1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/wmf/WMFSourceReaderCallback.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,83 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim:set ts=2 sw=2 sts=2 et cindent: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +#if !defined(WMFSourceReaderCallback_h_)
1.10 +#define WMFSourceReaderCallback_h_
1.11 +
1.12 +#include "WMF.h"
1.13 +#include "mozilla/ReentrantMonitor.h"
1.14 +#include "mozilla/RefPtr.h"
1.15 +#include "nsISupportsImpl.h"
1.16 +
1.17 +namespace mozilla {
1.18 +
1.19 +// A listener which we pass into the IMFSourceReader upon creation which is
1.20 +// notified when an asynchronous call to IMFSourceReader::ReadSample()
1.21 +// completes. This allows us to abort ReadSample() operations when the
1.22 +// WMFByteStream's underlying MediaResource is closed. This ensures that
1.23 +// the decode threads don't get stuck in a synchronous ReadSample() call
1.24 +// when the MediaResource is unexpectedly shutdown.
1.25 +class WMFSourceReaderCallback MOZ_FINAL : public IMFSourceReaderCallback
1.26 +{
1.27 +public:
1.28 + WMFSourceReaderCallback();
1.29 +
1.30 + // IUnknown Methods.
1.31 + STDMETHODIMP QueryInterface(REFIID aIId, LPVOID *aInterface);
1.32 + STDMETHODIMP_(ULONG) AddRef();
1.33 + STDMETHODIMP_(ULONG) Release();
1.34 +
1.35 + // IMFSourceReaderCallback methods
1.36 + STDMETHODIMP OnReadSample(HRESULT hrStatus,
1.37 + DWORD dwStreamIndex,
1.38 + DWORD dwStreamFlags,
1.39 + LONGLONG llTimestamp,
1.40 + IMFSample *pSample);
1.41 + STDMETHODIMP OnEvent(DWORD, IMFMediaEvent *);
1.42 + STDMETHODIMP OnFlush(DWORD);
1.43 +
1.44 + // Causes the calling thread to block waiting for the
1.45 + // IMFSourceReader::ReadSample() result callback to occur, or for the
1.46 + // WMFByteStream to be closed.
1.47 + HRESULT Wait(DWORD* aStreamFlags,
1.48 + LONGLONG* aTimeStamp,
1.49 + IMFSample** aSample);
1.50 +
1.51 + // Cancels Wait() calls.
1.52 + HRESULT Cancel();
1.53 +
1.54 +private:
1.55 +
1.56 + // Sets state to record the result of a read, and awake threads
1.57 + // waiting in Wait().
1.58 + HRESULT NotifyReadComplete(HRESULT aReadStatus,
1.59 + DWORD aStreamIndex,
1.60 + DWORD aStreamFlags,
1.61 + LONGLONG aTimestamp,
1.62 + IMFSample *aSample);
1.63 +
1.64 + // Synchronizes all member data in this class, and Wait() blocks on
1.65 + // and NotifyReadComplete() notifies this monitor.
1.66 + ReentrantMonitor mMonitor;
1.67 +
1.68 + // Read result data.
1.69 + HRESULT mResultStatus;
1.70 + DWORD mStreamFlags;
1.71 + LONGLONG mTimestamp;
1.72 + IMFSample* mSample;
1.73 +
1.74 + // Sentinal. Set to true when a read result is returned. Wait() won't exit
1.75 + // until this is set to true.
1.76 + bool mReadFinished;
1.77 +
1.78 + // IUnknown ref counting.
1.79 + ThreadSafeAutoRefCnt mRefCnt;
1.80 + NS_DECL_OWNINGTHREAD
1.81 +
1.82 +};
1.83 +
1.84 +} // namespace mozilla
1.85 +
1.86 +#endif // WMFSourceReaderCallback_h_
