/// <summary>
/// Given a byte[] containing a video frame, return the video MediaType.
/// </summary>
/// <param name="frame"></param>
/// <param name="compressionData"></param>
/// <returns></returns>
private static MediaTypeVideoInfo VideoMediaTypeFromFrame(byte[] frame, out byte[] compressionData)
{
if (frame == null)
{
compressionData = null;
return(null);
}
BufferChunk bc = new BufferChunk(frame);
short headerSize = bc.NextInt16(); //first short tells us the header size
BufferChunk header = bc.NextBufferChunk(headerSize);
//The header contains a custom serialization of AM_SAMPLE2_PROPERTIES followed by
// AM_MEDIA_TYPE and an optional format type.
//AM_SAMPLE2_PROPERTIES
BufferChunk AmSample2Properties = header.NextBufferChunk(48);
//AM_MEDIA_TYPE
MediaTypeVideoInfo vmt = new MediaTypeVideoInfo();
ReconstituteBaseMediaType((MediaType)vmt, header);
compressionData = null;
if (vmt.FormatType == FormatType.VideoInfo)
{
ReconstituteVideoFormat(vmt, header, out compressionData);
}
return(vmt);
}
private void ReadPrivatePropertyFromBuffer(BufferChunk buffer)
{
byte totalLength = buffer.NextByte();
byte prefixLength = buffer.NextByte();
int dataLength = totalLength - prefixLength - 1;
// The cast to byte[] does a copy
byte[] prefix = (byte[])buffer.NextBufferChunk(prefixLength);
byte[] data = null;
if (dataLength > 0)
{
// The cast to byte[] does a copy
data = (byte[])buffer.NextBufferChunk(dataLength);
}
privs[prefix] = data;
}
//public static void Pack(BufferChunk chunk, XFORM aTrans)
//{
// chunk += aTrans.eDx;
// chunk += aTrans.eDy;
// chunk += aTrans.eM11;
// chunk += aTrans.eM12;
// chunk += aTrans.eM21;
// chunk += aTrans.eM22;
//}
//public static void Pack(BufferChunk chunk, TRIVERTEX[] vertices)
//{
// int nVertices = vertices.Length;
// // Pack the vertices, starting with the length
// chunk += nVertices;
// for (int i = 0; i < nVertices; i++)
// {
// chunk += vertices[i].x;
// chunk += vertices[i].y;
// chunk += vertices[i].Alpha;
// chunk += vertices[i].Blue;
// chunk += vertices[i].Green;
// chunk += vertices[i].Red;
// }
//}
//public static void Pack(BufferChunk chunk, GRADIENT_RECT[] gRect)
//{
// int nRects = gRect.Length;
// chunk += nRects;
// for (int i = 0; i < nRects; i++)
// {
// chunk += gRect[i].UpperLeft;
// chunk += gRect[i].LowerRight;
// }
//}
//public static void Pack(BufferChunk chunk, GBrush aBrush)
//{
// chunk += GDI32.EMR_CREATEBRUSHINDIRECT;
// chunk += (int)aBrush.Style;
// chunk += (int)aBrush.Hatching;
// chunk += aBrush.Color;
// Pack(chunk, aBrush.UniqueID);
//}
//public static void Pack(BufferChunk chunk, GPen aPen)
//{
// chunk += GDI32.EMR_CREATEPEN;
// chunk += (int)aPen.Style;
// chunk += 1;
// chunk += aPen.Color;
// Pack(chunk, aPen.UniqueID);
//}
//public static void Pack(BufferChunk chunk, GFont aFont)
//{
// chunk += GDI32.EMR_EXTCREATEFONTINDIRECTW;
// chunk += aFont.FaceName.Length;
// chunk += aFont.FaceName;
// chunk += (int)aFont.Height;
// chunk += (byte)1; // newFont.fLogFont.lfCharSet;
// chunk += (byte)0; // newFont.fLogFont.lfClipPrecision;
// chunk += (int)0; // newFont.fLogFont.lfEscapement;
// chunk += (byte)0; // newFont.fLogFont.lfItalic;
// chunk += (int)0; // newFont.fLogFont.lfOrientation;
// chunk += (byte)0; // newFont.fLogFont.lfOutPrecision;
// chunk += (byte)0; // newFont.fLogFont.lfPitchAndFamily;
// chunk += (byte)0; // newFont.fLogFont.lfQuality;
// chunk += (byte)0; // newFont.fLogFont.lfStrikeOut;
// chunk += (byte)0; // newFont.fLogFont.lfUnderline;
// chunk += (int)0; // newFont.fLogFont.lfWeight;
// chunk += (int)0; // newFont.fLogFont.lfWidth;
// // Write the GUID
// Pack(chunk, aFont.UniqueID);
//}
#endregion
#region Unpacking routines
//public static GPen UnpackGPen(BufferChunk chunk)
//{
// uint penColor;
// PenStyle penStyle;
// Guid uniqueID;
// int penSize;
// penStyle = (PenStyle)chunk.NextInt32();
// penSize = chunk.NextInt32();
// penColor = chunk.NextUInt32();
// uniqueID = UnpackGuid(chunk);
// GPen aPen = new GPen(penColor, PenType.Cosmetic, PenStyle.Solid, PenJoinStyle.Round, PenEndCap.Round, penSize, uniqueID);
// return aPen;
//}
public static Guid UnpackGuid(BufferChunk chunk)
{
int bufferLength = chunk.NextInt32(); // How many bytes did we pack
byte[] bytes = (byte[])chunk.NextBufferChunk(bufferLength);
Guid aGuid = new Guid(bytes);
return(aGuid);
}
/// <summary>
/// Extract a Guid from the next bytes in a BufferChunk
/// </summary>
/// <param name="bc"></param>
/// <returns></returns>
private static Guid NextGuid(BufferChunk bc)
{
int a = NextInt32(bc);
short b = NextInt16(bc);
short c = NextInt16(bc);
byte[] d = (byte[])bc.NextBufferChunk(8);
return(new Guid(a, b, c, d));
}
public void ReadDataFromBuffer(BufferChunk buffer)
{
SSRC = buffer.NextUInt32();
FractionLost = buffer.NextByte();
PacketsLost = ThreeBytesToInt(buffer.NextBufferChunk(3));
ExtendedHighestSequence = buffer.NextUInt32();
Jitter = buffer.NextUInt32();
LastSenderReport = buffer.NextUInt32();
DelaySinceLastSenderReport = buffer.NextUInt32();
}
private void ReadPropertyFromBuffer(int type, BufferChunk buffer)
{
int dataLength = buffer.NextByte();
if (dataLength != 0)
{
data[type] = (byte[])buffer.NextBufferChunk(dataLength);
}
else // Clear value
{
data[type] = null;
}
}
/// <summary>
/// Take the DirectShow header off the frame and return the remainder.
/// Also indicate whether the keyframe flag is set.
/// </summary>
/// <param name="frame"></param>
/// <returns></returns>
public static BufferChunk FrameToSample(BufferChunk frame, out bool keyframe)
{
short headerSize = frame.NextInt16(); //first short tells us the header size
BufferChunk header = null;
header = frame.NextBufferChunk(headerSize);
AM_SAMPLE2_PROPERTIES amsp = ReconstituteSampleProperties(header);
if ((amsp.dwSampleFlags & 1) > 0)
{
keyframe = true;
}
else
{
keyframe = false;
}
//Debug.WriteLine("FrameToSample returning sample of size=" + frame.Length);
return(frame);
}
public override void ReadDataFromBuffer(BufferChunk buffer)
{
SSRC = buffer.NextUInt32();
name = (byte[])buffer.NextBufferChunk(4);
if(buffer.Length != 0)
{
data = (byte[])buffer.NextBufferChunk(buffer.Length);
}
}
/// <summary>
/// Converts buffer into member data
/// </summary>
/// <param name="packet"></param>
public override void ReadDataFromBuffer(BufferChunk buffer)
{
// Read SSRCs
for(int i = 0; i < Header.ItemCount; i++)
{
ssrcs.Add(buffer.NextUInt32());
}
// Determine if there is a reason...
// SSRCs are 32 bits each, Length is number of 32 bit words in packet data
if(Header.Length > Header.ItemCount)
{
reason = (byte[])buffer.NextBufferChunk(buffer.NextByte());
}
}
/// <summary>
/// Constructor which creates a generic RtcpPacket from an existing buffer
/// </summary>
/// <param name="buffer"></param>
public RtcpPacket(BufferChunk buffer)
{
header = new RtcpHeader(buffer.NextBufferChunk(RtcpHeader.SIZE));
this.buffer = buffer.NextBufferChunk(Header.Length * 4);
}
/// <summary>
/// Removes padding to make sure buffer ends on a 32 bit boundary
/// </summary>
/// <param name="cbBuffer">Size of buffer in bytes</param>
protected static void RemovePadding(BufferChunk buffer)
{
int padding = buffer.Length % 4;
if(padding > 0)
{
buffer.NextBufferChunk(padding);
}
}
private void ReadPrivatePropertyFromBuffer(BufferChunk buffer)
{
byte totalLength = buffer.NextByte();
byte prefixLength = buffer.NextByte();
int dataLength = totalLength - prefixLength - 1;
// The cast to byte[] does a copy
byte[] prefix = (byte[])buffer.NextBufferChunk(prefixLength);
byte[] data = null;
if(dataLength > 0)
{
// The cast to byte[] does a copy
data = (byte[])buffer.NextBufferChunk(dataLength);
}
privs[prefix] = data;
}
private void ReadPropertyFromBuffer(int type, BufferChunk buffer)
{
int dataLength = buffer.NextByte();
if(dataLength != 0)
{
data[type] = (byte[])buffer.NextBufferChunk(dataLength);
}
else // Clear value
{
data[type] = null;
}
}
public void ReadDataFromBuffer(BufferChunk buffer)
{
SSRC = buffer.NextUInt32();
FractionLost = buffer.NextByte();
PacketsLost = ThreeBytesToInt(buffer.NextBufferChunk(3));
ExtendedHighestSequence = buffer.NextUInt32();
Jitter = buffer.NextUInt32();
LastSenderReport = buffer.NextUInt32();
DelaySinceLastSenderReport = buffer.NextUInt32();
}
/// <summary>
/// Sends the plan to server.
/// </summary>
/// <param name="spots">The spots.</param>
/// <param name="nblocks">The nblocks.</param>
/// <returns><c>true</c> if OK, <c>false</c> otherwise.</returns>
/// <exception cref="SendPlanException">
/// </exception>
public virtual bool Send(List <Spot> spots, uint nblocks = 10)
{
if (!IsConnected)
{
if (Globals.Debug)
{
Console.WriteLine(Resources.Server_is_not_connected);
}
return(false);
}
BufferChunk.SetNetworking();
var plan = new BufferChunk();
foreach (var spot in spots)
{
plan.Add(spot);
}
var len = Spot.Length * nblocks;
if (Globals.Debug)
{
Console.WriteLine(Resources.Sending_plan_to_server + ": length = " +
(plan.Length / 1000.0) + " Kb");
}
try {
while (plan.Length > len)
{
var bf = plan.NextBufferChunk((int)len);
Send(bf);
}
try {
if (plan.Length >= Spot.Length)
{
var bf = plan.NextBufferChunk(plan.Length);
Send(bf);
}
} catch {
throw new SendPlanException();
}
} catch {
if (plan.Length >= Spot.Length) // send the last portion of data
{
try {
var bf = plan.NextBufferChunk(plan.Length);
Send(bf);
} catch {
throw new SendPlanException();
}
}
}
if (Globals.Debug)
{
Console.WriteLine(Resources.Plan_sent_to_server);
}
SendCommand(EPlanCommand.GETSTATE);
return(true);
}
