package org.jaudiotagger.audio.asf.io;

 import org.jaudiotagger.audio.asf.data.Chunk;

 import org.jaudiotagger.audio.asf.data.ContentBranding;

 import org.jaudiotagger.audio.asf.data.GUID;

 import org.jaudiotagger.audio.asf.util.Utils;

 import java.io.IOException;

 import java.io.InputStream;

 import java.math.BigInteger;

 /**

  * This reader is used to read the content branding object of ASF streams.<br>

  * @see org.jaudiotagger.audio.asf.data.ContainerType#CONTENT_BRANDING

  * @see ContentBranding

  * 

  * @author Christian Laireiter

  */

 public class ContentBrandingReader implements ChunkReader {

     /**

      * The GUID this reader {@linkplain #getApplyingIds() applies to}

      */

     private final static GUID[] APPLYING = { GUID.GUID_CONTENT_BRANDING };

     /**

      * Should not be used for now.

      */

     protected ContentBrandingReader() {

         // NOTHING toDo

     }

     /**

      * {@inheritDoc}

      */

     public boolean canFail() {

         return false;

     }

     /**

      * {@inheritDoc}

      */

     public GUID[] getApplyingIds() {

         return APPLYING.clone();

     }

     /**

      * {@inheritDoc}

      */

     public Chunk read(final GUID guid, final InputStream stream,

             final long streamPosition) throws IOException {

         assert GUID.GUID_CONTENT_BRANDING.equals(guid);

         final BigInteger chunkSize = Utils.readBig64(stream);

         final long imageType = Utils.readUINT32(stream);

         assert imageType >= 0 && imageType <= 3 : imageType;

         final long imageDataSize = Utils.readUINT32(stream);

         assert imageType > 0 || imageDataSize == 0 : imageDataSize;

         assert imageDataSize < Integer.MAX_VALUE;

         final byte[] imageData = Utils.readBinary(stream, imageDataSize);

         final long copyRightUrlLen = Utils.readUINT32(stream);

         final String copyRight = new String(Utils.readBinary(stream,

                 copyRightUrlLen));

         final long imageUrlLen = Utils.readUINT32(stream);

         final String imageUrl = new String(Utils

                 .readBinary(stream, imageUrlLen));

         final ContentBranding result = new ContentBranding(streamPosition,

                 chunkSize);

         result.setImage(imageType, imageData);

         result.setCopyRightURL(copyRight);

         result.setBannerImageURL(imageUrl);

         return result;

     }

 }