tor-browser

The Tor Browser
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MFPMPHostWrapper.cpp (2876B)

      1 /* This Source Code Form is subject to the terms of the Mozilla Public
      2 * License, v. 2.0. If a copy of the MPL was not distributed with this
      3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      4 
      5 #include "MFPMPHostWrapper.h"
      6 
      7 #include "MFMediaEngineUtils.h"
      8 #include "WMF.h"
      9 #include "mozilla/EMEUtils.h"
     10 
     11 namespace mozilla {
     12 
     13 using Microsoft::WRL::ComPtr;
     14 
     15 #define LOG(msg, ...) EME_LOG("MFPMPHostWrapper=%p, " msg, this, ##__VA_ARGS__)
     16 
     17 HRESULT MFPMPHostWrapper::RuntimeClassInitialize(
     18    Microsoft::WRL::ComPtr<IMFPMPHost>& aHost) {
     19  mPMPHost = aHost;
     20  return S_OK;
     21 }
     22 
     23 MFPMPHostWrapper::MFPMPHostWrapper() {
     24  MOZ_COUNT_CTOR(MFPMPHostWrapper);
     25  LOG("MFPMPHostWrapper created");
     26 }
     27 
     28 MFPMPHostWrapper::~MFPMPHostWrapper() {
     29  MOZ_COUNT_DTOR(MFPMPHostWrapper);
     30  LOG("MFPMPHostWrapper destroyed");
     31 };
     32 
     33 STDMETHODIMP MFPMPHostWrapper::LockProcess() {
     34  LOG("LockProcess");
     35  return mPMPHost->LockProcess();
     36 }
     37 
     38 STDMETHODIMP MFPMPHostWrapper::UnlockProcess() {
     39  LOG("UnlockProcess");
     40  return mPMPHost->UnlockProcess();
     41 }
     42 
     43 STDMETHODIMP MFPMPHostWrapper::ActivateClassById(LPCWSTR aId, IStream* aStream,
     44                                                 REFIID aRiid,
     45                                                 void** aActivatedClass) {
     46  LOG("ActivateClassById, id=%ls", aId);
     47  ComPtr<IMFAttributes> creationAttributes;
     48  RETURN_IF_FAILED(wmf::MFCreateAttributes(&creationAttributes, 2));
     49  RETURN_IF_FAILED(creationAttributes->SetString(GUID_ClassName, aId));
     50 
     51  if (aStream) {
     52    STATSTG statstg;
     53    RETURN_IF_FAILED(
     54        aStream->Stat(&statstg, STATFLAG_NOOPEN | STATFLAG_NONAME));
     55    nsTArray<uint8_t> streamBlob;
     56    streamBlob.SetLength(statstg.cbSize.LowPart);
     57    unsigned long readSize = 0;
     58    RETURN_IF_FAILED(
     59        aStream->Read(&streamBlob[0], streamBlob.Length(), &readSize));
     60    RETURN_IF_FAILED(creationAttributes->SetBlob(GUID_ObjectStream,
     61                                                 &streamBlob[0], readSize));
     62  }
     63 
     64  ComPtr<IStream> outputStream;
     65  RETURN_IF_FAILED(CreateStreamOnHGlobal(nullptr, TRUE, &outputStream));
     66  RETURN_IF_FAILED(wmf::MFSerializeAttributesToStream(creationAttributes.Get(),
     67                                                      0, outputStream.Get()));
     68  RETURN_IF_FAILED(outputStream->Seek({}, STREAM_SEEK_SET, nullptr));
     69 
     70  ComPtr<IMFActivate> activator;
     71  RETURN_IF_FAILED(mPMPHost->CreateObjectByCLSID(
     72      CLSID_EMEStoreActivate, outputStream.Get(), IID_PPV_ARGS(&activator)));
     73  RETURN_IF_FAILED(activator->ActivateObject(aRiid, aActivatedClass));
     74  if (aActivatedClass) {
     75    LOG("Get class %p for id=%ls", *aActivatedClass, aId);
     76  } else {
     77    LOG("No class for id=%ls", aId);
     78  }
     79  LOG("Done ActivateClassById, id=%ls", aId);
     80  return S_OK;
     81 }
     82 
     83 void MFPMPHostWrapper::Shutdown() {
     84  LOG("Shutdown");
     85  if (mPMPHost) {
     86    mPMPHost = nullptr;
     87  }
     88 }
     89 
     90 #undef LOG
     91 
     92 }  // namespace mozilla