QRSequenceGenerator Class Reference

#include <qrsequence.h>

List of all members.

Public Member Functions
	QRSequenceGenerator (int N)
int	GetVal ()
Protected Member Functions
int	GetBinaryReversedInteger (int in_val) const
Protected Attributes
int	N_
int	next_num_
int	num_bits_

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Detailed Description

Definition at line 32 of file qrsequence.h.

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Constructor & Destructor Documentation

QRSequenceGenerator::QRSequenceGenerator

(

int

N

)

[inline, explicit]

Definition at line 35 of file qrsequence.h.

                                      : N_(N), next_num_(0) {
    num_bits_ = static_cast<int>(ceil(log(static_cast<double>(N)) / log(2.0)));
  }

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Member Function Documentation

int QRSequenceGenerator::GetBinaryReversedInteger

(

int

in_val

)

const [inline, protected]

Definition at line 58 of file qrsequence.h.

                                                 {
    int bit_pos = num_bits_;
    int out_val = 0;
    while(bit_pos--) {
      // Set the value of the last bit.
      out_val |= (in_val & 0x1);
      if (bit_pos > 0) {
        // Left-shift output value to prepare for storing the next bit.
        out_val <<= 1;
      }
      // Right-shift input value to prepare for retrieving the next bit.
      in_val >>= 1;
    }
    return out_val;
  }

int QRSequenceGenerator::GetVal

(

)

[inline]

Definition at line 41 of file qrsequence.h.

               {
    const int kInvalidVal = -1;
    const int kMaxNaturalNumberValue = 1 << num_bits_;
    if (next_num_ >= kMaxNaturalNumberValue)
      return kInvalidVal;
    int n = next_num_;

    while (next_num_ < kMaxNaturalNumberValue) {
      n = GetBinaryReversedInteger(next_num_++);
      if (n < N_) break;
    }
    return (next_num_ > kMaxNaturalNumberValue) ? kInvalidVal : n;
  }

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Member Data Documentation

int QRSequenceGenerator::N_ [protected]

Definition at line 73 of file qrsequence.h.

int QRSequenceGenerator::next_num_ [protected]

Definition at line 75 of file qrsequence.h.

int QRSequenceGenerator::num_bits_ [protected]

Definition at line 77 of file qrsequence.h.

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The documentation for this class was generated from the following file:

• tesseract-ocr/ccutil/qrsequence.h