def testRevNetLayerFProp(self):
with self.session() as sess:
tf.set_random_seed(321)
input_1 = tf.random_normal([5, 3], seed=89122)
input_2 = tf.random_normal([5, 3], seed=19438)
p = reversible_layers.RevNetLayer.Params()
p.name = 'revnet_simple'
p.f_params = layers.FCLayer.Params().Set(input_dim=3, output_dim=3)
p.g_params = layers.FCLayer.Params().Set(input_dim=3, output_dim=3)
revnet_layer = p.Instantiate()
h, _, _ = revnet_layer.FPropDefaultTheta(
py_utils.NestedMap(split1=input_1, split2=input_2))
tf.global_variables_initializer().run()
actual_layer_output = sess.run(h)
expected_split1 = np.array([[-0.7262997, 0.9276514, -0.20907314],
[-0.7089523, 0.24923629, 2.5001974],
[1.6766014, 0.26847264, -0.2510258],
[0.9629222, -0.57908165, 0.0485389],
[2.7580009, 0.17540382, 1.6282884]],
dtype=np.float32)
expected_split2 = np.array([[1.1282716, 1.4266306, -0.16530532],
[-0.3836313, 0.04922554, 0.25543338],
[0.03718817, 1.5488712, 2.1594636],
[-2.1252284, 3.2059612, 0.1118355],
[3.4058936, -0.63690275, -0.95291173]],
dtype=np.float32)
self.assertAllClose(expected_split1, actual_layer_output.split1)
self.assertAllClose(expected_split2, actual_layer_output.split2)
def testSoftCondLayer(self):
num_experts = 100
with self.session(use_gpu=False, graph=tf.Graph()) as sess:
tf.set_random_seed(24332)
p = layers.SoftCondLayer.Params().Set(
name='soft_cond',
cond_dim=2,
num_experts=num_experts,
body=lingvo_layers.FCLayer.Params().Set(input_dim=2,
output_dim=2))
l = p.Instantiate()
x = tf.random_normal(shape=[1, 2, 2])
y = l.FPropDefaultTheta(x)
tf.global_variables_initializer().run()
x_val, y_val, vars_val = sess.run([x, y, l.vars])
p_nz = layers.SoftCondLayer.Params().Set(
name='soft_cond_nonzeros',
cond_dim=2,
num_experts=num_experts,
nonzeros_mean=True,
body=lingvo_layers.FCLayer.Params().Set(input_dim=2,
output_dim=2))
l_nz = p_nz.Instantiate()
x_nz = tf.random_normal(shape=[1, 2, 2])
y_nz = l_nz.FPropDefaultTheta(x_nz)
tf.global_variables_initializer().run()
x_nz_val, y_nz_val, vars_nz_val = sess.run([x_nz, y_nz, l_nz.vars])
np_val = x_val[0]
np_nz_val = x_nz_val[0]
taks_weight = np.exp(-1.0 * np.dot(np.mean(np_val, 0), vars_val.w))
taks_weight = 1.0 / (1.0 + taks_weight)
nzs = np.count_nonzero(np_nz_val, 0).astype('float32') + 1e-10
taks_weight_nz = np.exp(
-1.0 * np.dot(np.sum(np_nz_val, 0) / nzs, vars_nz_val.w))
taks_weight_nz = 1.0 / (1.0 + taks_weight_nz)
weighted_weight = np.einsum('i,ijk->jk', taks_weight, vars_val.body.w)
weighted_weight_nz = np.einsum('i,ijk->jk', taks_weight_nz,
vars_nz_val.body.w)
weighted_bias = np.einsum('i,ij->j', taks_weight, vars_val.body.b)
weighted_bias_nz = np.einsum('i,ij->j', taks_weight_nz,
vars_nz_val.body.b)
np_val_out = np.maximum(
0,
np.dot(np_val, weighted_weight) + weighted_bias)
np_val_out_nz = np.maximum(
0,
np.dot(np_nz_val, weighted_weight_nz) + weighted_bias_nz)
self.assertAllClose(np_val_out, y_val[0])
self.assertAllClose(np_val_out_nz, y_nz_val[0])
def _ForwardPass(self, p):
tf.set_random_seed(8372749040)
stt_enc = encoder.AsrEncoder(p)
batch = py_utils.NestedMap()
batch.src_inputs = tf.random_normal([2, 20, 16, 3], seed=92837472)
batch.paddings = tf.zeros([2, 20])
return stt_enc.FPropDefaultTheta(batch)
def _testDecoderFPropFloatHelper(self,
func_inline=False,
num_decoder_layers=1,
target_seq_len=5,
residual_start=0):
"""Computes decoder from params and computes loss with random inputs."""
