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MovieMetaData.cs
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MovieMetaData.cs
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using System;
using com.flagstone.transform.coder;
/*
* MetaData.java
* Transform
*
* Copyright (c) 2009-2010 Flagstone Software Ltd. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of Flagstone Software Ltd. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
namespace com.flagstone.transform
{
/// <summary>
/// MetaData is used to add a user-defined information into a Flash file. The
/// information uses the Resource Description Format (RDF) and is compliant
/// with Adobe's Extensible Metadata Platform, see
/// http://www.adobe.com/products/xmp.
/// </summary>
public sealed class MovieMetaData : MovieTag
{
/// <summary>
/// Format string used in toString() method. </summary>
private const string FORMAT = "MetaData: { metadata=%s}";
/// <summary>
/// The meta-data for the movie. </summary>
private string metaData;
/// <summary>
/// The length of the object, minus the header, when it is encoded. </summary>
private int length;
/// <summary>
/// Creates and initialises a MoveMetaData object using values encoded
/// in the Flash binary format.
/// </summary>
/// <param name="coder">
/// an SWFDecoder object that contains the encoded Flash data.
/// </param>
/// <exception cref="IOException">
/// if an error occurs while decoding the data. </exception>
public MovieMetaData(SWFDecoder coder)
{
length = coder.readUnsignedShort() & Coder.LENGTH_FIELD;
if (length == Coder.IS_EXTENDED)
{
length = coder.readInt();
}
coder.mark();
metaData = coder.readString(length - 1);
coder.readByte();
coder.check(length);
coder.unmark();
}
/// <summary>
/// Creates a MoveMetaData object with the specified string containing the
/// meta-data for the movie.
/// </summary>
/// <param name="aString">
/// an arbitrary string containing the meta-data. Must not be
/// null. </param>
public MovieMetaData(string aString)
{
MetaData = aString;
}
/// <summary>
/// Creates and initialises a MovieMetaData object using the values copied
/// from another MovieMetaData object.
/// </summary>
/// <param name="object">
/// a MovieMetaData object from which the values will be
/// copied. </param>
public MovieMetaData(MovieMetaData @object)
{
metaData = @object.metaData;
}
/// <summary>
/// Get the meta-data for the movie.
/// </summary>
/// <returns> the string containing the meta-data. </returns>
public string MetaData
{
get => metaData;
set
{
if (ReferenceEquals(value, null))
{
throw new ArgumentException();
}
metaData = value;
}
}
/// <summary>
/// {@inheritDoc} </summary>
public MovieMetaData copy()
{
return new MovieMetaData(this);
}
public override string ToString()
{
return ObjectExtensions.FormatJava(FORMAT, metaData);
}
/// <summary>
/// {@inheritDoc} </summary>
public int prepareToEncode(Context context)
{
length = context.strlen(metaData);
return (length > Coder.HEADER_LIMIT ? Coder.LONG_HEADER : Coder.SHORT_HEADER) + length;
}
/// <summary>
/// {@inheritDoc} </summary>
public void encode(SWFEncoder coder, Context context)
{
if (length > Coder.HEADER_LIMIT)
{
coder.writeShort((MovieTypes.METADATA << Coder.LENGTH_FIELD_SIZE) | Coder.IS_EXTENDED);
coder.writeInt(length);
}
else
{
coder.writeShort((MovieTypes.METADATA << Coder.LENGTH_FIELD_SIZE) | length);
}
coder.writeString(metaData);
}
}
}