Tempo changes in tempoSequence are not updated immediatelly

Tracktion Engine
1

Hi, maybe the title is not a good description of the problem, so sorry for This!

Problem actually is:

On a project if I insert a new tempo in a tempoSequence it is not updated immediately:

for example in my MainComponent constructor I wrote this:

    MainComponent::MainComponent()
{
    setSize (1000, 600);
    edit.reset(new tracktion_engine::Edit{engine, tracktion_engine::createEmptyEdit(), tracktion_engine::Edit::forEditing, nullptr, 0});
    edit->tempoSequence.getTempoAt(0).setBpm(120);
    edit->tempoSequence.getTempoAt(0).setCurve(0.0);
    edit->tempoSequence.insertTempo(4, 120, 0.0);
    edit->tempoSequence.insertTempo(4, 300, 0.0);
    edit->tempoSequence.insertTempo(8, 300, 0.0);        
    for (auto tempo : edit->tempoSequence.getTempos())
    {
        DBG(tempo->getStartTime());
    }
}

It prints: 0 0 0 0 (It happens also if I put the cycle in resized() method for example). I noticed (putting cycle in a timerCallback) that those values are updated only after a while (printing correctly 0 2 2 2.8).

Why? Problem obviously rise because some of my classes needs to know “tempo->getStartTime()” values to do some stuff immediately when Program is launched.

Thank you in advice!

2

Thanks for reporting. Should be fixed here: https://github.com/Tracktion/tracktion_engine/commit/6f361787eb671da296a8a567fb0385e77011636a

I also added some tests and more documentation.

1 Like
3

Really really great!

Thanks for big work you’re doing!

4

I tried it: now it works, but in compile time two error rise up:

  1. line 172 of tracktion_DeviceManager.cpp (in func removeHostedAudioDeviceInsterfaces())
  2. line 321 of tracktion_HostedAudioDevice.cpp, to solve I add .get() to dm.deviceManager.addAudioDeviceType (std::unique_ptr(deviceType).get());
5

Maybe you need to update JUCE?

6

I’m using Juce 5.4.5, to be sure I’ve just download again from website…

7

You’ll need to use the develop branch from GitHub.
If you look here: https://github.com/Tracktion/tracktion_engine/tree/develop/modules
you’ll see the juce commit we’re building against (currently https://github.com/WeAreROLI/JUCE/tree/1003579c5acbf091370a6ca3df4c4d5031056206).

In general we always build against the tip of JUCE develop as we need the most recent additions for some Engine features.

2 Likes
8

Ok thank you! :slight_smile: