ref: a6631746659a7d54bc342b1d7e56bbce1b6305a1
dir: /libentcode/ectest.c/
#include <stdio.h>
#include <math.h>
#include "probenc.h"
#include "probdec.h"
#include "bitrenc.h"
int main(int _argc,char **_argv){
ec_byte_buffer buf;
ec_enc enc;
ec_dec dec;
ec_probmod mod;
ec_uint64 sym64;
long nbits;
long nbits2;
double entropy;
int ft;
int ftb;
int sym;
int sz;
int s;
int i;
entropy=0;
/*Testing encoding of raw bit values.*/
ec_byte_writeinit(&buf);
ec_enc_init(&enc,&buf);
for(ft=0;ft<1024;ft++){
for(i=0;i<ft;i++){
entropy+=log(ft)*M_LOG2E;
ec_enc_uint(&enc,i,ft);
entropy+=log(ft)*M_LOG2E+30;
ec_enc_uint64(&enc,(ec_uint64)i<<30|i,(ec_uint64)ft<<30);
}
}
/*Testing encoding of raw bit values.*/
for(ftb=0;ftb<16;ftb++){
for(i=0;i<(1<<ftb);i++){
entropy+=ftb;
nbits=ec_enc_tell(&enc,0);
ec_enc_bits(&enc,i,ftb);
nbits2=ec_enc_tell(&enc,0);
if(nbits2-nbits!=ftb){
fprintf(stderr,"Used %li bits to encode %i bits directly.\n",
nbits2-nbits,ftb);
}
entropy+=ftb+30;
nbits=nbits2;
ec_enc_bits64(&enc,(ec_uint64)i<<30|i,ftb+30);
nbits2=ec_enc_tell(&enc,0);
if(nbits2-nbits!=ftb+30){
fprintf(stderr,"Used %li bits to encode %i bits directly.\n",
nbits2-nbits,ftb+30);
}
}
}
for(sz=1;sz<256;sz++){
ec_probmod_init_full(&mod,sz,1,sz+(sz>>1),NULL);
for(i=0;i<sz;i++){
s=((unsigned)(i*45678901+7))%sz;
entropy+=(log(mod.ft)-log(ec_bitree_get_freq(mod.bitree,s)))*M_LOG2E;
ec_probmod_write(&mod,&enc,s);
}
ec_probmod_clear(&mod);
}
for(sz=11;sz<256;sz++){
ec_probmod_init_full(&mod,sz,1,sz+(sz>>1),NULL);
for(i=0;i<sz;i++){
s=((unsigned)(i*45678901+7))%sz;
entropy+=(log(ec_bitree_get_cumul(mod.bitree,EC_MINI(s+6,sz))-
ec_bitree_get_cumul(mod.bitree,EC_MAXI(s-5,0)))-
log(ec_bitree_get_freq(mod.bitree,s)))*M_LOG2E;
ec_probmod_write_range(&mod,&enc,s,EC_MAXI(s-5,0),EC_MINI(s+6,sz));
}
ec_probmod_clear(&mod);
}
nbits=ec_enc_tell(&enc,4);
ec_enc_done(&enc);
fprintf(stderr,
"Encoded %0.2lf bits of entropy to %0.2lf bits (%0.3lf%% wasted).\n",
entropy,ldexp(nbits,-4),100*(nbits-ldexp(entropy,4))/nbits);
fprintf(stderr,"Packed to %li bytes.\n",(long)(buf.ptr-buf.buf));
ec_byte_readinit(&buf,ec_byte_get_buffer(&buf),ec_byte_bytes(&buf));
ec_dec_init(&dec,&buf);
for(ft=0;ft<1024;ft++){
for(i=0;i<ft;i++){
sym=ec_dec_uint(&dec,ft);
if(sym!=i){
fprintf(stderr,"Decoded %i instead of %i with ft of %i.\n",sym,i,ft);
return -1;
}
sym64=ec_dec_uint64(&dec,(ec_uint64)ft<<30);
if(sym64!=((ec_uint64)i<<30|i)){
fprintf(stderr,"Decoded %lli instead of %lli with ft of %lli.\n",sym64,
(ec_uint64)i<<30|i,(ec_uint64)ft<<30);
}
}
}
for(ftb=0;ftb<16;ftb++){
for(i=0;i<(1<<ftb);i++){
sym=ec_dec_bits(&dec,ftb);
if(sym!=i){
fprintf(stderr,"Decoded %i instead of %i with ftb of %i.\n",sym,i,ftb);
return -1;
}
sym64=ec_dec_bits64(&dec,ftb+30);
if(sym64!=((ec_uint64)i<<30|i)){
fprintf(stderr,"Decoded %lli instead of %lli with ftb of %i.\n",
sym64,(ec_uint64)i<<30|i,ftb+30);
}
}
}
for(sz=1;sz<256;sz++){
ec_probmod_init_full(&mod,sz,1,sz+(sz>>1),NULL);
for(i=0;i<sz;i++){
s=((unsigned)(i*45678901+7))%sz;
sym=ec_probmod_read(&mod,&dec);
if(sym!=s){
fprintf(stderr,"Decoded %i instead of %i with sz of %i.\n",sym,s,sz);
return -1;
}
}
ec_probmod_clear(&mod);
}
for(sz=11;sz<256;sz++){
ec_probmod_init_full(&mod,sz,1,sz+(sz>>1),NULL);
for(i=0;i<sz;i++){
s=((unsigned)(i*45678901+7))%sz;
sym=ec_probmod_read_range(&mod,&dec,EC_MAXI(s-5,0),EC_MINI(s+6,sz));
if(sym!=s){
fprintf(stderr,"Decoded %i instead of %i with sz of %i.\n",sym,s,sz);
return -1;
}
}
ec_probmod_clear(&mod);
}
nbits2=ec_dec_tell(&dec,4);
if(nbits!=nbits2){
fprintf(stderr,
"Reported number of bits used was %0.2lf, should be %0.2lf.\n",
ldexp(nbits2,-4),ldexp(nbits,-4));
}
ec_byte_writeclear(&buf);
fprintf(stderr,"All tests passed.\n");
return 0;
}