diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5a57269f5df..13517cd7248 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,5 @@
 
+ * Virtualize `IInt8Calibrator` plus subclasses from TensorRT to allow customization ([issue #902](https://github.com/bytedeco/javacpp-presets/issues/902))
  * Replace `requires` with `requires static` in JPMS `.platform` modules ([pull #900](https://github.com/bytedeco/javacpp-presets/pull/900))
  * Add presets for OpenPose 1.6.0 ([pull #898](https://github.com/bytedeco/javacpp-presets/pull/898))
  * Add comparison against MKL in `llvm/samples/polly/MatMulBenchmark.java`
diff --git a/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8Calibrator.java b/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8Calibrator.java
index 42ba999a5d8..394ae21e7fd 100644
--- a/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8Calibrator.java
+++ b/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8Calibrator.java
@@ -33,8 +33,17 @@
 @Namespace("nvinfer1") @Properties(inherit = org.bytedeco.tensorrt.presets.nvinfer.class)
 public class IInt8Calibrator extends Pointer {
     static { Loader.load(); }
+    /** Default native constructor. */
+    public IInt8Calibrator() { super((Pointer)null); allocate(); }
+    /** Native array allocator. Access with {@link Pointer#position(long)}. */
+    public IInt8Calibrator(long size) { super((Pointer)null); allocateArray(size); }
     /** Pointer cast constructor. Invokes {@link Pointer#Pointer(Pointer)}. */
     public IInt8Calibrator(Pointer p) { super(p); }
+    private native void allocate();
+    private native void allocateArray(long size);
+    @Override public IInt8Calibrator position(long position) {
+        return (IInt8Calibrator)super.position(position);
+    }
 
     /**
      *  \brief Get the batch size used for calibration batches.
@@ -48,7 +57,7 @@ public class IInt8Calibrator extends Pointer {
     //!
     //!
     //!
-    public native int getBatchSize();
+    @Virtual(true) public native @Const({false, false, true}) int getBatchSize();
 
     /**
      *  \brief Get a batch of input for calibration.
@@ -70,10 +79,7 @@ public class IInt8Calibrator extends Pointer {
     //!
     //!
     //!
-    public native @Cast("bool") boolean getBatch(@Cast("void**") PointerPointer bindings, @Cast("const char**") PointerPointer names, int nbBindings);
-    public native @Cast("bool") boolean getBatch(@Cast("void**") @ByPtrPtr Pointer bindings, @Cast("const char**") @ByPtrPtr BytePointer names, int nbBindings);
-    public native @Cast("bool") boolean getBatch(@Cast("void**") @ByPtrPtr Pointer bindings, @Cast("const char**") @ByPtrPtr ByteBuffer names, int nbBindings);
-    public native @Cast("bool") boolean getBatch(@Cast("void**") @ByPtrPtr Pointer bindings, @Cast("const char**") @ByPtrPtr byte[] names, int nbBindings);
+    @Virtual(true) public native @Cast("bool") boolean getBatch(@Cast("void**") PointerPointer bindings, @Cast("const char**") PointerPointer names, int nbBindings);
 
     /**
      *  \brief Load a calibration cache.
@@ -95,9 +101,7 @@ public class IInt8Calibrator extends Pointer {
     //!
     //!
     //!
-    public native @Const Pointer readCalibrationCache(@Cast("std::size_t*") @ByRef LongPointer length);
-    public native @Const Pointer readCalibrationCache(@Cast("std::size_t*") @ByRef LongBuffer length);
-    public native @Const Pointer readCalibrationCache(@Cast("std::size_t*") @ByRef long[] length);
+    @Virtual(true) public native @Const Pointer readCalibrationCache(@Cast("std::size_t*") @ByRef LongPointer length);
 
     /**
      *  \brief Save a calibration cache.
@@ -112,12 +116,12 @@ public class IInt8Calibrator extends Pointer {
     //!
     //!
     //!
-    public native void writeCalibrationCache(@Const Pointer ptr, @Cast("std::size_t") long length);
+    @Virtual(true) public native void writeCalibrationCache(@Const Pointer ptr, @Cast("std::size_t") long length);
 
     /**
      *  \brief Get the algorithm used by this calibrator.
      * 
      *  @return The algorithm used by the calibrator.
      *  */
-    public native CalibrationAlgoType getAlgorithm();
+    @Virtual(true) public native CalibrationAlgoType getAlgorithm();
 }
diff --git a/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8EntropyCalibrator.java b/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8EntropyCalibrator.java
index 5386a0ccee7..a4894e02e11 100644
--- a/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8EntropyCalibrator.java
+++ b/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8EntropyCalibrator.java
@@ -26,8 +26,17 @@
 @Namespace("nvinfer1") @Properties(inherit = org.bytedeco.tensorrt.presets.nvinfer.class)
 public class IInt8EntropyCalibrator extends IInt8Calibrator {
     static { Loader.load(); }
+    /** Default native constructor. */
+    public IInt8EntropyCalibrator() { super((Pointer)null); allocate(); }
+    /** Native array allocator. Access with {@link Pointer#position(long)}. */
+    public IInt8EntropyCalibrator(long size) { super((Pointer)null); allocateArray(size); }
     /** Pointer cast constructor. Invokes {@link Pointer#Pointer(Pointer)}. */
     public IInt8EntropyCalibrator(Pointer p) { super(p); }
+    private native void allocate();
+    private native void allocateArray(long size);
+    @Override public IInt8EntropyCalibrator position(long position) {
+        return (IInt8EntropyCalibrator)super.position(position);
+    }
 
     /**
      *  Signal that this is the entropy calibrator.
diff --git a/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8EntropyCalibrator2.java b/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8EntropyCalibrator2.java
index dacd4d80588..959d91ba916 100644
--- a/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8EntropyCalibrator2.java
+++ b/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8EntropyCalibrator2.java
@@ -26,8 +26,17 @@
 @Namespace("nvinfer1") @Properties(inherit = org.bytedeco.tensorrt.presets.nvinfer.class)
 public class IInt8EntropyCalibrator2 extends IInt8Calibrator {
     static { Loader.load(); }
+    /** Default native constructor. */
+    public IInt8EntropyCalibrator2() { super((Pointer)null); allocate(); }
+    /** Native array allocator. Access with {@link Pointer#position(long)}. */
+    public IInt8EntropyCalibrator2(long size) { super((Pointer)null); allocateArray(size); }
     /** Pointer cast constructor. Invokes {@link Pointer#Pointer(Pointer)}. */
     public IInt8EntropyCalibrator2(Pointer p) { super(p); }
+    private native void allocate();
+    private native void allocateArray(long size);
+    @Override public IInt8EntropyCalibrator2 position(long position) {
+        return (IInt8EntropyCalibrator2)super.position(position);
+    }
 
     /**
      *  Signal that this is the entropy calibrator 2.
diff --git a/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8LegacyCalibrator.java b/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8LegacyCalibrator.java
index f5d26380ce3..e0feb123a32 100644
--- a/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8LegacyCalibrator.java
+++ b/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8LegacyCalibrator.java
@@ -26,8 +26,17 @@
 @Namespace("nvinfer1") @Properties(inherit = org.bytedeco.tensorrt.presets.nvinfer.class)
 public class IInt8LegacyCalibrator extends IInt8Calibrator {
     static { Loader.load(); }
+    /** Default native constructor. */
+    public IInt8LegacyCalibrator() { super((Pointer)null); allocate(); }
+    /** Native array allocator. Access with {@link Pointer#position(long)}. */
+    public IInt8LegacyCalibrator(long size) { super((Pointer)null); allocateArray(size); }
     /** Pointer cast constructor. Invokes {@link Pointer#Pointer(Pointer)}. */
     public IInt8LegacyCalibrator(Pointer p) { super(p); }
+    private native void allocate();
+    private native void allocateArray(long size);
+    @Override public IInt8LegacyCalibrator position(long position) {
+        return (IInt8LegacyCalibrator)super.position(position);
+    }
 
     /**
      *  Signal that this is the legacy calibrator.
@@ -50,7 +59,7 @@ public class IInt8LegacyCalibrator extends IInt8Calibrator {
     //!
     //!
     //!
-    public native double getQuantile();
+    @Virtual(true) public native @Const({false, false, true}) double getQuantile();
 
     /**
      *  \brief The fraction (between 0 and 1) of the maximum used to define the regression cutoff when using regression
@@ -65,7 +74,7 @@ public class IInt8LegacyCalibrator extends IInt8Calibrator {
     //!
     //!
     //!
-    public native double getRegressionCutoff();
+    @Virtual(true) public native @Const({false, false, true}) double getRegressionCutoff();
 
     /**
      *  \brief Load a histogram.
@@ -85,9 +94,7 @@ public class IInt8LegacyCalibrator extends IInt8Calibrator {
     //!
     //!
     //!
-    public native @Const Pointer readHistogramCache(@Cast("std::size_t*") @ByRef LongPointer length);
-    public native @Const Pointer readHistogramCache(@Cast("std::size_t*") @ByRef LongBuffer length);
-    public native @Const Pointer readHistogramCache(@Cast("std::size_t*") @ByRef long[] length);
+    @Virtual(true) public native @Const Pointer readHistogramCache(@Cast("std::size_t*") @ByRef LongPointer length);
 
     /**
      *  \brief Save a histogram cache.
@@ -97,5 +104,5 @@ public class IInt8LegacyCalibrator extends IInt8Calibrator {
      * 
      *  @see readHistogramCache()
      *  */
-    public native void writeHistogramCache(@Const Pointer ptr, @Cast("std::size_t") long length);
+    @Virtual(true) public native void writeHistogramCache(@Const Pointer ptr, @Cast("std::size_t") long length);
 }
diff --git a/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8MinMaxCalibrator.java b/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8MinMaxCalibrator.java
index 22ca94a2828..5d22440db71 100644
--- a/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8MinMaxCalibrator.java
+++ b/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IInt8MinMaxCalibrator.java
@@ -26,8 +26,17 @@
 @Namespace("nvinfer1") @Properties(inherit = org.bytedeco.tensorrt.presets.nvinfer.class)
 public class IInt8MinMaxCalibrator extends IInt8Calibrator {
     static { Loader.load(); }
+    /** Default native constructor. */
+    public IInt8MinMaxCalibrator() { super((Pointer)null); allocate(); }
+    /** Native array allocator. Access with {@link Pointer#position(long)}. */
+    public IInt8MinMaxCalibrator(long size) { super((Pointer)null); allocateArray(size); }
     /** Pointer cast constructor. Invokes {@link Pointer#Pointer(Pointer)}. */
     public IInt8MinMaxCalibrator(Pointer p) { super(p); }
+    private native void allocate();
+    private native void allocateArray(long size);
+    @Override public IInt8MinMaxCalibrator position(long position) {
+        return (IInt8MinMaxCalibrator)super.position(position);
+    }
 
     /**
      *  Signal that this is the MinMax Calibrator.
diff --git a/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/ILogger.java b/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/ILogger.java
index 75d3f4a82b7..6a111a9d594 100644
--- a/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/ILogger.java
+++ b/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/ILogger.java
@@ -30,8 +30,17 @@
 @Namespace("nvinfer1") @Properties(inherit = org.bytedeco.tensorrt.presets.nvinfer.class)
 public class ILogger extends Pointer {
     static { Loader.load(); }
+    /** Default native constructor. */
+    public ILogger() { super((Pointer)null); allocate(); }
+    /** Native array allocator. Access with {@link Pointer#position(long)}. */
+    public ILogger(long size) { super((Pointer)null); allocateArray(size); }
     /** Pointer cast constructor. Invokes {@link Pointer#Pointer(Pointer)}. */
     public ILogger(Pointer p) { super(p); }
+    private native void allocate();
+    private native void allocateArray(long size);
+    @Override public ILogger position(long position) {
+        return (ILogger)super.position(position);
+    }
 
     /**
      *  \enum Severity
@@ -64,9 +73,4 @@ public enum Severity {
      *  @param msg The log message, null terminated.
      *  */
     @Virtual(true) public native void log(Severity severity, String msg);
-
-    
-    /** Default native constructor. */
-    public ILogger() { super((Pointer)null); allocate(); }
-    private native void allocate();
 }
diff --git a/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IProfiler.java b/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IProfiler.java
index ddc58e8aebf..540ce1d28a3 100644
--- a/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IProfiler.java
+++ b/tensorrt/src/gen/java/org/bytedeco/tensorrt/nvinfer/IProfiler.java
@@ -32,8 +32,17 @@
 @Namespace("nvinfer1") @Properties(inherit = org.bytedeco.tensorrt.presets.nvinfer.class)
 public class IProfiler extends Pointer {
     static { Loader.load(); }
+    /** Default native constructor. */
+    public IProfiler() { super((Pointer)null); allocate(); }
+    /** Native array allocator. Access with {@link Pointer#position(long)}. */
+    public IProfiler(long size) { super((Pointer)null); allocateArray(size); }
     /** Pointer cast constructor. Invokes {@link Pointer#Pointer(Pointer)}. */
     public IProfiler(Pointer p) { super(p); }
+    private native void allocate();
+    private native void allocateArray(long size);
+    @Override public IProfiler position(long position) {
+        return (IProfiler)super.position(position);
+    }
 
     /**
      *  \brief Layer time reporting callback.
@@ -42,9 +51,4 @@ public class IProfiler extends Pointer {
      *  @param ms The time in milliseconds to execute the layer.
      *  */
     @Virtual(true) public native void reportLayerTime(String layerName, float ms);
-
-    
-    /** Default native constructor. */
-    public IProfiler() { super((Pointer)null); allocate(); }
-    private native void allocate();
 }
diff --git a/tensorrt/src/main/java/org/bytedeco/tensorrt/presets/nvinfer.java b/tensorrt/src/main/java/org/bytedeco/tensorrt/presets/nvinfer.java
index f20aab949a6..2b93346dcd9 100644
--- a/tensorrt/src/main/java/org/bytedeco/tensorrt/presets/nvinfer.java
+++ b/tensorrt/src/main/java/org/bytedeco/tensorrt/presets/nvinfer.java
@@ -114,19 +114,12 @@ public void map(InfoMap infoMap) {
                .put(new Info("nvinfer1::EnumMax").skip())
                .put(new Info("nvinfer1::Weights::values").javaText("public native @Const Pointer values(); public native Weights values(Pointer values);"))
                .put(new Info("nvinfer1::IRaggedSoftMaxLayer", "nvinfer1::IIdentityLayer", "nvinfer1::ISoftMaxLayer",
-                             "nvinfer1::IConcatenationLayer", "nvinfer1::IInt8EntropyCalibrator", "nvinfer1::IInt8EntropyCalibrator2",
-                             "nvinfer1::IInt8MinMaxCalibrator", "nvinfer1::IParametricReLULayer", "nvinfer1::IShapeLayer", "nvinfer1::ISelectLayer").purify())
+                             "nvinfer1::IConcatenationLayer", "nvinfer1::IParametricReLULayer", "nvinfer1::IShapeLayer", "nvinfer1::ISelectLayer").purify())
                .put(new Info("nvinfer1::IGpuAllocator::free").javaNames("_free"))
-               .put(new Info("nvinfer1::IProfiler", "nvinfer1::ILogger").purify().virtualize())
+               .put(new Info("nvinfer1::IProfiler", "nvinfer1::ILogger", "nvinfer1::IInt8Calibrator", "nvinfer1::IInt8EntropyCalibrator",
+                             "nvinfer1::IInt8EntropyCalibrator2", "nvinfer1::IInt8MinMaxCalibrator", "nvinfer1::IInt8LegacyCalibrator").virtualize())
                .put(new Info("nvinfer1::IPluginRegistry::getPluginCreatorList").javaText(
                              "public native @Cast(\"nvinfer1::IPluginCreator*const*\") PointerPointer getPluginCreatorList(IntPointer numCreators);"))
-               .put(new Info("nvinfer1::IProfiler::~IProfiler").javaText("\n"
-                     + "/** Default native constructor. */\n"
-                     + "public IProfiler() { super((Pointer)null); allocate(); }\n"
-                     + "private native void allocate();\n"))
-               .put(new Info("nvinfer1::ILogger::~ILogger").javaText("\n"
-                     + "/** Default native constructor. */\n"
-                     + "public ILogger() { super((Pointer)null); allocate(); }\n"
-                     + "private native void allocate();\n"));
+        ;
     }
 }