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authorSilvio <s1lv10@uol.com.br>2010-04-26 12:35:47 -0300
committerSilvio <s1lv10@uol.com.br>2010-04-26 12:35:47 -0300
commit4ad6d1ad64e70691e83142ba98b79647d96caba4 (patch)
treea75cf88ce324fdb064141a5852ee62c7f15b7450 /exif.class.php
parente68a8fa5e39991cdde75d3770a0cd4e0429f3b3d (diff)
downloadexif-4ad6d1ad64e70691e83142ba98b79647d96caba4.tar.gz
exif-4ad6d1ad64e70691e83142ba98b79647d96caba4.tar.bz2
Initial code for XMP data import
Diffstat (limited to 'exif.class.php')
-rw-r--r--exif.class.php124
1 files changed, 113 insertions, 11 deletions
diff --git a/exif.class.php b/exif.class.php
index 967066d..5ff9a52 100644
--- a/exif.class.php
+++ b/exif.class.php
@@ -35,7 +35,7 @@ Class Exif {
* @return array a list of exif tags to read for this image
*/
public function getExifFields($arCckFields=array()) {
- $arSections = array('exif', 'file', 'computed', 'ifd0', 'gps', 'winxp', 'iptc');
+ $arSections = array('exif', 'file', 'computed', 'ifd0', 'gps', 'winxp', 'iptc', 'xmp');
$arExif = array();
foreach ($arCckFields as $field) {
@@ -117,6 +117,111 @@ Class Exif {
}
/**
+ * Read XMP data from an image file.
+ *
+ * @param $file
+ * File path.
+ *
+ * @param $arTagNames
+ * Available metadata fields.
+ *
+ * @return
+ * XMP image metadata.
+ *
+ * @todo
+ * Support for different array keys.
+ */
+ public function readXMPTags($file, $arTagNames=array()) {
+ // Get a CCK-XMP mapping.
+ $map = $this->getXMPFields();
+ $xmp = $this->openXMP($file);
+
+ // Iterate over XMP fields defined by CCK.
+ foreach ($arTagNames as $tagName) {
+ if ($tagName['section'] == "xmp") {
+ // Get XMP field.
+ $config = $map[$tagName['tag']];
+ $field = $this->readXMPItem($xmp, $config);
+ $info[$tagName['section'] .'_'. $tagName['tag']] = $field;
+ }
+ }
+
+ $this->closeXMP($xmp);
+ return $info;
+ }
+
+ /**
+ * Open an image file for XMP data extraction.
+ *
+ * @param $file
+ * File path.
+ *
+ * @return
+ * Array with XMP file and metadata.
+ */
+ function openXMP($file) {
+ // Setup
+ $xmpfiles = new SXMPFiles();
+ $xmpmeta = new SXMPMeta();
+
+ // Open
+ $xmpfiles->OpenFile($file);
+ $xmpfiles->GetXMP($xmpmeta);
+
+ return array('files' => $xmpfiles, 'meta' => $xmpmeta);
+ }
+
+ /**
+ * Close a file opened for XMP data extraction.
+ *
+ * @param $xmp
+ * XMP array as returned from openXMP().
+ */
+ function closeXMP($xmp) {
+ $xmp['files']->CloseFile();
+ }
+
+ /**
+ * Read a single item from an image file.
+ *
+ * @param $xmp
+ * XMP array as returned from openXMP().
+ *
+ * @param $config
+ * XMP field configuration.
+ *
+ * @param $key
+ * In case of array field type, the numeric field key.
+ *
+ * @return
+ * Field value.
+ */
+ public function readXMPItem($xmp, $config, $key = 0) {
+ // Setup.
+ $xmpfiles = $xmp['files'];
+ $xmpmeta = $xmp['meta'];
+
+ // Sort.
+ $xmpmeta->Sort();
+
+ // Get namespace.
+ $ns = $xmpmeta->GetNamespaceURI($config['ns']);
+
+ // Read XMP data.
+ if ($config['type'] == 'property') {
+ $value = $xmpmeta->GetProperty($config['name'], $ns);
+ }
+ elseif ($config['type' == 'array') {
+ $value = $xmpmeta->GetArrayItem($config['name', $key, $ns);
+ }
+ elseif ($config['type'] == 'struct') {
+ $value = $xmpmeta->GetStructField($ns, $config['struct'], $ns, $config['name']);
+ }
+
+ return $value;
+ }
+
+ /**
* Just some little helper function to get the iptc fields
* @return array
*
@@ -184,17 +289,17 @@ Class Exif {
}
/**
- * WMP fields mapper. As we're dealing with a mapper between RDF
+ * XMP fields mapper. As we're dealing with a mapper between RDF
* elements and CCK fields, we have to define custom keys that
* both on the field name and the namespace used.
*
- * And, as the WMP specs also defines some datatypes like properties,
+ * And, as the XMP specs also defines some datatypes like properties,
* arrays and structures, we have to deal with those as well.
*
* @return array
- * Mapping between CCK and WMP fields.
+ * Mapping between CCK and XMP fields.
*/
- public function getWMPFields() {
+ public function getXMPFields() {
return array(
'headline' => array(
'name' => 'Headline',
@@ -235,16 +340,19 @@ Class Exif {
'name' => 'CiAdrExtadr',
'ns' => 'Iptc4XmpCore',
'type' => 'struct',
+ 'struct' => 'CreatorContactInfo',
),
'ciemailwork' => array(
'name' => 'CiEmailWork',
'ns' => 'Iptc4XmpCore',
'type' => 'struct',
+ 'struct' => 'CreatorContactInfo',
),
'ciurlwork' => array(
'name' => 'CiUrlWork',
'ns' => 'Iptc4XmpCore',
'type' => 'struct',
+ 'struct' => 'CreatorContactInfo',
),
'scene' => array(
'name' => 'Scene',
@@ -263,10 +371,4 @@ Class Exif {
),
);
}
-
- /**
- * Read WMP data from an image file.
- */
- public function readWMPTags($file, $arTagNames=array()) {
- }
}