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 int swf_SetRGB(TAG * t,RGBA * col)
284 { swf_SetU8(t,col->r);
287 } else swf_SetBlock(t,NULL,3);
290 void swf_GetRGB(TAG * t, RGBA * col)
295 col->r = swf_GetU8(t);
296 col->g = swf_GetU8(t);
297 col->b = swf_GetU8(t);
301 int swf_SetRGBA(TAG * t,RGBA * col)
304 { swf_SetU8(t,col->r);
308 } else swf_SetBlock(t,NULL,4);
311 void swf_GetRGBA(TAG * t, RGBA * col)
316 col->r = swf_GetU8(t);
317 col->g = swf_GetU8(t);
318 col->b = swf_GetU8(t);
319 col->a = swf_GetU8(t);
322 void swf_GetGradient(TAG * tag, GRADIENT * gradient, char alpha)
326 memset(gradient, 0, sizeof(GRADIENT));
329 U8 num = swf_GetU8(tag) & 15;
332 gradient->rgba = (RGBA*)rfx_calloc(sizeof(RGBA)*gradient->num);
333 gradient->ratios = (U8*)rfx_calloc(sizeof(gradient->ratios[0])*gradient->num);
337 U8 ratio = swf_GetU8(tag);
340 swf_GetRGB(tag, &color);
342 swf_GetRGBA(tag, &color);
344 gradient->ratios[t] = ratio;
345 gradient->rgba[t] = color;
350 void swf_SetGradient(TAG * tag, GRADIENT * gradient, char alpha)
354 memset(gradient, 0, sizeof(GRADIENT));
357 swf_SetU8(tag, gradient->num);
358 for(t=0; t<8 && t<gradient->num; t++)
360 swf_SetU8(tag, gradient->ratios[t]);
362 swf_SetRGB(tag, &gradient->rgba[t]);
364 swf_SetRGBA(tag, &gradient->rgba[t]);
368 void swf_FreeGradient(GRADIENT* gradient)
371 rfx_free(gradient->ratios);
373 rfx_free(gradient->rgba);
374 memset(gradient, 0, sizeof(GRADIENT));
377 int swf_CountUBits(U32 v,int nbits)
380 if(v == 0x00000000) n = 0;
386 return (n>nbits)?n:nbits;
389 int swf_CountBits(U32 v,int nbits)
393 { if(v == 0xffffffff) n = 1;
401 { if(v == 0x00000000) n = 0;
408 return (n>nbits)?n:nbits;
411 int swf_GetRect(TAG * t,SRECT * r)
414 if(!t) {r->xmin=r->xmax=r->ymin=r->ymax=0;return 0;}
416 nbits = (int) swf_GetBits(t,5);
417 r->xmin = swf_GetSBits(t,nbits);
418 r->xmax = swf_GetSBits(t,nbits);
419 r->ymin = swf_GetSBits(t,nbits);
420 r->ymax = swf_GetSBits(t,nbits);
424 int reader_GetRect(reader_t*reader,SRECT * r)
428 nbits = (int) reader_GetBits(reader,5);
429 r->xmin = reader_GetSBits(reader,nbits);
430 r->xmax = reader_GetSBits(reader,nbits);
431 r->ymin = reader_GetSBits(reader,nbits);
432 r->ymax = reader_GetSBits(reader,nbits);
436 int swf_SetRect(TAG * t,SRECT * r)
439 nbits = swf_CountBits(r->xmin,0);
440 nbits = swf_CountBits(r->xmax,nbits);
441 nbits = swf_CountBits(r->ymin,nbits);
442 nbits = swf_CountBits(r->ymax,nbits);
444 fprintf(stderr, "rfxswf: Warning: num_bits overflow in swf_SetRect\n");
448 swf_SetBits(t,nbits,5);
449 swf_SetBits(t,r->xmin,nbits);
450 swf_SetBits(t,r->xmax,nbits);
451 swf_SetBits(t,r->ymin,nbits);
452 swf_SetBits(t,r->ymax,nbits);
457 SRECT swf_ClipRect(SRECT border, SRECT r)
