def forward(self, x):
if x.dim() >= 3:
raise RuntimeError(
"{} accept 1/2D tensor as input, but got {:d}".format(
self.__name__, x.dim()
)
)
# when inference, only one utt
if x.dim() == 1:
x = flow.unsqueeze(x, 0)
# n x 1 x S => n x N x T
w = F.relu(self.encoder_1d(x))
# n x B x T
y = self.proj(self.ln(w))
# n x B x T
y = self.repeats(y)
# n x 2N x T
e = flow.chunk(self.mask(y), self.num_spks, 1)
# n x N x T
if self.non_linear_type == "softmax":
m = self.non_linear(flow.stack(e, dim=0), dim=0)
else:
m = self.non_linear(flow.stack(e, dim=0))
# spks x [n x N x T]
s = [w * m[n] for n in range(self.num_spks)]
# spks x n x S
return [self.decoder_1d(x, squeeze=True) for x in s]
def forward(self, hidden_states, layer_past=None, use_cache=False):
hidden_states = self.c_attn(hidden_states)
query, key, value = flow.chunk(hidden_states, chunks=3, dim=2)
query = self._split_heads(query, self.num_heads, self.head_dim)
key = self._split_heads(key, self.num_heads, self.head_dim)
value = self._split_heads(value, self.num_heads, self.head_dim)
if layer_past is not None:
past_key, past_value = layer_past
key = flow.cat((past_key, key), dim=-2)
value = flow.cat((past_value, value), dim=-2)
if use_cache is True:
present = (key, value)
else:
present = None
attn_output, attn_weights = self._attn(query, key, value)
attn_output = self._merge_heads(attn_output, self.num_heads,
self.head_dim)
attn_output = self.c_proj(attn_output)
attn_output = self.resid_dropout(attn_output)
outputs = (attn_output, present, attn_weights)
return outputs
def test_chunk_0_dim_input_exception(test_case):
# torch exception and messge:
#
# RuntimeError: chunk expects at least a 1-dimensional tensor.
#
x = flow.tensor(3.14)
with test_case.assertRaises(RuntimeError) as ctx:
y = flow.chunk(x, chunks=1, dim=0)
test_case.assertTrue("chunk expects at least a 1-dimensional tensor" in
str(ctx.exception))
def test_chunk_dim_param_exception(test_case):
# torch exception and messge:
#
# IndexError: Dimension out of range (expected to be in range of [-2, 1], but got -3)
#
x = flow.tensor([[1, 2, 3], [4, 5, 6]])
with test_case.assertRaises(IndexError) as ctx:
y = flow.chunk(x, chunks=2, dim=-3)
test_case.assertTrue(
"Dimension out of range (expected to be in range of [-2, 1], but got -3)"
in str(ctx.exception))
def test_chunk_0_chunks_param_exception(test_case):
# torch exception and messge:
#
# RuntimeError: chunk expects `chunks` to be greater than 0, got: 0
#
x = flow.tensor([[1, 2, 3], [4, 5, 6]])
with test_case.assertRaises(RuntimeError) as ctx:
y = flow.chunk(x, chunks=0, dim=0)
test_case.assertTrue(
"chunk expects `chunks` to be greater than 0, got: " in str(
ctx.exception))
def test_chunk_value_runtime_error(test_case):
with test_case.assertRaises(Exception) as context:
x = flow.ones((1, 2, 3), dtype=flow.float32, requires_grad=True)
y = flow.chunk(x, chunks=-1, dim=4)
test_case.assertTrue("chunk expects `chunks` to be greater than 0, got"
in str(context.exception))
def test_chunk_tensor_dim_runtime_error(test_case):
with test_case.assertRaises(Exception) as context:
x = flow.tensor(1, dtype=flow.float32, requires_grad=True)
y = flow.chunk(x, chunks=2, dim=4)
test_case.assertTrue("chunk expects at least a 1-dimensional tensor" in
str(context.exception))
def test_chunk_index_error(test_case):
with test_case.assertRaises(Exception) as context:
x = flow.ones((1, 2, 3), dtype=flow.float32, requires_grad=True)
y = flow.chunk(x, chunks=2, dim=4)
test_case.assertTrue(
"Dimension out of range" in str(context.exception))
