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authorPixel <Pixel>2002-06-23 11:19:06 +0000
committerPixel <Pixel>2002-06-23 11:19:06 +0000
commit54c77d2cb0f734615febdb3cb33548bf4cd6e953 (patch)
treec6105e4984b0c29f2db05352234e5fbed6a1d092
parentcdbb43ea328883261c6f71e6e44b16ae39173fa6 (diff)
Pfiou, huge work...
Diffstat
-rw-r--r--FAQ-cd.txt51
-rwxr-xr-xMakefile10
-rw-r--r--generic.h27
-rw-r--r--psxdev/Makefile9
-rw-r--r--psxdev/bs.c697
-rw-r--r--psxdev/bs.h32
-rw-r--r--psxdev/idctfst.c56
-rw-r--r--psxdev/jfdctint.c24
-rw-r--r--psxdev/table.h204
-rw-r--r--psxdev/vlc.c1208
-rw-r--r--psxdev/xadecode.c301
-rw-r--r--psxdev/xadecode.h82
-rw-r--r--str-util.cpp96
13 files changed, 1668 insertions, 1129 deletions
diff --git a/FAQ-cd.txt b/FAQ-cd.txt
index 8259372..e3b630e 100644
--- a/FAQ-cd.txt
+++ b/FAQ-cd.txt
@@ -194,18 +194,53 @@ int is_valid_BCD(uchar x) {return (((x & 15) < 10) && ((x >> 4) < 10));}
5: Form 2
6: Real Time (RT)
7: End of File (EOF)
- but it seems it's not very accurate, as you will se below.
Of course, the PSX has the CDs in MODE 2... So the common files are
stored in MODE 2 FORM 1, the STR/XA files are stored in "MODE 2" but
actually they are in MODE 2 FORM 1/2. The MOVCONV tool will in fact produce
- files that does contain the subheaders. And those subheaders seems to
- contain a CN equals to 1, and the flags RT and Data are activated for the
- video frames, and FN, CN, and CI equal to 1, and the flags are placed
- as it: RT, Form 2, Audio for Audio streams. So the Video frames are in
- plain Form 1, and the Audio frames are in plain Form 2. But it _seems_ the
- Video frames are not checked against ECC/EDC, but filled with zeros
- instead.
+ files that does contain the subheaders.
+
+ Those subheaders are very likely to vary, and seems to be very important for
+ stream processing. Please note that "str" video sectors are considered as
+ data sectors, and not as video sectors.
+
+ The CN byte indicates the channel number of the current sector. The XA
+ format may contain interlaced channels. So for example, if you have a
+ file that does contain 8 channels, you will have first the first sector
+ of the channel 0, then the first sector of the channel 1, etc...
+
+ This is also a bit more difficult when you know that video is also
+ interlaced and considered as a channel itself. The common interlacement
+ is 7 video sectors for 1 audio sector, but this may vary. And all the
+ channels may be completely independants. For example, you may have a
+ sound-free video that does contain an audio channel, this audio channel
+ may be used for another part in the game.
+
+ This is to optimize the reading process. Since the cd reader is a 2x cd
+ reader, it *HAS* to read data in full 300KBps. So, if you have a sound
+ free video, the reading process will be faster than the decoding process,
+ and everything will crash. This is about the same for the audio sectors.
+ The 'leap' sector function of MOVCONV does add blank sectors in order to
+ pad the channels that may have stopped before the others.
+
+ One "speed" of the CD reader corresponds to four time the playback speed
+ of a stereo audio channel at 37800Hz. So at full speed you can have eight
+ stereo audio channels at 37800Hz. Or you can have 32 mono audio channels
+ at 18900Hz.
+
+ Common video str files needs 7/8 of the full speed of the CD reader.
+ "Common" means 320x224 videos at 15fps. So you can have a full movie
+ in 320x224x15fps with a stereo sound track at 37800hz. So, now, you
+ may understand why the common interlacement may vary.
+
+ The CI byte does contains some flags about the current sector, but I'm
+ yet unable to give a full description of them. I've only got this: for
+ audio frames, the bit 0 is set when you have stereo sound, and the bit 2
+ is set when you have "half frequency", ie 18900Hz instead of 37800Hz.
+
+ The Video frames are in plain Form 1, and the Audio frames are in plain
+ Form 2. But it _seems_ the Video frames are not checked against ECC/EDC,
+ and filled with zeros instead.
The last but not the least: the MODE 2 FORM 1 and MODE 2 FORM 2 are also
called XA-Mode1 and XA-Mode2 or simplier: XA-1 and XA-2.
diff --git a/Makefile b/Makefile
index 6f57c0e..a8c788e 100755
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@ TARGET = lzss dlzss cd-tool str-tool
all: subdirs ${TARGET}
subdirs:
- for d in ${SUBDIRS} ; do (cd $$d ; make all) ; done
+ for d in ${SUBDIRS} ; do make -C $$d ; done
lzss: lzss.o lzss.h generic.o generic.h fileutils.h fileutils.o lzss-main.o
${CXX} ${LDFLAGS} -DLZSS_MAIN lzss.o generic.o fileutils.o lzss-main.o -o lzss
@@ -18,16 +18,16 @@ dlzss: lzss
ln -fs lzss dlzss
yazedc: yazedc.o crctables crctable.out yazedc-main.o
- ${CXX} ${CPPFLAGS} ${LDFLAGS} yazedc.o yazedc-main.o -DMAIN -o yazedc
+ ${CXX} ${LDFLAGS} yazedc.o yazedc-main.o -DMAIN -o yazedc
cd-tool: cd-tool.o cdutils.o cdutils.h fileutils.o fileutils.h generic.o generic.h yazedc.o yazedc.h
- ${CXX} ${oFLAGS} ${LDFLAGAS} cd-tool.o cdutils.o fileutils.o yazedc.o generic.o -o cd-tool
+ ${CXX} ${LDFLAGAS} cd-tool.o cdutils.o fileutils.o yazedc.o generic.o -o cd-tool
dte-tool: dteutils.o generic.h generic.o fileutils.o fileutils.h dtemain.o
- ${CXX} ${oFLAGS} ${LDFLAGS} dteutils.o generic.o fileutils.o dtemain.o -o dte-tool
+ ${CXX} ${LDFLAGS} dteutils.o generic.o fileutils.o dtemain.o -o dte-tool
str-tool: str-util.o generic.h generic.o fileutils.o fileutils.h cdutils.o cdutils.h yazedc.o yazedc.h
- ${CXX} ${oFLAGS} ${LDFLAGS} str-util.o generic.o fileutils.o cdutils.o yazedc.o psxdev/bs.o psxdev/idctfst.o psxdev/jfdctint.o psxdev/vlc.o -o str-tool
+ ${CXX} ${LDFLAGS} str-util.o generic.o fileutils.o cdutils.o yazedc.o psxdev/bs.o psxdev/idctfst.o psxdev/jfdctint.o psxdev/vlc.o -o str-tool -lSDL
clean:
rm -f *.o ${TARGET} compil.c
diff --git a/generic.h b/generic.h
index 86dafaa..ee9bb0e 100644
--- a/generic.h
+++ b/generic.h
@@ -32,17 +32,42 @@
#define MIN(a,b) ((a)<(b)?(a):(b))
#define MAX(a,b) ((a)<(b)?(b):(a)
-
+/*
+#ifndef Uint32
typedef unsigned long int Uint32;
+#endif
+*/
+#ifndef int32
typedef signed long int int32;
+#endif
+
+#ifndef Uint16
typedef unsigned short int Uint16;
+#endif
+
+#ifndef int16
typedef signed short int int16;
+#endif
+
+#ifndef Uint8
typedef unsigned char Uint8;
+#endif
+
+#ifndef int8
typedef signed char int8;
+#endif
+#ifndef Byte
typedef Uint8 Byte;
+#endif
+
+#ifndef Word
typedef Uint16 Word;
+#endif
+
+#ifndef DWord
typedef Uint32 DWord;
+#endif
extern char verbosity;
void printm(int level, char * fmt, ...);
diff --git a/psxdev/Makefile b/psxdev/Makefile
index 3db2a0f..5cc33ca 100644
--- a/psxdev/Makefile
+++ b/psxdev/Makefile
@@ -1,10 +1,15 @@
-TARGETS=bs.o idctfst.o jfdctint.o vlc.o
+TARGETS=xadecode.o bs.o idctfst.o jfdctint.o vlc.o
CC=gcc
-CPPFLAGS=-march=i386 -O3
+CPPFLAGS=-Wall -g -O3 -mcpu=i686 -pedantic
+# -Werror
+# -pedantic-errors
all: $(TARGETS)
+bstoppm: xadecode.o bs.o idctfst.o jfdtint.o vlc.o bstoppm.o
+ ${CC} ${LDFLAGS} xadecode.o bs.o idcfst.o jfdtint.o vlc.o bstoppm.o -o bstoppm
+
clean:
rm -f *.o
diff --git a/psxdev/bs.c b/psxdev/bs.c
index 5d7e185..5823430 100644
--- a/psxdev/bs.c
+++ b/psxdev/bs.c
@@ -1,348 +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;
- unsigned char *iqtab;
-} bs_context_t;
-
-#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 char 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 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;
- }
-}
-
-u_char 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,
- 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) {
- 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((unsigned char*)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;
+ }
+}
+
+u_char 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;
+}
diff --git a/psxdev/bs.h b/psxdev/bs.h
index d8d9a6c..47a3762 100644
--- a/psxdev/bs.h
+++ b/psxdev/bs.h
@@ -1,4 +1,4 @@
-/* $Id: bs.h,v 1.1 2002-06-21 23:45:51 Pixel Exp $ */
+/* $Id: bs.h,v 1.2 2002-06-23 11:19:06 Pixel Exp $ */
/*
libbs - library for the bitstream image format
@@ -30,7 +30,9 @@
#ifndef __LIB_BS_H
#define __LIB_BS_H
+#ifndef _GNU_SOURCE
#define _GNU_SOURCE
+#endif
#include <sys/types.h>
#include <stdarg.h>
@@ -60,26 +62,26 @@ extern "C" {
void bs_init (void);
-int bs_encode ( // returns BS image size in bytes
- bs_header_t *outbuf, // output BS image
- bs_input_image_t *img, // input image descriptor
- int type, // image type (use BS_TYPE)
- int q_scale, // Q scaling factor (1=best,>= lower quality)
- unsigned char *myiqtab // provide own iqtab (NULL == default)
+int bs_encode ( /* returns BS image size in bytes */
+ bs_header_t *outbuf, /* output BS image */
+ bs_input_image_t *img, /* input image descriptor */
+ int type, /* image type (use BS_TYPE) */
+ int q_scale, /* Q scaling factor (1=best,>= lower quality) */
+ const unsigned char *myiqtab /* provide own iqtab (NULL == default) */
);
void bs_decode_rgb24 (
- unsigned char *outbuf, // output RGB bytes (width*height*3)
- bs_header_t *img, // input BS image
- int width, int height, // dimension of BS image
- unsigned char *myiqtab
+ unsigned char *outbuf, /* output RGB bytes (width*height*3) */
+ bs_header_t *img, /* input BS image */
+ int width, int height, /* dimension of BS image */
+ const unsigned char *myiqtab
);
void bs_decode_rgb15 (
- unsigned short *outbuf, // output RGB bytes (width*height*2)
- bs_header_t *img, // input BS image
- int width, int height, // dimension of BS image
- unsigned char *myiqtab
+ unsigned short *outbuf, /* output RGB bytes (width*height*2) */
+ bs_header_t *img, /* input BS image */
+ int width, int height, /* dimension of BS image */
+ const unsigned char *myiqtab
);
const unsigned char *bs_iqtab (void);
diff --git a/psxdev/idctfst.c b/psxdev/idctfst.c
index 22faae6..345cdb1 100644
--- a/psxdev/idctfst.c
+++ b/psxdev/idctfst.c
@@ -59,7 +59,7 @@
* machines, and may also reduce the cost of multiplication (since there
* are fewer one-bits in the constants).
*/
-
+
#define BITS_IN_JSAMPLE 8
#if BITS_IN_JSAMPLE == 8
@@ -108,7 +108,7 @@
* multiplication will do. For 12-bit data, the multiplier table is
* declared INT32, so a 32-bit multiply will be used.
