mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-12-11 15:09:03 +08:00
106 lines
3.2 KiB
C++
106 lines
3.2 KiB
C++
///////////////////////////////////////////////////////////////////////
|
|
// File: dawg_cache.h
|
|
// Description: A class that knows about loading and caching dawgs.
|
|
// Author: David Eger
|
|
// Created: Fri Jan 27 12:08:00 PST 2012
|
|
//
|
|
// (C) Copyright 2012, Google Inc.
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
//
|
|
///////////////////////////////////////////////////////////////////////
|
|
|
|
#include "dawg_cache.h"
|
|
|
|
#include "dawg.h"
|
|
#include "object_cache.h"
|
|
#include "strngs.h"
|
|
#include "tessdatamanager.h"
|
|
|
|
namespace tesseract {
|
|
|
|
struct DawgLoader {
|
|
DawgLoader(const STRING &lang,
|
|
const char *data_file_name,
|
|
TessdataType tessdata_dawg_type,
|
|
int dawg_debug_level)
|
|
: lang_(lang),
|
|
data_file_name_(data_file_name),
|
|
tessdata_dawg_type_(tessdata_dawg_type),
|
|
dawg_debug_level_(dawg_debug_level) {}
|
|
|
|
Dawg *Load();
|
|
|
|
STRING lang_;
|
|
const char *data_file_name_;
|
|
TessdataType tessdata_dawg_type_;
|
|
int dawg_debug_level_;
|
|
};
|
|
|
|
Dawg *DawgCache::GetSquishedDawg(
|
|
const STRING &lang,
|
|
const char *data_file_name,
|
|
TessdataType tessdata_dawg_type,
|
|
int debug_level) {
|
|
STRING data_id = data_file_name;
|
|
data_id += kTessdataFileSuffixes[tessdata_dawg_type];
|
|
DawgLoader loader(lang, data_file_name, tessdata_dawg_type, debug_level);
|
|
return dawgs_.Get(data_id, NewTessCallback(&loader, &DawgLoader::Load));
|
|
}
|
|
|
|
Dawg *DawgLoader::Load() {
|
|
TessdataManager data_loader;
|
|
if (!data_loader.Init(data_file_name_, dawg_debug_level_)) {
|
|
return NULL;
|
|
}
|
|
if (!data_loader.SeekToStart(tessdata_dawg_type_)) {
|
|
data_loader.End(); /// Must close the file
|
|
return NULL;
|
|
}
|
|
FILE *fp = data_loader.GetDataFilePtr();
|
|
DawgType dawg_type;
|
|
PermuterType perm_type;
|
|
switch (tessdata_dawg_type_) {
|
|
case TESSDATA_PUNC_DAWG:
|
|
dawg_type = DAWG_TYPE_PUNCTUATION;
|
|
perm_type = PUNC_PERM;
|
|
break;
|
|
case TESSDATA_SYSTEM_DAWG:
|
|
dawg_type = DAWG_TYPE_WORD;
|
|
perm_type = SYSTEM_DAWG_PERM;
|
|
break;
|
|
case TESSDATA_NUMBER_DAWG:
|
|
dawg_type = DAWG_TYPE_NUMBER;
|
|
perm_type = NUMBER_PERM;
|
|
break;
|
|
case TESSDATA_BIGRAM_DAWG:
|
|
dawg_type = DAWG_TYPE_WORD; // doesn't actually matter
|
|
perm_type = COMPOUND_PERM; // doesn't actually matter
|
|
break;
|
|
case TESSDATA_UNAMBIG_DAWG:
|
|
dawg_type = DAWG_TYPE_WORD;
|
|
perm_type = SYSTEM_DAWG_PERM;
|
|
break;
|
|
case TESSDATA_FREQ_DAWG:
|
|
dawg_type = DAWG_TYPE_WORD;
|
|
perm_type = FREQ_DAWG_PERM;
|
|
break;
|
|
default:
|
|
data_loader.End();
|
|
return NULL;
|
|
}
|
|
SquishedDawg *retval =
|
|
new SquishedDawg(fp, dawg_type, lang_, perm_type, dawg_debug_level_);
|
|
data_loader.End();
|
|
return retval;
|
|
}
|
|
|
|
} // namespace tesseract
|