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
418 fprintf(stderr, "%f = %d-%d-%x\n", *(float*)&f2, f1>>15, (f1>>10)&31, f1&0x3ff);
421 void swf_SetF16(TAG * t, float f)
424 U16 f2 = (f1>>16)&0x8000;
425 int exp = ((f1>>23)&0xff)-0x80+0x10;
428 fprintf(stderr, "Exponent underflow in FLOAT16 encoding\n");
431 fprintf(stderr, "Exponent overflow in FLOAT16 encoding\n");
434 f2 |= (f1>>13)&0x3ff;
438 double swf_GetD64(TAG*tag)
440 /* FIXME: this is not big-endian compatible */
441 double value = *(double*)&tag->data[tag->pos];
446 int swf_SetD64(TAG*tag, double v)
448 /* FIXME: this is not big-endian compatible */
449 swf_SetU32(tag, ((U32*)&v)[0]);
450 swf_SetU32(tag, ((U32*)&v)[1]);
453 int swf_GetU24(TAG*tag)
455 int b1 = swf_GetU8(tag);
456 int b2 = swf_GetU8(tag);
457 int b3 = swf_GetU8(tag);
458 return b3<<16|b2<<8|b1;
460 int swf_GetS24(TAG*tag)
462 int b1 = swf_GetU8(tag);
463 int b2 = swf_GetU8(tag);
464 int b3 = swf_GetU8(tag);
466 return -1-((b3<<16|b2<<8|b1)^0xffffff);
468 return b3<<16|b2<<8|b1;
471 int swf_SetU24(TAG*tag, U32 v)
475 fprintf(stderr, "Error: Overflow in swf_SetU24()\n");
477 swf_SetU8(tag, v>>8);
478 swf_SetU8(tag, v>>16);
482 int swf_SetS24(TAG*tag, U32 v)
486 return swf_SetU24(tag, v);
487 if((v&0xff000000)!=0xff000000) {
488 fprintf(stderr, "Error: Overflow in swf_SetS24()\n");
491 swf_SetU8(tag, v>>8);
492 swf_SetU8(tag, v>>16);
498 int swf_SetRGB(TAG * t,RGBA * col)
501 { swf_SetU8(t,col->r);
504 } else swf_SetBlock(t,NULL,3);
507 void swf_GetRGB(TAG * t, RGBA * col)
512 col->r = swf_GetU8(t);
513 col->g = swf_GetU8(t);
514 col->b = swf_GetU8(t);
518 int swf_SetRGBA(TAG * t,RGBA * col)
521 { swf_SetU8(t,col->r);
525 } else swf_SetBlock(t,NULL,4);
528 void swf_GetRGBA(TAG * t, RGBA * col)
533 col->r = swf_GetU8(t);
534 col->g = swf_GetU8(t);
535 col->b = swf_GetU8(t);
536 col->a = swf_GetU8(t);
539 void swf_GetGradient(TAG * tag, GRADIENT * gradient, char alpha)
543 memset(gradient, 0, sizeof(GRADIENT));
546 U8 num = swf_GetU8(tag) & 15;
549 gradient->rgba = (RGBA*)rfx_calloc(sizeof(RGBA)*gradient->num);
550 gradient->ratios = (U8*)rfx_calloc(sizeof(gradient->ratios[0])*gradient->num);
554 U8 ratio = swf_GetU8(tag);
557 swf_GetRGB(tag, &color);
559 swf_GetRGBA(tag, &color);
561 gradient->ratios[t] = ratio;
562 gradient->rgba[t] = color;
567 void swf_SetGradient(TAG * tag, GRADIENT * gradient, char alpha)
571 memset(gradient, 0, sizeof(GRADIENT));
574 swf_SetU8(tag, gradient->num);
575 for(t=0; t<8 && t<gradient->num; t++)
577 swf_SetU8(tag, gradient->ratios[t]);
579 swf_SetRGB(tag, &gradient->rgba[t]);
581 swf_SetRGBA(tag, &gradient->rgba[t]);
585 void swf_FreeGradient(GRADIENT* gradient)
588 rfx_free(gradient->ratios);
590 rfx_free(gradient->rgba);
591 memset(gradient, 0, sizeof(GRADIENT));
594 int swf_CountUBits(U32 v,int nbits)
597 if(v == 0x00000000) n = 0;
603 return (n>nbits)?n:nbits;
606 int swf_CountBits(U32 v,int nbits)
610 { if(v == 0xffffffff) n = 1;
618 { if(v == 0x00000000) n = 0;
625 return (n>nbits)?n:nbits;
628 int swf_GetRect(TAG * t,SRECT * r)
631 if(!t) {r->xmin=r->xmax=r->ymin=r->ymax=0;return 0;}
633 nbits = (int) swf_GetBits(t,5);
634 r->xmin = swf_GetSBits(t,nbits);
635 r->xmax = swf_GetSBits(t,nbits);
636 r->ymin = swf_GetSBits(t,nbits);
637 r->ymax = swf_GetSBits(t,nbits);
641 int reader_GetRect(reader_t*reader,SRECT * r)
645 nbits = (int) reader_GetBits(reader,5);
646 r->xmin = reader_GetSBits(reader,nbits);
647 r->xmax = reader_GetSBits(reader,nbits);
648 r->ymin = reader_GetSBits(reader,nbits);
649 r->ymax = reader_GetSBits(reader,nbits);
653 int swf_SetRect(TAG * t,SRECT * r)
656 nbits = swf_CountBits(r->xmin,0);
657 nbits = swf_CountBits(r->xmax,nbits);
658 nbits = swf_CountBits(r->ymin,nbits);
659 nbits = swf_CountBits(r->ymax,nbits);
661 fprintf(stderr, "rfxswf: Warning: num_bits overflow in swf_SetRect\n");
665 swf_SetBits(t,nbits,5);
666 swf_SetBits(t,r->xmin,nbits);
667 swf_SetBits(t,r->xmax,nbits);
668 swf_SetBits(t,r->ymin,nbits);
669 swf_SetBits(t,r->ymax,nbits);
674 SRECT swf_ClipRect(SRECT border, SRECT r)
676 if(r.xmax > border.xmax) r.xmax = border.xmax;
677 if(r.ymax > border.ymax) r.ymax = border.ymax;
678 if(r.xmax < border.xmin) r.xmax = border.xmin;
679 if(r.ymax < border.ymin) r.ymax = border.ymin;
681 if(r.xmin > border.xmax) r.xmin = border.xmax;
682 if(r.ymin > border.ymax) r.ymin = border.ymax;
683 if(r.xmin < border.xmin) r.xmin = border.xmin;
684 if(r.ymin < border.ymin) r.ymin = border.ymin;
688 void swf_ExpandRect(SRECT*src, SPOINT add)
690 if((src->xmin | src->ymin | src->xmax | src->ymax)==0) {
695 if((add.x|add.y) == 0) src->xmax++; //make sure the bbox is not NULL anymore
698 if(add.x < src->xmin)
700 if(add.x > src->xmax)
702 if(add.y < src->ymin)
704 if(add.y > src->ymax)
707 void swf_ExpandRect2(SRECT*src, SRECT*add)
709 if((add->xmin | add->ymin | add->xmax | add->ymax)==0)
711 if((src->xmin | src->ymin | src->xmax | src->ymax)==0)
713 if(add->xmin < src->xmin)
714 src->xmin = add->xmin;
715 if(add->ymin < src->ymin)
716 src->ymin = add->ymin;
717 if(add->xmax > src->xmax)
718 src->xmax = add->xmax;
719 if(add->ymax > src->ymax)
720 src->ymax = add->ymax;
722 void swf_ExpandRect3(SRECT*src, SPOINT center, int radius)
724 if((src->xmin | src->ymin | src->xmax | src->ymax)==0) {
725 src->xmin = center.x-radius;
726 src->ymin = center.y-radius;
727 src->xmax = center.x+radius;
728 src->ymax = center.y+radius;
729 if((center.x|center.y|radius) == 0) src->xmax++; //make sure the bbox is not NULL anymore
732 if(center.x - radius < src->xmin)
733 src->xmin = center.x - radius;
734 if(center.x + radius > src->xmax)
735 src->xmax = center.x + radius;
736 if(center.y - radius < src->ymin)
737 src->ymin = center.y - radius;
738 if(center.y + radius > src->ymax)
739 src->ymax = center.y + radius;
741 SPOINT swf_TurnPoint(SPOINT p, MATRIX* m)
744 r.x = (int)(m->sx*(1/65536.0)*p.x + m->r1*(1/65536.0)*p.y + 0.5) + m->tx;
745 r.y = (int)(m->r0*(1/65536.0)*p.x + m->sy*(1/65536.0)*p.y + 0.5) + m->ty;
748 SRECT swf_TurnRect(SRECT r, MATRIX* m)
751 SPOINT p1,p2,p3,p4,pp1,pp2,pp3,pp4;
754 p1.x = r.xmin;p1.y = r.ymin;
755 p2.x = r.xmax;p2.y = r.ymin;
756 p3.x = r.xmin;p3.y = r.ymax;
757 p4.x = r.xmax;p4.y = r.ymax;
758 pp1 = swf_TurnPoint(p1, m);
759 pp2 = swf_TurnPoint(p2, m);
760 pp3 = swf_TurnPoint(p3, m);
761 pp4 = swf_TurnPoint(p4, m);
