Add copy of opus library in deps/third_party.

opus/celt/tests/test_unit_entropy.c

+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+#include <time.h>
+#include "entcode.h"
+#include "entenc.h"
+#include "entdec.h"
+#include <string.h>
+
+#include "entenc.c"
+#include "entdec.c"
+#include "entcode.c"
+
+#ifndef M_LOG2E
+# define M_LOG2E    1.4426950408889634074
+#endif
+#define DATA_SIZE 10000000
+#define DATA_SIZE2 10000
+
+int main(int _argc,char **_argv){
+  ec_enc         enc;
+  ec_dec         dec;
+  long           nbits;
+  long           nbits2;
+  double         entropy;
+  int            ft;
+  int            ftb;
+  int            sz;
+  int            i;
+  int            ret;
+  unsigned int   sym;
+  unsigned int   seed;
+  unsigned char *ptr;
+  const char    *env_seed;
+  ret=0;
+  entropy=0;
+    if (_argc > 2) {
+        fprintf(stderr, "Usage: %s [<seed>]\n", _argv[0]);
+        return 1;
+    }
+  env_seed = getenv("SEED");
+  if (_argc > 1)
+    seed = atoi(_argv[1]);
+  else if (env_seed)
+    seed = atoi(env_seed);
+  else
+    seed = time(NULL);
+  /*Testing encoding of raw bit values.*/
+  ptr = (unsigned char *)malloc(DATA_SIZE);
+  ec_enc_init(&enc,ptr, DATA_SIZE);
+  for(ft=2;ft<1024;ft++){
+    for(i=0;i<ft;i++){
+      entropy+=log(ft)*M_LOG2E;
+      ec_enc_uint(&enc,i,ft);
+    }
+  }
+  /*Testing encoding of raw bit values.*/
+  for(ftb=1;ftb<16;ftb++){
+    for(i=0;i<(1<<ftb);i++){
+      entropy+=ftb;
+      nbits=ec_tell(&enc);
+      ec_enc_bits(&enc,i,ftb);
+      nbits2=ec_tell(&enc);
+      if(nbits2-nbits!=ftb){
+        fprintf(stderr,"Used %li bits to encode %i bits directly.\n",
+         nbits2-nbits,ftb);
+        ret=-1;
+      }
+    }
+  }
+  nbits=ec_tell_frac(&enc);
+  ec_enc_done(&enc);
+  fprintf(stderr,
+   "Encoded %0.2lf bits of entropy to %0.2lf bits (%0.3lf%% wasted).\n",
+   entropy,ldexp(nbits,-3),100*(nbits-ldexp(entropy,3))/nbits);
+  fprintf(stderr,"Packed to %li bytes.\n",(long)ec_range_bytes(&enc));
+  ec_dec_init(&dec,ptr,DATA_SIZE);
+  for(ft=2;ft<1024;ft++){
+    for(i=0;i<ft;i++){
+      sym=ec_dec_uint(&dec,ft);
+      if(sym!=(unsigned)i){
+        fprintf(stderr,"Decoded %i instead of %i with ft of %i.\n",sym,i,ft);
+        ret=-1;
+      }
+    }
+  }
+  for(ftb=1;ftb<16;ftb++){
+    for(i=0;i<(1<<ftb);i++){
+      sym=ec_dec_bits(&dec,ftb);
+      if(sym!=(unsigned)i){
+        fprintf(stderr,"Decoded %i instead of %i with ftb of %i.\n",sym,i,ftb);
+        ret=-1;
+      }
+    }
+  }
+  nbits2=ec_tell_frac(&dec);
+  if(nbits!=nbits2){
+    fprintf(stderr,
+     "Reported number of bits used was %0.2lf, should be %0.2lf.\n",
+     ldexp(nbits2,-3),ldexp(nbits,-3));
+    ret=-1;
+  }
+  /*Testing an encoder bust prefers range coder data over raw bits.
+    This isn't a general guarantee, will only work for data that is buffered in
+     the encoder state and not yet stored in the user buffer, and should never
+     get used in practice.
