382 lines
12 KiB
C
Executable file
382 lines
12 KiB
C
Executable file
/* Copyright (c) 2007-2011 Xiph.Org Foundation, Mozilla Corporation,
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Gregory Maxwell
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Written by Jean-Marc Valin, Gregory Maxwell, and Timothy B. Terriberry */
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include <math.h>
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#include <time.h>
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#include "entcode.h"
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#include "entenc.h"
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#include "entdec.h"
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#include <string.h>
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#include "entenc.c"
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#include "entdec.c"
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#include "entcode.c"
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#ifndef M_LOG2E
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# define M_LOG2E 1.4426950408889634074
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#endif
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#define DATA_SIZE 10000000
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#define DATA_SIZE2 10000
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int main(int _argc,char **_argv){
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ec_enc enc;
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ec_dec dec;
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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 sz;
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int i;
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int ret;
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unsigned int sym;
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unsigned int seed;
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unsigned char *ptr;
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const char *env_seed;
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ret=0;
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entropy=0;
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if (_argc > 2) {
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fprintf(stderr, "Usage: %s [<seed>]\n", _argv[0]);
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return 1;
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}
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env_seed = getenv("SEED");
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if (_argc > 1)
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seed = atoi(_argv[1]);
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else if (env_seed)
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seed = atoi(env_seed);
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else
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seed = time(NULL);
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/*Testing encoding of raw bit values.*/
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ptr = (unsigned char *)malloc(DATA_SIZE);
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ec_enc_init(&enc,ptr, DATA_SIZE);
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for(ft=2;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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}
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}
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/*Testing encoding of raw bit values.*/
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for(ftb=1;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_tell(&enc);
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ec_enc_bits(&enc,i,ftb);
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nbits2=ec_tell(&enc);
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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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ret=-1;
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}
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}
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}
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nbits=ec_tell_frac(&enc);
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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,-3),100*(nbits-ldexp(entropy,3))/nbits);
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fprintf(stderr,"Packed to %li bytes.\n",(long)ec_range_bytes(&enc));
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ec_dec_init(&dec,ptr,DATA_SIZE);
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for(ft=2;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!=(unsigned)i){
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fprintf(stderr,"Decoded %i instead of %i with ft of %i.\n",sym,i,ft);
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ret=-1;
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}
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}
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}
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for(ftb=1;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!=(unsigned)i){
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fprintf(stderr,"Decoded %i instead of %i with ftb of %i.\n",sym,i,ftb);
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ret=-1;
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}
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}
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}
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nbits2=ec_tell_frac(&dec);
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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,-3),ldexp(nbits,-3));
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ret=-1;
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}
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/*Testing an encoder bust prefers range coder data over raw bits.
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This isn't a general guarantee, will only work for data that is buffered in
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the encoder state and not yet stored in the user buffer, and should never
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get used in practice.
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It's mostly here for code coverage completeness.*/
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/*Start with a 16-bit buffer.*/
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ec_enc_init(&enc,ptr,2);
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/*Write 7 raw bits.*/
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ec_enc_bits(&enc,0x55,7);
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/*Write 12.3 bits of range coder data.*/
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ec_enc_uint(&enc,1,2);
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ec_enc_uint(&enc,1,3);
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ec_enc_uint(&enc,1,4);
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ec_enc_uint(&enc,1,5);
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ec_enc_uint(&enc,2,6);
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ec_enc_uint(&enc,6,7);
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ec_enc_done(&enc);
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ec_dec_init(&dec,ptr,2);
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if(!enc.error
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/*The raw bits should have been overwritten by the range coder data.*/
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||ec_dec_bits(&dec,7)!=0x05
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/*And all the range coder data should have been encoded correctly.*/
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||ec_dec_uint(&dec,2)!=1
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||ec_dec_uint(&dec,3)!=1
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||ec_dec_uint(&dec,4)!=1
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||ec_dec_uint(&dec,5)!=1
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||ec_dec_uint(&dec,6)!=2
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||ec_dec_uint(&dec,7)!=6){
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fprintf(stderr,"Encoder bust overwrote range coder data with raw bits.\n");
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ret=-1;
