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authorpixel <pixel>2004-11-27 21:44:44 +0000
committerpixel <pixel>2004-11-27 21:44:44 +0000
commitd38e80ee04afe582e70150d3884e56c05f3fd7a8 (patch)
treef2627c50fa22aea89447e8406ac418eb68650d3d /psxdev/bs.c
parent50f0dd331f8168fb5b2cd60c70178fad627b7fb6 (diff)
Large dos2unix commit...
Diffstat (limited to 'psxdev/bs.c')
-rw-r--r--psxdev/bs.c698
1 files changed, 349 insertions, 349 deletions
diff --git a/psxdev/bs.c b/psxdev/bs.c
index e7c3526..a79a877 100644
--- a/psxdev/bs.c
+++ b/psxdev/bs.c
@@ -1,349 +1,349 @@
-/*
- (c)2000 by BERO bero@geocities.co.jp
-
- under GPL
-
- some changes by dbalster@psxdev.de
-
- - all globals now in a context (to use it as shlib)
- - removed debugging printfs
-*/
-
-typedef struct {
-/* bit i/o */
- unsigned int bitbuf;
- int bitcount,bs_size,totalbit;
- unsigned short *bsbuf;
-/* huffman */
- int last_dc[3];
- int _type;
- int rlsize;
- const unsigned char *iqtab;
-} bs_context_t;
-
-#include <stdlib.h>
-#include "bs.h"
-#include "common.h"
-
-/* static const char *copyright = N_("Copyright (C) 2000 by Daniel Balster <dbalster@psxdev.de>"); */
-
-enum {B,G,R};
-typedef int BLOCK;
-
-#define DCTSIZE2 64
-#define RGB2Y(r,g,b) ( 0.299*(r) + 0.587*(g) + 0.114*(b) )
-#define RGB2Cb(r,g,b) ( -0.16874*(r) - 0.33126*(g) +0.5*(b) )
-#define RGB2Cr(r,g,b) ( 0.5*(r) - 0.41869*(g) - 0.08131*(b) )
-
-/*
-16x16 RGB -> 8x8 Cb,Cr,Y0,Y1,Y2,Y3
-
-[Y0][Y1] [Cb] [Cr]
-[Y2][Y3]
-*/
-#define Cb 0
-#define Cr DCTSIZE2
-
-static void rgb2yuv (unsigned char image[][3], BLOCK *blk)
-{
- int x,y,i;
- int tmpblk[16*16][3],(*yuv)[3];
- BLOCK *yblk;
-
- yuv=tmpblk;
- for(i=0;i<16*16;i++) {
- yuv[0][0] = RGB2Y (image[0][R],image[0][G],image[0][B])-128;
- yuv[0][1] = RGB2Cb(image[0][R],image[0][G],image[0][B]);
- yuv[0][2] = RGB2Cr(image[0][R],image[0][G],image[0][B]);
- yuv++; image++;
- }
-
- yuv = tmpblk;
- yblk = blk+DCTSIZE2*2;
- for(y=0;y<16;y+=2,blk+=4,yblk+=8,yuv+=8+16) {
- if (y==8) yblk+=DCTSIZE2;
- for(x=0;x<4;x++,blk++,yblk+=2,yuv+=2) {
- blk[Cb] = (yuv[0][1]+yuv[1][1]+yuv[16][1]+yuv[17][1])/4;
- blk[Cr] = (yuv[0][2]+yuv[1][2]+yuv[16][2]+yuv[17][2])/4;
- yblk[0] = yuv[ 0][0];
- yblk[1] = yuv[ 1][0];
- yblk[8] = yuv[16][0];
- yblk[9] = yuv[17][0];
-
- blk[4+Cb] = (yuv[8+0][1]+yuv[8+1][1]+yuv[8+16][1]+yuv[8+17][1])/4;
- blk[4+Cr] = (yuv[8+0][2]+yuv[8+1][2]+yuv[8+16][2]+yuv[8+17][2])/4;
- yblk[DCTSIZE2+0] = yuv[8+ 0][0];
- yblk[DCTSIZE2+1] = yuv[8+ 1][0];
- yblk[DCTSIZE2+8] = yuv[8+16][0];
- yblk[DCTSIZE2+9] = yuv[8+17][0];
- }
- }
-}
-
-#undef Cb
-#undef Cr
-
-/* bit i/o */
