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"
52 #define MALLOC_SIZE 128
53 #define INSERT_RFX_TAG
55 #define MEMSIZE(l) (((l/MALLOC_SIZE)+1)*MALLOC_SIZE)
57 // inline wrapper functions
59 TAG * swf_NextTag(TAG * t) { return t->next; }
60 TAG * swf_PrevTag(TAG * t) { return t->prev; }
61 U16 swf_GetTagID(TAG * t) { return t->id; }
62 U32 swf_GetTagLen(TAG * t) { return t->len; }
63 U8* swf_GetTagLenPtr(TAG * t) { return &(t->data[t->len]); }
64 U32 swf_GetTagPos(TAG * t) { return t->pos; }
66 void swf_SetTagPos(TAG * t,U32 pos)
67 { swf_ResetReadBits(t);
68 if (pos<=t->len) t->pos = pos;
71 fprintf(stderr,"SetTagPos(%d) out of bounds: TagID = %i\n",pos, t->id);
76 char* swf_GetString(TAG*t)
79 while(t->pos < t->len && swf_GetU8(t));
80 /* make sure we always have a trailing zero byte */
81 if(t->pos == t->len) {
82 if(t->len == t->memsize) {
83 swf_ResetWriteBits(t);
89 return (char*)&(t->data[pos]);
93 { swf_ResetReadBits(t);
96 { fprintf(stderr,"GetU8() out of bounds: TagID = %i\n",t->id);
100 return t->data[t->pos++];
103 U16 swf_GetU16(TAG * t)
105 swf_ResetReadBits(t);
107 if (t->pos>(t->len-2))
108 { fprintf(stderr,"GetU16() out of bounds: TagID = %i\n",t->id);
112 res = t->data[t->pos] | (t->data[t->pos+1]<<8);
117 U32 swf_GetU32(TAG * t)
119 swf_ResetReadBits(t);
121 if (t->pos>(t->len-4))
122 { fprintf(stderr,"GetU32() out of bounds: TagID = %i\n",t->id);
126 res = t->data[t->pos] | (t->data[t->pos+1]<<8) |
127 (t->data[t->pos+2]<<16) | (t->data[t->pos+3]<<24);
132 int swf_GetBlock(TAG * t,U8 * b,int l)
133 // returns number of bytes written (<=l)
134 // b = NULL -> skip data
135 { swf_ResetReadBits(t);
136 if ((t->len-t->pos)<l) l=t->len-t->pos;
137 if (b && l) memcpy(b,&t->data[t->pos],l);
142 int swf_SetBlock(TAG * t,const U8 * b,int l)
143 // Appends Block to the end of Tagdata, returns size
144 { U32 newlen = t->len + l;
145 swf_ResetWriteBits(t);
146 if (newlen>t->memsize)
147 { U32 newmem = MEMSIZE(newlen);
148 U8 * newdata = (U8*)(rfx_realloc(t->data,newmem));
152 if (b) memcpy(&t->data[t->len],b,l);
153 else memset(&t->data[t->len],0x00,l);
158 int swf_SetU8(TAG * t,U8 v)
159 { swf_ResetWriteBits(t);
160 if ((t->len+1)>t->memsize) return (swf_SetBlock(t,&v,1)==1)?0:-1;
161 t->data[t->len++] = v;
165 int swf_SetU16(TAG * t,U16 v)
170 swf_ResetWriteBits(t);
171 if ((t->len+2)>t->memsize) return (swf_SetBlock(t,a,2)==2)?0:-1;
172 t->data[t->len++] = a[0];
173 t->data[t->len++] = a[1];
176 void swf_SetS16(TAG * t,int v)
178 if(v>32767 || v<-32768) {
179 fprintf(stderr, "Warning: S16 overflow: %d\n", v);
181 swf_SetU16(t, (S16)v);
184 int swf_SetU32(TAG * t,U32 v)
186 a[0] = v&0xff; // to ensure correct handling of non-intel byteorder
191 swf_ResetWriteBits(t);
192 if ((t->len+4)>t->memsize) return (swf_SetBlock(t,a,4)==4)?0:-1;
193 t->data[t->len++] = a[0];
194 t->data[t->len++] = a[1];
195 t->data[t->len++] = a[2];
196 t->data[t->len++] = a[3];
200 U32 swf_GetBits(TAG * t,int nbits)
202 if (!nbits) return 0;
203 if (!t->readBit) t->readBit = 0x80;
206 if (t->data[t->pos]&t->readBit) res|=1;
210 { if (nbits) t->readBit = 0x80;
213 { fprintf(stderr,"GetBits() out of bounds: TagID = %i\n",t->id);
223 S32 swf_GetSBits(TAG * t,int nbits)
224 { U32 res = swf_GetBits(t,nbits);
225 if (res&(1<<(nbits-1))) res|=(0xffffffff<<nbits);
229 U32 reader_GetBits(reader_t*reader, int nbits)
230 { return reader_readbits(reader, nbits);
232 S32 reader_GetSBits(reader_t*reader, int nbits)
233 { U32 res = reader_readbits(reader, nbits);
234 if (res&(1<<(nbits-1))) res|=(0xffffffff<<nbits);
238 int swf_SetBits(TAG * t,U32 v,int nbits)
239 { U32 bm = 1<<(nbits-1);
243 { if (FAILED(swf_SetU8(t,0))) return -1;
246 if (v&bm) t->data[t->len-1] |= t->writeBit;
254 // Advanced Data Access Functions
256 double swf_GetFixed(TAG * t)
258 U16 low = swf_GetU16(t);
259 U16 high = swf_GetU16(t);
260 return high + low*(1/65536.0);
262 void swf_SetFixed(TAG * t, double f)
264 U16 fr = (U16)((f-(int)f)*65536);
266 swf_SetU16(t, (U16)f - (f<0 && fr!=0));
268 float swf_GetFixed8(TAG * t)
270 U8 low = swf_GetU8(t);
271 U8 high = swf_GetU8(t);
272 return (float)(high + low*(1/256.0));
274 void swf_SetFixed8(TAG * t, float f)
276 U8 fr = (U8)((f-(int)f)*256);
278 swf_SetU8(t, (U8)f - (f<0 && fr!=0));
281 U32 swf_GetU30(TAG*tag)
287 U8 b = swf_GetU8(tag);
291 if(!(b&128) || shift>=32)
294 /*int nr2= swf_SetU30(0, s);
296 printf("Unsigned value %d stored in %d bytes, I'd store it in %d bytes\n", s, nr, nr2);
301 int swf_SetU30(TAG*tag, U32 u)
304 fprintf(stderr, "Error: Bit 31 set in U30 value\n");
310 swf_SetU8(tag, (u&~0x7f?0x80:0) | (u&0x7F));
317 void swf_SetABCU32(TAG*tag, U32 u)
320 swf_SetU8(tag, (u&~0x7f?0x80:0) | (u&0x7F));
324 U32 swf_GetABCU32(TAG*tag)
326 return swf_GetU30(tag);
328 void swf_SetABCS32(TAG*tag, S32 v)
330 swf_SetABCU32(tag, v);
332 S32 swf_GetABCS32(TAG*tag)
334 return swf_GetABCU32(tag);
339 /*The AVM2 spec is just plain wrong, claiming that S32 values are sign
340 extended. They're not.
341 This wastes up to 4 bytes for every negative value. */
343 void swf_SetABCS32(TAG*tag, S32 s)
345 printf("write S32: %d\n", s);
347 U8 sign = s<0?0x40:0;
353 if(s==neg && vsign==sign) {
354 /* if the value we now write has the same sign as s
355 and all the remaining bits are equal to the sign of s
358 printf("put %02x\n", val);
361 swf_SetU8(tag, 0x80 | val);
362 printf("put %02x\n", 0x80|val);
366 int swf_GetS30(TAG*tag)
372 U8 b = swf_GetU8(tag);
376 if(!(b&128) || shift>=32) {
379 s|=0xffffffff<<shift;
384 /* It's not uncommon for other applications (Flex for all negative numbers, and
385 Flash for -1) to generate a lot more bytes than would be necessary.
386 int nr2= swf_SetS30(0, s);
388 printf("Signed value %d stored in %d bytes, I'd store it in %d bytes\n", s, nr, nr2);
394 int swf_SetU30String(TAG*tag, const char*str)
398 len+=swf_SetU30(tag, l);
400 swf_SetBlock(tag, (void*)str, l);
403 double swf_GetD64(TAG*tag)
405 /* FIXME: this is not big-endian compatible */
406 double value = *(double*)&tag->data[tag->pos];
411 int swf_SetD64(TAG*tag, double v)
413 /* FIXME: this is not big-endian compatible */
414 swf_SetU32(tag, ((U32*)&v)[0]);
415 swf_SetU32(tag, ((U32*)&v)[1]);
418 int swf_GetU24(TAG*tag)
420 int b1 = swf_GetU8(tag);
421 int b2 = swf_GetU8(tag);
422 int b3 = swf_GetU8(tag);
423 return b3<<16|b2<<8|b1;
425 int swf_GetS24(TAG*tag)
427 int b1 = swf_GetU8(tag);
428 int b2 = swf_GetU8(tag);
429 int b3 = swf_GetU8(tag);
431 return -1-((b3<<16|b2<<8|b1)^0xffffff);
433 return b3<<16|b2<<8|b1;
436 int swf_SetU24(TAG*tag, U32 v)
440 fprintf(stderr, "Error: Overflow in swf_SetU24()\n");
442 swf_SetU8(tag, v>>8);
443 swf_SetU8(tag, v>>16);
447 int swf_SetS24(TAG*tag, U32 v)
451 return swf_SetU24(tag, v);
452 if((v&0xff000000)!=0xff000000) {
453 fprintf(stderr, "Error: Overflow in swf_SetS24()\n");
456 swf_SetU8(tag, v>>8);
457 swf_SetU8(tag, v>>16);
463 int swf_SetRGB(TAG * t,RGBA * col)
466 { swf_SetU8(t,col->r);
469 } else swf_SetBlock(t,NULL,3);
472 void swf_GetRGB(TAG * t, RGBA * col)
477 col->r = swf_GetU8(t);
478 col->g = swf_GetU8(t);
479 col->b = swf_GetU8(t);
483 int swf_SetRGBA(TAG * t,RGBA * col)
486 { swf_SetU8(t,col->r);
490 } else swf_SetBlock(t,NULL,4);
493 void swf_GetRGBA(TAG * t, RGBA * col)
498 col->r = swf_GetU8(t);
499 col->g = swf_GetU8(t);
500 col->b = swf_GetU8(t);
501 col->a = swf_GetU8(t);
504 void swf_GetGradient(TAG * tag, GRADIENT * gradient, char alpha)
508 memset(gradient, 0, sizeof(GRADIENT));
511 U8 num = swf_GetU8(tag) & 15;
514 gradient->rgba = (RGBA*)rfx_calloc(sizeof(RGBA)*gradient->num);