762 g.xmin = g.xmax = pp1.x;
763 g.ymin = g.ymax = pp1.y;
764 swf_ExpandRect(&g, pp2);
765 swf_ExpandRect(&g, pp3);
766 swf_ExpandRect(&g, pp4);
771 int swf_GetMatrix(TAG * t,MATRIX * m)
778 { m->sx = m->sy = 0x10000;
784 swf_ResetReadBits(t);
786 if (swf_GetBits(t,1))
787 { nbits = swf_GetBits(t,5);
788 m->sx = swf_GetSBits(t,nbits);
789 m->sy = swf_GetSBits(t,nbits);
791 else m->sx = m->sy = 0x10000;
793 if (swf_GetBits(t,1))
794 { nbits = swf_GetBits(t,5);
795 m->r0 = swf_GetSBits(t,nbits);
796 m->r1 = swf_GetSBits(t,nbits);
798 else m->r0 = m->r1 = 0x0;
800 nbits = swf_GetBits(t,5);
801 m->tx = swf_GetSBits(t,nbits);
802 m->ty = swf_GetSBits(t,nbits);
807 int swf_SetMatrix(TAG * t,MATRIX * m)
813 ma.sx = ma.sy = 0x10000;
818 swf_ResetWriteBits(t);
820 if ((m->sx==0x10000)&&(m->sy==0x10000)) swf_SetBits(t,0,1);
822 { swf_SetBits(t,1,1);
823 nbits = swf_CountBits(m->sx,0);
824 nbits = swf_CountBits(m->sy,nbits);
826 /* TODO: happens on AMD64 systems for normal values? */
827 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
830 swf_SetBits(t,nbits,5);
831 swf_SetBits(t,m->sx,nbits);
832 swf_SetBits(t,m->sy,nbits);
835 if ((!m->r0)&&(!m->r1)) swf_SetBits(t,0,1);
837 { swf_SetBits(t,1,1);
838 nbits = swf_CountBits(m->r0,0);
839 nbits = swf_CountBits(m->r1,nbits);
841 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
844 swf_SetBits(t,nbits,5);
845 swf_SetBits(t,m->r0,nbits);
846 swf_SetBits(t,m->r1,nbits);
849 nbits = swf_CountBits(m->tx,0);
850 nbits = swf_CountBits(m->ty,nbits);
852 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
855 swf_SetBits(t,nbits,5);
856 swf_SetBits(t,m->tx,nbits);
857 swf_SetBits(t,m->ty,nbits);
862 int swf_GetCXForm(TAG * t,CXFORM * cx,U8 alpha)
870 cx->a0 = cx->r0 = cx->g0 = cx->b0 = 256;
871 cx->a1 = cx->r1 = cx->g1 = cx->b1 = 0;
875 swf_ResetReadBits(t);
876 hasadd = swf_GetBits(t,1);
877 hasmul = swf_GetBits(t,1);
878 nbits = swf_GetBits(t,4);
881 { cx->r0 = (S16)swf_GetSBits(t,nbits);
882 cx->g0 = (S16)swf_GetSBits(t,nbits);
883 cx->b0 = (S16)swf_GetSBits(t,nbits);
885 cx->a0 = (S16)swf_GetSBits(t,nbits);
889 { cx->r1 = (S16)swf_GetSBits(t,nbits);
890 cx->g1 = (S16)swf_GetSBits(t,nbits);
891 cx->b1 = (S16)swf_GetSBits(t,nbits);
893 cx->a1 = (S16)swf_GetSBits(t,nbits);
899 int swf_SetCXForm(TAG * t,CXFORM * cx,U8 alpha)
907 cx->a0 = cx->r0 = cx->g0 = cx->b0 = 256;
908 cx->a1 = cx->r1 = cx->g1 = cx->b1 = 0;
918 hasmul = (cx->a0!=256)||(cx->r0!=256)||(cx->g0!=256)||(cx->b0!=256);
919 hasadd = cx->a1|cx->r1|cx->g1|cx->b1;
922 { if (alpha) nbits = swf_CountBits((S32)cx->a0,nbits);
923 nbits = swf_CountBits((S32)cx->r0,nbits);
924 nbits = swf_CountBits((S32)cx->g0,nbits);
925 nbits = swf_CountBits((S32)cx->b0,nbits);
929 { if (alpha) nbits = swf_CountBits((S32)cx->a1,nbits);
930 nbits = swf_CountBits((S32)cx->r1,nbits);
931 nbits = swf_CountBits((S32)cx->g1,nbits);
932 nbits = swf_CountBits((S32)cx->b1,nbits);
935 swf_ResetWriteBits(t);
936 swf_SetBits(t,hasadd?1:0,1);
937 swf_SetBits(t,hasmul?1:0,1);
938 swf_SetBits(t,nbits,4);
941 { swf_SetBits(t,cx->r0,nbits);
942 swf_SetBits(t,cx->g0,nbits);
943 swf_SetBits(t,cx->b0,nbits);
944 if (alpha) swf_SetBits(t,cx->a0,nbits);
