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convert.c
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/*------------------------------------------------------------------------
* Copyright 2007-2010 (c) Jeff Brown <[email protected]>
*
* 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
*------------------------------------------------------------------------*/
#include "image.h"
#include "video.h"
#include "window.h"
/* pack bit size and location offset of a component into one byte
*/
#define RGB_BITS(off, size) ((((8 - (size)) & 0x7) << 5) | ((off) & 0x1f))
typedef void (conversion_handler_t)(zbar_image_t*,
const zbar_format_def_t*,
const zbar_image_t*,
const zbar_format_def_t*);
typedef struct conversion_def_s {
int cost; /* conversion "badness" */
conversion_handler_t *func; /* function that accomplishes it */
} conversion_def_t;
/* NULL terminated list of known formats, in order of preference
* (NB Cr=V Cb=U)
*/
const uint32_t _zbar_formats[] = {
/* planar YUV formats */
fourcc('4','2','2','P'), /* FIXME also YV16? */
fourcc('I','4','2','0'),
fourcc('Y','U','1','2'), /* FIXME also IYUV? */
fourcc('Y','V','1','2'),
fourcc('4','1','1','P'),
/* planar Y + packed UV plane */
fourcc('N','V','1','2'),
fourcc('N','V','2','1'),
/* packed YUV formats */
fourcc('Y','U','Y','V'),
fourcc('U','Y','V','Y'),
fourcc('Y','U','Y','2'), /* FIXME add YVYU */
fourcc('Y','U','V','4'), /* FIXME where is this from? */
/* packed rgb formats */
fourcc('R','G','B','3'),
fourcc( 3 , 0 , 0 , 0 ),
fourcc('B','G','R','3'),
fourcc('R','G','B','4'),
fourcc('B','G','R','4'),
fourcc('R','G','B','P'),
fourcc('R','G','B','O'),
fourcc('R','G','B','R'),
fourcc('R','G','B','Q'),
fourcc('Y','U','V','9'),
fourcc('Y','V','U','9'),
/* basic grayscale format */
fourcc('G','R','E','Y'),
fourcc('Y','8','0','0'),
fourcc('Y','8',' ',' '),
fourcc('Y','8', 0 , 0 ),
/* low quality RGB formats */
fourcc('R','G','B','1'),
fourcc('R','4','4','4'),
fourcc('B','A','8','1'),
/* unsupported packed YUV formats */
fourcc('Y','4','1','P'),
fourcc('Y','4','4','4'),
fourcc('Y','U','V','O'),
fourcc('H','M','1','2'),
/* unsupported packed RGB format */
fourcc('H','I','2','4'),
/* unsupported compressed formats */
fourcc('J','P','E','G'),
fourcc('M','J','P','G'),
fourcc('M','P','E','G'),
/* terminator */
0
};
const int _zbar_num_formats = sizeof(_zbar_formats) / sizeof(uint32_t);
/* format definitions */
static const zbar_format_def_t format_defs[] = {
{ fourcc('R','G','B','4'), ZBAR_FMT_RGB_PACKED,
{ { 4, RGB_BITS(8, 8), RGB_BITS(16, 8), RGB_BITS(24, 8) } } },
{ fourcc('B','G','R','1'), ZBAR_FMT_RGB_PACKED,
{ { 1, RGB_BITS(0, 3), RGB_BITS(3, 3), RGB_BITS(6, 2) } } },
{ fourcc('4','2','2','P'), ZBAR_FMT_YUV_PLANAR, { { 1, 0, 0 /*UV*/ } } },
{ fourcc('Y','8','0','0'), ZBAR_FMT_GRAY, },
{ fourcc('Y','U','Y','2'), ZBAR_FMT_YUV_PACKED,
{ { 1, 0, 0, /*YUYV*/ } } },
{ fourcc('J','P','E','G'), ZBAR_FMT_JPEG, },
{ fourcc('Y','V','Y','U'), ZBAR_FMT_YUV_PACKED,
{ { 1, 0, 1, /*YVYU*/ } } },
{ fourcc('Y','8', 0 , 0 ), ZBAR_FMT_GRAY, },
{ fourcc('N','V','2','1'), ZBAR_FMT_YUV_NV, { { 1, 1, 1 /*VU*/ } } },
{ fourcc('N','V','1','2'), ZBAR_FMT_YUV_NV, { { 1, 1, 0 /*UV*/ } } },
{ fourcc('B','G','R','3'), ZBAR_FMT_RGB_PACKED,
