C++ (Cpp) arithmodel_decode_cbt Examples

Example #1

static void
decode(VMPM *vmpm)
{
  Arithcoder *ac;
  Arithmodel *am;
  Arithmodel *bin_am;
  unsigned int *index_to_symbol;
  int i, n;
  unsigned int j;

  //debug_message_fn("()\n");
  fatal("DECODING IS INVALID. NEED REIMPLEMENTATION.\n");

  ac = arithcoder_arith_create();
  arithcoder_decode_init(ac, vmpm->infile);

  am = arithmodel_order_zero_create();
  arithmodel_decode_init(am, ac);

  bin_am = arithmodel_order_zero_create();
  arithmodel_decode_init(bin_am, ac);

  i = fgetc(vmpm->outfile);
  vmpm->token_index[i] = vmpm->blocksize / ipow(vmpm->r, i);
  for (; i >= 1; i--) {
    unsigned int nsymbols = 0;

    stat_message(vmpm, "D:Level %d (%d tokens, %d distinct): ", i, vmpm->token_index[i], vmpm->newtoken[i] - 1);
    vmpm->token_index[i - 1] = 0;
    if ((vmpm->tokens[i] = calloc(vmpm->token_index[i], sizeof(Token))) == NULL)
      memory_error(NULL, MEMORY_ERROR);
    /* Decode escape symbols at once. */
    arithmodel_order_zero_reset(bin_am, 0, 0);
    arithmodel_install_symbol(bin_am, 1);
    arithmodel_install_symbol(bin_am, 1);
    for (j = 0; j < vmpm->token_index[i]; j++) {
      Index idx;

      arithmodel_decode(bin_am, &idx);
      if (idx) {
	nsymbols++;
	vmpm->token[i][j]->value = nsymbols;
      } else {
	vmpm->token[i][j]->value = 0;
      }
    }
    /* Then decode non-escape symbols. */
    arithmodel_order_zero_reset(bin_am, 0, 0);
    arithmodel_install_symbol(bin_am, 1);
    arithmodel_install_symbol(bin_am, 1);
    for (j = 0; j < vmpm->token_index[i]; j++) {
      if (vmpm->token[i][j]->value == 0) {
	Token_value tv;
	arithmodel_decode_cbt(bin_am, &tv, nsymbols - 1, 0, 1);
	vmpm->token[i][j]->value = tv + 1;
	stat_message(vmpm, "%d ", tv);
      } else {
	nsymbols++;
	stat_message(vmpm, "e ");
      }
    }
    stat_message(vmpm, "\n");
    vmpm->token_index[i - 1] = nsymbols * vmpm->r;
  }

  if ((index_to_symbol = calloc(vmpm->alphabetsize, sizeof(unsigned int))) == NULL)
    memory_error(NULL, MEMORY_ERROR);

  n = 0;
  arithmodel_order_zero_reset(am, 0, vmpm->alphabetsize - 1);
  stat_message(vmpm, "D:Level 0 (%d tokens): ", vmpm->token_index[0]);
  for (j = 0; j < vmpm->token_index[0]; j++) {
    Index v;

    if (arithmodel_decode(am, &v) == 2) {
      arithmodel_decode_bits(bin_am, &vmpm->tokens[0][j].value, vmpm->bits_per_symbol, 0, 1);
      index_to_symbol[n++] = vmpm->tokens[0][j].value;
      stat_message(vmpm, "e ");
    } else {
      vmpm->tokens[0][j].value = index_to_symbol[v];
      stat_message(vmpm, "%d ", v);
    }
  }
  stat_message(vmpm, "\n");
  free(index_to_symbol);

  arithcoder_decode_final(ac);

  arithmodel_destroy(am);
  arithcoder_destroy(ac);
}

Example #2

File: vmpm_decompose_normal.c Project: sina-ht/enfle

static void
decode(VMPM *vmpm)
{
  Arithcoder *ac;
  Arithmodel *am;
  Arithmodel *bin_am;
  unsigned int *index_to_symbol;
  int i, n;
  unsigned int j;

  //debug_message_fn("()\n");

  ac = arithcoder_arith_create();
  arithcoder_decode_init(ac, vmpm->infile);

  am = arithmodel_order_zero_create();
  arithmodel_decode_init(am, ac);

  bin_am = arithmodel_order_zero_create();
  arithmodel_decode_init(bin_am, ac);

  i = fgetc(vmpm->outfile);
  vmpm->token_index[i] = vmpm->blocksize / ipow(vmpm->r, i);
  for (; i >= 1; i--) {
    unsigned int tmp;

    arithmodel_order_zero_reset(bin_am, 0, 0);
    arithmodel_install_symbol(bin_am, 1);
    arithmodel_install_symbol(bin_am, 1);
    arithmodel_decode_cbt(bin_am, &tmp, vmpm->token_index[i], 0, 1);
    vmpm->newtoken[i] = tmp + 1;
    stat_message(vmpm, "D:Level %d (%d tokens, %d distinct): ", i, vmpm->token_index[i], vmpm->newtoken[i] - 1);
    vmpm->token_index[i - 1] = 0;
    if ((vmpm->tokens[i] = calloc(vmpm->token_index[i], sizeof(Token))) == NULL)
      memory_error(NULL, MEMORY_ERROR);
    arithmodel_order_zero_reset(am, 0, vmpm->newtoken[i]);
    vmpm->tokens[i][0].value = 1;
    for (j = 1; j < vmpm->token_index[i]; j++) {
      Index idx;

      arithmodel_decode(am, &idx);
      vmpm->tokens[i][j].value = idx + 1;
      if (vmpm->tokens[i][j].value > vmpm->token_index[i - 1]) {
	if (vmpm->tokens[i][j].value == vmpm->token_index[i - 1] + 1) {
	  stat_message(vmpm, "e ");
	  vmpm->token_index[i - 1]++;
	} else
	  generic_error((char *)"Invalid token value.\n", INVALID_TOKEN_VALUE_ERROR);
      } else {
	stat_message(vmpm, "%d ", idx);
      }
    }
    vmpm->token_index[i - 1] *= vmpm->r;
    stat_message(vmpm, "\n");
  }

  if ((index_to_symbol = calloc(vmpm->alphabetsize, sizeof(unsigned int))) == NULL)
    memory_error(NULL, MEMORY_ERROR);

  n = 0;
  arithmodel_order_zero_reset(am, 0, vmpm->alphabetsize - 1);
  arithmodel_order_zero_reset(bin_am, 0, 0);
  arithmodel_install_symbol(bin_am, 1);
  arithmodel_install_symbol(bin_am, 1);
  stat_message(vmpm, "D:Level 0 (%d tokens): ", vmpm->token_index[0]);
  for (j = 0; j < vmpm->token_index[0]; j++) {
    Index v;

    if (arithmodel_decode(am, &v) == 2) {
      stat_message(vmpm, "e ");
      arithmodel_decode_bits(bin_am, &vmpm->tokens[0][j].value, vmpm->bits_per_symbol, 0, 1);
      index_to_symbol[n++] = vmpm->tokens[0][j].value;
    } else {
      vmpm->tokens[0][j].value = index_to_symbol[v];
      stat_message(vmpm, "%d ", v);
    }
  }
  stat_message(vmpm, "\n");
  free(index_to_symbol);

  arithcoder_decode_final(ac);

  arithmodel_destroy(bin_am);
  arithmodel_destroy(am);
  arithcoder_destroy(ac);
}