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Fix (rewrite) find_group3_syncmarker().

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Originally committed as revision 16325 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-12-26 13:46:11 +00:00
parent 44fe71133d
commit eb12536a31
1 changed files with 7 additions and 7 deletions
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14
libavcodec/faxcompr.c
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@ -251,14 +251,14 @@ static void put_line(uint8_t *dst, int size, int width, const int *runs)
static int find_group3_syncmarker(GetBitContext *gb, int srcsize) static int find_group3_syncmarker(GetBitContext *gb, int srcsize)
{ {
int state = get_bits(gb, 12); unsigned int state = -1;
int rem = srcsize - get_bits_count(gb); srcsize -= get_bits_count(gb);
while((state & 0xFFF) != 1){ while(srcsize-- > 0){
state = (state << 1) | get_bits1(gb); state+= state + get_bits1(gb);
if(--rem <= 0) if((state & 0xFFF) != 1)
return -1; return 0;
} }
return 0; return -1;
} }
int ff_ccitt_unpack_1d(AVCodecContext *avctx, int ff_ccitt_unpack_1d(AVCodecContext *avctx,