Hi to all,
in my application (an audio editor) I have a callback that emit a signal when a sound stop playing so:
Qt Code: 
  1. //! Executed when a sound finish playing
  2. FMOD_RESULT F_CALLBACK endCallback(FMOD_CHANNEL *channel, FMOD_CHANNEL_CALLBACKTYPE type, 
  3. 								   unsigned int commanddata1, unsigned int commanddata2)
  4. {
  5. 	(void)commanddata1; // Unused (to avoid warnings)
  6. 	(void)commanddata2; // Unused (to avoid warnings)
  7.  
  8. 	SoundData* currentSound; 
  9.  
  10. 	switch(type)
  11. 	{
  12. 	case FMOD_CHANNEL_CALLBACKTYPE_END:
  13. 		{
  14. 			FMOD_RESULT result;
  15. 			FMOD::Channel *currentChannel = (FMOD::Channel *)channel;
  16.  
  17. 			void *ud = NULL;
  18. 			result = currentChannel->getUserData( &ud );			
  19.  
  20. 			/* inform that sound stopped */
  21. 			emit AudioDevice::getInstance()->soundStopped();
  22. 			break;
  23. 		}
  24. 	default:
  25. 		break;
  26. 	}
  27.  
  28. 	return FMOD_OK;
  29. }
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in the application I have 2 WaveWidgets ( waveform display ) having a slot connected to the signal emitted from the callback so:
Qt Code: 
  1. /************************************************************************/
  2. /* Constructor                                                          */
  3. /************************************************************************/
  4. WaveWidget::WaveWidget( QWidget* parent /* = 0 */ )
  5.  : QWidget( parent ),
  6.    m_wave( 0 ),
  7.    rb( 0 ),
  8.    m_CurrentTimePosition( 0 )
  9. {
  10. 	setFocusPolicy( Qt::TabFocus );
  11. 	timer = new QTimer();
  12.  
  13. 	connect( timer,  SIGNAL( timeout() ), this, SLOT( setCurrentTimePosition() ) );
  14. 	connect( AudioDevice::getInstance(), SIGNAL( soundStopped() ), this, SLOT( stopTimer() ), Qt::QueuedConnection );
  15. }
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The stopTimer slot of the WaveWidget reset the timeLine to position 0 so:
Qt Code: 
  1. /************************************************************************/
  2. /* stopTimer                                                            */  
  3. /************************************************************************/ 
  4. void WaveWidget::stopTimer()
  5. {
  6. 	timer->stop();
  7. 	qDebug() << "Timer stopped";
  8. 	resetTimeline();
  9. }
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and
Qt Code: 
  1. /************************************************************************/
  2. /* resetTimeline                                                        */  
  3. /************************************************************************/ 
  4. void WaveWidget::resetTimeline()
  5. {
  6. 	int h = height();
  7. 	QRect r = QRect( 0 , 0, m_CurrentTimePosition + 1, h );
  8. 	// reset timeline
  9. 	update( r );
  10. 	// reset current value
  11. 	m_CurrentTimePosition = 0;
  12. 	// delete rubberband if one
  13. 	if( rb )
  14. 	{
  15. 		delete rb;
  16. 		rb = 0;
  17. 	}
  18. }
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The problem is that when 1 of the 2 playing sounds stop playing ALL WaveWidget are informed of that and ALL reset their timeLine to 0 instead of only the right WaveWidget that efectively has its sound stopped.
How can I solve this problem?

I hope to get help.
Best Regards,
Franco