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79 lines
2.4 KiB
C++
79 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MediaDecoderStateMachineScheduler_h__
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#define MediaDecoderStateMachineScheduler_h__
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#include "nsCOMPtr.h"
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#include "mozilla/TimeStamp.h"
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#include "mozilla/DebugOnly.h"
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class nsITimer;
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class nsIEventTarget;
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namespace mozilla {
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class ReentrantMonitor;
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class MediaDecoderStateMachineScheduler {
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enum State {
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SCHEDULER_STATE_NONE,
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SCHEDULER_STATE_SHUTDOWN
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};
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public:
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(MediaDecoderStateMachineScheduler)
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MediaDecoderStateMachineScheduler(ReentrantMonitor& aMonitor,
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nsresult (*aTimeoutCallback)(void*),
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void* aClosure, bool aRealTime);
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nsresult Init();
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nsresult Schedule(int64_t aUsecs = 0);
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void ScheduleAndShutdown();
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nsresult TimeoutExpired(int aTimerId);
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bool OnStateMachineThread() const;
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bool IsScheduled() const;
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bool IsRealTime() const {
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return mRealTime;
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}
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nsIEventTarget* GetStateMachineThread() const {
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return mEventTarget;
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}
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private:
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~MediaDecoderStateMachineScheduler();
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void ResetTimer();
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// Callback function provided by MediaDecoderStateMachine to run
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// state machine cycles.
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nsresult (*const mTimeoutCallback)(void*);
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// Since StateMachineScheduler will never outlive the state machine,
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// it is safe to keep a raw pointer only to avoid reference cycles.
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void* const mClosure;
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// True is we are decoding a realtime stream, like a camera stream
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const bool mRealTime;
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// Monitor of the decoder
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ReentrantMonitor& mMonitor;
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// State machine thread
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const nsCOMPtr<nsIEventTarget> mEventTarget;
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// Timer to schedule callbacks to run the state machine cycles.
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nsCOMPtr<nsITimer> mTimer;
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// Timestamp at which the next state machine cycle will run.
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TimeStamp mTimeout;
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// The id of timer tasks, timer callback will only run if id matches.
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int mTimerId;
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// No more state machine cycles in shutdown state.
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State mState;
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// Used to check if state machine cycles are running in sequence.
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DebugOnly<bool> mInRunningStateMachine;
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};
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} // namespace mozilla
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#endif // MediaDecoderStateMachineScheduler_h__
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