src/image-load-j2k.cc

   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 struct ImageLoaderJ2K {
  33         ImageLoaderBackendCbAreaUpdated area_updated_cb;
  34         ImageLoaderBackendCbSize size_cb;
  35         ImageLoaderBackendCbAreaPrepared area_prepared_cb;
  36         gpointer data;
  37         GdkPixbuf *pixbuf;
  38         guint requested_width;
  39         guint requested_height;
  40         gboolean abort;
  41 };
  42
  43 static void free_buffer(guchar *pixels, gpointer)
  44 {
  45         g_free (pixels);
  46 }
  47
  48 struct opj_buffer_info_t {
  49     OPJ_BYTE* buf;
  50     OPJ_BYTE* cur;
  51     OPJ_SIZE_T len;
  52 };
  53
  54 static OPJ_SIZE_T opj_read_from_buffer (void* pdst, OPJ_SIZE_T len, opj_buffer_info_t* psrc)
  55 {
  56     OPJ_SIZE_T n = psrc->buf + psrc->len - psrc->cur;
  57
  58     if (n) {
  59         if (n > len)
  60             n = len;
  61
  62         memcpy (pdst, psrc->cur, n);
  63         psrc->cur += n;
  64     }
  65     else
  66         n = static_cast<OPJ_SIZE_T>(-1);
  67
  68     return n;
  69 }
  70
  71 static OPJ_SIZE_T opj_write_to_buffer (void* p_buffer, OPJ_SIZE_T p_nb_bytes,
  72                      opj_buffer_info_t* p_source_buffer)
  73 {
  74     void* pbuf = p_source_buffer->buf;
  75     void* pcur = p_source_buffer->cur;
  76
  77     OPJ_SIZE_T len = p_source_buffer->len;
  78
  79     if (0 == len)
  80         len = 1;
  81
  82     OPJ_SIZE_T dist = static_cast<guchar *>(pcur) - static_cast<guchar *>(pbuf);
  83     OPJ_SIZE_T 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 (nullptr == pbuf)
  95             return static_cast<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 = static_cast<OPJ_BYTE *>(pbuf);
 103         p_source_buffer->cur = static_cast<guchar *>(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 = static_cast<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 > static_cast<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 nullptr;
 145
 146     opj_stream_t* ps = opj_stream_default_create (input);
 147
 148     if (nullptr == ps)
 149         return nullptr;
 150
 151     opj_stream_set_user_data        (ps, psrc, nullptr);
 152     opj_stream_set_user_data_length (ps, psrc->len);
 153
 154     if (input)
 155         opj_stream_set_read_function (
 156             ps, reinterpret_cast<opj_stream_read_fn>(opj_read_from_buffer));
 157     else
 158         opj_stream_set_write_function(
 159             ps,reinterpret_cast<opj_stream_write_fn>(opj_write_to_buffer));
 160
 161     opj_stream_set_skip_function (
 162         ps, reinterpret_cast<opj_stream_skip_fn>(opj_skip_from_buffer));
 163
 164     opj_stream_set_seek_function (
 165         ps, reinterpret_cast<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 **)
 171 {
 172         auto ld = static_cast<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;
 181         gint j;
 182         gint k;
 183         guchar *pixels;
 184         gint  bytes_per_pixel;
 185         opj_buffer_info_t *decode_buffer;
 186     guchar *buf_copy;
 187
 188         stream = nullptr;
 189         codec = nullptr;
 190         image = nullptr;
 191
 192         buf_copy = static_cast<guchar *>(g_malloc(count));
 193         memcpy(buf_copy, buf, count);
 194
 195         decode_buffer = g_new0(opj_buffer_info_t, 1);
 196         decode_buffer->buf = buf_copy;
 197         decode_buffer->len = count;
 198         decode_buffer->cur = buf_copy;
 199
 200         stream = opj_stream_create_buffer_stream(decode_buffer, OPJ_TRUE);
 201
 202         if (!stream)
 203                 {
 204                 log_printf(_("Could not open file for reading"));
 205                 return FALSE;
 206                 }
 207
 208         if (memcmp(buf_copy + 20, "jp2", 3) == 0)
 209                 {
 210                 codec = opj_create_decompress(OPJ_CODEC_JP2);
 211                 }
 212         else
 213                 {
 214                 log_printf(_("Unknown jpeg2000 decoder type"));
 215                 return FALSE;
 216                 }
 217
 218         opj_set_default_decoder_parameters(&parameters);
 219         if (opj_setup_decoder (codec, &parameters) != OPJ_TRUE)
 220                 {
 221                 log_printf(_("Couldn't set parameters on decoder for file."));
 222                 return FALSE;
 223                 }
 224
 225         opj_codec_set_threads(codec, get_cpu_cores());
 226
