The Tor Browser: content/media/wmf/WMFByteStream.cpp@97036ab72558 (annotated)

content/media/wmf/WMFByteStream.cpp@97036ab72558 (annotated)

content/media/wmf/WMFByteStream.cpp

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* -*- 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 "WMF.h"
 #include <unknwn.h>
 #include <ole2.h>
 #include "WMFByteStream.h"
 #include "WMFSourceReaderCallback.h"
 #include "WMFUtils.h"
 #include "MediaResource.h"
 #include "nsISeekableStream.h"
 #include "mozilla/RefPtr.h"
 #include "nsIThreadPool.h"
 #include "nsXPCOMCIDInternal.h"
 #include "nsComponentManagerUtils.h"
 #include "mozilla/DebugOnly.h"
 #include "SharedThreadPool.h"
 #include <algorithm>
 #include <cassert>
 namespace mozilla {
 #ifdef PR_LOGGING
 PRLogModuleInfo* gWMFByteStreamLog = nullptr;
 #define WMF_BS_LOG(...) PR_LOG(gWMFByteStreamLog, PR_LOG_DEBUG, (__VA_ARGS__))
 #else
 #define WMF_BS_LOG(...)
 #endif
 WMFByteStream::WMFByteStream(MediaResource* aResource,
                              WMFSourceReaderCallback* aSourceReaderCallback)
   : mSourceReaderCallback(aSourceReaderCallback),
     mResource(aResource),
     mReentrantMonitor("WMFByteStream.Data"),
     mOffset(0),
     mIsShutdown(false)
 {
   NS_ASSERTION(NS_IsMainThread(), "Must be on main thread.");
   NS_ASSERTION(mSourceReaderCallback, "Must have a source reader callback.");
 #ifdef PR_LOGGING
   if (!gWMFByteStreamLog) {
     gWMFByteStreamLog = PR_NewLogModule("WMFByteStream");
   }
 #endif
   WMF_BS_LOG("[%p] WMFByteStream CTOR", this);
   MOZ_COUNT_CTOR(WMFByteStream);
 }
 WMFByteStream::~WMFByteStream()
 {
   MOZ_COUNT_DTOR(WMFByteStream);
   WMF_BS_LOG("[%p] WMFByteStream DTOR", this);
 }
 nsresult
 WMFByteStream::Init()
 {
   NS_ASSERTION(NS_IsMainThread(), "Must be on main thread.");
   mThreadPool = SharedThreadPool::Get(NS_LITERAL_CSTRING("WMFByteStream IO"), 4);
   NS_ENSURE_TRUE(mThreadPool, NS_ERROR_FAILURE);
   NS_ConvertUTF8toUTF16 contentTypeUTF16(mResource->GetContentType());
   if (!contentTypeUTF16.IsEmpty()) {
     HRESULT hr = wmf::MFCreateAttributes(byRef(mAttributes), 1);
     NS_ENSURE_TRUE(SUCCEEDED(hr), NS_ERROR_FAILURE);
     hr = mAttributes->SetString(MF_BYTESTREAM_CONTENT_TYPE,
                                 contentTypeUTF16.get());
     NS_ENSURE_TRUE(SUCCEEDED(hr), NS_ERROR_FAILURE);
     WMF_BS_LOG("[%p] WMFByteStream has Content-Type=%s", this, mResource->GetContentType().get());
   }
   return NS_OK;
 }
 nsresult
 WMFByteStream::Shutdown()
 {
   {
     ReentrantMonitorAutoEnter mon(mReentrantMonitor);
     mIsShutdown = true;
   }
   mSourceReaderCallback->Cancel();
   return NS_OK;
 }
 // IUnknown Methods
 STDMETHODIMP
 WMFByteStream::QueryInterface(REFIID aIId, void **aInterface)
 {
   WMF_BS_LOG("[%p] WMFByteStream::QueryInterface %s", this, GetGUIDName(aIId).get());
   if (aIId == IID_IMFByteStream) {
     return DoGetInterface(static_cast<IMFByteStream*>(this), aInterface);
   }
   if (aIId == IID_IUnknown) {
     return DoGetInterface(static_cast<IMFByteStream*>(this), aInterface);
   }
   if (aIId == IID_IMFAttributes) {
     return DoGetInterface(static_cast<IMFAttributes*>(this), aInterface);
   }
   *aInterface = nullptr;
   return E_NOINTERFACE;
 }
 NS_IMPL_ADDREF(WMFByteStream)
 NS_IMPL_RELEASE(WMFByteStream)
 // Stores data regarding an async read opreation.