*/
-
+
#if BITS_IN_JSAMPLE == 8
#define DEQUANTIZE(coef,quantval) (coef)
#else
@@ -121,24 +121,24 @@
* We assume that int right shift is unsigned if INT32 right shift is.
*/
-#define DESCALE(x,n) ((x)>>(n))
+#define DESCALE(x,n) ((x)>>(n))
#define RANGE(n) (n)
-#define BLOCK int
+#define BLOCK int
/*
* Perform dequantization and inverse DCT on one block of coefficients.
*/
-#define DCTSIZE 8
-#define DCTSIZE2 64
-
-static void IDCT1(BLOCK *block)
-{
+#define DCTSIZE 8
+#define DCTSIZE2 64
+
+static void IDCT1(BLOCK *block)
+{
int val = RANGE(DESCALE(block[0], PASS1_BITS+3));
- int i;
- for(i=0;i<DCTSIZE2;i++) block[i]=val;
-}
-
-void IDCT(BLOCK *block,int k)
+ int i;
+ for(i=0;i<DCTSIZE2;i++) block[i]=val;
+}
+
+void IDCT(BLOCK *block,int k)
{
int tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
int z5, z10, z11, z12, z13;
@@ -146,9 +146,9 @@ void IDCT(BLOCK *block,int k)
int i;
/* Pass 1: process columns from input, store into work array. */
- switch(k){
- case 1:IDCT1(block); return;
- }
+ switch(k){
+ case 1:IDCT1(block); return;
+ }
ptr = block;
for (i = 0; i< DCTSIZE; i++,ptr++) {
@@ -197,7 +197,7 @@ void IDCT(BLOCK *block,int k)
z11 = ptr[DCTSIZE*1] + ptr[DCTSIZE*7];
z12 = ptr[DCTSIZE*1] - ptr[DCTSIZE*7];
- z5 = MULTIPLY(z12 - z10, FIX_1_847759065);
+ z5 = MULTIPLY(z12 - z10, FIX_1_847759065);
tmp7 = z11 + z13; /* phase 5 */
tmp6 = MULTIPLY(z10, FIX_2_613125930) + z5 - tmp7; /* phase 2 */
tmp5 = MULTIPLY(z11 - z13, FIX_1_414213562) - tmp6;
@@ -232,14 +232,14 @@ void IDCT(BLOCK *block,int k)
if ((ptr[1] | ptr[2] | ptr[3] | ptr[4] | ptr[5] | ptr[6] |
ptr[7]) == 0) {
/* AC terms all zero */
- ptr[0] =
- ptr[1] =
- ptr[2] =
- ptr[3] =
- ptr[4] =
- ptr[5] =
- ptr[6] =
- ptr[7] =
+ ptr[0] =
+ ptr[1] =
+ ptr[2] =
+ ptr[3] =
+ ptr[4] =
+ ptr[5] =
+ ptr[6] =
+ ptr[7] =
RANGE(DESCALE(ptr[0], PASS1_BITS+3));;
continue;
@@ -247,7 +247,7 @@ void IDCT(BLOCK *block,int k)
#endif
/* Even part */
-
+
z10 = ptr[0] + ptr[4];
z11 = ptr[0] - ptr[4];
z13 = ptr[2] + ptr[6];
@@ -265,7 +265,7 @@ void IDCT(BLOCK *block,int k)
z11 = ptr[1] + ptr[7];
z12 = ptr[1] - ptr[7];
- z5 = MULTIPLY(z12 - z10, FIX_1_847759065);
+ z5 = MULTIPLY(z12 - z10, FIX_1_847759065);
tmp7 = z11 + z13; /* phase 5 */
tmp6 = MULTIPLY(z10, FIX_2_613125930) + z5 - tmp7; /* phase 2 */
tmp5 = MULTIPLY(z11 - z13, FIX_1_414213562) - tmp6;
diff --git a/psxdev/jfdctint.c b/psxdev/jfdctint.c
index 58bc2e4..f9299e1 100644
--- a/psxdev/jfdctint.c
+++ b/psxdev/jfdctint.c
@@ -23,19 +23,19 @@
* scaled fixed-point arithmetic, with a minimal number of shifts.
*/
-#define DCT_ISLOW_SUPPORTED
-#define DCTSIZE 8
-#define DCTELEM int
-#define INT32 int
+#define DCT_ISLOW_SUPPORTED
+#define DCTSIZE 8
+#define DCTELEM int
+#define INT32 int
#define DESCALE(x,n) RIGHT_SHIFT((x) + (1 << ((n)-1)), n)
-#define RIGHT_SHIFT(x,n) ((x)>>(n))
-#define GLOBAL
+#define RIGHT_SHIFT(x,n) ((x)>>(n))
+#define GLOBAL
#define jpeg_fdct_islow DCT
-#define SHIFT_TEMPS
-//#define BITS_IN_JSAMPLE 8
-//#define MULTIPLY16C16(var,const) ((var) * (const))
-
-
+#define SHIFT_TEMPS
+/* #define BITS_IN_JSAMPLE 8
+ #define MULTIPLY16C16(var,const) ((var) * (const)) */
+
+
#ifdef DCT_ISLOW_SUPPORTED
@@ -44,7 +44,7 @@
*/
#if DCTSIZE != 8
- Sorry, this code only copes with 8x8 DCTs. /* deliberate syntax err */
+#error Sorry, this code only copes with 8x8 DCTs.
#endif
diff --git a/psxdev/table.h b/psxdev/table.h
index 3e50b18..0b50ad3 100644
--- a/psxdev/table.h
+++ b/psxdev/table.h
@@ -1,102 +1,102 @@
-const static huff_t table0[]={
- {6,3},{8,5},{10,6},{12,8},{76,9},{66,9},{20,11},{58,13},{48,13},{38,13},{32,13},{52,14},{50,14},{48,14},{46,14},{62,15},{60,15},{58,15},{56,15},{54,15},{52,15},{50,15},{48,15},{46,15},{44,15},{42,15},{40,15},{38,15},{36,15},{34,15},{32,15},{48,16},{46,16},{44,16},{42,16},{40,16},{38,16},{36,16},{34,16},{32,16},
-};
-const static huff_t table1[]={
- {6,4},{12,7},{74,9},{24,11},{54,13},{44,14},{42,14},{62,16},{60,16},{58,16},{56,16},{54,16},{52,16},{50,16},{38,17},{36,17},{34,17},{32,17},
-};
-const static huff_t table2[]={
- {10,5},{8,8},{22,11},{40,13},{40,14},
-};
-const static huff_t table3[]={
- {14,6},{72,9},{56,13},{38,14},
-};
-const static huff_t table4[]={
- {12,6},{30,11},{36,13},
-};
-const static huff_t table5[]={
- {14,7},{18,11},{36,14},
-};
-const static huff_t table6[]={
- {10,7},{60,13},{40,17},
-};
-const static huff_t table7[]={
- {8,7},{42,13},
-};
-const static huff_t table8[]={
- {14,8},{34,13},
-};
-const static huff_t table9[]={
- {10,8},{34,14},
-};
-const static huff_t table10[]={
- {78,9},{32,14},
-};
-const static huff_t table11[]={
- {70,9},{52,17},
-};
-const static huff_t table12[]={
- {68,9},{50,17},
-};
-const static huff_t table13[]={
- {64,9},{48,17},
-};
-const static huff_t table14[]={
- {28,11},{46,17},
-};
-const static huff_t table15[]={
- {26,11},{44,17},
-};
-const static huff_t table16[]={
- {16,11},{42,17},
-};
-const static huff_t table17[]={
- {62,13},
-};
-const static huff_t table18[]={
- {52,13},
-};
-const static huff_t table19[]={
- {50,13},
-};
-const static huff_t table20[]={
- {46,13},
-};
-const static huff_t table21[]={
- {44,13},
-};
-const static huff_t table22[]={
- {62,14},
-};
-const static huff_t table23[]={
- {60,14},
-};
-const static huff_t table24[]={
- {58,14},
-};
-const static huff_t table25[]={
- {56,14},
-};
-const static huff_t table26[]={
- {54,14},
-};
-const static huff_t table27[]={
- {62,17},
-};
-const static huff_t table28[]={
- {60,17},
-};
-const static huff_t table29[]={
- {58,17},
-};
-const static huff_t table30[]={
- {56,17},
-};
-const static huff_t table31[]={
- {54,17},
-};
-const static huff_t *huff_table[]={
- table0,table1,table2,table3,table4,table5,table6,table7,table8,table9,table10,table11,table12,table13,table14,table15,table16,table17,table18,table19,table20,table21,table22,table23,table24,table25,table26,table27,table28,table29,table30,table31,
-};
-const static int maxlevel[]={
- 40,18,5,4,3,3,3,2,2,2,2,2,2,2,2,2,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
-};
+const static huff_t table0[]={
+ {6,3},{8,5},{10,6},{12,8},{76,9},{66,9},{20,11},{58,13},{48,13},{38,13},{32,13},{52,14},{50,14},{48,14},{46,14},{62,15},{60,15},{58,15},{56,15},{54,15},{52,15},{50,15},{48,15},{46,15},{44,15},{42,15},{40,15},{38,15},{36,15},{34,15},{32,15},{48,16},{46,16},{44,16},{42,16},{40,16},{38,16},{36,16},{34,16},{32,16},
+};
+const static huff_t table1[]={
+ {6,4},{12,7},{74,9},{24,11},{54,13},{44,14},{42,14},{62,16},{60,16},{58,16},{56,16},{54,16},{52,16},{50,16},{38,17},{36,17},{34,17},{32,17},
+};
+const static huff_t table2[]={
+ {10,5},{8,8},{22,11},{40,13},{40,14},
+};
+const static huff_t table3[]={
+ {14,6},{72,9},{56,13},{38,14},
+};
+const static huff_t table4[]={
+ {12,6},{30,11},{36,13},
+};
+const static huff_t table5[]={
+ {14,7},{18,11},{36,14},
+};
+const static huff_t table6[]={
+ {10,7},{60,13},{40,17},
+};
+const static huff_t table7[]={
+ {8,7},{42,13},
+};
+const static huff_t table8[]={
+ {14,8},{34,13},
+};
+const static huff_t table9[]={
+ {10,8},{34,14},
+};
+const static huff_t table10[]={
+ {78,9},{32,14},
+};
+const static huff_t table11[]={
+ {70,9},{52,17},
+};
+const static huff_t table12[]={
+ {68,9},{50,17},
+};
+const static huff_t table13[]={
+ {64,9},{48,17},
+};
+const static huff_t table14[]={
+ {28,11},{46,17},
+};
+const static huff_t table15[]={
+ {26,11},{44,17},
+};
+const static huff_t table16[]={
+ {16,11},{42,17},
+};
+const static huff_t table17[]={
+ {62,13},
+};
+const static huff_t table18[]={
+ {52,13},
+};
+const static huff_t table19[]={
+ {50,13},
+};
+const static huff_t table20[]={
+ {46,13},
+};
+const static huff_t table21[]={
+ {44,13},
+};
+const static huff_t table22[]={
+ {62,14},
+};
+const static huff_t table23[]={
+ {60,14},
