Add m-esr52 at 52.6.0

1 files changed, 1016 insertions, 0 deletions

diff --git a/dom/media/platforms/wmf/WMFVideoMFTManager.cpp b/dom/media/platforms/wmf/WMFVideoMFTManager.cpp
new file mode 100644
index 000000000..291bc5b74
--- /dev/null
+++ b/dom/media/platforms/wmf/WMFVideoMFTManager.cpp
@@ -0,0 +1,1016 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <algorithm>
+#include <winsdkver.h>
+#include <psapi.h>
+#include "WMFVideoMFTManager.h"
+#include "MediaDecoderReader.h"
+#include "gfxPrefs.h"
+#include "WMFUtils.h"
+#include "ImageContainer.h"
+#include "VideoUtils.h"
+#include "DXVA2Manager.h"
+#include "nsThreadUtils.h"
+#include "Layers.h"
+#include "mozilla/ClearOnShutdown.h"
+#include "mozilla/layers/LayersTypes.h"
+#include "MediaInfo.h"
+#include "mozilla/Logging.h"
+#include "nsWindowsHelpers.h"
+#include "gfx2DGlue.h"
+#include "gfxWindowsPlatform.h"
+#include "IMFYCbCrImage.h"
+#include "mozilla/WindowsVersion.h"
+#include "mozilla/Telemetry.h"
+#include "nsPrintfCString.h"
+#include "MediaTelemetryConstants.h"
+#include "GMPUtils.h" // For SplitAt. TODO: Move SplitAt to a central place.
+#include "MP4Decoder.h"
+#include "VPXDecoder.h"
+#include "mozilla/SyncRunnable.h"
+
+#define LOG(...) MOZ_LOG(sPDMLog, mozilla::LogLevel::Debug, (__VA_ARGS__))
+
+using mozilla::layers::Image;
+using mozilla::layers::IMFYCbCrImage;
+using mozilla::layers::LayerManager;
+using mozilla::layers::LayersBackend;
+
+#if WINVER_MAXVER < 0x0A00
+// Windows 10+ SDK has VP80 and VP90 defines
+const GUID MFVideoFormat_VP80 =
+{
+  0x30385056,
+  0x0000,
+  0x0010,
+  {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+};
+
+const GUID MFVideoFormat_VP90 =
+{
+  0x30395056,
+  0x0000,
+  0x0010,
+  {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+};
+#endif
+
+const CLSID CLSID_WebmMfVpxDec =
+{
+  0xe3aaf548,
+  0xc9a4,
+  0x4c6e,
+  { 0x23, 0x4d, 0x5a, 0xda, 0x37, 0x4b, 0x00, 0x00 }
+};
+
+namespace mozilla {
+
+LayersBackend
+GetCompositorBackendType(layers::KnowsCompositor* aKnowsCompositor)
+{
+  if (aKnowsCompositor) {
+    return aKnowsCompositor->GetCompositorBackendType();
+  }
+  return LayersBackend::LAYERS_NONE;
+}
+
+WMFVideoMFTManager::WMFVideoMFTManager(
+                            const VideoInfo& aConfig,
+                            layers::KnowsCompositor* aKnowsCompositor,
+                            layers::ImageContainer* aImageContainer,
+                            bool aDXVAEnabled)
+  : mVideoInfo(aConfig)
+  , mVideoStride(0)
+  , mImageSize(aConfig.mImage)
+  , mImageContainer(aImageContainer)
+  , mDXVAEnabled(aDXVAEnabled)
+  , mKnowsCompositor(aKnowsCompositor)
+  , mNullOutputCount(0)
+  , mGotValidOutputAfterNullOutput(false)
+  , mGotExcessiveNullOutput(false)
+  , mIsValid(true)
+  // mVideoStride, mVideoWidth, mVideoHeight, mUseHwAccel are initialized in
+  // Init().
+{
+  MOZ_COUNT_CTOR(WMFVideoMFTManager);
+
+  // Need additional checks/params to check vp8/vp9
+  if (MP4Decoder::IsH264(aConfig.mMimeType)) {
+    mStreamType = H264;
+  } else if (VPXDecoder::IsVP8(aConfig.mMimeType)) {
+    mStreamType = VP8;
+  } else if (VPXDecoder::IsVP9(aConfig.mMimeType)) {
+    mStreamType = VP9;
+  } else {
+    mStreamType = Unknown;
+  }
+}
+
+WMFVideoMFTManager::~WMFVideoMFTManager()
+{
+  MOZ_COUNT_DTOR(WMFVideoMFTManager);
+  // Ensure DXVA/D3D9 related objects are released on the main thread.
+  if (mDXVA2Manager) {
+    DeleteOnMainThread(mDXVA2Manager);
+  }
+
+  // Record whether the video decoder successfully decoded, or output null
+  // samples but did/didn't recover.
+  uint32_t telemetry = (mNullOutputCount == 0) ? 0 :
+                       (mGotValidOutputAfterNullOutput && mGotExcessiveNullOutput) ? 1 :
+                       mGotExcessiveNullOutput ? 2 :
+                       mGotValidOutputAfterNullOutput ? 3 :
+                       4;
+
+  nsCOMPtr<nsIRunnable> task = NS_NewRunnableFunction([=]() -> void {
+    LOG(nsPrintfCString("Reporting telemetry VIDEO_MFT_OUTPUT_NULL_SAMPLES=%d", telemetry).get());
+    Telemetry::Accumulate(Telemetry::ID::VIDEO_MFT_OUTPUT_NULL_SAMPLES, telemetry);
+  });
+  AbstractThread::MainThread()->Dispatch(task.forget());
+}
+
+const GUID&
+WMFVideoMFTManager::GetMFTGUID()
+{
+  MOZ_ASSERT(mStreamType != Unknown);
+  switch (mStreamType) {
+    case H264: return CLSID_CMSH264DecoderMFT;
+    case VP8: return CLSID_WebmMfVpxDec;
+    case VP9: return CLSID_WebmMfVpxDec;
+    default: return GUID_NULL;
+  };
+}
+
+const GUID&
+WMFVideoMFTManager::GetMediaSubtypeGUID()
+{
+  MOZ_ASSERT(mStreamType != Unknown);
+  switch (mStreamType) {
+    case H264: return MFVideoFormat_H264;
+    case VP8: return MFVideoFormat_VP80;
+    case VP9: return MFVideoFormat_VP90;
+    default: return GUID_NULL;
+  };
+}
+
+struct D3DDLLBlacklistingCache
+{
+  // Blacklist pref value last seen.
+  nsCString mBlacklistPref;
+  // Non-empty if a blacklisted DLL was found.
+  nsCString mBlacklistedDLL;
+};
+StaticAutoPtr<D3DDLLBlacklistingCache> sD3D11BlacklistingCache;
+StaticAutoPtr<D3DDLLBlacklistingCache> sD3D9BlacklistingCache;
+
+// If a blacklisted DLL is found, return its information, otherwise "".
+static const nsCString&
+FindDXVABlacklistedDLL(StaticAutoPtr<D3DDLLBlacklistingCache>& aDLLBlacklistingCache,
+                       const nsCString& aBlacklist,
+                       const char* aDLLBlacklistPrefName)
+{
+  NS_ASSERTION(NS_IsMainThread(), "Must be on main thread.");
+
+  if (!aDLLBlacklistingCache) {
+    // First time here, create persistent data that will be reused in all
+    // D3D11-blacklisting checks.
+    aDLLBlacklistingCache = new D3DDLLBlacklistingCache();
+    ClearOnShutdown(&aDLLBlacklistingCache);
+  }
+
+  if (aBlacklist.IsEmpty()) {
+    // Empty blacklist -> No blacklisting.
+    aDLLBlacklistingCache->mBlacklistPref.SetLength(0);
+    aDLLBlacklistingCache->mBlacklistedDLL.SetLength(0);
+    return aDLLBlacklistingCache->mBlacklistedDLL;
+  }
+
+  // Detect changes in pref.
+  if (aDLLBlacklistingCache->mBlacklistPref.Equals(aBlacklist)) {
+    // Same blacklist -> Return same result (i.e., don't check DLLs again).
+    return aDLLBlacklistingCache->mBlacklistedDLL;
+  }
+  // Adopt new pref now, so we don't work on it again.
+  aDLLBlacklistingCache->mBlacklistPref = aBlacklist;
+
+  HANDLE hProcess = GetCurrentProcess();
+  mozilla::UniquePtr<HMODULE[]> hMods;
+  unsigned int modulesNum = 0;
+  if (hProcess != NULL) {
+    DWORD modulesSize;
+    EnumProcessModules(hProcess, nullptr, 0, &modulesSize);
+    modulesNum = modulesSize / sizeof(HMODULE);
+    hMods = mozilla::MakeUnique<HMODULE[]>(modulesNum);
+    EnumProcessModules(hProcess, hMods.get(), modulesNum * sizeof(HMODULE), &modulesSize);
+  }
+
+  // media.wmf.disable-d3d*-for-dlls format: (whitespace is trimmed)
+  // "dll1.dll: 1.2.3.4[, more versions...][; more dlls...]"
+  nsTArray<nsCString> dlls;
+  SplitAt(";", aBlacklist, dlls);
+  for (const auto& dll : dlls) {
+    nsTArray<nsCString> nameAndVersions;
+    SplitAt(":", dll, nameAndVersions);
+    if (nameAndVersions.Length() != 2) {
+      NS_WARNING(nsPrintfCString("Skipping incorrect '%s' dll:versions format",
+                                 aDLLBlacklistPrefName).get());
+      continue;
+    }
+
+    nameAndVersions[0].CompressWhitespace();
+    NS_ConvertUTF8toUTF16 name(nameAndVersions[0]);
+
+    for (unsigned int i = 0; i <= modulesNum; i++) {
+      WCHAR dllPath[MAX_PATH + 1];
+
+      if (i < modulesNum) {
+        if (!GetModuleFileNameEx(hProcess, hMods[i], dllPath, sizeof(dllPath) / sizeof(WCHAR))) {
+          continue;
+        }
+
+        nsCOMPtr<nsIFile> file;
+        if (NS_WARN_IF(NS_FAILED(NS_NewLocalFile(nsDependentString(dllPath), false, getter_AddRefs(file))))) {
+          continue;
+        }
+
+        nsAutoString leafName;
+        if (NS_WARN_IF(NS_FAILED(file->GetLeafName(leafName)))) {
+          continue;
+        }
+
+        if (_wcsicmp(leafName.get(), name.get())) {
+          continue;
+        }
+      } else {
+        if (!ConstructSystem32Path(name.get(), dllPath, MAX_PATH + 1)) {
+          // Cannot build path -> Assume it's not the blacklisted DLL.