cluster = cluster_factory.ForTestingWorker(add_summary=True)
config = tf.ConfigProto(graph_options=tf.GraphOptions(
optimizer_options=tf.OptimizerOptions(
do_function_inlining=func_inline)))
with cluster, self.session(use_gpu=False, config=config) as sess:
tf.set_random_seed(8372749040)
vn_config = py_utils.VariationalNoiseParams(None, False, False)
p = self._DecoderParams(vn_config)
p.rnn_layers = num_decoder_layers
p.residual_start = residual_start
p.target_seq_len = target_seq_len
dec = p.Instantiate()
src_seq_len = 5
src_enc = tf.random_normal([src_seq_len, 2, 8], seed=9283748)
src_enc_padding = tf.constant(
[[0.0, 0.0], [0.0, 0.0], [0.0, 0.0], [0.0, 1.0], [1.0, 1.0]],
dtype=tf.float32)
encoder_outputs = py_utils.NestedMap(encoded=src_enc,
padding=src_enc_padding)
target_ids = tf.transpose(
tf.constant([[0, 1, 2, 3], [1, 2, 3, 4], [10, 11, 12, 15],
[5, 6, 7, 8], [10, 5, 2, 5]],
dtype=tf.int32))
target_labels = tf.transpose(
tf.constant([[0, 1, 2, 3], [1, 2, 3, 4], [10, 11, 12, 13],
[5, 7, 8, 10], [10, 5, 2, 4]],
dtype=tf.int32))
target_paddings = tf.transpose(
tf.constant([[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 1, 0],
[0, 1, 0, 0], [1, 1, 1, 1]],
dtype=tf.float32))
target_transcripts = tf.constant(
['abcd', 'bcde', 'klmp', 'fghi', 'kfcf'])
target_weights = 1.0 - target_paddings
targets = py_utils.NestedMap({
'ids': target_ids,
'labels': target_labels,
'weights': target_weights,
'paddings': target_paddings,
'transcripts': target_transcripts,
})
metrics = dec.FPropDefaultTheta(encoder_outputs, targets).metrics
loss = metrics['loss'][0]
correct_predicts = metrics['fraction_of_correct_next_step_preds'][
0]
summaries = tf.summary.merge(
tf.get_collection(tf.GraphKeys.SUMMARIES))
tf.global_variables_initializer().run()
loss_v, _ = sess.run([loss, correct_predicts])
summaries.eval()
return loss_v
def testUnarySequentialLayer(self):
g = tf.Graph()
with g.as_default():
tf.set_random_seed(24332)
p = layers.UnarySequentialLayer.Params().Set(
name='seq',
sub=[
lingvo_layers.FCLayer.Params().Set(name='foo',
input_dim=32,
output_dim=8),
lingvo_layers.FCLayer.Params().Set(name='bar',
input_dim=8,
output_dim=8),
lingvo_layers.FCLayer.Params().Set(name='baz',
input_dim=8,
output_dim=32),
lingvo_layers.DropoutLayer.Params().Set(name='dropout',
keep_prob=0.5)
])
p.is_eval = True
l = p.Instantiate()
x = tf.random_normal(shape=[2, 32])
y = l.FPropDefaultTheta(x)
l.vars.Transform(lambda x: x.shape).VLog(0, 'vars: ')
with self.session(graph=g) as sess:
sess.run(tf.global_variables_initializer())
x_val, y_val, w = sess.run([x, y, l.vars])
act = x_val
# relu(act \dot w + b)
act = np.maximum(0, np.dot(act, w.foo.w) + w.foo.b)
act = np.maximum(0, np.dot(act, w.bar.w) + w.bar.b)
act = np.maximum(0, np.dot(act, w.baz.w) + w.baz.b)
self.assertAllClose(act, y_val)
def _Sources(self):
p = self.params
if p.cur_iter_in_seed:
self._cur_iter += 1
if p.integer_source_max:
inputs = tf.random_uniform(p.source_shape,
maxval=p.integer_source_max,
dtype=tf.int32,
seed=p.random_seed +
1000 * self._cur_iter)
elif p.float_source_max:
inputs = tf.random_uniform(p.source_shape,
maxval=p.float_source_max,
seed=p.random_seed +
1000 * self._cur_iter)
else:
inputs = tf.random_normal(p.source_shape,