515 gradient->ratios = (U8*)rfx_calloc(sizeof(gradient->ratios[0])*gradient->num);
519 U8 ratio = swf_GetU8(tag);
522 swf_GetRGB(tag, &color);
524 swf_GetRGBA(tag, &color);
526 gradient->ratios[t] = ratio;
527 gradient->rgba[t] = color;
532 void swf_SetGradient(TAG * tag, GRADIENT * gradient, char alpha)
536 memset(gradient, 0, sizeof(GRADIENT));
539 swf_SetU8(tag, gradient->num);
540 for(t=0; t<8 && t<gradient->num; t++)
542 swf_SetU8(tag, gradient->ratios[t]);
544 swf_SetRGB(tag, &gradient->rgba[t]);
546 swf_SetRGBA(tag, &gradient->rgba[t]);
550 void swf_FreeGradient(GRADIENT* gradient)
553 rfx_free(gradient->ratios);
555 rfx_free(gradient->rgba);
556 memset(gradient, 0, sizeof(GRADIENT));
559 int swf_CountUBits(U32 v,int nbits)
562 if(v == 0x00000000) n = 0;
568 return (n>nbits)?n:nbits;
571 int swf_CountBits(U32 v,int nbits)
575 { if(v == 0xffffffff) n = 1;
583 { if(v == 0x00000000) n = 0;
590 return (n>nbits)?n:nbits;
593 int swf_GetRect(TAG * t,SRECT * r)
596 if(!t) {r->xmin=r->xmax=r->ymin=r->ymax=0;return 0;}
598 nbits = (int) swf_GetBits(t,5);
599 r->xmin = swf_GetSBits(t,nbits);
600 r->xmax = swf_GetSBits(t,nbits);
601 r->ymin = swf_GetSBits(t,nbits);
602 r->ymax = swf_GetSBits(t,nbits);
606 int reader_GetRect(reader_t*reader,SRECT * r)
610 nbits = (int) reader_GetBits(reader,5);
611 r->xmin = reader_GetSBits(reader,nbits);
612 r->xmax = reader_GetSBits(reader,nbits);
613 r->ymin = reader_GetSBits(reader,nbits);
614 r->ymax = reader_GetSBits(reader,nbits);
618 int swf_SetRect(TAG * t,SRECT * r)
621 nbits = swf_CountBits(r->xmin,0);
622 nbits = swf_CountBits(r->xmax,nbits);
623 nbits = swf_CountBits(r->ymin,nbits);
624 nbits = swf_CountBits(r->ymax,nbits);
626 fprintf(stderr, "rfxswf: Warning: num_bits overflow in swf_SetRect\n");
630 swf_SetBits(t,nbits,5);
631 swf_SetBits(t,r->xmin,nbits);
632 swf_SetBits(t,r->xmax,nbits);
633 swf_SetBits(t,r->ymin,nbits);
634 swf_SetBits(t,r->ymax,nbits);
639 SRECT swf_ClipRect(SRECT border, SRECT r)
641 if(r.xmax > border.xmax) r.xmax = border.xmax;
642 if(r.ymax > border.ymax) r.ymax = border.ymax;
643 if(r.xmax < border.xmin) r.xmax = border.xmin;
644 if(r.ymax < border.ymin) r.ymax = border.ymin;
646 if(r.xmin > border.xmax) r.xmin = border.xmax;
647 if(r.ymin > border.ymax) r.ymin = border.ymax;
648 if(r.xmin < border.xmin) r.xmin = border.xmin;
649 if(r.ymin < border.ymin) r.ymin = border.ymin;
653 void swf_ExpandRect(SRECT*src, SPOINT add)
655 if((src->xmin | src->ymin | src->xmax | src->ymax)==0) {
660 if((add.x|add.y) == 0) src->xmax++; //make sure the bbox is not NULL anymore
663 if(add.x < src->xmin)
665 if(add.x > src->xmax)
667 if(add.y < src->ymin)
669 if(add.y > src->ymax)
672 void swf_ExpandRect2(SRECT*src, SRECT*add)
674 if((add->xmin | add->ymin | add->xmax | add->ymax)==0)
676 if((src->xmin | src->ymin | src->xmax | src->ymax)==0)
678 if(add->xmin < src->xmin)
679 src->xmin = add->xmin;
680 if(add->ymin < src->ymin)
681 src->ymin = add->ymin;
682 if(add->xmax > src->xmax)
683 src->xmax = add->xmax;
684 if(add->ymax > src->ymax)
685 src->ymax = add->ymax;
687 void swf_ExpandRect3(SRECT*src, SPOINT center, int radius)
689 if((src->xmin | src->ymin | src->xmax | src->ymax)==0) {
690 src->xmin = center.x-radius;
691 src->ymin = center.y-radius;
692 src->xmax = center.x+radius;
693 src->ymax = center.y+radius;
694 if((center.x|center.y|radius) == 0) src->xmax++; //make sure the bbox is not NULL anymore
697 if(center.x - radius < src->xmin)
698 src->xmin = center.x - radius;
699 if(center.x + radius > src->xmax)
700 src->xmax = center.x + radius;
701 if(center.y - radius < src->ymin)
702 src->ymin = center.y - radius;
703 if(center.y + radius > src->ymax)
704 src->ymax = center.y + radius;
706 SPOINT swf_TurnPoint(SPOINT p, MATRIX* m)
709 r.x = (int)(m->sx*(1/65536.0)*p.x + m->r1*(1/65536.0)*p.y + 0.5) + m->tx;
