content/media/wmf/WMFSourceReaderCallback.h@44a2da4a2ab2 (annotated)
content/media/wmf/WMFSourceReaderCallback.h
Fri, 16 Jan 2015 04:50:19 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 16 Jan 2015 04:50:19 +0100
- branch
- TOR_BUG_9701
- changeset 13
- 44a2da4a2ab2
- permissions
- -rw-r--r--
Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* vim:set ts=2 sw=2 sts=2 et cindent: */ |
| michael@0 | 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | #if !defined(WMFSourceReaderCallback_h_) |
| michael@0 | 7 | #define WMFSourceReaderCallback_h_ |
| michael@0 | 8 | |
| michael@0 | 9 | #include "WMF.h" |
| michael@0 | 10 | #include "mozilla/ReentrantMonitor.h" |
| michael@0 | 11 | #include "mozilla/RefPtr.h" |
| michael@0 | 12 | #include "nsISupportsImpl.h" |
| michael@0 | 13 | |
| michael@0 | 14 | namespace mozilla { |
| michael@0 | 15 | |
| michael@0 | 16 | // A listener which we pass into the IMFSourceReader upon creation which is |
| michael@0 | 17 | // notified when an asynchronous call to IMFSourceReader::ReadSample() |
| michael@0 | 18 | // completes. This allows us to abort ReadSample() operations when the |
| michael@0 | 19 | // WMFByteStream's underlying MediaResource is closed. This ensures that |
| michael@0 | 20 | // the decode threads don't get stuck in a synchronous ReadSample() call |
| michael@0 | 21 | // when the MediaResource is unexpectedly shutdown. |
| michael@0 | 22 | class WMFSourceReaderCallback MOZ_FINAL : public IMFSourceReaderCallback |
| michael@0 | 23 | { |
| michael@0 | 24 | public: |
| michael@0 | 25 | WMFSourceReaderCallback(); |
| michael@0 | 26 | |
| michael@0 | 27 | // IUnknown Methods. |
| michael@0 | 28 | STDMETHODIMP QueryInterface(REFIID aIId, LPVOID *aInterface); |
| michael@0 | 29 | STDMETHODIMP_(ULONG) AddRef(); |
| michael@0 | 30 | STDMETHODIMP_(ULONG) Release(); |
| michael@0 | 31 | |
| michael@0 | 32 | // IMFSourceReaderCallback methods |
| michael@0 | 33 | STDMETHODIMP OnReadSample(HRESULT hrStatus, |
| michael@0 | 34 | DWORD dwStreamIndex, |
| michael@0 | 35 | DWORD dwStreamFlags, |
| michael@0 | 36 | LONGLONG llTimestamp, |
| michael@0 | 37 | IMFSample *pSample); |
| michael@0 | 38 | STDMETHODIMP OnEvent(DWORD, IMFMediaEvent *); |
| michael@0 | 39 | STDMETHODIMP OnFlush(DWORD); |
| michael@0 | 40 | |
| michael@0 | 41 | // Causes the calling thread to block waiting for the |
| michael@0 | 42 | // IMFSourceReader::ReadSample() result callback to occur, or for the |
| michael@0 | 43 | // WMFByteStream to be closed. |
| michael@0 | 44 | HRESULT Wait(DWORD* aStreamFlags, |
| michael@0 | 45 | LONGLONG* aTimeStamp, |
| michael@0 | 46 | IMFSample** aSample); |
| michael@0 | 47 | |
| michael@0 | 48 | // Cancels Wait() calls. |
| michael@0 | 49 | HRESULT Cancel(); |
| michael@0 | 50 | |
| michael@0 | 51 | private: |
| michael@0 | 52 | |
| michael@0 | 53 | // Sets state to record the result of a read, and awake threads |
| michael@0 | 54 | // waiting in Wait(). |
| michael@0 | 55 | HRESULT NotifyReadComplete(HRESULT aReadStatus, |
| michael@0 | 56 | DWORD aStreamIndex, |
| michael@0 | 57 | DWORD aStreamFlags, |
| michael@0 | 58 | LONGLONG aTimestamp, |
| michael@0 | 59 | IMFSample *aSample); |
| michael@0 | 60 | |
| michael@0 | 61 | // Synchronizes all member data in this class, and Wait() blocks on |
| michael@0 | 62 | // and NotifyReadComplete() notifies this monitor. |
| michael@0 | 63 | ReentrantMonitor mMonitor; |
| michael@0 | 64 | |
| michael@0 | 65 | // Read result data. |
| michael@0 | 66 | HRESULT mResultStatus; |
| michael@0 | 67 | DWORD mStreamFlags; |
| michael@0 | 68 | LONGLONG mTimestamp; |
| michael@0 | 69 | IMFSample* mSample; |
| michael@0 | 70 | |
| michael@0 | 71 | // Sentinal. Set to true when a read result is returned. Wait() won't exit |
| michael@0 | 72 | // until this is set to true. |
| michael@0 | 73 | bool mReadFinished; |
| michael@0 | 74 | |
| michael@0 | 75 | // IUnknown ref counting. |
| michael@0 | 76 | ThreadSafeAutoRefCnt mRefCnt; |
| michael@0 | 77 | NS_DECL_OWNINGTHREAD |
| michael@0 | 78 | |
| michael@0 | 79 | }; |
| michael@0 | 80 | |
| michael@0 | 81 | } // namespace mozilla |
| michael@0 | 82 | |
| michael@0 | 83 | #endif // WMFSourceReaderCallback_h_ |
