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//========================================================================
//
// JPEG2000Stream.h
//
// A JPX stream decoder using OpenJPEG
//
// Copyright 2008, 2010 Albert Astals Cid <aacid@kde.org>
// Copyright 2011 Daniel Glöckner <daniel-gl@gmx.net>
// Copyright 2013 Adrian Johnson <ajohnson@redneon.com>
//
// Licensed under GPLv2 or later
//
//========================================================================
#ifndef JPEG2000STREAM_H
#define JPEG2000STREAM_H
#include <openjpeg.h>
#include "goo/gtypes.h"
#include "Object.h"
#include "Stream.h"
class JPXStream: public FilterStream {
public:
JPXStream(Stream *strA);
virtual ~JPXStream();
virtual StreamKind getKind() { return strJPX; }
virtual void reset();
virtual void close();
virtual Goffset getPos();
virtual int getChar();
virtual int lookChar();
virtual GooString *getPSFilter(int psLevel, const char *indent);
virtual GBool isBinary(GBool last = gTrue);
virtual void getImageParams(int *bitsPerComponent, StreamColorSpaceMode *csMode);
private:
void init();
void init2(unsigned char *buf, int bufLen, OPJ_CODEC_FORMAT format);
virtual GBool hasGetChars() { return true; }
virtual int getChars(int nChars, Guchar *buffer);
inline int doGetChar() {
int result = doLookChar();
if (++ccounter == ncomps) {
ccounter = 0;
++counter;
}
return result;
}
inline int doLookChar() {
if (unlikely(inited == gFalse)) init();
if (unlikely(counter >= npixels)) return EOF;
return ((unsigned char *)image->comps[ccounter].data)[counter];
}
opj_image_t *image;
opj_dinfo_t *dinfo;
int counter;
int ccounter;
int npixels;
int ncomps;
GBool inited;
};
#endif
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