Merge branch 'master' of upstream.

examples/fastspeech/config/synthesis.yaml → examples/fastspeech/configs/synthesis.yaml

@@ -3,8 +3,8 @@ audio:
   n_fft: 2048
   sr: 22050
   preemphasis: 0.97
-  hop_length: 275
-  win_length: 1102
+  hop_length: 256
+  win_length: 1024
   power: 1.2
   min_level_db: -100
   ref_level_db: 20

examples/fastspeech/parse.py

@@ -52,6 +52,12 @@ def add_config_options_to_parser(parser):
         type=int,
         default=0,
         help="use data parallel or not during training.")
+    parser.add_argument(
+        '--alpha',
+        type=float,
+        default=1.0,
+        help="The hyperparameter to determine the length of the expanded sequence \
+                mel, thereby controlling the voice speed.")
 
     parser.add_argument(
         '--data_path',

examples/fastspeech/synthesis.py

@@ -24,6 +24,7 @@ import paddle.fluid.dygraph as dg
 from parakeet.g2p.en import text_to_sequence
 from parakeet import audio
 from parakeet.models.fastspeech.fastspeech import FastSpeech
+from parakeet.models.transformer_tts.utils import *
 
 
 def load_checkpoint(step, model_path):
@@ -59,12 +60,26 @@ def synthesis(text_input, args):
         model.eval()
 
         text = np.asarray(text_to_sequence(text_input))
-        text = fluid.layers.unsqueeze(dg.to_variable(text), [0])
+        text = np.expand_dims(text, axis=0)
         pos_text = np.arange(1, text.shape[1] + 1)
-        pos_text = fluid.layers.unsqueeze(dg.to_variable(pos_text), [0])
+        pos_text = np.expand_dims(pos_text, axis=0)
+        enc_non_pad_mask = get_non_pad_mask(pos_text).astype(np.float32)
+        enc_slf_attn_mask = get_attn_key_pad_mask(pos_text,
+                                                  text).astype(np.float32)
+
+        text = dg.to_variable(text)
+        pos_text = dg.to_variable(pos_text)
+        enc_non_pad_mask = dg.to_variable(enc_non_pad_mask)
+        enc_slf_attn_mask = dg.to_variable(enc_slf_attn_mask)
 
         mel_output, mel_output_postnet = model(
-            text, pos_text, alpha=args.alpha)
+            text,
+            pos_text,
+            alpha=args.alpha,
+            enc_non_pad_mask=enc_non_pad_mask,
+            enc_slf_attn_mask=enc_slf_attn_mask,
+            dec_non_pad_mask=None,
+            dec_slf_attn_mask=None)
 
         _ljspeech_processor = audio.AudioProcessor(
             sample_rate=cfg['audio']['sr'],

examples/fastspeech/train.py

@@ -21,6 +21,7 @@ from parse import add_config_options_to_parser
 from pprint import pprint
 from ruamel import yaml
 from tqdm import tqdm
+from matplotlib import cm
 from collections import OrderedDict
 from tensorboardX import SummaryWriter
 import paddle.fluid.dygraph as dg
@@ -66,12 +67,12 @@ def main(args):
 
     with dg.guard(place):
         with fluid.unique_name.guard():
-            transformerTTS = TransformerTTS(cfg)
+            transformer_tts = TransformerTTS(cfg)
             model_dict, _ = load_checkpoint(
                 str(args.transformer_step),
                 os.path.join(args.transtts_path, "transformer"))
-            transformerTTS.set_dict(model_dict)
-            transformerTTS.eval()
+            transformer_tts.set_dict(model_dict)
+            transformer_tts.eval()
 
         model = FastSpeech(cfg)
         model.train()
@@ -100,13 +101,33 @@ def main(args):
 
             for i, data in enumerate(pbar):
                 pbar.set_description('Processing at epoch %d' % epoch)
-                character, mel, mel_input, pos_text, pos_mel, text_length, mel_lens = data
+                (character, mel, mel_input, pos_text, pos_mel, text_length,
+                 mel_lens, enc_slf_mask, enc_query_mask, dec_slf_mask,
+                 enc_dec_mask, dec_query_slf_mask, dec_query_mask) = data
 
