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Bug 1472925 - Keep a strong reference to MediaStreamGraph from GraphDriver.

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This commit is contained in:
wolfbeast 2018-09-11 14:48:21 +02:00 • committed by Roy Tam
commit 44998d1f5b
3 changed files with 9 additions and 8 deletions
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8
dom/media/GraphDriver.cpp
View file

@ -200,7 +200,7 @@ public:
STREAM_LOG(LogLevel::Debug, ("Starting system thread"));
profiler_register_thread("MediaStreamGraph", &aLocal);
LIFECYCLE_LOG("Starting a new system driver for graph %p\n",
mDriver->mGraphImpl);
mDriver->mGraphImpl.get());
RefPtr<GraphDriver> previousDriver;
{
@ -236,7 +236,7 @@ private:
void
ThreadedDriver::Start()
{
LIFECYCLE_LOG("Starting thread for a SystemClockDriver %p\n", mGraphImpl);
LIFECYCLE_LOG("Starting thread for a SystemClockDriver %p\n", mGraphImpl.get());
Unused << NS_WARN_IF(mThread);
if (!mThread) { // Ensure we haven't already started it
nsCOMPtr<nsIRunnable> event = new MediaStreamGraphInitThreadRunnable(this);
@ -830,7 +830,9 @@ AudioCallbackDriver::Revive()
mGraphImpl->SetCurrentDriver(NextDriver());
NextDriver()->Start();
} else {
STREAM_LOG(LogLevel::Debug, ("Starting audio threads for MediaStreamGraph %p from a new thread.", mGraphImpl));
STREAM_LOG(LogLevel::Debug,
("Starting audio threads for MediaStreamGraph %p from a new thread.",
mGraphImpl.get()));
RefPtr<AsyncCubebTask> initEvent =
new AsyncCubebTask(this, AsyncCubebOperation::INIT);
initEvent->Dispatch();

6
dom/media/GraphDriver.h
View file

@ -210,10 +210,8 @@ protected:
// Time of the end of this graph iteration. This must be accessed while having
// the monitor.
GraphTime mIterationEnd;
// The MediaStreamGraphImpl that owns this driver. This has a lifetime longer
// than the driver, and will never be null. Hence, it can be accesed without
// monitor.
MediaStreamGraphImpl* mGraphImpl;
// The MediaStreamGraphImpl associated with this driver.
const RefPtr<MediaStreamGraphImpl> mGraphImpl;
// This enum specifies the wait state of the driver.
enum WaitState {

3
dom/media/MediaStreamGraph.cpp
View file

@ -3371,7 +3371,8 @@ MediaStreamGraphImpl::Destroy()
// First unregister from memory reporting.
UnregisterWeakMemoryReporter(this);
// Clear the self reference which will destroy this instance.
// Clear the self reference which will destroy this instance if all
// associated GraphDrivers are destroyed.
mSelfRef = nullptr;
}