seed=p.random_seed +
1000 * self._cur_iter)
paddings = tf.cast(
tf.cumsum(
tf.random_uniform(p.source_shape[:2],
seed=p.random_seed + 1001 * self._cur_iter),
axis=1) > 0.5 * p.source_shape[1], tf.float32)
paddings = self._check_paddings(paddings)
return inputs, paddings
def testParallelRepeatLayerLayer(self):
repeat = 100
body_p = layers.SequentialLayer.Params().Set(
name='body',
sub=[
layers.LinearLayer.Params().Set(
name='ln1', input_dims=2, output_dims=4),
layers.FnLayer.Params().Set(
name='relu',
fn=tf.nn.relu,
fn_meta=lambda x: py_utils.NestedMap(flops=1, out_shapes=(x,))),
layers.LinearLayer.Params().Set(
name='ln2', input_dims=4, output_dims=2)
])
with self.session(use_gpu=False, graph=tf.Graph()) as sess:
tf.set_random_seed(24332)
p = layers.ParallelRepeatLayer.Params().Set(
name='moe', repeat=repeat, body=body_p)
l = p.Instantiate()
x = tf.random_normal(shape=[repeat, 2, 2])
y = l.FPropDefaultTheta(x)
tf.global_variables_initializer().run()
x_val, y_val, w = sess.run([x, y, l.vars])
np_val = []
for i in range(repeat):
# relu(act \dot w_1) \dot w_2
np_val.append(
np.dot(
np.maximum(0, np.dot(x_val[i], w.body.ln1.w[i])),
w.body.ln2.w[i]))
np_val = np.stack(np_val)
self.assertAllClose(np_val, y_val)
def GetBeamSearchHelperResults(sess, num_hyps_per_beam):
np.random.seed(9384758)
tf.set_random_seed(8274758)
vocab_size = 12
src_len = 5
tgt_len = 7
src_batch_size = 2
tgt_batch_size = src_batch_size * num_hyps_per_beam
p = beam_search_helper.BeamSearchHelper.Params().Set(
name='bsh', target_seq_len=tgt_len)
bs_helper = p.Instantiate()
def InitBeamSearchState(unused_theta, unused_encoder_outputs,
unused_num_hyps_per_beam):
atten_probs = tf.constant(np.random.normal(size=(tgt_batch_size,
src_len)),
dtype=tf.float32)
return (py_utils.NestedMap({
'log_probs':
tf.zeros([tgt_batch_size, vocab_size]),
'atten_probs':
atten_probs,
}), py_utils.NestedMap({'atten_probs': atten_probs}))
def PreBeamSearchStepCallback(unused_theta, unused_encoder_outputs,
unused_step_ids, states,
unused_num_hyps_per_beam):
atten_probs = tf.identity(states.atten_probs)
logits = tf.random_normal([tgt_batch_size, vocab_size], seed=8273747)
return (py_utils.NestedMap({
'atten_probs': atten_probs,
'log_probs': logits
}), states)
def PostBeamSearchStepCallback(unused_theta, unused_encoder_outputs,
unused_new_step_ids, states):
return states
src_enc = tf.random_normal([src_len, src_batch_size, 8], seed=982774838)
src_enc_padding = tf.constant(
[[0.0, 0.0], [0.0, 0.0], [0.0, 0.0], [0.0, 1.0], [1.0, 1.0]],
dtype=tf.float32)
encoder_outputs = py_utils.NestedMap(encoded=src_enc,
padding=src_enc_padding)
theta = py_utils.NestedMap()
decoder_output = bs_helper.BeamSearchDecode(theta, encoder_outputs,
num_hyps_per_beam,
InitBeamSearchState,
PreBeamSearchStepCallback,
PostBeamSearchStepCallback)
topk_ids, topk_lens, topk_scores = sess.run([
decoder_output.topk_ids, decoder_output.topk_lens,
decoder_output.topk_scores
])
return topk_ids, topk_lens, topk_scores
def PreBeamSearchStepCallback(unused_theta, unused_encoder_outputs,
unused_step_ids, states,
unused_num_hyps_per_beam):
atten_probs = tf.identity(states.atten_probs)
logits = tf.random_normal([tgt_batch_size, vocab_size], seed=8273747)
return (py_utils.NestedMap({