{ { 3, RGB_BITS(16, 8), RGB_BITS(8, 8), RGB_BITS(0, 8) } } },
{ fourcc('Y','V','U','9'), ZBAR_FMT_YUV_PLANAR, { { 2, 2, 1 /*VU*/ } } },
{ fourcc('R','G','B','O'), ZBAR_FMT_RGB_PACKED,
{ { 2, RGB_BITS(10, 5), RGB_BITS(5, 5), RGB_BITS(0, 5) } } },
{ fourcc('R','G','B','Q'), ZBAR_FMT_RGB_PACKED,
{ { 2, RGB_BITS(2, 5), RGB_BITS(13, 5), RGB_BITS(8, 5) } } },
{ fourcc('G','R','E','Y'), ZBAR_FMT_GRAY, },
{ fourcc( 3 , 0 , 0 , 0 ), ZBAR_FMT_RGB_PACKED,
{ { 4, RGB_BITS(16, 8), RGB_BITS(8, 8), RGB_BITS(0, 8) } } },
{ fourcc('Y','8',' ',' '), ZBAR_FMT_GRAY, },
{ fourcc('I','4','2','0'), ZBAR_FMT_YUV_PLANAR, { { 1, 1, 0 /*UV*/ } } },
{ fourcc('R','G','B','1'), ZBAR_FMT_RGB_PACKED,
{ { 1, RGB_BITS(5, 3), RGB_BITS(2, 3), RGB_BITS(0, 2) } } },
{ fourcc('Y','U','1','2'), ZBAR_FMT_YUV_PLANAR, { { 1, 1, 0 /*UV*/ } } },
{ fourcc('Y','V','1','2'), ZBAR_FMT_YUV_PLANAR, { { 1, 1, 1 /*VU*/ } } },
{ fourcc('R','G','B','3'), ZBAR_FMT_RGB_PACKED,
{ { 3, RGB_BITS(0, 8), RGB_BITS(8, 8), RGB_BITS(16, 8) } } },
{ fourcc('R','4','4','4'), ZBAR_FMT_RGB_PACKED,
{ { 2, RGB_BITS(8, 4), RGB_BITS(4, 4), RGB_BITS(0, 4) } } },
{ fourcc('B','G','R','4'), ZBAR_FMT_RGB_PACKED,
{ { 4, RGB_BITS(16, 8), RGB_BITS(8, 8), RGB_BITS(0, 8) } } },
{ fourcc('Y','U','V','9'), ZBAR_FMT_YUV_PLANAR, { { 2, 2, 0 /*UV*/ } } },
{ fourcc('M','J','P','G'), ZBAR_FMT_JPEG, },
{ fourcc('4','1','1','P'), ZBAR_FMT_YUV_PLANAR, { { 2, 0, 0 /*UV*/ } } },
{ fourcc('R','G','B','P'), ZBAR_FMT_RGB_PACKED,
{ { 2, RGB_BITS(11, 5), RGB_BITS(5, 6), RGB_BITS(0, 5) } } },
{ fourcc('R','G','B','R'), ZBAR_FMT_RGB_PACKED,
{ { 2, RGB_BITS(3, 5), RGB_BITS(13, 6), RGB_BITS(8, 5) } } },
{ fourcc('Y','U','Y','V'), ZBAR_FMT_YUV_PACKED,
{ { 1, 0, 0, /*YUYV*/ } } },
{ fourcc('U','Y','V','Y'), ZBAR_FMT_YUV_PACKED,
{ { 1, 0, 2, /*UYVY*/ } } },
};
static const int num_format_defs =
sizeof(format_defs) / sizeof(zbar_format_def_t);
#ifdef DEBUG_CONVERT
static int intsort (const void *a,
const void *b)
{
return(*(uint32_t*)a - *(uint32_t*)b);
}
#endif
/* verify that format list is in required sort order */
static inline int verify_format_sort (void)
{
int i;
for(i = 0; i < num_format_defs; i++) {
int j = i * 2 + 1;
if((j < num_format_defs &&
format_defs[i].format < format_defs[j].format) ||
(j + 1 < num_format_defs &&
format_defs[j + 1].format < format_defs[i].format))
break;
}
if(i == num_format_defs)
return(0);
/* spew correct order for fix */
fprintf(stderr, "ERROR: image format list is not sorted!?\n");
#ifdef DEBUG_CONVERT
assert(num_format_defs);
uint32_t sorted[num_format_defs];
uint32_t ordered[num_format_defs];
for(i = 0; i < num_format_defs; i++)
sorted[i] = format_defs[i].format;
qsort(sorted, num_format_defs, sizeof(uint32_t), intsort);
for(i = 0; i < num_format_defs; i = i << 1 | 1);
i = (i - 1) / 2;
ordered[i] = sorted[0];
int j, k;
for(j = 1; j < num_format_defs; j++) {
k = i * 2 + 2;
if(k < num_format_defs) {
i = k;
for(k = k * 2 + 1; k < num_format_defs; k = k * 2 + 1)
i = k;
}
else {
for(k = (i - 1) / 2; i != k * 2 + 1; k = (i - 1) / 2) {
assert(i);
i = k;
}
i = k;
}
ordered[i] = sorted[j];
}
fprintf(stderr, "correct sort order is:");
for(i = 0; i < num_format_defs; i++)
fprintf(stderr, " %4.4s", (char*)&ordered[i]);