 class ReadRequest MOZ_FINAL : public IUnknown {
 public:
   ReadRequest(int64_t aOffset, BYTE* aBuffer, ULONG aLength)
     : mOffset(aOffset),
       mBuffer(aBuffer),
       mBufferLength(aLength),
       mBytesRead(0)
   {}
   // IUnknown Methods
   STDMETHODIMP QueryInterface(REFIID aRIID, LPVOID *aOutObject);
   STDMETHODIMP_(ULONG) AddRef();
   STDMETHODIMP_(ULONG) Release();
   int64_t mOffset;
   BYTE* mBuffer;
   ULONG mBufferLength;
   ULONG mBytesRead;
   // IUnknown ref counting.
   ThreadSafeAutoRefCnt mRefCnt;
   NS_DECL_OWNINGTHREAD
 };
 NS_IMPL_ADDREF(ReadRequest)
 NS_IMPL_RELEASE(ReadRequest)
 // IUnknown Methods
 STDMETHODIMP
 ReadRequest::QueryInterface(REFIID aIId, void **aInterface)
 {
   WMF_BS_LOG("ReadRequest::QueryInterface %s", GetGUIDName(aIId).get());
   if (aIId == IID_IUnknown) {
     return DoGetInterface(static_cast<IUnknown*>(this), aInterface);
   }
   *aInterface = nullptr;
   return E_NOINTERFACE;
 }
 class ProcessReadRequestEvent MOZ_FINAL : public nsRunnable {
 public:
   ProcessReadRequestEvent(WMFByteStream* aStream,
                           IMFAsyncResult* aResult,
                           ReadRequest* aRequestState)
     : mStream(aStream),
       mResult(aResult),
       mRequestState(aRequestState) {}
   NS_IMETHOD Run() {
     mStream->ProcessReadRequest(mResult, mRequestState);
     return NS_OK;
   }
 private:
   RefPtr<WMFByteStream> mStream;
   RefPtr<IMFAsyncResult> mResult;
   RefPtr<ReadRequest> mRequestState;
 };
 // IMFByteStream Methods
 STDMETHODIMP
 WMFByteStream::BeginRead(BYTE *aBuffer,
                          ULONG aLength,
                          IMFAsyncCallback *aCallback,
                          IUnknown *aCallerState)
 {
   NS_ENSURE_TRUE(aBuffer, E_POINTER);
   NS_ENSURE_TRUE(aCallback, E_POINTER);
   ReentrantMonitorAutoEnter mon(mReentrantMonitor);
   WMF_BS_LOG("[%p] WMFByteStream::BeginRead() mOffset=%lld tell=%lld length=%lu mIsShutdown=%d",
              this, mOffset, mResource->Tell(), aLength, mIsShutdown);
   if (mIsShutdown || mOffset < 0) {
     return E_INVALIDARG;
   }
   // Create an object to store our state.
   RefPtr<ReadRequest> requestState = new ReadRequest(mOffset, aBuffer, aLength);
   // Create an IMFAsyncResult, this is passed back to the caller as a token to
   // retrieve the number of bytes read.
   RefPtr<IMFAsyncResult> callersResult;
   HRESULT hr = wmf::MFCreateAsyncResult(requestState,
                                         aCallback,
                                         aCallerState,
                                         byRef(callersResult));
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
   // Dispatch an event to perform the read in the thread pool.
   nsCOMPtr<nsIRunnable> r = new ProcessReadRequestEvent(this,
                                                         callersResult,
                                                         requestState);
   nsresult rv = mThreadPool->Dispatch(r, NS_DISPATCH_NORMAL);
   if (mResource->GetLength() > -1) {
     mOffset = std::min<int64_t>(mOffset + aLength, mResource->GetLength());
   } else {
     mOffset += aLength;
   }
   return NS_SUCCEEDED(rv) ? S_OK : E_FAIL;
 }
 nsresult
 WMFByteStream::Read(ReadRequest* aRequestState)
 {
   // Read in a loop to ensure we fill the buffer, when possible.