'atten_probs': atten_probs,
'log_probs': logits
}), states)
def testDecoderWithOrientedPerClassNMS(self):
batch_size = 4
num_preds = 8
num_classes = 10
# An example of setting the score threshold high and IOU threshold low
# for classes we don't care about
score_threshold = [1.0] * num_classes
score_threshold[1] = 0.05
nms_iou_threshold = [0.0] * num_classes
nms_iou_threshold[1] = 0.5
with tf.Graph().as_default():
tf.set_random_seed(12345)
predicted_bboxes = tf.random_normal([batch_size, num_preds, 7])
classification_scores = tf.random_uniform(
[batch_size, num_preds, num_classes], minval=0, maxval=1)
bboxes, bbox_scores, valid_mask = detection_decoder.DecodeWithNMS(
predicted_bboxes,
classification_scores,
nms_iou_threshold=nms_iou_threshold,
score_threshold=score_threshold,
use_oriented_per_class_nms=True)
with self.session() as sess:
outputs = sess.run([
predicted_bboxes, classification_scores, bboxes,
bbox_scores, valid_mask
])
(input_bboxes, input_scores, output_bboxes, output_scores,
mask) = outputs
self.assertEqual((batch_size, num_preds, 7),
input_bboxes.shape)
self.assertEqual((batch_size, num_classes, num_preds, 7),
output_bboxes.shape)
self.assertEqual((batch_size, num_preds, num_classes),
input_scores.shape)
self.assertEqual((batch_size, num_classes, num_preds),
output_scores.shape)
self.assertEqual((batch_size, num_classes, num_preds),
mask.shape)
# Assert that NMS did some kind of filtering for each class
for cls_idx in range(num_classes):
self.assertEqual(mask[:, cls_idx, :].sum(),
(input_scores[:, :, cls_idx] >
score_threshold[cls_idx]).sum())
self.assertEqual(mask[:, cls_idx, :].sum(),
(output_scores[:, cls_idx, :] >
score_threshold[cls_idx]).sum())
def testCreateMask2D(self):
width = 10
height = 20
with self.cached_session():
weights = tf.Variable(tf.random_normal([width, height], stddev=1),
name="weights")
masked_weights = pruning.apply_mask(weights,
tf.get_variable_scope())
tf.global_variables_initializer().run()
weights_val = weights.eval()
masked_weights_val = masked_weights.eval()
self.assertAllEqual(weights_val, masked_weights_val)
def testEmptySequentialLayerFPropMeta(self):
g = tf.Graph()
with g.as_default():
p = layers.SequentialLayer.Params().Set(name='seq')
l = p.Instantiate()
x = py_utils.NestedMap(val=tf.random_normal(shape=[2, 32]))
y = l.FPropDefaultTheta(x)
self.assertIsInstance(y.val, tf.Tensor)
y_shape = l.FPropMeta(
p, py_utils.Transform(lambda t: tshape.Shape(t.shape),
x)).out_shapes[0]
self.assertEqual(y.val.shape.as_list(),
y_shape.val.ToTensorShape().as_list())
def testEmptySequentialLayer(self):
g = tf.Graph()
with g.as_default():
tf.set_random_seed(24332)
p = layers.SequentialLayer.Params().Set(name='seq')
l = p.Instantiate()
x = tf.random_normal(shape=[2, 32])
y = l.FPropDefaultTheta(x)
self.assertIsInstance(y, tf.Tensor)
with self.session(graph=g) as sess:
sess.run(tf.global_variables_initializer())
x_val, y_val = sess.run([x, y])
self.assertAllEqual(x_val, y_val)
def testParallelMatmulLayer(self):
g = tf.Graph()
with g.as_default():
tf.set_random_seed(24332)
def MergeFn(xs):
result = []
for x in zip(*xs):
val = x[0]
for v in x[1:]:
val = tf.matmul(val, v)
result.append(val)
return tuple(result)
p = layers.ParallelLayer.Params().Set(