fprintf(stderr, "\n");
#endif
return(-1);
}
static inline void uv_round (zbar_image_t *img,
const zbar_format_def_t *fmt)
{
img->width >>= fmt->p.yuv.xsub2;
img->width <<= fmt->p.yuv.xsub2;
img->height >>= fmt->p.yuv.ysub2;
img->height <<= fmt->p.yuv.ysub2;
}
static inline void uv_roundup (zbar_image_t *img,
const zbar_format_def_t *fmt)
{
unsigned xmask, ymask;
if(fmt->group == ZBAR_FMT_GRAY)
return;
xmask = (1 << fmt->p.yuv.xsub2) - 1;
if(img->width & xmask)
img->width = (img->width + xmask) & ~xmask;
ymask = (1 << fmt->p.yuv.ysub2) - 1;
if(img->height & ymask)
img->height = (img->height + ymask) & ~ymask;
}
static inline unsigned long uvp_size (const zbar_image_t *img,
const zbar_format_def_t *fmt)
{
if(fmt->group == ZBAR_FMT_GRAY)
return(0);
return((img->width >> fmt->p.yuv.xsub2) *
(img->height >> fmt->p.yuv.ysub2));
}
static inline uint32_t convert_read_rgb (const uint8_t *srcp,
int bpp)
{
uint32_t p;
if(bpp == 3) {
p = *srcp;
p |= *(srcp + 1) << 8;
p |= *(srcp + 2) << 16;
}
else if(bpp == 4)
p = *((uint32_t*)(srcp));
else if(bpp == 2)
p = *((uint16_t*)(srcp));
else
p = *srcp;
return(p);
}
static inline void convert_write_rgb (uint8_t *dstp,
uint32_t p,
int bpp)
{
if(bpp == 3) {
*dstp = p & 0xff;
*(dstp + 1) = (p >> 8) & 0xff;
*(dstp + 2) = (p >> 16) & 0xff;
}
else if(bpp == 4)
*((uint32_t*)dstp) = p;
else if(bpp == 2)
*((uint16_t*)dstp) = p;
else
*dstp = p;
}
/* cleanup linked image by unrefing */
static void cleanup_ref (zbar_image_t *img)
{
if(img->next)
_zbar_image_refcnt(img->next, -1);
}
/* resize y plane, drop extra columns/rows from the right/bottom,
* or duplicate last column/row to pad missing data
*/
static inline void convert_y_resize (zbar_image_t *dst,
const zbar_format_def_t *dstfmt,
const zbar_image_t *src,
const zbar_format_def_t *srcfmt,
size_t n)
{
uint8_t *psrc, *pdst;
unsigned width, height, xpad, y;
if(dst->width == src->width && dst->height == src->height) {
memcpy((void*)dst->data, src->data, n);
return;
}
psrc = (void*)src->data;
pdst = (void*)dst->data;
width = (dst->width > src->width) ? src->width : dst->width;
xpad = (dst->width > src->width) ? dst->width - src->width : 0;
height = (dst->height > src->height) ? src->height : dst->height;
for(y = 0; y < height; y++) {
memcpy(pdst, psrc, width);
pdst += width;
psrc += src->width;
if(xpad) {
memset(pdst, *(psrc - 1), xpad);
pdst += xpad;
}
}
psrc -= src->width;
for(; y < dst->height; y++) {
memcpy(pdst, psrc, width);
pdst += width;
if(xpad) {
memset(pdst, *(psrc - 1), xpad);
pdst += xpad;
}
}
}
/* make new image w/reference to the same image data */
static void convert_copy (zbar_image_t *dst,
const zbar_format_def_t *dstfmt,
const zbar_image_t *src,
const zbar_format_def_t *srcfmt)
{
if(src->width == dst->width &&
src->height == dst->height) {
zbar_image_t *s = (zbar_image_t*)src;
dst->data = src->data;
dst->datalen = src->datalen;
dst->cleanup = cleanup_ref;
dst->next = s;
_zbar_image_refcnt(s, 1);
}
else
/* NB only for GRAY/YUV_PLANAR formats */
convert_y_resize(dst, dstfmt, src, srcfmt, dst->width * dst->height);
}
/* append neutral UV plane to grayscale image */
static void convert_uvp_append (zbar_image_t *dst,
const zbar_format_def_t *dstfmt,
