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);
96 if ((int)t->pos>=(int)t->len)
97 { fprintf(stderr,"GetU8() out of bounds: TagID = %i\n",t->id);
102 return t->data[t->pos++];
105 U16 swf_GetU16(TAG * t)
107 swf_ResetReadBits(t);
109 if ((int)t->pos>((int)t->len-2))
110 { fprintf(stderr,"GetU16() out of bounds: TagID = %i\n",t->id);
114 res = t->data[t->pos] | (t->data[t->pos+1]<<8);
119 U32 swf_GetU32(TAG * t)
121 swf_ResetReadBits(t);
123 if ((int)t->pos>((int)t->len-4))
124 { fprintf(stderr,"GetU32() out of bounds: TagID = %i\n",t->id);
128 res = t->data[t->pos] | (t->data[t->pos+1]<<8) |
129 (t->data[t->pos+2]<<16) | (t->data[t->pos+3]<<24);
134 int swf_GetBlock(TAG * t,U8 * b,int l)
135 // returns number of bytes written (<=l)
136 // b = NULL -> skip data
137 { swf_ResetReadBits(t);
138 if ((t->len-t->pos)<l) l=t->len-t->pos;
139 if (b && l) memcpy(b,&t->data[t->pos],l);
144 int swf_SetBlock(TAG * t,const U8 * b,int l)
145 // Appends Block to the end of Tagdata, returns size
146 { U32 newlen = t->len + l;
147 swf_ResetWriteBits(t);
148 if (newlen>t->memsize)
149 { U32 newmem = MEMSIZE(newlen);
150 U8 * newdata = (U8*)(rfx_realloc(t->data,newmem));
154 if (b) memcpy(&t->data[t->len],b,l);
155 else memset(&t->data[t->len],0x00,l);
160 int swf_SetU8(TAG * t,U8 v)
161 { swf_ResetWriteBits(t);
162 if ((t->len+1)>t->memsize) return (swf_SetBlock(t,&v,1)==1)?0:-1;
163 t->data[t->len++] = v;
167 int swf_SetU16(TAG * t,U16 v)
172 swf_ResetWriteBits(t);
173 if ((t->len+2)>t->memsize) return (swf_SetBlock(t,a,2)==2)?0:-1;
174 t->data[t->len++] = a[0];
175 t->data[t->len++] = a[1];
178 void swf_SetS16(TAG * t,int v)
180 if(v>32767 || v<-32768) {
182 fprintf(stderr, "Warning: S16 overflow: %d\n", v);
185 swf_SetU16(t, (S16)v);
188 int swf_SetU32(TAG * t,U32 v)
190 a[0] = v&0xff; // to ensure correct handling of non-intel byteorder
195 swf_ResetWriteBits(t);
196 if ((t->len+4)>t->memsize) return (swf_SetBlock(t,a,4)==4)?0:-1;
197 t->data[t->len++] = a[0];
198 t->data[t->len++] = a[1];
199 t->data[t->len++] = a[2];
200 t->data[t->len++] = a[3];
204 U32 swf_GetBits(TAG * t,int nbits)
206 if (!nbits) return 0;
207 if (!t->readBit) t->readBit = 0x80;
212 { fprintf(stderr,"GetBits() out of bounds: TagID = %i, pos=%d, len=%d\n",t->id, t->pos, t->len);
213 int i,m=t->len>10?10:t->len;
215 fprintf(stderr, "(%d)%02x ", i, t->data[i]);
217 fprintf(stderr, "\n");
221 if (t->data[t->pos]&t->readBit) res|=1;
225 { if (nbits) t->readBit = 0x80;
232 S32 swf_GetSBits(TAG * t,int nbits)
233 { U32 res = swf_GetBits(t,nbits);
234 if (res&(1<<(nbits-1))) res|=(0xffffffff<<nbits);
238 U32 reader_GetBits(reader_t*reader, int nbits)
239 { return reader_readbits(reader, nbits);
241 S32 reader_GetSBits(reader_t*reader, int nbits)
242 { U32 res = reader_readbits(reader, nbits);
243 if (res&(1<<(nbits-1))) res|=(0xffffffff<<nbits);
247 int swf_SetBits(TAG * t,U32 v,int nbits)
248 { U32 bm = 1<<(nbits-1);
252 { if (FAILED(swf_SetU8(t,0))) return -1;
255 if (v&bm) t->data[t->len-1] |= t->writeBit;
263 // Advanced Data Access Functions
265 double swf_GetFixed(TAG * t)
267 U16 low = swf_GetU16(t);
268 U16 high = swf_GetU16(t);
269 return high + low*(1/65536.0);
271 void swf_SetFixed(TAG * t, double f)
273 U16 fr = (U16)((f-(int)f)*65536);
275 swf_SetU16(t, (U16)f - (f<0 && fr!=0));
277 float swf_GetFixed8(TAG * t)
279 U8 low = swf_GetU8(t);
280 U8 high = swf_GetU8(t);
281 return (float)(high + low*(1/256.0));
283 void swf_SetFixed8(TAG * t, float f)
285 U8 fr = (U8)((f-(int)f)*256);
287 swf_SetU8(t, (U8)f - (f<0 && fr!=0));
290 U32 swf_GetU30(TAG*tag)
296 U8 b = swf_GetU8(tag);
300 if(!(b&128) || shift>=32)
303 /*int nr2= swf_SetU30(0, s);
305 printf("Unsigned value %d stored in %d bytes, I'd store it in %d bytes\n", s, nr, nr2);
310 int swf_SetU30(TAG*tag, U32 u)
315 swf_SetU8(tag, (u&~0x7f?0x80:0) | (u&0x7F));
322 void swf_SetABCU32(TAG*tag, U32 u)
325 swf_SetU8(tag, (u&~0x7f?0x80:0) | (u&0x7F));
329 U32 swf_GetABCU32(TAG*tag)
331 return swf_GetU30(tag);
333 void swf_SetABCS32(TAG*tag, S32 v)
335 swf_SetABCU32(tag, v);
337 S32 swf_GetABCS32(TAG*tag)
339 return swf_GetABCU32(tag);
344 /*The AVM2 spec is just plain wrong, claiming that S32 values are sign
345 extended. They're not.
