The Tor Browser / file comparison
comparison: content/media/wmf/WMFSourceReaderCallback.h
content/media/wmf/WMFSourceReaderCallback.h
- branch
- TOR_BUG_3246
- changeset 6
- 8bccb770b82d
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| -1:000000000000 | 0:8f8488bfadcb |
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim:set ts=2 sw=2 sts=2 et cindent: */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 #if !defined(WMFSourceReaderCallback_h_) | |
| 7 #define WMFSourceReaderCallback_h_ | |
| 8 | |
| 9 #include "WMF.h" | |
| 10 #include "mozilla/ReentrantMonitor.h" | |
| 11 #include "mozilla/RefPtr.h" | |
| 12 #include "nsISupportsImpl.h" | |
| 13 | |
| 14 namespace mozilla { | |
| 15 | |
| 16 // A listener which we pass into the IMFSourceReader upon creation which is | |
| 17 // notified when an asynchronous call to IMFSourceReader::ReadSample() | |
| 18 // completes. This allows us to abort ReadSample() operations when the | |
| 19 // WMFByteStream's underlying MediaResource is closed. This ensures that | |
| 20 // the decode threads don't get stuck in a synchronous ReadSample() call | |
| 21 // when the MediaResource is unexpectedly shutdown. | |
| 22 class WMFSourceReaderCallback MOZ_FINAL : public IMFSourceReaderCallback | |
| 23 { | |
| 24 public: | |
| 25 WMFSourceReaderCallback(); | |
| 26 | |
| 27 // IUnknown Methods. | |
| 28 STDMETHODIMP QueryInterface(REFIID aIId, LPVOID *aInterface); | |
| 29 STDMETHODIMP_(ULONG) AddRef(); | |
| 30 STDMETHODIMP_(ULONG) Release(); | |
| 31 | |
| 32 // IMFSourceReaderCallback methods | |
| 33 STDMETHODIMP OnReadSample(HRESULT hrStatus, | |
| 34 DWORD dwStreamIndex, | |
| 35 DWORD dwStreamFlags, | |
| 36 LONGLONG llTimestamp, | |
| 37 IMFSample *pSample); | |
| 38 STDMETHODIMP OnEvent(DWORD, IMFMediaEvent *); | |
| 39 STDMETHODIMP OnFlush(DWORD); | |
| 40 | |
| 41 // Causes the calling thread to block waiting for the | |
| 42 // IMFSourceReader::ReadSample() result callback to occur, or for the | |
| 43 // WMFByteStream to be closed. | |
| 44 HRESULT Wait(DWORD* aStreamFlags, | |
| 45 LONGLONG* aTimeStamp, | |
| 46 IMFSample** aSample); | |
| 47 | |
| 48 // Cancels Wait() calls. | |
| 49 HRESULT Cancel(); | |
| 50 | |
| 51 private: | |
| 52 | |
| 53 // Sets state to record the result of a read, and awake threads | |
| 54 // waiting in Wait(). | |
| 55 HRESULT NotifyReadComplete(HRESULT aReadStatus, | |
| 56 DWORD aStreamIndex, | |
| 57 DWORD aStreamFlags, | |
| 58 LONGLONG aTimestamp, | |
| 59 IMFSample *aSample); | |
| 60 | |
| 61 // Synchronizes all member data in this class, and Wait() blocks on | |
| 62 // and NotifyReadComplete() notifies this monitor. | |
| 63 ReentrantMonitor mMonitor; | |
| 64 | |
| 65 // Read result data. | |
| 66 HRESULT mResultStatus; | |
| 67 DWORD mStreamFlags; | |
| 68 LONGLONG mTimestamp; | |
| 69 IMFSample* mSample; | |
| 70 | |
| 71 // Sentinal. Set to true when a read result is returned. Wait() won't exit | |
| 72 // until this is set to true. | |
| 73 bool mReadFinished; | |
| 74 | |
| 75 // IUnknown ref counting. | |
| 76 ThreadSafeAutoRefCnt mRefCnt; | |
| 77 NS_DECL_OWNINGTHREAD | |
| 78 | |
| 79 }; | |
| 80 | |
| 81 } // namespace mozilla | |
| 82 | |
| 83 #endif // WMFSourceReaderCallback_h_ |