+          continue;
+        }
+      }
+
+      DWORD zero;
+      DWORD infoSize = GetFileVersionInfoSizeW(dllPath, &zero);
+      if (infoSize == 0) {
+        // Can't get file info -> Assume we don't have the blacklisted DLL.
+        continue;
+      }
+      // vInfo is a pointer into infoData, that's why we keep it outside of the loop.
+      auto infoData = MakeUnique<unsigned char[]>(infoSize);
+      VS_FIXEDFILEINFO *vInfo;
+      UINT vInfoLen;
+      if (!GetFileVersionInfoW(dllPath, 0, infoSize, infoData.get())
+          || !VerQueryValueW(infoData.get(), L"\\", (LPVOID*)&vInfo, &vInfoLen)
+          || !vInfo) {
+        // Can't find version -> Assume it's not blacklisted.
+        continue;
+      }
+
+      nsTArray<nsCString> versions;
+      SplitAt(",", nameAndVersions[1], versions);
+      for (const auto& version : versions) {
+        nsTArray<nsCString> numberStrings;
+        SplitAt(".", version, numberStrings);
+        if (numberStrings.Length() != 4) {
+          NS_WARNING(nsPrintfCString("Skipping incorrect '%s' a.b.c.d version format",
+                                     aDLLBlacklistPrefName).get());
+          continue;
+        }
+        DWORD numbers[4];
+        nsresult errorCode = NS_OK;
+        for (int i = 0; i < 4; ++i) {
+          numberStrings[i].CompressWhitespace();
+          numbers[i] = DWORD(numberStrings[i].ToInteger(&errorCode));
+          if (NS_FAILED(errorCode)) {
+            break;
+          }
+          if (numbers[i] > UINT16_MAX) {
+            errorCode = NS_ERROR_FAILURE;
+            break;
+          }
+        }
+
+        if (NS_FAILED(errorCode)) {
+          NS_WARNING(nsPrintfCString("Skipping incorrect '%s' a.b.c.d version format",
+                                     aDLLBlacklistPrefName).get());
+          continue;
+        }
+
+        if (vInfo->dwFileVersionMS == ((numbers[0] << 16) | numbers[1])
+            && vInfo->dwFileVersionLS == ((numbers[2] << 16) | numbers[3])) {
+          // Blacklisted! Record bad DLL.
+          aDLLBlacklistingCache->mBlacklistedDLL.SetLength(0);
+          aDLLBlacklistingCache->mBlacklistedDLL.AppendPrintf(
+            "%s (%lu.%lu.%lu.%lu)",
+            nameAndVersions[0].get(), numbers[0], numbers[1], numbers[2], numbers[3]);
+          return aDLLBlacklistingCache->mBlacklistedDLL;
+        }
+      }
+    }
+  }
+
+  // No blacklisted DLL.
+  aDLLBlacklistingCache->mBlacklistedDLL.SetLength(0);
+  return aDLLBlacklistingCache->mBlacklistedDLL;
+}
+
+static const nsCString&
+FindD3D11BlacklistedDLL() {
+  return FindDXVABlacklistedDLL(sD3D11BlacklistingCache,
+                                gfx::gfxVars::PDMWMFDisableD3D11Dlls(),
+                                "media.wmf.disable-d3d11-for-dlls");
+}
+
+static const nsCString&
+FindD3D9BlacklistedDLL() {
+  return FindDXVABlacklistedDLL(sD3D9BlacklistingCache,
+                                gfx::gfxVars::PDMWMFDisableD3D9Dlls(),
+                                "media.wmf.disable-d3d9-for-dlls");
+}
+
+class CreateDXVAManagerEvent : public Runnable {
+public:
+  CreateDXVAManagerEvent(LayersBackend aBackend,
+                         layers::KnowsCompositor* aKnowsCompositor,
+                         nsCString& aFailureReason)
+    : mBackend(aBackend)
+    , mKnowsCompositor(aKnowsCompositor)
+    , mFailureReason(aFailureReason)
+  {}
+
+  NS_IMETHOD Run() override {
+    NS_ASSERTION(NS_IsMainThread(), "Must be on main thread.");
+    nsACString* failureReason = &mFailureReason;
+    nsCString secondFailureReason;
+    if (mBackend == LayersBackend::LAYERS_D3D11 &&
+      gfxPrefs::PDMWMFAllowD3D11() && IsWin8OrLater()) {
+      const nsCString& blacklistedDLL = FindD3D11BlacklistedDLL();
+      if (!blacklistedDLL.IsEmpty()) {
+        failureReason->AppendPrintf("D3D11 blacklisted with DLL %s",
+                                    blacklistedDLL.get());
+      } else {
+        mDXVA2Manager = DXVA2Manager::CreateD3D11DXVA(mKnowsCompositor, *failureReason);
+        if (mDXVA2Manager) {
+          return NS_OK;
+        }
+      }
+      // Try again with d3d9, but record the failure reason
+      // into a new var to avoid overwriting the d3d11 failure.