948 { swf_SetBits(t,cx->r1,nbits);
949 swf_SetBits(t,cx->g1,nbits);
950 swf_SetBits(t,cx->b1,nbits);
951 if (alpha) swf_SetBits(t,cx->a1,nbits);
957 //int swf_GetPoint(TAG * t,SPOINT * p) { return 0; }
958 //int swf_SetPoint(TAG * t,SPOINT * p) { return 0; }
960 void swf_SetPassword(TAG * t, const char * password)
962 /* WARNING: crypt_md5 is not reentrant */
966 #if defined(HAVE_LRAND48) && defined(HAVE_SRAND48) && defined(HAVE_TIME_H) && defined(HAVE_TIME)
968 salt[0] = "abcdefghijklmnopqrstuvwxyz0123456789"[lrand48()%36];
969 salt[1] = "abcdefghijklmnopqrstuvwxyz0123456789"[lrand48()%36];
973 fprintf(stderr, "rfxswf: Warning- no usable random generator found\n");
974 fprintf(stderr, "Your password will be vulnerable to dictionary attacks\n");
978 md5string = crypt_md5(password, salt);
981 swf_SetString(t, md5string);
984 void swf_SetString(TAG*t, const char* s)
989 swf_SetBlock(t,(U8*)s,strlen(s)+1);
993 int swf_VerifyPassword(TAG * t, const char * password)
995 char*md5string1, *md5string2;
1000 if(t->len >= 5 && t->pos==0 &&
1005 printf("%d %d %d %d\n", t->len, t->pos, t->data[0], t->data[1]);
1008 md5string1 = swf_GetString(t);
1010 if(strncmp(md5string1, "$1$",3 )) {
1011 fprintf(stderr, "rfxswf: no salt in pw string\n");
1014 x = strchr(md5string1+3, '$');
1016 fprintf(stderr, "rfxswf: invalid salt format in pw string\n");
1019 n = x-(md5string1+3);
1020 salt = (char*)rfx_alloc(n+1);
1021 memcpy(salt, md5string1+3, n);
1024 md5string2 = crypt_md5(password, salt);
1026 if(strcmp(md5string1, md5string2) != 0)
1031 // Tag List Manipulating Functions
1033 TAG * swf_InsertTag(TAG * after,U16 id)
1036 t = (TAG *)rfx_calloc(sizeof(TAG));
1042 t->next = after->next;
1044 if (t->next) t->next->prev = t;
1049 TAG * swf_InsertTagBefore(SWF* swf, TAG * before,U16 id)
1052 t = (TAG *)rfx_calloc(sizeof(TAG));
1058 t->prev = before->prev;
1060 if (t->prev) t->prev->next = t;
1062 if(swf && swf->firstTag == before) {
1068 void swf_ClearTag(TAG * t)
1070 if (t->data) rfx_free(t->data);
1079 void swf_ResetTag(TAG*tag, U16 id)
1081 tag->len = tag->pos = tag->readBit = tag->writeBit = 0;
1085 TAG* swf_CopyTag(TAG*tag, TAG*to_copy)
1087 tag = swf_InsertTag(tag, to_copy->id);
1088 swf_SetBlock(tag, to_copy->data, to_copy->len);
1092 TAG* swf_DeleteTag(SWF*swf, TAG * t)
1096 if (swf && swf->firstTag==t)
1097 swf->firstTag = t->next;
1098 if (t->prev) t->prev->next = t->next;
1099 if (t->next) t->next->prev = t->prev;
1101 if (t->data) rfx_free(t->data);
1106 TAG * swf_ReadTag(reader_t*reader, TAG * prev)
1112 if (reader->read(reader, &raw, 2) !=2 ) return NULL;
1120 if (reader->read(reader, &len, 4) != 4) return NULL;
1124 if (id==ST_DEFINESPRITE) len = 2*sizeof(U16);
1125 // Sprite handling fix: Flatten sprite tree
1127 t = (TAG *)rfx_calloc(sizeof(TAG));
1133 { t->data = (U8*)rfx_alloc(t->len);
1134 t->memsize = t->len;
1135 if (reader->read(reader, t->data, t->len) != t->len) {
1136 fprintf(stderr, "rfxswf: Warning: Short read (tagid %d). File truncated?\n", t->id);
1137 free(t->data);t->data=0;
1152 int swf_DefineSprite_GetRealSize(TAG * t);
1154 int swf_WriteTag2(writer_t*writer, TAG * t)
1155 // returns tag length in bytes (incl. Header), -1 = Error
