Use frames instead of time for running AudioParam timelines.

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 37 matching lines @@
     void linearRampToValueAtTime(float value, double time, ExceptionState&);
     void exponentialRampToValueAtTime(float value, double time, ExceptionState&);
     void setTargetAtTime(float target, double time, double timeConstant, ExceptionState&);
     void setValueCurveAtTime(DOMFloat32Array* curve, double time, double duration, ExceptionState&);
     void cancelScheduledValues(double startTime, ExceptionState&);
 
     // hasValue is set to true if a valid timeline value is returned.
     // otherwise defaultValue is returned.
     float valueForContextTime(AbstractAudioContext*, float defaultValue, bool& hasValue);
 
-    // Given the time range, calculates parameter values into the values buffer
-    // and returns the last parameter value calculated for "values" or the defaultValue if none were calculated.
-    // controlRate is the rate (number per second) at which parameter values will be calculated.
-    // It should equal sampleRate for sample-accurate parameter changes, and otherwise will usually match
-    // the render quantum size such that the parameter value changes once per render quantum.
-    float valuesForTimeRange(double startTime, double endTime, float defaultValue, float* values, unsigned numberOfValues, double sampleRate, double controlRate);
+    // Given the time range in frames, calculates parameter values into the values buffer and
+    // returns the last parameter value calculated for "values" or the defaultValue if none were
+    // calculated.  controlRate is the rate (number per second) at which parameter values will be
+    // calculated.  It should equal sampleRate for sample-accurate parameter changes, and otherwise
+    // will usually match the render quantum size such that the parameter value changes once per
+    // render quantum.
+    float valuesForFrameRange(size_t startFrame, size_t endFrame, float defaultValue, float* values, unsigned numberOfValues, double sampleRate, double controlRate);
 
     bool hasValues() { return m_events.size(); }
 
 private:
     class ParamEvent {
     public:
         enum Type {
             SetValue,
             LinearRampToValue,
             ExponentialRampToValue,
@@ skipping 22 matching lines @@
     private:
         Type m_type;
         float m_value;
         double m_time;
         double m_timeConstant;
         double m_duration;
         RefPtr<DOMFloat32Array> m_curve;
     };
 
     void insertEvent(const ParamEvent&, ExceptionState&);
-    float valuesForTimeRangeImpl(double startTime, double endTime, float defaultValue, float* values, unsigned numberOfValues, double sampleRate, double controlRate);
+    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;
 
     Mutex m_eventsLock;
 };
 
 } // namespace blink
 
 #endif // AudioParamTimeline_h