+/* mkvideo.c
+ Create a video file.
+
+ Part of the swftools package.
+
+ Copyright (c) 2003 Matthias Kramm <kramm@quiss.org> */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <assert.h>
+#include <math.h>
+#include "../lib/rfxswf.h"
+#include "png.h"
+#include "h263tables.c"
+
+
+void swf_SetVideoStreamDefine(TAG*tag, U16 frames, U16 width, U16 height)
+{
+ width=width&~15; height=height&~15;
+ swf_SetU16(tag, frames);
+ swf_SetU16(tag, width);
+ swf_SetU16(tag, height);
+ swf_SetU8(tag, 1); /* smoothing on */
+ swf_SetU8(tag, 2); /* codec = h.263 sorenson spark */
+}
+
+struct block_t
+{
+ int y1[64];
+ int y2[64];
+ int y3[64];
+ int y4[64];
+ int u[64];
+ int v[64];
+};
+
+struct fblock_t
+{
+ double y1[64];
+ double y2[64];
+ double y3[64];
+ double y4[64];
+ double u[64];
+ double v[64];
+};
+
+void zigzag(int*src)
+{
+ int table[64] = {
+ 0, 1, 5, 6, 14, 15, 27, 28,
+ 2, 4, 7, 13, 16, 26, 29, 42,
+ 3, 8, 12, 17, 25, 30, 41, 43,
+ 9, 11, 18, 24, 31, 40, 44, 53,
+ 10, 19, 23, 32, 39, 45, 52, 54,
+ 20, 22, 33, 38, 46, 51, 55, 60,
+ 21, 34, 37, 47, 50, 56, 59, 61,
+ 35, 36, 48, 49, 57, 58, 62, 63};
+ int tmp[64];
+ int t;
+ for(t=0;t<64;t++) {
+ tmp[table[t]] = src[t];
+ }
+ memcpy(src, tmp, sizeof(int)*64);
+}
+
+#define PI 3.14159265358979
+#define SQRT2 1.414214
+#define RSQRT2 (1.0/1.414214)
+
+void dct(double*src)
+{
+ double tmp[64];
+ int x,y,u,v;
+ for(y=0;y<8;y++)
+ for(x=0;x<8;x++)
+ {
+ double c = 0;
+ for(v=0;v<8;v++)
+ for(u=0;u<8;u++)
+ {
+ double f = 0.25*cos(PI*(2.0*x+1.0)*u/16.0)*cos(PI*(2.0*y+1.0)*v/16.0);
+ if(!u) f *= RSQRT2;
+ if(!v) f *= RSQRT2;
+ c+=f*src[v*8+u];
+ }
+ tmp[y*8+x] = c;
+ }
+ memcpy(src, tmp, sizeof(double)*64);
+}
+
+void idct(double*src)
+{
+ double tmp[64];
+ int x,y,u,v;
+ for(v=0;v<8;v++)
+ for(u=0;u<8;u++)
+ {
+ double c = 0;
+ for(y=0;y<8;y++)
+ for(x=0;x<8;x++)
+ {
+ double f = 0.25*cos(PI*(2.0*x+1.0)*u/16.0)*cos(PI*(2.0*y+1.0)*v/16.0);
+ if(!u) f *= RSQRT2;
+ if(!v) f *= RSQRT2;
+ c+=f*src[y*8+x];
+ }
+ tmp[v*8+u] = c;
+ }
+ memcpy(src, tmp, sizeof(double)*64);
+}
+
+void getregion(struct fblock_t* bb, RGBA*pic, int bx, int by, int width, int height)
+{
+ RGBA*p1 = &pic[by*width*16+bx*16];
+ RGBA*p2 = p1;
+ int linex = width;
+ int y1=0, y2=0, y3=0, y4=0;
+ int u=0,v=0;
+ int x,y;
+ for(y=0;y<8;y++) {
+ for(x=0;x<8;x++) {
+ double r,g,b;
+ r = (p2[x*2].r + p2[x*2+1].r + p2[linex+x*2].r + p2[linex+x*2+1].r)/4.0;
+ g = (p2[x*2].g + p2[x*2+1].g + p2[linex+x*2].g + p2[linex+x*2+1].g)/4.0;
+ b = (p2[x*2].b + p2[x*2+1].b + p2[linex+x*2].b + p2[linex+x*2+1].b)/4.0;
+ bb->u[u++] = (r*-0.169 + g*-0.332 + b*0.500 + 128.0);
+ bb->v[v++] = (r*0.500 + g*-0.419 + b*-0.0813 + 128.0);
+
+ r = p1[x].r; g = p1[x].g; b = p1[x].b;
+ bb->y1[y1++] = (r*0.299 + g*0.587 + b*0.114);
+ r = p1[x+8].r; g = p1[x+8].g; b = p1[x+8].b;
+ bb->y2[y2++] = (r*0.299 + g*0.587 + b*0.114);
+ r = p1[linex*8+x].r; g = p1[linex*8+x].g; b = p1[linex*8+x].b;
+ bb->y3[y3++] = (r*0.299 + g*0.587 + b*0.114);
+ r = p1[linex*8+x+8].r; g = p1[linex*8+x+8].g; b = p1[linex*8+x+8].b;
+ bb->y4[y4++] = (r*0.299 + g*0.587 + b*0.114);
+ }
+ p1+=linex;
+ p2+=linex*2;
+ }
+}
+
+int valtodc(int val)
+{
+ assert(val>=0);
+
+ /* table 12/h.263 */
+ val/=8;
+ /* TODO: what to do for zero values? skip the block? */
+ if(val==0)
+ return 1;
+ if(val==128)
+ return 255;
+ if(val>254)
+ return 254;
+ return val;
+}
+
+void codehuffman(TAG*tag, struct huffcode*table, int index)
+{
+ /* TODO: !optimize! */
+ int i=0;
+ while(table[index].code[i]) {
+ if(table[index].code[i]=='0')
+ swf_SetBits(tag, 0, 1);
+ else
+ swf_SetBits(tag, 1, 1);
+ i++;
+ }
+}
+
+int see=0;
+
+void quantize(double*src, int*dest, int quant, int has_dc)
+{
+ int t,pos=0;
+ if(has_dc) {
+ dest[0] = (int)src[0]; /*DC*/
+ dest[0] = valtodc(dest[0]);
+ pos++;
+ }
+ for(t=pos;t<64;t++)
+ {
+ dest[t] = (int)src[t];
+ //val = (quant*(2*level+1)-1)+quant&1
+ if(quant&1) {
+ dest[t] = (dest[t]/quant - 1)/2;
+ } else {
+ dest[t] = ((dest[t]+1)/quant - 1)/2;
+ }
+ }
+}
+
+int hascoef(int*b, int has_dc)
+{
+ int t;
+ int pos=0;
+ int range=2;
+ if(has_dc)
+ pos++;
+ for(t=pos;t<64;t++) {
+ if(b[t]<=-range || b[t]>=range)
+ return 1;
+ }
+ return 0;
+}
+
+void encode8x8(TAG*tag, int*bb, int has_dc, int has_tcoef)
+{
+ int t;
+ int pos=0;
+
+ if(has_dc) {
+ swf_SetBits(tag, bb[0], 8);
+ pos++;
+ }
+
+ if(has_tcoef) {
+ int last;
+ /* determine last non-null coefficient */
+ for(last=63;last>=pos;last--) {
+ if(bb[last])
+ break;
+ }
+ assert(bb[last]);
+ /* blocks without coefficients should not be included
+ in the cbpy/cbpc patterns */
+ while(1) {
+ int run=0;
+ int level=0;
+ int islast=0;
+ int sign=0;
+ int t;
+ while(!bb[pos] && pos<last) {
+ pos++;
+ run++;
+ }
+ if(pos==last)
+ islast=1;
+ level=bb[pos];
+ if(level<0) {
+ level = -level;
+ sign = 1;
+ }
+ for(t=0;t<RLE_ESCAPE;t++) {
+ if(rle_params[t].run == run &&
+ rle_params[t].level == level &&
+ rle_params[t].last == islast) {
+ codehuffman(tag, rle, t);
+ swf_SetBits(tag, sign, 1);
+ break;
+ }
+ }
+ if(t==RLE_ESCAPE) {
+ codehuffman(tag, rle, RLE_ESCAPE);
+ /* table 14/h.263 */
+ assert(level);
+ if(level<-127) level = -127;
+ if(level>127) level = 127;
+
+ swf_SetBits(tag, islast, 1);
+ swf_SetBits(tag, run, 6);
+ swf_SetBits(tag, level, 8); //fixme
+ }
+
+ if(islast)
+ break;
+ pos++;
+ }
+
+ //codehuffman(tag, rle, 58);
+ //swf_SetBits(tag, 1, 1); //sign
+ }
+ see++;
+}
+
+void encode_blockI(TAG*tag, RGBA*pic, int bx, int by, int width, int height, int*quant)
+{
+ struct fblock_t b;
+ int dquant=0; /* TODO: should we take advantage of the dquant feature?*/
+ //int cbpcbits = 3;
+ //int cbpybits = 15;
+ int cbpcbits = 0;
+ int cbpybits = 0;
+ int y1[64],y2[64],y3[64],y4[64],u[64],v[64];
+
+ getregion(&b, pic, bx, by, width, height);
+ dct(b.y1); quantize(b.y1,y1,1,*quant); zigzag(y1); cbpybits|=hascoef(y1, 1)*8;
+ dct(b.y2); quantize(b.y2,y2,1,*quant); zigzag(y2); cbpybits|=hascoef(y2, 1)*4;
+ dct(b.y3); quantize(b.y3,y3,1,*quant); zigzag(y3); cbpybits|=hascoef(y3, 1)*2;
+ dct(b.y4); quantize(b.y4,y4,1,*quant); zigzag(y4); cbpybits|=hascoef(y4, 1)*1;
+ dct(b.u); quantize(b.u,u,1,*quant); zigzag(u); cbpcbits|=hascoef(u, 1)*2;
+ dct(b.v); quantize(b.v,v,1,*quant); zigzag(v); cbpcbits|=hascoef(v, 1)*1;
+
+ if(dquant) {
+ codehuffman(tag, mcbpc_intra, 4+cbpcbits);
+ } else {
+ codehuffman(tag, mcbpc_intra, 0+cbpcbits);
+ }
+ //swf_SetBits(tag, 1, 1); /*cbpc-00 mb_type=3 (no bquant), cbc=0*/
+
+ /* if this was an intra frame, we'd need to code (cbpybits^15) */
+ codehuffman(tag, cbpy, cbpybits);
+
+ if(dquant) {
+ /* 00 01 10 11
+ -1 -2 +1 +2
+ */
+ swf_SetBits(tag, 0x3, 2);
+ }
+
+ /* luminance */
+ encode8x8(tag, y1, 1, cbpybits&8);
+ encode8x8(tag, y2, 1, cbpybits&4);
+ encode8x8(tag, y3, 1, cbpybits&2);
+ encode8x8(tag, y4, 1, cbpybits&1);
+ /*swf_SetBits(tag, 0x1, 8);
+ swf_SetBits(tag, 0xfe, 8);
+ swf_SetBits(tag, 0x1, 8);
+ swf_SetBits(tag, 0x1, 8);*/
+
+ /* chrominance */
+ encode8x8(tag, u, 1, cbpcbits&2);
+ encode8x8(tag, v, 1, cbpcbits&1);
+ /*swf_SetBits(tag, 0xfe, 8);
+ swf_SetBits(tag, 0xfe, 8);*/
+}
+
+void swf_SetVideoStreamIFrame(TAG*tag, RGBA*pic, U16 width, U16 height, int frame)
+{
+ U32 i32;
+ int bx, by, bbx, bby;
+ int quant = 9;
+
+ width=width&~15; height=height&~15;
+
+ swf_SetU16(tag, frame);
+ swf_SetBits(tag, 1, 17); /* picture start code*/
+ swf_SetBits(tag, 0, 5); /* version=0, version 1 would optimize rle behaviour*/
+ swf_SetBits(tag, frame, 8); /* time reference */
+
+ /* write dimensions, taking advantage of some predefined sizes
+ if the opportunity presents itself */
+ i32 = width<<16|height;
+ switch(i32)
+ {
+ case 352<<16|288: swf_SetBits(tag, 2, 3);break;
+ case 176<<16|144: swf_SetBits(tag, 3, 3);break;
+ case 128<<16|96: swf_SetBits(tag, 4, 3);break;
+ case 320<<16|240: swf_SetBits(tag, 5, 3);break;
+ case 160<<16|120: swf_SetBits(tag, 6, 3);break;
+ default:
+ if(width>255 || height>255) {
+ swf_SetBits(tag, 1, 3);
+ swf_SetBits(tag, width, 16);
+ swf_SetBits(tag, height, 16);
+ } else {
+ swf_SetBits(tag, 0, 3);
+ swf_SetBits(tag, width, 8);
+ swf_SetBits(tag, height, 8);
+ }
+ }
+
+ swf_SetBits(tag, 0, 2); /* I-Frame */
+ swf_SetBits(tag, 0, 1); /* No deblock filter */
+ swf_SetBits(tag, quant, 5); /* quantizer (1-31), may be updated later on*/
+ swf_SetBits(tag, 0, 1); /* No extra info */
+
+ bbx = (width+15)/16;
+ bby = (height+15)/16;
+
+ for(by=0;by<bby;by++)
+ {
+ for(bx=0;bx<bbx;bx++)
+ {
+ encode_blockI(tag, pic, bx, by, width, height, &quant);
+ }
+ }
+}
+
+int main()
+{
+ int fi;
+ int t;
+ SWF swf;
+ TAG * tag;
+ RGBA* pic, rgb;
+ SWFPLACEOBJECT obj;
+ int width = 0;
+ int height = 0;
+ int frames = 1;
+ unsigned char*data;
+ char* fname = "/home/kramm/pics/lena.png";
+
+ getimage(fname, &width, &height, &data);
+ pic = (RGBA*)malloc(width*height*sizeof(RGBA));
+ memcpy(pic, data, width*height*sizeof(RGBA));
+ free(data);
+ printf("Compressing %s, size %dx%d\n", fname, width, height);
+
+ memset(&swf,0,sizeof(SWF));
+ memset(&obj,0,sizeof(obj));
+
+ swf.fileVersion = 6;
+ swf.frameRate = 29*256;
+ swf.movieSize.xmax = 20*width;
+ swf.movieSize.ymax = 20*height;
+
+ swf.firstTag = swf_InsertTag(NULL,ST_SETBACKGROUNDCOLOR);
+ tag = swf.firstTag;
+ rgb.r = 0x00;rgb.g = 0x00;rgb.b = 0x00;
+ swf_SetRGB(tag,&rgb);
+
+ tag = swf_InsertTag(tag, ST_DEFINEVIDEOSTREAM);
+ swf_SetU16(tag, 33);
+ swf_SetVideoStreamDefine(tag, frames, width, height);
+
+ for(t=0;t<frames;t++)
+ {
+ tag = swf_InsertTag(tag, ST_VIDEOFRAME);
+ swf_SetU16(tag, 33);
+ swf_SetVideoStreamIFrame(tag, pic, width, height, t);
+
+ tag = swf_InsertTag(tag, ST_PLACEOBJECT2);
+ swf_GetPlaceObject(0, &obj);
+ if(t==0) {
+ obj.depth = 1;
+ obj.id = 33;
+ } else {
+ obj.move = 1;
+ obj.depth = 1;
+ obj.ratio = t;
+ }
+ swf_SetPlaceObject(tag,&obj);
+
+ tag = swf_InsertTag(tag, ST_SHOWFRAME);
+ }
+
+ tag = swf_InsertTag(tag, ST_END);
+
+ fi = open("video3.swf", O_WRONLY|O_CREAT|O_TRUNC, 0644);
+ if(swf_WriteSWF(fi,&swf)<0) {
+ fprintf(stderr,"WriteSWF() failed.\n");
+ }
+ close(fi);
+ swf_FreeTags(&swf);
+}
git.asbjorn.biz / swftools.git / commitdiff