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Code Issues Releases Activity

fix 4xm yuv->rgb565 transform

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Originally committed as revision 1925 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2003-06-01 10:56:36 +00:00
parent 5be8a3737b
commit b60ad448de
1 changed files with 15 additions and 9 deletions
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24
libavcodec/4xm.c
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@ -416,32 +416,38 @@ static inline void idct_put(FourXContext *f, int x, int y){
int stride= f->current_picture.linesize[0]>>1;
int i;
uint16_t *dst = ((uint16_t*)f->current_picture.data[0]) + y * stride + x;
for(i=0; i<4; i++){
block[i][0] += 0x80*8*8;
idct(block[i]);
}
for(i=0; i<6; i++) idct(block[i]);
if(!(f->avctx->flags&CODEC_FLAG_GRAY)){
for(i=4; i<6; i++) idct(block[i]);
}
for(y=0; y<8; y++){
for(x=0; x<8; x++){
DCTELEM *temp= block[(x>>2) + 2*(y>>2)] + 2*(x&3) + 2*8*(y&3); //FIXME optimize
int cb= block[4][x + 8*y] + 0x80;
int cr= block[5][x + 8*y] + 0x80;
int cb= block[4][x + 8*y];
int cr= block[5][x + 8*y];
int cg= (cb + cr)>>1;
int y;
cb+=cb - 0x80;
cb+=cb;
y = temp[0];
dst[0 ]= ((y+cb)>>3) + (((y+cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8);
dst[0 ]= ((y+cb)>>3) + (((y-cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8);
y = temp[1];
dst[1 ]= ((y+cb)>>3) + (((y+cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8);
dst[1 ]= ((y+cb)>>3) + (((y-cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8);
y = temp[8];
dst[ stride]= ((y+cb)>>3) + (((y+cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8);
dst[ stride]= ((y+cb)>>3) + (((y-cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8);
y = temp[9];
dst[1+stride]= ((y+cb)>>3) + (((y+cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8);
dst[1+stride]= ((y+cb)>>3) + (((y-cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8);
dst += 2;
}
dst += 2*stride - 2*8;
}
// if(!(f->avctx->flags&CODEC_FLAG_GRAY)){
}
static int decode_i_mb(FourXContext *f){