[host] move H264 out of DXGI into seperate class

host/MFT/H264.h

@@ -0,0 +1,101 @@
+/*
+Looking Glass - KVM FrameRelay (KVMFR) Client
+Copyright (C) 2017 Geoffrey McRae <geoff@hostfission.com>
+https://looking-glass.hostfission.com
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation; either version 2 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#pragma once
+
+#define W32_LEAN_AND_MEAN
+#include <windows.h>
+#include <shlwapi.h>
+#include <stdio.h>
+
+#include "Com.h"
+
+namespace MFT
+{
+  enum H264_Event
+  {
+    H264_EVENT_ENCODE     = 0x01,
+    H264_EVENT_NEEDS_DATA = 0x04,
+    H264_EVENT_HAS_DATA   = 0x08,
+    H264_EVENT_ERROR      = 0x10
+  };
+
+  class H264: public IMFAsyncCallback
+  {
+  public:
+    H264();
+    ~H264();
+    bool Initialize(ID3D11DevicePtr device, unsigned int width, unsigned int height);
+    void DeInitialize();
+    unsigned int Process();
+    bool ProvideFrame(ID3D11Texture2DPtr texture);
+    bool GetFrame(void * buffer, const size_t bufferSize, unsigned int & dataLen);
+
+    ID3D11DevicePtr                 m_device;
+    unsigned int                    m_width;
+    unsigned int                    m_height;
+
+    HANDLE                          m_encodeEvent;
+    HANDLE                          m_shutdownEvent;
+    bool                            m_encodeNeedsData;
+    bool                            m_encodeHasData;
+    CRITICAL_SECTION                m_encodeCS;
+
+    UINT                            m_resetToken;
+    IMFDXGIDeviceManagerPtr         m_mfDeviceManager;
+    IMFActivatePtr                  m_mfActivation;
+    IMFTransformPtr                 m_mfTransform;
+    IMFMediaEventGeneratorPtr       m_mediaEventGen;
+
+    /*
+    Junk needed for the horrid IMFAsyncCallback interface
+    */
+    STDMETHODIMP QueryInterface(REFIID riid, void ** ppv)
+    {
+      if (riid == __uuidof(IUnknown) || riid == __uuidof(IMFAsyncCallback)) {
+        *ppv = static_cast<IMFAsyncCallback*>(this);
+        AddRef();
+        return S_OK;
+      }
+      else {
+        *ppv = NULL;
+        return E_NOINTERFACE;
+      }
+    }
+
+    STDMETHODIMP_(ULONG) AddRef()
+    {
+      return InterlockedIncrement(&m_cRef);
+    }
+
+    STDMETHODIMP_(ULONG) Release()
+    {
+      long cRef = InterlockedDecrement(&m_cRef);
+      if (!cRef)
+        delete this;
+      return cRef;
+    }
+
+    STDMETHODIMP GetParameters(DWORD *pdwFlags, DWORD *pdwQueue) { return E_NOTIMPL; }
+    STDMETHODIMP Invoke(IMFAsyncResult *pAsyncResult);
+
+  private:
+    long m_cRef;
+  };
+};