+      failureReason = &secondFailureReason;
+      mFailureReason.Append(NS_LITERAL_CSTRING("; "));
+    }
+
+    const nsCString& blacklistedDLL = FindD3D9BlacklistedDLL();
+    if (!blacklistedDLL.IsEmpty()) {
+      mFailureReason.AppendPrintf("D3D9 blacklisted with DLL %s",
+                                  blacklistedDLL.get());
+    } else {
+      mDXVA2Manager = DXVA2Manager::CreateD3D9DXVA(mKnowsCompositor, *failureReason);
+      // Make sure we include the messages from both attempts (if applicable).
+      mFailureReason.Append(secondFailureReason);
+    }
+    return NS_OK;
+  }
+  nsAutoPtr<DXVA2Manager> mDXVA2Manager;
+  layers::LayersBackend mBackend;
+  KnowsCompositor* mKnowsCompositor;
+  nsACString& mFailureReason;
+};
+
+bool
+WMFVideoMFTManager::InitializeDXVA(bool aForceD3D9)
+{
+  // If we use DXVA but aren't running with a D3D layer manager then the
+  // readback of decoded video frames from GPU to CPU memory grinds painting
+  // to a halt, and makes playback performance *worse*.
+  if (!mDXVAEnabled) {
+    mDXVAFailureReason.AssignLiteral("Hardware video decoding disabled or blacklisted");
+    return false;
+  }
+  MOZ_ASSERT(!mDXVA2Manager);
+  LayersBackend backend = GetCompositorBackendType(mKnowsCompositor);
+  if (backend != LayersBackend::LAYERS_D3D9 &&
+      backend != LayersBackend::LAYERS_D3D11) {
+    mDXVAFailureReason.AssignLiteral("Unsupported layers backend");
+    return false;
+  }
+
+  // The DXVA manager must be created on the main thread.
+  RefPtr<CreateDXVAManagerEvent> event =
+    new CreateDXVAManagerEvent(aForceD3D9 ? LayersBackend::LAYERS_D3D9
+                                          : backend,
+                               mKnowsCompositor,
+                               mDXVAFailureReason);
+
+  if (NS_IsMainThread()) {
+    event->Run();
+  } else {
+    // This logic needs to run on the main thread
+    nsCOMPtr<nsIThread> mainThread = do_GetMainThread();
+    mozilla::SyncRunnable::DispatchToThread(mainThread, event);
+  }
+  mDXVA2Manager = event->mDXVA2Manager;
+
+  return mDXVA2Manager != nullptr;
+}
+
+bool
+WMFVideoMFTManager::ValidateVideoInfo()
+{
+  // The WMF H.264 decoder is documented to have a minimum resolution
+  // 48x48 pixels. We've observed the decoder working for output smaller than
+  // that, but on some output it hangs in IMFTransform::ProcessOutput(), so
+  // we just reject streams which are less than the documented minimum.
+  // https://msdn.microsoft.com/en-us/library/windows/desktop/dd797815(v=vs.85).aspx
+  static const int32_t MIN_H264_FRAME_DIMENSION = 48;
+  if (mStreamType == H264 &&
+      (mVideoInfo.mImage.width < MIN_H264_FRAME_DIMENSION ||
+       mVideoInfo.mImage.height < MIN_H264_FRAME_DIMENSION)) {
+    LogToBrowserConsole(NS_LITERAL_STRING(
+      "Can't decode H.264 stream with width or height less than 48 pixels."));
+    mIsValid = false;
+  }
+
+  return mIsValid;
+}
+
+bool
+WMFVideoMFTManager::Init()
+{
+  if (!ValidateVideoInfo()) {
+    return false;
+  }
+
+  bool success = InitInternal(/* aForceD3D9 = */ false);
+
+  if (success && mDXVA2Manager) {
+    // If we had some failures but eventually made it work,
+    // make sure we preserve the messages.
+    if (mDXVA2Manager->IsD3D11()) {
+      mDXVAFailureReason.Append(NS_LITERAL_CSTRING("Using D3D11 API"));
+    } else {
+      mDXVAFailureReason.Append(NS_LITERAL_CSTRING("Using D3D9 API"));
+    }
+  }
+
+  return success;
+}
+
+bool
+WMFVideoMFTManager::InitInternal(bool aForceD3D9)
+{
+  mUseHwAccel = false; // default value; changed if D3D setup succeeds.
+  bool useDxva = InitializeDXVA(aForceD3D9);
+
+  RefPtr<MFTDecoder> decoder(new MFTDecoder());
+
+  HRESULT hr = decoder->Create(GetMFTGUID());
+  NS_ENSURE_TRUE(SUCCEEDED(hr), false);
+
+  RefPtr<IMFAttributes> attr(decoder->GetAttributes());
+  UINT32 aware = 0;
+  if (attr) {
+    attr->GetUINT32(MF_SA_D3D_AWARE, &aware);
+    attr->SetUINT32(CODECAPI_AVDecNumWorkerThreads,
+      WMFDecoderModule::GetNumDecoderThreads());
+    if (gfxPrefs::PDMWMFLowLatencyEnabled()) {
+      hr = attr->SetUINT32(CODECAPI_AVLowLatencyMode, TRUE);
+      if (SUCCEEDED(hr)) {
+        LOG("Enabling Low Latency Mode");
+      } else {
+        LOG("Couldn't enable Low Latency Mode");
+      }
+    }
+  }
+
+  if (useDxva) {
+    if (aware) {
+      // TODO: Test if I need this anywhere... Maybe on Vista?