   ULONG totalBytesRead = 0;
   nsresult rv = NS_OK;
   while (totalBytesRead < aRequestState->mBufferLength) {
     BYTE* buffer = aRequestState->mBuffer + totalBytesRead;
     ULONG bytesRead = 0;
     ULONG length = aRequestState->mBufferLength - totalBytesRead;
     rv = mResource->ReadAt(aRequestState->mOffset + totalBytesRead,
                            reinterpret_cast<char*>(buffer),
                            length,
                            reinterpret_cast<uint32_t*>(&bytesRead));
     NS_ENSURE_SUCCESS(rv, rv);
     totalBytesRead += bytesRead;
     if (bytesRead == 0) {
       break;
     }
   }
   aRequestState->mBytesRead = totalBytesRead;
   return NS_OK;
 }
 // Note: This is called on one of the thread pool's threads.
 void
 WMFByteStream::ProcessReadRequest(IMFAsyncResult* aResult,
                                   ReadRequest* aRequestState)
 {
   if (mResource->GetLength() > -1 &&
       aRequestState->mOffset > mResource->GetLength()) {
     aResult->SetStatus(S_OK);
     wmf::MFInvokeCallback(aResult);
     WMF_BS_LOG("[%p] WMFByteStream::ProcessReadRequest() read offset greater than length, soft-failing read", this);
     return;
   }
   nsresult rv = Read(aRequestState);
   if (NS_FAILED(rv)) {
     Shutdown();
     aResult->SetStatus(E_ABORT);
   } else {
     aResult->SetStatus(S_OK);
   }
   WMF_BS_LOG("[%p] WMFByteStream::ProcessReadRequest() read %d at %lld finished rv=%x",
              this, aRequestState->mBytesRead, aRequestState->mOffset, rv);
   // Let caller know read is complete.
   DebugOnly<HRESULT> hr = wmf::MFInvokeCallback(aResult);
   NS_ASSERTION(SUCCEEDED(hr), "Failed to invoke callback!");
 }
 STDMETHODIMP
 WMFByteStream::BeginWrite(const BYTE *, ULONG ,
                           IMFAsyncCallback *,
                           IUnknown *)
 {
   WMF_BS_LOG("[%p] WMFByteStream::BeginWrite()", this);
   return E_NOTIMPL;
 }
 STDMETHODIMP
 WMFByteStream::Close()
 {
   WMF_BS_LOG("[%p] WMFByteStream::Close()", this);
   return S_OK;
 }
 STDMETHODIMP
 WMFByteStream::EndRead(IMFAsyncResult* aResult, ULONG *aBytesRead)
 {
   NS_ENSURE_TRUE(aResult, E_POINTER);
   NS_ENSURE_TRUE(aBytesRead, E_POINTER);
   ReentrantMonitorAutoEnter mon(mReentrantMonitor);
   // Extract our state object.
   RefPtr<IUnknown> unknown;
   HRESULT hr = aResult->GetObject(byRef(unknown));
   if (FAILED(hr) || !unknown) {
     return E_INVALIDARG;
   }
   ReadRequest* requestState =
     static_cast<ReadRequest*>(unknown.get());
   // Report result.
