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Add NDArray stopGradient and scaleGradient #548

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merged 1 commit into from
Jan 21, 2021
Merged

Add NDArray stopGradient and scaleGradient #548

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18 changes: 18 additions & 0 deletions api/src/main/java/ai/djl/ndarray/NDArray.java
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Original file line number Diff line number Diff line change
Expand Up @@ -216,6 +216,24 @@ default byte[] encode() {
*/
boolean hasGradient();

/**
* Returns an NDArray equal to this that stop gradient propagation through it.
*
* @return an NDArray equal to this that stops gradient propagation through it
*/
NDArray stopGradient();

/**
* Returns an NDArray equal to this that magnifies the gradient propagated to this by a
* constant.
*
* @param scale how to much to magnify the gradient propagated to this
* @return an NDArray equal to this that magnifies the gradient propagated to this by a constant
*/
default NDArray scaleGradient(double scale) {
return this.mul(scale).add(this.stopGradient().mul(1 - scale));
}

/**
* Returns the size of this {@code NDArray} along a given axis.
*
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6 changes: 6 additions & 0 deletions dlr/dlr-engine/src/main/java/ai/djl/dlr/engine/DlrNDArray.java
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Expand Up @@ -154,6 +154,12 @@ public boolean hasGradient() {
return false;
}

/** {@inheritDoc} */
@Override
public NDArray stopGradient() {
throw new UnsupportedOperationException("Not supported for DLR");
}

/** {@inheritDoc} */
@Override
public ByteBuffer toByteBuffer() {
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5 changes: 5 additions & 0 deletions mxnet/mxnet-engine/src/main/java/ai/djl/mxnet/engine/MxNDArray.java
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Expand Up @@ -268,6 +268,11 @@ public boolean hasGradient() {
return hasGradient;
}

@Override
public NDArray stopGradient() {
return manager.invoke("stop_gradient", this, null);
}

/** {@inheritDoc} */
@Override
public ByteBuffer toByteBuffer() {
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6 changes: 6 additions & 0 deletions onnxruntime/onnxruntime-engine/src/main/java/ai/djl/onnxruntime/engine/OrtNDArray.java
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Expand Up @@ -165,6 +165,12 @@ public boolean hasGradient() {
return false;
}

/** {@inheritDoc} */
@Override
public NDArray stopGradient() {
throw new UnsupportedOperationException("Not supported for ONNX Runtime");
}

/** {@inheritDoc} */
@Override
public ByteBuffer toByteBuffer() {
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6 changes: 6 additions & 0 deletions paddlepaddle/paddlepaddle-engine/src/main/java/ai/djl/paddlepaddle/engine/PpNDArray.java
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Expand Up @@ -177,6 +177,12 @@ public boolean hasGradient() {
return false;
}

/** {@inheritDoc} */
@Override
public NDArray stopGradient() {
throw new UnsupportedOperationException("Not supported");
}

/** {@inheritDoc} */
@Override
public ByteBuffer toByteBuffer() {
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6 changes: 6 additions & 0 deletions pytorch/pytorch-engine/src/main/java/ai/djl/pytorch/engine/PtNDArray.java
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Expand Up @@ -199,6 +199,12 @@ public boolean hasGradient() {
return hasGradient;
}

/** {@inheritDoc} */
@Override
public NDArray stopGradient() {
throw new UnsupportedOperationException("Not supported");
}

/** {@inheritDoc} */
@Override
public ByteBuffer toByteBuffer() {
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6 changes: 6 additions & 0 deletions tensorflow/tensorflow-engine/src/main/java/ai/djl/tensorflow/engine/TfNDArray.java
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Original file line number Diff line number Diff line change
Expand Up @@ -178,6 +178,12 @@ public boolean hasGradient() {
return false;
}

/** {@inheritDoc} */
@Override
public NDArray stopGradient() {
throw new UnsupportedOperationException("Not implemented");
}

/** {@inheritDoc} */
@Override
public double[] toDoubleArray() {
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6 changes: 6 additions & 0 deletions tflite/tflite-engine/src/main/java/ai/djl/tflite/engine/TfLiteNDArray.java
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Expand Up @@ -192,6 +192,12 @@ public boolean hasGradient() {
return false;
}

/** {@inheritDoc} */
@Override
public NDArray stopGradient() {
throw new UnsupportedOperationException("Not supported for TFLite");
}

/** {@inheritDoc} */
@Override
public ByteBuffer toByteBuffer() {
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