-#define BITBUFSIZE 16
-#define WriteWord(x) ctxt->bsbuf[ctxt->bs_size++]=(x)
-
-static void putbits_init (bs_context_t *ctxt)
-{
- ctxt->bitbuf = 0;
- ctxt->bitcount = BITBUFSIZE;
- ctxt->bs_size = 0;
- ctxt->totalbit = 0;
-}
-
-static void putbits_flush (bs_context_t *ctxt)
-{
- WriteWord(ctxt->bitbuf);
-}
-
-static void putbits (bs_context_t *ctxt, unsigned int x, unsigned int n)
-{
- ctxt->totalbit+=n;
-
- if (n<ctxt->bitcount) {
- ctxt->bitcount-=n;
- ctxt->bitbuf |= x << ctxt->bitcount;
- } else {
- n-=ctxt->bitcount;
- WriteWord(ctxt->bitbuf | (x>>n) );
- if (n<BITBUFSIZE) {
- ctxt->bitcount = BITBUFSIZE-n;
- } else {
- WriteWord( x>>(n-BITBUFSIZE) );
- ctxt->bitcount = BITBUFSIZE*2-n;
- }
- ctxt->bitbuf = x << ctxt->bitcount;
- }
-}
-
-typedef struct {
- unsigned int code,nbits;
-} huff_t;
-
-const static huff_t dc_y_table[] = {
- {4,3},{0,2},{1,2},{5,3},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8}
-};
-
-const static huff_t dc_c_table[] = {
- {0,2},{1,2},{2,2},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8},{510,9}
-};
-
-#include "table.h"
-
-static void encode_init (bs_context_t *ctxt, void *outbuf, int type, int q_scale)
-{
- ctxt->_type = type;
- ctxt->last_dc[0] = 0;
- ctxt->last_dc[1] = 0;
- ctxt->last_dc[2] = 0;
- ctxt->rlsize = 0;
- putbits_init(ctxt);
-
- ctxt->bsbuf = outbuf;
- ctxt->bsbuf[1] = 0x3800;
- ctxt->bsbuf[2] = q_scale;
- ctxt->bsbuf[3] = type;
- ctxt->bs_size+=4;
-}
-
-static void encode_finish (bs_context_t *ctxt)
-{
- putbits_flush(ctxt);
- ctxt->bsbuf[0] = (((ctxt->rlsize+1)/2)+31)&~31;
-}
-
-static void encode_dc (bs_context_t *ctxt, int n, int level)
-{
- if (ctxt->_type==2) {
- putbits(ctxt,level&0x3ff,10);
- } else {
- const huff_t *table;
- int prev,cnt;
-
- level = level/4;
- if (n<2) {
- table = dc_c_table;
- prev = ctxt->last_dc[n];
- ctxt->last_dc[n] = level;
- } else {
- table = dc_y_table;
- prev = ctxt->last_dc[2];
- ctxt->last_dc[2] = level;
- }
- level -= prev;
- if (level==0) cnt=0;
- else {
- int alevel = level;
- if (alevel<0) alevel=-alevel;
- for(cnt=8;(alevel>>cnt)==0;cnt--);
- cnt++;
- if (level<0) level--;
- }
- putbits(ctxt,table[cnt].code,table[cnt].nbits);
- if (cnt) putbits(ctxt,level&((1<<cnt)-1),cnt);
- }
- ctxt->rlsize++;
-}
-
-static void encode_ac (bs_context_t *ctxt, int run, int level)
-{
- int abslevel,sign;
- if (level>0) {
- abslevel = level;
- sign = 0;
- } else {
- abslevel = -level;
- sign = 1;
- }
- if (run<=31 && abslevel<=maxlevel[run]) {
- putbits(ctxt,huff_table[run][abslevel-1].code+sign,huff_table[run][abslevel-1].nbits);
- } else {
- /* ESCAPE */
