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//========================================================================
//
// DCTStream.h
//
// This file is licensed under the GPLv2 or later
//
// Copyright 2005 Jeff Muizelaar <[email protected]>
// Copyright 2005 Martin Kretzschmar <[email protected]>
// Copyright 2005-2007, 2009-2011, 2017, 2019, 2021 Albert Astals Cid <[email protected]>
// Copyright 2010 Carlos Garcia Campos <[email protected]>
// Copyright 2011 Daiki Ueno <[email protected]>
// Copyright 2013 Thomas Freitag <[email protected]>
// Copyright 2020 Lluís Batlle i Rossell <[email protected]>
//
//========================================================================
#ifndef DCTSTREAM_H
#define DCTSTREAM_H
#include "poppler-config.h"
#include <cstdio>
#include <cstdlib>
#include <cstddef>
#include <csetjmp>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <cstring>
#include <cctype>
#include "goo/gmem.h"
#include "goo/gfile.h"
#include "Error.h"
#include "Object.h"
#include "Decrypt.h"
#include "Stream.h"
extern "C" {
#include <jpeglib.h>
#include <jerror.h>
}
struct str_src_mgr
{
struct jpeg_source_mgr pub;
JOCTET buffer;
Stream *str;
int index;
};
struct str_error_mgr
{
struct jpeg_error_mgr pub;
jmp_buf setjmp_buffer;
int width;
int height;
};
class DCTStream : public FilterStream
{
public:
DCTStream(Stream *strA, int colorXformA, Dict *dict, int recursion);
~DCTStream() override;
StreamKind getKind() const override { return strDCT; }
void reset() override;
int getChar() override;
int lookChar() override;
GooString *getPSFilter(int psLevel, const char *indent) override;
bool isBinary(bool last = true) const override;
private:
void init();
bool hasGetChars() override { return true; }
bool readLine();
int getChars(int nChars, unsigned char *buffer) override;
int colorXform;
JSAMPLE *current;
JSAMPLE *limit;
struct jpeg_decompress_struct cinfo;
struct str_error_mgr err;
struct str_src_mgr src;
JSAMPARRAY row_buffer;
};
#endif
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