346 This wastes up to 4 bytes for every negative value. */
348 void swf_SetABCS32(TAG*tag, S32 s)
350 printf("write S32: %d\n", s);
352 U8 sign = s<0?0x40:0;
358 if(s==neg && vsign==sign) {
359 /* if the value we now write has the same sign as s
360 and all the remaining bits are equal to the sign of s
363 printf("put %02x\n", val);
366 swf_SetU8(tag, 0x80 | val);
367 printf("put %02x\n", 0x80|val);
371 int swf_GetS30(TAG*tag)
377 U8 b = swf_GetU8(tag);
379 nt i,m=t->len>10?10:t->len;
381 fprintf(stderr, "%02x ", t->data[i]);
383 fprintf(stderr, "\n");
386 if(!(b&128) || shift>=32) {
389 s|=0xffffffff<<shift;
394 /* It's not uncommon for other applications (Flex for all negative numbers, and
395 Flash for -1) to generate a lot more bytes than would be necessary.
396 int nr2= swf_SetS30(0, s);
398 printf("Signed value %d stored in %d bytes, I'd store it in %d bytes\n", s, nr, nr2);
404 int swf_SetU30String(TAG*tag, const char*str, int l)
407 len+=swf_SetU30(tag, l);
409 swf_SetBlock(tag, (void*)str, l);
413 float swf_GetF16(TAG * t)
415 U16 f1 = swf_GetU16(t);
416 if(!(f1&0x3ff)) return 0.0;
420 /* gcc 4.1.2 seems to require a union here. *(float*)u doesn't work */
426 U16 e = (f1>>10)&0x1f;
428 /* find highest bit in mantissa */
438 f2.u = (f1&0x8000)<<16; //sign
439 f2.u |= e<<23; //exponent
440 f2.u |= m<<13; //mantissa
444 void swf_SetF16(TAG * t, float f)
452 U16 result = (v.u>>16)&0x8000; //sign
453 int exp = ((v.u>>23)&0xff)-0x7f+0x10;
454 U16 m = (v.u>>13)&0x3ff;
455 //fprintf(stderr, "%f: %04x sign, %d exp, %04x mantissa\n", f, result, exp, m);
457 // underflow (clamp to 0.0)
461 // partial underflow- strip some bits
467 fprintf(stderr, "Exponent overflow in FLOAT16 encoding\n");
474 swf_SetU16(t, result);
477 double swf_GetD64(TAG*tag)
479 /* FIXME: this is not big-endian compatible */
480 double value = *(double*)&tag->data[tag->pos];
485 int swf_SetD64(TAG*tag, double v)
487 /* FIXME: this is not big-endian compatible */
488 swf_SetU32(tag, ((U32*)&v)[0]);
489 swf_SetU32(tag, ((U32*)&v)[1]);
492 int swf_GetU24(TAG*tag)
494 int b1 = swf_GetU8(tag);
495 int b2 = swf_GetU8(tag);
496 int b3 = swf_GetU8(tag);
497 return b3<<16|b2<<8|b1;
499 int swf_GetS24(TAG*tag)
501 int b1 = swf_GetU8(tag);
502 int b2 = swf_GetU8(tag);
503 int b3 = swf_GetU8(tag);
505 return -1-((b3<<16|b2<<8|b1)^0xffffff);
507 return b3<<16|b2<<8|b1;
510 int swf_SetU24(TAG*tag, U32 v)
514 fprintf(stderr, "Error: Overflow in swf_SetU24()\n");
516 swf_SetU8(tag, v>>8);
517 swf_SetU8(tag, v>>16);
521 int swf_SetS24(TAG*tag, U32 v)
525 return swf_SetU24(tag, v);
526 if((v&0xff000000)!=0xff000000) {
527 fprintf(stderr, "Error: Overflow in swf_SetS24()\n");
530 swf_SetU8(tag, v>>8);
531 swf_SetU8(tag, v>>16);
537 int swf_SetRGB(TAG * t,RGBA * col)
540 { swf_SetU8(t,col->r);
543 } else swf_SetBlock(t,NULL,3);
546 void swf_GetRGB(TAG * t, RGBA * col)
551 col->r = swf_GetU8(t);
552 col->g = swf_GetU8(t);
553 col->b = swf_GetU8(t);
557 int swf_SetRGBA(TAG * t,RGBA * col)
560 { swf_SetU8(t,col->r);
564 } else swf_SetBlock(t,NULL,4);
567 void swf_GetRGBA(TAG * t, RGBA * col)
572 col->r = swf_GetU8(t);
573 col->g = swf_GetU8(t);
574 col->b = swf_GetU8(t);
575 col->a = swf_GetU8(t);
578 void swf_GetGradient(TAG * tag, GRADIENT * gradient, char alpha)
582 memset(gradient, 0, sizeof(GRADIENT));
585 U8 num = swf_GetU8(tag) & 15;
588 gradient->rgba = (RGBA*)rfx_calloc(sizeof(RGBA)*gradient->num);
589 gradient->ratios = (U8*)rfx_calloc(sizeof(gradient->ratios[0])*gradient->num);
593 U8 ratio = swf_GetU8(tag);
596 swf_GetRGB(tag, &color);
598 swf_GetRGBA(tag, &color);
600 gradient->ratios[t] = ratio;
601 gradient->rgba[t] = color;
606 void swf_SetGradient(TAG * tag, GRADIENT * gradient, char alpha)
610 memset(gradient, 0, sizeof(GRADIENT));
613 swf_SetU8(tag, gradient->num);
614 for(t=0; t<8 && t<gradient->num; t++)
616 swf_SetU8(tag, gradient->ratios[t]);
618 swf_SetRGB(tag, &gradient->rgba[t]);