name='parallel',
merge=MergeFn,
sub=[
lingvo_layers.FCLayer.Params().Set(name='foo',
input_dim=32,
output_dim=4),
lingvo_layers.FCLayer.Params().Set(name='bar',
input_dim=32,
output_dim=4),
lingvo_layers.FCLayer.Params().Set(name='baz',
input_dim=32,
output_dim=4)
])
l = p.Instantiate()
x = tf.random_normal(shape=[2, 4, 32])
y = l.FPropDefaultTheta(x)
with self.session(graph=g) as sess:
sess.run(tf.global_variables_initializer())
x_val, y_val, w = sess.run([x, y, l.vars])
out = []
act = x_val
# relu(act \dot w + b)
out += [np.maximum(0, np.matmul(act, w.foo.w) + w.foo.b)]
self.assertEqual(out[-1].shape, (2, 4, 4))
out += [np.maximum(0, np.matmul(act, w.bar.w) + w.bar.b)]
self.assertEqual(out[-1].shape, (2, 4, 4))
out += [np.maximum(0, np.matmul(act, w.baz.w) + w.baz.b)]
self.assertEqual(out[-1].shape, (2, 4, 4))
np_result = out[0]
for v in out[1:]:
np_result = np.matmul(np_result, v)
self.assertAllClose(np_result, y_val, atol=1e-5, rtol=1e-5)
def testBiasLayer(self):
g = tf.Graph()
with g.as_default():
tf.set_random_seed(24332)
p = layers.BiasLayer.Params().Set(name='test', dims=10)
l = p.Instantiate()
x = tf.random_normal(shape=[2, 10])
y = l.FPropDefaultTheta(x)
with self.session(graph=g) as sess:
sess.run(tf.global_variables_initializer())
x_val, y_val, w_val = sess.run([x, y, l.vars])
self.assertEqual(w_val.b.shape, (10, ))
self.assertAllClose(x_val + w_val.b, y_val)
def testMapLayer(self):
g = tf.Graph()
with g.as_default():
tf.set_random_seed(24332)
p = layers.MapLayer.Params().Set(
name='map', fn=tf.reduce_max, kwargs={'axis': 1})
l = p.Instantiate()
x0, x1 = [tf.random_normal(shape=[2, 3, 5])] * 2
y0, y1 = l.FPropDefaultTheta(x0, x1)
with self.session(graph=g) as sess:
sess.run(tf.global_variables_initializer())
vx0, vx1, vy0, vy1 = sess.run([x0, x1, y0, y1])
self.assertAllClose(np.max(vx0, 1), vy0)
self.assertAllClose(np.max(vx1, 1), vy1)
def testParallelLayer(self):
g = tf.Graph()
with g.as_default():
tf.set_random_seed(24332)
p = layers.ParallelLayer.Params().Set(
name='test',
merge=lambda xs: tuple([tf.add_n(x) for x in zip(*xs)]),
sub=[
lingvo_layers.FCLayer.Params().Set(name='foo',
input_dim=32,
output_dim=4),
lingvo_layers.FCLayer.Params().Set(name='bar',
input_dim=32,
output_dim=4),
layers.SequentialLayer.Params().Set(
name='seq',
sub=[
lingvo_layers.FCLayer.Params().Set(name='baz',
input_dim=32,
output_dim=4),
lingvo_layers.DropoutLayer.Params().Set(
name='dropout', keep_prob=0.5)
])
])
p.is_eval = True
l = p.Instantiate()
x = tf.random_normal(shape=[2, 32])
y = l.FPropDefaultTheta(x)
with self.session(graph=g) as sess:
sess.run(tf.global_variables_initializer())
x_val, y_val, w = sess.run([x, y, l.vars])
out = []
act = x_val
# relu(act \dot w + b)
out += [np.maximum(0, np.matmul(act, w.foo.w) + w.foo.b)]
self.assertEqual(out[-1].shape, (2, 4))
out += [np.maximum(0, np.matmul(act, w.bar.w) + w.bar.b)]
self.assertEqual(out[-1].shape, (2, 4))
out += [np.maximum(0, np.matmul(act, w.seq.baz.w) + w.seq.baz.b)]
self.assertEqual(out[-1].shape, (2, 4))
np_result = out[0]
for v in out[1:]:
np_result = np.add(np_result, v)
self.assertAllClose(np_result, y_val)
def _testDecoderFPropHelper(self, params):
"""Computes decoder from params and computes loss with random inputs."""