710 r.y = (int)(m->r0*(1/65536.0)*p.x + m->sy*(1/65536.0)*p.y + 0.5) + m->ty;
713 SRECT swf_TurnRect(SRECT r, MATRIX* m)
716 SPOINT p1,p2,p3,p4,pp1,pp2,pp3,pp4;
719 p1.x = r.xmin;p1.y = r.ymin;
720 p2.x = r.xmax;p2.y = r.ymin;
721 p3.x = r.xmin;p3.y = r.ymax;
722 p4.x = r.xmax;p4.y = r.ymax;
723 pp1 = swf_TurnPoint(p1, m);
724 pp2 = swf_TurnPoint(p2, m);
725 pp3 = swf_TurnPoint(p3, m);
726 pp4 = swf_TurnPoint(p4, m);
727 g.xmin = g.xmax = pp1.x;
728 g.ymin = g.ymax = pp1.y;
729 swf_ExpandRect(&g, pp2);
730 swf_ExpandRect(&g, pp3);
731 swf_ExpandRect(&g, pp4);
736 int swf_GetMatrix(TAG * t,MATRIX * m)
743 { m->sx = m->sy = 0x10000;
749 swf_ResetReadBits(t);
751 if (swf_GetBits(t,1))
752 { nbits = swf_GetBits(t,5);
753 m->sx = swf_GetSBits(t,nbits);
754 m->sy = swf_GetSBits(t,nbits);
756 else m->sx = m->sy = 0x10000;
758 if (swf_GetBits(t,1))
759 { nbits = swf_GetBits(t,5);
760 m->r0 = swf_GetSBits(t,nbits);
761 m->r1 = swf_GetSBits(t,nbits);
763 else m->r0 = m->r1 = 0x0;
765 nbits = swf_GetBits(t,5);
766 m->tx = swf_GetSBits(t,nbits);
767 m->ty = swf_GetSBits(t,nbits);
772 int swf_SetMatrix(TAG * t,MATRIX * m)
778 ma.sx = ma.sy = 0x10000;
783 swf_ResetWriteBits(t);
785 if ((m->sx==0x10000)&&(m->sy==0x10000)) swf_SetBits(t,0,1);
787 { swf_SetBits(t,1,1);
788 nbits = swf_CountBits(m->sx,0);
789 nbits = swf_CountBits(m->sy,nbits);
791 /* TODO: happens on AMD64 systems for normal values? */
792 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
795 swf_SetBits(t,nbits,5);
796 swf_SetBits(t,m->sx,nbits);
797 swf_SetBits(t,m->sy,nbits);
800 if ((!m->r0)&&(!m->r1)) swf_SetBits(t,0,1);
802 { swf_SetBits(t,1,1);
803 nbits = swf_CountBits(m->r0,0);
804 nbits = swf_CountBits(m->r1,nbits);
806 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
809 swf_SetBits(t,nbits,5);
810 swf_SetBits(t,m->r0,nbits);
811 swf_SetBits(t,m->r1,nbits);
814 nbits = swf_CountBits(m->tx,0);
815 nbits = swf_CountBits(m->ty,nbits);
817 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
820 swf_SetBits(t,nbits,5);
821 swf_SetBits(t,m->tx,nbits);
822 swf_SetBits(t,m->ty,nbits);
827 int swf_GetCXForm(TAG * t,CXFORM * cx,U8 alpha)
835 cx->a0 = cx->r0 = cx->g0 = cx->b0 = 256;
836 cx->a1 = cx->r1 = cx->g1 = cx->b1 = 0;
840 swf_ResetReadBits(t);
841 hasadd = swf_GetBits(t,1);
842 hasmul = swf_GetBits(t,1);
843 nbits = swf_GetBits(t,4);
846 { cx->r0 = (S16)swf_GetSBits(t,nbits);
847 cx->g0 = (S16)swf_GetSBits(t,nbits);
848 cx->b0 = (S16)swf_GetSBits(t,nbits);
850 cx->a0 = (S16)swf_GetSBits(t,nbits);
854 { cx->r1 = (S16)swf_GetSBits(t,nbits);
855 cx->g1 = (S16)swf_GetSBits(t,nbits);
856 cx->b1 = (S16)swf_GetSBits(t,nbits);
858 cx->a1 = (S16)swf_GetSBits(t,nbits);
864 int swf_SetCXForm(TAG * t,CXFORM * cx,U8 alpha)
872 cx->a0 = cx->r0 = cx->g0 = cx->b0 = 256;
873 cx->a1 = cx->r1 = cx->g1 = cx->b1 = 0;
883 hasmul = (cx->a0!=256)||(cx->r0!=256)||(cx->g0!=256)||(cx->b0!=256);
884 hasadd = cx->a1|cx->r1|cx->g1|cx->b1;
887 { if (alpha) nbits = swf_CountBits((S32)cx->a0,nbits);
888 nbits = swf_CountBits((S32)cx->r0,nbits);
889 nbits = swf_CountBits((S32)cx->g0,nbits);
890 nbits = swf_CountBits((S32)cx->b0,nbits);
894 { if (alpha) nbits = swf_CountBits((S32)cx->a1,nbits);
895 nbits = swf_CountBits((S32)cx->r1,nbits);
896 nbits = swf_CountBits((S32)cx->g1,nbits);
897 nbits = swf_CountBits((S32)cx->b1,nbits);
900 swf_ResetWriteBits(t);
901 swf_SetBits(t,hasadd?1:0,1);
902 swf_SetBits(t,hasmul?1:0,1);
903 swf_SetBits(t,nbits,4);
906 { swf_SetBits(t,cx->r0,nbits);
907 swf_SetBits(t,cx->g0,nbits);
908 swf_SetBits(t,cx->b0,nbits);
909 if (alpha) swf_SetBits(t,cx->a0,nbits);
913 { swf_SetBits(t,cx->r1,nbits);
914 swf_SetBits(t,cx->g1,nbits);
915 swf_SetBits(t,cx->b1,nbits);
916 if (alpha) swf_SetBits(t,cx->a1,nbits);
922 //int swf_GetPoint(TAG * t,SPOINT * p) { return 0; }