620 swf_SetRGBA(tag, &gradient->rgba[t]);
624 void swf_FreeGradient(GRADIENT* gradient)
627 rfx_free(gradient->ratios);
629 rfx_free(gradient->rgba);
630 memset(gradient, 0, sizeof(GRADIENT));
633 int swf_CountUBits(U32 v,int nbits)
636 if(v == 0x00000000) n = 0;
642 return (n>nbits)?n:nbits;
645 int swf_CountBits(U32 v,int nbits)
649 { if(v == 0xffffffff) n = 1;
657 { if(v == 0x00000000) n = 0;
664 return (n>nbits)?n:nbits;
667 int swf_GetRect(TAG * t,SRECT * r)
670 if(!t) {r->xmin=r->xmax=r->ymin=r->ymax=0;return 0;}
672 nbits = (int) swf_GetBits(t,5);
673 r->xmin = swf_GetSBits(t,nbits);
674 r->xmax = swf_GetSBits(t,nbits);
675 r->ymin = swf_GetSBits(t,nbits);
676 r->ymax = swf_GetSBits(t,nbits);
680 int reader_GetRect(reader_t*reader,SRECT * r)
684 nbits = (int) reader_GetBits(reader,5);
685 r->xmin = reader_GetSBits(reader,nbits);
686 r->xmax = reader_GetSBits(reader,nbits);
687 r->ymin = reader_GetSBits(reader,nbits);
688 r->ymax = reader_GetSBits(reader,nbits);
692 int swf_SetRect(TAG * t,SRECT * r)
695 nbits = swf_CountBits(r->xmin,0);
696 nbits = swf_CountBits(r->xmax,nbits);
697 nbits = swf_CountBits(r->ymin,nbits);
698 nbits = swf_CountBits(r->ymax,nbits);
701 fprintf(stderr, "rfxswf: Warning: num_bits overflow in swf_SetRect\n");
706 swf_SetBits(t,nbits,5);
707 swf_SetBits(t,r->xmin,nbits);
708 swf_SetBits(t,r->xmax,nbits);
709 swf_SetBits(t,r->ymin,nbits);
710 swf_SetBits(t,r->ymax,nbits);
715 SRECT swf_ClipRect(SRECT border, SRECT r)
717 if(r.xmax > border.xmax) r.xmax = border.xmax;
718 if(r.ymax > border.ymax) r.ymax = border.ymax;
719 if(r.xmax < border.xmin) r.xmax = border.xmin;
720 if(r.ymax < border.ymin) r.ymax = border.ymin;
722 if(r.xmin > border.xmax) r.xmin = border.xmax;
723 if(r.ymin > border.ymax) r.ymin = border.ymax;
724 if(r.xmin < border.xmin) r.xmin = border.xmin;
725 if(r.ymin < border.ymin) r.ymin = border.ymin;
729 void swf_ExpandRect(SRECT*src, SPOINT add)
731 if((src->xmin | src->ymin | src->xmax | src->ymax)==0) {
736 if((add.x|add.y) == 0) src->xmax++; //make sure the bbox is not NULL anymore
739 if(add.x < src->xmin)
741 if(add.x > src->xmax)
743 if(add.y < src->ymin)
745 if(add.y > src->ymax)
748 void swf_ExpandRect2(SRECT*src, SRECT*add)
750 if((add->xmin | add->ymin | add->xmax | add->ymax)==0)
752 if((src->xmin | src->ymin | src->xmax | src->ymax)==0)
754 if(add->xmin < src->xmin)
755 src->xmin = add->xmin;
756 if(add->ymin < src->ymin)
757 src->ymin = add->ymin;
758 if(add->xmax > src->xmax)
759 src->xmax = add->xmax;
760 if(add->ymax > src->ymax)
761 src->ymax = add->ymax;
763 void swf_ExpandRect3(SRECT*src, SPOINT center, int radius)
765 if((src->xmin | src->ymin | src->xmax | src->ymax)==0) {
766 src->xmin = center.x-radius;
767 src->ymin = center.y-radius;
768 src->xmax = center.x+radius;
769 src->ymax = center.y+radius;
770 if((center.x|center.y|radius) == 0) src->xmax++; //make sure the bbox is not NULL anymore
773 if(center.x - radius < src->xmin)
774 src->xmin = center.x - radius;
775 if(center.x + radius > src->xmax)
776 src->xmax = center.x + radius;
777 if(center.y - radius < src->ymin)
778 src->ymin = center.y - radius;
779 if(center.y + radius > src->ymax)
780 src->ymax = center.y + radius;
782 SPOINT swf_TurnPoint(SPOINT p, MATRIX* m)
785 r.x = (int)(m->sx*(1/65536.0)*p.x + m->r1*(1/65536.0)*p.y + 0.5) + m->tx;
786 r.y = (int)(m->r0*(1/65536.0)*p.x + m->sy*(1/65536.0)*p.y + 0.5) + m->ty;
789 SRECT swf_TurnRect(SRECT r, MATRIX* m)
792 SPOINT p1,p2,p3,p4,pp1,pp2,pp3,pp4;
795 p1.x = r.xmin;p1.y = r.ymin;
796 p2.x = r.xmax;p2.y = r.ymin;
797 p3.x = r.xmin;p3.y = r.ymax;
798 p4.x = r.xmax;p4.y = r.ymax;
799 pp1 = swf_TurnPoint(p1, m);
800 pp2 = swf_TurnPoint(p2, m);
801 pp3 = swf_TurnPoint(p3, m);
802 pp4 = swf_TurnPoint(p4, m);
803 g.xmin = g.xmax = pp1.x;
804 g.ymin = g.ymax = pp1.y;
805 swf_ExpandRect(&g, pp2);
806 swf_ExpandRect(&g, pp3);
807 swf_ExpandRect(&g, pp4);
812 int swf_GetMatrix(TAG * t,MATRIX * m)
