Add min/max values for AudioParams

third_party/WebKit/Source/modules/webaudio/AudioParam.idl

 /*
  * Copyright (C) 2010 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 13 matching lines @@
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 [
 ] interface AudioParam {
     attribute float value;
     readonly attribute float defaultValue;
 
+    // Nominal range for the value.
+    readonly attribute float minValue;
+    readonly attribute float maxValue;
+
     // Parameter automation.
     [RaisesException, MeasureAs=AudioParamSetValueAtTime] AudioParam setValueAtTime(float value, double time);
     [RaisesException, MeasureAs=AudioParamLinearRampToValueAtTime] AudioParam linearRampToValueAtTime(float value, double time);
     [RaisesException, MeasureAs=AudioParamExponentialRampToValueAtTime] AudioParam exponentialRampToValueAtTime(float value, double time);
 
     // Exponentially approach the target with a rate having the given time constant.
     [RaisesException, MeasureAs=AudioParamSetTargetAtTime] AudioParam setTargetAtTime(float target, double time, double timeConstant);
 
     // Sets an array of arbitrary parameter values starting at time for the given duration.
     // The number of values will be scaled to fit into the desired duration.
     [RaisesException, MeasureAs=AudioParamSetValueCurveAtTime] AudioParam setValueCurveAtTime(Float32Array values, double time, double duration);
 
     // Cancels all scheduled parameter changes with times greater than or equal to startTime.
     [RaisesException, MeasureAs=AudioParamCancelScheduledValues] AudioParam cancelScheduledValues(double startTime);
 
 };