923 //int swf_SetPoint(TAG * t,SPOINT * p) { return 0; }
925 void swf_SetPassword(TAG * t, const char * password)
927 /* WARNING: crypt_md5 is not reentrant */
931 #if defined(HAVE_LRAND48) && defined(HAVE_SRAND48) && defined(HAVE_TIME_H) && defined(HAVE_TIME)
933 salt[0] = "abcdefghijklmnopqrstuvwxyz0123456789"[lrand48()%36];
934 salt[1] = "abcdefghijklmnopqrstuvwxyz0123456789"[lrand48()%36];
938 fprintf(stderr, "rfxswf: Warning- no usable random generator found\n");
939 fprintf(stderr, "Your password will be vulnerable to dictionary attacks\n");
943 md5string = crypt_md5(password, salt);
946 swf_SetString(t, (U8*)md5string);
949 void swf_SetString(TAG*t, const char* s)
954 swf_SetBlock(t,s,strlen(s)+1);
958 int swf_VerifyPassword(TAG * t, const char * password)
960 char*md5string1, *md5string2;
965 if(t->len >= 5 && t->pos==0 &&
970 printf("%d %d %d %d\n", t->len, t->pos, t->data[0], t->data[1]);
973 md5string1 = swf_GetString(t);
975 if(strncmp(md5string1, "$1$",3 )) {
976 fprintf(stderr, "rfxswf: no salt in pw string\n");
979 x = strchr(md5string1+3, '$');
981 fprintf(stderr, "rfxswf: invalid salt format in pw string\n");
984 n = x-(md5string1+3);
985 salt = (char*)rfx_alloc(n+1);
986 memcpy(salt, md5string1+3, n);
989 md5string2 = crypt_md5(password, salt);
991 if(strcmp(md5string1, md5string2) != 0)
996 // Tag List Manipulating Functions
998 TAG * swf_InsertTag(TAG * after,U16 id)
1001 t = (TAG *)rfx_calloc(sizeof(TAG));
1007 t->next = after->next;
1009 if (t->next) t->next->prev = t;
1014 TAG * swf_InsertTagBefore(SWF* swf, TAG * before,U16 id)
1017 t = (TAG *)rfx_calloc(sizeof(TAG));
1023 t->prev = before->prev;
1025 if (t->prev) t->prev->next = t;
1027 if(swf && swf->firstTag == before) {
1033 void swf_ClearTag(TAG * t)
1035 if (t->data) rfx_free(t->data);
1044 void swf_ResetTag(TAG*tag, U16 id)
1046 tag->len = tag->pos = tag->readBit = tag->writeBit = 0;
1050 TAG* swf_CopyTag(TAG*tag, TAG*to_copy)
1052 tag = swf_InsertTag(tag, to_copy->id);
1053 swf_SetBlock(tag, to_copy->data, to_copy->len);
1057 TAG* swf_DeleteTag(SWF*swf, TAG * t)
1061 if (swf && swf->firstTag==t)
1062 swf->firstTag = t->next;
1063 if (t->prev) t->prev->next = t->next;
1064 if (t->next) t->next->prev = t->prev;
1066 if (t->data) rfx_free(t->data);
1071 TAG * swf_ReadTag(reader_t*reader, TAG * prev)
1077 if (reader->read(reader, &raw, 2) !=2 ) return NULL;
1085 if (reader->read(reader, &len, 4) != 4) return NULL;
1089 if (id==ST_DEFINESPRITE) len = 2*sizeof(U16);
1090 // Sprite handling fix: Flatten sprite tree
1092 t = (TAG *)rfx_calloc(sizeof(TAG));
1098 { t->data = (U8*)rfx_alloc(t->len);
1099 t->memsize = t->len;
1100 if (reader->read(reader, t->data, t->len) != t->len) {
1101 fprintf(stderr, "rfxswf: Warning: Short read (tagid %d). File truncated?\n", t->id);
1102 free(t->data);t->data=0;
1117 int swf_DefineSprite_GetRealSize(TAG * t);
1119 int swf_WriteTag2(writer_t*writer, TAG * t)
1120 // returns tag length in bytes (incl. Header), -1 = Error
1121 // writer = 0 -> no output
1128 len = (t->id==ST_DEFINESPRITE)?swf_DefineSprite_GetRealSize(t):t->len;
1130 short_tag = len<0x3f&&
1131 (t->id!=ST_DEFINEBITSLOSSLESS&&t->id!=ST_DEFINEBITSLOSSLESS2&&t->id!=ST_SOUNDSTREAMBLOCK&&
1132 t->id!=ST_DEFINEBITSJPEG&&t->id!=ST_DEFINEBITSJPEG2&&t->id!=ST_DEFINEBITSJPEG3);
1137 int oldpos = writer->pos;
1141 { raw[0] = SWAP16(len|((t->id&0x3ff)<<6));
1142 if (writer->write(writer,raw,2)!=2)
1145 fprintf(stderr,"WriteTag() failed: Short Header.\n");
1152 raw[0] = SWAP16((t->id<<6)|0x3f);
1153 if (writer->write(writer,raw,2)!=2)
1156 fprintf(stderr,"WriteTag() failed: Long Header (1).\n");
1162 if (writer->write(writer,&len,4)!=4)
1165 fprintf(stderr,"WriteTag() failed: Long Header (2).\n");
1172 { if (writer->write(writer,t->data,t->len)!=t->len)
1175 fprintf(stderr,"WriteTag() failed: Data.\n");
