protected override Frame ParseFrame(byte[] data)
{
int place=0;
SingleByteField encodingField=new SingleByteField();
place+=encodingField.Parse(data, place);
TextField imageFormatField=TextField.CreateTextField(true,EncodingScheme.Ascii);
place+=imageFormatField.Parse(data, place);
SingleByteField pictureTypeField=new SingleByteField();
place+=pictureTypeField.Parse(data, place);
TextField descriptionField=TextField.CreateTextField(true,(EncodingScheme)encodingField.Value);
place+=descriptionField.Parse(data, place);
BinaryField dataField=new BinaryField();
place+=dataField.Parse(data, place);
System.IO.MemoryStream memoryImageBuffer=new System.IO.MemoryStream(dataField.Data);
try
{
System.Drawing.Image image=System.Drawing.Image.FromStream(memoryImageBuffer);
return new PictureFrame(dataField.Data, image, descriptionField.Text, (PictureType)pictureTypeField.Value);
}
catch(ArgumentException)
{
throw new FrameParsingException("Unrecognized picture format found in Picture frame.");
}
}
protected override Frame ParseFrame(byte[] data)
{
//Text encoding $xx
//MIME type <text string> $00
//Filename <text string according to encoding> $00 (00)
//Content description <text string according to encóding> $00 (00)
//Encapsulated object <binary data>
int place=0;
SingleByteField encodingField=new SingleByteField();
place+=encodingField.Parse(data, place);
TextField mimeTypeField=TextField.CreateTextField(true,EncodingScheme.Ascii);
place+=mimeTypeField.Parse(data, place);
TextField fileNameField=TextField.CreateTextField(true,(EncodingScheme)encodingField.Value);
place+=fileNameField.Parse(data, place);
TextField contentDescriptionField=TextField.CreateTextField(true, (EncodingScheme)encodingField.Value);
place+=contentDescriptionField.Parse(data, place);
BinaryField dataField=new BinaryField();
place+=dataField.Parse(data, place);
return new GeneralEncapsulatedObjectFrame(
fileNameField.Text,
contentDescriptionField.Text,
mimeTypeField.Text,
dataField.Data);
}
protected override Frame ParseFrame(byte[] data)
{
int place=0;
BinaryField dataField=new BinaryField();
place+=dataField.Parse(data, place);
return new MusicCDIdentifierFrame(dataField.Data);
}
protected override Frame ParseFrame(byte[] data)
{
int place=0;
TextField ownerField=TextField.CreateTextField(true, EncodingScheme.Ascii);
place+=ownerField.Parse(data, place);
BinaryField dataField=new BinaryField();
place+=dataField.Parse(data, place);
return new UniqueFileIdentifierFrame(dataField.Data,ownerField.Text);
}
public void TestWrite()
{
for(int testCase=0;testCase<100;testCase++)
{
byte[] randomData=new byte[_randomNumberGenerator.Next(1, 50000)];
_randomNumberGenerator.NextBytes(randomData);
BinaryField field=new BinaryField(randomData, 0, randomData.Length);
MemoryStream stream=new MemoryStream();
field.WriteToStream(stream);
Assert.AreEqual(stream.Length, randomData.Length);
for(int i = 0;i < randomData.Length;i++)
{
Assert.AreEqual(randomData[i], stream.GetBuffer()[i]);
}
}
}
public void TestRead()
{
for(int testCase=0;testCase<100;testCase++)
{
byte[] randomData=new byte[_randomNumberGenerator.Next(1, 50000)];
int offset=_randomNumberGenerator.Next(0, randomData.Length-1);
_randomNumberGenerator.NextBytes(randomData);
BinaryField field=new BinaryField();
field.Parse(randomData, offset);
Assert.AreEqual(field.Data.Length, randomData.Length-offset);
Assert.AreEqual(field.Length, randomData.Length-offset);
Assert.AreEqual(field.Length, field.Data.Length);
for(int i = offset;i < randomData.Length;i++)
{
Assert.AreEqual(randomData[i], field.Data[i-offset]);
}
}
}
protected override Frame ParseFrame(byte[] data)
{
int place=0;
BinaryField dataField=new BinaryField();
place+=dataField.Parse(data, place);
if(dataField.Data.Length!=4)
{
throw new FrameParsingException("Length of a Play Counter frame should be exactly 4. Larger frames are not yet supported.");
}
int counter=
(((int)dataField.Data[0]) << 24) +
(((int)dataField.Data[1]) << 16) +
(((int)dataField.Data[2]) << 8) +
((int)dataField.Data[3]);
return new PlayCounterFrame(counter);
}
