Split "Online" and "Offline" AudioContext processing

Source/modules/webaudio/AudioContext.h

Index: Source/modules/webaudio/AudioContext.h
diff --git a/Source/modules/webaudio/AudioContext.h b/Source/modules/webaudio/AudioContext.h
index 092eece9ac5f427e7bf33a1913c3ae1f5dd9c4b4..ade23d9814739f2f159ac068404afcffc6d1027c 100644
--- a/Source/modules/webaudio/AudioContext.h
+++ b/Source/modules/webaudio/AudioContext.h
@@ -100,7 +100,6 @@ public:
     DECLARE_VIRTUAL_TRACE();
 
     bool isInitialized() const { return m_isInitialized; }
-    bool isOfflineContext() { return m_isOfflineContext; }
 
     // Document notification
     virtual void stop() override final;
@@ -130,6 +129,8 @@ public:
 
     AudioListener* listener() { return m_listener.get(); }
 
+    virtual bool hasRealtimeConstraint() = 0;
+
     // The AudioNode create methods are called on the main thread (from JavaScript).
     AudioBufferSourceNode* createBufferSource(ExceptionState&);
     MediaElementAudioSourceNode* createMediaElementSource(HTMLMediaElement*, ExceptionState&);
@@ -157,11 +158,11 @@ public:
     PeriodicWave* createPeriodicWave(DOMFloat32Array* real, DOMFloat32Array* imag, ExceptionState&);
 
     // Close
-    ScriptPromise closeContext(ScriptState*);
+    virtual ScriptPromise closeContext(ScriptState*) = 0;
 
     // Suspend/Resume
-    ScriptPromise suspendContext(ScriptState*);
-    ScriptPromise resumeContext(ScriptState*);
+    virtual ScriptPromise suspendContext(ScriptState*) = 0;
+    virtual ScriptPromise resumeContext(ScriptState*) = 0;
 
     // When a source node has started processing and needs to be protected,
     // this method tells the context to protect the node.
@@ -230,10 +231,7 @@ public:
     //  - closeContext() has been called, even if the audio HW has not yet been
     //    stopped.  It will be stopped eventually.
     //  - it has been stopped (or is stopping) by its execution context.
-    bool isContextClosed() const { return m_closeResolver || m_isStopScheduled || m_isCleared; }
-
-    static unsigned s_hardwareContextCount;
-    static unsigned s_contextId;
+    virtual bool isContextClosed() const { return m_isStopScheduled || m_isCleared; }
 
     // Get the security origin for this audio context.
     SecurityOrigin* securityOrigin() const;
@@ -242,10 +240,19 @@ protected:
     explicit AudioContext(Document*);
     AudioContext(Document*, unsigned numberOfChannels, size_t numberOfFrames, float sampleRate);
 
+    void setContextState(AudioContextState);
+    virtual void didClose() {}
+    void uninitialize();
+
     RefPtrWillBeMember<ScriptPromiseResolver> m_offlineResolver;
+
+    // FIXME(dominicc): Move m_resumeResolvers to OnlineAudioContext, because only
+    // it creates these Promises.
+    // Vector of promises created by resume(). It takes time to handle them, so we collect all of
+    // the promises here until they can be resolved or rejected.
+    WillBeHeapVector<RefPtrWillBeMember<ScriptPromiseResolver>> m_resumeResolvers;
 private:
     void initialize();
-    void uninitialize();
 
     // ExecutionContext calls stop twice.
     // We'd like to schedule only one stop action for them.
@@ -278,16 +285,12 @@ private:
     // this.
     HeapVector<Member<AudioNode>> m_activeSourceNodes;
 
-    // Stop rendering the audio graph.
-    void stopRendering();
-
+    // FIXME(dominicc): Move these to OnlineAudioContext because only
+    // it creates these Promises.
     // Handle Promises for resume() and suspend()
     void resolvePromisesForResume();
     void resolvePromisesForResumeOnMainThread();
 
-    // Vector of promises created by resume(). It takes time to handle them, so we collect all of
-    // the promises here until they can be resolved or rejected.
-    WillBeHeapVector<RefPtrWillBeMember<ScriptPromiseResolver>> m_resumeResolvers;
     void rejectPendingResolvers();
 
     // True if we're in the process of resolving promises for resume().  Resolving can take some
@@ -303,17 +306,11 @@ private:
 
     Member<AudioBuffer> m_renderTarget;
 
-    bool m_isOfflineContext;
-
     // The state of the AudioContext.
     AudioContextState m_contextState;
-    void setContextState(AudioContextState);
 
     AsyncAudioDecoder m_audioDecoder;
 
-    // The Promise that is returned by close();
-    RefPtrWillBeMember<ScriptPromiseResolver> m_closeResolver;
-
     // Tries to handle AudioBufferSourceNodes that were started but became disconnected or was never
     // connected. Because these never get pulled anymore, they will stay around forever. So if we
     // can, try to stop them so they can be collected.
@@ -322,8 +319,6 @@ private:
     // This is considering 32 is large enough for multiple channels audio.
     // It is somewhat arbitrary and could be increased if necessary.
     enum { MaxNumberOfChannels = 32 };
-
-    unsigned m_contextId;
 };
 
 } // namespace blink