src/image_load_j2k.c

   1 /*
   2  * Copyright (C) 20019 - The Geeqie Team
   3  *
   4  * Author: Colin Clark
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #include "main.h"
  22
  23 #include "image-load.h"
  24 #include "image_load_j2k.h"
  25
  26 #include "misc.h"
  27
  28 #ifdef HAVE_J2K
  29
  30 #include "openjpeg.h"
  31
  32 typedef struct _ImageLoaderJ2K ImageLoaderJ2K;
  33 struct _ImageLoaderJ2K {
  34         ImageLoaderBackendCbAreaUpdated area_updated_cb;
  35         ImageLoaderBackendCbSize size_cb;
  36         ImageLoaderBackendCbAreaPrepared area_prepared_cb;
  37         gpointer data;
  38         GdkPixbuf *pixbuf;
  39         guint requested_width;
  40         guint requested_height;
  41         gboolean abort;
  42 };
  43
  44 static void free_buffer(guchar *pixels, gpointer data)
  45 {
  46         g_free (pixels);
  47 }
  48
  49 typedef struct opj_buffer_info {
  50     OPJ_BYTE* buf;
  51     OPJ_BYTE* cur;
  52     OPJ_SIZE_T len;
  53 } opj_buffer_info_t;
  54
  55 static OPJ_SIZE_T opj_read_from_buffer (void* pdst, OPJ_SIZE_T len, opj_buffer_info_t* psrc)
  56 {
  57     OPJ_SIZE_T n = psrc->buf + psrc->len - psrc->cur;
  58
  59     if (n) {
  60         if (n > len)
  61             n = len;
  62
  63         memcpy (pdst, psrc->cur, n);
  64         psrc->cur += n;
  65     }
  66     else
  67         n = (OPJ_SIZE_T)-1;
  68
  69     return n;
  70 }
  71
  72 static OPJ_SIZE_T opj_write_to_buffer (void* p_buffer, OPJ_SIZE_T p_nb_bytes,
  73                      opj_buffer_info_t* p_source_buffer)
  74 {
  75     void* pbuf = p_source_buffer->buf;
  76     void* pcur = p_source_buffer->cur;
  77
  78     OPJ_SIZE_T len = p_source_buffer->len;
  79
  80     if (0 == len)
  81         len = 1;
  82
  83     OPJ_SIZE_T dist = pcur - pbuf, n = len - dist;
  84     g_assert (dist <= len);
  85
  86     while (n < p_nb_bytes) {
  87         len *= 2;
  88         n = len - dist;
  89     }
  90
  91     if (len != p_source_buffer->len) {
  92         pbuf = malloc (len);
  93
  94         if (0 == pbuf)
  95             return (OPJ_SIZE_T)-1;
  96
  97         if (p_source_buffer->buf) {
  98             memcpy (pbuf, p_source_buffer->buf, dist);
  99             free (p_source_buffer->buf);
 100         }
 101
 102         p_source_buffer->buf = pbuf;
 103         p_source_buffer->cur = pbuf + dist;
 104         p_source_buffer->len = len;
 105     }
 106
 107     memcpy (p_source_buffer->cur, p_buffer, p_nb_bytes);
 108     p_source_buffer->cur += p_nb_bytes;
 109
 110     return p_nb_bytes;
 111 }
 112
 113 static OPJ_SIZE_T opj_skip_from_buffer (OPJ_SIZE_T len, opj_buffer_info_t* psrc)
 114 {
 115     OPJ_SIZE_T n = psrc->buf + psrc->len - psrc->cur;
 116
 117     if (n) {
 118         if (n > len)
 119             n = len;
 120
 121         psrc->cur += len;
 122     }
 123     else
 124         n = (OPJ_SIZE_T)-1;
 125
 126     return n;
 127 }
 128
 129 static OPJ_BOOL opj_seek_from_buffer (OPJ_OFF_T len, opj_buffer_info_t* psrc)
 130 {
 131     OPJ_SIZE_T n = psrc->len;
 132
 133     if (n > (gulong)len)
 134         n = len;
 135
 136     psrc->cur = psrc->buf + n;
 137
 138     return OPJ_TRUE;
 139 }
 140
 141 opj_stream_t* OPJ_CALLCONV opj_stream_create_buffer_stream (opj_buffer_info_t* psrc, OPJ_BOOL input)
 142 {
 143     if (!psrc)
 144         return 0;
 145
 146     opj_stream_t* ps = opj_stream_default_create (input);
 147
 148     if (0 == ps)
 149         return 0;
 150