1156 // writer = 0 -> no output
1163 len = (t->id==ST_DEFINESPRITE)?swf_DefineSprite_GetRealSize(t):t->len;
1165 short_tag = len<0x3f&&
1166 (t->id!=ST_DEFINEBITSLOSSLESS&&t->id!=ST_DEFINEBITSLOSSLESS2&&t->id!=ST_SOUNDSTREAMBLOCK&&
1167 t->id!=ST_DEFINEBITSJPEG&&t->id!=ST_DEFINEBITSJPEG2&&t->id!=ST_DEFINEBITSJPEG3);
1172 int oldpos = writer->pos;
1176 { raw[0] = SWAP16(len|((t->id&0x3ff)<<6));
1177 if (writer->write(writer,raw,2)!=2)
1180 fprintf(stderr,"WriteTag() failed: Short Header.\n");
1187 raw[0] = SWAP16((t->id<<6)|0x3f);
1188 if (writer->write(writer,raw,2)!=2)
1191 fprintf(stderr,"WriteTag() failed: Long Header (1).\n");
1197 if (writer->write(writer,&len,4)!=4)
1200 fprintf(stderr,"WriteTag() failed: Long Header (2).\n");
1207 { if (writer->write(writer,t->data,t->len)!=t->len)
1210 fprintf(stderr,"WriteTag() failed: Data.\n");
1216 else if (t->len) fprintf(stderr,"WriteTag(): Tag Data Error, id=%i\n",t->id);
1220 writer->flush(writer);
1221 printf("TAG %s costs %d bytes\n", swf_TagGetName(t), writer->pos-oldpos);
1225 return t->len+(short_tag?2:6);
1228 int swf_WriteTag(int handle, TAG * t)
1233 return swf_WriteTag2(0, t);
1234 writer_init_filewriter(&writer, handle);
1235 len = swf_WriteTag2(&writer, t);
1236 writer.finish(&writer);
1240 int swf_DefineSprite_GetRealSize(TAG * t)
1241 // Sprite Handling: Helper function to pack DefineSprite-Tag
1243 if(len>4) { // folded sprite
1247 { t = swf_NextTag(t);
1248 if (t && t->id!=ST_DEFINESPRITE) len += swf_WriteTag(-1, t);
1250 } while (t&&(t->id!=ST_END));
1254 void swf_UnFoldSprite(TAG * t)
1259 U16 spriteid,spriteframes;
1261 if(t->id!=ST_DEFINESPRITE)
1263 if(t->len<=4) // not folded
1268 spriteid = swf_GetU16(t); //id
1269 spriteframes = swf_GetU16(t); //frames
1276 tmp = swf_GetU16(t);
1281 if(id == ST_DEFINESPRITE && len<=4)
1285 len = swf_GetU32(t);
1286 it = swf_InsertTag(next, id);
1291 { it->data = (U8*)rfx_alloc(it->len);
1292 it->memsize = it->len;
1293 swf_GetBlock(t, it->data, it->len);
1300 rfx_free(t->data); t->data = 0;
1301 t->memsize = t->len = t->pos = 0;
1303 swf_SetU16(t, spriteid);
1304 swf_SetU16(t, spriteframes);
1307 void swf_FoldSprite(TAG * t)
1312 if(t->id!=ST_DEFINESPRITE)
1315 fprintf(stderr, "Error: Sprite has no ID!");
1319 /* sprite is already folded */
1326 t->len = t->pos = t->memsize = 0;
1331 t = swf_NextTag(sprtag);
1336 if(t->id==ST_SHOWFRAME) frames++;
1337 if(t->id == ST_DEFINESPRITE && t->len<=4)
1342 } while(t && level);
1344 fprintf(stderr, "rfxswf error: sprite doesn't end(1)\n");
1346 swf_SetU16(sprtag, id);
1347 swf_SetU16(sprtag, frames);
1349 t = swf_NextTag(sprtag);
1355 (t->id!=ST_DEFINEBITSLOSSLESS&&t->id!=ST_DEFINEBITSLOSSLESS2&&t->id!=ST_SOUNDSTREAMBLOCK&&
1356 t->id!=ST_DEFINEBITSJPEG&&t->id!=ST_DEFINEBITSJPEG2&&t->id!=ST_DEFINEBITSJPEG3)
1358 swf_SetU16(sprtag,t->len|(t->id<<6));
1360 swf_SetU16(sprtag,0x3f|(t->id<<6));
1361 swf_SetU32(sprtag,t->len);
1364 swf_SetBlock(sprtag,t->data, t->len);
1366 if(t->id == ST_DEFINESPRITE && t->len<=4)
1371 swf_DeleteTag(0, tmp);
1375 fprintf(stderr, "rfxswf error: sprite doesn't end(2)\n");
1377 // sprtag->next = t;
1378 // t->prev = sprtag;
