
835 swf_SetBits(t,nbits,5);
836 swf_SetBits(t,m->sx,nbits);
837 swf_SetBits(t,m->sy,nbits);
840 if ((!m->r0)&&(!m->r1)) swf_SetBits(t,0,1);
842 { swf_SetBits(t,1,1);
843 nbits = swf_CountBits(m->r0,0);
844 nbits = swf_CountBits(m->r1,nbits);
847 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
851 swf_SetBits(t,nbits,5);
852 swf_SetBits(t,m->r0,nbits);
853 swf_SetBits(t,m->r1,nbits);
856 nbits = swf_CountBits(m->tx,0);
857 nbits = swf_CountBits(m->ty,nbits);
860 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
864 swf_SetBits(t,nbits,5);
865 swf_SetBits(t,m->tx,nbits);
866 swf_SetBits(t,m->ty,nbits);
871 int swf_GetCXForm(TAG * t,CXFORM * cx,U8 alpha)
879 cx->a0 = cx->r0 = cx->g0 = cx->b0 = 256;
880 cx->a1 = cx->r1 = cx->g1 = cx->b1 = 0;
884 swf_ResetReadBits(t);
885 hasadd = swf_GetBits(t,1);
886 hasmul = swf_GetBits(t,1);
887 nbits = swf_GetBits(t,4);
890 { cx->r0 = (S16)swf_GetSBits(t,nbits);
891 cx->g0 = (S16)swf_GetSBits(t,nbits);
892 cx->b0 = (S16)swf_GetSBits(t,nbits);
894 cx->a0 = (S16)swf_GetSBits(t,nbits);
898 { cx->r1 = (S16)swf_GetSBits(t,nbits);
899 cx->g1 = (S16)swf_GetSBits(t,nbits);
900 cx->b1 = (S16)swf_GetSBits(t,nbits);
902 cx->a1 = (S16)swf_GetSBits(t,nbits);
908 int swf_SetCXForm(TAG * t,CXFORM * cx,U8 alpha)
916 cx->a0 = cx->r0 = cx->g0 = cx->b0 = 256;
917 cx->a1 = cx->r1 = cx->g1 = cx->b1 = 0;
927 hasmul = (cx->a0!=256)||(cx->r0!=256)||(cx->g0!=256)||(cx->b0!=256);
928 hasadd = cx->a1|cx->r1|cx->g1|cx->b1;
931 { if (alpha) nbits = swf_CountBits((S32)cx->a0,nbits);
932 nbits = swf_CountBits((S32)cx->r0,nbits);
933 nbits = swf_CountBits((S32)cx->g0,nbits);
934 nbits = swf_CountBits((S32)cx->b0,nbits);
938 { if (alpha) nbits = swf_CountBits((S32)cx->a1,nbits);
939 nbits = swf_CountBits((S32)cx->r1,nbits);
940 nbits = swf_CountBits((S32)cx->g1,nbits);
941 nbits = swf_CountBits((S32)cx->b1,nbits);
944 swf_ResetWriteBits(t);
945 swf_SetBits(t,hasadd?1:0,1);
946 swf_SetBits(t,hasmul?1:0,1);
947 swf_SetBits(t,nbits,4);
950 { swf_SetBits(t,cx->r0,nbits);
951 swf_SetBits(t,cx->g0,nbits);
952 swf_SetBits(t,cx->b0,nbits);
953 if (alpha) swf_SetBits(t,cx->a0,nbits);
957 { swf_SetBits(t,cx->r1,nbits);
958 swf_SetBits(t,cx->g1,nbits);
959 swf_SetBits(t,cx->b1,nbits);
960 if (alpha) swf_SetBits(t,cx->a1,nbits);
966 //int swf_GetPoint(TAG * t,SPOINT * p) { return 0; }
967 //int swf_SetPoint(TAG * t,SPOINT * p) { return 0; }
969 void swf_SetPassword(TAG * t, const char * password)
971 /* WARNING: crypt_md5 is not reentrant */
975 #if defined(HAVE_LRAND48) && defined(HAVE_SRAND48) && defined(HAVE_TIME_H) && defined(HAVE_TIME)
977 salt[0] = "abcdefghijklmnopqrstuvwxyz0123456789"[lrand48()%36];
978 salt[1] = "abcdefghijklmnopqrstuvwxyz0123456789"[lrand48()%36];
982 fprintf(stderr, "rfxswf: Warning- no usable random generator found\n");
983 fprintf(stderr, "Your password will be vulnerable to dictionary attacks\n");
987 md5string = crypt_md5(password, salt);
990 swf_SetString(t, md5string);
