private bool ReadHeader()
{
// Read file signature
this.signature = Encoding.ASCII.GetString(this.swf.ReadUI8(3)); // "FWS" or "CWS" for ZLIB compressed (v6.0 or later)
if (this.signature != "FWS" &&
this.signature != "CWS")
{
Trace.WriteLine("Not a valid SWF (Flash) file signature");
return(false);
}
TraceManager.Add(String.Format("Signature : {0}", this.Signature));
// Read file version
this.version = this.swf.ReadUI8();
TraceManager.Add(String.Format("Version : {0}", this.Version));
// File length
this.fileLength = this.swf.ReadUI32();
TraceManager.Add(String.Format("File length : {0} bytes", this.FileLength));
// If the file is compressed, this is where the ZLIB decompression ("inflate") begins
if (this.signature == "CWS")
{
// Begin inflating stream
ICSharpCode.SharpZipLib.Zip.Compression.Streams.InflaterInputStream inflatedStream =
new ICSharpCode.SharpZipLib.Zip.Compression.Streams.InflaterInputStream(this.stream);
swf.Stream = inflatedStream;
}
// Frame size
Rect frameSize = new Rect(swf);
this.frameWidth = frameSize.XMax;
this.frameHeight = frameSize.YMax;
TraceManager.Add(String.Format("Frame width : {0} twips ({1} pixels)", this.FrameWidth, this.FrameWidth / 20));
TraceManager.Add(String.Format("Frame height: {0} twips ({1} pixels)", this.FrameHeight, this.FrameHeight / 20));
// Frame rate (stored in UI8.UI8 format)
ushort frameRateMinor = swf.ReadUI8();
ushort frameRateMajor = swf.ReadUI8();
this.frameRate = Convert.ToSingle(String.Format("{0}.{1}", frameRateMajor, frameRateMinor)); // TODO: Improve this later
TraceManager.Add(String.Format("Frame rate : {0} fps", this.FrameRate));
// Frame count
this.frameCount = swf.ReadUI16();
TraceManager.Add(String.Format("Frame count : {0}", this.FrameCount));
return(true);
}
public Tag(SWFReader swf)
{
ushort tagInfo = swf.ReadUI16();
this.id = (ushort)(tagInfo >> 6);
this.length = (ulong)(tagInfo & 0x3f);
// Is this a long data block?
if (this.length == 0x3f)
{
this.length = swf.ReadUI32();
}
Trace.WriteLine(String.Format("Tag : {0}", GetType(this.ID)));
// For now, just skip the remainder of the tag
// ** This is normally where you'd process each tag in the file **
for (ulong index = 0; index < length; index++)
{
swf.Stream.ReadByte();
}
}
public Tag(SWFReader swf)
{
ushort tagInfo = swf.ReadUI16();
this.id = (ushort)(tagInfo >> 6);
this.length = (ulong)(tagInfo & 0x3f);
// Is this a long data block?
if (this.length == 0x3f)
{
this.length = swf.ReadUI32();
}
Trace.WriteLine(String.Format("Tag : {0}", GetType(this.ID)));
// For now, just skip the remainder of the tag
// ** This is normally where you'd process each tag in the file **
for (ulong index = 0; index < length; index++)
{
swf.Stream.ReadByte();
}
}