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/* exif-mnote-data-pentax.c
*
* Copyright (c) 2002, 2003 Lutz Mueller <lutz@users.sourceforge.net>
*
* 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 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "exif-mnote-data-pentax.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <libexif/exif-byte-order.h>
#include <libexif/exif-utils.h>
/* #define DEBUG */
static void
exif_mnote_data_pentax_clear (ExifMnoteDataPentax *n)
{
ExifMnoteData *d = (ExifMnoteData *) n;
unsigned int i;
if (!n) return;
if (n->entries) {
for (i = 0; i < n->count; i++)
if (n->entries[i].data) {
exif_mem_free (d->mem, n->entries[i].data);
n->entries[i].data = NULL;
}
exif_mem_free (d->mem, n->entries);
n->entries = NULL;
n->count = 0;
}
}
static void
exif_mnote_data_pentax_free (ExifMnoteData *n)
{
if (!n) return;
exif_mnote_data_pentax_clear ((ExifMnoteDataPentax *) n);
}
static char *
exif_mnote_data_pentax_get_value (ExifMnoteData *d, unsigned int i, char *val, unsigned int maxlen)
{
ExifMnoteDataPentax *n = (ExifMnoteDataPentax *) d;
if (!n) return NULL;
if (n->count <= i) return NULL;
return mnote_pentax_entry_get_value (&n->entries[i], val, maxlen);
}
static void
exif_mnote_data_pentax_load (ExifMnoteData *en,
const unsigned char *buf, unsigned int buf_size)
{
ExifMnoteDataPentax *n = (ExifMnoteDataPentax *) en;
size_t i, o, s, datao = 6 + n->offset, base = 0;
ExifShort c;
/* Number of entries */
if (buf_size < datao + (4 + 2) + 2) return;
if (!memcmp(buf + datao, "AOC", 4)) {
if ((buf[datao + 4] == 'I') && (buf[datao + 5] == 'I')) {
n->version = pentaxV3;
n->order = EXIF_BYTE_ORDER_INTEL;
} else if ((buf[datao + 4] == 'M') && (buf[datao + 5] == 'M')) {
n->version = pentaxV3;
n->order = EXIF_BYTE_ORDER_MOTOROLA;
} else {
/* Uses Casio v2 tags */
n->version = pentaxV2;
}
datao += 4 + 2;
base = MNOTE_PENTAX2_TAG_BASE;
} if (!memcmp(buf + datao, "QVC", 4)) {
n->version = casioV2;
base = MNOTE_CASIO2_TAG_BASE;
datao += 4 + 2;
} else {
n->version = pentaxV1;
}
c = exif_get_short (buf + datao, n->order);
n->entries = exif_mem_alloc (en->mem, sizeof (MnotePentaxEntry) * c);
if (!n->entries) return;
for (i = 0; i < c; i++) {
o = datao + 2 + 12 * i;
if (o + 8 > buf_size) return;
n->count = i + 1;
n->entries[i].tag = exif_get_short (buf + o + 0, n->order) + base;
n->entries[i].format = exif_get_short (buf + o + 2, n->order);
n->entries[i].components = exif_get_long (buf + o + 4, n->order);
n->entries[i].order = n->order;
/*
* Size? If bigger than 4 bytes, the actual data is not
* in the entry but somewhere else (offset).
*/
s = exif_format_get_size (n->entries[i].format) *
n->entries[i].components;
if (s > 65536) {
/* Corrupt data: EXIF data size is limited to the
* maximum size of a JPEG segment (64 kb).
*/
continue;
}
if (!s) return;
o += 8;
if (s > 4) o = exif_get_long (buf + o, n->order) + 6;
if (o + s > buf_size) return;
/* Sanity check */
n->entries[i].data = exif_mem_alloc (en->mem, s);
if (!n->entries[i].data) return;
n->entries[i].size = s;
memcpy (n->entries[i].data, buf + o, s);
}
}
static unsigned int
exif_mnote_data_pentax_count (ExifMnoteData *n)
{
return n ? ((ExifMnoteDataPentax *) n)->count : 0;
}
static unsigned int
exif_mnote_data_pentax_get_id (ExifMnoteData *d, unsigned int n)
{
ExifMnoteDataPentax *note = (ExifMnoteDataPentax *) d;
if (!note) return 0;
if (note->count <= n) return 0;
return note->entries[n].tag;
}
static const char *
exif_mnote_data_pentax_get_name (ExifMnoteData *d, unsigned int n)
{
ExifMnoteDataPentax *note = (ExifMnoteDataPentax *) d;
if (!note) return NULL;
if (note->count <= n) return NULL;
return mnote_pentax_tag_get_name (note->entries[n].tag);
}
static const char *
exif_mnote_data_pentax_get_title (ExifMnoteData *d, unsigned int n)
{
ExifMnoteDataPentax *note = (ExifMnoteDataPentax *) d;
if (!note) return NULL;
if (note->count <= n) return NULL;
return mnote_pentax_tag_get_title (note->entries[n].tag);
}
static const char *
exif_mnote_data_pentax_get_description (ExifMnoteData *d, unsigned int n)
{
ExifMnoteDataPentax *note = (ExifMnoteDataPentax *) d;
if (!note) return NULL;
if (note->count <= n) return NULL;
return mnote_pentax_tag_get_description (note->entries[n].tag);
}
static void
exif_mnote_data_pentax_set_offset (ExifMnoteData *d, unsigned int o)
{
if (d) ((ExifMnoteDataPentax *) d)->offset = o;
}
static void
exif_mnote_data_pentax_set_byte_order (ExifMnoteData *d, ExifByteOrder o)
{
ExifByteOrder o_orig;
ExifMnoteDataPentax *n = (ExifMnoteDataPentax *) d;
unsigned int i;
if (!n) return;
o_orig = n->order;
n->order = o;
for (i = 0; i < n->count; i++) {
n->entries[i].order = o;
exif_array_set_byte_order (n->entries[i].format, n->entries[i].data,
n->entries[i].components, o_orig, o);
}
}
ExifMnoteData *
exif_mnote_data_pentax_new (ExifMem *mem)
{
ExifMnoteData *d;
if (!mem) return NULL;
d = exif_mem_alloc (mem, sizeof (ExifMnoteDataPentax));
if (!d) return NULL;
exif_mnote_data_construct (d, mem);
/* Set up function pointers */
d->methods.free = exif_mnote_data_pentax_free;
d->methods.set_byte_order = exif_mnote_data_pentax_set_byte_order;
d->methods.set_offset = exif_mnote_data_pentax_set_offset;
d->methods.load = exif_mnote_data_pentax_load;
d->methods.count = exif_mnote_data_pentax_count;
d->methods.get_id = exif_mnote_data_pentax_get_id;
d->methods.get_name = exif_mnote_data_pentax_get_name;
d->methods.get_title = exif_mnote_data_pentax_get_title;
d->methods.get_description = exif_mnote_data_pentax_get_description;
d->methods.get_value = exif_mnote_data_pentax_get_value;
return d;
}
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