[idd] implemented frame feed from the guest (very hacky)

This is NOT READY for general consumption, if you decide to make
use of this driver, DO NOT ASK FOR SUPPORT.

idd/LGIdd/CIndirectDeviceContext.cpp

@@ -4,6 +4,8 @@
 #include "CPlatformInfo.h"
 #include "Debug.h"
 
+#include <sstream>
+
 static const struct LGMPQueueConfig FRAME_QUEUE_CONFIG =
 {
   LGMP_Q_FRAME,       //queueID
@@ -73,7 +75,10 @@ void CIndirectDeviceContext::InitAdapter()
   IDARG_OUT_ADAPTER_INIT initOut;
   NTSTATUS status = IddCxAdapterInitAsync(&init, &initOut);
   if (!NT_SUCCESS(status))
+  {
+    DBGPRINT("IddCxAdapterInitAsync Failed");
     return;
+  }
 
   m_adapter = initOut.AdapterObject;
 
@@ -147,17 +152,18 @@ void CIndirectDeviceContext::FinishInit(UINT connectorIndex)
   IDARG_OUT_MONITORCREATE createOut;
   NTSTATUS status = IddCxMonitorCreate(m_adapter, &create, &createOut);
   if (!NT_SUCCESS(status))
+  {
+    DBGPRINT("IddCxMonitorCreate Failed");
     return;
+  }
 
   auto * wrapper = WdfObjectGet_CIndirectMonitorContextWrapper(createOut.MonitorObject);
-  wrapper->context = new CIndirectMonitorContext(createOut.MonitorObject);
+  wrapper->context = new CIndirectMonitorContext(createOut.MonitorObject, this);
 
   IDARG_OUT_MONITORARRIVAL out;
   status = IddCxMonitorArrival(createOut.MonitorObject, &out);
 }
 
-#include <sstream>
-
 bool CIndirectDeviceContext::SetupLGMP()
 {
   if (!m_ivshmem.Init() || !m_ivshmem.Open())
@@ -177,6 +183,11 @@ bool CIndirectDeviceContext::SetupLGMP()
     const std::string & model = CPlatformInfo::GetCPUModel();
 
     KVMFRRecord_VMInfo * vmInfo = static_cast<KVMFRRecord_VMInfo *>(calloc(1, sizeof(*vmInfo)));
+    if (!vmInfo)
+    {
+      DBGPRINT("Failed to allocate KVMFRRecord_VMInfo");
+      return false;
+    }
     vmInfo->cpus    = static_cast<uint8_t>(CPlatformInfo::GetProcCount  ());
     vmInfo->cores   = static_cast<uint8_t>(CPlatformInfo::GetCoreCount  ());
     vmInfo->sockets = static_cast<uint8_t>(CPlatformInfo::GetSocketCount());
@@ -186,6 +197,12 @@ bool CIndirectDeviceContext::SetupLGMP()
     strncpy_s(vmInfo->capture, "Idd Driver", sizeof(vmInfo->capture));
 
     KVMFRRecord * record = static_cast<KVMFRRecord *>(calloc(1, sizeof(*record)));
+    if (!record)
+    {
+      DBGPRINT("Failed to allocate KVMFRRecord");
+      return false;
+    }
+
     record->type = KVMFR_RECORD_VMINFO;
     record->size = sizeof(*vmInfo) + (uint32_t)model.length() + 1;
 
@@ -196,11 +213,23 @@ bool CIndirectDeviceContext::SetupLGMP()
 
   {
     KVMFRRecord_OSInfo * osInfo = static_cast<KVMFRRecord_OSInfo *>(calloc(1, sizeof(*osInfo)));
+    if (!osInfo)
+    {
+      DBGPRINT("Failed to allocate KVMFRRecord_OSInfo");
+      return false;
+    }
+
     osInfo->os = KVMFR_OS_WINDOWS;
 
     const std::string & osName = CPlatformInfo::GetProductName();
 
     KVMFRRecord* record = static_cast<KVMFRRecord*>(calloc(1, sizeof(*record)));
+    if (!record)
+    {
+      DBGPRINT("Failed to allocate KVMFRRecord");
+      return false;
+    }
+
     record->type = KVMFR_RECORD_OSINFO;
     record->size = sizeof(*osInfo) + (uint32_t)osName.length() + 1;
 
