1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/*
* Copyright (C) 2005 Christophe Fergeau
*
*
* The code contained in this file 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 file 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 code; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* iTunes and iPod are trademarks of Apple
*
* This product is not supported/written/published by Apple!
*
*/
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <glib.h>
#include <glib-object.h>
#include "db-artwork-parser.h"
#include "db-image-parser.h"
static unsigned char *
unpack_RGB_565 (gushort *pixels, unsigned int bytes_len)
{
unsigned char *result;
unsigned int i;
result = g_malloc ((bytes_len/2) * 3);
if (result == NULL) {
return NULL;
}
for (i = 0; i < bytes_len/2; i++) {
gushort cur_pixel;
cur_pixel = GINT16_FROM_LE (pixels[i]);
/* Unpack pixels */
result[3*i] = (pixels[i] & RED_MASK) >> RED_SHIFT;
result[3*i+1] = (pixels[i] & GREEN_MASK) >> GREEN_SHIFT;
result[3*i+2] = (pixels[i] & BLUE_MASK) >> BLUE_SHIFT;
/* Normalize color values so that they use a [0..255] range */
result[3*i] <<= (8 - RED_BITS);
result[3*i+1] <<= (8 - GREEN_BITS);
result[3*i+2] <<= (8 - BLUE_BITS);
}
return result;
}
static unsigned char *
get_pixel_data (Itdb_Image *image)
{
unsigned char *result;
FILE *f;
int res;
f = NULL;
result = g_malloc (image->size);
if (result == NULL) {
return NULL;
}
f = fopen (image->filename, "r");
if (f == NULL) {
g_print ("Failed to open %s: %s\n",
image->filename, strerror (errno));
goto end;
}
res = fseek (f, image->offset, SEEK_SET);
if (res != 0) {
g_print ("Seek to %d failed on %s: %s\n",
image->offset, image->filename, strerror (errno));
goto end;
}
res = fread (result, image->size, 1, f);
if (res != 1) {
g_print ("Failed to read %u bytes from %s: %s\n",
image->size, image->filename, strerror (errno));
goto end;
}
fclose (f);
return result;
end:
if (f != NULL) {
fclose (f);
}
g_free (result);
return NULL;
}
unsigned char *
itdb_image_get_rgb_data (Itdb_Image *image)
{
void *pixels565;
void *pixels;
pixels565 = get_pixel_data (image);
if (pixels565 == NULL) {
return NULL;
}
pixels = unpack_RGB_565 (pixels565, image->size);
g_free (pixels565);
return pixels;
/* return gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, FALSE,
8, image->width, image->height,
image->width * 3,
(GdkPixbufDestroyNotify)g_free,
NULL);
*/
}
G_GNUC_INTERNAL char *
ipod_image_get_ithmb_filename (const char *mount_point, gint correlation_id)
{
char *paths[] = {"iPod_Control", "Artwork", NULL, NULL};
char *filename;
paths[2] = g_strdup_printf ("F%04u_1.ithmb", correlation_id);
filename = itdb_resolve_path (mount_point, (const char **)paths);
g_free (paths[2]);
return filename;
}
G_GNUC_INTERNAL Itdb_Image *
ipod_image_new_from_mhni (MhniHeader *mhni, const char *mount_point)
{
Itdb_Image *img;
img = g_new0 (Itdb_Image, 1);
if (img == NULL) {
return NULL;
}
img->filename = ipod_image_get_ithmb_filename (mount_point,
GINT_FROM_LE (mhni->correlation_id));
img->size = GUINT32_FROM_LE (mhni->image_size);
img->offset = GUINT32_FROM_LE (mhni->ithmb_offset);
img->width = GINT16_FROM_LE (mhni->image_width);
img->height = GINT16_FROM_LE (mhni->image_height);
switch (mhni->correlation_id) {
case IPOD_THUMBNAIL_FULL_SIZE_CORRELATION_ID:
case IPOD_NANO_THUMBNAIL_FULL_SIZE_CORRELATION_ID:
img->type = ITDB_IMAGE_FULL_SCREEN;
break;
case IPOD_THUMBNAIL_NOW_PLAYING_CORRELATION_ID:
case IPOD_NANO_THUMBNAIL_NOW_PLAYING_CORRELATION_ID:
img->type = ITDB_IMAGE_NOW_PLAYING;
break;
default:
g_print ("Unrecognized image size: %ux%u\n",
img->width, img->height);
g_free (img);
return NULL;
}
return img;
}
|