+};
+const static huff_t table24[]={
+ {58,14},
+};
+const static huff_t table25[]={
+ {56,14},
+};
+const static huff_t table26[]={
+ {54,14},
+};
+const static huff_t table27[]={
+ {62,17},
+};
+const static huff_t table28[]={
+ {60,17},
+};
+const static huff_t table29[]={
+ {58,17},
+};
+const static huff_t table30[]={
+ {56,17},
+};
+const static huff_t table31[]={
+ {54,17},
+};
+const static huff_t *huff_table[]={
+ table0,table1,table2,table3,table4,table5,table6,table7,table8,table9,table10,table11,table12,table13,table14,table15,table16,table17,table18,table19,table20,table21,table22,table23,table24,table25,table26,table27,table28,table29,table30,table31,
+};
+const static int maxlevel[]={
+ 40,18,5,4,3,3,3,2,2,2,2,2,2,2,2,2,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+};
diff --git a/psxdev/vlc.c b/psxdev/vlc.c
index aa7e610..780dcf1 100644
--- a/psxdev/vlc.c
+++ b/psxdev/vlc.c
@@ -1,602 +1,606 @@
-#include "bs.h"
-#include <sys/types.h>
-
-#define SOFT
-
-#define CODE1(a,b,c) (((a)<<10)|((b)&0x3ff)|((c)<<16))
-/* run, level, bit */
-#define CODE(a,b,c) CODE1(a,b,c+1),CODE1(a,-b,c+1)
-#define CODE0(a,b,c) CODE1(a,b,c),CODE1(a,b,c)
-#define CODE2(a,b,c) CODE1(a,b,c+1),CODE1(a,b,c+1)
-#define RUNOF(a) ((a)>>10)
-#define VALOF(a) ((short)((a)<<6)>>6)
-#define BITOF(a) ((a)>>16)
-#define EOB 0xfe00
-#define ESCAPE_CODE CODE1(63,0,6)
-#define EOB_CODE CODE1(63,512,2)
-
-/*
- DC code
- Y U,V
-0 100 00 0
-1 00x 01x -1,1
-2 01xx 10xx -3,-2,2,3
-3 101xxx 110xxx -7..-4,4..7
-4 110xxxx 1110 -15..-8,8..15
-5 1110xxxxx 11110 -31..-16,16..31
-6 11110xxxxxx 111110 -63..-32,32..63
-7 111110 1111110 -127..-64,64..127
-8 1111110 11111110 -255..-128,128..255
- 7+8 8+8
-*/
-
-/*
- This table based on MPEG2DEC by MPEG Software Simulation Group
-*/
-
-/* Table B-14, DCT coefficients table zero,
-* codes 0100 ... 1xxx (used for all other coefficients)
-*/
-static const u_long VLCtabnext[12*2] = {
- CODE(0,2,4), CODE(2,1,4), CODE2(1,1,3), CODE2(1,-1,3),
- CODE0(63,512,2), CODE0(63,512,2), CODE0(63,512,2), CODE0(63,512,2), /*EOB*/
- CODE2(0,1,2), CODE2(0,1,2), CODE2(0,-1,2), CODE2(0,-1,2)
-};
-
-/* Table B-14, DCT coefficients table zero,
-* codes 000001xx ... 00111xxx
-*/
-static const u_long VLCtab0[60*2] = {
- CODE0(63,0,6), CODE0(63,0,6),CODE0(63,0,6), CODE0(63,0,6), /* ESCAPE */
- CODE2(2,2,7), CODE2(2,-2,7), CODE2(9,1,7), CODE2(9,-1,7),
- CODE2(0,4,7), CODE2(0,-4,7), CODE2(8,1,7), CODE2(8,-1,7),
- CODE2(7,1,6), CODE2(7,1,6), CODE2(7,-1,6), CODE2(7,-1,6),
- CODE2(6,1,6), CODE2(6,1,6), CODE2(6,-1,6), CODE2(6,-1,6),
- CODE2(1,2,6), CODE2(1,2,6), CODE2(1,-2,6), CODE2(1,-2,6),
- CODE2(5,1,6), CODE2(5,1,6), CODE2(5,-1,6), CODE2(5,-1,6),
- CODE(13,1,8), CODE(0,6,8), CODE(12,1,8), CODE(11,1,8),
- CODE(3,2,8), CODE(1,3,8), CODE(0,5,8), CODE(10,1,8),
- CODE2(0,3,5), CODE2(0,3,5), CODE2(0,3,5), CODE2(0,3,5),
- CODE2(0,-3,5), CODE2(0,-3,5), CODE2(0,-3,5), CODE2(0,-3,5),
- CODE2(4,1,5), CODE2(4,1,5), CODE2(4,1,5), CODE2(4,1,5),
- CODE2(4,-1,5), CODE2(4,-1,5), CODE2(4,-1,5), CODE2(4,-1,5),
- CODE2(3,1,5), CODE2(3,1,5), CODE2(3,1,5), CODE2(3,1,5),
- CODE2(3,-1,5), CODE2(3,-1,5), CODE2(3,-1,5), CODE2(3,-1,5)
-};
-
-/* Table B-14, DCT coefficients table zero,
-* codes 0000001000 ... 0000001111
-*/
-static const u_long VLCtab1[8*2] = {
- CODE(16,1,10), CODE(5,2,10), CODE(0,7,10), CODE(2,3,10),
- CODE(1,4,10), CODE(15,1,10), CODE(14,1,10), CODE(4,2,10)
-};
-
-/* Table B-14/15, DCT coefficients table zero / one,
-* codes 000000010000 ... 000000011111
-*/
-static const u_long VLCtab2[16*2] = {
- CODE(0,11,12), CODE(8,2,12), CODE(4,3,12), CODE(0,10,12),
- CODE(2,4,12), CODE(7,2,12), CODE(21,1,12), CODE(20,1,12),
- CODE(0,9,12), CODE(19,1,12), CODE(18,1,12), CODE(1,5,12),
- CODE(3,3,12), CODE(0,8,12), CODE(6,2,12), CODE(17,1,12)
-};
-
-/* Table B-14/15, DCT coefficients table zero / one,
-* codes 0000000010000 ... 0000000011111
-*/
-static const u_long VLCtab3[16*2] = {
- CODE(10,2,13), CODE(9,2,13), CODE(5,3,13), CODE(3,4,13),
- CODE(2,5,13), CODE(1,7,13), CODE(1,6,13), CODE(0,15,13),
- CODE(0,14,13), CODE(0,13,13), CODE(0,12,13), CODE(26,1,13),
- CODE(25,1,13), CODE(24,1,13), CODE(23,1,13), CODE(22,1,13)
-};
-
-/* Table B-14/15, DCT coefficients table zero / one,
-* codes 00000000010000 ... 00000000011111
-*/
-static const u_long VLCtab4[16*2] = {
- CODE(0,31,14), CODE(0,30,14), CODE(0,29,14), CODE(0,28,14),
- CODE(0,27,14), CODE(0,26,14), CODE(0,25,14), CODE(0,24,14),
- CODE(0,23,14), CODE(0,22,14), CODE(0,21,14), CODE(0,20,14),
- CODE(0,19,14), CODE(0,18,14), CODE(0,17,14), CODE(0,16,14)
-};
-
-/* Table B-14/15, DCT coefficients table zero / one,
-* codes 000000000010000 ... 000000000011111
-*/
-static const u_long VLCtab5[16*2] = {
- CODE(0,40,15), CODE(0,39,15), CODE(0,38,15), CODE(0,37,15),
- CODE(0,36,15), CODE(0,35,15), CODE(0,34,15), CODE(0,33,15),
- CODE(0,32,15), CODE(1,14,15), CODE(1,13,15), CODE(1,12,15),
- CODE(1,11,15), CODE(1,10,15), CODE(1,9,15), CODE(1,8,15)
-};
-
-/* Table B-14/15, DCT coefficients table zero / one,
-* codes 0000000000010000 ... 0000000000011111
-*/
-static const u_long VLCtab6[16*2] = {
- CODE(1,18,16), CODE(1,17,16), CODE(1,16,16), CODE(1,15,16),
- CODE(6,3,16), CODE(16,2,16), CODE(15,2,16), CODE(14,2,16),
- CODE(13,2,16), CODE(12,2,16), CODE(11,2,16), CODE(31,1,16),
- CODE(30,1,16), CODE(29,1,16), CODE(28,1,16), CODE(27,1,16)
-};
-
-/*
- DC code
- Y U,V
-0 100 00 0
-1 00x 01x -1,1
-2 01xx 10xx -3,-2,2,3
-3 101xxx 110xxx -7..-4,4..7
-4 110xxxx 1110xxxx -15..-8,8..15
-5 1110xxxxx 11110xxxxx -31..-16,16..31
-6 11110xxxxxx 111110xxxxxx -63..-32,32..63
-7 111110xxxxxxx 1111110xxxxxxx -127..-64,64..127
-8 1111110xxxxxxxx 11111110xxxxxxxx -255..-128,128..255
-*/
-
-static const u_long DC_Ytab0[48] = {
- CODE1(0,-1,3),CODE1(0,-1,3),CODE1(0,-1,3),CODE1(0,-1,3),
- CODE1(0,-1,3),CODE1(0,-1,3),CODE1(0,-1,3),CODE1(0,-1,3),
- CODE1(0,1,3),CODE1(0,1,3),CODE1(0,1,3),CODE1(0,1,3),
- CODE1(0,1,3),CODE1(0,1,3),CODE1(0,1,3),CODE1(0,1,3),
-
- CODE1(0,-3,4),CODE1(0,-3,4),CODE1(0,-3,4),CODE1(0,-3,4),
- CODE1(0,-2,4),CODE1(0,-2,4),CODE1(0,-2,4),CODE1(0,-2,4),
- CODE1(0,2,4),CODE1(0,2,4),CODE1(0,2,4),CODE1(0,2,4),
- CODE1(0,3,4),CODE1(0,3,4),CODE1(0,3,4),CODE1(0,3,4),
-
- CODE1(0,0,3),CODE1(0,0,3),CODE1(0,0,3),CODE1(0,0,3),
- CODE1(0,0,3),CODE1(0,0,3),CODE1(0,0,3),CODE1(0,0,3),
- CODE1(0,-7,6),CODE1(0,-6,6),CODE1(0,-5,6),CODE1(0,-4,6),
- CODE1(0,4,6),CODE1(0,5,6),CODE1(0,6,6),CODE1(0,7,6),
-
-};
-
-static const u_long DC_UVtab0[56] = {
- CODE1(0,0,2),CODE1(0,0,2),CODE1(0,0,2),CODE1(0,0,2),
- CODE1(0,0,2),CODE1(0,0,2),CODE1(0,0,2),CODE1(0,0,2),
- CODE1(0,0,2),CODE1(0,0,2),CODE1(0,0,2),CODE1(0,0,2),
- CODE1(0,0,2),CODE1(0,0,2),CODE1(0,0,2),CODE1(0,0,2),
-
- CODE1(0,-1,3),CODE1(0,-1,3),CODE1(0,-1,3),CODE1(0,-1,3),
- CODE1(0,-1,3),CODE1(0,-1,3),CODE1(0,-1,3),CODE1(0,-1,3),
- CODE1(0,1,3),CODE1(0,1,3),CODE1(0,1,3),CODE1(0,1,3),
- CODE1(0,1,3),CODE1(0,1,3),CODE1(0,1,3),CODE1(0,1,3),
-
- CODE1(0,-3,4),CODE1(0,-3,4),CODE1(0,-3,4),CODE1(0,-3,4),
- CODE1(0,-2,4),CODE1(0,-2,4),CODE1(0,-2,4),CODE1(0,-2,4),
- CODE1(0,2,4),CODE1(0,2,4),CODE1(0,2,4),CODE1(0,2,4),
- CODE1(0,3,4),CODE1(0,3,4),CODE1(0,3,4),CODE1(0,3,4),
-
- CODE1(0,-7,6),CODE1(0,-6,6),CODE1(0,-5,6),CODE1(0,-4,6),
- CODE1(0,4,6),CODE1(0,5,6),CODE1(0,6,6),CODE1(0,7,6),
-};
-
-#define DCTSIZE2 64
-
-/* decode one intra coded MPEG-1 block */
-
-#define Show_Bits(N) (bitbuf>>(32-(N)))
-/* 最小有効bit 17 bit*/
-
-#define Flush_Buffer(N) {bitbuf <<=(N);incnt +=(N);while(incnt>=0) {bitbuf |= Get_Word()<<incnt;incnt-=16;}}
-
-#define Init_Buffer() {bitbuf = (mdec_bs[0]<<16)|(mdec_bs[1]);mdec_bs+=2;incnt = -16;}
-
-#define Get_Word() (*mdec_bs++)
-#define Printf printf
-
-
-int DecDCTvlc(u_short *mdec_bs,u_short *mdec_rl)
-{
-// u_short *mdec_bs = mdecbs,*mdec_rl = mdecrl
- u_short *rl_end;