const zbar_image_t *src,
const zbar_format_def_t *srcfmt)
{
unsigned long n;
uv_roundup(dst, dstfmt);
dst->datalen = uvp_size(dst, dstfmt) * 2;
n = dst->width * dst->height;
dst->datalen += n;
assert(src->datalen >= src->width * src->height);
zprintf(24, "dst=%dx%d (%lx) %lx src=%dx%d %lx\n",
dst->width, dst->height, n, dst->datalen,
src->width, src->height, src->datalen);
dst->data = malloc(dst->datalen);
if(!dst->data) return;
convert_y_resize(dst, dstfmt, src, srcfmt, n);
memset((uint8_t*)dst->data + n, 0x80, dst->datalen - n);
}
/* interleave YUV planes into packed YUV */
static void convert_yuv_pack (zbar_image_t *dst,
const zbar_format_def_t *dstfmt,
const zbar_image_t *src,
const zbar_format_def_t *srcfmt)
{
unsigned long srcm, srcn;
uint8_t flags, *srcy, *dstp;
const uint8_t *srcu, *srcv;
unsigned srcl, xmask, ymask, x, y;
uint8_t y0 = 0, y1 = 0, u = 0x80, v = 0x80;
uv_roundup(dst, dstfmt);
dst->datalen = dst->width * dst->height + uvp_size(dst, dstfmt) * 2;
dst->data = malloc(dst->datalen);
if(!dst->data) return;
dstp = (void*)dst->data;
srcm = uvp_size(src, srcfmt);
srcn = src->width * src->height;
assert(src->datalen >= srcn + 2 * srcn);
flags = dstfmt->p.yuv.packorder ^ srcfmt->p.yuv.packorder;
srcy = (void*)src->data;
if(flags & 1) {
srcv = (uint8_t*)src->data + srcn;
srcu = srcv + srcm;
} else {
srcu = (uint8_t*)src->data + srcn;
srcv = srcu + srcm;
}
flags = dstfmt->p.yuv.packorder & 2;
srcl = src->width >> srcfmt->p.yuv.xsub2;
xmask = (1 << srcfmt->p.yuv.xsub2) - 1;
ymask = (1 << srcfmt->p.yuv.ysub2) - 1;
for(y = 0; y < dst->height; y++) {
if(y >= src->height) {
srcy -= src->width;
srcu -= srcl; srcv -= srcl;
}
else if(y & ymask) {
srcu -= srcl; srcv -= srcl;
}
for(x = 0; x < dst->width; x += 2) {
if(x < src->width) {
y0 = *(srcy++); y1 = *(srcy++);
if(!(x & xmask)) {
u = *(srcu++); v = *(srcv++);
}
}
if(flags) {
*(dstp++) = u; *(dstp++) = y0;
*(dstp++) = v; *(dstp++) = y1;
} else {
*(dstp++) = y0; *(dstp++) = u;
*(dstp++) = y1; *(dstp++) = v;
}
}
for(; x < src->width; x += 2) {
srcy += 2;
if(!(x & xmask)) {
srcu++; srcv++;
}
}
}
}
/* split packed YUV samples and join into YUV planes
* FIXME currently ignores color and grayscales the image
*/
static void convert_yuv_unpack (zbar_image_t *dst,
const zbar_format_def_t *dstfmt,
const zbar_image_t *src,
const zbar_format_def_t *srcfmt)
{
unsigned long dstn, dstm2;
uint8_t *dsty, flags;
const uint8_t *srcp;
unsigned srcl, x, y;
uint8_t y0 = 0, y1 = 0;
uv_roundup(dst, dstfmt);
dstn = dst->width * dst->height;
dstm2 = uvp_size(dst, dstfmt) * 2;
dst->datalen = dstn + dstm2;
dst->data = malloc(dst->datalen);
if(!dst->data) return;
if(dstm2)
memset((uint8_t*)dst->data + dstn, 0x80, dstm2);
dsty = (uint8_t*)dst->data;
flags = srcfmt->p.yuv.packorder ^ dstfmt->p.yuv.packorder;
flags &= 2;
srcp = src->data;
if(flags)
srcp++;
srcl = src->width + (src->width >> srcfmt->p.yuv.xsub2);
for(y = 0; y < dst->height; y++) {
if(y >= src->height)
srcp -= srcl;
for(x = 0; x < dst->width; x += 2) {
if(x < src->width) {
y0 = *(srcp++); srcp++;
y1 = *(srcp++); srcp++;
}
*(dsty++) = y0;
*(dsty++) = y1;
}
if(x < src->width)
srcp += (src->width - x) * 2;
}
}
/* resample and resize UV plane(s)