dec = decoder.AsrDecoder(params)
src_seq_len = 5
src_enc = tf.random_normal([src_seq_len, 2, 8],
seed=982774838,
dtype=py_utils.FPropDtype(params))
src_enc_padding = tf.constant(
[[0.0, 0.0], [0.0, 0.0], [0.0, 0.0], [0.0, 1.0], [1.0, 1.0]],
dtype=py_utils.FPropDtype(params))
encoder_outputs = py_utils.NestedMap(encoded=src_enc,
padding=src_enc_padding)
# shape=[4, 5]
target_ids = tf.transpose(
tf.constant([[0, 1, 2, 3], [1, 2, 3, 4], [10, 11, 12, 15],
[5, 6, 7, 8], [10, 5, 2, 5]],
dtype=tf.int32))
# shape=[4, 5]
target_labels = tf.transpose(
tf.constant([[0, 1, 2, 3], [1, 2, 3, 4], [10, 11, 12, 13],
[5, 7, 8, 10], [10, 5, 2, 4]],
dtype=tf.int32))
# shape=[4, 5]
target_paddings = tf.transpose(
tf.constant([[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 1, 0],
[0, 1, 0, 0], [1, 1, 1, 0]],
dtype=py_utils.FPropDtype(params)))
target_transcripts = tf.constant(
['abcd', 'bcde', 'klmp', 'fghi', 'kfcf'])
target_weights = 1.0 - target_paddings
# ids/labels/weights/paddings are all in [batch, time] shape.
targets = py_utils.NestedMap({
'ids': target_ids,
'labels': target_labels,
'weights': target_weights,
'paddings': target_paddings,
'transcripts': target_transcripts,
})
metrics, per_sequence_loss = dec.FPropWithPerExampleLoss(
encoder_outputs, targets)
loss = metrics['loss']
return loss, per_sequence_loss
def testRepeatLayer(self):
repeat = 100
with self.session(use_gpu=False, graph=tf.Graph()) as sess:
tf.set_random_seed(24332)
p = layers.RepeatLayer.Params().Set(
name='recurrent',
repeat=repeat,
body=lingvo_layers.FCLayer.Params().Set(input_dim=2, output_dim=2))
l = p.Instantiate()
x = tf.random_normal(shape=[2, 2])
y = l.FPropDefaultTheta(x)
tf.global_variables_initializer().run()
x_val, y_val, w = sess.run([x, y, l.vars])
np_val = x_val
# relu(act \dot w + b)
for i in range(repeat):
np_val = np.maximum(0, np.dot(np_val, w.body.w[i]) + w.body.b[i])
self.assertAllClose(np_val, y_val)
def testSoftCondLayer(self):
num_experts = 100
with self.session(use_gpu=False, graph=tf.Graph()) as sess:
tf.set_random_seed(24332)
p = layers.SoftCondLayer.Params().Set(
name='soft_cond',
cond_dim=2,
num_experts=num_experts,
body=lingvo_layers.FCLayer.Params().Set(input_dim=2, output_dim=2))
l = p.Instantiate()
x = tf.random_normal(shape=[1, 2, 2])
y = l.FPropDefaultTheta(x)
tf.global_variables_initializer().run()
x_val, y_val, vars_val = sess.run([x, y, l.vars])
np_val = x_val[0]
taks_weight = np.exp(-1.0 * np.dot(np.sum(np_val, 0), vars_val.w))
taks_weight = 1.0 / (1.0 + taks_weight)
weighted_weight = np.einsum('i,ijk->jk', taks_weight, vars_val.body.w)
weighted_bias = np.einsum('i,ij->j', taks_weight, vars_val.body.b)
np_val = np.maximum(0, np.dot(np_val, weighted_weight) + weighted_bias)
self.assertAllClose(np_val, y_val[0])
def _FPropChunk(self, theta, pcm_audio_chunk, pcm_audio_paddings):
p = self.params
pcm_audio_chunk = tf.cast(pcm_audio_chunk, tf.float32)
# shape: [batch, time, _frame_size]
framed_signal = tf.signal.frame(pcm_audio_chunk, self._frame_size,
self._frame_step, p.pad_end)
# Pre-emphasis.
if p.preemph != 1.0:
preemphasized = self._ApplyPreemphasis(framed_signal)
else:
preemphasized = framed_signal[:-1]
# Noise.
if p.noise_scale > 0.0:
noise_signal = tf.random_normal(
tf.shape(preemphasized),
stddev=p.noise_scale,
mean=0.0,
seed=p.random_seed)
else:
noise_signal = 0.0
# Apply window fn.
windowed_signal = preemphasized + noise_signal
if self._window_fn is not None:
window = self._window_fn(self._frame_size - 1, framed_signal.dtype)
windowed_signal *= window
mel_spectrogram = self._MelSpectrogram(windowed_signal)
output_floor = 1.0
mel_spectrogram_log = tf.log(
tf.maximum(float(output_floor), mel_spectrogram))