- putbits(ctxt,1,6);
- putbits(ctxt,(run<<10)+(level&0x3ff),16);
- }
- ctxt->rlsize++;
-}
-
-static void encode_eob (bs_context_t *ctxt)
-{
- putbits(ctxt, 2,2);
- ctxt->rlsize++;
-}
-
-extern void DCT(BLOCK *blk);
-
-unsigned char zscan[DCTSIZE2] = {
- 0 ,1 ,8 ,16,9 ,2 ,3 ,10,
- 17,24,32,25,18,11,4 ,5 ,
- 12,19,26,33,40,48,41,34,
- 27,20,13,6 ,7 ,14,21,28,
- 35,42,49,56,57,50,43,36,
- 29,22,15,23,30,37,44,51,
- 58,59,52,45,38,31,39,46,
- 53,60,61,54,47,55,62,63
-};
-
-static unsigned char xxx_iqtab[DCTSIZE2] = {
- 2,16,19,22,26,27,29,34,
- 16,16,22,24,27,29,34,37,
- 19,22,26,27,29,34,34,38,
- 22,22,26,27,29,34,37,40,
- 22,26,27,29,32,35,40,48,
- 26,27,29,32,35,40,48,58,
- 26,27,29,34,38,46,56,69,
- 27,29,35,38,46,56,69,83
-};
-
-const unsigned char *bs_iqtab (void) { return xxx_iqtab; }
-
-static void blk2huff (bs_context_t *ctxt,BLOCK *blk,int q_scale)
-{
- int i,k,run,level;
- for(i=0;i<6;i++) {
- DCT(blk);
- for(k=0;k<DCTSIZE2;k++) blk[k]>>=3;
- level = blk[0]/ctxt->iqtab[0];
- encode_dc(ctxt,i,level);
- run = 0;
- for(k=1;k<64;k++) {
- level = blk[zscan[k]]*8/(ctxt->iqtab[zscan[k]]*q_scale);
- if (level==0) {
- run++;
- } else {
- encode_ac(ctxt,run,level);
- run=0;
- }
- }
- encode_eob(ctxt);
- blk+=DCTSIZE2;
- }
-}
-
-Uint8 bs_roundtbl[256*3];
-
-void bs_init (void)
-{
- int i;
- for(i=0;i<256;i++) {
- bs_roundtbl [i]=0;
- bs_roundtbl [i+256]=i;
- bs_roundtbl [i+512]=255;
- }
-}
-
-int bs_encode (bs_header_t *outbuf,bs_input_image_t *img,int type,int q_scale,
- const unsigned char *myiqtab)
-{
- unsigned char image[16][16][3];
- BLOCK blk[6][DCTSIZE2];
- bs_context_t *ctxt = malloc(sizeof(bs_context_t));
-
- int x,y,xw,yw,rl;
-
- ctxt->iqtab = myiqtab ? myiqtab : bs_iqtab();
-
- encode_init (ctxt,outbuf,type,q_scale);
-
- for(x=0;x<img->width;x+=16) {
- xw = img->width-x; if (xw>16) xw = 16;
- for(y=0;y<img->height;y+=16) {
- unsigned char *p0 = img->top + x*(img->bit)/8 + y*img->nextline;
- int i,j=0;
- yw = img->height-y; if (yw>16) yw = 16;
-
- /* get 16x16 image */
-
- for(i=0;i<yw;i++) {
- unsigned char *p = p0;
- p0+=img->nextline;
- switch(img->bit) {
- case 16:
- for(j=0;j<xw;j++) {
- int c = *(unsigned short*)p;
- image[i][j][B] = ((c>>10)&31)*8;
- image[i][j][G] = ((c>>5)&31)*8;
- image[i][j][R] = ((c&31))*8;
- p+=2;
- }
- break;
- case 24:
- for(j=0;j<xw;j++) {
- image[i][j][R] = p[R];
- image[i][j][G] = p[G];
- image[i][j][B] = p[B];
- p+=3;
- }
- break;
- }
- for(;j<16;j++) {
- image[i][j][R] = image[i][xw-1][R];
- image[i][j][G] = image[i][xw-1][G];
- image[i][j][B] = image[i][xw-1][B];
- }
- }
-
- for(;i<16;i++) {
- for(j=0;j<16;j++) {
