Forum Discussion

scrager's avatar
scrager
Visitor
16 years ago

audio roSpringBoardScreen progress indicator

Is it possible to sync the progress indicator on a spring board screen to a playing audio player automatically?

If not, I assume that in the while loop that waits for events, the wait command needs to wait for a period of time, not 0. On each loop, calculate the time played and adjust the progress indicator accordingly.

So i tried that, but I am not sure of a good way to calculate time. I tried this:


playstart = uptime(0)
maxplay = 190

while true
   msg = wait(1000,port)

   ....

   playtime = uptime(0) - playstart
  screen.setprogressindicator(int(playtime),maxplay)

end while


but uptime does not seem to count in seconds even though the documentation says it does. it seems to count 1/10 second for every real second, but it is not consistent.

So is my calculation wrong? Is there a better way to calculate time or am I going about this wrong? I did not see any progress indicators in any of the sample code.
Roku Developer Program

4 Replies

  • scrager's avatar
    scrager
    Visitor
    16 years ago
    I found the roDateTime object that seems to work a lot better than uptime

    I'd still like to know if it is possible to sync a springboard screen to a player to have the progress indicator updated automatically.
  • evilmax17's avatar
    evilmax17
    Visitor
    15 years ago
    Bump.

    Are there best practices for keeping track of audio progress? None of the examples in the SDK use SetProgressIndicator.
  • RokuKevin's avatar
    RokuKevin
    Visitor
    15 years ago
    Greubel's example is the best way to do it currently. The Roku does not send audio progress events, so you must keep track of the time in your app.

    --Kevin
  • TheEndless's avatar
    TheEndless
    Channel Surfer
    15 years ago
    gruebel's example looks like it will get out of sync if the wait loop receives any valid messages. As scrager suggested, I'd recommend using an roDateTime object for better accuracy.

    I do something like this...

    content = { mycontent }

    playbackTimer = CreateObject( "roDateTime" )
    isPlaying = False
    isPaused = False
    isBuffering = False

    content.CurrentPosition = 0
    audioPlayer.SetContentList( [ content ] )
    audioPlayer.Play()
    While True
    	msg = Wait( 1000, audioPlayer.GetMessagePort() )
    	If msg <> invalid Then
    		If msg.IsRequestFailed() Or msg.IsPartialResult() Or msg.IsFullResult()Then
    			isBuffering = False
    			isPlaying = False
    			Exit While
    		Else If msg.IsPaused() Then
    			' We paused, so record the current playback timer position
    			content.CurrentPosition = content.CurrentPosition + playbackTimer.TotalSeconds()
    			isPlaying = False
    			isPaused = True
    		Else If msg.IsResumed() Then
    			' We resumed, so restart the playback timer
    			m.PlaybackTimer.Mark()
    			isPlaying = True
    			isPaused = False
    		Else If msg.IsStatusMessage() Then
    			If msg.GetMessage() = "startup progress" Then
    				isBuffering = True
    				' Show buffering message here
    				' Should also reset playback timer if isPlaying = True
    			Else If msg.GetMessage() = "start of play" Then
    				' Start the playback timer
    				playbackTimer.Mark()
    				isPlaying = True
    				isBuffering = False
    			End If	
    		End If
    	End If
    End While