rdjpgcom.c File Reference

#include "jinclude.h"
#include <ctype.h>

Go to the source code of this file.

Defines
#define	JPEG_CJPEG_DJPEG   /* to get the command-line config symbols */
#define	READ_BINARY   "rb"
#define	EXIT_FAILURE   1
#define	EXIT_SUCCESS   0
#define	NEXTBYTE()   getc(infile)
#define	ERREXIT(msg)   (fprintf(stderr, "%s\n", msg), exit(EXIT_FAILURE))
#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_APP0   0xE0 /* Application-specific marker, type N */
#define	M_APP12   0xEC /* (we don't bother to list all 16 APPn's) */
#define	M_COM   0xFE /* COMment */
Functions
static int	read_1_byte (void)
static unsigned int	read_2_bytes (void)
static int	next_marker (void)
static int	first_marker (void)
static void	skip_variable (void)
static void	process_COM (int raw)
static void	process_SOFn (int marker)
static int	scan_JPEG_header (int verbose, int raw)
static void	usage (void)
static int	keymatch (char *arg, const char *keyword, int minchars)
int	main (int argc, char **argv)
Variables
static FILE *	infile
static const char *	progname