- image[i][j][R] = image[yw-1][j][R];
- image[i][j][G] = image[yw-1][j][G];
- image[i][j][B] = image[yw-1][j][B];
- }
- }
-
- rgb2yuv(image[0],blk[0]);
- blk2huff(ctxt,blk[0],q_scale);
- }
- }
-
- encode_finish(ctxt);
-
- rl = (ctxt->bs_size * 2);
- free (ctxt);
-
- return rl;
-}
+/*
+ (c)2000 by BERO bero@geocities.co.jp
+
+ under GPL
+
+ some changes by dbalster@psxdev.de
+
+ - all globals now in a context (to use it as shlib)
+ - removed debugging printfs
+*/
+
+typedef struct {
+/* bit i/o */
+ unsigned int bitbuf;
+ int bitcount,bs_size,totalbit;
+ unsigned short *bsbuf;
+/* huffman */
+ int last_dc[3];
+ int _type;
+ int rlsize;
+ const unsigned char *iqtab;
+} bs_context_t;
+
+#include <stdlib.h>
+#include "bs.h"
+#include "common.h"
+
+/* static const char *copyright = N_("Copyright (C) 2000 by Daniel Balster <dbalster@psxdev.de>"); */
+
+enum {B,G,R};
+typedef int BLOCK;
+
+#define DCTSIZE2 64
+#define RGB2Y(r,g,b) ( 0.299*(r) + 0.587*(g) + 0.114*(b) )
+#define RGB2Cb(r,g,b) ( -0.16874*(r) - 0.33126*(g) +0.5*(b) )
+#define RGB2Cr(r,g,b) ( 0.5*(r) - 0.41869*(g) - 0.08131*(b) )
+
+/*
+16x16 RGB -> 8x8 Cb,Cr,Y0,Y1,Y2,Y3
+
+[Y0][Y1] [Cb] [Cr]
+[Y2][Y3]
+*/
+#define Cb 0
+#define Cr DCTSIZE2
+
+static void rgb2yuv (unsigned char image[][3], BLOCK *blk)
+{
+ int x,y,i;
+ int tmpblk[16*16][3],(*yuv)[3];
+ BLOCK *yblk;
+
+ yuv=tmpblk;
+ for(i=0;i<16*16;i++) {
+ yuv[0][0] = RGB2Y (image[0][R],image[0][G],image[0][B])-128;
+ yuv[0][1] = RGB2Cb(image[0][R],image[0][G],image[0][B]);
+ yuv[0][2] = RGB2Cr(image[0][R],image[0][G],image[0][B]);
+ yuv++; image++;
+ }
+
+ yuv = tmpblk;
+ yblk = blk+DCTSIZE2*2;
+ for(y=0;y<16;y+=2,blk+=4,yblk+=8,yuv+=8+16) {
+ if (y==8) yblk+=DCTSIZE2;
+ for(x=0;x<4;x++,blk++,yblk+=2,yuv+=2) {
+ blk[Cb] = (yuv[0][1]+yuv[1][1]+yuv[16][1]+yuv[17][1])/4;
+ blk[Cr] = (yuv[0][2]+yuv[1][2]+yuv[16][2]+yuv[17][2])/4;
+ yblk[0] = yuv[ 0][0];
+ yblk[1] = yuv[ 1][0];
+ yblk[8] = yuv[16][0];
+ yblk[9] = yuv[17][0];
+
+ blk[4+Cb] = (yuv[8+0][1]+yuv[8+1][1]+yuv[8+16][1]+yuv[8+17][1])/4;
+ blk[4+Cr] = (yuv[8+0][2]+yuv[8+1][2]+yuv[8+16][2]+yuv[8+17][2])/4;
+ yblk[DCTSIZE2+0] = yuv[8+ 0][0];
+ yblk[DCTSIZE2+1] = yuv[8+ 1][0];
+ yblk[DCTSIZE2+8] = yuv[8+16][0];
+ yblk[DCTSIZE2+9] = yuv[8+17][0];
+ }
+ }
+}
+
+#undef Cb
+#undef Cr
+
+/* bit i/o */
+#define BITBUFSIZE 16
+#define WriteWord(x) ctxt->bsbuf[ctxt->bs_size++]=(x)
+
+static void putbits_init (bs_context_t *ctxt)
+{
+ ctxt->bitbuf = 0;
+ ctxt->bitcount = BITBUFSIZE;
+ ctxt->bs_size = 0;
+ ctxt->totalbit = 0;
+}
+
+static void putbits_flush (bs_context_t *ctxt)
+{