   *aBytesRead = requestState->mBytesRead;
   WMF_BS_LOG("[%p] WMFByteStream::EndRead() offset=%lld *aBytesRead=%u mOffset=%lld status=0x%x hr=0x%x eof=%d",
              this, requestState->mOffset, *aBytesRead, mOffset, aResult->GetStatus(), hr, IsEOS());
   return aResult->GetStatus();
 }
 STDMETHODIMP
 WMFByteStream::EndWrite(IMFAsyncResult *, ULONG *)
 {
   WMF_BS_LOG("[%p] WMFByteStream::EndWrite()", this);
   return E_NOTIMPL;
 }
 STDMETHODIMP
 WMFByteStream::Flush()
 {
   WMF_BS_LOG("[%p] WMFByteStream::Flush()", this);
   return S_OK;
 }
 STDMETHODIMP
 WMFByteStream::GetCapabilities(DWORD *aCapabilities)
 {
   WMF_BS_LOG("[%p] WMFByteStream::GetCapabilities()", this);
   NS_ENSURE_TRUE(aCapabilities, E_POINTER);
   ReentrantMonitorAutoEnter mon(mReentrantMonitor);
   bool seekable = mResource->IsTransportSeekable();
   bool cached = mResource->IsDataCachedToEndOfResource(0);
   *aCapabilities = MFBYTESTREAM_IS_READABLE |
                    MFBYTESTREAM_IS_SEEKABLE |
                    (!cached ? MFBYTESTREAM_IS_PARTIALLY_DOWNLOADED : 0) |
                    (!seekable ? MFBYTESTREAM_HAS_SLOW_SEEK : 0);
   return S_OK;
 }
 STDMETHODIMP
 WMFByteStream::GetCurrentPosition(QWORD *aPosition)
 {
   NS_ENSURE_TRUE(aPosition, E_POINTER);
   ReentrantMonitorAutoEnter mon(mReentrantMonitor);
   // Note: Returning the length of stream as position when read
   // cursor is < 0 seems to be the behaviour expected by WMF, but
   // also note it doesn't seem to expect that the position is an
   // unsigned value since if you seek to > length and read WMF
   // expects the read to succeed after reading 0 bytes, but if you
   // seek to < 0 and read, the read is expected to fails... So
   // go figure...
   *aPosition = mOffset < 0 ? mResource->GetLength() : mOffset;
   WMF_BS_LOG("[%p] WMFByteStream::GetCurrentPosition() %lld", this, mOffset);
   return S_OK;
 }
 STDMETHODIMP
 WMFByteStream::GetLength(QWORD *aLength)
 {
   NS_ENSURE_TRUE(aLength, E_POINTER);
   ReentrantMonitorAutoEnter mon(mReentrantMonitor);
   *aLength = mResource->GetLength();
   WMF_BS_LOG("[%p] WMFByteStream::GetLength() %lld", this, *aLength);
   return S_OK;
 }
 bool
 WMFByteStream::IsEOS()
 {
   ReentrantMonitorAutoEnter mon(mReentrantMonitor);
   return mResource->GetLength() > -1 &&
          (mOffset < 0 ||
           mOffset >= mResource->GetLength());
 }
 STDMETHODIMP
 WMFByteStream::IsEndOfStream(BOOL *aEndOfStream)
 {
   NS_ENSURE_TRUE(aEndOfStream, E_POINTER);
   *aEndOfStream = IsEOS();
   WMF_BS_LOG("[%p] WMFByteStream::IsEndOfStream() %d", this, *aEndOfStream);
   return S_OK;
 }
 STDMETHODIMP
 WMFByteStream::Read(BYTE* aBuffer, ULONG aBufferLength, ULONG* aOutBytesRead)
 {
   ReentrantMonitorAutoEnter mon(mReentrantMonitor);
   ReadRequest request(mOffset, aBuffer, aBufferLength);
   if (NS_FAILED(Read(&request))) {
     WMF_BS_LOG("[%p] WMFByteStream::Read() offset=%lld failed!", this, mOffset);
     return E_FAIL;
   }
   if (aOutBytesRead) {
     *aOutBytesRead = request.mBytesRead;
   }
   WMF_BS_LOG("[%p] WMFByteStream::Read() offset=%lld length=%u bytesRead=%u",
              this, mOffset, aBufferLength, request.mBytesRead);
   mOffset += request.mBytesRead;
   return S_OK;
 }
 STDMETHODIMP
 WMFByteStream::Seek(MFBYTESTREAM_SEEK_ORIGIN aSeekOrigin,
