+++ /dev/null
-/*M///////////////////////////////////////////////////////////////////////////////////////
-//
-// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
-//
-// By downloading, copying, installing or using the software you agree to this license.
-// If you do not agree to this license, do not download, install,
-// copy or use the software.
-//
-//
-// Intel License Agreement
-// For Open Source Computer Vision Library
-//
-// Copyright (C) 2000, Intel Corporation, all rights reserved.
-// Third party copyrights are property of their respective owners.
-//
-// Redistribution and use in source and binary forms, with or without modification,
-// are permitted provided that the following conditions are met:
-//
-// * Redistribution's of source code must retain the above copyright notice,
-// this list of conditions and the following disclaimer.
-//
-// * Redistribution's in binary form must reproduce the above copyright notice,
-// this list of conditions and the following disclaimer in the documentation
-// and/or other materials provided with the distribution.
-//
-// * The name of Intel Corporation may not be used to endorse or promote products
-// derived from this software without specific prior written permission.
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-// This software is provided by the copyright holders and contributors "as is" and
-// any express or implied warranties, including, but not limited to, the implied
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-// In no event shall the Intel Corporation or contributors be liable for any direct,
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-// loss of use, data, or profits; or business interruption) however caused
-// and on any theory of liability, whether in contract, strict liability,
-// or tort (including negligence or otherwise) arising in any way out of
-// the use of this software, even if advised of the possibility of such damage.
-//
-//M*/
-
-#ifndef _GRFMT_JPEG_H_
-#define _GRFMT_JPEG_H_
-
-#include "grfmt_base.h"
-#include "bitstrm.h"
-
-#ifdef HAVE_JPEG
-
-/* IJG-based version */
-
-class GrFmtJpegReader : public GrFmtReader
-{
-public:
-
- GrFmtJpegReader( const char* filename );
- ~GrFmtJpegReader();
-
- bool ReadData( uchar* data, int step, int color );
- bool ReadHeader();
- void Close();
-
-protected:
-
- void* m_cinfo; // pointer to IJG JPEG codec structure
- void* m_jerr; // pointer to error processing manager state
- FILE* m_f;
-};
-
-
-class GrFmtJpegWriter : public GrFmtWriter
-{
-public:
-
- GrFmtJpegWriter( const char* filename );
- ~GrFmtJpegWriter();
-
- bool WriteImage( const uchar* data, int step,
- int width, int height, int depth, int channels );
-};
-
-#else
-
-/* hand-crafted implementation */
-
-class RJpegBitStream : public RMBitStream
-{
-public:
- RMByteStream m_low_strm;
-
- RJpegBitStream();
- ~RJpegBitStream();
-
- virtual bool Open( const char* filename );
- virtual void Close();
-
- void Flush(); // flushes high-level bit stream
- void AlignOnByte();
- int FindMarker();
-
-protected:
- virtual void ReadBlock();
-};
-
-
-//////////////////// JPEG reader /////////////////////
-
-class GrFmtJpegReader : public GrFmtReader
-{
-public:
-
- GrFmtJpegReader( const char* filename );
- ~GrFmtJpegReader();
-
- bool ReadData( uchar* data, int step, int color );
- bool ReadHeader();
- void Close();
-
-protected:
-
- int m_offset; // offset of first scan
- int m_version; // JFIF version
- int m_planes; // 3 (YCrCb) or 1 (Gray)
- int m_precision; // 8 or 12-bit per sample
- int m_type; // SOF type
- int m_MCUs; // MCUs in restart interval
- int m_ss, m_se, m_ah, m_al; // progressive JPEG parameters
-
- // information about each component
- struct cmp_info
- {
- char h; // horizontal sampling factor
- char v; // vertical sampling factor
- char tq; // quantization table index
- char td, ta; // DC & AC huffman tables
- int dc_pred; // DC predictor
- };
-
- cmp_info m_ci[3];
-
- int m_tq[4][64];
- bool m_is_tq[4];
-
- short* m_td[4];
- bool m_is_td[4];
-
- short* m_ta[4];
- bool m_is_ta[4];
-
- RJpegBitStream m_strm;
-
-protected:
-
- bool LoadQuantTables( int length );
- bool LoadHuffmanTables( int length );
- void ProcessScan( int* idx, int ns, uchar* data, int step, int color );
- void ResetDecoder();
- void GetBlock( int* block, int c );
-};
-
-
-//////////////////// JPEG-specific output bitstream ///////////////////////
-
-class WJpegBitStream : public WMBitStream
-{
-public:
- WMByteStream m_low_strm;
-
- WJpegBitStream();
- ~WJpegBitStream();
-
- virtual void Flush();
- virtual bool Open( const char* filename );
- virtual void Close();
-
-protected:
- virtual void WriteBlock();
-};
-
-
-//////////////////// JPEG reader /////////////////////
-
-class GrFmtJpegWriter : public GrFmtWriter
-{
-public:
-
- GrFmtJpegWriter( const char* filename );
- ~GrFmtJpegWriter();
-
- bool WriteImage( const uchar* data, int step,
- int width, int height, int depth, int channels );
-
-protected:
-
- WJpegBitStream m_strm;
-};
-
-#endif /* HAVE_JPEG */
-
-
-// JPEG filter factory
-class GrFmtJpeg : public GrFmtFilterFactory
-{
-public:
-
- GrFmtJpeg();
- ~GrFmtJpeg();
-
- GrFmtReader* NewReader( const char* filename );
- GrFmtWriter* NewWriter( const char* filename );
-};
-
-
-#endif/*_GRFMT_JPEG_H_*/
projects / opencv / blobdiff