# Mean and stddev.
mel_spectrogram_norm = (
(mel_spectrogram_log - tf.convert_to_tensor(p.per_bin_mean)) /
tf.convert_to_tensor(p.per_bin_stddev))
return mel_spectrogram_norm, self._GetMelPadding(pcm_audio_paddings)
def testLinearLayer(self):
g = tf.Graph()
with g.as_default():
tf.set_random_seed(24332)
p = layers.LinearLayer.Params().Set(
name='test', input_dims=10, output_dims=5)
l = p.Instantiate()
xs = []
ys = []
for shape in ([2, 10], [2, 3, 10], [2, 3, 5, 10], [2, 3, 5, 7, 10]):
x = tf.random_normal(shape=shape)
y = l.FPropDefaultTheta(x)
xs += [x]
ys += [y]
with self.session(graph=g) as sess:
sess.run(tf.global_variables_initializer())
xs_val, ys_val, w_val = sess.run([xs, ys, l.vars])
self.assertEqual(w_val.w.shape, (10, 5))
for (xv, yv) in zip(xs_val, ys_val):
self.assertAllClose(np.matmul(xv, w_val.w), yv)
def testDecoderSingleClassNMS(self):
batch_size = 4
num_preds = 8
num_classes = 10
score_threshold = 0.05
nms_iou_threshold = 0.5
with tf.Graph().as_default():
tf.set_random_seed(12345)
predicted_bboxes = tf.random_normal([batch_size, num_preds, 7])
classification_scores = tf.random_uniform(
[batch_size, num_preds, num_classes], minval=0, maxval=1)
bboxes, bbox_scores, valid_mask = detection_decoder.DecodeWithNMS(
predicted_bboxes,
classification_scores,
nms_iou_threshold=nms_iou_threshold,
score_threshold=score_threshold,
use_oriented_per_class_nms=False)
with self.session() as sess:
outputs = sess.run([
predicted_bboxes, classification_scores, bboxes,
bbox_scores, valid_mask
])
(input_bboxes, input_scores, output_bboxes, output_scores,
mask) = outputs
self.assertEqual((batch_size, num_preds, 7),
input_bboxes.shape)
self.assertEqual((batch_size, num_classes, num_preds, 7),
output_bboxes.shape)
self.assertEqual((batch_size, num_preds, num_classes),
input_scores.shape)
self.assertEqual((batch_size, num_classes, num_preds),
output_scores.shape)
self.assertEqual((batch_size, num_classes, num_preds),
mask.shape)
def testGreedySearchHelper(self):
with self.session(use_gpu=False) as sess:
np.random.seed(9384758)
tf.set_random_seed(8274758)
vocab_size = 12
src_len = 5
tgt_len = 7
src_batch_size = 2
tgt_batch_size = src_batch_size
p = beam_search_helper.GreedySearchHelper.Params().Set(
name='gsh', target_seq_len=tgt_len)
gs_helper = p.Instantiate()
def InitGreedySearchState(unused_theta, unused_encoder_outputs,
unused_num_hyps_per_beam):
atten_probs = tf.constant(
np.random.normal(size=(tgt_batch_size, src_len)),
dtype=tf.float32)
return (py_utils.NestedMap({
'log_probs':
tf.zeros([tgt_batch_size, vocab_size]),
'atten_probs':
atten_probs,
}), py_utils.NestedMap({'atten_probs': atten_probs}))
def PreGreedySearchStepCallback(unused_theta,
unused_encoder_outputs,
unused_step_ids, states,
unused_num_hyps_per_beam):
atten_probs = tf.identity(states.atten_probs)
logits = tf.random_normal([tgt_batch_size, vocab_size],
seed=8273747)
return (py_utils.NestedMap({
'atten_probs': atten_probs,
'log_probs': logits
}), states)
def PostGreedySearchStepCallback(unused_theta,
unused_encoder_outputs,
unused_new_step_ids, states):
return states
src_enc = tf.random_normal([src_len, src_batch_size, 8],
seed=982774838)
src_enc_padding = tf.constant(
[[0.0, 0.0], [0.0, 0.0], [0.0, 0.0], [0.0, 1.0], [1.0, 1.0]],
dtype=tf.float32)
encoder_outputs = py_utils.NestedMap(encoded=src_enc,