+      //hr = attr->SetUINT32(CODECAPI_AVDecVideoAcceleration_H264, TRUE);
+      //NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+      MOZ_ASSERT(mDXVA2Manager);
+      ULONG_PTR manager = ULONG_PTR(mDXVA2Manager->GetDXVADeviceManager());
+      hr = decoder->SendMFTMessage(MFT_MESSAGE_SET_D3D_MANAGER, manager);
+      if (SUCCEEDED(hr)) {
+        mUseHwAccel = true;
+      } else {
+        DeleteOnMainThread(mDXVA2Manager);
+        mDXVAFailureReason = nsPrintfCString("MFT_MESSAGE_SET_D3D_MANAGER failed with code %X", hr);
+      }
+    }
+    else {
+      mDXVAFailureReason.AssignLiteral("Decoder returned false for MF_SA_D3D_AWARE");
+    }
+  }
+
+  if (!mUseHwAccel) {
+    // Use VP8/9 MFT only if HW acceleration is available
+    if (mStreamType == VP9 || mStreamType == VP8) {
+      return false;
+    }
+    Telemetry::Accumulate(Telemetry::MEDIA_DECODER_BACKEND_USED,
+                          uint32_t(media::MediaDecoderBackend::WMFSoftware));
+  }
+
+  mDecoder = decoder;
+  hr = SetDecoderMediaTypes();
+  NS_ENSURE_TRUE(SUCCEEDED(hr), false);
+
+  LOG("Video Decoder initialized, Using DXVA: %s", (mUseHwAccel ? "Yes" : "No"));
+
+  return true;
+}
+
+HRESULT
+WMFVideoMFTManager::SetDecoderMediaTypes()
+{
+  // Setup the input/output media types.
+  RefPtr<IMFMediaType> inputType;
+  HRESULT hr = wmf::MFCreateMediaType(getter_AddRefs(inputType));
+  NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+
+  hr = inputType->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Video);
+  NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+
+  hr = inputType->SetGUID(MF_MT_SUBTYPE, GetMediaSubtypeGUID());
+  NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+
+  hr = inputType->SetUINT32(MF_MT_INTERLACE_MODE, MFVideoInterlace_MixedInterlaceOrProgressive);
+  NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+
+  // MSFT MFT needs this frame size set for VP9?
+  if (mStreamType == VP9 || mStreamType == VP8) {
+    hr = inputType->SetUINT32(MF_MT_INTERLACE_MODE, MFVideoInterlace_Progressive);
+    NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+
+    hr = MFSetAttributeSize(inputType, MF_MT_FRAME_SIZE, mVideoInfo.ImageRect().width, mVideoInfo.ImageRect().height);
+    NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+  }
+
+  RefPtr<IMFMediaType> outputType;
+  hr = wmf::MFCreateMediaType(getter_AddRefs(outputType));
+  NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+
+  hr = outputType->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Video);
+  NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+
+  GUID outputSubType = mUseHwAccel ? MFVideoFormat_NV12 : MFVideoFormat_YV12;
+  hr = outputType->SetGUID(MF_MT_SUBTYPE, outputSubType);
+  NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+
+  return mDecoder->SetMediaTypes(inputType, outputType);
+}
+
+HRESULT
+WMFVideoMFTManager::Input(MediaRawData* aSample)
+{
+  if (!mIsValid) {
+    return E_FAIL;
+  }
+
+  if (!mDecoder) {
+    // This can happen during shutdown.
+    return E_FAIL;
+  }
+
+  HRESULT hr = mDecoder->CreateInputSample(aSample->Data(),
+                                           uint32_t(aSample->Size()),
+                                           aSample->mTime,
+                                           &mLastInput);
+  NS_ENSURE_TRUE(SUCCEEDED(hr) && mLastInput != nullptr, hr);
+
+  mLastDuration = aSample->mDuration;
+  mLastTime = aSample->mTime;
+  mSamplesCount++;
+
+  // Forward sample data to the decoder.
+  return mDecoder->Input(mLastInput);
+}
+
+class SupportsConfigEvent : public Runnable {
+public:
+  SupportsConfigEvent(DXVA2Manager* aDXVA2Manager, IMFMediaType* aMediaType, float aFramerate)
+    : mDXVA2Manager(aDXVA2Manager)
+    , mMediaType(aMediaType)
+    , mFramerate(aFramerate)
+    , mSupportsConfig(false)
+  {}
+
+  NS_IMETHOD Run() {
+    MOZ_ASSERT(NS_IsMainThread(), "Must be on main thread.");
+    mSupportsConfig = mDXVA2Manager->SupportsConfig(mMediaType, mFramerate);
+    return NS_OK;
+  }
+  DXVA2Manager* mDXVA2Manager;
+  IMFMediaType* mMediaType;
+  float mFramerate;
+  bool mSupportsConfig;
+};
+
+// The MFTransform we use for decoding h264 video will silently fall
+// back to software decoding (even if we've negotiated DXVA) if the GPU
+// doesn't support decoding the given resolution. It will then upload
+// the software decoded frames into d3d textures to preserve behaviour.
+//
+// Unfortunately this seems to cause corruption (see bug 1193547) and is
+// slow because the upload is done into a non-shareable texture and requires
+// us to copy it.
+//
+// This code tests if the given resolution can be supported directly on the GPU,
+// and makes sure we only ask the MFT for DXVA if it can be supported properly.