+    It's mostly here for code coverage completeness.*/
+  /*Start with a 16-bit buffer.*/
+  ec_enc_init(&enc,ptr,2);
+  /*Write 7 raw bits.*/
+  ec_enc_bits(&enc,0x55,7);
+  /*Write 12.3 bits of range coder data.*/
+  ec_enc_uint(&enc,1,2);
+  ec_enc_uint(&enc,1,3);
+  ec_enc_uint(&enc,1,4);
+  ec_enc_uint(&enc,1,5);
+  ec_enc_uint(&enc,2,6);
+  ec_enc_uint(&enc,6,7);
+  ec_enc_done(&enc);
+  ec_dec_init(&dec,ptr,2);
+  if(!enc.error
+   /*The raw bits should have been overwritten by the range coder data.*/
+   ||ec_dec_bits(&dec,7)!=0x05
+   /*And all the range coder data should have been encoded correctly.*/
+   ||ec_dec_uint(&dec,2)!=1
+   ||ec_dec_uint(&dec,3)!=1
+   ||ec_dec_uint(&dec,4)!=1
+   ||ec_dec_uint(&dec,5)!=1
+   ||ec_dec_uint(&dec,6)!=2
+   ||ec_dec_uint(&dec,7)!=6){
+    fprintf(stderr,"Encoder bust overwrote range coder data with raw bits.\n");
+    ret=-1;
+  }
+  srand(seed);
+  fprintf(stderr,"Testing random streams... Random seed: %u (%.4X)\n", seed, rand() % 65536);
+  for(i=0;i<409600;i++){
+    unsigned *data;
+    unsigned *tell;
+    unsigned tell_bits;
+    int       j;
+    int zeros;
+    ft=rand()/((RAND_MAX>>(rand()%11U))+1U)+10;
+    sz=rand()/((RAND_MAX>>(rand()%9U))+1U);
+    data=(unsigned *)malloc(sz*sizeof(*data));
+    tell=(unsigned *)malloc((sz+1)*sizeof(*tell));
+    ec_enc_init(&enc,ptr,DATA_SIZE2);
+    zeros = rand()%13==0;
+    tell[0]=ec_tell_frac(&enc);
+    for(j=0;j<sz;j++){
+      if (zeros)
+        data[j]=0;
+      else
+        data[j]=rand()%ft;
+      ec_enc_uint(&enc,data[j],ft);
+      tell[j+1]=ec_tell_frac(&enc);
+    }
+    if (rand()%2==0)
+      while(ec_tell(&enc)%8 != 0)
+        ec_enc_uint(&enc, rand()%2, 2);
+    tell_bits = ec_tell(&enc);
+    ec_enc_done(&enc);
+    if(tell_bits!=(unsigned)ec_tell(&enc)){
+      fprintf(stderr,"ec_tell() changed after ec_enc_done(): %i instead of %i (Random seed: %u)\n",
+       ec_tell(&enc),tell_bits,seed);
+      ret=-1;
+    }
+    if ((tell_bits+7)/8 < ec_range_bytes(&enc))
+    {
+      fprintf (stderr, "ec_tell() lied, there's %i bytes instead of %d (Random seed: %u)\n",
+               ec_range_bytes(&enc), (tell_bits+7)/8,seed);
+      ret=-1;
+    }
+    ec_dec_init(&dec,ptr,DATA_SIZE2);
+    if(ec_tell_frac(&dec)!=tell[0]){
+      fprintf(stderr,
+       "Tell mismatch between encoder and decoder at symbol %i: %i instead of %i (Random seed: %u).\n",
+       0,ec_tell_frac(&dec),tell[0],seed);
+    }
+    for(j=0;j<sz;j++){
+      sym=ec_dec_uint(&dec,ft);
+      if(sym!=data[j]){
+        fprintf(stderr,
+         "Decoded %i instead of %i with ft of %i at position %i of %i (Random seed: %u).\n",
+         sym,data[j],ft,j,sz,seed);
+        ret=-1;
+      }
+      if(ec_tell_frac(&dec)!=tell[j+1]){
+        fprintf(stderr,
+         "Tell mismatch between encoder and decoder at symbol %i: %i instead of %i (Random seed: %u).\n",
+         j+1,ec_tell_frac(&dec),tell[j+1],seed);
+      }
+    }
+    free(tell);
+    free(data);
+  }
+  /*Test compatibility between multiple different encode/decode routines.*/
+  for(i=0;i<409600;i++){
+    unsigned *logp1;
+    unsigned *data;
+    unsigned *tell;
+    unsigned *enc_method;
+    int       j;
+    sz=rand()/((RAND_MAX>>(rand()%9U))+1U);
+    logp1=(unsigned *)malloc(sz*sizeof(*logp1));
+    data=(unsigned *)malloc(sz*sizeof(*data));
+    tell=(unsigned *)malloc((sz+1)*sizeof(*tell));
+    enc_method=(unsigned *)malloc(sz*sizeof(*enc_method));
+    ec_enc_init(&enc,ptr,DATA_SIZE2);
+    tell[0]=ec_tell_frac(&enc);
+    for(j=0;j<sz;j++){
+      data[j]=rand()/((RAND_MAX>>1)+1);
+      logp1[j]=(rand()%15)+1;
+      enc_method[j]=rand()/((RAND_MAX>>2)+1);
+      switch(enc_method[j]){
+        case 0:{
+          ec_encode(&enc,data[j]?(1<<logp1[j])-1:0,
+           (1<<logp1[j])-(data[j]?0:1),1<<logp1[j]);
+        }break;
+        case 1:{
+          ec_encode_bin(&enc,data[j]?(1<<logp1[j])-1:0,
