COMPMID-1750: Add PriorBox operator to graph API.

Change-Id: I5d2ed5dcc342abff8124762f7bdee587cdf20032

1 files changed, 95 insertions, 0 deletions

diff --git a/src/graph/nodes/PriorBoxLayerNode.cpp b/src/graph/nodes/PriorBoxLayerNode.cpp
new file mode 100644
index 0000000000..edb1fba255
--- /dev/null
+++ b/src/graph/nodes/PriorBoxLayerNode.cpp
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "arm_compute/graph/nodes/PriorBoxLayerNode.h"
+
+#include "arm_compute/core/Utils.h"
+#include "arm_compute/graph/Graph.h"
+#include "arm_compute/graph/INodeVisitor.h"
+#include "arm_compute/graph/Utils.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+PriorBoxLayerNode::PriorBoxLayerNode(PriorBoxLayerInfo prior_info)
+    : _info(std::move(prior_info))
+{
+    _input_edges.resize(2, EmptyEdgeID);
+    _outputs.resize(1, NullTensorID);
+}
+
+PriorBoxLayerInfo PriorBoxLayerNode::priorbox_info() const
+{
+    return _info;
+}
+
+TensorDescriptor PriorBoxLayerNode::compute_output_descriptor(const TensorDescriptor &input_descriptor,
+                                                              const PriorBoxLayerInfo &info)
+{
+    const unsigned int layer_width  = get_dimension_size(input_descriptor, DataLayoutDimension::WIDTH);
+    const unsigned int layer_height = get_dimension_size(input_descriptor, DataLayoutDimension::HEIGHT);
+    const unsigned int num_priors   = info.aspect_ratios().size() * info.min_sizes().size() + info.max_sizes().size();
+
+    TensorDescriptor output_descriptor = input_descriptor;
+    output_descriptor.shape.set(0, layer_width * layer_height * num_priors * 4);
+    output_descriptor.shape.set(1, 2);
+    output_descriptor.shape.set(2, 1);
+
+    return output_descriptor;
+}
+
+bool PriorBoxLayerNode::forward_descriptors()
+{
+    if((input_id(0) != NullTensorID) && (output_id(0) != NullTensorID))
+    {
+        Tensor *dst = output(0);
+        ARM_COMPUTE_ERROR_ON(dst == nullptr);
+        dst->desc() = configure_output(0);
+        return true;
+    }
+    return false;
+}
+
+TensorDescriptor PriorBoxLayerNode::configure_output(size_t idx) const
+{
+    ARM_COMPUTE_UNUSED(idx);
+    ARM_COMPUTE_ERROR_ON(idx >= _outputs.size());
+
+    const Tensor *input0 = input(0);
+    ARM_COMPUTE_ERROR_ON(input0 == nullptr);
+
+    return compute_output_descriptor(input0->desc(), _info);
+}
+
+NodeType PriorBoxLayerNode::type() const
+{
+    return NodeType::PriorBoxLayer;
+}
+
+void PriorBoxLayerNode::accept(INodeVisitor &v)
+{
+    v.visit(*this);
+}
+} // namespace graph
+} // namespace arm_compute