public static void Compress(Stream source, Stream target, SwfFormat compressionFormat)
{
var reader = new SwfStreamReader(source);
var outputWriter = new SwfStreamWriter(target);
var fileInfo = reader.ReadSwfFileInfo();
var rest = reader.ReadRest();
if (fileInfo.Format != SwfFormat.FWS)
{
MemoryStream mem = new MemoryStream();
source.Seek(0, SeekOrigin.Begin);
Decompress(source, mem);
mem.Seek(0, SeekOrigin.Begin);
reader = new SwfStreamReader(mem);
fileInfo = reader.ReadSwfFileInfo();
rest = reader.ReadRest();
}
outputWriter.WriteSwfFileInfo(new SwfFileInfo {
Format = compressionFormat,
FileLength = (uint)(rest.Length) + 8,
Version = fileInfo.Version
});
var compressed = new MemoryStream();
SwfZip.Compress(new MemoryStream(rest), compressed, compressionFormat);
outputWriter.WriteBytes(compressed.ToArray());
outputWriter.Flush();
}
public static void Decompress(Stream source, Stream target)
{
var reader = new SwfStreamReader(source);
var outputWriter = new SwfStreamWriter(target);
var fileInfo = reader.ReadSwfFileInfo();
if (fileInfo.Format == SwfFormat.Unknown)
{
throw new NotSupportedException("Illegal file format");
}
var rest = reader.ReadRest();
if (fileInfo.Format == SwfFormat.FWS)
{
outputWriter.WriteSwfFileInfo(fileInfo);
outputWriter.WriteBytes(rest);
return;
}
var uncompressed = new MemoryStream();
SwfZip.Decompress(new MemoryStream(rest), uncompressed, fileInfo.Format);
outputWriter.WriteSwfFileInfo(new SwfFileInfo {
Format = SwfFormat.FWS,
FileLength = (uint)(uncompressed.Length + 8),
Version = fileInfo.Version
});
outputWriter.WriteBytes(uncompressed.ToArray());
outputWriter.Flush();
}
public static ISwfStreamReader GetSwfStreamReader(SwfFileInfo info, Stream stream)
{
if (info.Format == SwfFormat.FWS)
{
return(new SwfStreamReader(stream));
}
MemoryStream memoryStream = new MemoryStream();
SwfZip.Decompress(stream, memoryStream, info.Format);
return(new SwfStreamReader(memoryStream));
}