@@ -330,3 +359,72 @@ void CIndirectDeviceContext::LGMPTimer()
     lgmpHostAckData(m_pointerQueue);
   }
 }
+
+void CIndirectDeviceContext::SendFrame(int width, int height, int pitch, DXGI_FORMAT format, void* data)
+{
+  if (!m_lgmp || !m_frameQueue)
+    return;
+
+  if (m_width != width || m_height != height || m_format != format)
+  {
+    m_width  = width;
+    m_height = height;
+    m_format = format;
+    ++m_formatVer;
+  }
+
+  while (lgmpHostQueuePending(m_frameQueue) == LGMP_Q_FRAME_LEN)
+    Sleep(0);
+
+  if (++m_frameIndex == LGMP_Q_FRAME_LEN)
+    m_frameIndex = 0;
+
+  KVMFRFrame * fi = (KVMFRFrame *)lgmpHostMemPtr(m_frameMemory[m_frameIndex]);
+  int bpp = 4;
+  switch (format)
+  {
+    case DXGI_FORMAT_B8G8R8A8_UNORM    : fi->type = FRAME_TYPE_BGRA   ; break;
+    case DXGI_FORMAT_R8G8B8A8_UNORM    : fi->type = FRAME_TYPE_RGBA   ; break;
+    case DXGI_FORMAT_R10G10B10A2_UNORM : fi->type = FRAME_TYPE_RGBA10 ; break;
+
+    case DXGI_FORMAT_R16G16B16A16_FLOAT:
+      fi->type = FRAME_TYPE_RGBA16F;
+      bpp = 8;
+      break;
+
+    default:
+      DBGPRINT("Unsuppoted DXGI format");
+      return;
+  }
+
+  //FIXME: this should not really be done here, this is a hack
+  #pragma warning(push)
+  #pragma warning(disable: 4200)
+  struct FrameBuffer
+  {
+    volatile uint32_t wp;
+    uint8_t data[0];
+  };
+  #pragma warning(pop)
+
+  fi->formatVer    = m_formatVer;
+  fi->frameSerial  = m_frameSerial++;
+  fi->screenWidth  = width;
+  fi->screenHeight = height;
+  fi->frameWidth   = width;
+  fi->frameHeight  = height;
+  fi->stride       = width * bpp;
+  fi->pitch        = pitch;
+  fi->offset       = (uint32_t)(CPlatformInfo::GetPageSize() - sizeof(FrameBuffer));
+  fi->flags        = 0;
+  fi->rotation     = FRAME_ROT_0;
+
+  fi->damageRectsCount = 0;
+
+  FrameBuffer * fb = (FrameBuffer *)(((uint8_t*)fi) + fi->offset);
+  fb->wp = 0;
+
+  lgmpHostQueuePost(m_frameQueue, 0, m_frameMemory[m_frameIndex]);
+  memcpy(fb->data, data, (size_t)height * (size_t)pitch);
+  fb->wp = height * pitch;
+}

idd/LGIdd/CIndirectDeviceContext.h

@@ -29,8 +29,15 @@ private:
   PLGMPMemory    m_pointerShapeMemory[POINTER_SHAPE_BUFFERS] = {};
 
   size_t         m_maxFrameSize = 0;
+  int            m_frameIndex   = 0;
+  uint32_t       m_formatVer    = 0;
+  uint32_t       m_frameSerial  = 0;
   PLGMPMemory    m_frameMemory[LGMP_Q_FRAME_LEN] = {};
 
+  int         m_width  = 0;
+  int         m_height = 0;
+  DXGI_FORMAT m_format = DXGI_FORMAT_UNKNOWN;
+
   bool SetupLGMP();
 
   void LGMPTimer();
@@ -46,6 +53,8 @@ public:
   void InitAdapter();
 
   void FinishInit(UINT connectorIndex);
+
+  void SendFrame(int width, int height, int pitch, DXGI_FORMAT format, void* data);
 };
 
 struct CIndirectDeviceContextWrapper

idd/LGIdd/CIndirectMonitorContext.cpp

@@ -1,8 +1,9 @@
 #include "CIndirectMonitorContext.h"
 #include "Direct3DDevice.h"
 
-CIndirectMonitorContext::CIndirectMonitorContext(_In_ IDDCX_MONITOR monitor) :
+CIndirectMonitorContext::CIndirectMonitorContext(_In_ IDDCX_MONITOR monitor, CIndirectDeviceContext * device) :
-  m_monitor(monitor)
+  m_monitor(monitor),
+  m_devContext(device)
 {
 }
 
@@ -21,7 +22,7 @@ void CIndirectMonitorContext::AssignSwapChain(IDDCX_SWAPCHAIN swapChain, LUID re
     return;
   }
 
