1 files changed, 223 insertions, 0 deletions
diff --git a/media/gmp-clearkey/0.1/WMFUtils.cpp b/media/gmp-clearkey/0.1/WMFUtils.cpp
new file mode 100644
index 0000000000..5aa628f619
--- /dev/null
+++ b/media/gmp-clearkey/0.1/WMFUtils.cpp
@@ -0,0 +1,223 @@
+/*
+ * Copyright 2013, Mozilla Foundation and contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "WMFUtils.h"
+
+#define INITGUID
+#include <guiddef.h>
+#include <stdio.h>
+#include <versionhelpers.h>
+
+#include <algorithm>
+
+#include "ClearKeyUtils.h"
+
+#ifndef __MINGW32__
+#  pragma comment(lib, "mfuuid.lib")
+#  pragma comment(lib, "wmcodecdspuuid")
+#endif
+
+void LOG(const char* format, ...) {
+#ifdef WMF_DECODER_LOG
+  va_list args;
+  va_start(args, format);
+  vprintf(format, args);
+#endif
+}
+
+DEFINE_GUID(CLSID_CMSH264DecMFT, 0x62CE7E72, 0x4C71, 0x4d20, 0xB1, 0x5D, 0x45,
+            0x28, 0x31, 0xA8, 0x7D, 0x9D);
+
+namespace wmf {
+
+#define MFPLAT_FUNC(_func, _dllname) decltype(::_func)* _func;
+#include "WMFSymbols.h"
+#undef MFPLAT_FUNC
+
+static bool LinkMfplat() {
+  static bool sInitDone = false;
+  static bool sInitOk = false;
+  if (!sInitDone) {
+    sInitDone = true;
+    HMODULE handle;
+
+#define MFPLAT_FUNC(_func, _dllname)                                  \
+  handle = GetModuleHandleA(_dllname);                                \
+  if (!(_func = (decltype(_func))(GetProcAddress(handle, #_func)))) { \
+    return false;                                                     \
+  }
+
+#include "WMFSymbols.h"
+#undef MFPLAT_FUNC
+    sInitOk = true;
+  }
+  return sInitOk;
+}
+
+bool EnsureLibs() {
+  static bool sInitDone = false;
+  static bool sInitOk = false;
+  if (!sInitDone) {
+    sInitOk = LinkMfplat() && !!GetModuleHandleA(WMFDecoderDllName());
+    sInitDone = true;
+  }
+  return sInitOk;
+}
+
+int32_t MFOffsetToInt32(const MFOffset& aOffset) {
+  return int32_t(aOffset.value + (aOffset.fract / 65536.0f));
+}
+
+// Gets the sub-region of the video frame that should be displayed.
+// See:
+// http://msdn.microsoft.com/en-us/library/windows/desktop/bb530115(v=vs.85).aspx
+HRESULT
+GetPictureRegion(IMFMediaType* aMediaType, IntRect& aOutPictureRegion) {
+  // Determine if "pan and scan" is enabled for this media. If it is, we
+  // only display a region of the video frame, not the entire frame.
+  BOOL panScan =
+      MFGetAttributeUINT32(aMediaType, MF_MT_PAN_SCAN_ENABLED, FALSE);
+
+  // If pan and scan mode is enabled. Try to get the display region.
+  HRESULT hr = E_FAIL;
+  MFVideoArea videoArea;
+  memset(&videoArea, 0, sizeof(MFVideoArea));
+  if (panScan) {
+    hr = aMediaType->GetBlob(MF_MT_PAN_SCAN_APERTURE, (UINT8*)&videoArea,
+                             sizeof(MFVideoArea), NULL);
+  }
+
+  // If we're not in pan-and-scan mode, or the pan-and-scan region is not set,
+  // check for a minimimum display aperture.
+  if (!panScan || hr == MF_E_ATTRIBUTENOTFOUND) {
+    hr = aMediaType->GetBlob(MF_MT_MINIMUM_DISPLAY_APERTURE, (UINT8*)&videoArea,
+                             sizeof(MFVideoArea), NULL);
+  }
+
+  if (hr == MF_E_ATTRIBUTENOTFOUND) {
+    // Minimum display aperture is not set, for "backward compatibility with
+    // some components", check for a geometric aperture.
+    hr = aMediaType->GetBlob(MF_MT_GEOMETRIC_APERTURE, (UINT8*)&videoArea,
+                             sizeof(MFVideoArea), NULL);
+  }
+
+  if (SUCCEEDED(hr)) {
+    // The media specified a picture region, return it.