- u_long bitbuf;
- int incnt; /* 16-有効bit数 x86=char risc = long */
- int q_code;
- int type,n;
- int last_dc[3];
-
-/* BS_HDR u_short rlsize,magic,ver,q_scale */
-
- //printf("%04x,%04x,",mdec_bs[0],mdec_bs[1]);
- *(long*)mdec_rl=*(long*)mdec_bs;
- mdec_rl+=2;
- rl_end = mdec_rl+(int)mdec_bs[0]*2;
- q_code = (mdec_bs[2]<<10); /* code = q */
- type = mdec_bs[3];
- mdec_bs+=4;
-
- Init_Buffer();
-
- n = 0;
- last_dc[0]=last_dc[1]=last_dc[2] = 0;
- while(mdec_rl<rl_end) {
- u_long code2;
- /* DC */
- if (type==2) {
- code2 = Show_Bits(10)|(10<<16); /* DC code */
- } else {
- code2 = Show_Bits(6);
- if (n>=2) {
- /* Y */
- if (code2<48) {
- code2 = DC_Ytab0[code2];
- code2 = (code2&0xffff0000)|((last_dc[2]+=VALOF(code2)*4)&0x3ff);
- } else {
- int nbit,val;
- int bit = 3;
- while(Show_Bits(bit)&1) { bit++;}
- bit++;
- nbit = bit*2-1;
- val = Show_Bits(nbit)&((1<<bit)-1);
- if ((val&(1<<(bit-1)))==0)
- val -= (1<<bit)-1;
- val = (last_dc[2]+=val*4);
- code2 = (nbit<<16) | (val&0x3ff);
- }
- //printf("%d ",last_dc[2]);
- } else {
- /* U,V */
- if (code2<56) {
- code2 = DC_UVtab0[code2];
- code2 = (code2&0xffff0000)|((last_dc[n]+=VALOF(code2)*4)&0x3ff);
- } else {
- int nbit,val;
- int bit = 4;
- while(Show_Bits(bit)&1) { bit++;}
- nbit = bit*2;
- val = Show_Bits(nbit)&((1<<bit)-1);
- if ((val&(1<<(bit-1)))==0)
- val -= (1<<bit)-1;
- val = (last_dc[n]+=val*4);
- code2 = (nbit<<16) | (val&0x3ff);
- }
- //printf("%d ",last_dc[n]);
- }
- if (++n==6) n=0;
- }
- // printf("%d ",VALOF(code2));
- code2 |= q_code;
-
- /* AC */
- for(;;){
-// u_long code;
-#define code code2
-#define SBIT 17
- *mdec_rl++=code2;
- Flush_Buffer(BITOF(code2));
- code = Show_Bits(SBIT);
- if (code>=1<<(SBIT- 2)) {
- code2 = VLCtabnext[(code>>12)-8];
- if (code2==EOB_CODE) break;
- }
- else if (code>=1<<(SBIT- 6)) {
- code2 = VLCtab0[(code>>8)-8];
- if (code2==ESCAPE_CODE) {
- Flush_Buffer(6); /* ESCAPE len */
- code2 = Show_Bits(16)| (16<<16);
- }
- }
- else if (code>=1<<(SBIT- 7)) code2 = VLCtab1[(code>>6)-16];
- else if (code>=1<<(SBIT- 8)) code2 = VLCtab2[(code>>4)-32];
- else if (code>=1<<(SBIT- 9)) code2 = VLCtab3[(code>>3)-32];
- else if (code>=1<<(SBIT-10)) code2 = VLCtab4[(code>>2)-32];
- else if (code>=1<<(SBIT-11)) code2 = VLCtab5[(code>>1)-32];
- else if (code>=1<<(SBIT-12)) code2 = VLCtab6[(code>>0)-32];
- else {
- do {
- *mdec_rl++=EOB;
- } while(mdec_rl<rl_end);
- return 0;
- }
- }
- *mdec_rl++=code2; /* EOB code */
- Flush_Buffer(2); /* EOB bitlen */
- }
- return 0;
-}
-
-
-
-/* this table is based on djpeg by Independent Jpeg Group */
-
-static const int aanscales[DCTSIZE2] = {
- /* precomputed values scaled up by 14 bits */
- 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
- 22725, 31521, 29692, 26722, 22725, 17855, 12299, 6270,
- 21407, 29692, 27969, 25172, 21407, 16819, 11585, 5906,
- 19266, 26722, 25172, 22654, 19266, 15137, 10426, 5315,
- 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
- 12873, 17855, 16819, 15137, 12873, 10114, 6967, 3552,
- 8867, 12299, 11585, 10426, 8867, 6967, 4799, 2446,
- 4520, 6270, 5906, 5315, 4520, 3552, 2446, 1247
-};
-
-extern unsigned char zscan[DCTSIZE2];
-
-typedef struct {
- int iqtab[DCTSIZE2];
- unsigned char *iq_y;
- u_short *mdec_rl,*rl_end;
- int mdec_mode;
-} bs_context_t;
-
-void iqtab_init(bs_context_t *ctxt)
-{
-#define CONST_BITS 14
-#define IFAST_SCALE_BITS 2
- int i;
- for(i=0;i<DCTSIZE2;i++) {
- ctxt->iqtab[i] =ctxt->iq_y[i]*aanscales[i]>>(CONST_BITS-IFAST_SCALE_BITS);
- }
-}
-
-#define BLOCK long
-
-extern IDCT(BLOCK *blk,int k);
-
-u_short* rl2blk(bs_context_t *ctxt, BLOCK *blk,u_short *mdec_rl)
-{
- int i,k,q_scale,rl;
- memset(blk,0,6*DCTSIZE2*sizeof(BLOCK));
- for(i=0;i<6;i++) {
- rl = *mdec_rl++;
- q_scale = RUNOF(rl);
- blk[0] = ctxt->iqtab[0]*VALOF(rl);
- k = 0;
- for(;;) {
- rl = *mdec_rl++;
- if (rl==EOB) break;
- k += RUNOF(rl)+1;
- blk[zscan[k]] = ctxt->iqtab[zscan[k]]*q_scale*VALOF(rl)/8;
- }
-
- IDCT(blk,k+1);
-
- blk+=DCTSIZE2;
- }
- return mdec_rl;
-}
-
-#define RGB15(r,g,b) ( (((b)&0xf8)<<7)|(((g)&0xf8)<<2)|((r)>>3) )
-
-#define ROUND(r) bs_roundtbl[(r)+256]
-#if 1
-#define SHIFT 12
-#define toFIX(a) (int)((a)*(1<<SHIFT))
-#define toINT(a) ((a)>>SHIFT)
-#define FIX_1 toFIX(1)
-#define MULR(a) toINT((a)*toFIX(1.402))
-#define MULG(a) toINT((a)*toFIX(-0.3437))
-#define MULG2(a) toINT((a)*toFIX(-0.7143))
-#define MULB(a) toINT((a)*toFIX(1.772))
-#else
-#define MULR(a) 0
-#define MULG(a) 0
-#define MULG2(a) 0
-#define MULB(a) 0
-#endif
-
-
-/*
-int ROUND(int r)
-{
- if (r<0) return 0;
- else if (r>255) return 255;
- else return r;
-}
-*/
-
-extern u_char bs_roundtbl[256*3];
-
-static void yuv2rgb15(BLOCK *blk,u_short *image)
-{
- int x,yy;
- BLOCK *yblk = blk+DCTSIZE2*2;
- for(yy=0;yy<16;yy+=2,blk+=4,yblk+=8,image+=8+16) {
- if (yy==8) yblk+=DCTSIZE2;
- for(x=0;x<4;x++,blk++,yblk+=2,image+=2) {
- int r0,b0,g0,y;
- r0 = MULR(blk[DCTSIZE2]); /* cr */
- g0 = MULG(blk[0])+MULG2(blk[DCTSIZE2]);
- b0 = MULB(blk[0]); /* cb */
- y = yblk[0]+128;
- image[0] = RGB15(ROUND(r0+y),ROUND(g0+y),ROUND(b0+y));
- y = yblk[1]+128+4;
- image[1] = RGB15(ROUND(r0+y),ROUND(g0+y),ROUND(b0+y));
- y = yblk[8]+128+6;
- image[16] = RGB15(ROUND(r0+y),ROUND(g0+y),ROUND(b0+y));
- y = yblk[9]+128+2;
- image[17] = RGB15(ROUND(r0+y),ROUND(g0+y),ROUND(b0+y));
- r0 = MULR(blk[4+DCTSIZE2]);
- g0 = MULG(blk[4])+MULG2(blk[4+DCTSIZE2]);
- b0 = MULB(blk[4]);
- y = yblk[DCTSIZE2+0]+128;
- image[8+0] = RGB15(ROUND(r0+y),ROUND(g0+y),ROUND(b0+y));
- y = yblk[DCTSIZE2+1]+128+4;
- image[8+1] = RGB15(ROUND(r0+y),ROUND(g0+y),ROUND(b0+y));
- y = yblk[DCTSIZE2+8]+128+6;
- image[8+16] = RGB15(ROUND(r0+y),ROUND(g0+y),ROUND(b0+y));
- y = yblk[DCTSIZE2+9]+128+2;
- image[8+17] = RGB15(ROUND(r0+y),ROUND(g0+y),ROUND(b0+y));
- }
- }
-}
-
-enum {B,G,R};
-
-static void yuv2rgb24(BLOCK *blk,u_char image[][3])
-{
- int x,yy;
- BLOCK *yblk = blk+DCTSIZE2*2;
- for(yy=0;yy<16;yy+=2,blk+=4,yblk+=8,image+=8+16) {
- if (yy==8) yblk+=DCTSIZE2;
- for(x=0;x<4;x++,blk++,yblk+=2,image+=2) {
- int r0,b0,g0,y;
- r0 = MULR(blk[DCTSIZE2]); /* cr */
- g0 = MULG(blk[0])+MULG2(blk[DCTSIZE2]);
- b0 = MULB(blk[0]); /* cb */
- y = yblk[0]+128;
- image[0][R] = ROUND(r0+y);
- image[0][G] = ROUND(g0+y);
- image[0][B] = ROUND(b0+y);
- y = yblk[1]+128;
- image[1][R] = ROUND(r0+y);
- image[1][G] = ROUND(g0+y);
- image[1][B] = ROUND(b0+y);
- y = yblk[8]+128;
- image[16][R] = ROUND(r0+y);
- image[16][G] = ROUND(g0+y);
- image[16][B] = ROUND(b0+y);
- y = yblk[9]+128;
- image[17][R] = ROUND(r0+y);
- image[17][G] = ROUND(g0+y);
- image[17][B] = ROUND(b0+y);
-
- r0 = MULR(blk[4+DCTSIZE2]);
- g0 = MULG(blk[4])+MULG2(blk[4+DCTSIZE2]);
- b0 = MULB(blk[4]);
- y = yblk[DCTSIZE2+0]+128;
- image[8+0][R] = ROUND(r0+y);
- image[8+0][G] = ROUND(g0+y);
- image[8+0][B] = ROUND(b0+y);
- y = yblk[DCTSIZE2+1]+128;
- image[8+1][R] = ROUND(r0+y);
- image[8+1][G] = ROUND(g0+y);
- image[8+1][B] = ROUND(b0+y);
- y = yblk[DCTSIZE2+8]+128;
- image[8+16][R] = ROUND(r0+y);
- image[8+16][G] = ROUND(g0+y);
- image[8+16][B] = ROUND(b0+y);
- y = yblk[DCTSIZE2+9]+128;
- image[8+17][R] = ROUND(r0+y);
- image[8+17][G] = ROUND(g0+y);
- image[8+17][B] = ROUND(b0+y);
- }
- }
-}
-
-static void DecDCTReset(bs_context_t *ctxt, int mode)
-{
- iqtab_init(ctxt);
-}
-
-static void DecDCTin(bs_context_t *ctxt, u_short *mdecrl,int mode)
-{
- mdecrl+=2;
- ctxt->mdec_rl = mdecrl;
- ctxt->rl_end = mdecrl+mdecrl[-2]*2;
- ctxt->mdec_mode = mode;
-}
-
-static void DecDCTout(bs_context_t *ctxt, u_short *image,int size)
-{
- BLOCK blk[DCTSIZE2*6];
- int blocksize=16*16;
- if (ctxt->mdec_mode) blocksize = 16*16*3/2;
- for(;size>0;size-=blocksize/2,image+=blocksize) {
- ctxt->mdec_rl = rl2blk(ctxt,blk,ctxt->mdec_rl);
- if (ctxt->mdec_mode==0) yuv2rgb15(blk,image);
- else yuv2rgb24(blk,image);
- }