+//
+// Ideally we'd know the framerate during initialization and would also ensure
+// that new decoders are created if the resolution changes. Then we could move
+// this check into Init and consolidate the main thread blocking code.
+bool
+WMFVideoMFTManager::CanUseDXVA(IMFMediaType* aType)
+{
+  MOZ_ASSERT(mDXVA2Manager);
+  // SupportsConfig only checks for valid h264 decoders currently.
+  if (mStreamType != H264) {
+    return true;
+  }
+
+  // Assume the current samples duration is representative for the
+  // entire video.
+  float framerate = 1000000.0 / mLastDuration;
+
+  // The supports config check must be done on the main thread since we have
+  // a crash guard protecting it.
+  RefPtr<SupportsConfigEvent> event =
+    new SupportsConfigEvent(mDXVA2Manager, aType, framerate);
+
+  if (NS_IsMainThread()) {
+    event->Run();
+  } else {
+    // This logic needs to run on the main thread
+    nsCOMPtr<nsIThread> mainThread = do_GetMainThread();
+    mozilla::SyncRunnable::DispatchToThread(mainThread, event);
+  }
+
+  return event->mSupportsConfig;
+}
+
+HRESULT
+WMFVideoMFTManager::ConfigureVideoFrameGeometry()
+{
+  RefPtr<IMFMediaType> mediaType;
+  HRESULT hr = mDecoder->GetOutputMediaType(mediaType);
+  NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+
+  // If we enabled/disabled DXVA in response to a resolution
+  // change then we need to renegotiate our media types,
+  // and resubmit our previous frame (since the MFT appears
+  // to lose it otherwise).
+  if (mUseHwAccel && !CanUseDXVA(mediaType)) {
+    mDXVAEnabled = false;
+    if (!Init()) {
+      return E_FAIL;
+    }
+
+    mDecoder->Input(mLastInput);
+    return S_OK;
+  }
+
+  // Verify that the video subtype is what we expect it to be.
+  // When using hardware acceleration/DXVA2 the video format should
+  // be NV12, which is DXVA2's preferred format. For software decoding
+  // we use YV12, as that's easier for us to stick into our rendering
+  // pipeline than NV12. NV12 has interleaved UV samples, whereas YV12
+  // is a planar format.
+  GUID videoFormat;
+  hr = mediaType->GetGUID(MF_MT_SUBTYPE, &videoFormat);
+  NS_ENSURE_TRUE(videoFormat == MFVideoFormat_NV12 || !mUseHwAccel, E_FAIL);
+  NS_ENSURE_TRUE(videoFormat == MFVideoFormat_YV12 || mUseHwAccel, E_FAIL);
+
+  nsIntRect pictureRegion;
+  hr = GetPictureRegion(mediaType, pictureRegion);
+  NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+
+  UINT32 width = pictureRegion.width;
+  UINT32 height = pictureRegion.height;
+  mImageSize = nsIntSize(width, height);
+  // Calculate and validate the picture region and frame dimensions after
+  // scaling by the pixel aspect ratio.
+  pictureRegion = mVideoInfo.ScaledImageRect(width, height);
+  if (!IsValidVideoRegion(mImageSize, pictureRegion, mVideoInfo.mDisplay)) {
+    // Video track's frame sizes will overflow. Ignore the video track.
+    return E_FAIL;
+  }
+
+  if (mDXVA2Manager) {
+    hr = mDXVA2Manager->ConfigureForSize(width, height);
+    NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+  }
+
+  // Success! Save state.
+  GetDefaultStride(mediaType, width, &mVideoStride);
+
+  LOG("WMFVideoMFTManager frame geometry frame=(%u,%u) stride=%u picture=(%d, %d, %d, %d) display=(%d,%d)",
+      width, height,
+      mVideoStride,
+      pictureRegion.x, pictureRegion.y, pictureRegion.width, pictureRegion.height,
+      mVideoInfo.mDisplay.width, mVideoInfo.mDisplay.height);
+
+  return S_OK;
+}
+
+HRESULT
+WMFVideoMFTManager::CreateBasicVideoFrame(IMFSample* aSample,
+                                          int64_t aStreamOffset,
+                                          VideoData** aOutVideoData)
+{
+  NS_ENSURE_TRUE(aSample, E_POINTER);
+  NS_ENSURE_TRUE(aOutVideoData, E_POINTER);
+
+  *aOutVideoData = nullptr;
+
+  HRESULT hr;
+  RefPtr<IMFMediaBuffer> buffer;
+
+  // Must convert to contiguous buffer to use IMD2DBuffer interface.
+  hr = aSample->ConvertToContiguousBuffer(getter_AddRefs(buffer));
+  NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+
+  // Try and use the IMF2DBuffer interface if available, otherwise fallback
+  // to the IMFMediaBuffer interface. Apparently IMF2DBuffer is more efficient,
+  // but only some systems (Windows 8?) support it.
+  BYTE* data = nullptr;
+  LONG stride = 0;
+  RefPtr<IMF2DBuffer> twoDBuffer;
+  hr = buffer->QueryInterface(static_cast<IMF2DBuffer**>(getter_AddRefs(twoDBuffer)));
+  if (SUCCEEDED(hr)) {
+    hr = twoDBuffer->Lock2D(&data, &stride);
+    NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+  } else {
+    hr = buffer->Lock(&data, nullptr, nullptr);
+    NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+    stride = mVideoStride;
+  }
+
+  // YV12, planar format: [YYYY....][VVVV....][UUUU....]