padding=src_enc_padding)
theta = py_utils.NestedMap()
(final_hyp_ids, final_hyp_lens,
final_done_hyps) = gs_helper.GreedySearchDecode(
theta, encoder_outputs, InitGreedySearchState,
PreGreedySearchStepCallback, PostGreedySearchStepCallback)
(final_hyp_ids, final_hyp_lens, final_done_hyps) = sess.run(
[final_hyp_ids, final_hyp_lens, final_done_hyps])
print(np.array_repr(final_hyp_ids))
print(np.array_repr(final_hyp_lens))
print(np.array_repr(final_done_hyps))
expected_hyp_ids = [[2, 2, 6, 7, 1, 9, 4], [3, 9, 3, 9, 6, 5, 10]]
expected_hyp_lens = [1, 7]
expected_done_hyps = [True, False]
self.assertEqual(expected_hyp_ids, final_hyp_ids.tolist())
self.assertEqual(expected_hyp_lens, final_hyp_lens.tolist())
self.assertEqual(expected_done_hyps, final_done_hyps.tolist())
def testCustomStepIds(self):
with self.session(use_gpu=False) as sess:
np.random.seed(9384758)
tf.set_random_seed(8274758)
vocab_size = 12
src_len = 5
tgt_len = 7
num_hyps_per_beam = 3
src_batch_size = 2
tgt_batch_size = src_batch_size * num_hyps_per_beam
p = beam_search_helper.BeamSearchHelper.Params().Set(
name='bsh', target_seq_len=tgt_len)
bs_helper = p.Instantiate()
def InitBeamSearchState(unused_theta, unused_encoder_outputs,
unused_num_hyps_per_beam):
atten_probs = tf.constant(
np.random.normal(size=(tgt_batch_size, src_len)),
dtype=tf.float32)
return (py_utils.NestedMap({
'log_probs':
tf.zeros([tgt_batch_size, vocab_size]),
'atten_probs':
atten_probs,
'step_ids':
tf.zeros([tgt_batch_size, 1], dtype=tf.int32)
}), py_utils.NestedMap({'atten_probs': atten_probs}))
def PreBeamSearchStepCallback(unused_theta, unused_encoder_outputs,
unused_step_ids, states,
unused_num_hyps_per_beam):
atten_probs = tf.identity(states.atten_probs)
logits = tf.random_normal([tgt_batch_size, vocab_size],
seed=8273747)
return (py_utils.NestedMap({
'atten_probs': atten_probs,
'log_probs': logits
}), states)
def PostBeamSearchStepCallback(unused_theta,
unused_encoder_outputs,
unused_new_step_ids, states):
return states
src_enc = tf.random_normal([src_len, src_batch_size, 8],
seed=982774838)
src_enc_padding = tf.constant(
[[0.0, 0.0], [0.0, 0.0], [0.0, 0.0], [0.0, 1.0], [1.0, 1.0]],
dtype=tf.float32)
encoder_outputs = py_utils.NestedMap(encoded=src_enc,
padding=src_enc_padding)
theta = py_utils.NestedMap()
decoder_output = bs_helper.BeamSearchDecode(
theta, encoder_outputs, num_hyps_per_beam, InitBeamSearchState,
PreBeamSearchStepCallback, PostBeamSearchStepCallback)
topk_ids, topk_lens, topk_scores = sess.run([
decoder_output.topk_ids, decoder_output.topk_lens,
decoder_output.topk_scores
])
print(np.array_repr(topk_ids))
print(np.array_repr(topk_lens))
print(np.array_repr(topk_scores))
expected_topk_ids = [[4, 3, 4, 3, 2, 0, 0], [4, 3, 11, 2, 0, 0, 0],
[4, 3, 6, 2, 0, 0, 0], [6, 0, 4, 6, 6, 11, 2],
[6, 0, 4, 6, 1, 2, 0], [6, 0, 4, 6, 6, 2, 0]]
expected_topk_lens = [5, 4, 4, 7, 6, 6]
expected_topk_scores = [[8.27340603, 6.26949024, 5.59490776],
[9.74691486, 8.46679497, 7.14809656]]
self.assertEqual(expected_topk_ids, topk_ids.tolist())
self.assertEqual(expected_topk_lens, topk_lens.tolist())
self.assertAllClose(expected_topk_scores, topk_scores)
def testExpandTensor(self, input_shape, block_dim): weights = tf.random_normal(shape=input_shape) self._compare_expand_tensor_with_kronecker_product(weights, block_dim)