-}
-
-void bs_decode_rgb24 (
- unsigned char *outbuf, // output RGB bytes (width*height*3)
- bs_header_t *img, // input BS image
- int width, int height, // dimension of BS image
- unsigned char *myiqtab
- )
-{
- unsigned short *buf2 = (unsigned short *) outbuf;
- unsigned short *bufp = (unsigned short *) img;
- bs_context_t ctxt;
- unsigned short *rl,*image;
- int slice,rlsize;
- int mode;
- int x,y;
- int height2 = (height+15)&~15;
- int w;
-
- ctxt.iq_y = myiqtab ? myiqtab : bs_iqtab();
- mode=1;
- w=24;
- width = width*3/2;
-
- image = (unsigned short *) malloc (height2*w*sizeof(short));
- rl = (unsigned short *) malloc ((bufp[0]+2)*sizeof(long));
-
- DecDCTReset(&ctxt,0);
- DecDCTvlc(bufp,rl);
- DecDCTin(&ctxt,rl,mode);
-
- slice = height2*w/2;
-
- for(x=0;x<width;x+=w)
- {
- short *dst,*src;
- DecDCTout(&ctxt,image,slice);
- src = image;
- dst = buf2+x+(0)*width;
- for(y=height-1;y>=0;y--)
- {
- memcpy(dst,src,w*2);
- src+=w;
- dst+=width;
- }
- }
-
- free (image);
- free (rl);
-}
-
-void bs_decode_rgb15 (
- unsigned short *outbuf, // output RGB bytes (width*height*2)
- bs_header_t *img, // input BS image
- int width, int height, // dimension of BS image
- unsigned char *myiqtab
- )
-{
- unsigned short *buf2 = (unsigned short *) outbuf;
- unsigned short *bufp = (unsigned short *) img;
- bs_context_t ctxt;
- unsigned short *rl,*image;
- int slice,rlsize;
- int mode;
- int x,y;
- int height2 = (height+15)&~15;
- int w;
-
- ctxt.iq_y = myiqtab ? myiqtab : bs_iqtab();
- mode=0;
- w=24;
-
- image = (unsigned short *) malloc (height2*w*sizeof(short));
- rl = (unsigned short *) malloc ((bufp[0]+2)*sizeof(long));
-
- DecDCTReset(&ctxt,0);
- DecDCTvlc(bufp,rl);
- DecDCTin(&ctxt,rl,mode);
-
- slice = height2*w/2;
-
- for(x=0;x<width;x+=w)
- {
- short *dst,*src;
- DecDCTout(&ctxt,image,slice);
- src = image;
- dst = buf2+x+(height-1)*width;
- for(y=height-1;y>=0;y--)
- {
- memcpy(dst,src,w*2);
- src+=w;
- dst-=width;
- }
- }
-
- free (image);
- free (rl);
-}
+#include "bs.h"
+#include <sys/types.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define SOFT
+
+#define CODE1(a,b,c) (((a)<<10)|((b)&0x3ff)|((c)<<16))
+/* run, level, bit */
+#define CODE(a,b,c) CODE1(a,b,c+1),CODE1(a,-b,c+1)
+#define CODE0(a,b,c) CODE1(a,b,c),CODE1(a,b,c)
+#define CODE2(a,b,c) CODE1(a,b,c+1),CODE1(a,b,c+1)
+#define RUNOF(a) ((a)>>10)
+#define VALOF(a) ((short)((a)<<6)>>6)
+#define BITOF(a) ((a)>>16)
+#define EOB 0xfe00
+#define ESCAPE_CODE CODE1(63,0,6)
+#define EOB_CODE CODE1(63,512,2)
+
+/*
+ DC code
+ Y U,V
+0 100 00 0
+1 00x 01x -1,1
+2 01xx 10xx -3,-2,2,3
+3 101xxx 110xxx -7..-4,4..7
+4 110xxxx 1110 -15..-8,8..15
+5 1110xxxxx 11110 -31..-16,16..31
+6 11110xxxxxx 111110 -63..-32,32..63
+7 111110 1111110 -127..-64,64..127
+8 1111110 11111110 -255..-128,128..255
+ 7+8 8+8
+*/
+
+/*
+ This table based on MPEG2DEC by MPEG Software Simulation Group
+*/
+
+/* Table B-14, DCT coefficients table zero,
+* codes 0100 ... 1xxx (used for all other coefficients)
+*/
+static const u_long VLCtabnext[12*2] = {
+ CODE(0,2,4), CODE(2,1,4), CODE2(1,1,3), CODE2(1,-1,3),
+ CODE0(63,512,2), CODE0(63,512,2), CODE0(63,512,2), CODE0(63,512,2), /*EOB*/
+ CODE2(0,1,2), CODE2(0,1,2), CODE2(0,-1,2), CODE2(0,-1,2)
+};
+
+/* Table B-14, DCT coefficients table zero,
+* codes 000001xx ... 00111xxx
+*/
+static const u_long VLCtab0[60*2] = {
+ CODE0(63,0,6), CODE0(63,0,6),CODE0(63,0,6), CODE0(63,0,6), /* ESCAPE */
+ CODE2(2,2,7), CODE2(2,-2,7), CODE2(9,1,7), CODE2(9,-1,7),
+ CODE2(0,4,7), CODE2(0,-4,7), CODE2(8,1,7), CODE2(8,-1,7),
+ CODE2(7,1,6), CODE2(7,1,6), CODE2(7,-1,6), CODE2(7,-1,6),
+ CODE2(6,1,6), CODE2(6,1,6), CODE2(6,-1,6), CODE2(6,-1,6),
+ CODE2(1,2,6), CODE2(1,2,6), CODE2(1,-2,6), CODE2(1,-2,6),
+ CODE2(5,1,6), CODE2(5,1,6), CODE2(5,-1,6), CODE2(5,-1,6),
+ CODE(13,1,8), CODE(0,6,8), CODE(12,1,8), CODE(11,1,8),
+ CODE(3,2,8), CODE(1,3,8), CODE(0,5,8), CODE(10,1,8),
+ CODE2(0,3,5), CODE2(0,3,5), CODE2(0,3,5), CODE2(0,3,5),
+ CODE2(0,-3,5), CODE2(0,-3,5), CODE2(0,-3,5), CODE2(0,-3,5),
+ CODE2(4,1,5), CODE2(4,1,5), CODE2(4,1,5), CODE2(4,1,5),
+ CODE2(4,-1,5), CODE2(4,-1,5), CODE2(4,-1,5), CODE2(4,-1,5),
+ CODE2(3,1,5), CODE2(3,1,5), CODE2(3,1,5), CODE2(3,1,5),
+ CODE2(3,-1,5), CODE2(3,-1,5), CODE2(3,-1,5), CODE2(3,-1,5)
+};
+
+/* Table B-14, DCT coefficients table zero,
+* codes 0000001000 ... 0000001111
+*/
+static const u_long VLCtab1[8*2] = {
+ CODE(16,1,10), CODE(5,2,10), CODE(0,7,10), CODE(2,3,10),
+ CODE(1,4,10), CODE(15,1,10), CODE(14,1,10), CODE(4,2,10)
+};
+
+/* Table B-14/15, DCT coefficients table zero / one,
+* codes 000000010000 ... 000000011111
+*/
+static const u_long VLCtab2[16*2] = {
+ CODE(0,11,12), CODE(8,2,12), CODE(4,3,12), CODE(0,10,12),
+ CODE(2,4,12), CODE(7,2,12), CODE(21,1,12), CODE(20,1,12),
+ CODE(0,9,12), CODE(19,1,12), CODE(18,1,12), CODE(1,5,12),
+ CODE(3,3,12), CODE(0,8,12), CODE(6,2,12), CODE(17,1,12)
+};
+
+/* Table B-14/15, DCT coefficients table zero / one,
+* codes 0000000010000 ... 0000000011111
+*/
+static const u_long VLCtab3[16*2] = {
+ CODE(10,2,13), CODE(9,2,13), CODE(5,3,13), CODE(3,4,13),
+ CODE(2,5,13), CODE(1,7,13), CODE(1,6,13), CODE(0,15,13),
+ CODE(0,14,13), CODE(0,13,13), CODE(0,12,13), CODE(26,1,13),
+ CODE(25,1,13), CODE(24,1,13), CODE(23,1,13), CODE(22,1,13)
+};
+
+/* Table B-14/15, DCT coefficients table zero / one,
+* codes 00000000010000 ... 00000000011111
+*/
+static const u_long VLCtab4[16*2] = {
+ CODE(0,31,14), CODE(0,30,14), CODE(0,29,14), CODE(0,28,14),
+ CODE(0,27,14), CODE(0,26,14), CODE(0,25,14), CODE(0,24,14),
+ CODE(0,23,14), CODE(0,22,14), CODE(0,21,14), CODE(0,20,14),
+ CODE(0,19,14), CODE(0,18,14), CODE(0,17,14), CODE(0,16,14)
+};
+
+/* Table B-14/15, DCT coefficients table zero / one,
+* codes 000000000010000 ... 000000000011111
+*/
+static const u_long VLCtab5[16*2] = {
+ CODE(0,40,15), CODE(0,39,15), CODE(0,38,15), CODE(0,37,15),
+ CODE(0,36,15), CODE(0,35,15), CODE(0,34,15), CODE(0,33,15),
+ CODE(0,32,15), CODE(1,14,15), CODE(1,13,15), CODE(1,12,15),
+ CODE(1,11,15), CODE(1,10,15), CODE(1,9,15), CODE(1,8,15)
+};
+
+/* Table B-14/15, DCT coefficients table zero / one,
+* codes 0000000000010000 ... 0000000000011111
+*/
+static const u_long VLCtab6[16*2] = {
+ CODE(1,18,16), CODE(1,17,16), CODE(1,16,16), CODE(1,15,16),
+ CODE(6,3,16), CODE(16,2,16), CODE(15,2,16), CODE(14,2,16),
+ CODE(13,2,16), CODE(12,2,16), CODE(11,2,16), CODE(31,1,16),
+ CODE(30,1,16), CODE(29,1,16), CODE(28,1,16), CODE(27,1,16)
+};
+
+/*
+ DC code
+ Y U,V
+0 100 00 0
+1 00x 01x -1,1
+2 01xx 10xx -3,-2,2,3
+3 101xxx 110xxx -7..-4,4..7
+4 110xxxx 1110xxxx -15..-8,8..15
+5 1110xxxxx 11110xxxxx -31..-16,16..31
+6 11110xxxxxx 111110xxxxxx -63..-32,32..63
+7 111110xxxxxxx 1111110xxxxxxx -127..-64,64..127
+8 1111110xxxxxxxx 11111110xxxxxxxx -255..-128,128..255
+*/
+
+static const u_long DC_Ytab0[48] = {
+ CODE1(0,-1,3),CODE1(0,-1,3),CODE1(0,-1,3),CODE1(0,-1,3),
+ CODE1(0,-1,3),CODE1(0,-1,3),CODE1(0,-1,3),CODE1(0,-1,3),
+ CODE1(0,1,3),CODE1(0,1,3),CODE1(0,1,3),CODE1(0,1,3),
+ CODE1(0,1,3),CODE1(0,1,3),CODE1(0,1,3),CODE1(0,1,3),
+
+ CODE1(0,-3,4),CODE1(0,-3,4),CODE1(0,-3,4),CODE1(0,-3,4),
+ CODE1(0,-2,4),CODE1(0,-2,4),CODE1(0,-2,4),CODE1(0,-2,4),
+ CODE1(0,2,4),CODE1(0,2,4),CODE1(0,2,4),CODE1(0,2,4),
+ CODE1(0,3,4),CODE1(0,3,4),CODE1(0,3,4),CODE1(0,3,4),
+
+ CODE1(0,0,3),CODE1(0,0,3),CODE1(0,0,3),CODE1(0,0,3),
+ CODE1(0,0,3),CODE1(0,0,3),CODE1(0,0,3),CODE1(0,0,3),
+ CODE1(0,-7,6),CODE1(0,-6,6),CODE1(0,-5,6),CODE1(0,-4,6),
+ CODE1(0,4,6),CODE1(0,5,6),CODE1(0,6,6),CODE1(0,7,6),
+
+};
+
+static const u_long DC_UVtab0[56] = {
+ CODE1(0,0,2),CODE1(0,0,2),CODE1(0,0,2),CODE1(0,0,2),
+ CODE1(0,0,2),CODE1(0,0,2),CODE1(0,0,2),CODE1(0,0,2),
+ CODE1(0,0,2),CODE1(0,0,2),CODE1(0,0,2),CODE1(0,0,2),
+ CODE1(0,0,2),CODE1(0,0,2),CODE1(0,0,2),CODE1(0,0,2),
