JDK-4493775 : Sequencer method, setTickPosition(long) doesnot set the Tick position
  • Type: Bug
  • Component: client-libs
  • Sub-Component: javax.sound
  • Affected Version: 1.4.0,1.4.2
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic,solaris_1
  • CPU: generic,sparc
  • Submitted: 2001-08-20
  • Updated: 2009-02-03
  • Resolved: 2003-09-27
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5.0 tigerFixed
Description
Sequncer method, setTickPosition(long) doesnot set the Tick position. So, when getTickPosition() is invoked. it returns 0 irrespective of the value of Tick positon set. 
Failing test case is attached with the bug.

Note:
Though the hardware info specifies only SunOS, it happens on all platforms

Name: vtR10009			Date: 06/11/2002


This bug causes failure of JCK test:
  api/javax_sound/midi/Sequencer/index.html#Sequencer

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Comments
CONVERTED DATA BugTraq+ Release Management Values COMMIT TO FIX: tiger FIXED IN: tiger INTEGRATED IN: tiger tiger-b22
14-06-2004

EVALUATION ###@###.### 2002-10-31 Since this bug only occurs in specific cases, postpone the fix to tiger. The position can be well changed with setMicrosecondPosition(), as shown in the Java Sound Demo. ###@###.### 2003-09-26 Fixed anyway with new RealTimeSequencer. I suggest to modify the test case so that it allows the sequencer's tick position to advance in between the calls from setTickPosition and getTickPosition. Also, sequencers should be allowed to have a less-fine resolution that imposed by one tick. Here is an excerpt, how the modified testcase can look like: for(long theTickPosition = 0; theTickPosition < theTickLengthOfSequence; theTickPosition += (theTickLengthOfSequence / 10)) { System.out.println("Now Setting Tick Position To: " + theTickPosition); theSequencer.setTickPosition(theTickPosition); long theCurrentTickPosition = theSequencer.getTickPosition(); System.out.println("IsRunning()=" + theSequencer.isRunning()); System.out.println("Now Current Tick Position Is: " + theCurrentTickPosition); System.out.println(""); try { Thread.sleep(800); } catch (InterruptedException ie) {} // last time, set tick pos to 0 if (theTickPosition>0 && theTickPosition<(theTickLengthOfSequence / 10)) { theTickPosition=(theTickLengthOfSequence / 10); } // 30 = 1/4 * 120, the resolution of the sequence if(Math.abs(theCurrentTickPosition - theTickPosition) > 30) { System.out.println("theCurrentTickPosition != theTickPosition!"); testPassed = false; } }
11-06-2004

PUBLIC COMMENTS Sequencer method, setTickPosition(long) doesnot set the Tick position
10-06-2004