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/*
* Copyright (C) 2011, Nokia <ivan.frade@nokia.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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 General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <setjmp.h>
#include <jpeglib.h>
#include <glib.h>
#include <gio/gio.h>
#include <libtracker-extract/tracker-iptc.h>
#define PS3_NAMESPACE "Photoshop 3.0\0"
#define PS3_NAMESPACE_LENGTH 14
#include <libiptcdata/iptc-jpeg.h>
struct tej_error_mgr {
struct jpeg_error_mgr jpeg;
jmp_buf setjmp_buffer;
};
static void
extract_jpeg_error_exit (j_common_ptr cinfo)
{
struct tej_error_mgr *h = (struct tej_error_mgr *) cinfo->err;
(*cinfo->err->output_message)(cinfo);
longjmp (h->setjmp_buffer, 1);
}
/*
* libiptcdata doesn't scan the file until find the IPTC blob.
* We need to find the blob ourselves. This code comes from tracker-extract-jpeg
*/
static TrackerIptcData *
load_iptc_blob (const gchar *filename)
{
struct jpeg_decompress_struct cinfo;
struct tej_error_mgr tejerr;
struct jpeg_marker_struct *marker;
TrackerIptcData *id = NULL;
FILE *f;
gchar *uri;
GFile *file;
file = g_file_new_for_path (filename);
uri = g_file_get_uri (file);
g_object_unref (file);
f = fopen (filename, "r");
cinfo.err = jpeg_std_error (&tejerr.jpeg);
tejerr.jpeg.error_exit = extract_jpeg_error_exit;
if (setjmp (tejerr.setjmp_buffer)) {
fclose (f);
g_free (uri);
return NULL;
}
jpeg_create_decompress (&cinfo);
jpeg_save_markers (&cinfo, JPEG_COM, 0xFFFF);
jpeg_save_markers (&cinfo, JPEG_APP0 + 1, 0xFFFF);
jpeg_save_markers (&cinfo, JPEG_APP0 + 13, 0xFFFF);
jpeg_stdio_src (&cinfo, f);
jpeg_read_header (&cinfo, TRUE);
marker = (struct jpeg_marker_struct *) &cinfo.marker_list;
while (marker) {
gchar *str;
gsize len;
gint offset;
guint sublen;
switch (marker->marker) {
case JPEG_COM:
break;
case JPEG_APP0 + 1:
break;
case JPEG_APP0 + 13:
str = (gchar*) marker->data;
len = marker->data_length;
if (len > 0 && strncmp (PS3_NAMESPACE, str, PS3_NAMESPACE_LENGTH) == 0) {
offset = iptc_jpeg_ps3_find_iptc ((guchar *)str, len, &sublen);
if (offset > 0 && sublen > 0) {
id = tracker_iptc_new ((const guchar *)str + offset, sublen, uri);
}
}
break;
default:
marker = marker->next;
continue;
}
marker = marker->next;
}
g_free (uri);
fclose (f);
return id;
}
static void
test_iptc_extraction (void)
{
TrackerIptcData *data;
data = load_iptc_blob (TOP_SRCDIR "/tests/libtracker-extract/iptc-img.jpg");
g_assert (data);
g_assert_cmpstr (data->keywords, ==, "Coverage, test");
g_assert (g_str_has_prefix (data->date_created, "2011-10-22"));
g_assert_cmpstr (data->byline, ==, "BylineValue");
g_assert_cmpstr (data->byline_title, ==, "BylineTitleValue");
g_assert_cmpstr (data->credit, ==, "CreditValue");
g_assert_cmpstr (data->copyright_notice, ==, "IptcToolAuthors");
g_assert_cmpstr (data->image_orientation, ==, "nfo:orientation-left");
g_assert_cmpstr (data->city, ==, "Helsinki");
g_assert_cmpstr (data->state, ==, "N/A");
g_assert_cmpstr (data->sublocation, ==, "Ruoholahti");
g_assert_cmpstr (data->country_name, ==, "Finland");
g_assert_cmpstr (data->contact, ==, "Dilbert");
tracker_iptc_free (data);
}
int
main (int argc, char **argv)
{
g_test_init (&argc, &argv, NULL);
g_test_add_func ("/libtracker-extract/iptc/extraction",
test_iptc_extraction);
return g_test_run ();
}
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