+           (1<<logp1[j])-(data[j]?0:1),logp1[j]);
+        }break;
+        case 2:{
+          ec_enc_bit_logp(&enc,data[j],logp1[j]);
+        }break;
+        case 3:{
+          unsigned char icdf[2];
+          icdf[0]=1;
+          icdf[1]=0;
+          ec_enc_icdf(&enc,data[j],icdf,logp1[j]);
+        }break;
+      }
+      tell[j+1]=ec_tell_frac(&enc);
+    }
+    ec_enc_done(&enc);
+    if((ec_tell(&enc)+7U)/8U<ec_range_bytes(&enc)){
+      fprintf(stderr,"tell() lied, there's %i bytes instead of %d (Random seed: %u)\n",
+       ec_range_bytes(&enc),(ec_tell(&enc)+7)/8,seed);
+      ret=-1;
+    }
+    ec_dec_init(&dec,ptr,DATA_SIZE2);
+    if(ec_tell_frac(&dec)!=tell[0]){
+      fprintf(stderr,
+       "Tell mismatch between encoder and decoder at symbol %i: %i instead of %i (Random seed: %u).\n",
+       0,ec_tell_frac(&dec),tell[0],seed);
+    }
+    for(j=0;j<sz;j++){
+      int fs;
+      int dec_method;
+      dec_method=rand()/((RAND_MAX>>2)+1);
+      switch(dec_method){
+        case 0:{
+          fs=ec_decode(&dec,1<<logp1[j]);
+          sym=fs>=(1<<logp1[j])-1;
+          ec_dec_update(&dec,sym?(1<<logp1[j])-1:0,
+           (1<<logp1[j])-(sym?0:1),1<<logp1[j]);
+        }break;
+        case 1:{
+          fs=ec_decode_bin(&dec,logp1[j]);
+          sym=fs>=(1<<logp1[j])-1;
+          ec_dec_update(&dec,sym?(1<<logp1[j])-1:0,
+           (1<<logp1[j])-(sym?0:1),1<<logp1[j]);
+        }break;
+        case 2:{
+          sym=ec_dec_bit_logp(&dec,logp1[j]);
+        }break;
+        case 3:{
+          unsigned char icdf[2];
+          icdf[0]=1;
+          icdf[1]=0;
+          sym=ec_dec_icdf(&dec,icdf,logp1[j]);
+        }break;
+      }
+      if(sym!=data[j]){
+        fprintf(stderr,
+         "Decoded %i instead of %i with logp1 of %i at position %i of %i (Random seed: %u).\n",
+         sym,data[j],logp1[j],j,sz,seed);
+        fprintf(stderr,"Encoding method: %i, decoding method: %i\n",
+         enc_method[j],dec_method);
+        ret=-1;
+      }
+      if(ec_tell_frac(&dec)!=tell[j+1]){
+        fprintf(stderr,
+         "Tell mismatch between encoder and decoder at symbol %i: %i instead of %i (Random seed: %u).\n",
+         j+1,ec_tell_frac(&dec),tell[j+1],seed);
+      }
+    }
+    free(enc_method);
+    free(tell);
+    free(data);
+    free(logp1);
+  }
+  ec_enc_init(&enc,ptr,DATA_SIZE2);
+  ec_enc_bit_logp(&enc,0,1);
+  ec_enc_bit_logp(&enc,0,1);
+  ec_enc_bit_logp(&enc,0,1);
+  ec_enc_bit_logp(&enc,0,1);
+  ec_enc_bit_logp(&enc,0,2);
+  ec_enc_patch_initial_bits(&enc,3,2);
+  if(enc.error){
+    fprintf(stderr,"patch_initial_bits failed");
+    ret=-1;
+  }
+  ec_enc_patch_initial_bits(&enc,0,5);
+  if(!enc.error){
+    fprintf(stderr,"patch_initial_bits didn't fail when it should have");
+    ret=-1;
+  }
+  ec_enc_done(&enc);
+  if(ec_range_bytes(&enc)!=1||ptr[0]!=192){
+    fprintf(stderr,"Got %d when expecting 192 for patch_initial_bits",ptr[0]);
+    ret=-1;
+  }
+  ec_enc_init(&enc,ptr,DATA_SIZE2);
+  ec_enc_bit_logp(&enc,0,1);
+  ec_enc_bit_logp(&enc,0,1);
+  ec_enc_bit_logp(&enc,1,6);
+  ec_enc_bit_logp(&enc,0,2);
+  ec_enc_patch_initial_bits(&enc,0,2);
+  if(enc.error){
+    fprintf(stderr,"patch_initial_bits failed");
+    ret=-1;
+  }
+  ec_enc_done(&enc);
+  if(ec_range_bytes(&enc)!=2||ptr[0]!=63){
+    fprintf(stderr,"Got %d when expecting 63 for patch_initial_bits",ptr[0]);
+    ret=-1;
+  }
+  ec_enc_init(&enc,ptr,2);
+  ec_enc_bit_logp(&enc,0,2);
+  for(i=0;i<48;i++){
+    ec_enc_bits(&enc,0,1);
+  }
+  ec_enc_done(&enc);
+  if(!enc.error){
+    fprintf(stderr,"Raw bits overfill didn't fail when it should have");
+    ret=-1;
+  }
+  ec_enc_init(&enc,ptr,2);
+  for(i=0;i<17;i++){
+    ec_enc_bits(&enc,0,1);
+  }
+  ec_enc_done(&enc);
+  if(!enc.error){
+    fprintf(stderr,"17 raw bits encoded in two bytes");
+    ret=-1;
+  }
+  free(ptr);
+  return ret;
+}