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/*
* Copyright 2001 Niels Provos <provos@citi.umich.edu>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Niels Provos.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 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.
*/
#ifndef _COMMON_
#define _COMMON_
struct image {
int x, y, depth, max;
u_char *img;
};
void jpg_finish(void);
void jpg_destroy(void);
int jpg_open(char *);
void jpg_version(int *, int *, u_int16_t *);
int jpg_toimage(char *, struct image *);
int prepare_all(short **, int *);
int prepare_all_gradx(short **, int *);
int prepare_normal(short **, int *);
int prepare_jphide(short **, int *);
int prepare_jsteg(short **, int *);
int jsteg_size(short *, int, int *);
int prepare_outguess(short **, int *);
char *fgetl(char *, int, FILE *);
int file_hasextension(char *, char *);
int is_random(u_char *, int);
#define TEST_BIT(x,y) ((x)[(y) / 32] & (1 << ((y) & 31)))
#define WRITE_BIT(x,y,what) ((x)[(y) / 32] = ((x)[(y) / 32] & \
~(1 << ((y) & 31))) | ((what) << ((y) & 31)))
extern int hib[], wib[];
enum order { ORDER_MCU, ORDER_NATURAL };
void stego_set_callback(void (*)(int, short), enum order);
void stego_set_eoi_callback(void (*cb)(void *));
#endif /* _COMMON_ */
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