You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
86 lines
2.9 KiB
86 lines
2.9 KiB
14 years ago
|
#include "Filter.h"
|
||
|
|
#include "Object.h"
|
||
|
|
#include "Decoder.h"
|
||
|
|
#include "ASCIIHexDecode.h"
|
||
|
|
#include "ASCII85Decode.h"
|
||
|
|
#include "LZWDecode.h"
|
||
|
|
#include "FlateDecode.h"
|
||
|
|
#include "RunLengthDecode.h"
|
||
|
|
#include "CCITTFaxDecode.h"
|
||
|
|
#include "JBIG2Decode.h"
|
||
|
|
#include "DCTDecode.h"
|
||
|
|
|
||
|
|
using namespace merge_lib;
|
||
|
|
std::map<std::string, Decoder *> Filter::_allDecoders;
|
||
|
|
|
||
|
|
Filter::~Filter()
|
||
|
|
{
|
||
|
|
std::map<std::string, Decoder *>::iterator it = _allDecoders.begin();
|
||
|
|
for(; it != _allDecoders.end(); ++it)
|
||
|
|
{
|
||
|
|
delete (*it).second;
|
||
|
|
}
|
||
|
|
_allDecoders.clear();
|
||
|
|
}
|
||
|
|
|
||
|
|
//replace coded stream with decoded
|
||
|
|
void Filter::getDecodedStream(std::string & stream)
|
||
|
|
{
|
||
|
|
std::vector <Decoder * > decoders = _getDecoders();
|
||
|
|
_objectWithStream->getStream(stream);
|
||
|
|
for(size_t i = 0; i < decoders.size(); ++i)
|
||
|
|
{
|
||
|
|
decoders[i]->decode(stream);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//parse object's content and fill out vector with
|
||
|
|
//necessary decoders
|
||
|
|
std::vector <Decoder * > Filter::_getDecoders()
|
||
|
|
{
|
||
|
|
std::string streamHeader;
|
||
|
|
static std::string whitespacesAndDelimeters(" \t\f\v\n\r<<>>]/");
|
||
|
|
_objectWithStream->getHeader(streamHeader);
|
||
|
|
unsigned int filterPosition = streamHeader.find("/Filter");
|
||
|
|
std::vector <Decoder * > result;
|
||
|
|
unsigned int startOfDecoder = filterPosition + 1;
|
||
|
|
while(1)
|
||
|
|
{
|
||
|
|
startOfDecoder = streamHeader.find("/", startOfDecoder);
|
||
|
|
if(startOfDecoder == std::string::npos)
|
||
|
|
break;
|
||
|
|
else
|
||
|
|
++startOfDecoder;
|
||
|
|
unsigned int endOfDecoder = streamHeader.find_first_of(whitespacesAndDelimeters, startOfDecoder);
|
||
|
|
if(endOfDecoder == std::string::npos)
|
||
|
|
break;
|
||
|
|
std::map<std::string, Decoder *>::iterator foundDecoder =
|
||
|
|
_allDecoders.find(streamHeader.substr(startOfDecoder, endOfDecoder - startOfDecoder));
|
||
|
|
if(foundDecoder == _allDecoders.end())
|
||
|
|
break;
|
||
|
|
Decoder * decoder = foundDecoder->second;
|
||
|
|
decoder->initialize(_objectWithStream);
|
||
|
|
result.push_back(decoder);
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
void Filter::_createAllDecodersSet()
|
||
|
|
{
|
||
|
|
|
||
|
|
if(!_allDecoders.empty())
|
||
|
|
return;
|
||
|
|
_allDecoders.insert(std::pair<std::string, Decoder *> (std::string("ASCIIHexDecode"), new ASCIIHexDecode()));
|
||
|
|
_allDecoders.insert(std::pair<std::string, Decoder *> (std::string("ASCII85Decode"), new ASCII85Decode()));
|
||
|
|
_allDecoders.insert(std::pair<std::string, Decoder *> (std::string("LZWDecode"), new LZWDecode()));
|
||
|
|
_allDecoders.insert(std::pair<std::string, Decoder *> (std::string("FlateDecode"), new FlateDecode()));
|
||
|
|
_allDecoders.insert(std::pair<std::string, Decoder *> (std::string("RunLengthDecode"), new RunLengthDecode()));
|
||
|
|
_allDecoders.insert(std::pair<std::string, Decoder *> (std::string("CCITTFaxDecode"), new CCITTFaxDecode()));
|
||
|
|
_allDecoders.insert(std::pair<std::string, Decoder *> (std::string("JBIG2Decode"), new JBIG2Decode()));
|
||
|
|
_allDecoders.insert(std::pair<std::string, Decoder *> (std::string("DCTDecode"), new DCTDecode()));
|
||
|
|
}
|
||
|
|
|
||
|
|
|