-  m_thread.reset(new CSwapChainProcessor(swapChain, device, newFrameEvent));
+  m_thread.reset(new CSwapChainProcessor(m_devContext, swapChain, device, newFrameEvent));
 }
 
 void CIndirectMonitorContext::UnassignSwapChain()

idd/LGIdd/CIndirectMonitorContext.h

@@ -5,16 +5,18 @@
 #include <IddCx.h>
 
 #include <memory>
+#include "CIndirectDeviceContext.h"
 #include "CSwapChainProcessor.h"
 
 class CIndirectMonitorContext
 {
 protected:
   IDDCX_MONITOR m_monitor;
+  CIndirectDeviceContext * m_devContext;
   std::unique_ptr<CSwapChainProcessor> m_thread;
 
 public:
-  CIndirectMonitorContext(_In_ IDDCX_MONITOR monitor);
+  CIndirectMonitorContext(_In_ IDDCX_MONITOR monitor, CIndirectDeviceContext * device);
 
   virtual ~CIndirectMonitorContext();
   

idd/LGIdd/CPlatformInfo.cpp

@@ -218,6 +218,11 @@ void CPlatformInfo::InitCPUInfo()
   }
 
   BYTE * buffer = static_cast<BYTE *>(_malloca(cb));
+  if (!buffer)
+  {
+    DBGPRINT("Failed to allocate buffer for processor information");
+    return;
+  }
   if (!GetLogicalProcessorInformationEx(RelationAll,
     (PSYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX)buffer, &cb))
   {

idd/LGIdd/CSwapChainProcessor.cpp

@@ -1,36 +1,48 @@
 #include "CSwapChainProcessor.h"
 
 #include <avrt.h>
+#include "Debug.h"
 
+#define LOCK_CONTEXT() \
+  while (InterlockedCompareExchange((volatile LONG*)&m_contextLock, 1, 0) != 0) {};
 
-CSwapChainProcessor::CSwapChainProcessor(IDDCX_SWAPCHAIN hSwapChain, std::shared_ptr<Direct3DDevice> device, HANDLE newFrameEvent) :
+#define UNLOCK_CONTEXT() \
+  InterlockedExchange((volatile LONG*)&m_contextLock, 0);
+
+CSwapChainProcessor::CSwapChainProcessor(CIndirectDeviceContext* devContext, IDDCX_SWAPCHAIN hSwapChain,
+    std::shared_ptr<Direct3DDevice> device, HANDLE newFrameEvent) :
+  m_devContext(devContext),
   m_hSwapChain(hSwapChain),
   m_device(device),
   m_newFrameEvent(newFrameEvent)
 {  
   m_terminateEvent.Attach(CreateEvent(nullptr, FALSE, FALSE, nullptr));
-  m_thread.Attach(CreateThread(nullptr, 0, RunThread, this, 0, nullptr));
+  m_thread[0].Attach(CreateThread(nullptr, 0, _SwapChainThread, this, 0, nullptr));
+  m_thread[1].Attach(CreateThread(nullptr, 0, _FrameThread    , this, 0, nullptr));
 }
 
 CSwapChainProcessor::~CSwapChainProcessor()
 {
   SetEvent(m_terminateEvent.Get());
-  if (m_thread.Get())
+  if (m_thread[0].Get())
-    WaitForSingleObject(m_thread.Get(), INFINITE);
+    WaitForSingleObject(m_thread[0].Get(), INFINITE);
+  if (m_thread[1].Get())
+    WaitForSingleObject(m_thread[1].Get(), INFINITE);
 }
 
-DWORD CALLBACK CSwapChainProcessor::RunThread(LPVOID argument)
+DWORD CALLBACK CSwapChainProcessor::_SwapChainThread(LPVOID arg)
 {
-  reinterpret_cast<CSwapChainProcessor*>(argument)->Run();
+  reinterpret_cast<CSwapChainProcessor*>(arg)->SwapChainThread();
   return 0;
 }
 
-void CSwapChainProcessor::Run()
+void CSwapChainProcessor::SwapChainThread()
 {
   DWORD  avTask       = 0;
   HANDLE avTaskHandle = AvSetMmThreadCharacteristicsW(L"Distribution", &avTask);
 
-  RunCore();
+  DBGPRINT("Start");
+  SwapChainThreadCore();
 
   WdfObjectDelete((WDFOBJECT)m_hSwapChain);
   m_hSwapChain = nullptr;
@@ -38,28 +50,41 @@ void CSwapChainProcessor::Run()
   AvRevertMmThreadCharacteristics(avTaskHandle);
 }
 