1381 int swf_IsFolded(TAG * t)
1383 return (t->id == ST_DEFINESPRITE && t->len>4);
1386 void swf_FoldAll(SWF*swf)
1388 TAG*tag = swf->firstTag;
1389 //swf_DumpSWF(stdout, swf);
1391 if(tag->id == ST_DEFINESPRITE) {
1392 swf_FoldSprite(tag);
1393 //swf_DumpSWF(stdout, swf);
1395 tag = swf_NextTag(tag);
1399 void swf_UnFoldAll(SWF*swf)
1401 TAG*tag = swf->firstTag;
1403 if(tag->id == ST_DEFINESPRITE)
1404 swf_UnFoldSprite(tag);
1409 void swf_OptimizeTagOrder(SWF*swf)
1416 /* at the moment, we don't actually do optimizing,
1417 only fixing of non-spec-conformant things like
1424 tag = swf->firstTag;
1427 if(tag->id == ST_DEFINESPRITE) {
1429 /* ??? all sprites are supposed to be unfolded */
1430 fprintf(stderr, "librfxswf error - internal error in OptimizeTagOrder/UnfoldAll\n");
1440 /* move non-sprite tags out of sprite */
1441 if(!swf_isAllowedSpriteTag(tag) || level>=2) {
1442 /* remove tag from current position */
1443 tag->prev->next = tag->next;
1445 tag->next->prev = tag->prev;
1447 /* insert before tag level0 */
1449 tag->prev = level0->prev;
1452 tag->prev->next = tag;
1454 swf->firstTag = tag;
1458 if(tag->id == ST_END) {
1469 int swf_ReadSWF2(reader_t*reader, SWF * swf) // Reads SWF to memory (malloc'ed), returns length or <0 if fails
1471 if (!swf) return -1;
1472 memset(swf,0x00,sizeof(SWF));
1474 { char b[32]; // read Header
1480 if ((len = reader->read(reader ,b,8))<8) return -1;
1482 if (b[0]!='F' && b[0]!='C') return -1;
1483 if (b[1]!='W') return -1;
1484 if (b[2]!='S') return -1;
1485 swf->fileVersion = b[3];
1486 swf->compressed = (b[0]=='C')?1:0;
1487 swf->fileSize = GET32(&b[4]);
1489 if(swf->compressed) {
1490 reader_init_zlibinflate(&zreader, reader);
1493 swf->compressed = 0; // derive from version number from now on
1495 reader_GetRect(reader, &swf->movieSize);
1496 reader->read(reader, &swf->frameRate, 2);
1497 swf->frameRate = SWAP16(swf->frameRate);
1498 reader->read(reader, &swf->frameCount, 2);
1499 swf->frameCount = SWAP16(swf->frameCount);
1501 /* read tags and connect to list */
1505 t = swf_ReadTag(reader,t);
1506 if(t && t->id == ST_FILEATTRIBUTES) {
1507 swf->fileAttributes = swf_GetU32(t);
1508 swf_ResetReadBits(t);
1511 swf->firstTag = t1.next;
1513 t1.next->prev = NULL;
1519 SWF* swf_OpenSWF(char*filename)
1521 int fi = open(filename, O_RDONLY|O_BINARY);
1523 fprintf(stderr, "Failed to open %s\n", filename);
1526 SWF* swf = rfx_alloc(sizeof(SWF));
1527 swf_ReadSWF(fi, swf);
1532 int swf_ReadSWF(int handle, SWF * swf)
1535 reader_init_filereader(&reader, handle);
1536 return swf_ReadSWF2(&reader, swf);
1539 void swf_ReadABCfile(char*filename, SWF*swf)
1541 memset(swf, 0, sizeof(SWF));
1543 swf->fileAttributes=FILEATTRIBUTE_AS3; //as3
1544 TAG*tag = swf->firstTag = swf_InsertTag(0, ST_RAWABC);
1545 memfile_t*file = memfile_open(filename);
1546 swf_SetBlock(tag, file->data, file->len);
1547 memfile_close(file);
1550 int no_extra_tags = 0;
1552 int WriteExtraTags(SWF*swf, writer_t*writer)
1554 TAG*t = swf->firstTag;
1555 TAG* has_fileattributes=0;
1556 int has_scenedescription=0;
1557 int has_version_8_action=0;
1558 int has_version_9_action=0;
1561 if(t->id == ST_FILEATTRIBUTES)
