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(truncated) unary binerization

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unary k-th order exp golomb binarization

Originally committed as revision 1920 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
2003-05-30 01:05:48 +00:00
parent cf713bb862
commit 61ccfcc009
2 changed files with 169 additions and 9 deletions
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libavcodec/cabac.c
+35 -9
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@@ -127,49 +127,75 @@ void ff_init_cabac_states(CABACContext *c, uint8_t const (*lps_range)[4],
int main(){
CABACContext c;
uint8_t b[9*SIZE];
uint8_t bit[9*SIZE];
uint8_t r[9*SIZE];
int i;
uint8_t state= 0;
uint8_t state[10]= {0};
ff_init_cabac_encoder(&c, b, SIZE);
ff_init_cabac_states(&c, ff_h264_lps_range, ff_h264_mps_state, ff_h264_lps_state, 64);
for(i=0; i<SIZE; i++){
bit[i]= (random()%7)&1;
r[i]= random()%7;
}
for(i=0; i<SIZE; i++){
START_TIMER
put_cabac_bypass(&c, bit[i]);
put_cabac_bypass(&c, r[i]&1);
STOP_TIMER("put_cabac_bypass")
}
for(i=0; i<SIZE; i++){
START_TIMER
put_cabac(&c, &state, bit[i]);
put_cabac(&c, state, r[i]&1);
STOP_TIMER("put_cabac")
}
for(i=0; i<SIZE; i++){
START_TIMER
put_cabac_u(&c, state, r[i], 6, 3, i&1);
STOP_TIMER("put_cabac_u")
}
for(i=0; i<SIZE; i++){
START_TIMER
put_cabac_ueg(&c, state, r[i], 0, 3, 0, 1, 2);
STOP_TIMER("put_cabac_ueg")
}
put_cabac_terminate(&c, 1);
ff_init_cabac_decoder(&c, b, SIZE);
state=0;
memset(state, 0, sizeof(state));
for(i=0; i<SIZE; i++){
START_TIMER
if( bit[i] != get_cabac_bypass(&c) )
if( (r[i]&1) != get_cabac_bypass(&c) )
printf("CABAC bypass failure at %d\n", i);
STOP_TIMER("get_cabac_bypass")
}
for(i=0; i<SIZE; i++){
START_TIMER
if( bit[i] != get_cabac(&c, &state) )
if( (r[i]&1) != get_cabac(&c, state) )
printf("CABAC failure at %d\n", i);
STOP_TIMER("get_cabac")
}
for(i=0; i<SIZE; i++){
START_TIMER
if( r[i] != get_cabac_u(&c, state, (i&1) ? 6 : 7, 3, i&1) )
printf("CABAC unary (truncated) binarization failure at %d\n", i);
STOP_TIMER("get_cabac_u")
}
for(i=0; i<SIZE; i++){
START_TIMER
if( r[i] != get_cabac_ueg(&c, state, 3, 0, 1, 2))
printf("CABAC unary (truncated) binarization failure at %d\n", i);
STOP_TIMER("get_cabac_ueg")
}
if(!get_cabac_terminate(&c))
printf("where's the Terminator?\n");