function parseCanon($block, &$result, $seek, $globalOffset)
{
$place = 0;
//current place
if ($result['Endien'] == "Intel") {
$intel = 1;
} else {
$intel = 0;
}
$model = $result['IFD0']['Model'];
//Get number of tags (2 bytes)
$num = bin2hex(substr($block, $place, 2));
$place += 2;
if ($intel == 1) {
$num = intel2Moto($num);
}
$result['SubIFD']['MakerNote']['MakerNoteNumTags'] = hexdec($num);
//loop thru all tags Each field is 12 bytes
for ($i = 0; $i < hexdec($num); $i++) {
//2 byte tag
$tag = bin2hex(substr($block, $place, 2));
$place += 2;
if ($intel == 1) {
$tag = intel2Moto($tag);
}
$tag_name = lookup_Canon_tag($tag);
//2 byte type
$type = bin2hex(substr($block, $place, 2));
$place += 2;
if ($intel == 1) {
$type = intel2Moto($type);
}
lookup_type($type, $size);
//4 byte count of number of data units
$count = bin2hex(substr($block, $place, 4));
$place += 4;
if ($intel == 1) {
$count = intel2Moto($count);
}
$bytesofdata = $size * hexdec($count);
if ($bytesofdata <= 0) {
return;
//if this value is 0 or less then we have read all the tags we can
}
//4 byte value of data or pointer to data
$value = substr($block, $place, 4);
$place += 4;
if ($bytesofdata <= 4) {
$data = $value;
} else {
$value = bin2hex($value);
if ($intel == 1) {
$value = intel2Moto($value);
}
$v = fseek($seek, $globalOffset + hexdec($value));
//offsets are from TIFF header which is 12 bytes from the start of the file
if (isset($GLOBALS['exiferFileSize'])) {
$exiferFileSize = $GLOBALS['exiferFileSize'];
} else {
$exiferFileSize = 0;
}
if ($v == 0 && $bytesofdata < $exiferFileSize) {
$data = fread($seek, $bytesofdata);
} else {
if ($v == -1) {
$result['Errors'] = $result['Errors']++;
$data = '';
} else {
$data = '';
}
}
}
$result['SubIFD']['MakerNote'][$tag_name] = '';
// insure the index exists
$formated_data = formatCanonData($type, $tag, $intel, $data, $result, $result['SubIFD']['MakerNote'][$tag_name]);
if ($result['VerboseOutput'] == 1) {
//$result['SubIFD']['MakerNote'][$tag_name] = $formated_data;
if ($type == "URATIONAL" || $type == "SRATIONAL" || $type == "USHORT" || $type == "SSHORT" || $type == "ULONG" || $type == "SLONG" || $type == "FLOAT" || $type == "DOUBLE") {
$data = bin2hex($data);
if ($intel == 1) {
$data = intel2Moto($data);
}
}
$result['SubIFD']['MakerNote'][$tag_name . "_Verbose"]['RawData'] = $data;
$result['SubIFD']['MakerNote'][$tag_name . "_Verbose"]['Type'] = $type;
$result['SubIFD']['MakerNote'][$tag_name . "_Verbose"]['Bytes'] = $bytesofdata;
} else {
//$result['SubIFD']['MakerNote'][$tag_name] = $formated_data;
}
}
}
function parseCanon($block, &$result, $seek, $globalOffset)
{
global $exiferFileSize;
//Manuel: this makes canon maker notes work
$place = 0;
//current place
if ($result['Endien'] == "Intel") {
$intel = 1;
} else {
$intel = 0;
}
/* Manuel: start determine a possible makernote offset given in the makernote trailer */
$offsetDelta = 0;
//currentOffset of MakerNote starting after TIFF header
$blockLenBytes = strlen(bin2hex($block)) / 2;
$currentOffset = ftell($seek) - $blockLenBytes - $globalOffset;
//get potential trailer 8bytes from end of MakerNote
//first 4 bytes are trailer signature corresponding to TIFF header
$trailerId = bin2hex(substr($block, -8, 4));
if ($intel) {
$tiffHeader = bin2hex('II');
//Intel
// 2 bytes of 0x002a
$tiffHeader .= intel2Moto('002a');
} else {
$tiffHeader = bin2hex('MM');
//Motorola
$tiffHeader .= '002a';
}
if ($trailerId == $tiffHeader) {
//is it the trailer?
//next 4 bytes contain offset value
$mnOffset = bin2hex(substr($block, -4));
if ($intel == 1) {
$mnOffset = intel2Moto($mnOffset);
}
//calculate the delta
$offsetDelta = $currentOffset - hexdec($mnOffset);
}
/* Manuel: end determine makernote offset */
$model = $result['IFD0']['Model'];
//Get number of tags (2 bytes)
$num = bin2hex(substr($block, $place, 2));
$place += 2;
if ($intel == 1) {
$num = intel2Moto($num);
}
$result['SubIFD']['MakerNote']['MakerNoteNumTags'] = hexdec($num);
//loop thru all tags Each field is 12 bytes
for ($i = 0; $i < hexdec($num); $i++) {
//2 byte tag
$tag = bin2hex(substr($block, $place, 2));
$place += 2;
if ($intel == 1) {
$tag = intel2Moto($tag);
}
$tag_name = lookup_Canon_tag($tag);
//2 byte type
$type = bin2hex(substr($block, $place, 2));
$place += 2;
if ($intel == 1) {
$type = intel2Moto($type);
}
lookup_type($type, $size);
//4 byte count of number of data units
$count = bin2hex(substr($block, $place, 4));
$place += 4;
if ($intel == 1) {
$count = intel2Moto($count);
}
$bytesofdata = $size * hexdec($count);
if ($bytesofdata <= 0) {
return;
//if this value is 0 or less then we have read all the tags we can
}
//4 byte value of data or pointer to data
$value = substr($block, $place, 4);
$place += 4;
if ($bytesofdata <= 4) {
$data = $value;
} else {
$value = bin2hex($value);
if ($intel == 1) {
$value = intel2Moto($value);
}
//offsets are from TIFF header which is 12 bytes from the start of the file
//Manuel: also account for $offsetDelta given by the makernote offset in TIFF trailer
$v = fseek($seek, $globalOffset + hexdec($value) + $offsetDelta);
if ($v == 0 && $bytesofdata < $exiferFileSize) {
//Manuel: this makes canon maker notes work
$data = fread($seek, $bytesofdata);
} else {
if ($v == -1) {
$result['Errors'] = $result['Errors']++;
}
}
}
$formated_data = formatCanonData($type, $tag, $intel, $data, $result, $result['SubIFD']['MakerNote'][$tag_name]);
if ($result['VerboseOutput'] == 1) {
//$result['SubIFD']['MakerNote'][$tag_name] = $formated_data;
if ($type == "URATIONAL" || $type == "SRATIONAL" || $type == "USHORT" || $type == "SSHORT" || $type == "ULONG" || $type == "SLONG" || $type == "FLOAT" || $type == "DOUBLE") {
$data = bin2hex($data);
if ($intel == 1) {
$data = intel2Moto($data);
}
}
$result['SubIFD']['MakerNote'][$tag_name . "_Verbose"]['RawData'] = $data;
$result['SubIFD']['MakerNote'][$tag_name . "_Verbose"]['Type'] = $type;
$result['SubIFD']['MakerNote'][$tag_name . "_Verbose"]['Bytes'] = $bytesofdata;
} else {
//$result['SubIFD']['MakerNote'][$tag_name] = $formated_data;
}
}
}