993 void swf_SetString(TAG*t, const char* s)
998 swf_SetBlock(t,(U8*)s,strlen(s)+1);
1002 int swf_VerifyPassword(TAG * t, const char * password)
1004 char*md5string1, *md5string2;
1009 if(t->len >= 5 && t->pos==0 &&
1014 printf("%d %d %d %d\n", t->len, t->pos, t->data[0], t->data[1]);
1017 md5string1 = swf_GetString(t);
1019 if(strncmp(md5string1, "$1$",3 )) {
1020 fprintf(stderr, "rfxswf: no salt in pw string\n");
1023 x = strchr(md5string1+3, '$');
1025 fprintf(stderr, "rfxswf: invalid salt format in pw string\n");
1028 n = x-(md5string1+3);
1029 salt = (char*)rfx_alloc(n+1);
1030 memcpy(salt, md5string1+3, n);
1033 md5string2 = crypt_md5(password, salt);
1035 if(strcmp(md5string1, md5string2) != 0)
1040 // Tag List Manipulating Functions
1042 TAG * swf_InsertTag(TAG * after,U16 id)
1045 t = (TAG *)rfx_calloc(sizeof(TAG));
1051 t->next = after->next;
1053 if (t->next) t->next->prev = t;
1058 TAG * swf_InsertTagBefore(SWF* swf, TAG * before,U16 id)
1061 t = (TAG *)rfx_calloc(sizeof(TAG));
1067 t->prev = before->prev;
1069 if (t->prev) t->prev->next = t;
1071 if(swf && swf->firstTag == before) {
1077 void swf_ClearTag(TAG * t)
1079 if (t->data) rfx_free(t->data);
1088 void swf_ResetTag(TAG*tag, U16 id)
1090 tag->len = tag->pos = tag->readBit = tag->writeBit = 0;
1094 TAG* swf_CopyTag(TAG*tag, TAG*to_copy)
1096 tag = swf_InsertTag(tag, to_copy->id);
1097 swf_SetBlock(tag, to_copy->data, to_copy->len);
1101 TAG* swf_DeleteTag(SWF*swf, TAG * t)
1105 if (swf && swf->firstTag==t)
1106 swf->firstTag = t->next;
1107 if (t->prev) t->prev->next = t->next;
1108 if (t->next) t->next->prev = t->prev;
1110 if (t->data) rfx_free(t->data);
1115 TAG * swf_ReadTag(reader_t*reader, TAG * prev)
1121 if (reader->read(reader, &raw, 2) !=2 ) return NULL;
1129 if (reader->read(reader, &len, 4) != 4) return NULL;
1133 if (id==ST_DEFINESPRITE) len = 2*sizeof(U16);
1134 // Sprite handling fix: Flatten sprite tree
1136 t = (TAG *)rfx_calloc(sizeof(TAG));
1142 { t->data = (U8*)rfx_alloc(t->len);
1143 t->memsize = t->len;
1144 if (reader->read(reader, t->data, t->len) != t->len) {
1146 fprintf(stderr, "rfxswf: Warning: Short read (tagid %d). File truncated?\n", t->id);
1148 free(t->data);t->data=0;
1163 int swf_DefineSprite_GetRealSize(TAG * t);
1165 int swf_WriteTag2(writer_t*writer, TAG * t)
1166 // returns tag length in bytes (incl. Header), -1 = Error
1167 // writer = 0 -> no output
1174 len = (t->id==ST_DEFINESPRITE)?swf_DefineSprite_GetRealSize(t):t->len;
1176 short_tag = len<0x3f&&
1177 (t->id!=ST_DEFINEBITSLOSSLESS&&t->id!=ST_DEFINEBITSLOSSLESS2&&t->id!=ST_SOUNDSTREAMBLOCK&&
1178 t->id!=ST_DEFINEBITSJPEG&&t->id!=ST_DEFINEBITSJPEG2&&t->id!=ST_DEFINEBITSJPEG3);
1183 int oldpos = writer->pos;
1187 { raw[0] = SWAP16(len|((t->id&0x3ff)<<6));
1188 if (writer->write(writer,raw,2)!=2)
1191 fprintf(stderr,"WriteTag() failed: Short Header.\n");
1198 raw[0] = SWAP16((t->id<<6)|0x3f);
1199 if (writer->write(writer,raw,2)!=2)
1202 fprintf(stderr,"WriteTag() failed: Long Header (1).\n");
1208 if (writer->write(writer,&len,4)!=4)
1211 fprintf(stderr,"WriteTag() failed: Long Header (2).\n");
1218 { if (writer->write(writer,t->data,t->len)!=t->len)
1221 fprintf(stderr,"WriteTag() failed: Data.\n");
1227 else if (t->len) fprintf(stderr,"WriteTag(): Tag Data Error, id=%i\n",t->id);
1231 writer->flush(writer);
1232 printf("TAG %s costs %d bytes\n", swf_TagGetName(t), writer->pos-oldpos);
1236 return t->len+(short_tag?2:6);
1239 int swf_WriteTag(int handle, TAG * t)
1244 return swf_WriteTag2(0, t);
1245 writer_init_filewriter(&writer, handle);
1246 len = swf_WriteTag2(&writer, t);
1247 writer.finish(&writer);
1251 int swf_DefineSprite_GetRealSize(TAG * t)
1252 // Sprite Handling: Helper function to pack DefineSprite-Tag
1254 if(len>4) { // folded sprite
1258 { t = swf_NextTag(t);
1259 if (t && t->id!=ST_DEFINESPRITE) len += swf_WriteTag(-1, t);
1261 } while (t&&(t->id!=ST_END));
1265 void swf_UnFoldSprite(TAG * t)
1270 U16 spriteid,spriteframes;
1272 if(t->id!=ST_DEFINESPRITE)
1274 if(t->len<=4) // not folded
1279 spriteid = swf_GetU16(t); //id
1280 spriteframes = swf_GetU16(t); //frames
1287 tmp = swf_GetU16(t);
1292 if(id == ST_DEFINESPRITE && len<=4)
1296 len = swf_GetU32(t);
1297 it = swf_InsertTag(next, id);
1302 { it->data = (U8*)rfx_alloc(it->len);
1303 it->memsize = it->len;
1304 swf_GetBlock(t, it->data, it->len);
1311 rfx_free(t->data); t->data = 0;
1312 t->memsize = t->len = t->pos = 0;
1314 swf_SetU16(t, spriteid);
1315 swf_SetU16(t, spriteframes);
1318 void swf_FoldSprite(TAG * t)
1323 if(t->id!=ST_DEFINESPRITE)
1327 fprintf(stderr, "Error: Sprite has no ID!");
1332 /* sprite is already folded */
1339 t->len = t->pos = t->memsize = 0;
1344 t = swf_NextTag(sprtag);
1349 if(t->id==ST_SHOWFRAME) frames++;
1350 if(t->id == ST_DEFINESPRITE && t->len<=4)
1355 } while(t && level);
1357 fprintf(stderr, "rfxswf error: sprite doesn't end(1)\n");
1359 swf_SetU16(sprtag, id);
1360 swf_SetU16(sprtag, frames);
1362 t = swf_NextTag(sprtag);
1368 (t->id!=ST_DEFINEBITSLOSSLESS&&t->id!=ST_DEFINEBITSLOSSLESS2&&t->id!=ST_SOUNDSTREAMBLOCK&&
1369 t->id!=ST_DEFINEBITSJPEG&&t->id!=ST_DEFINEBITSJPEG2&&t->id!=ST_DEFINEBITSJPEG3)
1371 swf_SetU16(sprtag,t->len|(t->id<<6));
1373 swf_SetU16(sprtag,0x3f|(t->id<<6));
1374 swf_SetU32(sprtag,t->len);
1377 swf_SetBlock(sprtag,t->data, t->len);
1379 if(t->id == ST_DEFINESPRITE && t->len<=4)
1384 swf_DeleteTag(0, tmp);
1388 fprintf(stderr, "rfxswf error: sprite doesn't end(2)\n");
1390 // sprtag->next = t;
1391 // t->prev = sprtag;
1394 int swf_IsFolded(TAG * t)
1396 return (t->id == ST_DEFINESPRITE && t->len>4);
1399 void swf_FoldAll(SWF*swf)
1401 TAG*tag = swf->firstTag;
1402 //swf_DumpSWF(stdout, swf);
1404 if(tag->id == ST_DEFINESPRITE) {
1405 swf_FoldSprite(tag);
1406 //swf_DumpSWF(stdout, swf);
1408 tag = swf_NextTag(tag);
1412 void swf_UnFoldAll(SWF*swf)
1414 TAG*tag = swf->firstTag;
1416 if(tag->id == ST_DEFINESPRITE)
1417 swf_UnFoldSprite(tag);
1422 void swf_OptimizeTagOrder(SWF*swf)
1429 /* at the moment, we don't actually do optimizing,
1430 only fixing of non-spec-conformant things like
1437 tag = swf->firstTag;
1440 if(tag->id == ST_DEFINESPRITE) {
1442 /* ??? all sprites are supposed to be unfolded */
1443 fprintf(stderr, "librfxswf error - internal error in OptimizeTagOrder/UnfoldAll\n");
1453 /* move non-sprite tags out of sprite */
1454 if(!swf_isAllowedSpriteTag(tag) || level>=2) {
1455 /* remove tag from current position */
1456 tag->prev->next = tag->next;
1458 tag->next->prev = tag->prev;
1460 /* insert before tag level0 */
1462 tag->prev = level0->prev;
1465 tag->prev->next = tag;
1467 swf->firstTag = tag;
1471 if(tag->id == ST_END) {
1482 int swf_ReadSWF2(reader_t*reader, SWF * swf) // Reads SWF to memory (malloc'ed), returns length or <0 if fails
1484 if (!swf) return -1;
1485 memset(swf,0x00,sizeof(SWF));
1487 { char b[32]; // read Header
1493 if ((len = reader->read(reader ,b,8))<8) return -1;
1495 if (b[0]!='F' && b[0]!='C') return -1;
1496 if (b[1]!='W') return -1;
1497 if (b[2]!='S') return -1;
1498 swf->fileVersion = b[3];
1499 swf->compressed = (b[0]=='C')?1:0;
1500 swf->fileSize = GET32(&b[4]);
1502 if(swf->compressed) {
1503 reader_init_zlibinflate(&zreader, reader);
1506 swf->compressed = 0; // derive from version number from now on
1508 reader_GetRect(reader, &swf->movieSize);
1509 reader->read(reader, &swf->frameRate, 2);
1510 swf->frameRate = SWAP16(swf->frameRate);
1511 reader->read(reader, &swf->frameCount, 2);
1512 swf->frameCount = SWAP16(swf->frameCount);
1514 /* read tags and connect to list */
1518 t = swf_ReadTag(reader,t);
1519 if(t && t->id == ST_FILEATTRIBUTES) {
1520 swf->fileAttributes = swf_GetU32(t);
1521 swf_ResetReadBits(t);
1524 swf->firstTag = t1.next;
1526 t1.next->prev = NULL;
1532 SWF* swf_OpenSWF(char*filename)
1534 int fi = open(filename, O_RDONLY|O_BINARY);
1536 fprintf(stderr, "Failed to open %s\n", filename);
1539 SWF* swf = rfx_alloc(sizeof(SWF));
1540 swf_ReadSWF(fi, swf);
1545 int swf_ReadSWF(int handle, SWF * swf)
1548 reader_init_filereader(&reader, handle);
1549 return swf_ReadSWF2(&reader, swf);
1552 void swf_ReadABCfile(char*filename, SWF*swf)
1554 memset(swf, 0, sizeof(SWF));
1556 swf->fileAttributes=FILEATTRIBUTE_AS3; //as3
1557 TAG*tag = swf->firstTag = swf_InsertTag(0, ST_RAWABC);
1558 memfile_t*file = memfile_open(filename);
1559 swf_SetBlock(tag, file->data, file->len);
1560 memfile_close(file);
1563 int no_extra_tags = 0;
1565 int WriteExtraTags(SWF*swf, writer_t*writer)
1567 TAG*t = swf->firstTag;
1568 TAG* has_fileattributes=0;
1569 int has_scenedescription=0;
1570 int has_version_8_action=0;
1571 int has_version_9_action=0;
1574 if(t->id == ST_FILEATTRIBUTES)
1575 has_fileattributes = t;
1576 if(t->id == ST_SCENEDESCRIPTION)
1577 has_scenedescription = 1;
1578 if(t->id == ST_DOABC)
1579 has_version_9_action=1;
1580 /* FIXME: this doesn't yet find actionscript in buttons */
1581 if(t->id == ST_DOACTION || t->id == ST_DOINITACTION)
1582 has_version_8_action=1;
1583 if(t->id == ST_PLACEOBJECT2 && t->len && (t->data[0]&0x80))
1584 has_version_8_action=1;
1587 if(has_version_8_action && has_version_9_action) {
1588 fprintf(stderr, "Warning: File contains both flash 8 and flash 9 actionscript\n");
1591 if(swf->fileVersion >= 9) {
1592 if(!has_fileattributes) {
1593 U32 flags = swf->fileAttributes|FILEATTRIBUTE_AS3; // 16 = has symbolclass tag | 8 = actionscript3 | 1 = usenetwork
1594 if(has_version_8_action && !has_version_9_action)
1595 flags &= ~FILEATTRIBUTE_AS3;
1596 TAG*fileattrib = swf_InsertTag(0, ST_FILEATTRIBUTES);
1597 swf_SetU32(fileattrib, flags);
1599 if(swf_WriteTag2(writer, fileattrib)<0)
1602 len += swf_WriteTag(-1,fileattrib);
1604 swf_DeleteTag(0, fileattrib);
1606 if(swf->fileAttributes) {
1607 /* if we're writing a file out again where we might have possible
1608 modified the fileattributes in the header, adjust the tag data */
1609 TAG*tt = swf_CopyTag(0,has_fileattributes);
1610 U32 flags = swf_GetU32(tt) | swf->fileAttributes;
1611 swf_ResetTag(tt, tt->id);
1612 swf_SetU32(tt, flags);
1613 if(swf_WriteTag2(writer, has_fileattributes)<0) return -1;
1614 swf_DeleteTag(0, tt);
1616 if(swf_WriteTag2(writer, has_fileattributes)<0)
1620 if(0 && !has_scenedescription) {
1621 TAG*scene = swf_InsertTag(0, ST_SCENEDESCRIPTION);
1622 swf_SetU16(scene, 1);
1623 swf_SetString(scene, "Scene 1");
1624 swf_SetU8(scene, 0);
1626 if(swf_WriteTag2(writer, scene)<0)
1629 len += swf_WriteTag(-1,scene);
1631 swf_DeleteTag(0, scene);
1637 int swf_WriteSWF2(writer_t*writer, SWF * swf) // Writes SWF to file, returns length or <0 if fails
1645 writer_t*original_writer = writer;
1646 int writer_lastpos = 0;
1648 if (!swf) return -1;
1649 if (!writer) return -1; // the caller should provide a nullwriter, not 0, for querying SWF size
1651 if(original_writer) writer_lastpos = original_writer->pos;
1653 // Count Frames + File Size
1659 if(swf->firstTag && !no_extra_tags) {
1660 len += WriteExtraTags(swf, 0);
1663 len += swf_WriteTag(-1,t);
1664 if(t->id == ST_DEFINESPRITE && !swf_IsFolded(t)) inSprite++;
1665 else if(t->id == ST_END && inSprite) inSprite--;
1666 else if(t->id == ST_END && !inSprite) {
1667 if(t->prev && t->prev->id!=ST_SHOWFRAME)
1670 else if(t->id == ST_SHOWFRAME && !inSprite) frameCount++;
1678 memset(&t1,0x00,sizeof(TAG));
1682 { // measure header file size
1685 memset(&t2,0x00,sizeof(TAG));
1688 swf_SetRect(&t2, &swf->movieSize);
1689 swf_SetU16(&t2, swf->frameRate);
1690 swf_SetU16(&t2, swf->frameCount);
1691 l = swf_GetTagLen(&t2)+8;
1693 if(swf->compressed == 8) {
1698 if(len) {// don't touch headers without tags
1699 swf->fileSize = fileSize;
1700 swf->frameCount = frameCount;
1703 if(swf->compressed != 8) {
1704 /* compressed flag set to 8 means "skip first 8
1705 header bytes". This is necessary if the caller wants to
1706 create compressed SWFs himself .
1707 It also means that we don't initialize our own zlib
1708 writer, but assume the caller provided one.
1710 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6)) {
1712 writer->write(writer, id, 3);
1715 writer->write(writer, id, 3);
1718 writer->write(writer, &swf->fileVersion, 1);
1719 PUT32(b4, swf->fileSize);
1720 writer->write(writer, b4, 4);
1722 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6)) {
1723 writer_init_zlibdeflate(&zwriter, writer);
1728 swf_SetRect(&t1,&swf->movieSize);
1729 swf_SetU16(&t1,swf->frameRate);
1730 swf_SetU16(&t1,swf->frameCount);
1732 ret = writer->write(writer,b,swf_GetTagLen(&t1));
1733 if (ret!=swf_GetTagLen(&t1))
1736 fprintf(stderr, "ret:%d\n",ret);
1738 fprintf(stderr,"WriteSWF() failed: Header.\n");
1743 if(swf->firstTag && !no_extra_tags) {
1744 WriteExtraTags(swf, writer);
1749 if(no_extra_tags || t->id != ST_FILEATTRIBUTES) {
1750 if(swf_WriteTag2(writer, t)<0)
1755 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6) || swf->compressed==8) {
1756 if(swf->compressed != 8) {
1757 zwriter.finish(&zwriter);
1758 return original_writer->pos - writer_lastpos;
1760 return (int)fileSize;
1762 return (int)fileSize;
1767 int swf_SaveSWF(SWF * swf, char*filename)
1769 int fi = open(filename, O_BINARY|O_RDWR|O_TRUNC|O_CREAT, 0777);
1774 if(swf_WriteSWF(fi, swf)<0) {
1775 fprintf(stderr, "Unable to write output file: %s\n", filename);
1782 int swf_WriteSWF(int handle, SWF * swf) // Writes SWF to file, returns length or <0 if fails
1788 writer_init_nullwriter(&writer);
1789 len = swf_WriteSWF2(&writer, swf);
1792 writer_init_filewriter(&writer, handle);
1793 len = swf_WriteSWF2(&writer, swf);
1794 writer.finish(&writer);
1798 int swf_WriteHeader2(writer_t*writer,SWF * swf)
1801 memcpy(&myswf,swf,sizeof(SWF));
1803 return swf_WriteSWF2(writer, &myswf);
1806 int swf_WriteHeader(int handle,SWF * swf)
1809 memcpy(&myswf,swf,sizeof(SWF));
1811 return swf_WriteSWF(handle, &myswf);
1814 int swf_WriteCGI(SWF * swf)
1818 len = swf_WriteSWF(-1,swf);
1820 if (len<0) return -1;
1822 sprintf(s,"Content-type: application/x-shockwave-flash\n"
1823 "Accept-Ranges: bytes\n"
1824 "Content-Length: %lu\n"
1825 "Expires: Thu, 13 Apr 2000 23:59:59 GMT\n"
1828 write(fileno(stdout),s,strlen(s));
1829 return swf_WriteSWF(fileno(stdout),swf);
1832 SWF* swf_CopySWF(SWF*swf)
1834 SWF*nswf = (SWF*)rfx_alloc(sizeof(SWF));
1836 memcpy(nswf, swf, sizeof(SWF));
1838 tag = swf->firstTag;
1841 ntag = swf_CopyTag(ntag, tag);
1843 nswf->firstTag = ntag;
1849 void swf_FreeTags(SWF * swf) // Frees all malloc'ed memory for tags
1850 { TAG * t = swf->firstTag;
1853 { TAG * tnew = t->next;
1854 if (t->data) rfx_free(t->data);
1861 // include advanced functions
1863 //#include "modules/swfdump.c"
1864 //#include "modules/swfshape.c"
1865 //#include "modules/swftext.c"
1866 //#include "modules/swffont.c"
1867 //#include "modules/swfobject.c"
1868 //#include "modules/swfbutton.c"
1869 //#include "modules/swftools.c"
1870 //#include "modules/swfcgi.c"
1871 //#include "modules/swfbits.c"
1872 //#include "modules/swfaction.c"
1873 //#include "modules/swfabc.c"
1874 //#include "modules/swfsound.c"
1875 //#include "modules/swfdraw.c"
1876 //#include "modules/swfrender.c"
1877 //#include "modules/swffilter.c"