def replace_ctc_greedy_decoder(graph: Graph, match: dict):
ctc_greedy_decoder_tf = match['decoder']
cast = match['cast']
sparse_to_dense = match['sparse_to_dense']
sparse_to_dense_name = sparse_to_dense.soft_get('name', sparse_to_dense.id)
ctc_greedy_decoder_tf_name = ctc_greedy_decoder_tf.soft_get('name', ctc_greedy_decoder_tf.id)
# for normalizing input chanel need to transpose input data from [T, N, C] to [N, T, C]
# which supported CTCGreedyDecoderSeqLen op.
ctc_data_permute = create_op_with_const_inputs(graph, Transpose, {1: int64_array([1, 0, 2])},
{'name': ctc_greedy_decoder_tf_name + '/ctc_data_permute'})
assert ctc_greedy_decoder_tf.has_valid('merge_repeated'), \
'The CTCGreedyDecoderSeqLen node "{}" misses "merge_repeated" attribute'.format(ctc_greedy_decoder_tf_name)
ctc_greedy_decoder_tf.in_port(0).get_source().connect(ctc_data_permute.in_port(0))
merge_repeated_tf = ctc_greedy_decoder_tf.merge_repeated
ctc_greedy_decoder = CTCGreedyDecoderSeqLenOp(graph, {'name': sparse_to_dense_name,
'merge_repeated': merge_repeated_tf}).create_node()
rename_nodes(
[(sparse_to_dense, sparse_to_dense_name + '/AbandonedName'), (ctc_greedy_decoder, sparse_to_dense_name)])
ctc_greedy_decoder.in_port(0).connect(ctc_data_permute.out_port(0))
ctc_greedy_decoder_tf.in_port(1).get_source().connect(ctc_greedy_decoder.in_port(1))
# set output of the new sub-graph as a source for SparseToDense consumer
sparse_to_dense.out_port(0).get_connection().set_source(ctc_greedy_decoder.out_port(0))
# remove no longer needed nodes
graph.remove_nodes_from([sparse_to_dense.id, cast.id, ctc_greedy_decoder_tf.id])
def replace_sub_graph(self, graph: Graph, match: dict):
transpose_tf = match['transpose']
ctc_greedy_decoder_tf = match['ctc_greedy_decoder']
cast_tf = match['cast']
ctc_loss_tf = match['ctc_loss']
sparse_to_dense_tf = match['sparse_to_dense']
output_sparse_to_dense_name = sparse_to_dense_tf.soft_get('name', sparse_to_dense_tf.id)
ctc_data_permute = create_op_with_const_inputs(graph, Transpose, {1: int64_array([1, 0, 2])},
{'name': ctc_greedy_decoder_tf.name + '/ctc_data_permute'})
ctc_data_permute.in_port(0).connect(transpose_tf.out_port(0))
ctc_greedy_decoder_tf_name = ctc_greedy_decoder_tf.soft_get('name', ctc_greedy_decoder_tf.id)
assert ctc_greedy_decoder_tf.has_valid('merge_repeated'), \
'The CTCGreedyDecoderSeqLen node "{}" misses "merge_repeated" attribute'.format(ctc_greedy_decoder_tf_name)
merge_repeated_tf = ctc_greedy_decoder_tf.merge_repeated
ctc_greedy_decoder = CTCGreedyDecoderSeqLenOp(graph, {'name': output_sparse_to_dense_name,
'merge_repeated': merge_repeated_tf}).create_node()
rename_nodes([(sparse_to_dense_tf, output_sparse_to_dense_name + '/AbandonedName'),
(ctc_greedy_decoder, output_sparse_to_dense_name)])
ctc_greedy_decoder.in_port(0).connect(ctc_data_permute.out_port(0))
ctc_greedy_decoder.in_port(1).connect(ctc_greedy_decoder_tf.in_port(1).get_connection().get_source())
# set output of the new sub-graph as a source for SparseToDense consumer
output_ctc_loss_name = ctc_loss_tf.soft_get('name', ctc_loss_tf.id)
assert ctc_loss_tf.has_valid('preprocess_collapse_repeated'), \
'The CTCLoss node "{}" misses "preprocess_collapse_repeated" attribute'.format(output_ctc_loss_name)
assert ctc_loss_tf.has_valid('ctc_merge_repeated'), \
'The CTCLoss node "{}" misses "ctc_merge_repeated" attribute'.format(output_ctc_loss_name)
assert ctc_loss_tf.has_valid('unique'), \
'The CTCLoss node "{}" misses "unique" attribute'.format(output_ctc_loss_name)
preprocess_collapse_repeated = ctc_loss_tf.preprocess_collapse_repeated
ctc_merge_repeated = ctc_loss_tf.ctc_merge_repeated
unique = ctc_loss_tf.unique
ctc_loss = CTCLoss(graph, {'name': output_ctc_loss_name,
'preprocess_collapse_repeated': preprocess_collapse_repeated,
'ctc_merge_repeated': ctc_merge_repeated,
'unique': unique}).create_node()
rename_nodes([(ctc_loss_tf, output_ctc_loss_name + '/AbandonedName'), (ctc_loss, output_ctc_loss_name)])
ctc_loss_tf.out_port(0).get_connection().set_source(ctc_loss.out_port(0))
if ctc_loss_tf.logits_time_major:
ctc_loss.in_port(0).connect(ctc_data_permute.out_port(0))
else:
ctc_loss.in_port(0).connect(transpose_tf.out_port(0))
ctc_loss.in_port(1).connect(ctc_greedy_decoder_tf.in_port(1).get_connection().get_source())
ctc_loss.in_port(2).connect(ctc_greedy_decoder.out_port(0))
ctc_loss.in_port(3).connect(ctc_greedy_decoder.out_port(1))
# remove no longer needed nodes
graph.remove_nodes_from([sparse_to_dense_tf.id, cast_tf.id, ctc_loss_tf.id, ctc_greedy_decoder_tf.id])