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fix decoding of dracula.4xm before diego complains 

Originally committed as revision 10393 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-09-05 01:21:32 +00:00
parent f9f835ee89
commit c08bbe6c57
1 changed files with 7 additions and 7 deletions
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14
libavcodec/4xm.c
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@ -249,7 +249,7 @@ static void init_mv(FourXContext *f){
int i;
for(i=0; i<256; i++){
if(f->version)
if(f->version>1)
f->mv[i] = mv[i][0] + mv[i][1] *f->current_picture.linesize[0]/2;
else
f->mv[i] = (i&15) - 8 + ((i>>4)-8)*f->current_picture.linesize[0]/2;
@ -300,7 +300,7 @@ static inline void mcdc(uint16_t *dst, uint16_t *src, int log2w, int h, int stri
static void decode_p_block(FourXContext *f, uint16_t *dst, uint16_t *src, int log2w, int log2h, int stride){
const int index= size2index[log2h][log2w];
const int h= 1<<log2h;
int code= get_vlc2(&f->gb, block_type_vlc[1-f->version][index].table, BLOCK_TYPE_VLC_BITS, 1);
int code= get_vlc2(&f->gb, block_type_vlc[1-(f->version>1)][index].table, BLOCK_TYPE_VLC_BITS, 1);
uint16_t *start= f->last_picture.data[0];
uint16_t *end= start + stride*(f->avctx->height-h+1) - (1<<log2w);
@ -321,7 +321,7 @@ static void decode_p_block(FourXContext *f, uint16_t *dst, uint16_t *src, int lo
log2w--;
decode_p_block(f, dst , src , log2w, log2h, stride);
decode_p_block(f, dst + (1<<log2w), src + (1<<log2w), log2w, log2h, stride);
}else if(code == 3 && f->version==0){
}else if(code == 3 && f->version<2){
mcdc(dst, src, log2w, h, stride, 1, 0);
}else if(code == 4){
src += f->mv[ *f->bytestream++ ];
@ -356,7 +356,7 @@ static int decode_p_frame(FourXContext *f, uint8_t *buf, int length){
const int stride= f->current_picture.linesize[0]>>1;
unsigned int bitstream_size, bytestream_size, wordstream_size, extra;
if(f->version){
if(f->version>1){
extra=20;
bitstream_size= get32(buf+8);
wordstream_size= get32(buf+12);
@ -804,12 +804,12 @@ static int decode_init(AVCodecContext *avctx){
return 1;
}
f->version= AV_RL32(avctx->extradata) == 0x40000;
f->version= AV_RL32(avctx->extradata)>>16;
common_init(avctx);
init_vlcs(f);
if(f->version) avctx->pix_fmt= PIX_FMT_RGB565;
else avctx->pix_fmt= PIX_FMT_RGB555;
if(f->version>2) avctx->pix_fmt= PIX_FMT_RGB565;
else avctx->pix_fmt= PIX_FMT_RGB555;
return 0;
}