819 { m->sx = m->sy = 0x10000;
825 swf_ResetReadBits(t);
827 if (swf_GetBits(t,1))
828 { nbits = swf_GetBits(t,5);
829 m->sx = swf_GetSBits(t,nbits);
830 m->sy = swf_GetSBits(t,nbits);
832 else m->sx = m->sy = 0x10000;
834 if (swf_GetBits(t,1))
835 { nbits = swf_GetBits(t,5);
836 m->r0 = swf_GetSBits(t,nbits);
837 m->r1 = swf_GetSBits(t,nbits);
839 else m->r0 = m->r1 = 0x0;
841 nbits = swf_GetBits(t,5);
842 m->tx = swf_GetSBits(t,nbits);
843 m->ty = swf_GetSBits(t,nbits);
848 int swf_SetMatrix(TAG * t,MATRIX * m)
854 ma.sx = ma.sy = 0x10000;
859 swf_ResetWriteBits(t);
861 if ((m->sx==0x10000)&&(m->sy==0x10000)) swf_SetBits(t,0,1);
863 { swf_SetBits(t,1,1);
864 nbits = swf_CountBits(m->sx,0);
865 nbits = swf_CountBits(m->sy,nbits);
867 /* TODO: happens on AMD64 systems for normal values? */
869 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
873 swf_SetBits(t,nbits,5);
874 swf_SetBits(t,m->sx,nbits);
875 swf_SetBits(t,m->sy,nbits);
878 if ((!m->r0)&&(!m->r1)) swf_SetBits(t,0,1);
880 { swf_SetBits(t,1,1);
881 nbits = swf_CountBits(m->r0,0);
882 nbits = swf_CountBits(m->r1,nbits);
885 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
889 swf_SetBits(t,nbits,5);
890 swf_SetBits(t,m->r0,nbits);
891 swf_SetBits(t,m->r1,nbits);
894 nbits = swf_CountBits(m->tx,0);
895 nbits = swf_CountBits(m->ty,nbits);
898 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
902 swf_SetBits(t,nbits,5);
903 swf_SetBits(t,m->tx,nbits);
904 swf_SetBits(t,m->ty,nbits);
909 int swf_GetCXForm(TAG * t,CXFORM * cx,U8 alpha)
917 cx->a0 = cx->r0 = cx->g0 = cx->b0 = 256;
918 cx->a1 = cx->r1 = cx->g1 = cx->b1 = 0;
922 swf_ResetReadBits(t);
923 hasadd = swf_GetBits(t,1);
924 hasmul = swf_GetBits(t,1);
925 nbits = swf_GetBits(t,4);
928 { cx->r0 = (S16)swf_GetSBits(t,nbits);
929 cx->g0 = (S16)swf_GetSBits(t,nbits);
930 cx->b0 = (S16)swf_GetSBits(t,nbits);
932 cx->a0 = (S16)swf_GetSBits(t,nbits);
936 { cx->r1 = (S16)swf_GetSBits(t,nbits);
937 cx->g1 = (S16)swf_GetSBits(t,nbits);
938 cx->b1 = (S16)swf_GetSBits(t,nbits);
940 cx->a1 = (S16)swf_GetSBits(t,nbits);
946 int swf_SetCXForm(TAG * t,CXFORM * cx,U8 alpha)
954 cx->a0 = cx->r0 = cx->g0 = cx->b0 = 256;
955 cx->a1 = cx->r1 = cx->g1 = cx->b1 = 0;
965 hasmul = (cx->a0!=256)||(cx->r0!=256)||(cx->g0!=256)||(cx->b0!=256);
966 hasadd = cx->a1|cx->r1|cx->g1|cx->b1;
969 { if (alpha) nbits = swf_CountBits((S32)cx->a0,nbits);
970 nbits = swf_CountBits((S32)cx->r0,nbits);
971 nbits = swf_CountBits((S32)cx->g0,nbits);
972 nbits = swf_CountBits((S32)cx->b0,nbits);
976 { if (alpha) nbits = swf_CountBits((S32)cx->a1,nbits);
977 nbits = swf_CountBits((S32)cx->r1,nbits);
978 nbits = swf_CountBits((S32)cx->g1,nbits);
979 nbits = swf_CountBits((S32)cx->b1,nbits);
982 swf_ResetWriteBits(t);
983 swf_SetBits(t,hasadd?1:0,1);
984 swf_SetBits(t,hasmul?1:0,1);
985 swf_SetBits(t,nbits,4);
988 { swf_SetBits(t,cx->r0,nbits);
989 swf_SetBits(t,cx->g0,nbits);
990 swf_SetBits(t,cx->b0,nbits);
991 if (alpha) swf_SetBits(t,cx->a0,nbits);
995 { swf_SetBits(t,cx->r1,nbits);
996 swf_SetBits(t,cx->g1,nbits);
997 swf_SetBits(t,cx->b1,nbits);
998 if (alpha) swf_SetBits(t,cx->a1,nbits);
1004 //int swf_GetPoint(TAG * t,SPOINT * p) { return 0; }
1005 //int swf_SetPoint(TAG * t,SPOINT * p) { return 0; }
1007 void swf_SetPassword(TAG * t, const char * password)
1009 /* WARNING: crypt_md5 is not reentrant */
1013 #if defined(HAVE_LRAND48) && defined(HAVE_SRAND48) && defined(HAVE_TIME_H) && defined(HAVE_TIME)
1015 salt[0] = "abcdefghijklmnopqrstuvwxyz0123456789"[lrand48()%36];
1016 salt[1] = "abcdefghijklmnopqrstuvwxyz0123456789"[lrand48()%36];
1020 fprintf(stderr, "rfxswf: Warning- no usable random generator found\n");
1021 fprintf(stderr, "Your password will be vulnerable to dictionary attacks\n");
1025 md5string = crypt_md5(password, salt);
1028 swf_SetString(t, md5string);
1031 void swf_SetString(TAG*t, const char* s)
1036 swf_SetBlock(t,(U8*)s,strlen(s)+1);
1040 int swf_VerifyPassword(TAG * t, const char * password)
1042 char*md5string1, *md5string2;
1047 if(t->len >= 5 && t->pos==0 &&
1052 printf("%d %d %d %d\n", t->len, t->pos, t->data[0], t->data[1]);
1055 md5string1 = swf_GetString(t);
1057 if(strncmp(md5string1, "$1$",3 )) {
1058 fprintf(stderr, "rfxswf: no salt in pw string\n");
1061 x = strchr(md5string1+3, '$');
1063 fprintf(stderr, "rfxswf: invalid salt format in pw string\n");
1066 n = x-(md5string1+3);
1067 salt = (char*)rfx_alloc(n+1);
1068 memcpy(salt, md5string1+3, n);
1071 md5string2 = crypt_md5(password, salt);
1073 if(strcmp(md5string1, md5string2) != 0)
1078 // Tag List Manipulating Functions
1080 TAG * swf_InsertTag(TAG * after,U16 id)
1083 t = (TAG *)rfx_calloc(sizeof(TAG));
1089 t->next = after->next;
1091 if (t->next) t->next->prev = t;
1096 TAG * swf_InsertTagBefore(SWF* swf, TAG * before,U16 id)
1099 t = (TAG *)rfx_calloc(sizeof(TAG));
1105 t->prev = before->prev;
1107 if (t->prev) t->prev->next = t;
1109 if(swf && swf->firstTag == before) {
1115 void swf_ClearTag(TAG * t)
1117 if (t->data) rfx_free(t->data);
1126 void swf_ResetTag(TAG*tag, U16 id)
1128 tag->len = tag->pos = tag->readBit = tag->writeBit = 0;
1132 TAG* swf_CopyTag(TAG*tag, TAG*to_copy)
1134 tag = swf_InsertTag(tag, to_copy->id);
1135 swf_SetBlock(tag, to_copy->data, to_copy->len);
1139 TAG* swf_DeleteTag(SWF*swf, TAG * t)
1143 if (swf && swf->firstTag==t)
1144 swf->firstTag = t->next;
1145 if (t->prev) t->prev->next = t->next;
1146 if (t->next) t->next->prev = t->prev;
1148 if (t->data) rfx_free(t->data);
1153 TAG * swf_ReadTag(reader_t*reader, TAG * prev)
1159 if (reader->read(reader, &raw, 2) !=2 ) return NULL;
1167 if (reader->read(reader, &len, 4) != 4) return NULL;
1171 if (id==ST_DEFINESPRITE) len = 2*sizeof(U16);
1172 // Sprite handling fix: Flatten sprite tree
1174 t = (TAG *)rfx_calloc(sizeof(TAG));
1180 { t->data = (U8*)rfx_alloc(t->len);
1181 t->memsize = t->len;
1182 if (reader->read(reader, t->data, t->len) != t->len) {
1184 fprintf(stderr, "rfxswf: Warning: Short read (tagid %d). File truncated?\n", t->id);
1186 free(t->data);t->data=0;
1201 int swf_DefineSprite_GetRealSize(TAG * t);
1203 int swf_WriteTag2(writer_t*writer, TAG * t)
1204 // returns tag length in bytes (incl. Header), -1 = Error
1205 // writer = 0 -> no output
1212 len = (t->id==ST_DEFINESPRITE)?swf_DefineSprite_GetRealSize(t):t->len;
1214 short_tag = len<0x3f&&
1215 (t->id!=ST_DEFINEBITSLOSSLESS&&t->id!=ST_DEFINEBITSLOSSLESS2&&t->id!=ST_SOUNDSTREAMBLOCK&&
1216 t->id!=ST_DEFINEBITSJPEG&&t->id!=ST_DEFINEBITSJPEG2&&t->id!=ST_DEFINEBITSJPEG3);
1221 int oldpos = writer->pos;
1225 { raw[0] = SWAP16(len|((t->id&0x3ff)<<6));
1226 if (writer->write(writer,raw,2)!=2)
1229 fprintf(stderr,"WriteTag() failed: Short Header.\n");
1236 raw[0] = SWAP16((t->id<<6)|0x3f);
1237 if (writer->write(writer,raw,2)!=2)
1240 fprintf(stderr,"WriteTag() failed: Long Header (1).\n");
1246 if (writer->write(writer,&len,4)!=4)
1249 fprintf(stderr,"WriteTag() failed: Long Header (2).\n");
1256 { if (writer->write(writer,t->data,t->len)!=t->len)
1259 fprintf(stderr,"WriteTag() failed: Data.\n");
1265 else if (t->len) fprintf(stderr,"WriteTag(): Tag Data Error, id=%i\n",t->id);
1269 writer->flush(writer);
1270 printf("TAG %s costs %d bytes\n", swf_TagGetName(t), writer->pos-oldpos);
1274 return t->len+(short_tag?2:6);
1277 int swf_WriteTag(int handle, TAG * t)
1282 return swf_WriteTag2(0, t);
1283 writer_init_filewriter(&writer, handle);
1284 len = swf_WriteTag2(&writer, t);
1285 writer.finish(&writer);
1289 int swf_DefineSprite_GetRealSize(TAG * t)
1290 // Sprite Handling: Helper function to pack DefineSprite-Tag
1292 if(len>4) { // folded sprite
1296 { t = swf_NextTag(t);
1297 if (t && t->id!=ST_DEFINESPRITE) len += swf_WriteTag(-1, t);
1299 } while (t&&(t->id!=ST_END));
1303 void swf_UnFoldSprite(TAG * t)
1308 U16 spriteid,spriteframes;
1310 if(t->id!=ST_DEFINESPRITE)
