Implement clamping of AudioParam time.

third_party/WebKit/Source/modules/webaudio/AudioParamTimeline.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 109 matching lines @@
     static ParamEvent createSetTargetEvent(float value,
                                            double time,
                                            double timeConstant);
     static ParamEvent createSetValueCurveEvent(const DOMFloat32Array* curve,
                                                double time,
                                                double duration);
 
     Type getType() const { return m_type; }
     float value() const { return m_value; }
     double time() const { return m_time; }
+    void setTime(double newTime) { m_time = newTime; }
     double timeConstant() const { return m_timeConstant; }
     double duration() const { return m_duration; }
     Vector<float>& curve() { return m_curve; }
     float initialValue() const { return m_initialValue; }
     double callTime() const { return m_callTime; }
+    bool needsTimeClampCheck() const { return m_needsTimeClampCheck; }
+    void clearTimeClampCheck() { m_needsTimeClampCheck = false; }
 
    private:
     ParamEvent(Type type,
                float value,
                double time,
                double timeConstant,
                double duration,
                const DOMFloat32Array* curve,
                float initialValue = 0,
                double callTime = 0);
 
     Type m_type;
     float m_value;
     double m_time;
     // Only used for SetTarget events
     double m_timeConstant;
     // Only used for SetValueCurve events.
     double m_duration;
     Vector<float> m_curve;
     // Initial value and time to use for linear and exponential ramps that don't
     // have a preceding event.
     float m_initialValue;
     double m_callTime;
+    // True if the start time needs to be checked against current time
+    // to implement clamping.
+    bool m_needsTimeClampCheck;
   };
 
   void insertEvent(const ParamEvent&, ExceptionState&);
   float valuesForFrameRangeImpl(size_t startFrame,
                                 size_t endFrame,
                                 float defaultValue,
                                 float* values,
                                 unsigned numberOfValues,
                                 double sampleRate,
                                 double controlRate);
 
   // Produce a nice string describing the event in human-readable form.
   String eventToString(const ParamEvent&);
   Vector<ParamEvent> m_events;
 
   mutable Mutex m_eventsLock;
 
   // Smoothing (de-zippering)
   float m_smoothedValue;
 };
 
 }  // namespace blink
 
 #endif  // AudioParamTimeline_h