From 866530fb047cd17af6bd2dbbde5f5cb35f876840 Mon Sep 17 00:00:00 2001
From: openvino-pushbot <openvino_pushbot@intel.com>
Date: Tue, 16 Oct 2018 13:45:03 +0300
Subject: Publishing R3

---
 .../mo/front/kaldi/extractors/reshape.py           | 68 ++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 model-optimizer/mo/front/kaldi/extractors/reshape.py

(limited to 'model-optimizer/mo/front/kaldi/extractors/reshape.py')

diff --git a/model-optimizer/mo/front/kaldi/extractors/reshape.py b/model-optimizer/mo/front/kaldi/extractors/reshape.py
new file mode 100644
index 000000000..cf47f67ab
--- /dev/null
+++ b/model-optimizer/mo/front/kaldi/extractors/reshape.py
@@ -0,0 +1,68 @@
+"""
+ Copyright (c) 2018 Intel Corporation
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+"""
+import numpy as np
+
+from mo.front.common.partial_infer.reshape import tf_reshape_shape_infer
+from mo.front.common.partial_infer.utils import int64_array
+from mo.front.extractor import FrontExtractorOp
+from mo.graph.graph import Node
+from mo.ops.op import Op
+from mo.ops.reshape import Reshape
+
+
+class ReshapeFrontExtractor(FrontExtractorOp):
+    op = 'reshape'
+    enabled = True
+
+    @staticmethod
+    def extract(node):
+        mapping_rule = {
+            'dim': node.pb.dim if hasattr(node.pb, 'dim') else None,
+            'axis': node.pb.axis,
+            'num_axes': node.pb.num_axes,
+            'infer': ReshapeFrontExtractor.infer
+        }
+        Op.get_op_class_by_name('Reshape').update_node_stat(node, mapping_rule)
+        return __class__.enabled
+
+    @staticmethod
+    def infer(node: Node):
+        in_node = node.in_node().in_node()  # prev_layer_node -> data -> this_node
+        input_shape = node.in_node().shape
+        # Kaldi Reshape hugely depends on the layers that precedes or succeeds
+        # Convolution/Pooling layers. Therefore there are 4 cases with different
+        # partial inference.
+        batch = input_shape[0]
+        if in_node.type == 'Convolution' or in_node.type == 'Pooling':
+            output_spatial = int64_array([batch, np.prod(input_shape[1:])])
+            return ReshapeFrontExtractor.set_shape_and_dim(node, output_spatial)
+        # Supports ONLY NCHW and NH layouts
+        spatial_shape = input_shape[1]
+        if input_shape.shape == (4,):
+            spatial_shape = input_shape[2:3]
+        out_node = node.out_node().out_node()
+        if out_node.type == 'Convolution':
+            output_spatial = int64_array([batch, int(np.ceil(spatial_shape / out_node.patch_stride)), 1, out_node.patch_stride])
+            return ReshapeFrontExtractor.set_shape_and_dim(node, output_spatial)
+        elif out_node.type == 'Pooling':
+            output_spatial = int64_array([batch, out_node.pool_stride, 1, int(np.ceil(spatial_shape / out_node.pool_stride))])
+            return ReshapeFrontExtractor.set_shape_and_dim(node, output_spatial)
+
+    @staticmethod
+    def set_shape_and_dim(node: Node, reshape_dim):
+        Reshape.update_node_stat(node, {'dim': reshape_dim})
+        node.out_node().shape = reshape_dim
+
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