459 if(r.xmax > border.xmax) r.xmax = border.xmax;
460 if(r.ymax > border.ymax) r.ymax = border.ymax;
461 if(r.xmax < border.xmin) r.xmax = border.xmin;
462 if(r.ymax < border.ymin) r.ymax = border.ymin;
464 if(r.xmin > border.xmax) r.xmin = border.xmax;
465 if(r.ymin > border.ymax) r.ymin = border.ymax;
466 if(r.xmin < border.xmin) r.xmin = border.xmin;
467 if(r.ymin < border.ymin) r.ymin = border.ymin;
471 void swf_ExpandRect(SRECT*src, SPOINT add)
473 if((src->xmin | src->ymin | src->xmax | src->ymax)==0) {
478 if((add.x|add.y) == 0) src->xmax++; //make sure the bbox is not NULL anymore
481 if(add.x < src->xmin)
483 if(add.x > src->xmax)
485 if(add.y < src->ymin)
487 if(add.y > src->ymax)
490 void swf_ExpandRect2(SRECT*src, SRECT*add)
492 if((add->xmin | add->ymin | add->xmax | add->ymax)==0)
494 if((src->xmin | src->ymin | src->xmax | src->ymax)==0)
496 if(add->xmin < src->xmin)
497 src->xmin = add->xmin;
498 if(add->ymin < src->ymin)
499 src->ymin = add->ymin;
500 if(add->xmax > src->xmax)
501 src->xmax = add->xmax;
502 if(add->ymax > src->ymax)
503 src->ymax = add->ymax;
505 void swf_ExpandRect3(SRECT*src, SPOINT center, int radius)
507 if((src->xmin | src->ymin | src->xmax | src->ymax)==0) {
508 src->xmin = center.x-radius;
509 src->ymin = center.y-radius;
510 src->xmax = center.x+radius;
511 src->ymax = center.y+radius;
512 if((center.x|center.y|radius) == 0) src->xmax++; //make sure the bbox is not NULL anymore
515 if(center.x - radius < src->xmin)
516 src->xmin = center.x - radius;
517 if(center.x + radius > src->xmax)
518 src->xmax = center.x + radius;
519 if(center.y - radius < src->ymin)
520 src->ymin = center.y - radius;
521 if(center.y + radius > src->ymax)
522 src->ymax = center.y + radius;
524 SPOINT swf_TurnPoint(SPOINT p, MATRIX* m)
527 r.x = (int)(m->sx*(1/65536.0)*p.x + m->r1*(1/65536.0)*p.y + 0.5) + m->tx;
528 r.y = (int)(m->r0*(1/65536.0)*p.x + m->sy*(1/65536.0)*p.y + 0.5) + m->ty;
531 SRECT swf_TurnRect(SRECT r, MATRIX* m)
534 SPOINT p1,p2,p3,p4,pp1,pp2,pp3,pp4;
537 p1.x = r.xmin;p1.y = r.ymin;
538 p2.x = r.xmax;p2.y = r.ymin;
539 p3.x = r.xmin;p3.y = r.ymax;
540 p4.x = r.xmax;p4.y = r.ymax;
541 pp1 = swf_TurnPoint(p1, m);
542 pp2 = swf_TurnPoint(p2, m);
543 pp3 = swf_TurnPoint(p3, m);
544 pp4 = swf_TurnPoint(p4, m);
545 g.xmin = g.xmax = pp1.x;
546 g.ymin = g.ymax = pp1.y;
547 swf_ExpandRect(&g, pp2);
548 swf_ExpandRect(&g, pp3);
549 swf_ExpandRect(&g, pp4);
554 int swf_GetMatrix(TAG * t,MATRIX * m)
561 { m->sx = m->sy = 0x10000;
567 swf_ResetReadBits(t);
569 if (swf_GetBits(t,1))
570 { nbits = swf_GetBits(t,5);
571 m->sx = swf_GetSBits(t,nbits);
572 m->sy = swf_GetSBits(t,nbits);
574 else m->sx = m->sy = 0x10000;
576 if (swf_GetBits(t,1))
