content: package com.airbnb.lottie.animation.keyframe;
  
  import com.airbnb.lottie.utils.MiscUtils;
  import com.airbnb.lottie.value.Keyframe;
  
  import java.util.List;
  
  public class FloatKeyframeAnimation extends KeyframeAnimation<Float> {
  
    public FloatKeyframeAnimation(List<Keyframe<Float>> keyframes) {
      super(keyframes);
    }
  
    @Override Float getValue(Keyframe<Float> keyframe, float keyframeProgress) {
      return getFloatValue(keyframe, keyframeProgress);
    }
  
    /**
     * Optimization to avoid autoboxing.
     */
    float getFloatValue(Keyframe<Float> keyframe, float keyframeProgress) {
      if (keyframe.startValue == null || keyframe.endValue == null) {
        throw new IllegalStateException("Missing values for keyframe.");
      }
  
      if (valueCallback != null) {
        //noinspection ConstantConditions
        Float value = valueCallback.getValueInternal(keyframe.startFrame, keyframe.endFrame,
            keyframe.startValue, keyframe.endValue,
            keyframeProgress, getLinearCurrentKeyframeProgress(), getProgress());
        if (value != null) {
          return value;
        }
      }
  
      return MiscUtils.lerp(keyframe.getStartValueFloat(), keyframe.getEndValueFloat(), keyframeProgress);
    }
  
    /**
     * Optimization to avoid autoboxing.
     */
    public float getFloatValue() {
      return getFloatValue(getCurrentKeyframe(), getInterpolatedCurrentKeyframeProgress());
    }
  }
  