public override (NDArrayOrSymbol[], NDArrayOrSymbol[]) Unroll(int length, NDArrayOrSymbol[] inputs,
NDArrayOrSymbol[] begin_state = null, string layout = "NTC", bool?merge_outputs = null,
Symbol valid_length = null)
{
Reset();
var(inputs1, _, batch_size) = RNNCell.FormatSequence(length, inputs, layout, false);
inputs = inputs1;
var num_cells = _childrens.Count;
begin_state = RNNCell.GetBeginState(this, begin_state, inputs, batch_size);
var p = 0;
NDArrayOrSymbol[] states = null;
var next_states = new List <NDArrayOrSymbol>();
foreach (var item in _childrens)
{
var i = Convert.ToInt32(item.Key);
var cell = item.Value;
var n = cell.StateInfo().Length;
p += n;
(inputs, states) = cell.Unroll(length, inputs, states, layout, i < num_cells - 1 ? null : merge_outputs,
valid_length);
next_states.AddRange(states);
}
return(inputs, next_states.ToArray());
}
public override (NDArrayOrSymbol[], NDArrayOrSymbol[]) Unroll(int length, NDArrayOrSymbol[] inputs,
NDArrayOrSymbol[] begin_state = null, string layout = "NTC", bool?merge_outputs = null,
Symbol valid_length = null)
{
Reset();
var axis = 0;
var batch_size = 0;
(inputs, axis, batch_size) = RNNCell.FormatSequence(length, inputs, layout, false);
var reversed_inputs = RNNCell._reverse_sequences(inputs, length, valid_length);
begin_state = RNNCell.GetBeginState(this, begin_state, inputs, batch_size);
var states = begin_state.ToList();
var l_cell = _childrens["l_cell"];
var r_cell = _childrens["r_cell"];
var(l_outputs, l_states) = l_cell.Unroll(length, inputs, states.Take(l_cell.StateInfo().Length).ToArray(),
layout, merge_outputs, valid_length);
var(r_outputs, r_states) = r_cell.Unroll(length, inputs, states.Skip(l_cell.StateInfo().Length).ToArray(),
layout, merge_outputs, valid_length);
var reversed_r_outputs = RNNCell._reverse_sequences(r_outputs, length, valid_length);
if (!merge_outputs.HasValue)
{
merge_outputs = l_outputs.Length > 1;
(l_outputs, _, _) = RNNCell.FormatSequence(null, l_outputs, layout, merge_outputs.Value);
(reversed_r_outputs, _, _) =
RNNCell.FormatSequence(null, reversed_r_outputs, layout, merge_outputs.Value);
}
NDArrayOrSymbol[] outputs = null;
if (merge_outputs.Value)
{
if (reversed_r_outputs[0].IsNDArray)
{
reversed_r_outputs = new NDArrayOrSymbol[]
{ nd.Stack(reversed_r_outputs.ToList().ToNDArrays(), reversed_r_outputs.Length, axis) }
}
;
else
{
reversed_r_outputs = new NDArrayOrSymbol[]
{ sym.Stack(reversed_r_outputs.ToList().ToSymbols(), reversed_r_outputs.Length, axis) }
};
var concatList = l_outputs.ToList();
concatList.AddRange(reversed_r_outputs);
if (reversed_r_outputs[0].IsNDArray)
{
outputs = new NDArrayOrSymbol[] { nd.Concat(concatList.ToList().ToNDArrays(), 2) }
}
;
else
{
outputs = new NDArrayOrSymbol[] { sym.Concat(concatList.ToList().ToSymbols(), 2) }
};
}
else
{
var outputs_temp = new List <NDArrayOrSymbol>();
for (var i = 0; i < l_outputs.Length; i++)
{
var l_o = l_outputs[i];
var r_o = reversed_r_outputs[i];
if (l_o.IsNDArray)
{
outputs_temp.Add(nd.Concat(new NDArray[] { l_o, r_o }));
}
else
{
outputs_temp.Add(sym.Concat(new Symbol[] { l_o, r_o }, 1, symbol_name: $"{_output_prefix}t{i}"));
}
}
outputs = outputs_temp.ToArray();
outputs_temp.Clear();
}
if (valid_length != null)
{
outputs = RNNCell.MaskSequenceVariableLength(outputs, length, valid_length, axis, merge_outputs.Value);
}
states.Clear();
states.AddRange(l_states);
states.AddRange(r_states);
return(outputs, states.ToArray());
}
public override NDArrayOrSymbol[] BeginState(int batch_size = 0, string func = null, FuncArgs args = null)
{
return(RNNCell.CellsBeginState(_childrens.Values.ToArray(), batch_size, func));
}
public override StateInfo[] StateInfo(int batch_size = 0)
{
return(RNNCell.CellsStateInfo(_childrens.Values.ToArray(), batch_size));
}