577 { nbits = swf_GetBits(t,5);
578 m->r0 = swf_GetSBits(t,nbits);
579 m->r1 = swf_GetSBits(t,nbits);
581 else m->r0 = m->r1 = 0x0;
583 nbits = swf_GetBits(t,5);
584 m->tx = swf_GetSBits(t,nbits);
585 m->ty = swf_GetSBits(t,nbits);
590 int swf_SetMatrix(TAG * t,MATRIX * m)
596 ma.sx = ma.sy = 0x10000;
601 swf_ResetWriteBits(t);
603 if ((m->sx==0x10000)&&(m->sy==0x10000)) swf_SetBits(t,0,1);
605 { swf_SetBits(t,1,1);
606 nbits = swf_CountBits(m->sx,0);
607 nbits = swf_CountBits(m->sy,nbits);
609 /* TODO: happens on AMD64 systems for normal values? */
610 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
613 swf_SetBits(t,nbits,5);
614 swf_SetBits(t,m->sx,nbits);
615 swf_SetBits(t,m->sy,nbits);
618 if ((!m->r0)&&(!m->r1)) swf_SetBits(t,0,1);
620 { swf_SetBits(t,1,1);
621 nbits = swf_CountBits(m->r0,0);
622 nbits = swf_CountBits(m->r1,nbits);
624 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
627 swf_SetBits(t,nbits,5);
628 swf_SetBits(t,m->r0,nbits);
629 swf_SetBits(t,m->r1,nbits);
632 nbits = swf_CountBits(m->tx,0);
633 nbits = swf_CountBits(m->ty,nbits);
635 fprintf(stderr,"rfxswf: Error: matrix values too large\n");
638 swf_SetBits(t,nbits,5);
639 swf_SetBits(t,m->tx,nbits);
640 swf_SetBits(t,m->ty,nbits);
645 int swf_GetCXForm(TAG * t,CXFORM * cx,U8 alpha)
653 cx->a0 = cx->r0 = cx->g0 = cx->b0 = 256;
654 cx->a1 = cx->r1 = cx->g1 = cx->b1 = 0;
658 swf_ResetReadBits(t);
659 hasadd = swf_GetBits(t,1);
660 hasmul = swf_GetBits(t,1);
661 nbits = swf_GetBits(t,4);
664 { cx->r0 = (S16)swf_GetSBits(t,nbits);
665 cx->g0 = (S16)swf_GetSBits(t,nbits);
666 cx->b0 = (S16)swf_GetSBits(t,nbits);
668 cx->a0 = (S16)swf_GetSBits(t,nbits);
672 { cx->r1 = (S16)swf_GetSBits(t,nbits);
673 cx->g1 = (S16)swf_GetSBits(t,nbits);
674 cx->b1 = (S16)swf_GetSBits(t,nbits);
676 cx->a1 = (S16)swf_GetSBits(t,nbits);
682 int swf_SetCXForm(TAG * t,CXFORM * cx,U8 alpha)
690 cx->a0 = cx->r0 = cx->g0 = cx->b0 = 256;
691 cx->a1 = cx->r1 = cx->g1 = cx->b1 = 0;
701 hasmul = (cx->a0!=256)||(cx->r0!=256)||(cx->g0!=256)||(cx->b0!=256);
702 hasadd = cx->a1|cx->r1|cx->g1|cx->b1;
705 { if (alpha) nbits = swf_CountBits((S32)cx->a0,nbits);
706 nbits = swf_CountBits((S32)cx->r0,nbits);
707 nbits = swf_CountBits((S32)cx->g0,nbits);
708 nbits = swf_CountBits((S32)cx->b0,nbits);
712 { if (alpha) nbits = swf_CountBits((S32)cx->a1,nbits);
713 nbits = swf_CountBits((S32)cx->r1,nbits);
714 nbits = swf_CountBits((S32)cx->g1,nbits);
715 nbits = swf_CountBits((S32)cx->b1,nbits);
718 swf_ResetWriteBits(t);
719 swf_SetBits(t,hasadd?1:0,1);
720 swf_SetBits(t,hasmul?1:0,1);
721 swf_SetBits(t,nbits,4);
724 { swf_SetBits(t,cx->r0,nbits);
725 swf_SetBits(t,cx->g0,nbits);
726 swf_SetBits(t,cx->b0,nbits);
727 if (alpha) swf_SetBits(t,cx->a0,nbits);
731 { swf_SetBits(t,cx->r1,nbits);
732 swf_SetBits(t,cx->g1,nbits);
733 swf_SetBits(t,cx->b1,nbits);
734 if (alpha) swf_SetBits(t,cx->a1,nbits);
740 //int swf_GetPoint(TAG * t,SPOINT * p) { return 0; }
741 //int swf_SetPoint(TAG * t,SPOINT * p) { return 0; }
743 void swf_SetPassword(TAG * t, const char * password)
745 /* WARNING: crypt_md5 is not reentrant */
749 #if defined(HAVE_LRAND48) && defined(HAVE_SRAND48) && defined(HAVE_TIME_H) && defined(HAVE_TIME)
751 salt[0] = "abcdefghijklmnopqrstuvwxyz0123456789"[lrand48()%36];
752 salt[1] = "abcdefghijklmnopqrstuvwxyz0123456789"[lrand48()%36];
756 fprintf(stderr, "rfxswf: Warning- no usable random generator found\n");
757 fprintf(stderr, "Your password will be vulnerable to dictionary attacks\n");
761 md5string = crypt_md5(password, salt);
764 swf_SetString(t, (U8*)md5string);
767 int swf_VerifyPassword(TAG * t, const char * password)
769 char*md5string1, *md5string2;
774 if(t->len >= 5 && t->pos==0 &&
779 printf("%d %d %d %d\n", t->len, t->pos, t->data[0], t->data[1]);
782 md5string1 = swf_GetString(t);
784 if(strncmp(md5string1, "$1$",3 )) {
785 fprintf(stderr, "rfxswf: no salt in pw string\n");
788 x = strchr(md5string1+3, '$');
790 fprintf(stderr, "rfxswf: invalid salt format in pw string\n");
793 n = x-(md5string1+3);
794 salt = (char*)rfx_alloc(n+1);
795 memcpy(salt, md5string1+3, n);
798 md5string2 = crypt_md5(password, salt);
800 if(strcmp(md5string1, md5string2) != 0)
805 // Tag List Manipulating Functions
807 TAG * swf_InsertTag(TAG * after,U16 id)
810 t = (TAG *)rfx_calloc(sizeof(TAG));
816 t->next = after->next;
818 if (t->next) t->next->prev = t;
823 TAG * swf_InsertTagBefore(SWF* swf, TAG * before,U16 id)
826 t = (TAG *)rfx_calloc(sizeof(TAG));
832 t->prev = before->prev;
834 if (t->prev) t->prev->next = t;
836 if(swf && swf->firstTag == before) {
842 void swf_ClearTag(TAG * t)
844 if (t->data) rfx_free(t->data);
853 void swf_ResetTag(TAG*tag, U16 id)
855 tag->len = tag->pos = tag->readBit = tag->writeBit = 0;
859 TAG* swf_CopyTag(TAG*tag, TAG*to_copy)
861 tag = swf_InsertTag(tag, to_copy->id);
862 swf_SetBlock(tag, to_copy->data, to_copy->len);
866 TAG* swf_DeleteTag(SWF*swf, TAG * t)
870 if (swf && swf->firstTag==t)
871 swf->firstTag = t->next;
872 if (t->prev) t->prev->next = t->next;
873 if (t->next) t->next->prev = t->prev;
875 if (t->data) rfx_free(t->data);
880 TAG * swf_ReadTag(reader_t*reader, TAG * prev)
886 if (reader->read(reader, &raw, 2) !=2 ) return NULL;
894 if (reader->read(reader, &len, 4) != 4) return NULL;
898 if (id==ST_DEFINESPRITE) len = 2*sizeof(U16);
899 // Sprite handling fix: Flatten sprite tree
901 t = (TAG *)rfx_calloc(sizeof(TAG));
907 { t->data = (U8*)rfx_alloc(t->len);
909 if (reader->read(reader, t->data, t->len) != t->len) {
910 fprintf(stderr, "rfxswf: Warning: Short read (tagid %d). File truncated?\n", t->id);
911 free(t->data);t->data=0;
926 int swf_DefineSprite_GetRealSize(TAG * t);
928 int swf_WriteTag2(writer_t*writer, TAG * t)
929 // returns tag length in bytes (incl. Header), -1 = Error
930 // writer = 0 -> no output
937 len = (t->id==ST_DEFINESPRITE)?swf_DefineSprite_GetRealSize(t):t->len;
939 short_tag = len<0x3f&&
940 (t->id!=ST_DEFINEBITSLOSSLESS&&t->id!=ST_DEFINEBITSLOSSLESS2&&t->id!=ST_SOUNDSTREAMBLOCK&&
941 t->id!=ST_DEFINEBITSJPEG&&t->id!=ST_DEFINEBITSJPEG2&&t->id!=ST_DEFINEBITSJPEG3);
946 int oldpos = writer->pos;
950 { raw[0] = SWAP16(len|((t->id&0x3ff)<<6));
951 if (writer->write(writer,raw,2)!=2)
954 fprintf(stderr,"WriteTag() failed: Short Header.\n");
961 raw[0] = SWAP16((t->id<<6)|0x3f);
962 if (writer->write(writer,raw,2)!=2)
965 fprintf(stderr,"WriteTag() failed: Long Header (1).\n");
971 if (writer->write(writer,&len,4)!=4)
974 fprintf(stderr,"WriteTag() failed: Long Header (2).\n");
981 { if (writer->write(writer,t->data,t->len)!=t->len)
984 fprintf(stderr,"WriteTag() failed: Data.\n");
990 else if (t->len) fprintf(stderr,"WriteTag(): Tag Data Error, id=%i\n",t->id);
994 writer->flush(writer);
995 printf("TAG %s costs %d bytes\n", swf_TagGetName(t), writer->pos-oldpos);
999 return t->len+(short_tag?2:6);
1002 int swf_WriteTag(int handle, TAG * t)
1007 return swf_WriteTag2(0, t);
1008 writer_init_filewriter(&writer, handle);
1009 len = swf_WriteTag2(&writer, t);
1010 writer.finish(&writer);
1014 int swf_DefineSprite_GetRealSize(TAG * t)
1015 // Sprite Handling: Helper function to pack DefineSprite-Tag
1017 if(len>4) { // folded sprite
1021 { t = swf_NextTag(t);
1022 if (t && t->id!=ST_DEFINESPRITE) len += swf_WriteTag(-1, t);
1024 } while (t&&(t->id!=ST_END));
1028 void swf_UnFoldSprite(TAG * t)
1033 U16 spriteid,spriteframes;
1035 if(t->id!=ST_DEFINESPRITE)
1037 if(t->len<=4) // not folded
1042 spriteid = swf_GetU16(t); //id
1043 spriteframes = swf_GetU16(t); //frames
1050 tmp = swf_GetU16(t);
1055 if(id == ST_DEFINESPRITE && len<=4)
1059 len = swf_GetU32(t);
1060 it = swf_InsertTag(next, id);
1065 { it->data = (U8*)rfx_alloc(it->len);
1066 it->memsize = it->len;
1067 swf_GetBlock(t, it->data, it->len);
1074 rfx_free(t->data); t->data = 0;
1075 t->memsize = t->len = t->pos = 0;
1077 swf_SetU16(t, spriteid);
1078 swf_SetU16(t, spriteframes);
1081 void swf_FoldSprite(TAG * t)
1086 if(t->id!=ST_DEFINESPRITE)
1089 fprintf(stderr, "Error: Sprite has no ID!");
1093 /* sprite is already folded */
1100 t->len = t->pos = t->memsize = 0;
1105 t = swf_NextTag(sprtag);
1110 if(t->id==ST_SHOWFRAME) frames++;
1111 if(t->id == ST_DEFINESPRITE && t->len<=4)
1116 } while(t && level);
1118 fprintf(stderr, "rfxswf error: sprite doesn't end(1)\n");
1120 swf_SetU16(sprtag, id);
1121 swf_SetU16(sprtag, frames);
1123 t = swf_NextTag(sprtag);
1129 (t->id!=ST_DEFINEBITSLOSSLESS&&t->id!=ST_DEFINEBITSLOSSLESS2&&t->id!=ST_SOUNDSTREAMBLOCK&&
1130 t->id!=ST_DEFINEBITSJPEG&&t->id!=ST_DEFINEBITSJPEG2&&t->id!=ST_DEFINEBITSJPEG3)
1132 swf_SetU16(sprtag,t->len|(t->id<<6));
1134 swf_SetU16(sprtag,0x3f|(t->id<<6));
1135 swf_SetU32(sprtag,t->len);
1138 swf_SetBlock(sprtag,t->data, t->len);
1140 if(t->id == ST_DEFINESPRITE && t->len<=4)
1145 swf_DeleteTag(0, tmp);
1149 fprintf(stderr, "rfxswf error: sprite doesn't end(2)\n");
1151 // sprtag->next = t;
1152 // t->prev = sprtag;
1155 int swf_IsFolded(TAG * t)
1157 return (t->id == ST_DEFINESPRITE && t->len>4);
1160 void swf_FoldAll(SWF*swf)
1162 TAG*tag = swf->firstTag;
1163 //swf_DumpSWF(stdout, swf);
1165 if(tag->id == ST_DEFINESPRITE) {
1166 swf_FoldSprite(tag);
1167 //swf_DumpSWF(stdout, swf);
1169 tag = swf_NextTag(tag);
1173 void swf_UnFoldAll(SWF*swf)
1175 TAG*tag = swf->firstTag;
1177 if(tag->id == ST_DEFINESPRITE)
1178 swf_UnFoldSprite(tag);
1183 void swf_OptimizeTagOrder(SWF*swf)
1190 /* at the moment, we don't actually do optimizing,
1191 only fixing of non-spec-conformant things like
1198 tag = swf->firstTag;
1201 if(tag->id == ST_DEFINESPRITE) {
1203 /* ??? all sprites are supposed to be unfolded */
1204 fprintf(stderr, "librfxswf error - internal error in OptimizeTagOrder/UnfoldAll\n");
1214 /* move non-sprite tags out of sprite */
1215 if(!swf_isAllowedSpriteTag(tag) || level>=2) {
1216 /* remove tag from current position */
1217 tag->prev->next = tag->next;
1219 tag->next->prev = tag->prev;
1221 /* insert before tag level0 */
1223 tag->prev = level0->prev;
1226 tag->prev->next = tag;
1228 swf->firstTag = tag;
1232 if(tag->id == ST_END) {
1243 int swf_ReadSWF2(reader_t*reader, SWF * swf) // Reads SWF to memory (malloc'ed), returns length or <0 if fails
1245 if (!swf) return -1;
1246 memset(swf,0x00,sizeof(SWF));
1248 { char b[32]; // read Header
1254 if ((len = reader->read(reader ,b,8))<8) return -1;
1256 if (b[0]!='F' && b[0]!='C') return -1;
1257 if (b[1]!='W') return -1;
1258 if (b[2]!='S') return -1;
1259 swf->fileVersion = b[3];
1260 swf->compressed = (b[0]=='C')?1:0;
1261 swf->fileSize = GET32(&b[4]);
1263 if(swf->compressed) {
1264 reader_init_zlibinflate(&zreader, reader);
1267 swf->compressed = 0; // derive from version number from now on
1269 reader_GetRect(reader, &swf->movieSize);
1270 reader->read(reader, &swf->frameRate, 2);
1271 swf->frameRate = SWAP16(swf->frameRate);
1272 reader->read(reader, &swf->frameCount, 2);
1273 swf->frameCount = SWAP16(swf->frameCount);
1275 /* read tags and connect to list */
1277 while (t) t = swf_ReadTag(reader,t);
1278 swf->firstTag = t1.next;
1279 t1.next->prev = NULL;
1285 int swf_ReadSWF(int handle, SWF * swf)
1288 reader_init_filereader(&reader, handle);
1289 return swf_ReadSWF2(&reader, swf);
1292 int swf_WriteSWF2(writer_t*writer, SWF * swf) // Writes SWF to file, returns length or <0 if fails
1299 int writer_lastpos = 0;
1302 if (!swf) return -1;
1303 if (!writer) return -1; // the caller should provide a nullwriter, not 0, for querying SWF size
1305 if(writer) writer_lastpos = writer->pos;
1307 // Insert REFLEX Tag
1309 #ifdef INSERT_RFX_TAG
1311 if ((swf->firstTag && swf->firstTag->id != ST_REFLEX) &&
1312 (!swf->firstTag->next || (swf->firstTag->next->id != ST_REFLEX &&
1313 (!swf->firstTag->next->next || (swf->firstTag->next->next->id!=ST_REFLEX)))))
1315 swf_SetBlock(swf_InsertTagBefore(swf, swf->firstTag,ST_REFLEX),(U8*)"rfx",3);
1318 #endif // INSERT_RFX_TAG
1320 if(swf->fileVersion >= 9) {
1321 if ((!swf->firstTag || swf->firstTag->id != ST_SCENEDESCRIPTION) &&
1323 !swf->firstTag->next || swf->firstTag->next->id != ST_SCENEDESCRIPTION) &&
1325 !swf->firstTag->next ||
1326 !swf->firstTag->next->next || swf->firstTag->next->next->id != ST_SCENEDESCRIPTION))
1328 TAG*scene = swf_InsertTagBefore(swf, swf->firstTag,ST_SCENEDESCRIPTION);
1329 swf_SetU16(scene, 1);
1330 swf_SetString(scene, (U8*)"Scene 1");
1331 swf_SetU8(scene, 0);
1335 if(swf->fileVersion >= 9) {
1336 if (swf->firstTag && swf->firstTag->id != ST_FILEATTRIBUTES)
1338 U32 flags = 0x8; // | 128 = usenetwork, | 16 = Actionscript3 | 8 = hasmetadata
1339 swf_SetU32(swf_InsertTagBefore(swf, swf->firstTag,ST_FILEATTRIBUTES),flags);
1343 // Count Frames + File Size
1350 len += swf_WriteTag(-1,t);
1351 if(t->id == ST_DEFINESPRITE && !swf_IsFolded(t)) inSprite++;
1352 else if(t->id == ST_END && inSprite) inSprite--;
1353 else if(t->id == ST_END && !inSprite) {
1354 if(t->prev && t->prev->id!=ST_SHOWFRAME)
1357 else if(t->id == ST_SHOWFRAME && !inSprite) frameCount++;
1365 memset(&t1,0x00,sizeof(TAG));
1369 { // measure header file size
1372 memset(&t2,0x00,sizeof(TAG));
1375 swf_SetRect(&t2, &swf->movieSize);
1376 swf_SetU16(&t2, swf->frameRate);
1377 swf_SetU16(&t2, swf->frameCount);
1378 l = swf_GetTagLen(&t2)+8;
1380 if(swf->compressed == 8) {
1385 if(len) {// don't touch headers without tags
1386 swf->fileSize = fileSize;
1387 swf->frameCount = frameCount;
1390 if(swf->compressed != 8) {
1391 /* compressed flag set to 8 means "skip first 8
1392 header bytes". This is necessary if the caller wants to
1393 create compressed SWFs himself .
1394 It also means that we don't initialize our own zlib
1395 writer, but assume the caller provided one.
1397 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6)) {
1399 writer->write(writer, id, 3);
1402 writer->write(writer, id, 3);
1405 writer->write(writer, &swf->fileVersion, 1);
1406 PUT32(b4, swf->fileSize);
1407 writer->write(writer, b4, 4);
1409 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6)) {
1410 writer_init_zlibdeflate(&zwriter, writer);
1415 swf_SetRect(&t1,&swf->movieSize);
1416 swf_SetU16(&t1,swf->frameRate);
1417 swf_SetU16(&t1,swf->frameCount);
1419 ret = writer->write(writer,b,swf_GetTagLen(&t1));
1420 if (ret!=swf_GetTagLen(&t1))
1423 fprintf(stderr, "ret:%d\n",ret);
1425 fprintf(stderr,"WriteSWF() failed: Header.\n");
1432 { if (swf_WriteTag2(writer, t)<0) return -1;
1435 if(swf->compressed==1 || (swf->compressed==0 && swf->fileVersion>=6) || swf->compressed==8) {
1436 if(swf->compressed != 8) {
1437 zwriter.finish(&zwriter);
1438 return writer->pos - writer_lastpos;
1440 return (int)fileSize;
1442 return (int)fileSize;
1447 int swf_WriteSWF(int handle, SWF * swf) // Writes SWF to file, returns length or <0 if fails
1453 writer_init_nullwriter(&writer);
1454 len = swf_WriteSWF2(&writer, swf);
1457 writer_init_filewriter(&writer, handle);
1458 len = swf_WriteSWF2(&writer, swf);
1459 writer.finish(&writer);
1463 int swf_WriteHeader2(writer_t*writer,SWF * swf)
1466 memcpy(&myswf,swf,sizeof(SWF));
1468 return swf_WriteSWF2(writer, &myswf);
1471 int swf_WriteHeader(int handle,SWF * swf)
1474 memcpy(&myswf,swf,sizeof(SWF));
1476 return swf_WriteSWF(handle, &myswf);
1479 int swf_WriteCGI(SWF * swf)
1483 len = swf_WriteSWF(-1,swf);
1485 if (len<0) return -1;
1487 sprintf(s,"Content-type: application/x-shockwave-flash\n"
1488 "Accept-Ranges: bytes\n"
1489 "Content-Length: %lu\n"
1490 "Expires: Thu, 13 Apr 2000 23:59:59 GMT\n"
1493 write(fileno(stdout),s,strlen(s));
1494 return swf_WriteSWF(fileno(stdout),swf);
1497 SWF* swf_CopySWF(SWF*swf)
1499 SWF*nswf = (SWF*)rfx_alloc(sizeof(SWF));
1501 memcpy(nswf, swf, sizeof(SWF));
1503 tag = swf->firstTag;
1506 ntag = swf_CopyTag(ntag, tag);
1508 nswf->firstTag = ntag;
1514 void swf_FreeTags(SWF * swf) // Frees all malloc'ed memory for tags
1515 { TAG * t = swf->firstTag;
1518 { TAG * tnew = t->next;
1519 if (t->data) rfx_free(t->data);
1526 // include advanced functions
1528 //#include "modules/swfdump.c"
1529 //#include "modules/swfshape.c"
1530 //#include "modules/swftext.c"
1531 //#include "modules/swffont.c"
1532 //#include "modules/swfobject.c"
1533 //#include "modules/swfbutton.c"
1534 //#include "modules/swftools.c"
1535 //#include "modules/swfcgi.c"
1536 //#include "modules/swfbits.c"
1537 //#include "modules/swfaction.c"
1538 //#include "modules/swfabc.c"
1539 //#include "modules/swfsound.c"
1540 //#include "modules/swfdraw.c"
1541 //#include "modules/swfrender.c"
1542 //#include "modules/swffilter.c"