 151     opj_stream_set_user_data        (ps, psrc, 0);
 152     opj_stream_set_user_data_length (ps, psrc->len);
 153
 154     if (input)
 155         opj_stream_set_read_function (
 156             ps, (opj_stream_read_fn)opj_read_from_buffer);
 157     else
 158         opj_stream_set_write_function(
 159             ps,(opj_stream_write_fn) opj_write_to_buffer);
 160
 161     opj_stream_set_skip_function (
 162         ps, (opj_stream_skip_fn)opj_skip_from_buffer);
 163
 164     opj_stream_set_seek_function (
 165         ps, (opj_stream_seek_fn)opj_seek_from_buffer);
 166
 167     return ps;
 168 }
 169
 170 static gboolean image_loader_j2k_load(gpointer loader, const guchar *buf, gsize count, GError **error)
 171 {
 172         ImageLoaderJ2K *ld = (ImageLoaderJ2K *) loader;
 173         opj_stream_t *stream;
 174         opj_codec_t *codec;
 175         opj_dparameters_t parameters;
 176         opj_image_t *image;
 177         gint width;
 178         gint height;
 179         gint num_components;
 180         gint i, j, k;
 181         guchar *pixels;
 182         gint  bytes_per_pixel;
 183         opj_buffer_info_t *decode_buffer;
 184     guchar *buf_copy;
 185
 186         stream = NULL;
 187         codec = NULL;
 188         image = NULL;
 189
 190         buf_copy = (guchar *) g_malloc(count);
 191         memcpy(buf_copy, buf, count);
 192
 193         decode_buffer = g_new0(opj_buffer_info_t, 1);
 194         decode_buffer->buf = buf_copy;
 195         decode_buffer->len = count;
 196         decode_buffer->cur = buf_copy;
 197
 198         stream = opj_stream_create_buffer_stream(decode_buffer, OPJ_TRUE);
 199
 200         if (!stream)
 201                 {
 202                 log_printf(_("Could not open file for reading"));
 203                 return FALSE;
 204                 }
 205
 206         if (memcmp(buf_copy + 20, "jp2", 3) == 0)
 207                 {
 208                 codec = opj_create_decompress(OPJ_CODEC_JP2);
 209                 }
 210         else
 211                 {
 212                 log_printf(_("Unknown jpeg2000 decoder type"));
 213                 return FALSE;
 214                 }
 215
 216         opj_set_default_decoder_parameters(&parameters);
 217         if (opj_setup_decoder (codec, &parameters) != OPJ_TRUE)
 218                 {
 219                 log_printf(_("Couldn't set parameters on decoder for file."));
 220                 return FALSE;
 221                 }
 222
 223         opj_codec_set_threads(codec, get_cpu_cores());
 224
 225         if (opj_read_header(stream, codec, &image) != OPJ_TRUE)
 226                 {
 227                 log_printf(_("Couldn't read JP2 header from file"));
 228                 return FALSE;
 229                 }
 230
 231         if (opj_decode(codec, stream, image) != OPJ_TRUE)
 232                 {
 233                 log_printf(_("Couldn't decode JP2 image in file"));
 234                 return FALSE;
 235                 }
 236
 237         if (opj_end_decompress(codec, stream) != OPJ_TRUE)
 238                 {
 239                 log_printf(_("Couldn't decompress JP2 image in file"));
 240                 return FALSE;
 241                 }
 242
 243         num_components = image->numcomps;
 244         if (num_components != 3)
 245                 {
 246                 log_printf(_("JP2 image not rgb"));
 247                 return FALSE;
 248                 }
 249
 250         width = image->comps[0].w;
 251         height = image->comps[0].h;
 252