+  // i.e., Y, then V, then U.
+  VideoData::YCbCrBuffer b;
+
+  uint32_t videoWidth = mImageSize.width;
+  uint32_t videoHeight = mImageSize.height;
+
+  // Y (Y') plane
+  b.mPlanes[0].mData = data;
+  b.mPlanes[0].mStride = stride;
+  b.mPlanes[0].mHeight = videoHeight;
+  b.mPlanes[0].mWidth = videoWidth;
+  b.mPlanes[0].mOffset = 0;
+  b.mPlanes[0].mSkip = 0;
+
+  // The V and U planes are stored 16-row-aligned, so we need to add padding
+  // to the row heights to ensure the Y'CbCr planes are referenced properly.
+  uint32_t padding = 0;
+  if (videoHeight % 16 != 0) {
+    padding = 16 - (videoHeight % 16);
+  }
+  uint32_t y_size = stride * (videoHeight + padding);
+  uint32_t v_size = stride * (videoHeight + padding) / 4;
+  uint32_t halfStride = (stride + 1) / 2;
+  uint32_t halfHeight = (videoHeight + 1) / 2;
+  uint32_t halfWidth = (videoWidth + 1) / 2;
+
+  // U plane (Cb)
+  b.mPlanes[1].mData = data + y_size + v_size;
+  b.mPlanes[1].mStride = halfStride;
+  b.mPlanes[1].mHeight = halfHeight;
+  b.mPlanes[1].mWidth = halfWidth;
+  b.mPlanes[1].mOffset = 0;
+  b.mPlanes[1].mSkip = 0;
+
+  // V plane (Cr)
+  b.mPlanes[2].mData = data + y_size;
+  b.mPlanes[2].mStride = halfStride;
+  b.mPlanes[2].mHeight = halfHeight;
+  b.mPlanes[2].mWidth = halfWidth;
+  b.mPlanes[2].mOffset = 0;
+  b.mPlanes[2].mSkip = 0;
+
+  media::TimeUnit pts = GetSampleTime(aSample);
+  NS_ENSURE_TRUE(pts.IsValid(), E_FAIL);
+  media::TimeUnit duration = GetSampleDuration(aSample);
+  NS_ENSURE_TRUE(duration.IsValid(), E_FAIL);
+  nsIntRect pictureRegion = mVideoInfo.ScaledImageRect(videoWidth, videoHeight);
+
+  LayersBackend backend = GetCompositorBackendType(mKnowsCompositor);
+  if (backend != LayersBackend::LAYERS_D3D9 &&
+      backend != LayersBackend::LAYERS_D3D11) {
+    RefPtr<VideoData> v =
+      VideoData::CreateAndCopyData(mVideoInfo,
+                                   mImageContainer,
+                                   aStreamOffset,
+                                   pts.ToMicroseconds(),
+                                   duration.ToMicroseconds(),
+                                   b,
+                                   false,
+                                   -1,
+                                   pictureRegion);
+    if (twoDBuffer) {
+      twoDBuffer->Unlock2D();
+    } else {
+      buffer->Unlock();
+    }
+    v.forget(aOutVideoData);
+    return S_OK;
+  }
+
+  RefPtr<layers::PlanarYCbCrImage> image =
+    new IMFYCbCrImage(buffer, twoDBuffer);
+
+  VideoData::SetVideoDataToImage(image,
+                                 mVideoInfo,
+                                 b,
+                                 pictureRegion,
+                                 false);
+
+  RefPtr<VideoData> v =
+    VideoData::CreateFromImage(mVideoInfo,
+                               aStreamOffset,
+                               pts.ToMicroseconds(),
+                               duration.ToMicroseconds(),
+                               image.forget(),
+                               false,
+                               -1,
+                               pictureRegion);
+
+  v.forget(aOutVideoData);
+  return S_OK;
+}
+
+HRESULT
+WMFVideoMFTManager::CreateD3DVideoFrame(IMFSample* aSample,
+                                        int64_t aStreamOffset,
+                                        VideoData** aOutVideoData)
+{
+  NS_ENSURE_TRUE(aSample, E_POINTER);
+  NS_ENSURE_TRUE(aOutVideoData, E_POINTER);
+  NS_ENSURE_TRUE(mDXVA2Manager, E_ABORT);
+  NS_ENSURE_TRUE(mUseHwAccel, E_ABORT);
+
+  *aOutVideoData = nullptr;
+  HRESULT hr;
+
+  nsIntRect pictureRegion =
+    mVideoInfo.ScaledImageRect(mImageSize.width, mImageSize.height);
+  RefPtr<Image> image;
+  hr = mDXVA2Manager->CopyToImage(aSample,
+                                  pictureRegion,
+                                  getter_AddRefs(image));
+  NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+  NS_ENSURE_TRUE(image, E_FAIL);
+
+  media::TimeUnit pts = GetSampleTime(aSample);
+  NS_ENSURE_TRUE(pts.IsValid(), E_FAIL);
+  media::TimeUnit duration = GetSampleDuration(aSample);
+  NS_ENSURE_TRUE(duration.IsValid(), E_FAIL);
+  RefPtr<VideoData> v = VideoData::CreateFromImage(mVideoInfo,
+                                                   aStreamOffset,
+                                                   pts.ToMicroseconds(),
+                                                   duration.ToMicroseconds(),
+                                                   image.forget(),
+                                                   false,
+                                                   -1,
+                                                   pictureRegion);
+
+  NS_ENSURE_TRUE(v, E_FAIL);
+  v.forget(aOutVideoData);
+
+  return S_OK;
+}
+
+// Blocks until decoded sample is produced by the deoder.