+    IntRect picture = IntRect(MFOffsetToInt32(videoArea.OffsetX),
+                              MFOffsetToInt32(videoArea.OffsetY),
+                              videoArea.Area.cx, videoArea.Area.cy);
+    ENSURE(picture.width <= mozilla::MAX_VIDEO_WIDTH, E_FAIL);
+    ENSURE(picture.height <= mozilla::MAX_VIDEO_HEIGHT, E_FAIL);
+    aOutPictureRegion = picture;
+    return S_OK;
+  }
+
+  // No picture region defined, fall back to using the entire video area.
+  UINT32 width = 0, height = 0;
+  hr = MFGetAttributeSize(aMediaType, MF_MT_FRAME_SIZE, &width, &height);
+  ENSURE(SUCCEEDED(hr), hr);
+  ENSURE(width <= mozilla::MAX_VIDEO_WIDTH, E_FAIL);
+  ENSURE(height <= mozilla::MAX_VIDEO_HEIGHT, E_FAIL);
+  aOutPictureRegion = IntRect(0, 0, width, height);
+  return S_OK;
+}
+
+HRESULT
+GetDefaultStride(IMFMediaType* aType, uint32_t* aOutStride) {
+  // Try to get the default stride from the media type.
+  UINT32 stride = 0;
+  HRESULT hr = aType->GetUINT32(MF_MT_DEFAULT_STRIDE, &stride);
+  if (SUCCEEDED(hr)) {
+    ENSURE(stride <= mozilla::MAX_VIDEO_WIDTH, E_FAIL);
+    *aOutStride = stride;
+    return S_OK;
+  }
+
+  // Stride attribute not set, calculate it.
+  GUID subtype = GUID_NULL;
+  uint32_t width = 0;
+  uint32_t height = 0;
+
+  hr = aType->GetGUID(MF_MT_SUBTYPE, &subtype);
+  ENSURE(SUCCEEDED(hr), hr);
+
+  hr = MFGetAttributeSize(aType, MF_MT_FRAME_SIZE, &width, &height);
+  ENSURE(SUCCEEDED(hr), hr);
+  ENSURE(width <= mozilla::MAX_VIDEO_WIDTH, E_FAIL);
+  ENSURE(height <= mozilla::MAX_VIDEO_HEIGHT, E_FAIL);
+
+  LONG lstride = 0;
+  hr = MFGetStrideForBitmapInfoHeader(subtype.Data1, width, &lstride);
+  ENSURE(SUCCEEDED(hr), hr);
+  ENSURE(lstride <= mozilla::MAX_VIDEO_WIDTH, E_FAIL);
+  ENSURE(lstride >= 0, E_FAIL);
+  *aOutStride = lstride;
+
+  return hr;
+}
+
+void dump(const uint8_t* data, uint32_t len, const char* filename) {
+  FILE* f = 0;
+  fopen_s(&f, filename, "wb");
+  fwrite(data, len, 1, f);
+  fclose(f);
+}
+
+HRESULT
+CreateMFT(const CLSID& clsid, const char* aDllName,
+          CComPtr<IMFTransform>& aOutMFT) {
+  HMODULE module = ::GetModuleHandleA(aDllName);
+  if (!module) {
+    LOG("Failed to get %S\n", aDllName);
+    return E_FAIL;
+  }
+
+  typedef HRESULT(WINAPI * DllGetClassObjectFnPtr)(
+      const CLSID& clsid, const IID& iid, void** object);
+
+  DllGetClassObjectFnPtr GetClassObjPtr =
+      reinterpret_cast<DllGetClassObjectFnPtr>(
+          GetProcAddress(module, "DllGetClassObject"));
+  if (!GetClassObjPtr) {
+    LOG("Failed to get DllGetClassObject\n");
+    return E_FAIL;
+  }
+
+  CComPtr<IClassFactory> classFactory;
+  HRESULT hr = GetClassObjPtr(
+      clsid, __uuidof(IClassFactory),
+      reinterpret_cast<void**>(static_cast<IClassFactory**>(&classFactory)));
+  if (FAILED(hr)) {
+    LOG("Failed to get H264 IClassFactory\n");
+    return E_FAIL;
+  }
+
+  hr = classFactory->CreateInstance(
+      NULL, __uuidof(IMFTransform),
+      reinterpret_cast<void**>(static_cast<IMFTransform**>(&aOutMFT)));
+  if (FAILED(hr)) {
+    LOG("Failed to get create MFT\n");
+    return E_FAIL;
+  }
+
+  return S_OK;
+}
+
+int32_t GetNumThreads(int32_t aCoreCount) {
+  return aCoreCount > 4 ? -1 : (std::max)(aCoreCount - 1, 1);
+}
+
+}  // namespace wmf