1312 if(t->len<=4) // not folded
1317 spriteid = swf_GetU16(t); //id
1318 spriteframes = swf_GetU16(t); //frames
1325 tmp = swf_GetU16(t);
1330 if(id == ST_DEFINESPRITE && len<=4)
1334 len = swf_GetU32(t);
1335 it = swf_InsertTag(next, id);
1340 { it->data = (U8*)rfx_alloc(it->len);
1341 it->memsize = it->len;
1342 swf_GetBlock(t, it->data, it->len);
1349 rfx_free(t->data); t->data = 0;
1350 t->memsize = t->len = t->pos = 0;
1352 swf_SetU16(t, spriteid);
1353 swf_SetU16(t, spriteframes);
1356 void swf_FoldSprite(TAG * t)
1361 if(t->id!=ST_DEFINESPRITE)
1365 fprintf(stderr, "Error: Sprite has no ID!");
1370 /* sprite is already folded */
1377 t->len = t->pos = t->memsize = 0;
1382 t = swf_NextTag(sprtag);
1387 if(t->id==ST_SHOWFRAME) frames++;
1388 if(t->id == ST_DEFINESPRITE && t->len<=4)
1393 } while(t && level);
1395 fprintf(stderr, "rfxswf error: sprite doesn't end(1)\n");
1397 swf_SetU16(sprtag, id);
1398 swf_SetU16(sprtag, frames);
1400 t = swf_NextTag(sprtag);
1406 (t->id!=ST_DEFINEBITSLOSSLESS&&t->id!=ST_DEFINEBITSLOSSLESS2&&t->id!=ST_SOUNDSTREAMBLOCK&&
1407 t->id!=ST_DEFINEBITSJPEG&&t->id!=ST_DEFINEBITSJPEG2&&t->id!=ST_DEFINEBITSJPEG3)
1409 swf_SetU16(sprtag,t->len|(t->id<<6));
1411 swf_SetU16(sprtag,0x3f|(t->id<<6));
1412 swf_SetU32(sprtag,t->len);
1415 swf_SetBlock(sprtag,t->data, t->len);
1417 if(t->id == ST_DEFINESPRITE && t->len<=4)
1422 swf_DeleteTag(0, tmp);
1426 fprintf(stderr, "rfxswf error: sprite doesn't end(2)\n");
1428 // sprtag->next = t;
1429 // t->prev = sprtag;
1432 int swf_IsFolded(TAG * t)
1434 return (t->id == ST_DEFINESPRITE && t->len>4);
1437 void swf_FoldAll(SWF*swf)
1439 TAG*tag = swf->firstTag;
1440 //swf_DumpSWF(stdout, swf);
1442 if(tag->id == ST_DEFINESPRITE) {
1443 swf_FoldSprite(tag);
1444 //swf_DumpSWF(stdout, swf);
1446 tag = swf_NextTag(tag);
1450 void swf_UnFoldAll(SWF*swf)
1452 TAG*tag = swf->firstTag;
1454 if(tag->id == ST_DEFINESPRITE)
1455 swf_UnFoldSprite(tag);
1460 void swf_OptimizeTagOrder(SWF*swf)
1467 /* at the moment, we don't actually do optimizing,
1468 only fixing of non-spec-conformant things like
1475 tag = swf->firstTag;
1478 if(tag->id == ST_DEFINESPRITE) {
1480 /* ??? all sprites are supposed to be unfolded */
1481 fprintf(stderr, "librfxswf error - internal error in OptimizeTagOrder/UnfoldAll\n");
1491 /* move non-sprite tags out of sprite */
1492 if(!swf_isAllowedSpriteTag(tag) || level>=2) {
1493 /* remove tag from current position */
1494 tag->prev->next = tag->next;
1496 tag->next->prev = tag->prev;
1498 /* insert before tag level0 */
1500 tag->prev = level0->prev;
1503 tag->prev->next = tag;
1505 swf->firstTag = tag;
1509 if(tag->id == ST_END) {
1520 int swf_ReadSWF2(reader_t*reader, SWF * swf) // Reads SWF to memory (malloc'ed), returns length or <0 if fails
1522 if (!swf) return -1;
1523 memset(swf,0x00,sizeof(SWF));
1525 { char b[32]; // read Header
1531 if ((len = reader->read(reader ,b,8))<8) return -1;
1533 if (b[0]!='F' && b[0]!='C') return -1;
1534 if (b[1]!='W') return -1;
1535 if (b[2]!='S') return -1;
1536 swf->fileVersion = b[3];
1537 swf->compressed = (b[0]=='C')?1:0;
1538 swf->fileSize = GET32(&b[4]);
1540 if(swf->compressed) {
1541 reader_init_zlibinflate(&zreader, reader);
1544 swf->compressed = 0; // derive from version number from now on
1546 reader_GetRect(reader, &swf->movieSize);
1547 reader->read(reader, &swf->frameRate, 2);
1548 swf->frameRate = SWAP16(swf->frameRate);
1549 reader->read(reader, &swf->frameCount, 2);
1550 swf->frameCount = SWAP16(swf->frameCount);
1552 /* read tags and connect to list */
1556 t = swf_ReadTag(reader,t);
1557 if(t && t->id == ST_FILEATTRIBUTES) {
1558 swf->fileAttributes = swf_GetU32(t);
1559 swf_ResetReadBits(t);
1562 swf->firstTag = t1.next;
1564 t1.next->prev = NULL;
1570 SWF* swf_OpenSWF(char*filename)
1572 int fi = open(filename, O_RDONLY|O_BINARY);
1574 fprintf(stderr, "Failed to open %s\n", filename);
1577 SWF* swf = rfx_alloc(sizeof(SWF));