1181 else if (t->len) fprintf(stderr,"WriteTag(): Tag Data Error, id=%i\n",t->id);
1185 writer->flush(writer);
1186 printf("TAG %s costs %d bytes\n", swf_TagGetName(t), writer->pos-oldpos);
1190 return t->len+(short_tag?2:6);
1193 int swf_WriteTag(int handle, TAG * t)
1198 return swf_WriteTag2(0, t);
1199 writer_init_filewriter(&writer, handle);
1200 len = swf_WriteTag2(&writer, t);
1201 writer.finish(&writer);
1205 int swf_DefineSprite_GetRealSize(TAG * t)
1206 // Sprite Handling: Helper function to pack DefineSprite-Tag
1208 if(len>4) { // folded sprite
1212 { t = swf_NextTag(t);
1213 if (t && t->id!=ST_DEFINESPRITE) len += swf_WriteTag(-1, t);
1215 } while (t&&(t->id!=ST_END));
1219 void swf_UnFoldSprite(TAG * t)
1224 U16 spriteid,spriteframes;
1226 if(t->id!=ST_DEFINESPRITE)
1228 if(t->len<=4) // not folded
1233 spriteid = swf_GetU16(t); //id
1234 spriteframes = swf_GetU16(t); //frames
1241 tmp = swf_GetU16(t);
1246 if(id == ST_DEFINESPRITE && len<=4)
1250 len = swf_GetU32(t);
1251 it = swf_InsertTag(next, id);
1256 { it->data = (U8*)rfx_alloc(it->len);
1257 it->memsize = it->len;
1258 swf_GetBlock(t, it->data, it->len);
1265 rfx_free(t->data); t->data = 0;
1266 t->memsize = t->len = t->pos = 0;
1268 swf_SetU16(t, spriteid);
1269 swf_SetU16(t, spriteframes);
1272 void swf_FoldSprite(TAG * t)
1277 if(t->id!=ST_DEFINESPRITE)
1280 fprintf(stderr, "Error: Sprite has no ID!");
1284 /* sprite is already folded */
1291 t->len = t->pos = t->memsize = 0;
1296 t = swf_NextTag(sprtag);
1301 if(t->id==ST_SHOWFRAME) frames++;
1302 if(t->id == ST_DEFINESPRITE && t->len<=4)
1307 } while(t && level);
1309 fprintf(stderr, "rfxswf error: sprite doesn't end(1)\n");
1311 swf_SetU16(sprtag, id);
1312 swf_SetU16(sprtag, frames);
1314 t = swf_NextTag(sprtag);
1320 (t->id!=ST_DEFINEBITSLOSSLESS&&t->id!=ST_DEFINEBITSLOSSLESS2&&t->id!=ST_SOUNDSTREAMBLOCK&&
1321 t->id!=ST_DEFINEBITSJPEG&&t->id!=ST_DEFINEBITSJPEG2&&t->id!=ST_DEFINEBITSJPEG3)
1323 swf_SetU16(sprtag,t->len|(t->id<<6));
1325 swf_SetU16(sprtag,0x3f|(t->id<<6));
1326 swf_SetU32(sprtag,t->len);
1329 swf_SetBlock(sprtag,t->data, t->len);
1331 if(t->id == ST_DEFINESPRITE && t->len<=4)
1336 swf_DeleteTag(0, tmp);
1340 fprintf(stderr, "rfxswf error: sprite doesn't end(2)\n");
1342 // sprtag->next = t;
1343 // t->prev = sprtag;
1346 int swf_IsFolded(TAG * t)
1348 return (t->id == ST_DEFINESPRITE && t->len>4);
1351 void swf_FoldAll(SWF*swf)
1353 TAG*tag = swf->firstTag;
1354 //swf_DumpSWF(stdout, swf);
1356 if(tag->id == ST_DEFINESPRITE) {
1357 swf_FoldSprite(tag);
1358 //swf_DumpSWF(stdout, swf);
1360 tag = swf_NextTag(tag);
1364 void swf_UnFoldAll(SWF*swf)
1366 TAG*tag = swf->firstTag;
1368 if(tag->id == ST_DEFINESPRITE)
1369 swf_UnFoldSprite(tag);
1374 void swf_OptimizeTagOrder(SWF*swf)
1381 /* at the moment, we don't actually do optimizing,
1382 only fixing of non-spec-conformant things like
1389 tag = swf->firstTag;
1392 if(tag->id == ST_DEFINESPRITE) {
1394 /* ??? all sprites are supposed to be unfolded */
1395 fprintf(stderr, "librfxswf error - internal error in OptimizeTagOrder/UnfoldAll\n");
1405 /* move non-sprite tags out of sprite */
1406 if(!swf_isAllowedSpriteTag(tag) || level>=2) {
1407 /* remove tag from current position */
1408 tag->prev->next = tag->next;
1410 tag->next->prev = tag->prev;
1412 /* insert before tag level0 */
1414 tag->prev = level0->prev;
1417 tag->prev->next = tag;
1419 swf->firstTag = tag;
1423 if(tag->id == ST_END) {
1434 int swf_ReadSWF2(reader_t*reader, SWF * swf) // Reads SWF to memory (malloc'ed), returns length or <0 if fails
1436 if (!swf) return -1;
1437 memset(swf,0x00,sizeof(SWF));
1439 { char b[32]; // read Header
1445 if ((len = reader->read(reader ,b,8))<8) return -1;
1447 if (b[0]!='F' && b[0]!='C') return -1;
1448 if (b[1]!='W') return -1;
