tesseract::DocumentCache Class Reference

#include <imagedata.h>

Public Member Functions
	DocumentCache (inT64 max_memory)
	~DocumentCache ()
bool	LoadDocuments (const GenericVector< STRING > &filenames, const char *lang, FileReader reader)
bool	AddToCache (DocumentData *data)
DocumentData *	FindDocument (const STRING &document_name) const
const ImageData *	GetPageBySerial (int serial)
const PointerVector < DocumentData > &	documents () const
int	total_pages () const

Detailed Description

Definition at line 245 of file imagedata.h.

Constructor & Destructor Documentation

tesseract::DocumentCache::DocumentCache ( inT64  max_memory )

explicit

Definition at line 435 of file imagedata.cpp.

  : total_pages_(0), memory_used_(0), max_memory_(max_memory) {}

tesseract::DocumentCache::~DocumentCache

(

)

Definition at line 437 of file imagedata.cpp.

{}

Member Function Documentation

bool tesseract::DocumentCache::AddToCache

(

DocumentData *

data

)

Definition at line 461 of file imagedata.cpp.

                                                 {
  inT64 new_memory = data->memory_used();
  memory_used_ += new_memory;
  documents_.push_back(data);
  total_pages_ += data->NumPages();
  // Delete the first item in the array, and other pages of the same name
  // while memory is full.
  while (memory_used_ >= max_memory_ && max_memory_ > 0) {
    tprintf("Memory used=%lld vs max=%lld, discarding doc of size %lld\n",
            memory_used_ , max_memory_, documents_[0]->memory_used());
    memory_used_ -= documents_[0]->memory_used();
    total_pages_ -= documents_[0]->NumPages();
    documents_.remove(0);
  }
  return true;
}

const PointerVector<DocumentData>& tesseract::DocumentCache::documents ( ) const

inline

Definition at line 265 of file imagedata.h.

                                                       {
    return documents_;
  }

DocumentData * tesseract::DocumentCache::FindDocument

(

const STRING &

document_name

)

const

Definition at line 479 of file imagedata.cpp.

                                                                           {
  for (int i = 0; i < documents_.size(); ++i) {
    if (documents_[i]->document_name() == document_name)
      return documents_[i];
  }
  return NULL;
}

const ImageData * tesseract::DocumentCache::GetPageBySerial

(

int

serial

)

Definition at line 489 of file imagedata.cpp.

                                                          {
  int document_index = serial % documents_.size();
  return documents_[document_index]->GetPage(serial / documents_.size());
}

bool tesseract::DocumentCache::LoadDocuments	(	const GenericVector< STRING > &	filenames,
		const char *	lang,
		FileReader	reader
	)

Definition at line 441 of file imagedata.cpp.

                                                                       {
  inT64 fair_share_memory = max_memory_ / filenames.size();
  for (int arg = 0; arg < filenames.size(); ++arg) {
    STRING filename = filenames[arg];
    DocumentData* document = new DocumentData(filename);
    if (document->LoadDocument(filename.string(), lang, 0,
                               fair_share_memory, reader)) {
      AddToCache(document);
    } else {
      tprintf("Failed to load image %s!\n", filename.string());
      delete document;
    }
  }
  tprintf("Loaded %d pages, total %gMB\n",
          total_pages_, memory_used_ / 1048576.0);
  return total_pages_ > 0;
}

int tesseract::DocumentCache::total_pages ( ) const

inline

Definition at line 268 of file imagedata.h.

                          {
    return total_pages_;
  }

---

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

• ccstruct/imagedata.h
• ccstruct/imagedata.cpp