                     LONGLONG aSeekOffset,
                     DWORD aSeekFlags,
                     QWORD *aCurrentPosition)
 {
   WMF_BS_LOG("[%p] WMFByteStream::Seek(%d, %lld)", this, aSeekOrigin, aSeekOffset);
   ReentrantMonitorAutoEnter mon(mReentrantMonitor);
   int64_t offset = mOffset;
   if (aSeekOrigin == msoBegin) {
     offset = aSeekOffset;
   } else {
     offset += aSeekOffset;
   }
   int64_t length = mResource->GetLength();
   if (length > -1) {
     mOffset = std::min<int64_t>(offset, length);
   } else {
     mOffset = offset;
   }
   if (aCurrentPosition) {
     *aCurrentPosition = mOffset;
   }
   return S_OK;
 }
 STDMETHODIMP
 WMFByteStream::SetCurrentPosition(QWORD aPosition)
 {
   ReentrantMonitorAutoEnter mon(mReentrantMonitor);
   WMF_BS_LOG("[%p] WMFByteStream::SetCurrentPosition(%lld)",
              this, aPosition);
   int64_t length = mResource->GetLength();
   if (length > -1) {
     mOffset = std::min<int64_t>(aPosition, length);
   } else {
     mOffset = aPosition;
   }
   return S_OK;
 }
 STDMETHODIMP
 WMFByteStream::SetLength(QWORD)
 {
   WMF_BS_LOG("[%p] WMFByteStream::SetLength()", this);
   return E_NOTIMPL;
 }
 STDMETHODIMP
 WMFByteStream::Write(const BYTE *, ULONG, ULONG *)
 {
   WMF_BS_LOG("[%p] WMFByteStream::Write()", this);
   return E_NOTIMPL;
 }
 // IMFAttributes methods
 STDMETHODIMP
 WMFByteStream::GetItem(REFGUID guidKey, PROPVARIANT* pValue)
 {
     MOZ_ASSERT(mAttributes);
     return mAttributes->GetItem(guidKey, pValue);
 }
 STDMETHODIMP
 WMFByteStream::GetItemType(REFGUID guidKey, MF_ATTRIBUTE_TYPE* pType)
 {
     assert(mAttributes);
     return mAttributes->GetItemType(guidKey, pType);
 }
 STDMETHODIMP
 WMFByteStream::CompareItem(REFGUID guidKey, REFPROPVARIANT Value, BOOL* pbResult)
 {
     assert(mAttributes);
     return mAttributes->CompareItem(guidKey, Value, pbResult);
 }
 STDMETHODIMP
 WMFByteStream::Compare(IMFAttributes* pTheirs,
                        MF_ATTRIBUTES_MATCH_TYPE MatchType,
                        BOOL* pbResult)
 {
     assert(mAttributes);
     return mAttributes->Compare(pTheirs, MatchType, pbResult);
 }
 STDMETHODIMP
 WMFByteStream::GetUINT32(REFGUID guidKey, UINT32* punValue)
 {
     assert(mAttributes);
     return mAttributes->GetUINT32(guidKey, punValue);
 }
 STDMETHODIMP
 WMFByteStream::GetUINT64(REFGUID guidKey, UINT64* punValue)
 {
     assert(mAttributes);
     return mAttributes->GetUINT64(guidKey, punValue);
 }
 STDMETHODIMP
 WMFByteStream::GetDouble(REFGUID guidKey, double* pfValue)
 {
     assert(mAttributes);
     return mAttributes->GetDouble(guidKey, pfValue);
 }
 STDMETHODIMP
 WMFByteStream::GetGUID(REFGUID guidKey, GUID* pguidValue)
 {
     assert(mAttributes);
     return mAttributes->GetGUID(guidKey, pguidValue);
 }
 STDMETHODIMP
 WMFByteStream::GetStringLength(REFGUID guidKey, UINT32* pcchLength)
 {
     assert(mAttributes);
     return mAttributes->GetStringLength(guidKey, pcchLength);
 }
 STDMETHODIMP
 WMFByteStream::GetString(REFGUID guidKey, LPWSTR pwszValue, UINT32 cchBufSize, UINT32* pcchLength)
 {
     assert(mAttributes);
     return mAttributes->GetString(guidKey, pwszValue, cchBufSize, pcchLength);
 }
 STDMETHODIMP
 WMFByteStream::GetAllocatedString(REFGUID guidKey, LPWSTR* ppwszValue, UINT32* pcchLength)