* FIXME currently ignores color and grayscales the image
*/
static void convert_uvp_resample (zbar_image_t *dst,
const zbar_format_def_t *dstfmt,
const zbar_image_t *src,
const zbar_format_def_t *srcfmt)
{
unsigned long dstn, dstm2;
uv_roundup(dst, dstfmt);
dstn = dst->width * dst->height;
dstm2 = uvp_size(dst, dstfmt) * 2;
dst->datalen = dstn + dstm2;
dst->data = malloc(dst->datalen);
if(!dst->data) return;
convert_y_resize(dst, dstfmt, src, srcfmt, dstn);
if(dstm2)
memset((uint8_t*)dst->data + dstn, 0x80, dstm2);
}
/* rearrange interleaved UV componets */
static void convert_uv_resample (zbar_image_t *dst,
const zbar_format_def_t *dstfmt,
const zbar_image_t *src,
const zbar_format_def_t *srcfmt)
{
unsigned long dstn;
uint8_t *dstp, flags;
const uint8_t *srcp;
unsigned srcl, x, y;
uint8_t y0 = 0, y1 = 0, u = 0x80, v = 0x80;
uv_roundup(dst, dstfmt);
dstn = dst->width * dst->height;
dst->datalen = dstn + uvp_size(dst, dstfmt) * 2;
dst->data = malloc(dst->datalen);
if(!dst->data) return;
dstp = (void*)dst->data;
flags = (srcfmt->p.yuv.packorder ^ dstfmt->p.yuv.packorder) & 1;
srcp = src->data;
srcl = src->width + (src->width >> srcfmt->p.yuv.xsub2);
for(y = 0; y < dst->height; y++) {
if(y >= src->height)
srcp -= srcl;
for(x = 0; x < dst->width; x += 2) {
if(x < src->width) {
if(!(srcfmt->p.yuv.packorder & 2)) {
y0 = *(srcp++); u = *(srcp++);
y1 = *(srcp++); v = *(srcp++);
}
else {
u = *(srcp++); y0 = *(srcp++);
v = *(srcp++); y1 = *(srcp++);
}
if(flags) {
uint8_t tmp = u; u = v; v = tmp;
}
}
if(!(dstfmt->p.yuv.packorder & 2)) {
*(dstp++) = y0; *(dstp++) = u;
*(dstp++) = y1; *(dstp++) = v;
}
else {
*(dstp++) = u; *(dstp++) = y0;
*(dstp++) = v; *(dstp++) = y1;
}
}
if(x < src->width)
srcp += (src->width - x) * 2;
}
}
/* YUV planes to packed RGB
* FIXME currently ignores color and grayscales the image
*/
static void convert_yuvp_to_rgb (zbar_image_t *dst,
const zbar_format_def_t *dstfmt,
const zbar_image_t *src,
const zbar_format_def_t *srcfmt)
{
uint8_t *dstp, *srcy;
int drbits, drbit0, dgbits, dgbit0, dbbits, dbbit0;
unsigned long srcm, srcn;
unsigned x, y;
uint32_t p = 0;
dst->datalen = dst->width * dst->height * dstfmt->p.rgb.bpp;
dst->data = malloc(dst->datalen);
if(!dst->data) return;
dstp = (void*)dst->data;
drbits = RGB_SIZE(dstfmt->p.rgb.red);
drbit0 = RGB_OFFSET(dstfmt->p.rgb.red);
dgbits = RGB_SIZE(dstfmt->p.rgb.green);
dgbit0 = RGB_OFFSET(dstfmt->p.rgb.green);
dbbits = RGB_SIZE(dstfmt->p.rgb.blue);
dbbit0 = RGB_OFFSET(dstfmt->p.rgb.blue);
srcm = uvp_size(src, srcfmt);
srcn = src->width * src->height;
assert(src->datalen >= srcn + 2 * srcm);
srcy = (void*)src->data;
for(y = 0; y < dst->height; y++) {
if(y >= src->height)
srcy -= src->width;
for(x = 0; x < dst->width; x++) {
if(x < src->width) {
/* FIXME color space? */
unsigned y0 = *(srcy++);
p = (((y0 >> drbits) << drbit0) |
((y0 >> dgbits) << dgbit0) |
((y0 >> dbbits) << dbbit0));
}
convert_write_rgb(dstp, p, dstfmt->p.rgb.bpp);
dstp += dstfmt->p.rgb.bpp;
}
if(x < src->width)
srcy += (src->width - x);
}
}
/* packed RGB to YUV planes
* FIXME currently ignores color and grayscales the image
*/
static void convert_rgb_to_yuvp (zbar_image_t *dst,
const zbar_format_def_t *dstfmt,
const zbar_image_t *src,
const zbar_format_def_t *srcfmt)
{
unsigned long dstn, dstm2;
uint8_t *dsty;
const uint8_t *srcp;
int rbits, rbit0, gbits, gbit0, bbits, bbit0;
unsigned srcl, x, y;
uint16_t y0 = 0;
uv_roundup(dst, dstfmt);
dstn = dst->width * dst->height;
dstm2 = uvp_size(dst, dstfmt) * 2;
dst->datalen = dstn + dstm2;
dst->data = malloc(dst->datalen);
if(!dst->data) return;
if(dstm2)
memset((uint8_t*)dst->data + dstn, 0x80, dstm2);
dsty = (void*)dst->data;
assert(src->datalen >= (src->width * src->height * srcfmt->p.rgb.bpp));
srcp = src->data;
rbits = RGB_SIZE(srcfmt->p.rgb.red);
rbit0 = RGB_OFFSET(srcfmt->p.rgb.red);
gbits = RGB_SIZE(srcfmt->p.rgb.green);
gbit0 = RGB_OFFSET(srcfmt->p.rgb.green);
bbits = RGB_SIZE(srcfmt->p.rgb.blue);
bbit0 = RGB_OFFSET(srcfmt->p.rgb.blue);
srcl = src->width * srcfmt->p.rgb.bpp;
for(y = 0; y < dst->height; y++) {
if(y >= src->height)
srcp -= srcl;
for(x = 0; x < dst->width; x++) {
if(x < src->width) {
uint8_t r, g, b;
uint32_t p = convert_read_rgb(srcp, srcfmt->p.rgb.bpp);
srcp += srcfmt->p.rgb.bpp;
/* FIXME endianness? */
r = ((p >> rbit0) << rbits) & 0xff;
g = ((p >> gbit0) << gbits) & 0xff;
b = ((p >> bbit0) << bbits) & 0xff;
/* FIXME color space? */
y0 = ((77 * r + 150 * g + 29 * b) + 0x80) >> 8;
}
*(dsty++) = y0;
}
if(x < src->width)
srcp += (src->width - x) * srcfmt->p.rgb.bpp;
}
}
/* packed YUV to packed RGB */
static void convert_yuv_to_rgb (zbar_image_t *dst,
const zbar_format_def_t *dstfmt,
const zbar_image_t *src,
const zbar_format_def_t *srcfmt)
{
uint8_t *dstp;
unsigned long dstn = dst->width * dst->height;
int drbits, drbit0, dgbits, dgbit0, dbbits, dbbit0;
const uint8_t *srcp;
unsigned srcl, x, y;
uint32_t p = 0;
dst->datalen = dstn * dstfmt->p.rgb.bpp;
dst->data = malloc(dst->datalen);
if(!dst->data) return;
dstp = (void*)dst->data;
drbits = RGB_SIZE(dstfmt->p.rgb.red);
drbit0 = RGB_OFFSET(dstfmt->p.rgb.red);
dgbits = RGB_SIZE(dstfmt->p.rgb.green);
dgbit0 = RGB_OFFSET(dstfmt->p.rgb.green);
dbbits = RGB_SIZE(dstfmt->p.rgb.blue);
dbbit0 = RGB_OFFSET(dstfmt->p.rgb.blue);
assert(src->datalen >= (src->width * src->height +
uvp_size(src, srcfmt) * 2));
srcp = src->data;
if(srcfmt->p.yuv.packorder & 2)
srcp++;
assert(srcfmt->p.yuv.xsub2 == 1);
srcl = src->width + (src->width >> 1);
for(y = 0; y < dst->height; y++) {
if(y >= src->height)
srcp -= srcl;
for(x = 0; x < dst->width; x++) {
if(x < src->width) {
uint8_t y0 = *(srcp++);
srcp++;
if(y0 <= 16)
y0 = 0;
else if(y0 >= 235)
y0 = 255;
else
y0 = (uint16_t)(y0 - 16) * 255 / 219;
p = (((y0 >> drbits) << drbit0) |
((y0 >> dgbits) << dgbit0) |
((y0 >> dbbits) << dbbit0));
}
convert_write_rgb(dstp, p, dstfmt->p.rgb.bpp);
dstp += dstfmt->p.rgb.bpp;
}
if(x < src->width)
srcp += (src->width - x) * 2;
}
}
/* packed RGB to packed YUV
* FIXME currently ignores color and grayscales the image
*/
static void convert_rgb_to_yuv (zbar_image_t *dst,
const zbar_format_def_t *dstfmt,
const zbar_image_t *src,
const zbar_format_def_t *srcfmt)
{
uint8_t *dstp, flags;
const uint8_t *srcp;
int rbits, rbit0, gbits, gbit0, bbits, bbit0;
unsigned srcl, x, y;
uint16_t y0 = 0;
uv_roundup(dst, dstfmt);
dst->datalen = dst->width * dst->height + uvp_size(dst, dstfmt) * 2;
dst->data = malloc(dst->datalen);
if(!dst->data) return;
dstp = (void*)dst->data;
flags = dstfmt->p.yuv.packorder & 2;
assert(src->datalen >= (src->width * src->height * srcfmt->p.rgb.bpp));
srcp = src->data;
rbits = RGB_SIZE(srcfmt->p.rgb.red);
rbit0 = RGB_OFFSET(srcfmt->p.rgb.red);
gbits = RGB_SIZE(srcfmt->p.rgb.green);
gbit0 = RGB_OFFSET(srcfmt->p.rgb.green);
bbits = RGB_SIZE(srcfmt->p.rgb.blue);
bbit0 = RGB_OFFSET(srcfmt->p.rgb.blue);
srcl = src->width * srcfmt->p.rgb.bpp;
for(y = 0; y < dst->height; y++) {
if(y >= src->height)
srcp -= srcl;
for(x = 0; x < dst->width; x++) {
if(x < src->width) {
uint8_t r, g, b;
uint32_t p = convert_read_rgb(srcp, srcfmt->p.rgb.bpp);
srcp += srcfmt->p.rgb.bpp;
/* FIXME endianness? */
r = ((p >> rbit0) << rbits) & 0xff;
g = ((p >> gbit0) << gbits) & 0xff;
b = ((p >> bbit0) << bbits) & 0xff;
/* FIXME color space? */
y0 = ((77 * r + 150 * g + 29 * b) + 0x80) >> 8;
}
if(flags) {
*(dstp++) = 0x80; *(dstp++) = y0;
}
else {
*(dstp++) = y0; *(dstp++) = 0x80;
}
}
if(x < src->width)
srcp += (src->width - x) * srcfmt->p.rgb.bpp;
}
}
/* resample and resize packed RGB components */
static void convert_rgb_resample (zbar_image_t *dst,
const zbar_format_def_t *dstfmt,
const zbar_image_t *src,
const zbar_format_def_t *srcfmt)
{
unsigned long dstn = dst->width * dst->height;
uint8_t *dstp;
int drbits, drbit0, dgbits, dgbit0, dbbits, dbbit0;
int srbits, srbit0, sgbits, sgbit0, sbbits, sbbit0;
const uint8_t *srcp;
unsigned srcl, x, y;
uint32_t p = 0;
dst->datalen = dstn * dstfmt->p.rgb.bpp;
dst->data = malloc(dst->datalen);
if(!dst->data) return;
dstp = (void*)dst->data;
drbits = RGB_SIZE(dstfmt->p.rgb.red);
drbit0 = RGB_OFFSET(dstfmt->p.rgb.red);
dgbits = RGB_SIZE(dstfmt->p.rgb.green);
dgbit0 = RGB_OFFSET(dstfmt->p.rgb.green);
dbbits = RGB_SIZE(dstfmt->p.rgb.blue);
dbbit0 = RGB_OFFSET(dstfmt->p.rgb.blue);
assert(src->datalen >= (src->width * src->height * srcfmt->p.rgb.bpp));
srcp = src->data;
srbits = RGB_SIZE(srcfmt->p.rgb.red);
srbit0 = RGB_OFFSET(srcfmt->p.rgb.red);
sgbits = RGB_SIZE(srcfmt->p.rgb.green);
sgbit0 = RGB_OFFSET(srcfmt->p.rgb.green);
sbbits = RGB_SIZE(srcfmt->p.rgb.blue);
sbbit0 = RGB_OFFSET(srcfmt->p.rgb.blue);
srcl = src->width * srcfmt->p.rgb.bpp;
for(y = 0; y < dst->height; y++) {
if(y >= src->height)
y -= srcl;
for(x = 0; x < dst->width; x++) {
if(x < src->width) {
uint8_t r, g, b;
p = convert_read_rgb(srcp, srcfmt->p.rgb.bpp);
srcp += srcfmt->p.rgb.bpp;
/* FIXME endianness? */
r = (p >> srbit0) << srbits;
g = (p >> sgbit0) << sgbits;
b = (p >> sbbit0) << sbbits;
p = (((r >> drbits) << drbit0) |
((g >> dgbits) << dgbit0) |
((b >> dbbits) << dbbit0));
}
convert_write_rgb(dstp, p, dstfmt->p.rgb.bpp);
dstp += dstfmt->p.rgb.bpp;
}
if(x < src->width)
srcp += (src->width - x) * srcfmt->p.rgb.bpp;
}
}
#ifdef HAVE_LIBJPEG
void _zbar_convert_jpeg_to_y(zbar_image_t *dst,
const zbar_format_def_t *dstfmt,
const zbar_image_t *src,
const zbar_format_def_t *srcfmt);
static void convert_jpeg(zbar_image_t *dst,
const zbar_format_def_t *dstfmt,
const zbar_image_t *src,
const zbar_format_def_t *srcfmt);
#endif
/* group conversion matrix */
static conversion_def_t conversions[][ZBAR_FMT_NUM] = {
{ /* *from* GRAY */
{ 0, convert_copy }, /* to GRAY */