+ WriteWord(ctxt->bitbuf);
+}
+
+static void putbits (bs_context_t *ctxt, unsigned int x, unsigned int n)
+{
+ ctxt->totalbit+=n;
+
+ if (n<ctxt->bitcount) {
+ ctxt->bitcount-=n;
+ ctxt->bitbuf |= x << ctxt->bitcount;
+ } else {
+ n-=ctxt->bitcount;
+ WriteWord(ctxt->bitbuf | (x>>n) );
+ if (n<BITBUFSIZE) {
+ ctxt->bitcount = BITBUFSIZE-n;
+ } else {
+ WriteWord( x>>(n-BITBUFSIZE) );
+ ctxt->bitcount = BITBUFSIZE*2-n;
+ }
+ ctxt->bitbuf = x << ctxt->bitcount;
+ }
+}
+
+typedef struct {
+ unsigned int code,nbits;
+} huff_t;
+
+const static huff_t dc_y_table[] = {
+ {4,3},{0,2},{1,2},{5,3},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8}
+};
+
+const static huff_t dc_c_table[] = {
+ {0,2},{1,2},{2,2},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8},{510,9}
+};
+
+#include "table.h"
+
+static void encode_init (bs_context_t *ctxt, void *outbuf, int type, int q_scale)
+{
+ ctxt->_type = type;
+ ctxt->last_dc[0] = 0;
+ ctxt->last_dc[1] = 0;
+ ctxt->last_dc[2] = 0;
+ ctxt->rlsize = 0;
+ putbits_init(ctxt);
+
+ ctxt->bsbuf = outbuf;
+ ctxt->bsbuf[1] = 0x3800;
+ ctxt->bsbuf[2] = q_scale;
+ ctxt->bsbuf[3] = type;
+ ctxt->bs_size+=4;
+}
+
+static void encode_finish (bs_context_t *ctxt)
+{
+ putbits_flush(ctxt);
+ ctxt->bsbuf[0] = (((ctxt->rlsize+1)/2)+31)&~31;
+}
+
+static void encode_dc (bs_context_t *ctxt, int n, int level)
+{
+ if (ctxt->_type==2) {
+ putbits(ctxt,level&0x3ff,10);
+ } else {
+ const huff_t *table;
+ int prev,cnt;
+
+ level = level/4;
+ if (n<2) {
+ table = dc_c_table;
+ prev = ctxt->last_dc[n];
+ ctxt->last_dc[n] = level;
+ } else {
+ table = dc_y_table;
+ prev = ctxt->last_dc[2];
+ ctxt->last_dc[2] = level;
+ }
+ level -= prev;
+ if (level==0) cnt=0;
+ else {
+ int alevel = level;
+ if (alevel<0) alevel=-alevel;
+ for(cnt=8;(alevel>>cnt)==0;cnt--);
+ cnt++;
+ if (level<0) level--;
+ }
+ putbits(ctxt,table[cnt].code,table[cnt].nbits);
+ if (cnt) putbits(ctxt,level&((1<<cnt)-1),cnt);
+ }
+ ctxt->rlsize++;
+}
+
+static void encode_ac (bs_context_t *ctxt, int run, int level)
+{
+ int abslevel,sign;
+ if (level>0) {
+ abslevel = level;
+ sign = 0;
+ } else {
+ abslevel = -level;
+ sign = 1;
+ }
+ if (run<=31 && abslevel<=maxlevel[run]) {
+ putbits(ctxt,huff_table[run][abslevel-1].code+sign,huff_table[run][abslevel-1].nbits);
+ } else {
+ /* ESCAPE */
+ putbits(ctxt,1,6);
+ putbits(ctxt,(run<<10)+(level&0x3ff),16);
+ }
+ ctxt->rlsize++;
+}
+
+static void encode_eob (bs_context_t *ctxt)
+{
+ putbits(ctxt, 2,2);
+ ctxt->rlsize++;
+}
+
+extern void DCT(BLOCK *blk);
+
+unsigned char zscan[DCTSIZE2] = {
+ 0 ,1 ,8 ,16,9 ,2 ,3 ,10,
+ 17,24,32,25,18,11,4 ,5 ,
