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///=============================================================================
//
// file : jpeg_const.h
//
// description : Simple jpeg coding/decoding library
// Various constants and internal type definitions
//
// project : TANGO
//
// author(s) : JL Pons
//
// Copyright (C) : 2004,2005,2006,2007,2008,2009,2010,2011,2012,2013
// European Synchrotron Radiation Facility
// BP 220, Grenoble 38043
// FRANCE
//
// This file is part of Tango.
//
// Tango is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Tango is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with Tango. If not, see <http://www.gnu.org/licenses/>.
//
// $Revision: 22213 $
//
// $Log$
// Revision 1.2 2009/04/20 14:55:58 jlpons
// Added GPL header, changed memory allocation to C++ fashion.
//
//=============================================================================
#ifndef _JPEGCONSTH_
#define _JPEGCONSTH_
// Huffman table structure
typedef struct {
unsigned char *huffBits; // Number of Huffman codes per bit size
unsigned char *huffVal; // Huffman codes per bit size
unsigned char huffSize[256]; // Huffman codes size
unsigned int huffCode[256]; // Huffman codes
unsigned int lookUp[256]; // look up table (decoding purpose)
unsigned int tree[512]; // Huffman tree (decoding purpose)
int inited; // Initialisation flag (decoding purpose)
} HUFFMANTABLE;
// Components structure
typedef struct {
int id; // Identifier
int horzSampling; // Horizontal sampling factor
int vertSampling; // Vertical sampling factor
int quantIdx; // Quantization table index
int dcIdx; // Huffman table DC index
int acIdx; // Huffman table AC index
short lastDc; // Last DC value
} JPGCOMPONENT;
// Decoder structure
typedef struct {
int width; // Image width
int height; // Image height
int scanType; // Type of scan
int outFormat; // Output format
int compNb; // Number of component (frame)
int compInScan; // Number of component (scan)
int mcuWidth; // MCU width
int mcuHeight; // MCU height
int mcuNbBlock; // Number of block per MCU (total)
int mcuNbRow; // Number of MCU per row
int mcuNbCol; // Number of MCU per col
int restartInterval; // Restart interval
int restartsLeft; // Number of MCU between DRI marker
int nextRestart; // Next RST marker code
int compList[6]; // List of component (scan)
HUFFMANTABLE hTables[8]; // Huffman tables
short *qTables[4]; // Quantization tables
JPGCOMPONENT comps[4]; // Components
short *blocks; // Blocks
unsigned char *yccFrame; // Decoded frame (RGB24 or GRAY8)
unsigned char *rgbFrame; // Decoded frame (RGB24 or GRAY8)
} JPGDECODER;
// JPEG scan type
#define JPG_SCAN_GRAYSCALE 0
#define JPG_SCAN_YH1V1 1
#define JPG_SCAN_YH2V1 2
#define JPG_SCAN_YH1V2 3
#define JPG_SCAN_YH2V2 4
// JPEG marker codes
#define M_SOF0 0xc0
#define M_SOF1 0xc1
#define M_SOF2 0xc2
#define M_SOF3 0xc3
#define M_SOF5 0xc5
#define M_SOF6 0xc6
#define M_SOF7 0xc7
#define M_JPG 0xc8
#define M_SOF9 0xc9
#define M_SOF10 0xca
#define M_SOF11 0xcb
#define M_SOF13 0xcd
#define M_SOF14 0xce
#define M_SOF15 0xcf
#define M_DHT 0xc4
#define M_DAC 0xcc
#define M_RST0 0xd0
#define M_RST1 0xd1
#define M_RST2 0xd2
#define M_RST3 0xd3
#define M_RST4 0xd4
#define M_RST5 0xd5
#define M_RST6 0xd6
#define M_RST7 0xd7
#define M_SOI 0xd8
#define M_EOI 0xd9
#define M_SOS 0xda
#define M_DQT 0xdb
#define M_DNL 0xdc
#define M_DRI 0xdd
#define M_DHP 0xde
#define M_EXP 0xdf
#define M_APP0 0xe0
#define M_APP1 0xe1
#define M_APP2 0xe2
#define M_APP3 0xe3
#define M_APP4 0xe4
#define M_APP5 0xe5
#define M_APP6 0xe6
#define M_APP7 0xe7
#define M_APP8 0xe8
#define M_APP9 0xe9
#define M_APP10 0xea
#define M_APP11 0xeb
#define M_APP12 0xec
#define M_APP13 0xed
#define M_APP14 0xee
#define M_APP15 0xef
#define M_JPG0 0xf0
#define M_JPG13 0xfd
#define M_COM 0xfe
#define M_TEM 0x01
#endif /* _JPEGCONSTH_ */
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