/*
* GQView
- * (C) 2005 John Ellis
+ * (C) 2006 John Ellis
*
* Authors:
* Original version 2005 Lars Ellenberg, base on dcraw by David coffin.
const guint magic_offset;
const void *magic_pattern;
const guint magic_length;
+ const FormatRawExifType exif_type;
+ FormatRawExifParseFunc exif_func;
const gchar *description;
FormatRawParseFunc func_parse;
};
static FormatRawEntry format_raw_list[] = {
+#if DEBUG_RAW_TIFF
+ FORMAT_RAW_DEBUG_TIFF,
+#endif
FORMAT_RAW_CANON,
FORMAT_RAW_FUJI,
FORMAT_RAW_NIKON,
- { NULL, 0, 0, NULL, 0, NULL, NULL }
+ FORMAT_RAW_OLYMPUS,
+ FORMAT_RAW_PENTAX,
+ { NULL, 0, 0, NULL, 0, 0, NULL, NULL, NULL }
};
}
+FormatRawExifType format_raw_exif_offset(unsigned char *data, const guint len, guint *exif_offset,
+ FormatRawExifParseFunc *exif_parse_func)
+{
+ FormatRawEntry *entry;
+
+ if (!data || len < 1) return FALSE;
+
+ entry = format_raw_find(data, len);
+
+ if (!entry || !entry->func_parse) return FALSE;
+
+ if (!format_raw_parse(entry, data, len, NULL, exif_offset)) return FORMAT_RAW_EXIF_NONE;
+
+ if (entry->exif_type == FORMAT_RAW_EXIF_PROPRIETARY && exif_parse_func)
+ {
+ *exif_parse_func = entry->exif_func;
+ }
+
+ return entry->exif_type;
+}
+
+
gint format_raw_img_exif_offsets_fd(int fd, const gchar *path,
unsigned char *header_data, const guint header_len,
guint *image_offset, guint *exif_offset)
return entry->func_parse(exif, tiff, offset, size, bo);
}
+/*
+ *-----------------------------------------------------------------------------
+ * Basic TIFF debugger, prints all IFD entries within tiff file
+ *-----------------------------------------------------------------------------
+ */
+#if DEBUG_RAW_TIFF
+
+static guint format_debug_tiff_table(unsigned char *data, const guint len, guint offset,
+ ExifByteOrder bo, gint level);
+
+static void format_debug_tiff_entry(unsigned char *data, const guint len, guint offset,
+ ExifByteOrder bo, gint level)
+{
+ guint tag;
+ guint type;
+ guint count;
+ guint segment;
+ guint seg_len;
+
+ tag = exif_byte_get_int16(data + offset + EXIF_TIFD_OFFSET_TAG, bo);
+ type = exif_byte_get_int16(data + offset + EXIF_TIFD_OFFSET_FORMAT, bo);
+ count = exif_byte_get_int32(data + offset + EXIF_TIFD_OFFSET_COUNT, bo);
+
+ seg_len = ExifFormatList[type].size * count;
+ if (seg_len > 4)
+ {
+ segment = exif_byte_get_int32(data + offset + EXIF_TIFD_OFFSET_DATA, bo);
+ if (segment + seg_len > len) return;
+ }
+ else
+ {
+ segment = offset + EXIF_TIFD_OFFSET_DATA;
+ }
+
+ printf("%*stag:0x%04X (%05d), type:%2d %9s, len:%6d [%02X %02X %02X %02X] @ offset:%d\n",
+ level, "", tag, tag, type,
+ (type < EXIF_FORMAT_COUNT) ? ExifFormatList[type].short_name : "???", count,
+ data[segment], data[segment + 1], data[segment + 2], data[segment + 3], segment);
+
+ if (tag == 0x8769 || tag == 0x14a)
+ {
+ gint i;
+
+ printf("%*s~~~ found %s table\n", level, "", (tag == 0x14a) ? "subIFD" : "EXIF" );
+
+ for (i = 0; i < count; i++)
+ {
+ guint subset;
+
+ subset = exif_byte_get_int32(data + segment + i * 4, bo);
+ format_debug_tiff_table(data, len, subset, bo, level + 1);
+ }
+ }
+ else if (tag == 0x201 && (type == EXIF_FORMAT_LONG_UNSIGNED || type == EXIF_FORMAT_LONG))
+ {
+ guint subset = exif_byte_get_int32(data + segment, bo);
+ printf("%*s~~~ found jpeg data at offset %d\n", level, "", subset);
+ }
+ else if (tag == 0x202 && (type == EXIF_FORMAT_LONG_UNSIGNED || type == EXIF_FORMAT_LONG))
+ {
+ guint subset = exif_byte_get_int32(data + segment, bo);
+ printf("%*s~~~ found jpeg data length of %d\n", level, "", subset);
+ }
+}
+
+static guint format_debug_tiff_table(unsigned char *data, const guint len, guint offset,
+ ExifByteOrder bo, gint level)
+{
+ guint count;
+ guint i;
+
+ if (level > EXIF_TIFF_MAX_LEVELS) return 0;
+
+ if (len < offset + 2) return FALSE;
+
+ count = exif_byte_get_int16(data + offset, bo);
+ offset += 2;
+ if (len < offset + count * EXIF_TIFD_SIZE + 4) return 0;
+
+ printf("%*s== tiff table #%d has %d entries ==\n", level, "", level, count);
+
+ for (i = 0; i < count; i++)
+ {
+ format_debug_tiff_entry(data, len, offset + i * EXIF_TIFD_SIZE, bo, level);
+ }
+
+ printf("%*s----------- end of #%d ------------\n", level, "", level);
+
+ return exif_byte_get_int32(data + offset + count * EXIF_TIFD_SIZE, bo);
+}
+
+gint format_debug_tiff_raw(unsigned char *data, const guint len,
+ guint *image_offset, guint *exif_offset)
+{
+ ExifByteOrder bo;
+ gint level;
+ guint offset;
+
+ if (len < 8) return FALSE;
+
+ /* for debugging, we are more relaxed as to magic header */
+ if (memcmp(data, "II", 2) == 0)
+ {
+ bo = EXIF_BYTE_ORDER_INTEL;
+ }
+ else if (memcmp(data, "MM", 2) == 0)
+ {
+ bo = EXIF_BYTE_ORDER_MOTOROLA;
+ }
+ else
+ {
+ return FALSE;
+ }
+
+ printf("*** debug parsing tiff\n");
+
+ offset = exif_byte_get_int32(data + 4, bo);
+ level = 0;
+ while (offset && level < EXIF_TIFF_MAX_LEVELS)
+ {
+ offset = format_debug_tiff_table(data, len, offset, bo, 0);
+ level++;
+ }
+
+ printf("*** end\n");
+
+ /* we are debugging, not trying to return any data */
+ return FALSE;
+}
+#endif
+
projects / geeqie.git / blobdiff