libs/libkdcraw/libraw/samples/mem_image.cpp

   1 /* -*- C++ -*-
   2  * File: mem_image.cpp
   3  * Copyright 2008 Alex Tutubalin <lexa@lexa.ru>
   4  * Created: Sat Mar  8 , 2008
   5  *
   6  * LibRaw mem_image/mem_thumb API test. Resuls should be same (bitwise) as in dcraw [-4] [-e]
   7  *   Testing note: for ppm-thumbnails you should use dcraw -w -e for thumbnail extraction
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2, or (at your option)
  12  * any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  22  * 02111-1307, USA.
  23  */
  24 #include <stdio.h>
  25 #include <string.h>
  26 #include <math.h>
  27
  28 #include "libraw/libraw.h"
  29
  30 #ifdef WIN32
  31 #define snprintf _snprintf
  32 #include <winsock2.h>
  33 #pragma comment(lib, "ws2_32.lib")
  34 #else
  35 #include <netinet/in.h>
  36 #endif
  37
  38
  39 // no error reporting, only params check
  40 void write_ppm(libraw_processed_image_t *img, const char *basename)
  41 {
  42     if(!img) return;
  43     // type SHOULD be LIBRAW_IMAGE_BITMAP, but we'll check
  44     if(img->type != LIBRAW_IMAGE_BITMAP) return;
  45     // only 3-color images supported...
  46     if(img->colors != 3) return;
  47
  48     char fn[1024];
  49     snprintf(fn,1024,"%s.ppm",basename);
  50     FILE *f = fopen(fn,"wb");
  51     if(!f) return;
  52     fprintf (f, "P6\n%d %d\n%d\n", img->width, img->height, (1 << img->bits)-1);
  53 /*
  54   NOTE:
  55   data in img->data is not converted to network byte order.
  56   So, we should swap values on some architectures for dcraw compatibility
  57   (unfortunately, xv cannot display 16-bit PPMs with network byte order data
  58 */
  59 #define SWAP(a,b) { a ^= b; a ^= (b ^= a); }
  60     if (img->bits == 16 && htons(0x55aa) != 0x55aa)
  61         for(int i=0; i< img->data_size; i+=2)
  62             SWAP(img->data[i],img->data[i+1]);
  63 #undef SWAP
  64
  65     fwrite(img->data,img->data_size,1,f);
  66     fclose(f);
  67 }
  68
  69 void write_thumb(libraw_processed_image_t *img, const char *basename)
  70 {
  71     if(!img) return;
  72
  73     if(img->type == LIBRAW_IMAGE_BITMAP)
  74         {
  75             char fnt[1024];
  76             snprintf(fnt,1024,"%s.thumb",basename);
  77             write_ppm(img,fnt);
  78         }
  79     else if (img->type == LIBRAW_IMAGE_JPEG)
  80         {
  81             char fn[1024];
  82             snprintf(fn,1024,"%s.thumb.jpg",basename);
  83             FILE *f = fopen(fn,"wb");
  84             if(!f) return;
  85             fwrite(img->data,img->data_size,1,f);
  86             fclose(f);
  87         }
  88 }
  89
  90
  91
  92 int main(int ac, char *av[])
  93 {
  94     int  i, ret, verbose=0, output_thumbs=0;
  95
  96     // don't use fixed size buffers in real apps!
  97     char outfn[1024],thumbfn[1024];
  98
  99     LibRaw RawProcessor;
 100
 101     if(ac<2)
 102         {
 103             printf(
 104                 "mem_image - LibRaw sample, to illustrate work for memory buffers. Emulates dcraw [-4] [-1] [-e]\n"
 105                 "Usage: %s [-D] [-T] [-v] [-e] raw-files....\n"
 106                 "\t-4 - output 16-bit PPM\n"
 107                 "\t-1 - gamma-correct 16-bit data\n"
 108                 "\t-e - extract thumbnails (same as dcraw -e in separate run)\n",
 109                 av[0]);
 110             return 0;
 111         }
 112
 113     putenv ((char*)"TZ=UTC"); // dcraw compatibility, affects TIFF datestamp field
 114
 115 #define P1 RawProcessor.imgdata.idata
 116 #define S RawProcessor.imgdata.sizes
 117 #define C RawProcessor.imgdata.color
 118 #define T RawProcessor.imgdata.thumbnail
 119 #define P2 RawProcessor.imgdata.other
 120 #define OUT RawProcessor.imgdata.params
 121
 122
 123     for (i=1;i<ac;i++)
 124         {
 125             if(av[i][0]=='-')
 126                 {
 127                     if(av[i][1]=='4' && av[i][2]==0)
 128                         OUT.output_bps = 16;
 129                     if(av[i][1]=='1' && av[i][2]==0)
 130                         OUT.gamma_16bit = 1;
 131                     if(av[i][1]=='e' && av[i][2]==0)
 132                         output_thumbs++;
 133                     continue;
 134                 }
 135             printf("Processing %s\n",av[i]);
 136             if( (ret = RawProcessor.open_file(av[i])) != LIBRAW_SUCCESS)
 137                 {
 138                     fprintf(stderr,"Cannot open %s: %s\n",av[i],libraw_strerror(ret));
 139                     continue; // no recycle b/c open file will recycle itself
 140                 }
 141
 142
 143             if( (ret = RawProcessor.unpack() ) != LIBRAW_SUCCESS)
 144                 {
 145                     fprintf(stderr,"Cannot unpack %s: %s\n",av[i],libraw_strerror(ret));
 146                     continue;
 147                 }
 148
 149             // we should call dcraw_process before thumbnail extraction because for
 150             // some cameras (i.e. Kodak ones) white balance for thumbnal should be set
 151             // from main image settings
 152
 153
 154             ret = RawProcessor.dcraw_process();
 155
 156             if(LIBRAW_SUCCESS !=ret)
 157                 {
 158                     fprintf(stderr,"Cannot do postpocessing on %s: %s\n",
 159                             av[i],libraw_strerror(ret));
 160                     if(LIBRAW_FATAL_ERROR(ret))
 161                         continue;
 162                 }
 163             libraw_processed_image_t *image = RawProcessor.dcraw_make_mem_image(&ret);
 164             if(image)
 165                 {
 166                     write_ppm(image,av[i]);
 167                     free(image);
 168                 }
 169             else
 170                 fprintf(stderr,"Cannot unpack %s to memory buffer: %s\n" , av[i],libraw_strerror(ret));
 171
 172             if(output_thumbs)
 173                 {
 174
 175                     if( (ret = RawProcessor.unpack_thumb() ) != LIBRAW_SUCCESS)
 176                         {
 177                             fprintf(stderr,"Cannot unpack_thumb %s: %s\n",av[i],libraw_strerror(ret));
 178                             if(LIBRAW_FATAL_ERROR(ret))
 179                                 continue; // skip to next file
 180                         }
 181                     else
 182                         {
 183                             libraw_processed_image_t *thumb = RawProcessor.dcraw_make_mem_thumb(&ret);
 184                             if(thumb)
 185                                 {
 186                                     write_thumb(thumb,av[i]);
 187                                     free(thumb);
 188                                 }
 189                             else
 190                                 fprintf(stderr,"Cannot unpack thumbnail of %s to memory buffer: %s\n" , av[i],libraw_strerror(ret));
 191                         }
 192
 193                 }
 194
 195             RawProcessor.recycle(); // just for show this call
 196         }
 197     return 0;
 198 }