private static void CreateFrameSection(byte[] buffer, int bufferStartIndex, FrameWithoutDelta frame,
int frameIndex, int sectionIndex, int instructionStartIndex, int numberOfInstructions)
{
FrameSectionPackage package = new FrameSectionPackage();
package.FrameSequenceIndex = frameIndex;
package.Index = sectionIndex;
package.pixelInstructions = new List <PixelInstruction>();
for (int i = instructionStartIndex; i < instructionStartIndex + numberOfInstructions; i++)
{
package.pixelInstructions.Add(frame[i]);
}
FrameSectionProtocol.Serialize(package, buffer, bufferStartIndex);
}
/// <summary>
/// Deserialize a package
/// </summary>
/// <param name="buffer"></param>
/// <returns>True if the frame has been deserialized, False if not all packages have been received.</returns>
public bool TryDeserialize(byte[] bytes, out FrameWithoutDelta frame)
{
frame = null;
if (_frameSectionPackages == null)
{
// First package.
// Read Frame header
int startIndex = 0;
_frameIndex = BitConverter.ToInt32(bytes, startIndex);
_timeStampRelative = BitConverter.ToInt32(bytes, startIndex += 4);
int itemCount = BitConverter.ToInt32(bytes, startIndex += 4);
bool hasFrameSections = BitConverter.ToBoolean(bytes, startIndex += 4);
startIndex += 1;
if (hasFrameSections)
{
_frameSectionPackages = new FrameSectionPackage[itemCount];
_frameSectionsReceived = new bool[itemCount];
_frameSectionsReceived[0] = true;
// The rest of the package is a FrameSection
_frameSectionPackages[0] = FrameSectionProtocol.Deserialize(bytes, startIndex);
return(false);
}
else
{
frame = new FrameWithoutDelta(_frameIndex, _timeStampRelative, itemCount);
// The rest of the package contains PixelInstructions
for (int i = 0; i < itemCount; i++)
{
int instructionStartIndex = startIndex + i * PixelInstructionProtocol.BYTES_NEEDED;
frame[i] = PixelInstructionProtocol.Deserialize(bytes, instructionStartIndex);
}
return(true);
}
}
else
{
// Subsequent package. Always starts with a FrameSection.
FrameSectionPackage package = FrameSectionProtocol.Deserialize(bytes, 0);
if (package.FrameSequenceIndex != _frameIndex)
{
throw new System.Net.ProtocolViolationException(
$"The frameIndex of the frameSection does not match with the Frame's index. Expected :{_frameIndex}, Received: {package.FrameSequenceIndex}");
}
_frameSectionPackages[package.Index] = package;
_frameSectionsReceived[package.Index] = true;
if (_frameSectionsReceived.All(x => x))
{
// TODO add totalNumberOfPixelInstructions to frame header
int totalPixelInstructions = _frameSectionPackages.Sum(x => x.NumberOfPixelInstructions);
frame = new FrameWithoutDelta(_frameIndex, _timeStampRelative, totalPixelInstructions);
int index = 0;
for (int i = 0; i < _frameSectionPackages.Length; i++)
{
for (int j = 0; j < _frameSectionPackages[i].NumberOfPixelInstructions; j++)
{
frame[index++] = _frameSectionPackages[i].pixelInstructions[j];
}
}
return(true);
}
return(false);
}
}