content/media/wmf/WMFSourceReaderCallback.cpp@97036ab72558 (annotated)
content/media/wmf/WMFSourceReaderCallback.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.
| 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 | |
| michael@0 | 7 | #include "WMFSourceReaderCallback.h" |
| michael@0 | 8 | #include "WMFUtils.h" |
| michael@0 | 9 | |
| michael@0 | 10 | namespace mozilla { |
| michael@0 | 11 | |
| michael@0 | 12 | #ifdef PR_LOGGING |
| michael@0 | 13 | static PRLogModuleInfo* gWMFSourceReaderCallbackLog = nullptr; |
| michael@0 | 14 | #define WMF_CB_LOG(...) PR_LOG(gWMFSourceReaderCallbackLog, PR_LOG_DEBUG, (__VA_ARGS__)) |
| michael@0 | 15 | #else |
| michael@0 | 16 | #define WMF_CB_LOG(...) |
| michael@0 | 17 | #endif |
| michael@0 | 18 | |
| michael@0 | 19 | // IUnknown Methods |
| michael@0 | 20 | STDMETHODIMP |
| michael@0 | 21 | WMFSourceReaderCallback::QueryInterface(REFIID aIId, void **aInterface) |
| michael@0 | 22 | { |
| michael@0 | 23 | WMF_CB_LOG("WMFSourceReaderCallback::QueryInterface %s", GetGUIDName(aIId).get()); |
| michael@0 | 24 | |
| michael@0 | 25 | if (aIId == IID_IMFSourceReaderCallback) { |
| michael@0 | 26 | return DoGetInterface(static_cast<WMFSourceReaderCallback*>(this), aInterface); |
| michael@0 | 27 | } |
| michael@0 | 28 | if (aIId == IID_IUnknown) { |
| michael@0 | 29 | return DoGetInterface(static_cast<WMFSourceReaderCallback*>(this), aInterface); |
| michael@0 | 30 | } |
| michael@0 | 31 | |
| michael@0 | 32 | *aInterface = nullptr; |
| michael@0 | 33 | return E_NOINTERFACE; |
| michael@0 | 34 | } |
| michael@0 | 35 | |
| michael@0 | 36 | NS_IMPL_ADDREF(WMFSourceReaderCallback) |
| michael@0 | 37 | NS_IMPL_RELEASE(WMFSourceReaderCallback) |
| michael@0 | 38 | |
| michael@0 | 39 | WMFSourceReaderCallback::WMFSourceReaderCallback() |
| michael@0 | 40 | : mMonitor("WMFSourceReaderCallback") |
| michael@0 | 41 | , mResultStatus(S_OK) |
| michael@0 | 42 | , mStreamFlags(0) |
| michael@0 | 43 | , mTimestamp(0) |
| michael@0 | 44 | , mSample(nullptr) |
| michael@0 | 45 | , mReadFinished(false) |
| michael@0 | 46 | { |
| michael@0 | 47 | #ifdef PR_LOGGING |
| michael@0 | 48 | if (!gWMFSourceReaderCallbackLog) { |
| michael@0 | 49 | gWMFSourceReaderCallbackLog = PR_NewLogModule("WMFSourceReaderCallback"); |
| michael@0 | 50 | } |
| michael@0 | 51 | #endif |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | HRESULT |
| michael@0 | 55 | WMFSourceReaderCallback::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 | // Note: aSample can be nullptr on success if more data is required! |
| michael@0 | 62 | ReentrantMonitorAutoEnter mon(mMonitor); |
| michael@0 | 63 | |
| michael@0 | 64 | if (mSample) { |
| michael@0 | 65 | // The WMFReader should have called Wait() to retrieve the last |
| michael@0 | 66 | // sample returned by the last ReadSample() call, but if we're |
| michael@0 | 67 | // aborting the read before Wait() is called the sample ref |
| michael@0 | 68 | // can be non-null. |
| michael@0 | 69 | mSample->Release(); |
| michael@0 | 70 | mSample = nullptr; |
| michael@0 | 71 | } |
| michael@0 | 72 | |
| michael@0 | 73 | if (SUCCEEDED(aReadStatus)) { |
| michael@0 | 74 | if (aSample) { |
| michael@0 | 75 | mTimestamp = aTimestamp; |
| michael@0 | 76 | mSample = aSample; |
| michael@0 | 77 | mSample->AddRef(); |
| michael@0 | 78 | } |
| michael@0 | 79 | } |
| michael@0 | 80 | |
| michael@0 | 81 | mResultStatus = aReadStatus; |
| michael@0 | 82 | mStreamFlags = aStreamFlags; |
| michael@0 | 83 | |
| michael@0 | 84 | // Set the sentinal value and notify the monitor, so that threads waiting |
| michael@0 | 85 | // in Wait() are awoken. |
| michael@0 | 86 | mReadFinished = true; |
| michael@0 | 87 | mon.NotifyAll(); |
| michael@0 | 88 | |
| michael@0 | 89 | return S_OK; |
| michael@0 | 90 | } |
| michael@0 | 91 | |
| michael@0 | 92 | STDMETHODIMP |
| michael@0 | 93 | WMFSourceReaderCallback::OnReadSample(HRESULT aReadStatus, |
| michael@0 | 94 | DWORD aStreamIndex, |
| michael@0 | 95 | DWORD aStreamFlags, |
| michael@0 | 96 | LONGLONG aTimestamp, |
| michael@0 | 97 | IMFSample *aSample) |
| michael@0 | 98 | { |
| michael@0 | 99 | WMF_CB_LOG("WMFSourceReaderCallback::OnReadSample() hr=0x%x flags=0x%x time=%lld sample=%p", |
| michael@0 | 100 | aReadStatus, aStreamFlags, aTimestamp, aSample); |
| michael@0 | 101 | return NotifyReadComplete(aReadStatus, |
| michael@0 | 102 | aStreamIndex, |
| michael@0 | 103 | aStreamFlags, |
| michael@0 | 104 | aTimestamp, |
| michael@0 | 105 | aSample); |
| michael@0 | 106 | } |
| michael@0 | 107 | |
| michael@0 | 108 | HRESULT |
| michael@0 | 109 | WMFSourceReaderCallback::Cancel() |
| michael@0 | 110 | { |
| michael@0 | 111 | WMF_CB_LOG("WMFSourceReaderCallback::Cancel()"); |
| michael@0 | 112 | return NotifyReadComplete(E_ABORT, |
| michael@0 | 113 | 0, |
| michael@0 | 114 | 0, |
| michael@0 | 115 | 0, |
| michael@0 | 116 | nullptr); |
| michael@0 | 117 | } |
| michael@0 | 118 | |
| michael@0 | 119 | STDMETHODIMP |
| michael@0 | 120 | WMFSourceReaderCallback::OnEvent(DWORD, IMFMediaEvent *) |
| michael@0 | 121 | { |
| michael@0 | 122 | return S_OK; |
| michael@0 | 123 | } |
| michael@0 | 124 | |
| michael@0 | 125 | STDMETHODIMP |
| michael@0 | 126 | WMFSourceReaderCallback::OnFlush(DWORD) |
| michael@0 | 127 | { |
| michael@0 | 128 | return S_OK; |
| michael@0 | 129 | } |
| michael@0 | 130 | |
| michael@0 | 131 | HRESULT |
| michael@0 | 132 | WMFSourceReaderCallback::Wait(DWORD* aStreamFlags, |
| michael@0 | 133 | LONGLONG* aTimeStamp, |
| michael@0 | 134 | IMFSample** aSample) |
| michael@0 | 135 | { |
| michael@0 | 136 | ReentrantMonitorAutoEnter mon(mMonitor); |
| michael@0 | 137 | WMF_CB_LOG("WMFSourceReaderCallback::Wait() starting wait"); |
| michael@0 | 138 | while (!mReadFinished) { |
| michael@0 | 139 | mon.Wait(); |
| michael@0 | 140 | } |
| michael@0 | 141 | mReadFinished = false; |
| michael@0 | 142 | WMF_CB_LOG("WMFSourceReaderCallback::Wait() done waiting"); |
| michael@0 | 143 | |
| michael@0 | 144 | *aStreamFlags = mStreamFlags; |
| michael@0 | 145 | *aTimeStamp = mTimestamp; |
| michael@0 | 146 | *aSample = mSample; |
| michael@0 | 147 | HRESULT hr = mResultStatus; |
| michael@0 | 148 | |
| michael@0 | 149 | mSample = nullptr; |
| michael@0 | 150 | mTimestamp = 0; |
| michael@0 | 151 | mStreamFlags = 0; |
| michael@0 | 152 | mResultStatus = S_OK; |
| michael@0 | 153 | |
| michael@0 | 154 | return hr; |
| michael@0 | 155 | } |
| michael@0 | 156 | |
| michael@0 | 157 | } // namespace mozilla |