1449 if (b[2]!='S') return -1;
1450 swf->fileVersion = b[3];
1451 swf->compressed = (b[0]=='C')?1:0;
1452 swf->fileSize = GET32(&b[4]);
1454 if(swf->compressed) {
1455 reader_init_zlibinflate(&zreader, reader);
1458 swf->compressed = 0; // derive from version number from now on
1460 reader_GetRect(reader, &swf->movieSize);
1461 reader->read(reader, &swf->frameRate, 2);
1462 swf->frameRate = SWAP16(swf->frameRate);
1463 reader->read(reader, &swf->frameCount, 2);
1464 swf->frameCount = SWAP16(swf->frameCount);
1466 /* read tags and connect to list */
1469 t = swf_ReadTag(reader,t);
1470 if(t && t->id == ST_FILEATTRIBUTES) {
1471 swf->fileAttributes = swf_GetU32(t);
1472 swf_ResetReadBits(t);
1475 swf->firstTag = t1.next;
1476 t1.next->prev = NULL;
1482 int swf_ReadSWF(int handle, SWF * swf)
1485 reader_init_filereader(&reader, handle);
1486 return swf_ReadSWF2(&reader, swf);
1489 int no_extra_tags = 0;
1491 int WriteExtraTags(SWF*swf, writer_t*writer)
1493 TAG*t = swf->firstTag;
1494 TAG* has_fileattributes=0;
1495 int has_scenedescription=0;
1496 int has_version_8_action=0;
1497 int has_version_9_action=0;
1500 if(t->id == ST_FILEATTRIBUTES)
1501 has_fileattributes = t;
1502 if(t->id == ST_SCENEDESCRIPTION)
1503 has_scenedescription = 1;
1504 if(t->id == ST_DOABC)
1505 has_version_9_action=1;
1506 /* FIXME: this doesn't yet find actionscript in buttons */
1507 if(t->id == ST_DOACTION || t->id == ST_DOINITACTION)
1508 has_version_8_action=1;
1509 if(t->id == ST_PLACEOBJECT2 && t->len && (t->data[0]&0x80))
1510 has_version_8_action=1;
1513 if(has_version_8_action && has_version_9_action) {
1514 fprintf(stderr, "Warning: File contains both flash 8 and flash 9 actionscript\n");
1517 if(swf->fileVersion >= 9) {
1518 if(!has_fileattributes) {
1519 U32 flags = swf->fileAttributes|0x08; // 16 = has symbolclass tag | 8 = actionscript3 | 1 = usenetwork
1520 if(has_version_8_action && !has_version_9_action)
1522 TAG*fileattrib = swf_InsertTag(0, ST_FILEATTRIBUTES);
1523 swf_SetU32(fileattrib, flags);
1525 if(swf_WriteTag2(writer, fileattrib)<0)
1528 len += swf_WriteTag(-1,fileattrib);
1530 swf_DeleteTag(0, fileattrib);
1532 if(swf_WriteTag2(writer, has_fileattributes)<0)
1535 if(!has_scenedescription) {
1536 TAG*scene = swf_InsertTag(0, ST_SCENEDESCRIPTION);
1537 swf_SetU16(scene, 1);
1538 swf_SetString(scene, (U8*)"Scene 1");
1539 swf_SetU8(scene, 0);
1541 if(swf_WriteTag2(writer, scene)<0)
1544 len += swf_WriteTag(-1,scene);
1546 swf_DeleteTag(0, scene);
1552 int swf_WriteSWF2(writer_t*writer, SWF * swf) // Writes SWF to file, returns length or <0 if fails
1560 writer_t*original_writer = writer;
1561 int writer_lastpos = 0;
1563 if (!swf) return -1;
1564 if (!writer) return -1; // the caller should provide a nullwriter, not 0, for querying SWF size
1566 if(original_writer) writer_lastpos = original_writer->pos;
1568 // Count Frames + File Size
1574 len += WriteExtraTags(swf, 0);
1576 len += swf_WriteTag(-1,t);
1577 if(t->id == ST_DEFINESPRITE && !swf_IsFolded(t)) inSprite++;
1578 else if(t->id == ST_END && inSprite) inSprite--;
1579 else if(t->id == ST_END && !inSprite) {
1580 if(t->prev && t->prev->id!=ST_SHOWFRAME)
1583 else if(t->id == ST_SHOWFRAME && !inSprite) frameCount++;
1591 memset(&t1,0x00,sizeof(TAG));
1595 { // measure header file size
1598 memset(&t2,0x00,sizeof(TAG));
1601 swf_SetRect(&t2, &swf->movieSize);
1602 swf_SetU16(&t2, swf->frameRate);
1603 swf_SetU16(&t2, swf->frameCount);
1604 l = swf_GetTagLen(&t2)+8;
1606 if(swf->compressed == 8) {
1611 if(len) {// don't touch headers without tags
1612 swf->fileSize = fileSize;
1613 swf->frameCount = frameCount;
1616 if(swf->compressed != 8) {
1617 /* compressed flag set to 8 means "skip first 8
1618 header bytes". This is necessary if the caller wants to
1619 create compressed SWFs himself .
1620 It also means that we don't initialize our own zlib
1621 writer, but assume the caller provided one.
1623 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6)) {
1625 writer->write(writer, id, 3);
1628 writer->write(writer, id, 3);
1631 writer->write(writer, &swf->fileVersion, 1);
1632 PUT32(b4, swf->fileSize);
1633 writer->write(writer, b4, 4);
1635 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6)) {
1636 writer_init_zlibdeflate(&zwriter, writer);
1641 swf_SetRect(&t1,&swf->movieSize);
1642 swf_SetU16(&t1,swf->frameRate);
1643 swf_SetU16(&t1,swf->frameCount);
1645 ret = writer->write(writer,b,swf_GetTagLen(&t1));
1646 if (ret!=swf_GetTagLen(&t1))
1649 fprintf(stderr, "ret:%d\n",ret);
1651 fprintf(stderr,"WriteSWF() failed: Header.\n");
1656 if(!no_extra_tags) {
1657 WriteExtraTags(swf, writer);
1662 if(no_extra_tags || t->id != ST_FILEATTRIBUTES) {
1663 if(swf_WriteTag2(writer, t)<0)
1668 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6) || swf->compressed==8) {
1669 if(swf->compressed != 8) {
1670 zwriter.finish(&zwriter);
1671 return original_writer->pos - writer_lastpos;
1673 return (int)fileSize;
1675 return (int)fileSize;
1680 int swf_WriteSWF(int handle, SWF * swf) // Writes SWF to file, returns length or <0 if fails
1686 writer_init_nullwriter(&writer);
1687 len = swf_WriteSWF2(&writer, swf);
1690 writer_init_filewriter(&writer, handle);
1691 len = swf_WriteSWF2(&writer, swf);
1692 writer.finish(&writer);
1696 int swf_WriteHeader2(writer_t*writer,SWF * swf)
1699 memcpy(&myswf,swf,sizeof(SWF));
1701 return swf_WriteSWF2(writer, &myswf);
1704 int swf_WriteHeader(int handle,SWF * swf)
1707 memcpy(&myswf,swf,sizeof(SWF));
1709 return swf_WriteSWF(handle, &myswf);
1712 int swf_WriteCGI(SWF * swf)
1716 len = swf_WriteSWF(-1,swf);
1718 if (len<0) return -1;
1720 sprintf(s,"Content-type: application/x-shockwave-flash\n"
1721 "Accept-Ranges: bytes\n"
1722 "Content-Length: %lu\n"
1723 "Expires: Thu, 13 Apr 2000 23:59:59 GMT\n"
1726 write(fileno(stdout),s,strlen(s));
1727 return swf_WriteSWF(fileno(stdout),swf);
1730 SWF* swf_CopySWF(SWF*swf)
1732 SWF*nswf = (SWF*)rfx_alloc(sizeof(SWF));
1734 memcpy(nswf, swf, sizeof(SWF));
1736 tag = swf->firstTag;
1739 ntag = swf_CopyTag(ntag, tag);
1741 nswf->firstTag = ntag;
1747 void swf_FreeTags(SWF * swf) // Frees all malloc'ed memory for tags
1748 { TAG * t = swf->firstTag;
1751 { TAG * tnew = t->next;
1752 if (t->data) rfx_free(t->data);
1759 // include advanced functions
1761 //#include "modules/swfdump.c"
1762 //#include "modules/swfshape.c"
1763 //#include "modules/swftext.c"
1764 //#include "modules/swffont.c"
1765 //#include "modules/swfobject.c"
1766 //#include "modules/swfbutton.c"
1767 //#include "modules/swftools.c"
1768 //#include "modules/swfcgi.c"
1769 //#include "modules/swfbits.c"
1770 //#include "modules/swfaction.c"
1771 //#include "modules/swfabc.c"
1772 //#include "modules/swfsound.c"
1773 //#include "modules/swfdraw.c"
1774 //#include "modules/swfrender.c"
1775 //#include "modules/swffilter.c"