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Merge "Speed up VP8DX_BOOL_DECODER_FILL"

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John Koleszar 2011-04-27 09:03:45 -07:00 committed by Code Review
commit 64355ecad3
1 changed files with 16 additions and 9 deletions
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25
vp8/decoder/dboolhuff.h
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@ -51,19 +51,26 @@ void vp8dx_bool_decoder_fill(BOOL_DECODER *br);
#define VP8DX_BOOL_DECODER_FILL(_count,_value,_bufptr,_bufend) \
do \
{ \
int shift; \
for(shift = VP8_BD_VALUE_SIZE - 8 - ((_count) + 8); shift >= 0; ) \
int shift = VP8_BD_VALUE_SIZE - 8 - ((_count) + 8); \
int loop_end, x; \
size_t bits_left = ((_bufend)-(_bufptr))*CHAR_BIT; \
\
x = shift + CHAR_BIT - bits_left; \
loop_end = 0; \
if(x >= 0) \
{ \
if((_bufptr) >= (_bufend)) { \
(_count) += VP8_LOTS_OF_BITS; \
break; \
} \
(_count) += 8; \
(_count) += VP8_LOTS_OF_BITS; \
loop_end = x; \
if(!bits_left) break; \
} \
while(shift >= loop_end) \
{ \
(_count) += CHAR_BIT; \
(_value) |= (VP8_BD_VALUE)*(_bufptr)++ << shift; \
shift -= 8; \
shift -= CHAR_BIT; \
} \
} \
while(0)
while(0) \
static int vp8dx_decode_bool(BOOL_DECODER *br, int probability) {