1562 has_fileattributes = t;
1563 if(t->id == ST_SCENEDESCRIPTION)
1564 has_scenedescription = 1;
1565 if(t->id == ST_DOABC)
1566 has_version_9_action=1;
1567 /* FIXME: this doesn't yet find actionscript in buttons */
1568 if(t->id == ST_DOACTION || t->id == ST_DOINITACTION)
1569 has_version_8_action=1;
1570 if(t->id == ST_PLACEOBJECT2 && t->len && (t->data[0]&0x80))
1571 has_version_8_action=1;
1574 if(has_version_8_action && has_version_9_action) {
1575 fprintf(stderr, "Warning: File contains both flash 8 and flash 9 actionscript\n");
1578 if(swf->fileVersion >= 9) {
1579 if(!has_fileattributes) {
1580 U32 flags = swf->fileAttributes|FILEATTRIBUTE_AS3; // 16 = has symbolclass tag | 8 = actionscript3 | 1 = usenetwork
1581 if(has_version_8_action && !has_version_9_action)
1582 flags &= ~FILEATTRIBUTE_AS3;
1583 TAG*fileattrib = swf_InsertTag(0, ST_FILEATTRIBUTES);
1584 swf_SetU32(fileattrib, flags);
1586 if(swf_WriteTag2(writer, fileattrib)<0)
1589 len += swf_WriteTag(-1,fileattrib);
1591 swf_DeleteTag(0, fileattrib);
1593 if(swf->fileAttributes) {
1594 /* if we're writing a file out again where we might have possible
1595 modified the fileattributes in the header, adjust the tag data */
1596 TAG*tt = swf_CopyTag(0,has_fileattributes);
1597 U32 flags = swf_GetU32(tt) | swf->fileAttributes;
1598 swf_ResetTag(tt, tt->id);
1599 swf_SetU32(tt, flags);
1600 if(swf_WriteTag2(writer, has_fileattributes)<0) return -1;
1601 swf_DeleteTag(0, tt);
1603 if(swf_WriteTag2(writer, has_fileattributes)<0)
1607 if(0 && !has_scenedescription) {
1608 TAG*scene = swf_InsertTag(0, ST_SCENEDESCRIPTION);
1609 swf_SetU16(scene, 1);
1610 swf_SetString(scene, "Scene 1");
1611 swf_SetU8(scene, 0);
1613 if(swf_WriteTag2(writer, scene)<0)
1616 len += swf_WriteTag(-1,scene);
1618 swf_DeleteTag(0, scene);
1624 int swf_WriteSWF2(writer_t*writer, SWF * swf) // Writes SWF to file, returns length or <0 if fails
1632 writer_t*original_writer = writer;
1633 int writer_lastpos = 0;
1635 if (!swf) return -1;
1636 if (!writer) return -1; // the caller should provide a nullwriter, not 0, for querying SWF size
1638 if(original_writer) writer_lastpos = original_writer->pos;
1640 // Count Frames + File Size
1646 if(swf->firstTag && !no_extra_tags) {
1647 len += WriteExtraTags(swf, 0);
1650 len += swf_WriteTag(-1,t);
1651 if(t->id == ST_DEFINESPRITE && !swf_IsFolded(t)) inSprite++;
1652 else if(t->id == ST_END && inSprite) inSprite--;
1653 else if(t->id == ST_END && !inSprite) {
1654 if(t->prev && t->prev->id!=ST_SHOWFRAME)
1657 else if(t->id == ST_SHOWFRAME && !inSprite) frameCount++;
1665 memset(&t1,0x00,sizeof(TAG));
1669 { // measure header file size
1672 memset(&t2,0x00,sizeof(TAG));
1675 swf_SetRect(&t2, &swf->movieSize);
1676 swf_SetU16(&t2, swf->frameRate);
1677 swf_SetU16(&t2, swf->frameCount);
1678 l = swf_GetTagLen(&t2)+8;
1680 if(swf->compressed == 8) {
1685 if(len) {// don't touch headers without tags
1686 swf->fileSize = fileSize;
1687 swf->frameCount = frameCount;
1690 if(swf->compressed != 8) {
1691 /* compressed flag set to 8 means "skip first 8
1692 header bytes". This is necessary if the caller wants to
1693 create compressed SWFs himself .
