jdexif.h

ESS3890+SL原代码（1*16内存）

/* Copyright 2002, ESS Technology, Inc. */
/* SCCSID @(#)jdexif.h	1.2 05/06/03 */

/* $Id: jdexif.h,v 1.1 2002/10/02 18:38:14 gwang Exp $ */

#ifndef _JDEXIF_H_
#define _JDEXIF_H_

#ifndef TRUE
#define TRUE	1
#define FALSE	0
#endif

/* #define MAX_COMMENT 2000 */

/* This structure is used to store jpeg file sections in memory. */
typedef struct {
    uchar *  Data;
    int      Type;
    unsigned Size;
} Section_t;

/* This structure stores Exif header image elements in a simple manner
 * Used to store camera data as extracted from the various ways that it can be
 * stored in an exif header
 */
typedef struct {
    /* Exif */
    char CameraMake	[32];
    char CameraModel	[40];
    char DateTime	[20];
    int  Orientation;
    int  OrientationThm;

#if 0
    /* time_t FileDateTime; */
    int   IsColor;
    int   Process;
    int   FlashUsed;
    float FocalLength;
    float ExposureTime;
    float ApertureFNumber;
    float Distance;
    float CCDWidth;
    float ExposureBias;
    int   Whitebalance;
    int   MeteringMode;
    int   ExposureProgram;
    int   ISOequivalent;
    int   CompressionLevel;
    /* char  Comments[MAX_COMMENT]; */
#endif

    /* Thumbnail */
    /* unsigned char * ThumbnailPointer; */	// Pointer at the thumbnail
    unsigned ThumbnailSize;		// Size of thumbnail.
    int ThumbnailOffset;		// Thm SOI offset from the beginning.

    /* Image */
    int Components;			// Components
    int Height, Width;			// Resolution: W x H
    int CompressionMode;		// Compression Mode SOFn
} ImageInfo_t;


#define EXIT_FAILURE  1
#define EXIT_SUCCESS  0

void reset_exif_imageInfo();
void process_EXIF (unsigned char * CharBuf, unsigned int length);
int ReadJpegSections (uchar* buf, int buf_size);

extern ImageInfo_t JpgImgInfo;

/****************************************************************
 * JPEG markers consist of one or more 0xFF bytes, followed by
 * a marker code byte (which is not an FF).
 * Here are the marker codes of interest
 * in this program.  (See jdmarker.c for a more complete list.)
 ****************************************************************/

#define M_SOF0  0xC0            // Start Of Frame N
#define M_SOF1  0xC1            // N indicates which compression process
#define M_SOF2  0xC2            // Only SOF0-SOF2 are now in common use
#define M_SOF3  0xC3
#define M_SOF5  0xC5            // NB: codes C4 and CC are NOT SOF markers
#define M_SOF6  0xC6
#define M_SOF7  0xC7
#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_SOI   0xD8            // Start Of Image (beginning of datastream)
#define M_EOI   0xD9            // End Of Image (end of datastream)
#define M_SOS   0xDA            // Start Of Scan (begins compressed data)
#define M_JFIF  0xE0            // Jfif marker
#define M_EXIF  0xE1            // Exif marker
#define M_COM   0xFE            // COMment 

#endif