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