+
+ CODE1(0,-1,3),CODE1(0,-1,3),CODE1(0,-1,3),CODE1(0,-1,3),
+ CODE1(0,-1,3),CODE1(0,-1,3),CODE1(0,-1,3),CODE1(0,-1,3),
+ CODE1(0,1,3),CODE1(0,1,3),CODE1(0,1,3),CODE1(0,1,3),
+ CODE1(0,1,3),CODE1(0,1,3),CODE1(0,1,3),CODE1(0,1,3),
+
+ CODE1(0,-3,4),CODE1(0,-3,4),CODE1(0,-3,4),CODE1(0,-3,4),
+ CODE1(0,-2,4),CODE1(0,-2,4),CODE1(0,-2,4),CODE1(0,-2,4),
+ CODE1(0,2,4),CODE1(0,2,4),CODE1(0,2,4),CODE1(0,2,4),
+ CODE1(0,3,4),CODE1(0,3,4),CODE1(0,3,4),CODE1(0,3,4),
+
+ CODE1(0,-7,6),CODE1(0,-6,6),CODE1(0,-5,6),CODE1(0,-4,6),
+ CODE1(0,4,6),CODE1(0,5,6),CODE1(0,6,6),CODE1(0,7,6),
+};
+
+#define DCTSIZE2 64
+
+/* decode one intra coded MPEG-1 block */
+
+#define Show_Bits(N) (bitbuf>>(32-(N)))
+/* 最小有効bit 17 bit*/
+
+#define Flush_Buffer(N) {bitbuf <<=(N);incnt +=(N);while(incnt>=0) {bitbuf |= Get_Word()<<incnt;incnt-=16;}}
+
+#define Init_Buffer() {bitbuf = (mdec_bs[0]<<16)|(mdec_bs[1]);mdec_bs+=2;incnt = -16;}
+
+#define Get_Word() (*mdec_bs++)
+#define Printf printf
+
+
+int DecDCTvlc(u_short *mdec_bs,u_short *mdec_rl)
+{
+/* u_short *mdec_bs = mdecbs,*mdec_rl = mdecrl */
+ u_short *rl_end;
+ u_long bitbuf;
+ int incnt; /* 16-有効bit数 x86=char risc = long */
+ int q_code;
+ int type,n;
+ int last_dc[3];
+
+/* BS_HDR u_short rlsize,magic,ver,q_scale */
+
+ /* printf("%04x,%04x,",mdec_bs[0],mdec_bs[1]); */
+ *(long*)mdec_rl=*(long*)mdec_bs;
+ mdec_rl+=2;
+ rl_end = mdec_rl+(int)mdec_bs[0]*2;
+ q_code = (mdec_bs[2]<<10); /* code = q */
+ type = mdec_bs[3];
+ mdec_bs+=4;
+
+ Init_Buffer();
+
+ n = 0;
+ last_dc[0]=last_dc[1]=last_dc[2] = 0;
+ while(mdec_rl<rl_end) {
+ u_long code2;
+ /* DC */
+ if (type==2) {
+ code2 = Show_Bits(10)|(10<<16); /* DC code */
+ } else {
+ code2 = Show_Bits(6);
+ if (n>=2) {
+ /* Y */
+ if (code2<48) {
+ code2 = DC_Ytab0[code2];
+ code2 = (code2&0xffff0000)|((last_dc[2]+=VALOF(code2)*4)&0x3ff);
+ } else {
+ int nbit,val;
+ int bit = 3;
+ while(Show_Bits(bit)&1) { bit++;}
+ bit++;
+ nbit = bit*2-1;
+ val = Show_Bits(nbit)&((1<<bit)-1);
+ if ((val&(1<<(bit-1)))==0)
+ val -= (1<<bit)-1;
+ val = (last_dc[2]+=val*4);
+ code2 = (nbit<<16) | (val&0x3ff);
+ }
+ /* printf("%d ",last_dc[2]); */
+ } else {
+ /* U,V */
+ if (code2<56) {
+ code2 = DC_UVtab0[code2];
+ code2 = (code2&0xffff0000)|((last_dc[n]+=VALOF(code2)*4)&0x3ff);
+ } else {
+ int nbit,val;
+ int bit = 4;
+ while(Show_Bits(bit)&1) { bit++;}
+ nbit = bit*2;
+ val = Show_Bits(nbit)&((1<<bit)-1);
+ if ((val&(1<<(bit-1)))==0)
+ val -= (1<<bit)-1;
+ val = (last_dc[n]+=val*4);
+ code2 = (nbit<<16) | (val&0x3ff);
+ }
+ /* printf("%d ",last_dc[n]); */
+ }
+ if (++n==6) n=0;
+ }
+ /* printf("%d ",VALOF(code2)); */
+ code2 |= q_code;
+
+ /* AC */
+ for(;;){
+/* u_long code; */
+#define code code2
+#define SBIT 17
+ *mdec_rl++=code2;
+ Flush_Buffer(BITOF(code2));
+ code = Show_Bits(SBIT);
+ if (code>=1<<(SBIT- 2)) {
+ code2 = VLCtabnext[(code>>12)-8];
+ if (code2==EOB_CODE) break;
+ }
+ else if (code>=1<<(SBIT- 6)) {
+ code2 = VLCtab0[(code>>8)-8];
+ if (code2==ESCAPE_CODE) {
+ Flush_Buffer(6); /* ESCAPE len */
+ code2 = Show_Bits(16)| (16<<16);
+ }
+ }
+ else if (code>=1<<(SBIT- 7)) code2 = VLCtab1[(code>>6)-16];
+ else if (code>=1<<(SBIT- 8)) code2 = VLCtab2[(code>>4)-32];
+ else if (code>=1<<(SBIT- 9)) code2 = VLCtab3[(code>>3)-32];
+ else if (code>=1<<(SBIT-10)) code2 = VLCtab4[(code>>2)-32];
+ else if (code>=1<<(SBIT-11)) code2 = VLCtab5[(code>>1)-32];
+ else if (code>=1<<(SBIT-12)) code2 = VLCtab6[(code>>0)-32];
+ else {
+ do {
+ *mdec_rl++=EOB;
+ } while(mdec_rl<rl_end);
+ return 0;
+ }
+ }
+ *mdec_rl++=code2; /* EOB code */
+ Flush_Buffer(2); /* EOB bitlen */
+ }
+ return 0;
+}
+
+
+
+/* this table is based on djpeg by Independent Jpeg Group */
+
+static const int aanscales[DCTSIZE2] = {
+ /* precomputed values scaled up by 14 bits */
+ 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
+ 22725, 31521, 29692, 26722, 22725, 17855, 12299, 6270,
+ 21407, 29692, 27969, 25172, 21407, 16819, 11585, 5906,
+ 19266, 26722, 25172, 22654, 19266, 15137, 10426, 5315,
+ 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
+ 12873, 17855, 16819, 15137, 12873, 10114, 6967, 3552,
+ 8867, 12299, 11585, 10426, 8867, 6967, 4799, 2446,
+ 4520, 6270, 5906, 5315, 4520, 3552, 2446, 1247
+};
+
+extern unsigned char zscan[DCTSIZE2];
+
+typedef struct {
+ int iqtab[DCTSIZE2];
+ const unsigned char *iq_y;
+ u_short *mdec_rl,*rl_end;
+ int mdec_mode;
+} bs_context_t;
+
+void iqtab_init(bs_context_t *ctxt)
+{
+#define CONST_BITS 14
+#define IFAST_SCALE_BITS 2
+ int i;
+ for(i=0;i<DCTSIZE2;i++) {
+ ctxt->iqtab[i] =ctxt->iq_y[i]*aanscales[i]>>(CONST_BITS-IFAST_SCALE_BITS);
+ }
+}
+
+#define BLOCK long
+
+extern void IDCT(BLOCK *blk,int k);
+
+u_short* rl2blk(bs_context_t *ctxt, BLOCK *blk,u_short *mdec_rl)
+{
+ int i,k,q_scale,rl;
+ memset(blk,0,6*DCTSIZE2*sizeof(BLOCK));
+ for(i=0;i<6;i++) {
+ rl = *mdec_rl++;
+ q_scale = RUNOF(rl);
+ blk[0] = ctxt->iqtab[0]*VALOF(rl);
+ k = 0;
+ for(;;) {
+ rl = *mdec_rl++;
+ if (rl==EOB) break;
+ k += RUNOF(rl)+1;
+ blk[zscan[k]] = ctxt->iqtab[zscan[k]]*q_scale*VALOF(rl)/8;
+ }
+
+ IDCT(blk,k+1);
+
+ blk+=DCTSIZE2;
+ }
+ return mdec_rl;
+}
+
+#define RGB15(r,g,b) ( (((b)&0xf8)<<7)|(((g)&0xf8)<<2)|((r)>>3) )
+
+#define ROUND(r) bs_roundtbl[(r)+256]
+#if 1
+#define SHIFT 12
+#define toFIX(a) (int)((a)*(1<<SHIFT))
+#define toINT(a) ((a)>>SHIFT)
+#define FIX_1 toFIX(1)
+#define MULR(a) toINT((a)*toFIX(1.402))
+#define MULG(a) toINT((a)*toFIX(-0.3437))
+#define MULG2(a) toINT((a)*toFIX(-0.7143))
+#define MULB(a) toINT((a)*toFIX(1.772))
+#else
+#define MULR(a) 0
+#define MULG(a) 0
+#define MULG2(a) 0
+#define MULB(a) 0
+#endif
+
+
+/*
+int ROUND(int r)
+{
+ if (r<0) return 0;
+ else if (r>255) return 255;
+ else return r;
+}
+*/
+
+extern u_char bs_roundtbl[256*3];
+
+static void yuv2rgb15(BLOCK *blk,u_short *image)
+{
+ int x,yy;
+ BLOCK *yblk = blk+DCTSIZE2*2;
+ for(yy=0;yy<16;yy+=2,blk+=4,yblk+=8,image+=8+16) {
+ if (yy==8) yblk+=DCTSIZE2;
+ for(x=0;x<4;x++,blk++,yblk+=2,image+=2) {
+ int r0,b0,g0,y;
+ r0 = MULR(blk[DCTSIZE2]); /* cr */
+ g0 = MULG(blk[0])+MULG2(blk[DCTSIZE2]);
+ b0 = MULB(blk[0]); /* cb */
+ y = yblk[0]+128;
+ image[0] = RGB15(ROUND(r0+y),ROUND(g0+y),ROUND(b0+y));
+ y = yblk[1]+128+4;
+ image[1] = RGB15(ROUND(r0+y),ROUND(g0+y),ROUND(b0+y));
+ y = yblk[8]+128+6;
+ image[16] = RGB15(ROUND(r0+y),ROUND(g0+y),ROUND(b0+y));
+ y = yblk[9]+128+2;
+ image[17] = RGB15(ROUND(r0+y),ROUND(g0+y),ROUND(b0+y));
+ r0 = MULR(blk[4+DCTSIZE2]);
+ g0 = MULG(blk[4])+MULG2(blk[4+DCTSIZE2]);
+ b0 = MULB(blk[4]);
+ y = yblk[DCTSIZE2+0]+128;
+ image[8+0] = RGB15(ROUND(r0+y),ROUND(g0+y),ROUND(b0+y));
+ y = yblk[DCTSIZE2+1]+128+4;
+ image[8+1] = RGB15(ROUND(r0+y),ROUND(g0+y),ROUND(b0+y));
+ y = yblk[DCTSIZE2+8]+128+6;
+ image[8+16] = RGB15(ROUND(r0+y),ROUND(g0+y),ROUND(b0+y));
+ y = yblk[DCTSIZE2+9]+128+2;
+ image[8+17] = RGB15(ROUND(r0+y),ROUND(g0+y),ROUND(b0+y));
+ }
+ }
+}
+
+enum {B,G,R};
+
+static void yuv2rgb24(BLOCK *blk,u_char image[][3])
+{
+ int x,yy;
+ BLOCK *yblk = blk+DCTSIZE2*2;
+ for(yy=0;yy<16;yy+=2,blk+=4,yblk+=8,image+=8+16) {
+ if (yy==8) yblk+=DCTSIZE2;
+ for(x=0;x<4;x++,blk++,yblk+=2,image+=2) {
+ int r0,b0,g0,y;
+ r0 = MULR(blk[DCTSIZE2]); /* cr */
+ g0 = MULG(blk[0])+MULG2(blk[DCTSIZE2]);
+ b0 = MULB(blk[0]); /* cb */
+ y = yblk[0]+128;
+ image[0][R] = ROUND(r0+y);
+ image[0][G] = ROUND(g0+y);
+ image[0][B] = ROUND(b0+y);
+ y = yblk[1]+128;
+ image[1][R] = ROUND(r0+y);
+ image[1][G] = ROUND(g0+y);
+ image[1][B] = ROUND(b0+y);
+ y = yblk[8]+128;
+ image[16][R] = ROUND(r0+y);
+ image[16][G] = ROUND(g0+y);
+ image[16][B] = ROUND(b0+y);
+ y = yblk[9]+128;
+ image[17][R] = ROUND(r0+y);
+ image[17][G] = ROUND(g0+y);
+ image[17][B] = ROUND(b0+y);
+
+ r0 = MULR(blk[4+DCTSIZE2]);
+ g0 = MULG(blk[4])+MULG2(blk[4+DCTSIZE2]);
