COMPMID-1849: Implement CPPDetectionPostProcessLayer

* Add DetectionPostProcessLayer
* Add DetectionPostProcessLayer at the graph

Change-Id: I7e56f6cffc26f112d26dfe74853085bb8ec7d849
Signed-off-by: Isabella Gottardi <isabella.gottardi@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1639
Reviewed-by: Giuseppe Rossini <giuseppe.rossini@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/arm_compute/graph/frontend/Layers.h b/arm_compute/graph/frontend/Layers.h
index 3fc4af46d5..27a0cd3026 100644
--- a/arm_compute/graph/frontend/Layers.h
+++ b/arm_compute/graph/frontend/Layers.h
@@ -493,6 +493,39 @@ private:
     SubStream                _ss_prior;
     DetectionOutputLayerInfo _detect_info;
 };
+/** DetectionOutputPostProcess Layer */
+class DetectionPostProcessLayer final : public ILayer
+{
+public:
+    /** Construct a detection output layer.
+     *
+     * @param[in] sub_stream_class_prediction Class prediction graph sub-stream.
+     * @param[in] detect_info                 DetectionOutput parameters.
+     * @param[in] anchors                     Accessor to get anchors tensor data from.
+     * @param[in] out_quant_info              (Optional) Output quantization info
+     */
+    DetectionPostProcessLayer(SubStream &&sub_stream_class_prediction, DetectionPostProcessLayerInfo detect_info, ITensorAccessorUPtr anchors,
+                              const QuantizationInfo out_quant_info = QuantizationInfo())
+        : _sub_stream_class_prediction(std::move(sub_stream_class_prediction)), _detect_info(detect_info), _anchors(std::move(anchors)), _out_quant_info(std::move(out_quant_info))
+    {
+    }
+
+    NodeID create_layer(IStream &s) override
+    {
+        ARM_COMPUTE_ERROR_ON(_anchors == nullptr);
+
+        NodeParams  common_params          = { name(), s.hints().target_hint };
+        NodeIdxPair input_box_encoding     = { s.tail_node(), 0 };
+        NodeIdxPair input_class_prediction = { _sub_stream_class_prediction.tail_node(), 0 };
+        return GraphBuilder::add_detection_post_process_node(s.graph(), common_params, input_box_encoding, input_class_prediction, _detect_info, std::move(_anchors), std::move(_out_quant_info));
+    }
+
+private:
+    SubStream                     _sub_stream_class_prediction;
+    DetectionPostProcessLayerInfo _detect_info;
+    ITensorAccessorUPtr           _anchors;
+    const QuantizationInfo        _out_quant_info;
+};
 /** Dummy Layer */
 class DummyLayer final : public ILayer
 {