1578 swf_ReadSWF(fi, swf);
1583 int swf_ReadSWF(int handle, SWF * swf)
1586 reader_init_filereader(&reader, handle);
1587 return swf_ReadSWF2(&reader, swf);
1590 void swf_ReadABCfile(char*filename, SWF*swf)
1592 memset(swf, 0, sizeof(SWF));
1594 swf->fileAttributes=FILEATTRIBUTE_AS3; //as3
1595 TAG*tag = swf->firstTag = swf_InsertTag(0, ST_RAWABC);
1596 memfile_t*file = memfile_open(filename);
1597 swf_SetBlock(tag, file->data, file->len);
1598 memfile_close(file);
1601 int no_extra_tags = 0;
1603 int WriteExtraTags(SWF*swf, writer_t*writer)
1605 TAG*t = swf->firstTag;
1606 TAG* has_fileattributes=0;
1607 int has_scenedescription=0;
1608 int has_version_8_action=0;
1609 int has_version_9_action=0;
1612 if(t->id == ST_FILEATTRIBUTES)
1613 has_fileattributes = t;
1614 if(t->id == ST_SCENEDESCRIPTION)
1615 has_scenedescription = 1;
1616 if(t->id == ST_DOABC)
1617 has_version_9_action=1;
1618 /* FIXME: this doesn't yet find actionscript in buttons */
1619 if(t->id == ST_DOACTION || t->id == ST_DOINITACTION)
1620 has_version_8_action=1;
1621 if(t->id == ST_PLACEOBJECT2 && t->len && (t->data[0]&0x80))
1622 has_version_8_action=1;
1625 if(has_version_8_action && has_version_9_action) {
1626 fprintf(stderr, "Warning: File contains both flash 8 and flash 9 actionscript\n");
1629 if(swf->fileVersion >= 9) {
1630 if(!has_fileattributes) {
1631 U32 flags = swf->fileAttributes|FILEATTRIBUTE_AS3; // 16 = has symbolclass tag | 8 = actionscript3 | 1 = usenetwork
1632 if(has_version_8_action && !has_version_9_action)
1633 flags &= ~FILEATTRIBUTE_AS3;
1634 TAG*fileattrib = swf_InsertTag(0, ST_FILEATTRIBUTES);
1635 swf_SetU32(fileattrib, flags);
1637 if(swf_WriteTag2(writer, fileattrib)<0)
1640 len += swf_WriteTag(-1,fileattrib);
1642 swf_DeleteTag(0, fileattrib);
1644 if(swf->fileAttributes) {
1645 /* if we're writing a file out again where we might have possible
1646 modified the fileattributes in the header, adjust the tag data */
1647 TAG*tt = swf_CopyTag(0,has_fileattributes);
1648 U32 flags = swf_GetU32(tt) | swf->fileAttributes;
1649 swf_ResetTag(tt, tt->id);
1650 swf_SetU32(tt, flags);
1651 if(swf_WriteTag2(writer, has_fileattributes)<0) return -1;
1652 swf_DeleteTag(0, tt);
1654 if(swf_WriteTag2(writer, has_fileattributes)<0)
1658 if(0 && !has_scenedescription) {
1659 TAG*scene = swf_InsertTag(0, ST_SCENEDESCRIPTION);
1660 swf_SetU16(scene, 1);
1661 swf_SetString(scene, "Scene 1");
1662 swf_SetU8(scene, 0);
1664 if(swf_WriteTag2(writer, scene)<0)
1667 len += swf_WriteTag(-1,scene);
1669 swf_DeleteTag(0, scene);
1675 int swf_WriteSWF2(writer_t*writer, SWF * swf) // Writes SWF to file, returns length or <0 if fails
1683 writer_t*original_writer = writer;
1684 int writer_lastpos = 0;
1686 if (!swf) return -1;
1687 if (!writer) return -1; // the caller should provide a nullwriter, not 0, for querying SWF size
1689 if(original_writer) writer_lastpos = original_writer->pos;
1691 // Count Frames + File Size
1697 if(swf->firstTag && !no_extra_tags) {
1698 len += WriteExtraTags(swf, 0);
1701 len += swf_WriteTag(-1,t);
1702 if(t->id == ST_DEFINESPRITE && !swf_IsFolded(t)) inSprite++;
1703 else if(t->id == ST_END && inSprite) inSprite--;
1704 else if(t->id == ST_END && !inSprite) {
1705 if(t->prev && t->prev->id!=ST_SHOWFRAME)
1708 else if(t->id == ST_SHOWFRAME && !inSprite) frameCount++;
1716 memset(&t1,0x00,sizeof(TAG));
1720 { // measure header file size
1723 memset(&t2,0x00,sizeof(TAG));
1726 swf_SetRect(&t2, &swf->movieSize);
1727 swf_SetU16(&t2, swf->frameRate);
1728 swf_SetU16(&t2, swf->frameCount);
1729 l = swf_GetTagLen(&t2)+8;
1731 if(swf->compressed == 8) {
1736 if(len) {// don't touch headers without tags
1737 swf->fileSize = fileSize;
1738 swf->frameCount = frameCount;
1741 if(swf->compressed != 8) {
1742 /* compressed flag set to 8 means "skip first 8
1743 header bytes". This is necessary if the caller wants to
1744 create compressed SWFs himself .