+ b0 = MULB(blk[4]);
+ y = yblk[DCTSIZE2+0]+128;
+ image[8+0][R] = ROUND(r0+y);
+ image[8+0][G] = ROUND(g0+y);
+ image[8+0][B] = ROUND(b0+y);
+ y = yblk[DCTSIZE2+1]+128;
+ image[8+1][R] = ROUND(r0+y);
+ image[8+1][G] = ROUND(g0+y);
+ image[8+1][B] = ROUND(b0+y);
+ y = yblk[DCTSIZE2+8]+128;
+ image[8+16][R] = ROUND(r0+y);
+ image[8+16][G] = ROUND(g0+y);
+ image[8+16][B] = ROUND(b0+y);
+ y = yblk[DCTSIZE2+9]+128;
+ image[8+17][R] = ROUND(r0+y);
+ image[8+17][G] = ROUND(g0+y);
+ image[8+17][B] = ROUND(b0+y);
+ }
+ }
+}
+
+static void DecDCTReset(bs_context_t *ctxt, int mode)
+{
+ iqtab_init(ctxt);
+}
+
+static void DecDCTin(bs_context_t *ctxt, u_short *mdecrl,int mode)
+{
+ mdecrl+=2;
+ ctxt->mdec_rl = mdecrl;
+ ctxt->rl_end = mdecrl+mdecrl[-2]*2;
+ ctxt->mdec_mode = mode;
+}
+
+static void DecDCTout(bs_context_t *ctxt, u_short *image,int size)
+{
+ BLOCK blk[DCTSIZE2*6];
+ int blocksize=16*16;
+ if (ctxt->mdec_mode) blocksize = 16*16*3/2;
+ for(;size>0;size-=blocksize/2,image+=blocksize) {
+ ctxt->mdec_rl = rl2blk(ctxt,blk,ctxt->mdec_rl);
+ if (ctxt->mdec_mode==0) yuv2rgb15(blk,image);
+ else yuv2rgb24(blk,image);
+ }
+}
+
+void bs_decode_rgb24 (
+ unsigned char *outbuf, /* output RGB bytes (width*height*3) */
+ bs_header_t *img, /* input BS image */
+ int width, int height, /* dimension of BS image */
+ const unsigned char *myiqtab
+ )
+{
+ unsigned short *buf2 = (unsigned short *) outbuf;
+ unsigned short *bufp = (unsigned short *) img;
+ bs_context_t ctxt;
+ unsigned short *rl,*image;
+ int slice;
+ /* int rlsize; */
+ int mode;
+ int x,y;
+ int height2 = (height+15)&~15;
+ int w;
+
+ ctxt.iq_y = myiqtab ? myiqtab : bs_iqtab();
+ mode=1;
+ w=24;
+ width = width*3/2;
+
+ image = (unsigned short *) malloc (height2*w*sizeof(short));
+ rl = (unsigned short *) malloc ((bufp[0]+2)*sizeof(long));
+
+ DecDCTReset(&ctxt,0);
+ DecDCTvlc(bufp,rl);
+ DecDCTin(&ctxt,rl,mode);
+
+ slice = height2*w/2;
+
+ for(x=0;x<width;x+=w)
+ {
+ u_short *dst,*src;
+ DecDCTout(&ctxt,image,slice);
+ src = image;
+ dst = buf2+x+(0)*width;
+ for(y=height-1;y>=0;y--)
+ {
+ memcpy(dst,src,w*2);
+ src+=w;
+ dst+=width;
+ }
+ }
+
+ free (image);
+ free (rl);
+}
+
+void bs_decode_rgb15 (
+ unsigned short *outbuf, /* output RGB bytes (width*height*2) */
+ bs_header_t *img, /* input BS image */
+ int width, int height, /* dimension of BS image */
+ const unsigned char *myiqtab
+ )
+{
+ unsigned short *buf2 = (unsigned short *) outbuf;
+ unsigned short *bufp = (unsigned short *) img;
+ bs_context_t ctxt;
+ unsigned short *rl,*image;
+ int slice;
+ /* int rlsize; */
+ int mode;
+ int x,y;
+ int height2 = (height+15)&~15;
+ int w;
+
+ ctxt.iq_y = myiqtab ? myiqtab : bs_iqtab();
+ mode=0;
+ w=24;
+
+ image = (unsigned short *) malloc (height2*w*sizeof(short));
+ rl = (unsigned short *) malloc ((bufp[0]+2)*sizeof(long));
+
+ DecDCTReset(&ctxt,0);
+ DecDCTvlc(bufp,rl);
+ DecDCTin(&ctxt,rl,mode);
+
+ slice = height2*w/2;
+
+ for(x=0;x<width;x+=w)
+ {
+ u_short *dst,*src;
+ DecDCTout(&ctxt,image,slice);
+ src = image;
+ dst = buf2+x+(height-1)*width;
+ for(y=height-1;y>=0;y--)
+ {
+ memcpy(dst,src,w*2);
+ src+=w;
+ dst-=width;
+ }
+ }
+
+ free (image);
+ free (rl);
+}
diff --git a/psxdev/xadecode.c b/psxdev/xadecode.c
new file mode 100644
index 0000000..682b42c
--- /dev/null
+++ b/psxdev/xadecode.c
@@ -0,0 +1,301 @@
+/*
+ author: unknown, probably bitmaster?
+ slightly modified by dbalster
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include "xadecode.h"
+
+#if USE_FXD
+static FXD K0[4] = {
+ 0x00000000,
+ 0x0000F000,
+ 0x0001CC00,
+ 0x00018800
+};
+static FXD K1[4] = {
+ 0x00000000,
+ 0x00000000,
+ 0xFFFF3000,
+ 0xFFFF2400
+};
+FXD t1, t2, at1[256], at2[256];
+FXD t1_x, t2_x, at1_x[256], at2_x[256];
+#else
+static double K0[4] = {
+ 0.0,
+ 0.9375,
+ 1.796875,
+ 1.53125
+};
+static double K1[4] = {
+ 0.0,
+ 0.0,
+ -0.8125,
+ -0.859375
+};
+double t1, t2, at1[256], at2[256];
+double t1_x, t2_x, at1_x[256], at2_x[256];
+#endif
+
+void initXaDecode(void)
+{
+ int i;
+
+ for (i=0; i<256; ++i)
+ {
+ at1[i] = at2[i] = at1_x[i] = at2_x[i] = 0;
+ }
+}
+void reinitXaDecode(int i)
+{
+ at1[i] = at2[i] = at1_x[i] = at2_x[i] = 0;
+}
+void switchXaDecode(int i)
+{
+ t1 = at1[i];
+ t2 = at2[i];
+ t1_x = at1_x[i];
+ t2_x = at2_x[i];
+}
+void saveXaDecode(int i)
+{
+ at1[i] = t1;
+ at2[i] = t2;
+ at1_x[i]= t1_x;
+ at2_x[i]= t2_x;
+}
+
+char xachannel(SoundSector *ss)
+{
+ return(ss->sectorFiller[XAChannel]);
+}
+
+unsigned char xatype(SoundSector *ss)
+{
+ return(unsigned char) (ss->sectorFiller[XAType]);
+}
+
+char xafileno(SoundSector *ss)
+{
+ return(ss->sectorFiller[XAFile]);
+}
+
+char xastereo(SoundSector *ss)
+{
+ return(ss->sectorFiller[XAFlags]&XAFStereo);
+}
+
+char xahalfhz(SoundSector *ss)
+{
+ return(ss->sectorFiller[XAFlags]&XAFHalfHz);
+}
+
+long convXaToWave(char *adp, char *wav, int cn, int fn_s, int fn_e)
+{
+ SoundSector ssct;
+ int i;
+
+ memcpy(ssct.sectorFiller,adp,sizeof(ssct.sectorFiller));
+ for(i=0;i<18;i++)
+ memcpy(ssct.SoundGroups[i],adp+sizeof(ssct.sectorFiller)+(128*i),128);
+ if ((xachannel(&ssct) == cn) && (xatype(&ssct) == XAAUDIO))
+ {
+ if (xafileno(&ssct) >= fn_s
+ && xafileno(&ssct) <= fn_e)
+ {
+ if (xastereo(&ssct))
+ return(decodeSoundSect1(&ssct, wav));
+ else
+ return(decodeSoundSect(&ssct, wav));
+ }
+ }
+ return(0);
+}
+
+long decodeSoundSect(SoundSector *ssct, char *wav)
+{
+ long count, outputBytes;
+ signed char snddat, filt, range;
+ short decoded;
+ long unit, sample;
+ long sndgrp;
+#if USE_FXD
+ FXD tmp2, tmp3, tmp4, tmp5;
+#else
+ double tmp2, tmp3, tmp4, tmp5;
+#endif
+
+ outputBytes = 0;
+
+ for (sndgrp = 0; sndgrp < kNumOfSGs; sndgrp++)
+ {
+ count = 0;
+ for (unit = 0; unit < 8; unit++)
+ {
+ range = getRange(ssct->SoundGroups[sndgrp], unit);
+ filt = getFilter(ssct->SoundGroups[sndgrp], unit);
+ for (sample = 0; sample < 28; sample++)
+ {
+ snddat = getSoundData(ssct->SoundGroups[sndgrp], unit, sample);
+#if USE_FXD
+ tmp2 = (long)(snddat) << (12 - range);
+ tmp3 = FXD_Pcm16ToFxd(tmp2);
+ tmp4 = FXD_FixMul(K0[filt], t1);
+ tmp5 = FXD_FixMul(K1[filt], t2);
+ t2 = t1;
+ t1 = tmp3 + tmp4 + tmp5;
+ decoded = FXD_FxdToPcm16(t1);
+#else
+ tmp2 = (double)(1 << (12 - range));
+ tmp3 = (double)snddat * tmp2;
+ tmp4 = t1 * K0[filt];
+ tmp5 = t2 * K1[filt];
+ t2 = t1;
+ t1 = tmp3 + tmp4 + tmp5;
+ decoded = DblToPCM(t1);
+#endif
+ wav[outputBytes+count++] = (char)(decoded & 0x0000ffff);
+ wav[outputBytes+count++] = (char)(decoded >> 8);
+ }
+ }
+ outputBytes += count;
+ }
+ return outputBytes;
+}
+
+long decodeSoundSect1(SoundSector *ssct, char *wav)
+{
+ long count, outputBytes;
+ signed char snddat, filt, range;
+ signed char filt1, range1;
+ short decoded;
+ long unit, sample;
+ long sndgrp;
+#if USE_FXD
+ FXD tmp2, tmp3, tmp4, tmp5;
+#else
+ double tmp2, tmp3, tmp4, tmp5;
+#endif
+
+ outputBytes = 0;
+
+ for (sndgrp = 0; sndgrp < kNumOfSGs; sndgrp++)
+ {
+ count = 0;
+ for (unit = 0; unit < 8; unit+= 2)
+ {
+ range = getRange(ssct->SoundGroups[sndgrp], unit);
+ filt = getFilter(ssct->SoundGroups[sndgrp], unit);
+ range1 = getRange(ssct->SoundGroups[sndgrp], unit+1);
+ filt1 = getFilter(ssct->SoundGroups[sndgrp], unit+1);
+
+ for (sample = 0; sample < 28; sample++)
+ {
+ /* Channel 1 */
+ snddat = getSoundData(ssct->SoundGroups[sndgrp], unit, sample);
+#if USE_FXD
+ tmp2 = (long)(snddat) << (12 - range);
+ tmp3 = FXD_Pcm16ToFxd(tmp2);
+ tmp4 = FXD_FixMul(K0[filt], t1);
+ tmp5 = FXD_FixMul(K1[filt], t2);
+ t2 = t1;
+ t1 = tmp3 + tmp4 + tmp5;
+ decoded = FXD_FxdToPcm16(t1);
+#else
+ tmp2 = (double)(1 << (12 - range));
+ tmp3 = (double)snddat * tmp2;
+ tmp4 = t1 * K0[filt];
+ tmp5 = t2 * K1[filt];
+ t2 = t1;
+ t1 = tmp3 + tmp4 + tmp5;
+ decoded = DblToPCM(t1);
+#endif
+ wav[outputBytes + count++] = (char)(decoded & 0x0000ffff);