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}
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srand(seed);
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fprintf(stderr,"Testing random streams... Random seed: %u (%.4X)\n", seed, rand() % 65536);
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for(i=0;i<409600;i++){
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unsigned *data;
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unsigned *tell;
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unsigned tell_bits;
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int j;
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int zeros;
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ft=rand()/((RAND_MAX>>(rand()%11U))+1U)+10;
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sz=rand()/((RAND_MAX>>(rand()%9U))+1U);
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data=(unsigned *)malloc(sz*sizeof(*data));
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tell=(unsigned *)malloc((sz+1)*sizeof(*tell));
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ec_enc_init(&enc,ptr,DATA_SIZE2);
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zeros = rand()%13==0;
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tell[0]=ec_tell_frac(&enc);
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for(j=0;j<sz;j++){
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if (zeros)
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data[j]=0;
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else
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data[j]=rand()%ft;
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ec_enc_uint(&enc,data[j],ft);
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tell[j+1]=ec_tell_frac(&enc);
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}
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if (rand()%2==0)
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while(ec_tell(&enc)%8 != 0)
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ec_enc_uint(&enc, rand()%2, 2);
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tell_bits = ec_tell(&enc);
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ec_enc_done(&enc);
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if(tell_bits!=(unsigned)ec_tell(&enc)){
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fprintf(stderr,"ec_tell() changed after ec_enc_done(): %i instead of %i (Random seed: %u)\n",
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ec_tell(&enc),tell_bits,seed);
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ret=-1;
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}
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if ((tell_bits+7)/8 < ec_range_bytes(&enc))
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{
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fprintf (stderr, "ec_tell() lied, there's %i bytes instead of %d (Random seed: %u)\n",
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ec_range_bytes(&enc), (tell_bits+7)/8,seed);
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ret=-1;
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}
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ec_dec_init(&dec,ptr,DATA_SIZE2);
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if(ec_tell_frac(&dec)!=tell[0]){
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fprintf(stderr,
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"Tell mismatch between encoder and decoder at symbol %i: %i instead of %i (Random seed: %u).\n",
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0,ec_tell_frac(&dec),tell[0],seed);
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}
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for(j=0;j<sz;j++){
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sym=ec_dec_uint(&dec,ft);
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if(sym!=data[j]){
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fprintf(stderr,
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"Decoded %i instead of %i with ft of %i at position %i of %i (Random seed: %u).\n",
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sym,data[j],ft,j,sz,seed);
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ret=-1;
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}
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if(ec_tell_frac(&dec)!=tell[j+1]){
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fprintf(stderr,
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"Tell mismatch between encoder and decoder at symbol %i: %i instead of %i (Random seed: %u).\n",
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j+1,ec_tell_frac(&dec),tell[j+1],seed);
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}
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}
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free(tell);
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free(data);
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}
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/*Test compatibility between multiple different encode/decode routines.*/
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for(i=0;i<409600;i++){
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unsigned *logp1;
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unsigned *data;
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unsigned *tell;
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unsigned *enc_method;
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int j;
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sz=rand()/((RAND_MAX>>(rand()%9U))+1U);
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logp1=(unsigned *)malloc(sz*sizeof(*logp1));
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data=(unsigned *)malloc(sz*sizeof(*data));
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tell=(unsigned *)malloc((sz+1)*sizeof(*tell));
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enc_method=(unsigned *)malloc(sz*sizeof(*enc_method));
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ec_enc_init(&enc,ptr,DATA_SIZE2);
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tell[0]=ec_tell_frac(&enc);
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for(j=0;j<sz;j++){
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data[j]=rand()/((RAND_MAX>>1)+1);
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logp1[j]=(rand()%15)+1;
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enc_method[j]=rand()/((RAND_MAX>>2)+1);
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switch(enc_method[j]){
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case 0:{
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ec_encode(&enc,data[j]?(1<<logp1[j])-1:0,
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(1<<logp1[j])-(data[j]?0:1),1<<logp1[j]);
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}break;
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case 1:{
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ec_encode_bin(&enc,data[j]?(1<<logp1[j])-1:0,
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(1<<logp1[j])-(data[j]?0:1),logp1[j]);
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}break;
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case 2:{
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ec_enc_bit_logp(&enc,data[j],logp1[j]);
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}break;
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case 3:{
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unsigned char icdf[2];
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icdf[0]=1;
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icdf[1]=0;
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ec_enc_icdf(&enc,data[j],icdf,logp1[j]);
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}break;
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}
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tell[j+1]=ec_tell_frac(&enc);
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}
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ec_enc_done(&enc);
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if((ec_tell(&enc)+7U)/8U<ec_range_bytes(&enc)){
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fprintf(stderr,"tell() lied, there's %i bytes instead of %d (Random seed: %u)\n",
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ec_range_bytes(&enc),(ec_tell(&enc)+7)/8,seed);
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ret=-1;
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}
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ec_dec_init(&dec,ptr,DATA_SIZE2);
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if(ec_tell_frac(&dec)!=tell[0]){
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fprintf(stderr,
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"Tell mismatch between encoder and decoder at symbol %i: %i instead of %i (Random seed: %u).\n",
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0,ec_tell_frac(&dec),tell[0],seed);
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}
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for(j=0;j<sz;j++){
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int fs;
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int dec_method;
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dec_method=rand()/((RAND_MAX>>2)+1);
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switch(dec_method){
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case 0:{
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fs=ec_decode(&dec,1<<logp1[j]);
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sym=fs>=(1<<logp1[j])-1;
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ec_dec_update(&dec,sym?(1<<logp1[j])-1:0,
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(1<<logp1[j])-(sym?0:1),1<<logp1[j]);
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}break;
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case 1:{
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fs=ec_decode_bin(&dec,logp1[j]);
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sym=fs>=(1<<logp1[j])-1;
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ec_dec_update(&dec,sym?(1<<logp1[j])-1:0,
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(1<<logp1[j])-(sym?0:1),1<<logp1[j]);
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}break;
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case 2:{
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sym=ec_dec_bit_logp(&dec,logp1[j]);
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}break;
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case 3:{
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unsigned char icdf[2];
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icdf[0]=1;
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icdf[1]=0;
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sym=ec_dec_icdf(&dec,icdf,logp1[j]);
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}break;
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}
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if(sym!=data[j]){
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fprintf(stderr,
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"Decoded %i instead of %i with logp1 of %i at position %i of %i (Random seed: %u).\n",
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sym,data[j],logp1[j],j,sz,seed);
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fprintf(stderr,"Encoding method: %i, decoding method: %i\n",
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enc_method[j],dec_method);
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ret=-1;
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}
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if(ec_tell_frac(&dec)!=tell[j+1]){
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fprintf(stderr,
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"Tell mismatch between encoder and decoder at symbol %i: %i instead of %i (Random seed: %u).\n",
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j+1,ec_tell_frac(&dec),tell[j+1],seed);
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}
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}
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free(enc_method);
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free(tell);
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free(data);
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free(logp1);
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}
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ec_enc_init(&enc,ptr,DATA_SIZE2);
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ec_enc_bit_logp(&enc,0,1);
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ec_enc_bit_logp(&enc,0,1);
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ec_enc_bit_logp(&enc,0,1);
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ec_enc_bit_logp(&enc,0,1);
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ec_enc_bit_logp(&enc,0,2);
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ec_enc_patch_initial_bits(&enc,3,2);
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if(enc.error){
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fprintf(stderr,"patch_initial_bits failed");
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ret=-1;
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}
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ec_enc_patch_initial_bits(&enc,0,5);
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if(!enc.error){
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fprintf(stderr,"patch_initial_bits didn't fail when it should have");
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ret=-1;
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}
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ec_enc_done(&enc);
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if(ec_range_bytes(&enc)!=1||ptr[0]!=192){
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fprintf(stderr,"Got %d when expecting 192 for patch_initial_bits",ptr[0]);
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ret=-1;
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}
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ec_enc_init(&enc,ptr,DATA_SIZE2);
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ec_enc_bit_logp(&enc,0,1);
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ec_enc_bit_logp(&enc,0,1);
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ec_enc_bit_logp(&enc,1,6);
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ec_enc_bit_logp(&enc,0,2);
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ec_enc_patch_initial_bits(&enc,0,2);
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if(enc.error){
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fprintf(stderr,"patch_initial_bits failed");
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ret=-1;
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}
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ec_enc_done(&enc);
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if(ec_range_bytes(&enc)!=2||ptr[0]!=63){
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fprintf(stderr,"Got %d when expecting 63 for patch_initial_bits",ptr[0]);
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ret=-1;
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}
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ec_enc_init(&enc,ptr,2);
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ec_enc_bit_logp(&enc,0,2);
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for(i=0;i<48;i++){
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ec_enc_bits(&enc,0,1);
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}
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ec_enc_done(&enc);
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if(!enc.error){
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fprintf(stderr,"Raw bits overfill didn't fail when it should have");
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ret=-1;
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}
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ec_enc_init(&enc,ptr,2);
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for(i=0;i<17;i++){
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ec_enc_bits(&enc,0,1);
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}
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ec_enc_done(&enc);
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if(!enc.error){
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fprintf(stderr,"17 raw bits encoded in two bytes");
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ret=-1;
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}
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free(ptr);
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return ret;
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}
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