jpeg_resolution.cc File Reference

#include "common.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "tools.h"

Go to the source code of this file.

Defines
#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_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
#define	M_EOI   0xD9
#define	M_SOS   0xDA
#define	M_JFIF   0xE0
#define	M_EXIF   0xE1
#define	M_COM   0xFE
#define	M_DQT   0xDB
#define	M_DHT   0xC4
#define	M_DRI   0xDD
#define	ITEM_BUF_SIZE   16
Typedefs
typedef unsigned char	uchar
Functions
static int	Get16m (const void *Short)
static int	ioh_fgetc (Ref< IOHandler > ioh)
static void	get_jpeg_resolution (Ref< IOHandler > ioh, int *w, int *h)
String	get_jpeg_resolution (Ref< IOHandler > ioh)
	Extracts resolution from a JPEG image.

---

Detailed Description

Definition in file jpeg_resolution.cc.

---

Define Documentation

#define ITEM_BUF_SIZE   16

Definition at line 77 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().

#define M_COM   0xFE

Definition at line 69 of file jpeg_resolution.cc.

#define M_DHT   0xC4

Definition at line 71 of file jpeg_resolution.cc.

#define M_DQT   0xDB

Definition at line 70 of file jpeg_resolution.cc.

#define M_DRI   0xDD

Definition at line 72 of file jpeg_resolution.cc.

#define M_EOI   0xD9

Definition at line 65 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().

#define M_EXIF   0xE1

Definition at line 68 of file jpeg_resolution.cc.

#define M_JFIF   0xE0

Definition at line 67 of file jpeg_resolution.cc.

#define M_SOF0   0xC0

Definition at line 51 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().

#define M_SOF1   0xC1

Definition at line 52 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().

#define M_SOF10   0xCA

Definition at line 59 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().

#define M_SOF11   0xCB

Definition at line 60 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().

#define M_SOF13   0xCD

Definition at line 61 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().

#define M_SOF14   0xCE

Definition at line 62 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().

#define M_SOF15   0xCF

Definition at line 63 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().

#define M_SOF2   0xC2

Definition at line 53 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().

#define M_SOF3   0xC3

Definition at line 54 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().

#define M_SOF5   0xC5

Definition at line 55 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().

#define M_SOF6   0xC6

Definition at line 56 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().

#define M_SOF7   0xC7

Definition at line 57 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().

#define M_SOF9   0xC9

Definition at line 58 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().

#define M_SOI   0xD8

Definition at line 64 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().

#define M_SOS   0xDA

Definition at line 66 of file jpeg_resolution.cc.

---

Typedef Documentation

typedef unsigned char uchar

Definition at line 44 of file jpeg_resolution.cc.

---

Function Documentation

static int Get16m

(

const void *

Short

)

[static]

Definition at line 78 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().

String get_jpeg_resolution

(

Ref< IOHandler >

ioh

)

Extracts resolution from a JPEG image.

Definition at line 174 of file jpeg_resolution.cc.

References get_jpeg_resolution().

static void get_jpeg_resolution	(	Ref< IOHandler >	ioh,
		int *	w,
		int *	h
	)			[static]

Definition at line 92 of file jpeg_resolution.cc.

References _, _Exception, Get16m(), ioh_fgetc(), ITEM_BUF_SIZE, M_EOI, M_SOF0, M_SOF1, M_SOF10, M_SOF11, M_SOF13, M_SOF14, M_SOF15, M_SOF2, M_SOF3, M_SOF5, M_SOF6, M_SOF7, M_SOF9, and M_SOI.

Referenced by get_jpeg_resolution(), and set_jpeg_resolution_resource().

static int ioh_fgetc

(

Ref< IOHandler >

ioh

)

[static]

Definition at line 83 of file jpeg_resolution.cc.

Referenced by get_jpeg_resolution().