void
jpeg_data_dump (JPEGData *data)
{
unsigned int i;
JPEGContent content;
JPEGMarker marker;
if (!data)
return;
printf ("Dumping JPEG data (%i bytes of data)...\n", data->size);
for (i = 0; i < data->count; i++) {
marker = data->sections[i].marker;
content = data->sections[i].content;
printf ("Section %i (marker 0x%x - %s):\n", i, marker,
jpeg_marker_get_name (marker));
printf (" Description: %s\n",
jpeg_marker_get_description (marker));
switch (marker) {
case JPEG_MARKER_SOI:
case JPEG_MARKER_EOI:
break;
case JPEG_MARKER_APP1:
exif_data_dump (content.app1);
break;
default:
printf (" Size: %i\n", content.generic.size);
printf (" Unknown content.\n");
break;
}
}
}
void
jpeg_data_load_data (JPEGData *data, const unsigned char *d,
unsigned int size)
{
unsigned int i, o, len;
JPEGSection *s;
JPEGMarker marker;
if (!data)
return;
if (!d)
return;
#ifdef DEBUG
printf ("Parsing %i bytes...\n", size);
#endif
for (o = 0; o < size;) {
/*
* JPEG sections start with 0xff. The first byte that is
* not 0xff is a marker (hopefully).
*/
for (i = 0; i < 7; i++)
if (d[o + i] != 0xff)
break;
if (!JPEG_IS_MARKER (d[o + i]))
return;
marker = d[o + i];
#ifdef DEBUG
printf ("Found marker 0x%x ('%s') at %i.\n", marker,
jpeg_marker_get_name (marker), o + i);
#endif
/* Append this section */
jpeg_data_append_section (data);
s = &data->sections[data->count - 1];
s->marker = marker;
s->content.generic.data = NULL;
o += i + 1;
switch (s->marker) {
case JPEG_MARKER_SOI:
case JPEG_MARKER_EOI:
break;
default:
/* Read the length of the section */
len = ((d[o] << 8) | d[o + 1]) - 2;
if (len > size) { o = size; break; }
o += 2;
if (o + len > size) { o = size; break; }
switch (s->marker) {
case JPEG_MARKER_APP1:
s->content.app1 = exif_data_new_from_data (
d + o - 4, len + 4);
break;
default:
s->content.generic.size = len;
s->content.generic.data =
malloc (sizeof (char) * len);
memcpy (s->content.generic.data, &d[o], len);
/* In case of SOS, image data will follow. */
if (s->marker == JPEG_MARKER_SOS) {
data->size = size - 2 - o - len;
data->data = malloc (
sizeof (char) * data->size);
memcpy (data->data, d + o + len,
data->size);
o += data->size;
}
break;
}
o += len;
break;
}
}
}
