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/* -*- C++ -*-
* File: mem_image.cpp
* Copyright 2008-2009 Alex Tutubalin <lexa@lexa.ru>
* Created: Sat Mar 8 , 2008
*
* LibRaw mem_image/mem_thumb API test. Resuls should be same (bitwise) as in dcraw [-4] [-e]
* Testing note: for ppm-thumbnails you should use dcraw -w -e for thumbnail extraction
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "libraw/libraw.h"
#ifdef WIN32
#define snprintf _snprintf
#include <winsock2.h>
#pragma comment(lib, "ws2_32.lib")
#else
#include <netinet/in.h>
#endif
// no error reporting, only params check
void write_ppm(libraw_processed_image_t *img, const char *basename)
{
if(!img) return;
// type SHOULD be LIBRAW_IMAGE_BITMAP, but we'll check
if(img->type != LIBRAW_IMAGE_BITMAP) return;
// only 3-color images supported...
if(img->colors != 3) return;
char fn[1024];
snprintf(fn,1024,"%s.ppm",basename);
FILE *f = fopen(fn,"wb");
if(!f) return;
fprintf (f, "P6\n%d %d\n%d\n", img->width, img->height, (1 << img->bits)-1);
/*
NOTE:
data in img->data is not converted to network byte order.
So, we should swap values on some architectures for dcraw compatibility
(unfortunately, xv cannot display 16-bit PPMs with network byte order data
*/
#define SWAP(a,b) { a ^= b; a ^= (b ^= a); }
if (img->bits == 16 && htons(0x55aa) != 0x55aa)
for(int i=0; i< img->data_size; i+=2)
SWAP(img->data[i],img->data[i+1]);
#undef SWAP
fwrite(img->data,img->data_size,1,f);
fclose(f);
}
void write_thumb(libraw_processed_image_t *img, const char *basename)
{
if(!img) return;
if(img->type == LIBRAW_IMAGE_BITMAP)
{
char fnt[1024];
snprintf(fnt,1024,"%s.thumb",basename);
write_ppm(img,fnt);
}
else if (img->type == LIBRAW_IMAGE_JPEG)
{
char fn[1024];
snprintf(fn,1024,"%s.thumb.jpg",basename);
FILE *f = fopen(fn,"wb");
if(!f) return;
fwrite(img->data,img->data_size,1,f);
fclose(f);
}
}
int main(int ac, char *av[])
{
int i, ret, verbose=0, output_thumbs=0;
// don't use fixed size buffers in real apps!
char outfn[1024],thumbfn[1024];
LibRaw RawProcessor;
if(ac<2)
{
printf(
"mem_image - LibRaw sample, to illustrate work for memory buffers. Emulates dcraw [-4] [-1] [-e]\n"
"Usage: %s [-D] [-T] [-v] [-e] raw-files....\n"
"\t-4 - output 16-bit PPM\n"
"\t-1 - gamma-correct 16-bit data\n"
"\t-e - extract thumbnails (same as dcraw -e in separate run)\n",
av[0]);
return 0;
}
putenv ((char*)"TZ=UTC"); // dcraw compatibility, affects TIFF datestamp field
#define P1 RawProcessor.imgdata.idata
#define S RawProcessor.imgdata.sizes
#define C RawProcessor.imgdata.color
#define T RawProcessor.imgdata.thumbnail
#define P2 RawProcessor.imgdata.other
#define OUT RawProcessor.imgdata.params
for (i=1;i<ac;i++)
{
if(av[i][0]=='-')
{
if(av[i][1]=='4' && av[i][2]==0)
OUT.output_bps = 16;
if(av[i][1]=='1' && av[i][2]==0)
OUT.gamma_16bit = 1;
if(av[i][1]=='e' && av[i][2]==0)
output_thumbs++;
continue;
}
printf("Processing %s\n",av[i]);
if( (ret = RawProcessor.open_file(av[i])) != LIBRAW_SUCCESS)
{
fprintf(stderr,"Cannot open %s: %s\n",av[i],libraw_strerror(ret));
continue; // no recycle b/c open file will recycle itself
}
if( (ret = RawProcessor.unpack() ) != LIBRAW_SUCCESS)
{
fprintf(stderr,"Cannot unpack %s: %s\n",av[i],libraw_strerror(ret));
continue;
}
// we should call dcraw_process before thumbnail extraction because for
// some cameras (i.e. Kodak ones) white balance for thumbnal should be set
// from main image settings
ret = RawProcessor.dcraw_process();
if(LIBRAW_SUCCESS !=ret)
{
fprintf(stderr,"Cannot do postpocessing on %s: %s\n",
av[i],libraw_strerror(ret));
if(LIBRAW_FATAL_ERROR(ret))
continue;
}
libraw_processed_image_t *image = RawProcessor.dcraw_make_mem_image(&ret);
if(image)
{
write_ppm(image,av[i]);
free(image);
}
else
fprintf(stderr,"Cannot unpack %s to memory buffer: %s\n" , av[i],libraw_strerror(ret));
if(output_thumbs)
{
if( (ret = RawProcessor.unpack_thumb() ) != LIBRAW_SUCCESS)
{
fprintf(stderr,"Cannot unpack_thumb %s: %s\n",av[i],libraw_strerror(ret));
if(LIBRAW_FATAL_ERROR(ret))
continue; // skip to next file
}
else
{
libraw_processed_image_t *thumb = RawProcessor.dcraw_make_mem_thumb(&ret);
if(thumb)
{
write_thumb(thumb,av[i]);
free(thumb);
}
else
fprintf(stderr,"Cannot unpack thumbnail of %s to memory buffer: %s\n" , av[i],libraw_strerror(ret));
}
}
RawProcessor.recycle(); // just for show this call
}
return 0;
}
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