+HRESULT
+WMFVideoMFTManager::Output(int64_t aStreamOffset,
+                           RefPtr<MediaData>& aOutData)
+{
+  RefPtr<IMFSample> sample;
+  HRESULT hr;
+  aOutData = nullptr;
+  int typeChangeCount = 0;
+  bool wasDraining = mDraining;
+  int64_t sampleCount = mSamplesCount;
+  if (wasDraining) {
+    mSamplesCount = 0;
+    mDraining = false;
+  }
+
+  media::TimeUnit pts;
+  media::TimeUnit duration;
+
+  // Loop until we decode a sample, or an unexpected error that we can't
+  // handle occurs.
+  while (true) {
+    hr = mDecoder->Output(&sample);
+    if (hr == MF_E_TRANSFORM_NEED_MORE_INPUT) {
+      return MF_E_TRANSFORM_NEED_MORE_INPUT;
+    }
+    if (hr == MF_E_TRANSFORM_STREAM_CHANGE) {
+      // Video stream output type change. Probably a geometric apperature
+      // change. Reconfigure the video geometry, so that we output the
+      // correct size frames.
+      MOZ_ASSERT(!sample);
+      hr = ConfigureVideoFrameGeometry();
+      NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+      // Catch infinite loops, but some decoders perform at least 2 stream
+      // changes on consecutive calls, so be permissive.
+      // 100 is arbitrarily > 2.
+      NS_ENSURE_TRUE(typeChangeCount < 100, MF_E_TRANSFORM_STREAM_CHANGE);
+      // Loop back and try decoding again...
+      ++typeChangeCount;
+      continue;
+    }
+    if (SUCCEEDED(hr)) {
+      if (!sample) {
+        LOG("Video MFTDecoder returned success but no output!");
+        // On some machines/input the MFT returns success but doesn't output
+        // a video frame. If we detect this, try again, but only up to a
+        // point; after 250 failures, give up. Note we count all failures
+        // over the life of the decoder, as we may end up exiting with a
+        // NEED_MORE_INPUT and coming back to hit the same error. So just
+        // counting with a local variable (like typeChangeCount does) may
+        // not work in this situation.
+        ++mNullOutputCount;
+        if (mNullOutputCount > 250) {
+          LOG("Excessive Video MFTDecoder returning success but no output; giving up");
+          mGotExcessiveNullOutput = true;
+          return E_FAIL;
+        }
+        continue;
+      }
+      pts = GetSampleTime(sample);
+      duration = GetSampleDuration(sample);
+      if (!pts.IsValid() || !duration.IsValid()) {
+        return E_FAIL;
+      }
+      if (wasDraining && sampleCount == 1 && pts == media::TimeUnit()) {
+        // WMF is unable to calculate a duration if only a single sample
+        // was parsed. Additionally, the pts always comes out at 0 under those
+        // circumstances.
+        // Seeing that we've only fed the decoder a single frame, the pts
+        // and duration are known, it's of the last sample.
+        pts = media::TimeUnit::FromMicroseconds(mLastTime);
+        duration = media::TimeUnit::FromMicroseconds(mLastDuration);
+      }
+      if (mSeekTargetThreshold.isSome()) {
+        if ((pts + duration) < mSeekTargetThreshold.ref()) {
+          LOG("Dropping video frame which pts is smaller than seek target.");
+          // It is necessary to clear the pointer to release the previous output
+          // buffer.
+          sample = nullptr;
+          continue;
+        }
+        mSeekTargetThreshold.reset();
+      }
+      break;
+    }
+    // Else unexpected error, assert, and bail.
+    NS_WARNING("WMFVideoMFTManager::Output() unexpected error");
+    return hr;
+  }
+
+  RefPtr<VideoData> frame;
+  if (mUseHwAccel) {
+    hr = CreateD3DVideoFrame(sample, aStreamOffset, getter_AddRefs(frame));
+  } else {
+    hr = CreateBasicVideoFrame(sample, aStreamOffset, getter_AddRefs(frame));
+  }
+  // Frame should be non null only when we succeeded.
+  MOZ_ASSERT((frame != nullptr) == SUCCEEDED(hr));
+  NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+  NS_ENSURE_TRUE(frame, E_FAIL);
+
+  aOutData = frame;
+  // Set the potentially corrected pts and duration.
+  aOutData->mTime = pts.ToMicroseconds();
+  aOutData->mDuration = duration.ToMicroseconds();
+
+  if (mNullOutputCount) {
+    mGotValidOutputAfterNullOutput = true;
+  }
+
+  return S_OK;
+}
+
+void
+WMFVideoMFTManager::Shutdown()
+{
+  mDecoder = nullptr;
+  DeleteOnMainThread(mDXVA2Manager);
+}
+
+bool
+WMFVideoMFTManager::IsHardwareAccelerated(nsACString& aFailureReason) const
+{
+  aFailureReason = mDXVAFailureReason;
+  return mDecoder && mUseHwAccel;
+}
+
+} // namespace mozilla