 {
     assert(mAttributes);
     return mAttributes->GetAllocatedString(guidKey, ppwszValue, pcchLength);
 }
 STDMETHODIMP
 WMFByteStream::GetBlobSize(REFGUID guidKey, UINT32* pcbBlobSize)
 {
     assert(mAttributes);
     return mAttributes->GetBlobSize(guidKey, pcbBlobSize);
 }
 STDMETHODIMP
 WMFByteStream::GetBlob(REFGUID guidKey, UINT8* pBuf, UINT32 cbBufSize, UINT32* pcbBlobSize)
 {
     assert(mAttributes);
     return mAttributes->GetBlob(guidKey, pBuf, cbBufSize, pcbBlobSize);
 }
 STDMETHODIMP
 WMFByteStream::GetAllocatedBlob(REFGUID guidKey, UINT8** ppBuf, UINT32* pcbSize)
 {
     assert(mAttributes);
     return mAttributes->GetAllocatedBlob(guidKey, ppBuf, pcbSize);
 }
 STDMETHODIMP
 WMFByteStream::GetUnknown(REFGUID guidKey, REFIID riid, LPVOID* ppv)
 {
     assert(mAttributes);
     return mAttributes->GetUnknown(guidKey, riid, ppv);
 }
 STDMETHODIMP
 WMFByteStream::SetItem(REFGUID guidKey, REFPROPVARIANT Value)
 {
     assert(mAttributes);
     return mAttributes->SetItem(guidKey, Value);
 }
 STDMETHODIMP
 WMFByteStream::DeleteItem(REFGUID guidKey)
 {
     assert(mAttributes);
     return mAttributes->DeleteItem(guidKey);
 }
 STDMETHODIMP
 WMFByteStream::DeleteAllItems()
 {
     assert(mAttributes);
     return mAttributes->DeleteAllItems();
 }
 STDMETHODIMP
 WMFByteStream::SetUINT32(REFGUID guidKey, UINT32 unValue)
 {
     assert(mAttributes);
     return mAttributes->SetUINT32(guidKey, unValue);
 }
 STDMETHODIMP
 WMFByteStream::SetUINT64(REFGUID guidKey,UINT64 unValue)
 {
     assert(mAttributes);
     return mAttributes->SetUINT64(guidKey, unValue);
 }
 STDMETHODIMP
 WMFByteStream::SetDouble(REFGUID guidKey, double fValue)
 {
     assert(mAttributes);
     return mAttributes->SetDouble(guidKey, fValue);
 }
 STDMETHODIMP
 WMFByteStream::SetGUID(REFGUID guidKey, REFGUID guidValue)
 {
     assert(mAttributes);
     return mAttributes->SetGUID(guidKey, guidValue);
 }
 STDMETHODIMP
 WMFByteStream::SetString(REFGUID guidKey, LPCWSTR wszValue)
 {
     assert(mAttributes);
     return mAttributes->SetString(guidKey, wszValue);
 }
 STDMETHODIMP
 WMFByteStream::SetBlob(REFGUID guidKey, const UINT8* pBuf, UINT32 cbBufSize)
 {
     assert(mAttributes);
     return mAttributes->SetBlob(guidKey, pBuf, cbBufSize);
 }
 STDMETHODIMP
 WMFByteStream::SetUnknown(REFGUID guidKey, IUnknown* pUnknown)
 {
     assert(mAttributes);
     return mAttributes->SetUnknown(guidKey, pUnknown);
 }
 STDMETHODIMP
 WMFByteStream::LockStore()
 {
     assert(mAttributes);
     return mAttributes->LockStore();
 }
 STDMETHODIMP
 WMFByteStream::UnlockStore()
 {
     assert(mAttributes);
     return mAttributes->UnlockStore();
 }
 STDMETHODIMP
 WMFByteStream::GetCount(UINT32* pcItems)
 {
     assert(mAttributes);
     return mAttributes->GetCount(pcItems);
 }
 STDMETHODIMP
 WMFByteStream::GetItemByIndex(UINT32 unIndex, GUID* pguidKey, PROPVARIANT* pValue)
 {
     assert(mAttributes);
     return mAttributes->GetItemByIndex(unIndex, pguidKey, pValue);
 }
 STDMETHODIMP
 WMFByteStream::CopyAllItems(IMFAttributes* pDest)
 {
     assert(mAttributes);
     return mAttributes->CopyAllItems(pDest);
 }
 } // namespace mozilla

The Tor Browser / annotate

content/media/wmf/WMFByteStream.cpp@97036ab72558 (annotated)

content/media/wmf/WMFByteStream.cpp