-void CSwapChainProcessor::RunCore()
+void CSwapChainProcessor::SwapChainThreadCore()
 {  
   Microsoft::WRL::ComPtr<IDXGIDevice> dxgiDevice;
   HRESULT hr = m_device->m_device.As(&dxgiDevice);
   if (FAILED(hr))
+  {
+    DBGPRINT("Failed to get the dxgiDevice");
     return;
+  }
 
   IDARG_IN_SWAPCHAINSETDEVICE setDevice = {};
   setDevice.pDevice = dxgiDevice.Get();
 
+  LOCK_CONTEXT();
   hr = IddCxSwapChainSetDevice(m_hSwapChain, &setDevice);
-  if (FAILED(hr))
+  UNLOCK_CONTEXT();
-    return;
 
+  if (FAILED(hr))
+  {
+    DBGPRINT("IddCxSwapChainSetDevice Failed");
+    return;
+  }
+
+  UINT lastFrameNumber = 0;
   for (;;)
   {
-    Microsoft::WRL::ComPtr<IDXGIResource> acquiredBuffer;
+    ComPtr<IDXGIResource> acquiredBuffer;
     IDARG_OUT_RELEASEANDACQUIREBUFFER buffer = {};
+
+    LOCK_CONTEXT();
     hr = IddCxSwapChainReleaseAndAcquireBuffer(m_hSwapChain, &buffer);
 
     if (hr == E_PENDING)
     {
+      UNLOCK_CONTEXT();
       HANDLE waitHandles[] =
       {
         m_newFrameEvent,
@@ -78,16 +103,132 @@ void CSwapChainProcessor::RunCore()
     }
     else if (SUCCEEDED(hr))
     {
-      //acquiredBuffer.Attach(buffer.MetaData.pSurface);
+      if (buffer.MetaData.PresentationFrameNumber != lastFrameNumber)
+      {
+        lastFrameNumber = buffer.MetaData.PresentationFrameNumber;
+        if (m_copyCount < STAGING_TEXTURES)
+        {
+          acquiredBuffer.Attach(buffer.MetaData.pSurface);
+          SwapChainNewFrame(acquiredBuffer);
+          acquiredBuffer.Reset();
+        }        
+      }
 
-      //TODO: process the frame
-
-      //acquiredBuffer.Reset();
       hr = IddCxSwapChainFinishedProcessingFrame(m_hSwapChain);
+      UNLOCK_CONTEXT();
       if (FAILED(hr))
         break;
     }
     else
+    {
+      UNLOCK_CONTEXT();
       break;
+    }
   }
 }
+
+void CSwapChainProcessor::SwapChainNewFrame(ComPtr<IDXGIResource> acquiredBuffer)
+{
+  Microsoft::WRL::ComPtr<ID3D11Texture2D> texture;
+  if (FAILED(acquiredBuffer->QueryInterface(__uuidof(ID3D11Texture2D), (void**)&texture)))
+  {
+    DBGPRINT("Failed to obtain the ID3D11Texture2D from the acquiredBuffer");
+    return;
+  }
+
+  D3D11_TEXTURE2D_DESC desc;
+  texture->GetDesc(&desc);
+
+  if (!SetupStagingTexture(m_cpuTex[m_texWIndex], desc.Width, desc.Height, desc.Format))
+    return;
+
+  m_device->m_context->CopyResource(m_cpuTex[m_texWIndex].tex.Get(), texture.Get());
+
+  InterlockedAdd(&m_copyCount, 1);
+  if (++m_texWIndex == STAGING_TEXTURES)
+    m_texWIndex = 0;
+}
+
+DWORD CALLBACK CSwapChainProcessor::_FrameThread(LPVOID arg)
+{
+  reinterpret_cast<CSwapChainProcessor*>(arg)->FrameThread();
+  return 0;
+}
+
+void CSwapChainProcessor::FrameThread()
+{
+  for(;;)
+  {
+    if (WaitForSingleObject(m_terminateEvent.Get(), 0) == WAIT_OBJECT_0)
+      break;
+
+    if (!m_copyCount)
+    {
+      Sleep(0);
+      continue;
+    }
+
+    D3D11_MAPPED_SUBRESOURCE map;
+    StagingTexture & t = m_cpuTex[m_texRIndex];
+
+    LOCK_CONTEXT();
+    HRESULT status = m_device->m_context->Map(t.tex.Get(), 0, D3D11_MAP_READ, D3D11_MAP_FLAG_DO_NOT_WAIT, &map);
+    UNLOCK_CONTEXT();
+
+    if (FAILED(status))
+    {
+      if (status == DXGI_ERROR_WAS_STILL_DRAWING)
+        continue;
+
+      DBGPRINT("Failed to map staging texture");
+
+      InterlockedAdd(&m_copyCount, -1);
+      if (++m_texRIndex == STAGING_TEXTURES)
+        m_texRIndex = 0;
+
+      continue;
+    }
+
+    m_devContext->SendFrame(t.width, t.height, map.RowPitch, t.format, map.pData);
+
+    LOCK_CONTEXT();
+    m_device->m_context->Unmap(t.tex.Get(), 0);
+    UNLOCK_CONTEXT();
+
+    InterlockedAdd(&m_copyCount, -1);
+    if (++m_texRIndex == STAGING_TEXTURES)
+      m_texRIndex = 0;
+  }
+}
+
+bool CSwapChainProcessor::SetupStagingTexture(StagingTexture & t, int width, int height, DXGI_FORMAT format)
+{
+  if (t.width == width && t.height == height && t.format == format)
+    return true;
+
+  t.tex.Reset();
+  t.width  = width;
+  t.height = height;
+  t.format = format;
+
+  D3D11_TEXTURE2D_DESC desc = {};
+  desc.Width              = width;
+  desc.Height             = height;
+  desc.MipLevels          = 1;
+  desc.ArraySize          = 1;
+  desc.SampleDesc.Count   = 1;
+  desc.SampleDesc.Quality = 0;
+  desc.Usage              = D3D11_USAGE_STAGING;
+  desc.Format             = format;
+  desc.BindFlags          = 0;
+  desc.CPUAccessFlags     = D3D11_CPU_ACCESS_READ;
+  desc.MiscFlags          = 0;
+
+  if (FAILED(m_device->m_device->CreateTexture2D(&desc, nullptr, &t.tex)))
+  {
+    DBGPRINT("Failed to create staging texture");
+    return false;
+  }
+
+  return true;
+}

