Generate xml
Bug: b/252835416
Test: use sample code in ag/20349112, output xmp metadata should be identical to the sample
Change-Id: I1fa8d40c3fab1a8e3ebe70db42582d632bcdb7d5
diff --git a/libs/jpegrecoverymap/recoverymap.cpp b/libs/jpegrecoverymap/recoverymap.cpp
index 5d25722..8d3cd00 100644
--- a/libs/jpegrecoverymap/recoverymap.cpp
+++ b/libs/jpegrecoverymap/recoverymap.cpp
@@ -14,10 +14,29 @@
* limitations under the License.
*/
+#include "image_io/xml/xml_writer.h"
+
#include <jpegrecoverymap/recoverymap.h>
+#include <sstream>
+#include <string>
+
+using namespace std;
namespace android::recoverymap {
+/*
+ * Helper function used for generating XMP metadata.
+ *
+ * @param prefix The prefix part of the name.
+ * @param suffix The suffix part of the name.
+ * @return A name of the form "prefix:suffix".
+ */
+string Name(const string &prefix, const string &suffix) {
+ std::stringstream ss;
+ ss << prefix << ":" << suffix;
+ return ss.str();
+}
+
status_t RecoveryMap::encodeJPEGR(jr_uncompressed_ptr uncompressed_p010_image,
jr_uncompressed_ptr uncompressed_yuv_420_image,
void* dest) {
@@ -137,4 +156,53 @@
return NO_ERROR;
}
+string RecoveryMap::generateXmp(int secondary_image_length, float hdr_ratio) {
+ const string kContainerPrefix = "GContainer";
+ const string kContainerUri = "http://ns.google.com/photos/1.0/container/";
+ const string kItemPrefix = "Item";
+ const string kRecoveryMap = "RecoveryMap";
+ const string kDirectory = "Directory";
+ const string kImageJpeg = "image/jpeg";
+ const string kItem = "Item";
+ const string kLength = "Length";
+ const string kMime = "Mime";
+ const string kPrimary = "Primary";
+ const string kSemantic = "Semantic";
+ const string kVersion = "Version";
+ const int kVersionValue = 1;
+
+ const string kConDir = Name(kContainerPrefix, kDirectory);
+ const string kContainerItem = Name(kContainerPrefix, kItem);
+ const string kItemLength = Name(kItemPrefix, kLength);
+ const string kItemMime = Name(kItemPrefix, kMime);
+ const string kItemSemantic = Name(kItemPrefix, kSemantic);
+
+ const vector<string> kConDirSeq({kConDir, string("rdf:Seq")});
+ const vector<string> kLiItem({string("rdf:li"), kContainerItem});
+
+ std::stringstream ss;
+ photos_editing_formats::image_io::XmlWriter writer(ss);
+ writer.StartWritingElement("x:xmpmeta");
+ writer.WriteXmlns("x", "adobe:ns:meta/");
+ writer.WriteAttributeNameAndValue("x:xmptk", "Adobe XMP Core 5.1.2");
+ writer.StartWritingElement("rdf:RDF");
+ writer.WriteXmlns("rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
+ writer.StartWritingElement("rdf:Description");
+ writer.WriteXmlns(kContainerPrefix, kContainerUri);
+ writer.WriteElementAndContent(Name(kContainerPrefix, kVersion), kVersionValue);
+ writer.WriteElementAndContent(Name(kContainerPrefix, "HdrRatio"), hdr_ratio);
+ writer.StartWritingElements(kConDirSeq);
+ size_t item_depth = writer.StartWritingElements(kLiItem);
+ writer.WriteAttributeNameAndValue(kItemSemantic, kPrimary);
+ writer.WriteAttributeNameAndValue(kItemMime, kImageJpeg);
+ writer.FinishWritingElementsToDepth(item_depth);
+ writer.StartWritingElements(kLiItem);
+ writer.WriteAttributeNameAndValue(kItemSemantic, kRecoveryMap);
+ writer.WriteAttributeNameAndValue(kItemMime, kImageJpeg);
+ writer.WriteAttributeNameAndValue(kItemLength, secondary_image_length);
+ writer.FinishWriting();
+
+ return ss.str();
+}
+
} // namespace android::recoverymap