Waveform how to get playback position?

[d.healey]

I can see a function to set the playback position, but how do we get it?

My idea is to create a pause button. So the user clicks play, the audio file plays back, they hit pause and it stores the position, when they hit play again I resume from that position.

[ulrik]

@d-healey is it not

AudioFile.getCurrentlyDisplayedIndex()

?

[d.healey]

@ulrik Yes, if I had an audio file, but I have a waveform control linked to a sampler.

[ulrik]

@d-healey Oh, ok I see

[d.healey]

@Christoph-Hart Any pointers?

[d.healey]

Still haven't found a solution to this one. Also it seems ScriptAudioWaveform.setPlaybackPosition() doesn't do anything, at least when it's connected to a sampler?

[clevername27]

@d-healey Do you recall if this was ever resolved?

[d.healey]

@clevername27 Not according to my last post here :)

[clevername27]

@d-healey I'm baffled how anyone is able to ship a HISE-product. Obviously they do, but I am legit baffled.

[A Former User]

@clevername27 These are edge-cases, the primary modules & UI elements are very well made and stable :)

[clevername27]

@iamlamprey I appreciate your response. I do not believe there is a such a thing as an "edge case". An API either works, or it doesn't.

[Orvillain]

Surely the sampler itself should be reporting this, not the WaveForm view ???

My brain looks at this problem more along these lines:

• Get sampler.
• Get currently playing file.
• Get sample position for currently playing file.
• Use a ScriptPanel and a timer.
• Convert sample position into a pixel value.
• Draw a vertical line at the pixel value on the X axis, and as tall as you need it on the Y axis.
• Each time you want to update the position, clear the old line, and draw a new line.

This ScriptPanel would be placed over the top of the existing waveform panel.

This is more or less how I did my sample start/end and loop start/end mechanics.

The only thing I haven't done is any kind of update logic. But I'm sure it is possible. Provided you can get the data from the sampler or currently playing audio file.

[clevername27]

@Orvillain Thank you - I'm confused, though, because I don't want to use a sampler. I just want to play an audio file. And HISE has a Module to do that:

Except, like so many things in HISE, it doesn't do that.

[ulrik]

@Orvillain said in Waveform how to get playback position?:

Surely the sampler itself should be reporting this, not the WaveForm view ???

My brain looks at this problem more along these lines:

• Get sampler.
• Get currently playing file.
• Get sample position for currently playing file.

I'm sorry to dig in this old topic.
As I undertand, you are using a sampler for this right?
Could you please explain, or make a very small snippet, how to get the play position of the file?

[ulrik]

@d-healey said in Waveform how to get playback position?:

@ulrik Yes, if I had an audio file, but I have a waveform control linked to a sampler.

Did you find a solution for this?

[HISEnberg]

@Christoph-Hart I'm gonna add a bump to this topic to see if there is any progress. I feel like if there is a ScriptAudioWaveform.setPlaybackPosition() then it should be fairly trivial to add a ScriptAudioWaveform.getPlaybackPosition().

[Christoph Hart]

@HISEnberg use a broadcaster with the AudioFile.Display event type:

const var playbackWatcher = Engine.createBroadcaster({
  "id": "playbackWatcher",
  "args": ["processor", "index", "value"],
  "tags": []
});

// Note that DisplayIndex doesn't work in the previous HISE version (it expects AudioFile.Display)
// so if you use the broadcaster wizard like I did here it will spit out non-working code.
playbackWatcher.attachToComplexData("AudioFile.DisplayIndex", "Audio Loop Player1", 0, "");

inline function onPlaybackUpdate(p, i, v)
{
	Console.print(v);
};

playbackWatcher.addListener(0, "show the playback position", onPlaybackUpdate);

[HISEnberg]

@Christoph-Hart Nice yes this is a bit more elegant than what I figured out yesterday. I actually just used a variable in the drawThumbnailRuler so I could yank the obj.xPosition and pass it to my panel. Your version is giving the actual sample value so it seems preferable:

reg thumbnailXPos = 0.0;
Laf_Waveform.registerFunction("drawThumbnailRuler", function(g, obj)
{
    thumbnailXPos = obj.xPosition;
    Console.print(thumbnailXPos);
});

// Then I just pass thumbnailXPos over to the panel....

[Christoph Hart]

@HISEnberg said in Waveform how to get playback position?:

Your version is giving the actual sample value so it seems preferable:

It also runs if your waveform is not visible.