idd/LGIdd/CSwapChainProcessor.h

@@ -1,30 +1,55 @@
 #pragma once
 
 #include "Direct3DDevice.h"
+#include "CIndirectDeviceContext.h"
 
 #include <Windows.h>
 #include <wrl.h>
 #include <IddCx.h>
 #include <memory>
 
+using namespace Microsoft::WRL;
+
+#define STAGING_TEXTURES 3
+
 class CSwapChainProcessor
 {
 private:
+  CIndirectDeviceContext        * m_devContext;
   IDDCX_SWAPCHAIN                 m_hSwapChain;
   std::shared_ptr<Direct3DDevice> m_device;
   HANDLE                          m_newFrameEvent;
 
-  Microsoft::WRL::Wrappers::HandleT<
+  Wrappers::HandleT<Wrappers::HandleTraits::HANDLENullTraits> m_thread[2];
-    Microsoft::WRL::Wrappers::HandleTraits::HANDLENullTraits> m_thread;
+  Wrappers::Event m_terminateEvent;
-  Microsoft::WRL::Wrappers::Event  m_terminateEvent;
 
-  static DWORD CALLBACK RunThread(LPVOID argument);
+  static DWORD CALLBACK _SwapChainThread(LPVOID arg);
+  static DWORD CALLBACK _FrameThread(LPVOID arg);
 
-  void Run();
+  void SwapChainThread();
-  void RunCore();
+  void SwapChainThreadCore();
+  void SwapChainNewFrame(ComPtr<IDXGIResource> acquiredBuffer);
+
+  void FrameThread();
+
+  struct StagingTexture
+  {
+    int         width;
+    int         height;
+    DXGI_FORMAT format;
+    Microsoft::WRL::ComPtr<ID3D11Texture2D> tex;
+  };
+
+  StagingTexture m_cpuTex[STAGING_TEXTURES] = {};
+  volatile LONG m_copyCount   = 0;
+  volatile LONG m_contextLock = 0;
+  int m_texRIndex = 0;
+  int m_texWIndex = 0;
+
+  bool SetupStagingTexture(StagingTexture & t, int width, int height, DXGI_FORMAT format);
 
 public:
-  CSwapChainProcessor(IDDCX_SWAPCHAIN hSwapChain,
+  CSwapChainProcessor(CIndirectDeviceContext * devContext, IDDCX_SWAPCHAIN hSwapChain,
     std::shared_ptr<Direct3DDevice> device, HANDLE newFrameEvent);
   ~CSwapChainProcessor();
 };

idd/LGIdd/Device.cpp

@@ -9,6 +9,7 @@
 #include <avrt.h>
 #include <wrl.h>
 
+#include "Debug.h"
 #include "CIndirectDeviceContext.h"
 #include "CIndirectMonitorContext.h"