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/*------------------------------------------------------------------------
* Copyright 2007-2010 (c) Jeff Brown <spadix@users.sourceforge.net>
*
* This file is part of the ZBar Bar Code Reader.
*
* The ZBar Bar Code Reader is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* The ZBar Bar Code Reader 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 Public License for more details.
*
* You should have received a copy of the GNU Lesser Public License
* along with the ZBar Bar Code Reader; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* http://sourceforge.net/projects/zbar
*------------------------------------------------------------------------*/
#ifndef _IMAGE_H_
#define _IMAGE_H_
#include "config.h"
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#endif
#include <assert.h>
#include <stdlib.h>
#include <zbar.h>
#include "error.h"
#include "refcnt.h"
#include "symbol.h"
#define fourcc zbar_fourcc
/* unpack size/location of component */
#define RGB_SIZE(c) ((c) >> 5)
#define RGB_OFFSET(c) ((c)&0x1f)
/* coarse image format categorization.
* to limit conversion variations
*/
typedef enum zbar_format_group_e
{
ZBAR_FMT_GRAY,
ZBAR_FMT_YUV_PLANAR,
ZBAR_FMT_YUV_PACKED,
ZBAR_FMT_RGB_PACKED,
ZBAR_FMT_YUV_NV,
ZBAR_FMT_JPEG,
/* enum size */
ZBAR_FMT_NUM
} zbar_format_group_t;
struct zbar_image_s {
uint32_t format; /* fourcc image format code */
unsigned width, height; /* image size */
const void *data; /* image sample data */
unsigned long datalen; /* allocated/mapped size of data */
unsigned crop_x, crop_y; /* crop rectangle */
unsigned crop_w, crop_h;
void *userdata; /* user specified data associated w/image */
/* cleanup handler */
zbar_image_cleanup_handler_t *cleanup;
refcnt_t refcnt; /* reference count */
zbar_video_t *src; /* originator */
int srcidx; /* index used by originator */
zbar_image_t *next; /* internal image lists */
unsigned seq; /* page/frame sequence number */
zbar_symbol_set_t *syms; /* decoded result set */
};
/* description of an image format */
typedef struct zbar_format_def_s {
uint32_t format; /* fourcc */
zbar_format_group_t group; /* coarse categorization */
union {
uint8_t gen[4]; /* raw bytes */
struct {
uint8_t bpp; /* bits per pixel */
uint8_t red, green, blue; /* size/location a la RGB_BITS() */
} rgb;
struct {
uint8_t xsub2, ysub2; /* chroma subsampling in each axis */
uint8_t packorder; /* channel ordering flags
* bit0: 0=UV, 1=VU
* bit1: 0=Y/chroma, 1=chroma/Y
*/
} yuv;
uint32_t cmp; /* quick compare equivalent formats */
} p;
} zbar_format_def_t;
extern int _zbar_best_format(uint32_t, uint32_t *, const uint32_t *);
extern const zbar_format_def_t *_zbar_format_lookup(uint32_t);
extern void _zbar_image_free(zbar_image_t *);
#ifdef DEBUG_SVG
extern int zbar_image_write_png(const zbar_image_t *, const char *);
#else
#define zbar_image_write_png(...)
#endif
static inline void _zbar_image_refcnt(zbar_image_t *img, int delta)
{
if (!_zbar_refcnt(&img->refcnt, delta) && delta <= 0) {
if (img->cleanup)
img->cleanup(img);
if (!img->src)
_zbar_image_free(img);
}
}
static inline void _zbar_image_swap_symbols(zbar_image_t *a, zbar_image_t *b)
{
zbar_symbol_set_t *tmp = a->syms;
a->syms = b->syms;
b->syms = tmp;
}
static inline void _zbar_image_copy_size(zbar_image_t *dst,
const zbar_image_t *src)
{
dst->width = src->width;
dst->height = src->height;
dst->crop_x = src->crop_x;
dst->crop_y = src->crop_y;
dst->crop_w = src->crop_w;
dst->crop_h = src->crop_h;
}
static inline zbar_image_t *_zbar_image_copy(const zbar_image_t *src,
int inverted)
{
zbar_image_t *dst;
if (inverted && (src->format != fourcc('Y', '8', '0', '0')) &&
(src->format != fourcc('G', 'R', 'E', 'Y')))
return NULL;
dst = zbar_image_create();
dst->format = src->format;
_zbar_image_copy_size(dst, src);
dst->datalen = src->datalen;
dst->data = malloc(src->datalen);
assert(dst->data);
if (!inverted) {
memcpy((void *)dst->data, src->data, src->datalen);
} else {
int i, len = src->datalen;
long *sp = (void *)src->data, *dp = (void *)dst->data;
char *spc, *dpc;
/* Do it word per word, in order to speedup */
for (i = 0; i < len; i += sizeof(long))
*dp++ = ~(*sp++);
/* Deal with non-aligned remains, if any */
len -= i;
spc = (char *)sp;
dpc = (char *)dp;
for (i = 0; i < len; i++)
*dpc++ = ~(*spc++);
}
dst->cleanup = zbar_image_free_data;
return (dst);
}
#endif
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