+ 12,19,26,33,40,48,41,34,
+ 27,20,13,6 ,7 ,14,21,28,
+ 35,42,49,56,57,50,43,36,
+ 29,22,15,23,30,37,44,51,
+ 58,59,52,45,38,31,39,46,
+ 53,60,61,54,47,55,62,63
+};
+
+static unsigned char xxx_iqtab[DCTSIZE2] = {
+ 2,16,19,22,26,27,29,34,
+ 16,16,22,24,27,29,34,37,
+ 19,22,26,27,29,34,34,38,
+ 22,22,26,27,29,34,37,40,
+ 22,26,27,29,32,35,40,48,
+ 26,27,29,32,35,40,48,58,
+ 26,27,29,34,38,46,56,69,
+ 27,29,35,38,46,56,69,83
+};
+
+const unsigned char *bs_iqtab (void) { return xxx_iqtab; }
+
+static void blk2huff (bs_context_t *ctxt,BLOCK *blk,int q_scale)
+{
+ int i,k,run,level;
+ for(i=0;i<6;i++) {
+ DCT(blk);
+ for(k=0;k<DCTSIZE2;k++) blk[k]>>=3;
+ level = blk[0]/ctxt->iqtab[0];
+ encode_dc(ctxt,i,level);
+ run = 0;
+ for(k=1;k<64;k++) {
+ level = blk[zscan[k]]*8/(ctxt->iqtab[zscan[k]]*q_scale);
+ if (level==0) {
+ run++;
+ } else {
+ encode_ac(ctxt,run,level);
+ run=0;
+ }
+ }
+ encode_eob(ctxt);
+ blk+=DCTSIZE2;
+ }
+}
+
+Uint8 bs_roundtbl[256*3];
+
+void bs_init (void)
+{
+ int i;
+ for(i=0;i<256;i++) {
+ bs_roundtbl [i]=0;
+ bs_roundtbl [i+256]=i;
+ bs_roundtbl [i+512]=255;
+ }
+}
+
+int bs_encode (bs_header_t *outbuf,bs_input_image_t *img,int type,int q_scale,
+ const unsigned char *myiqtab)
+{
+ unsigned char image[16][16][3];
+ BLOCK blk[6][DCTSIZE2];
+ bs_context_t *ctxt = malloc(sizeof(bs_context_t));
+
+ int x,y,xw,yw,rl;
+
+ ctxt->iqtab = myiqtab ? myiqtab : bs_iqtab();
+
+ encode_init (ctxt,outbuf,type,q_scale);
+
+ for(x=0;x<img->width;x+=16) {
+ xw = img->width-x; if (xw>16) xw = 16;
+ for(y=0;y<img->height;y+=16) {
+ unsigned char *p0 = img->top + x*(img->bit)/8 + y*img->nextline;
+ int i,j=0;
+ yw = img->height-y; if (yw>16) yw = 16;
+
+ /* get 16x16 image */
+
+ for(i=0;i<yw;i++) {
+ unsigned char *p = p0;
+ p0+=img->nextline;
+ switch(img->bit) {
+ case 16:
+ for(j=0;j<xw;j++) {
+ int c = *(unsigned short*)p;
+ image[i][j][B] = ((c>>10)&31)*8;
+ image[i][j][G] = ((c>>5)&31)*8;
+ image[i][j][R] = ((c&31))*8;
+ p+=2;
+ }
+ break;
+ case 24:
+ for(j=0;j<xw;j++) {
+ image[i][j][R] = p[R];
+ image[i][j][G] = p[G];
+ image[i][j][B] = p[B];
+ p+=3;
+ }
+ break;
+ }
+ for(;j<16;j++) {
+ image[i][j][R] = image[i][xw-1][R];
+ image[i][j][G] = image[i][xw-1][G];
+ image[i][j][B] = image[i][xw-1][B];
+ }
+ }
+
+ for(;i<16;i++) {
+ for(j=0;j<16;j++) {
+ image[i][j][R] = image[yw-1][j][R];
+ image[i][j][G] = image[yw-1][j][G];
+ image[i][j][B] = image[yw-1][j][B];
+ }
+ }
+
+ rgb2yuv(image[0],blk[0]);
+ blk2huff(ctxt,blk[0],q_scale);
+ }
+ }
+
+ encode_finish(ctxt);
+
+ rl = (ctxt->bs_size * 2);
+ free (ctxt);
+
+ return rl;
+}