{ 8, convert_uvp_append }, /* to YUV_PLANAR */
{ 24, convert_yuv_pack }, /* to YUV_PACKED */
{ 32, convert_yuvp_to_rgb }, /* to RGB_PACKED */
{ 8, convert_uvp_append }, /* to YUV_NV */
{ -1, NULL }, /* to JPEG */
},
{ /* from YUV_PLANAR */
{ 1, convert_copy }, /* to GRAY */
{ 48, convert_uvp_resample }, /* to YUV_PLANAR */
{ 64, convert_yuv_pack }, /* to YUV_PACKED */
{ 128, convert_yuvp_to_rgb }, /* to RGB_PACKED */
{ 40, convert_uvp_append }, /* to YUV_NV */
{ -1, NULL }, /* to JPEG */
},
{ /* from YUV_PACKED */
{ 24, convert_yuv_unpack }, /* to GRAY */
{ 52, convert_yuv_unpack }, /* to YUV_PLANAR */
{ 20, convert_uv_resample }, /* to YUV_PACKED */
{ 144, convert_yuv_to_rgb }, /* to RGB_PACKED */
{ 18, convert_yuv_unpack }, /* to YUV_NV */
{ -1, NULL }, /* to JPEG */
},
{ /* from RGB_PACKED */
{ 112, convert_rgb_to_yuvp }, /* to GRAY */
{ 160, convert_rgb_to_yuvp }, /* to YUV_PLANAR */
{ 144, convert_rgb_to_yuv }, /* to YUV_PACKED */
{ 120, convert_rgb_resample }, /* to RGB_PACKED */
{ 152, convert_rgb_to_yuvp }, /* to YUV_NV */
{ -1, NULL }, /* to JPEG */
},
{ /* from YUV_NV (FIXME treated as GRAY) */
{ 1, convert_copy }, /* to GRAY */
{ 8, convert_uvp_append }, /* to YUV_PLANAR */
{ 24, convert_yuv_pack }, /* to YUV_PACKED */
{ 32, convert_yuvp_to_rgb }, /* to RGB_PACKED */
{ 8, convert_uvp_append }, /* to YUV_NV */
{ -1, NULL }, /* to JPEG */
},
#ifdef HAVE_LIBJPEG
{ /* from JPEG */
{ 96, _zbar_convert_jpeg_to_y }, /* to GRAY */
{ 104, convert_jpeg }, /* to YUV_PLANAR */
{ 116, convert_jpeg }, /* to YUV_PACKED */
{ 256, convert_jpeg }, /* to RGB_PACKED */
{ 104, convert_jpeg }, /* to YUV_NV */
{ -1, NULL }, /* to JPEG */
},
#else
{ /* from JPEG */
{ -1, NULL }, /* to GRAY */
{ -1, NULL }, /* to YUV_PLANAR */
{ -1, NULL }, /* to YUV_PACKED */
{ -1, NULL }, /* to RGB_PACKED */
{ -1, NULL }, /* to YUV_NV */
{ -1, NULL }, /* to JPEG */
},
#endif
};
const zbar_format_def_t *_zbar_format_lookup (uint32_t fmt)
{
const zbar_format_def_t *def = NULL;
int i = 0;
while(i < num_format_defs) {
def = &format_defs[i];
if(fmt == def->format)
return(def);
i = i * 2 + 1;
if(fmt > def->format)
i++;
}
return(NULL);
}
#ifdef HAVE_LIBJPEG
/* convert JPEG data via an intermediate format supported by libjpeg */
static void convert_jpeg (zbar_image_t *dst,
const zbar_format_def_t *dstfmt,
const zbar_image_t *src,
const zbar_format_def_t *srcfmt)
{
/* define intermediate image in a format supported by libjpeg
* (currently only grayscale)
*/
zbar_image_t *tmp;
if(!src->src) {
tmp = zbar_image_create();
tmp->format = fourcc('Y','8','0','0');
_zbar_image_copy_size(tmp, dst);
}
else {
tmp = src->src->jpeg_img;
assert(tmp);
_zbar_image_copy_size(dst, tmp);
}
const zbar_format_def_t *tmpfmt = _zbar_format_lookup(tmp->format);
assert(tmpfmt);
/* convert to intermediate format */
_zbar_convert_jpeg_to_y(tmp, tmpfmt, src, srcfmt);
/* now convert to dst */
_zbar_image_copy_size(dst, tmp);
conversion_handler_t *func =
conversions[tmpfmt->group][dstfmt->group].func;
func(dst, dstfmt, tmp, tmpfmt);
if(!src->src)
zbar_image_destroy(tmp);
}
#endif
zbar_image_t *zbar_image_convert_resize (const zbar_image_t *src,
unsigned long fmt,
unsigned width,
unsigned height)
{