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Commit 72fd2b12 authored by Dichen Zhang's avatar Dichen Zhang
Browse files

Generate xml 

Bug: b/252835416
Test: use sample code in ag/20349112, output xmp metadata should be identical to the sample

Change-Id: I1fa8d40c3fab1a8e3ebe70db42582d632bcdb7d5
parent 8add42b2

libs/jpegrecoverymap/Android.bp

+2 −1
Original line number Diff line number Diff line
@@ -23,7 +23,7 @@ package { 


cc_library_static {

    name: "libjpegrecoverymap",

    vendor_available: true,

    host_supported: true,



    export_include_dirs: ["include"],

    local_include_dirs: ["include"],
@@ -33,6 +33,7 @@ cc_library_static { 
    ],



    shared_libs: [

        "libimage_io",

        "libutils",

    ],

}

libs/jpegrecoverymap/include/jpegrecoverymap/recoverymap.h

+41 −0
Original line number Diff line number Diff line
@@ -168,6 +168,47 @@ private: 
    status_t appendRecoveryMap(void* compressed_jpeg_image,

                               jr_compressed_ptr compressed_recovery_map,

                               void* dest);



    /*

     * This method generates XMP metadata.

     *

     * below is an example of the XMP metadata that this function generates where

     * secondary_image_length = 1000

     * hdr_ratio = 1.25

     *

     * <x:xmpmeta

     *   xmlns:x="adobe:ns:meta/"

     *   x:xmptk="Adobe XMP Core 5.1.2">

     *   <rdf:RDF

     *     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">

     *     <rdf:Description

     *       xmlns:GContainer="http://ns.google.com/photos/1.0/container/">

     *       <GContainer:Version>1</GContainer:Version>

     *       <GContainer:HdrRatio>1.25</GContainer:HdrRatio>

     *       <GContainer:Directory>

     *         <rdf:Seq>

     *           <rdf:li>

     *             <GContainer:Item

     *               Item:Semantic="Primary"

     *               Item:Mime="image/jpeg"/>

     *           </rdf:li>

     *           <rdf:li>

     *             <GContainer:Item

     *               Item:Semantic="RecoveryMap"

     *               Item:Mime="image/jpeg"

     *               Item:Length="1000"/>

     *           </rdf:li>

     *         </rdf:Seq>

     *       </GContainer:Directory>

     *     </rdf:Description>

     *   </rdf:RDF>

     * </x:xmpmeta>

     *

     * @param secondary_image_length length of secondary image

     * @param hdr_ratio hdr ratio

     * @return XMP metadata in type of string

     */

    std::string generateXmp(int secondary_image_length, float hdr_ratio);

};



} // namespace android::recoverymap

libs/jpegrecoverymap/recoverymap.cpp

+68 −0
Original line number Diff line number Diff line
@@ -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 @@ status_t RecoveryMap::appendRecoveryMap(void* compressed_jpeg_image, 
  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