+ wav[outputBytes + count++] = (char)(decoded >> 8);
+
+ /* Channel 2 */
+ snddat = getSoundData(ssct->SoundGroups[sndgrp], unit+1, sample);
+#if USE_FXD
+ tmp2 = (long)(snddat) << (12 - range1);
+ tmp3 = FXD_Pcm16ToFxd(tmp2);
+ tmp4 = FXD_FixMul(K0[filt1], t1_x);
+ tmp5 = FXD_FixMul(K1[filt1], t2_x);
+ t2_x = t1_x;
+ t1_x = tmp3 + tmp4 + tmp5;
+ decoded = FXD_FxdToPcm16(t1_x);
+#else
+ tmp2 = (double)(1 << (12 - range1));
+ tmp3 = (double)snddat * tmp2;
+ tmp4 = t1_x * K0[filt1];
+ tmp5 = t2_x * K1[filt1];
+ t2_x = t1_x;
+ t1_x = tmp3 + tmp4 + tmp5;
+ decoded = DblToPCM(t1_x);
+#endif
+ wav[outputBytes + count++] = (char)(decoded & 0x0000ffff);
+ wav[outputBytes + count++] = (char)(decoded >> 8);
+ }
+ }
+ outputBytes += count;
+ }
+ return outputBytes;
+}
+
+signed char getSoundData(char *buf, long unit, long sample)
+{
+ signed char ret;
+ char *p;
+ long offset, shift;
+
+ p = buf;
+ shift = (unit%2) * 4;
+
+ offset = 16 + (unit / 2) + (sample * 4);
+ p += offset;
+
+ ret = (*p >> shift) & 0x0F;
+
+ if (ret > 7) {
+ ret -= 16;
+ }
+ return ret;
+}
+
+signed char getFilter(char *buf, long unit)
+{
+ return (*(buf + 4 + unit) >> 4) & 0x03;
+}
+
+
+signed char getRange(char *buf, long unit)
+{
+ return *(buf + 4 + unit) & 0x0F;
+}
+
+#if USE_FXD
+FXD FXD_FixMul(FXD a, FXD b)
+{
+ long high_a, low_a, high_b, low_b;
+ long hahb, halb, lahb;
+ unsigned long lalb;
+ FXD ret;
+
+ high_a = a >> 16;
+ low_a = a & 0x0000FFFF;
+ high_b = b >> 16;
+ low_b = b & 0x0000FFFF;
+
+ hahb = (high_a * high_b) << 16;
+ halb = high_a * low_b;
+ lahb = low_a * high_b;
+ lalb = (unsigned long)(low_a * low_b) >> 16;
+
+ ret = hahb + halb + lahb + lalb;
+
+ return ret;
+}
+#endif
diff --git a/psxdev/xadecode.h b/psxdev/xadecode.h
new file mode 100644
index 0000000..264012c
--- /dev/null
+++ b/psxdev/xadecode.h
@@ -0,0 +1,82 @@
+/*
+ author: unknown, probably bitmaster?
+ slightly modified by dbalster
+*/
+
+#ifndef XADECODE_H
+#define XADECODE_H
+
+#define USE_FXD 1
+
+#define kNumOfSamples 224
+#define kNumOfSGs 18
+
+#define XAFile 0
+#define XAChannel 1
+#define XAType 2
+#define XAFlags 3
+/* bits in XAFlags byte */
+#define XAFStereo 1<<0
+#define XAFHalfHz 1<<2
+
+#define XAAUDIO 0x64
+#define XAVIDEO 0x48
+#define XABREAK 0xE4
+#define XACURRENT 0x100 /* for application use only! */
+#define XANONE 0x200 /* for application use only! */
+#define XAAV 0x400 /* for application use only! */
+
+#define max(a,b) (a<b?b:a)
+#define min(a,b) (a>b?b:a)
+
+#define FXD_FxdToPCM(dt) (max(min((short)((dt)>>16), 32767), -32768))
+#define DblToPCM(dt) (short)(max(min((dt), 32767), -32768))
+
+#define WHP_READ68_AUTO(fp, dt) WHP_Read68(dt, sizeof(*(dt)), 1, fp)
+#define WHP_WRITE68_AUTO(fp, dt) WHP_Write68(dt, sizeof(*(dt)), 1, fp)
+
+#define WHP_CNV_SHORT68(dt, ndt) WHP_CnvEndianShort((dt), (ndt))
+#define WHP_CNV_LONG68(dt, ndt) WHP_CnvEndianLong((dt), (ndt))
+
+#if USE_FXD
+#define FXD_FxdToPcm16(dt) (max(min((dt)/2, 32767), -32768))
+#define FXD_Pcm16ToFxd(dt) ((long)dt*2)
+#endif
+
+#define XAWAVBUFSIZE (kNumOfSamples*kNumOfSGs*2)
+
+typedef char SoundGroup[128];
+
+typedef struct SoundSector {
+ char sectorFiller[8];
+ SoundGroup SoundGroups[kNumOfSGs];
+} __attribute__((packed)) SoundSector;
+
+typedef unsigned long DWORD;
+typedef unsigned short WORD;
+
+#if USE_FXD
+typedef long FXD;
+#endif
+
+long decodeSoundSect(SoundSector *ssct, char *wav);
+long decodeSoundSect1(SoundSector *ssct, char *wav);
+long convXaToWave(char *adp, char *wav, int cn, int fn_s, int fn_e);
+void initXaDecode(void);
+void switchXaDecode(int channel);
+void saveXaDecode(int channel);
+void reinitXaDecode(int channel);
+signed char getSoundData(char *buf, long unit, long sample);
+signed char getFilter(char *buf, long unit);
+signed char getRange(char *buf, long unit);
+char xachannel(SoundSector *ss);
+unsigned char xatype(SoundSector *ss);
+char xafileno(SoundSector *ss);
+char xastereo(SoundSector *ss);
+char xahalfhz(SoundSector *ss);
+
+#if USE_FXD
+FXD FXD_FixMul(FXD a, FXD b);
+#endif
+
+#endif
diff --git a/str-util.cpp b/str-util.cpp
index 3588707..67f20b1 100644
--- a/str-util.cpp
+++ b/str-util.cpp
@@ -1,6 +1,8 @@
#include <stdlib.h>
#include <string.h>
-//#include "psxdev/bs.h"
+#include <SDL/SDL.h>
+#include <SDL/SDL_audio.h>
+#include "psxdev/bs.h"
#include "fileutils.h"
#include "generic.h"
#include "cdutils.h"
@@ -41,19 +43,26 @@ struct STR_Header {
Byte * video = 0, * audio = 0;
+int width, height;
+
+SDL_Surface * screen = 0;
+Uint8 bpp;
+
+extern void mixaudio(void *unused, Uint8 *stream, int len);
+
void process_one_sector(FILE * f) {
Byte sector[2336];
STR_Header * h;
fread(sector, 2336, 1, f);
h = (STR_Header *) ((Byte *) sector + 8);
-
+
printm(M_BARE, "SubHeader FN : %x\n", sector[0]);
printm(M_BARE, "SubHeader CN : %x\n", sector[1]);
printm(M_BARE, "SubHeader SM : %x\n", sector[2]);
printm(M_BARE, "SubHeader CI : %x\n", sector[3]);
-
- if (sector[2] == 0x48) {
+
+ if ((sector[2] == 0x48) || (sector[2] == 0x42)) {
printm(M_BARE, "Video sector\n");
printm(M_BARE, "Status : %04x\n", h->StSTATUS);
printm(M_BARE, "Type : %04x\n", h->StTYPE);
@@ -68,6 +77,17 @@ void process_one_sector(FILE * f) {
printm(M_BARE, "Channels : %04x\n", h->Channels);
if (h->StSECTOR_OFFSET == 0) {
video = (Byte *) malloc(h->StSECTOR_SIZE * 2016);
+ if (!screen) {
+ bs_init();
+ width = h->StMOVIE_WIDTH;
+ height = h->StMOVIE_HEIGHT;
+ screen = SDL_SetVideoMode(width, height, 24, SDL_HWSURFACE | SDL_DOUBLEBUF);
+ if (!screen) {
+ printm(M_ERROR, "Couldn't get framebuffer\n");
+ exit(-1);
+ }
+ bpp = screen->format->BytesPerPixel;
+ }
}
memcpy(video + h->StSECTOR_OFFSET * 2016, sector + 40, 2016);
@@ -76,19 +96,83 @@ void process_one_sector(FILE * f) {
// Frame finished.
printm(M_BARE, "End of Frame.\n");
+ Uint8 * buffer = ((Uint8 *) screen->pixels);
+
+ if (SDL_MUSTLOCK(screen))
+ if (SDL_LockSurface(screen) < 0)
+ exit(1);
+ printm(M_BARE, "Width: %i, Height: %i - bpp: %i\n", width, height, bpp);
+ bs_decode_rgb24(buffer, (bs_header_t *) video, width, height, 0);
+
+// fwrite(screen->pixels, 3, width * height, stdout);
+
+ if (SDL_MUSTLOCK(screen))
+ SDL_UnlockSurface(screen);
+ SDL_Flip(screen);
+
free(video);
}
-
} else if (sector[2] == 0x64) {
+ SoundSector * buffer = (SoundSector *) sector);
printm(M_BARE, "Audio sector\n");
+ printm(M_BARE, "Frequency: %i\n", xahalfhz(buffer) ? 18900 : 37800);
+ printm(M_BARE, "Channels : %s\n", xastereo(buffer) ? "stereo" : "mono");
+// fwrite(sector + 8, 1, 2324, stdout);
+ if (!audio) {
+ SDL_AudioSpec fmt;
+
+ /* Un son sereo de 16 bits 44kHz */
+ fmt.freq = xahalfhz(&buffer)?"18900":"37800";
+ fmt.format = AUDIO_S16;
+ fmt.channels = 2;
+ fmt.samples = 512; /*Une bonne valeur pour les jeux */
+ fmt.callback = mixaudio;
+ fmt.userdata = NULL;
+
+ /* Ouvre le contexte audio et joue le son */
+ if ( SDL_OpenAudio(&fmt, NULL) < 0 ) {
+ fprintf(stderr, "Impossible d'acce'der a` l'audio: %s\n", SDL_GetError());
+ exit(1);
+ }
+ SDL_PauseAudio(0);
+
+ } else {
+ free(audio);
+ }
+ audio = (Byte *) malloc(2336);
} else {
printm(M_BARE, "Unknow sector\n");
}
printm(M_BARE, "---------------------------------\n\n");
}
-int main(void) {
+int main(int argc, char ** argv) {
+ if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER) < 0) {
+ printm(M_ERROR, "Couldn't initialise SDL: %s\n", SDL_GetError());
+ exit(-1);
+ }
+ atexit(SDL_Quit);
+ SDL_ShowCursor(SDL_DISABLE);
+
+
+ switch (argc) {
+ case 1:
+ break;
+ case 2:
+ fclose(stdin);
+ stdin = fopen(argv[1], "r");
+ break;
+ default:
+ printm(M_ERROR, "Too much arguments.\n");
+ exit(-1);
+ }
+
while (!feof(stdin)) {
process_one_sector(stdin);
}
+
+ if (!audio)
+ SDL_CloseAudio();
+
+ SDL_Quit();
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-25 00:56:41 +0000