 227         if (opj_read_header(stream, codec, &image) != OPJ_TRUE)
 228                 {
 229                 log_printf(_("Couldn't read JP2 header from file"));
 230                 return FALSE;
 231                 }
 232
 233         if (opj_decode(codec, stream, image) != OPJ_TRUE)
 234                 {
 235                 log_printf(_("Couldn't decode JP2 image in file"));
 236                 return FALSE;
 237                 }
 238
 239         if (opj_end_decompress(codec, stream) != OPJ_TRUE)
 240                 {
 241                 log_printf(_("Couldn't decompress JP2 image in file"));
 242                 return FALSE;
 243                 }
 244
 245         num_components = image->numcomps;
 246         if (num_components != 3)
 247                 {
 248                 log_printf(_("JP2 image not rgb"));
 249                 return FALSE;
 250                 }
 251
 252         width = image->comps[0].w;
 253         height = image->comps[0].h;
 254
 255         bytes_per_pixel = 3;
 256
 257         pixels = g_new0(guchar, width * bytes_per_pixel * height);
 258         for (i = 0; i < height; i++)
 259                 {
 260                 for (j = 0; j < num_components; j++)
 261                         {
 262                         for (k = 0; k < width; k++)
 263                                 {
 264                                 pixels[(k * bytes_per_pixel + j) + (i * width * bytes_per_pixel)] =   image->comps[j].data[i * width + k];
 265                                 }
 266                         }
 267                 }
 268
 269         ld->pixbuf = gdk_pixbuf_new_from_data(pixels, GDK_COLORSPACE_RGB, FALSE , 8, width, height, width * bytes_per_pixel, free_buffer, nullptr);
 270
 271         ld->area_updated_cb(loader, 0, 0, width, height, ld->data);
 272
 273         g_free(decode_buffer);
 274         g_free(buf_copy);
 275         if (image)
 276                 opj_image_destroy (image);
 277         if (codec)
 278                 opj_destroy_codec (codec);
 279         if (stream)
 280                 opj_stream_destroy (stream);
 281
 282         return TRUE;
 283 }
 284
 285 static gpointer image_loader_j2k_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
 286 {
 287         auto loader = g_new0(ImageLoaderJ2K, 1);
 288         loader->area_updated_cb = area_updated_cb;
 289         loader->size_cb = size_cb;
 290         loader->area_prepared_cb = area_prepared_cb;
 291         loader->data = data;
 292         return loader;
 293 }
 294
 295 static void image_loader_j2k_set_size(gpointer loader, int width, int height)
 296 {
 297         auto ld = static_cast<ImageLoaderJ2K *>(loader);
 298         ld->requested_width = width;
 299         ld->requested_height = height;
 300 }
 301
 302 static GdkPixbuf* image_loader_j2k_get_pixbuf(gpointer loader)
 303 {
 304         auto ld = static_cast<ImageLoaderJ2K *>(loader);
 305         return ld->pixbuf;
 306 }
 307
 308 static gchar* image_loader_j2k_get_format_name(gpointer)
 309 {
 310         return g_strdup("j2k");
 311 }
 312
 313 static gchar** image_loader_j2k_get_format_mime_types(gpointer)
 314 {
 315         static const gchar *mime[] = {"image/jp2", nullptr};
 316         return g_strdupv(const_cast<gchar **>(mime));
 317 }
 318
 319 static gboolean image_loader_j2k_close(gpointer, GError **)
 320 {
 321         return TRUE;
 322 }
 323
 324 static void image_loader_j2k_abort(gpointer loader)
 325 {
 326         auto ld = static_cast<ImageLoaderJ2K *>(loader);
 327         ld->abort = TRUE;
 328 }
 329
 330 static void image_loader_j2k_free(gpointer loader)
 331 {
 332         auto ld = static_cast<ImageLoaderJ2K *>(loader);
 333         if (ld->pixbuf) g_object_unref(ld->pixbuf);
 334         g_free(ld);
 335 }
 336
 337 void image_loader_backend_set_j2k(ImageLoaderBackend *funcs)
 338 {
 339         funcs->loader_new = image_loader_j2k_new;
 340         funcs->set_size = image_loader_j2k_set_size;
 341         funcs->load = image_loader_j2k_load;
 342         funcs->write = nullptr;
 343         funcs->get_pixbuf = image_loader_j2k_get_pixbuf;
 344         funcs->close = image_loader_j2k_close;
 345         funcs->abort = image_loader_j2k_abort;
 346         funcs->free = image_loader_j2k_free;
 347         funcs->get_format_name = image_loader_j2k_get_format_name;
 348         funcs->get_format_mime_types = image_loader_j2k_get_format_mime_types;
 349 }
 350
 351 #endif
 352 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */