private void ProcessServerDescription(IBufferPacket data)
{
StspDescription desc = new StspDescription();
var dataLen = data.GetLength();
int descSize = Marshal.SizeOf(typeof(StspDescription));
int streamDescSize = Marshal.SizeOf(typeof(StspStreamDescription));
// Copy description
desc = StreamConvertor.TakeObject <StspDescription>(data);
// Size of the packet should match size described in the packet (size of Description structure + size of attribute blob)
var cbConstantSize = Convert.ToInt32(descSize + (desc.cNumStreams - 1) * streamDescSize);
// Check if the input parameters are valid. We only support 2 streams.
if (cbConstantSize < Marshal.SizeOf(desc) || desc.cNumStreams == 0 || desc.cNumStreams > 2 || dataLen < cbConstantSize)
{
ThrowIfError(HResult.MF_E_UNSUPPORTED_FORMAT);
}
try
{
List <StspStreamDescription> streamDescs = new List <StspStreamDescription>(desc.aStreams);
for (int i = 1; i < desc.cNumStreams; i++)
{
var sd = StreamConvertor.TakeObject <StspStreamDescription>(data);
streamDescs.Add(sd);
}
int cbAttributeSize = 0;
for (int i = 0; i < desc.cNumStreams; ++i)
{
cbAttributeSize += streamDescs[i].cbAttributesSize;
/* todo: check out of range on cbAttributeSize
* if (out of range)
* {
* Throw(HResult.MF_E_UNSUPPORTED_FORMAT);
* }*/
}
// Validate the parameters. Limit the total size of attributes to 64kB.
if ((dataLen != (cbConstantSize + cbAttributeSize)) || (cbAttributeSize > 0x10000))
{
Throw(HResult.MF_E_UNSUPPORTED_FORMAT);
}
//only init for the first video stream.
foreach (var sd in streamDescs)
{
if (sd.guiMajorType == MFMediaType.Video)
{
initVideoDesctriptor(sd, data);
_decoder.initialize(_videoStreamId, _videoMediaType);
break;
}
}
}
catch (Exception ex)
{
throw ex;
}
}
private void ProcessServerDescription(IBufferPacket data)
{
StspDescription desc = new StspDescription();
var dataLen = data.GetLength();
int descSize = Marshal.SizeOf(typeof(StspDescription));
int streamDescSize = Marshal.SizeOf(typeof(StspStreamDescription));
// Copy description
desc = StreamConvertor.TakeObject <StspDescription>(data);
// Size of the packet should match size described in the packet (size of Description structure + size of attribute blob)
var cbConstantSize = Convert.ToInt32(descSize + (desc.cNumStreams - 1) * streamDescSize);
// Check if the input parameters are valid. We only support 2 streams.
if (cbConstantSize < Marshal.SizeOf(desc) || desc.cNumStreams == 0 || desc.cNumStreams > 2 || dataLen < cbConstantSize)
{
ThrowIfError(HResult.MF_E_UNSUPPORTED_FORMAT);
}
try
{
List <StspStreamDescription> streamDescs = new List <StspStreamDescription>(desc.aStreams);
for (int i = 1; i < desc.cNumStreams; i++)
{
var sd = StreamConvertor.TakeObject <StspStreamDescription>(data);
streamDescs.Add(sd);
}
int cbAttributeSize = 0;
for (int i = 0; i < desc.cNumStreams; ++i)
{
cbAttributeSize += streamDescs[i].cbAttributesSize;
/* todo: check out of range on cbAttributeSize
* if (out of range)
* {
* Throw(HResult.MF_E_UNSUPPORTED_FORMAT);
* }*/
}
// Validate the parameters. Limit the total size of attributes to 64kB.
if ((dataLen != (cbConstantSize + cbAttributeSize)) || (cbAttributeSize > 0x10000))
{
Throw(HResult.MF_E_UNSUPPORTED_FORMAT);
}
// Create stream for every stream description sent by the server.
foreach (var sd in streamDescs)
{
MediaStream spStream;
ThrowIfError(MediaStream.CreateInstance(sd, data, this, out spStream));
_streams.Add(spStream);
}
InitPresentationDescription();
// Everything succeeded we are in stopped state now
_eSourceState = SourceState.SourceState_Stopped;
CompleteOpen(HResult.S_OK);
}
catch (Exception ex)
{
throw ex;
}
}