1694 It also means that we don't initialize our own zlib
1695 writer, but assume the caller provided one.
1697 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6)) {
1699 writer->write(writer, id, 3);
1702 writer->write(writer, id, 3);
1705 writer->write(writer, &swf->fileVersion, 1);
1706 PUT32(b4, swf->fileSize);
1707 writer->write(writer, b4, 4);
1709 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6)) {
1710 writer_init_zlibdeflate(&zwriter, writer);
1715 swf_SetRect(&t1,&swf->movieSize);
1716 swf_SetU16(&t1,swf->frameRate);
1717 swf_SetU16(&t1,swf->frameCount);
1719 ret = writer->write(writer,b,swf_GetTagLen(&t1));
1720 if (ret!=swf_GetTagLen(&t1))
1723 fprintf(stderr, "ret:%d\n",ret);
1725 fprintf(stderr,"WriteSWF() failed: Header.\n");
1730 if(swf->firstTag && !no_extra_tags) {
1731 WriteExtraTags(swf, writer);
1736 if(no_extra_tags || t->id != ST_FILEATTRIBUTES) {
1737 if(swf_WriteTag2(writer, t)<0)
1742 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6) || swf->compressed==8) {
1743 if(swf->compressed != 8) {
1744 zwriter.finish(&zwriter);
1745 return original_writer->pos - writer_lastpos;
1747 return (int)fileSize;
1749 return (int)fileSize;
1754 int swf_SaveSWF(SWF * swf, char*filename)
1756 int fi = open(filename, O_BINARY|O_RDWR|O_TRUNC|O_CREAT, 0777);
1761 if(swf_WriteSWF(fi, swf)<0) {
1762 fprintf(stderr, "Unable to write output file: %s\n", filename);
1769 int swf_WriteSWF(int handle, SWF * swf) // Writes SWF to file, returns length or <0 if fails
1775 writer_init_nullwriter(&writer);
1776 len = swf_WriteSWF2(&writer, swf);
1779 writer_init_filewriter(&writer, handle);
1780 len = swf_WriteSWF2(&writer, swf);
1781 writer.finish(&writer);
1785 int swf_WriteHeader2(writer_t*writer,SWF * swf)
1788 memcpy(&myswf,swf,sizeof(SWF));
1790 return swf_WriteSWF2(writer, &myswf);
1793 int swf_WriteHeader(int handle,SWF * swf)
1796 memcpy(&myswf,swf,sizeof(SWF));
1798 return swf_WriteSWF(handle, &myswf);
1801 int swf_WriteCGI(SWF * swf)
1805 len = swf_WriteSWF(-1,swf);
1807 if (len<0) return -1;
1809 sprintf(s,"Content-type: application/x-shockwave-flash\n"
1810 "Accept-Ranges: bytes\n"
1811 "Content-Length: %lu\n"
1812 "Expires: Thu, 13 Apr 2000 23:59:59 GMT\n"
1815 write(fileno(stdout),s,strlen(s));
1816 return swf_WriteSWF(fileno(stdout),swf);
1819 SWF* swf_CopySWF(SWF*swf)
1821 SWF*nswf = (SWF*)rfx_alloc(sizeof(SWF));
1823 memcpy(nswf, swf, sizeof(SWF));
1825 tag = swf->firstTag;
1828 ntag = swf_CopyTag(ntag, tag);
1830 nswf->firstTag = ntag;
1836 void swf_FreeTags(SWF * swf) // Frees all malloc'ed memory for tags
1837 { TAG * t = swf->firstTag;
1840 { TAG * tnew = t->next;
1841 if (t->data) rfx_free(t->data);
1848 // include advanced functions
1850 //#include "modules/swfdump.c"
1851 //#include "modules/swfshape.c"
1852 //#include "modules/swftext.c"
1853 //#include "modules/swffont.c"
1854 //#include "modules/swfobject.c"
1855 //#include "modules/swfbutton.c"
1856 //#include "modules/swftools.c"
1857 //#include "modules/swfcgi.c"
1858 //#include "modules/swfbits.c"
1859 //#include "modules/swfaction.c"
1860 //#include "modules/swfabc.c"
1861 //#include "modules/swfsound.c"
1862 //#include "modules/swfdraw.c"
1863 //#include "modules/swfrender.c"
1864 //#include "modules/swffilter.c"