1745 It also means that we don't initialize our own zlib
1746 writer, but assume the caller provided one.
1748 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6)) {
1750 writer->write(writer, id, 3);
1753 writer->write(writer, id, 3);
1756 writer->write(writer, &swf->fileVersion, 1);
1757 PUT32(b4, swf->fileSize);
1758 writer->write(writer, b4, 4);
1760 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6)) {
1761 writer_init_zlibdeflate(&zwriter, writer);
1766 swf_SetRect(&t1,&swf->movieSize);
1767 swf_SetU16(&t1,swf->frameRate);
1768 swf_SetU16(&t1,swf->frameCount);
1770 ret = writer->write(writer,b,swf_GetTagLen(&t1));
1771 if (ret!=swf_GetTagLen(&t1))
1774 fprintf(stderr, "ret:%d\n",ret);
1776 fprintf(stderr,"WriteSWF() failed: Header.\n");
1781 if(swf->firstTag && !no_extra_tags) {
1782 WriteExtraTags(swf, writer);
1787 if(no_extra_tags || t->id != ST_FILEATTRIBUTES) {
1788 if(swf_WriteTag2(writer, t)<0)
1793 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6) || swf->compressed==8) {
1794 if(swf->compressed != 8) {
1795 zwriter.finish(&zwriter);
1796 return original_writer->pos - writer_lastpos;
1798 return (int)fileSize;
1800 return (int)fileSize;
1805 int swf_SaveSWF(SWF * swf, char*filename)
1807 int fi = open(filename, O_BINARY|O_RDWR|O_TRUNC|O_CREAT, 0777);
1812 if(swf_WriteSWF(fi, swf)<0) {
1813 fprintf(stderr, "Unable to write output file: %s\n", filename);
1820 int swf_WriteSWF(int handle, SWF * swf) // Writes SWF to file, returns length or <0 if fails
1826 writer_init_nullwriter(&writer);
1827 len = swf_WriteSWF2(&writer, swf);
1830 writer_init_filewriter(&writer, handle);
1831 len = swf_WriteSWF2(&writer, swf);
1832 writer.finish(&writer);
1836 int swf_WriteHeader2(writer_t*writer,SWF * swf)
1839 memcpy(&myswf,swf,sizeof(SWF));
1841 return swf_WriteSWF2(writer, &myswf);
1844 int swf_WriteHeader(int handle,SWF * swf)
1847 memcpy(&myswf,swf,sizeof(SWF));
1849 return swf_WriteSWF(handle, &myswf);
1852 int swf_WriteCGI(SWF * swf)
1856 len = swf_WriteSWF(-1,swf);
1858 if (len<0) return -1;
1860 sprintf(s,"Content-type: application/x-shockwave-flash\n"
1861 "Accept-Ranges: bytes\n"
1862 "Content-Length: %lu\n"
1863 "Expires: Thu, 13 Apr 2000 23:59:59 GMT\n"
1866 write(fileno(stdout),s,strlen(s));
1867 return swf_WriteSWF(fileno(stdout),swf);
1870 SWF* swf_CopySWF(SWF*swf)
1872 SWF*nswf = (SWF*)rfx_alloc(sizeof(SWF));
1874 memcpy(nswf, swf, sizeof(SWF));
1876 tag = swf->firstTag;
1879 ntag = swf_CopyTag(ntag, tag);
1881 nswf->firstTag = ntag;
1887 void swf_FreeTags(SWF * swf) // Frees all malloc'ed memory for tags
1888 { TAG * t = swf->firstTag;
1891 { TAG * tnew = t->next;
1892 if (t->data) rfx_free(t->data);
1899 // include advanced functions
1901 //#include "modules/swfdump.c"
1902 //#include "modules/swfshape.c"
1903 //#include "modules/swftext.c"
1904 //#include "modules/swffont.c"
1905 //#include "modules/swfobject.c"
1906 //#include "modules/swfbutton.c"
1907 //#include "modules/swftools.c"
1908 //#include "modules/swfcgi.c"
1909 //#include "modules/swfbits.c"
1910 //#include "modules/swfaction.c"
1911 //#include "modules/swfabc.c"
1912 //#include "modules/swfsound.c"
1913 //#include "modules/swfdraw.c"
1914 //#include "modules/swfrender.c"
1915 //#include "modules/swffilter.c"