 253         bytes_per_pixel = 3;
 254
 255         pixels = g_new0(guchar, width * bytes_per_pixel * height);
 256         for (i = 0; i < height; i++)
 257                 {
 258                 for (j = 0; j < num_components; j++)
 259                         {
 260                         for (k = 0; k < width; k++)
 261                                 {
 262                                 pixels[(k * bytes_per_pixel + j) + (i * width * bytes_per_pixel)] =   image->comps[j].data[i * width + k];
 263                                 }
 264                         }
 265                 }
 266
 267         ld->pixbuf = gdk_pixbuf_new_from_data(pixels, GDK_COLORSPACE_RGB, FALSE , 8, width, height, width * bytes_per_pixel, free_buffer, NULL);
 268
 269         ld->area_updated_cb(loader, 0, 0, width, height, ld->data);
 270
 271         g_free(decode_buffer);
 272         g_free(buf_copy);
 273         if (image)
 274                 opj_image_destroy (image);
 275         if (codec)
 276                 opj_destroy_codec (codec);
 277         if (stream)
 278                 opj_stream_destroy (stream);
 279
 280         return TRUE;
 281 }
 282
 283 static gpointer image_loader_j2k_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
 284 {
 285         ImageLoaderJ2K *loader = g_new0(ImageLoaderJ2K, 1);
 286         loader->area_updated_cb = area_updated_cb;
 287         loader->size_cb = size_cb;
 288         loader->area_prepared_cb = area_prepared_cb;
 289         loader->data = data;
 290         return (gpointer) loader;
 291 }
 292
 293 static void image_loader_j2k_set_size(gpointer loader, int width, int height)
 294 {
 295         ImageLoaderJ2K *ld = (ImageLoaderJ2K *) loader;
 296         ld->requested_width = width;
 297         ld->requested_height = height;
 298 }
 299
 300 static GdkPixbuf* image_loader_j2k_get_pixbuf(gpointer loader)
 301 {
 302         ImageLoaderJ2K *ld = (ImageLoaderJ2K *) loader;
 303         return ld->pixbuf;
 304 }
 305
 306 static gchar* image_loader_j2k_get_format_name(gpointer loader)
 307 {
 308         return g_strdup("j2k");
 309 }
 310
 311 static gchar** image_loader_j2k_get_format_mime_types(gpointer loader)
 312 {
 313         static gchar *mime[] = {"image/jp2", NULL};
 314         return g_strdupv(mime);
 315 }
 316
 317 static gboolean image_loader_j2k_close(gpointer loader, GError **error)
 318 {
 319         return TRUE;
 320 }
 321
 322 static void image_loader_j2k_abort(gpointer loader)
 323 {
 324         ImageLoaderJ2K *ld = (ImageLoaderJ2K *) loader;
 325         ld->abort = TRUE;
 326 }
 327
 328 static void image_loader_j2k_free(gpointer loader)
 329 {
 330         ImageLoaderJ2K *ld = (ImageLoaderJ2K *) loader;
 331         if (ld->pixbuf) g_object_unref(ld->pixbuf);
 332         g_free(ld);
 333 }
 334
 335 void image_loader_backend_set_j2k(ImageLoaderBackend *funcs)
 336 {
 337         funcs->loader_new = image_loader_j2k_new;
 338         funcs->set_size = image_loader_j2k_set_size;
 339         funcs->load = image_loader_j2k_load;
 340         funcs->write = NULL;
 341         funcs->get_pixbuf = image_loader_j2k_get_pixbuf;
 342         funcs->close = image_loader_j2k_close;
 343         funcs->abort = image_loader_j2k_abort;
 344         funcs->free = image_loader_j2k_free;
 345         funcs->get_format_name = image_loader_j2k_get_format_name;
 346         funcs->get_format_mime_types = image_loader_j2k_get_format_mime_types;
 347 }
 348
 349 #endif
 350 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */