Feature: A param that send a float when no audio

[liudger]

Oculus has a sil param that gives a 1 if there is no audio. You can make a param in uLipSync that has silence but this value also goes to 0 if there is no audio. So it would be nice to have a fall back for this.

Is this also something we want for the other system (blendshape, textures etc) or only the animator? Should it be processed in the core? Or can I build something in the animator.

[liudger]

I am a bit confused. When I print out the params weight the sil is at 1. But the animator (controller) parameter is not 1 but 0. Is there another calculation that changes this value?

    void UpdateVowels()
    {
        float sum = 0f;
		float total = 0f;
        var ratios = _info.phonemeRatios;

        foreach (var param in parameters)
        {
            float targetWeight = 0f;
            if (ratios != null && !string.IsNullOrEmpty(param.phoneme))
            {
                ratios.TryGetValue(param.phoneme, out targetWeight);
            }
            float weightVel = param.weightVelocity;
            param.weight = SmoothDamp(param.weight, targetWeight, ref weightVel, minimalValueThreshold);
            param.weightVelocity = weightVel;
            sum += param.weight;
        }

        foreach (var param in parameters)
        {
            param.weight = sum > 0f ? param.weight / sum : 0f;
	    Debug.Log("param: " + param.name + " weight: " + param.weight);
        }
        

[liudger]

Ah I found the issue.

    void OnApplyAnimator()
    {
        if (!animator) return;

        foreach (var param in parameters)
        {
            if (param.index < 0) continue;
            animator.SetFloat(param.nameHash, 0f);
        }

        foreach (var param in parameters)
        {
            if (param.index < 0) continue;
            float weight = animator.GetFloat(param.nameHash);
            weight += param.weight * param.maxWeight * volume;
            animator.SetFloat(param.nameHash, weight);
        }
    }

for param sil it shouldn't multiply the volume. What do you think a good workaround for this is?
Maybe a default parameter that is always there for silence? this we could hardcode to skip volume? Or extra button on the parameter that it should skip volume

[liudger]

I guess this solved the issue. Need to test it
#57