-                _, _, attn_probs, _, _, _ = transformerTTS(
-                    character, mel_input, pos_text, pos_mel)
-                alignment = dg.to_variable(
-                    get_alignment(attn_probs, mel_lens, cfg[
-                        'transformer_head'])).astype(np.float32)
+                _, _, attn_probs, _, _, _ = transformer_tts(
+                    character,
+                    mel_input,
+                    pos_text,
+                    pos_mel,
+                    dec_slf_mask=dec_slf_mask,
+                    enc_slf_mask=enc_slf_mask,
+                    enc_query_mask=enc_query_mask,
+                    enc_dec_mask=enc_dec_mask,
+                    dec_query_slf_mask=dec_query_slf_mask,
+                    dec_query_mask=dec_query_mask)
+                alignment, max_attn = get_alignment(attn_probs, mel_lens,
+                                                    cfg['transformer_head'])
+                alignment = dg.to_variable(alignment).astype(np.float32)
+
+                if local_rank == 0 and global_step % 5 == 1:
+                    x = np.uint8(
+                        cm.viridis(max_attn[8, :mel_lens.numpy()[8]]) * 255)
+                    writer.add_image(
+                        'Attention_%d_0' % global_step,
+                        x,
+                        0,
+                        dataformats="HWC")
 
                 global_step += 1
 
@@ -115,7 +136,11 @@ def main(args):
                     character,
                     pos_text,
                     mel_pos=pos_mel,
-                    length_target=alignment)
+                    length_target=alignment,
+                    enc_non_pad_mask=enc_query_mask,
+                    enc_slf_attn_mask=enc_slf_mask,
+                    dec_non_pad_mask=dec_query_slf_mask,
+                    dec_slf_attn_mask=dec_slf_mask)
                 mel_output, mel_output_postnet, duration_predictor_output, _, _ = result
                 mel_loss = layers.mse_loss(mel_output, mel)
                 mel_postnet_loss = layers.mse_loss(mel_output_postnet, mel)

examples/fastspeech/train.sh

 # train model
 # if you wish to resume from an exists model, uncomment --checkpoint_path and --fastspeech_step
-CUDA_VISIBLE_DEVICES=0\
+export CUDA_VISIBLE_DEVICES=0
 python -u train.py \
 --batch_size=32 \
 --epochs=10000 \

examples/transformer_tts/config/synthesis.yaml → examples/transformer_tts/configs/synthesis.yaml

@@ -9,3 +9,6 @@ audio:
   min_level_db: -100
   ref_level_db: 20
   outputs_per_step: 1
+
+hidden_size: 256
+embedding_size: 512
\ No newline at end of file

examples/transformer_tts/data.py

@@ -23,7 +23,8 @@ from parakeet import audio
 from parakeet.data.sampler import *
 from parakeet.data.datacargo import DataCargo
 from parakeet.data.batch import TextIDBatcher, SpecBatcher
-from parakeet.data.dataset import DatasetMixin, TransformDataset
+from parakeet.data.dataset import DatasetMixin, TransformDataset, CacheDataset
+from parakeet.models.transformer_tts.utils import *
 
 
 class LJSpeechLoader:
@@ -40,6 +41,8 @@ class LJSpeechLoader:
         metadata = LJSpeechMetaData(LJSPEECH_ROOT)
         transformer = LJSpeech(config)
         dataset = TransformDataset(metadata, transformer)
+        dataset = CacheDataset(dataset)
+
         sampler = DistributedSampler(
             len(metadata), nranks, rank, shuffle=shuffle)
 
@@ -196,8 +199,18 @@ def batch_examples(batch):
         SpecBatcher(pad_value=0.)(mels), axes=(0, 2, 1))  #(B,T,num_mels)
     mel_inputs = np.transpose(
         SpecBatcher(pad_value=0.)(mel_inputs), axes=(0, 2, 1))  #(B,T,num_mels)
+    enc_slf_mask = get_attn_key_pad_mask(pos_texts, texts).astype(np.float32)
+    enc_query_mask = get_non_pad_mask(pos_texts).astype(np.float32)
+    dec_slf_mask = get_dec_attn_key_pad_mask(pos_mels,
+                                             mel_inputs).astype(np.float32)
+    enc_dec_mask = get_attn_key_pad_mask(enc_query_mask[:, :, 0],
+                                         mel_inputs).astype(np.float32)
+    dec_query_slf_mask = get_non_pad_mask(pos_mels).astype(np.float32)
+    dec_query_mask = get_non_pad_mask(pos_mels).astype(np.float32)
+
     return (texts, mels, mel_inputs, pos_texts, pos_mels, np.array(text_lens),
-            np.array(mel_lens))
+            np.array(mel_lens), enc_slf_mask, enc_query_mask, dec_slf_mask,
+            enc_dec_mask, dec_query_slf_mask, dec_query_mask)
 
 
 def batch_examples_vocoder(batch):

examples/transformer_tts/synthesis.py

@@ -16,6 +16,7 @@ from scipy.io.wavfile import write
 from parakeet.g2p.en import text_to_sequence
 import numpy as np
 from tqdm import tqdm
+from matplotlib import cm
 from tensorboardX import SummaryWriter
 from ruamel import yaml
 import paddle.fluid as fluid
@@ -25,6 +26,7 @@ import argparse
 from parse import add_config_options_to_parser
 from pprint import pprint
 from collections import OrderedDict
+from parakeet.models.transformer_tts.utils import *
 from parakeet import audio
 from parakeet.models.transformer_tts.vocoder import Vocoder
 from parakeet.models.transformer_tts.transformer_tts import TransformerTTS
@@ -78,14 +80,18 @@ def synthesis(text_input, args):
         pos_text = fluid.layers.unsqueeze(dg.to_variable(pos_text), [0])
 
         pbar = tqdm(range(args.max_len))
-
         for i in pbar:
+            dec_slf_mask = get_triu_tensor(
+                mel_input.numpy(), mel_input.numpy()).astype(np.float32)
+            dec_slf_mask = fluid.layers.cast(
+                dg.to_variable(dec_slf_mask == 0), np.float32)
             pos_mel = np.arange(1, mel_input.shape[1] + 1)
             pos_mel = fluid.layers.unsqueeze(dg.to_variable(pos_mel), [0])
             mel_pred, postnet_pred, attn_probs, stop_preds, attn_enc, attn_dec = model(
-                text, mel_input, pos_text, pos_mel)
+                text, mel_input, pos_text, pos_mel, dec_slf_mask)
             mel_input = fluid.layers.concat(
                 [mel_input, postnet_pred[:, -1:, :]], axis=1)
+
         mag_pred = model_vocoder(postnet_pred)
 
         _ljspeech_processor = audio.AudioProcessor(
@@ -111,6 +117,33 @@ def synthesis(text_input, args):
         wav = _ljspeech_processor.inv_spectrogram(
             fluid.layers.transpose(
                 fluid.layers.squeeze(mag_pred, [0]), [1, 0]).numpy())
+        global_step = 0
+        for i, prob in enumerate(attn_probs):
+            for j in range(4):
+                x = np.uint8(cm.viridis(prob.numpy()[j]) * 255)
+                writer.add_image(
+                    'Attention_%d_0' % global_step,
+                    x,
+                    i * 4 + j,
+                    dataformats="HWC")
+
+        for i, prob in enumerate(attn_enc):
+            for j in range(4):
+                x = np.uint8(cm.viridis(prob.numpy()[j]) * 255)
+                writer.add_image(
+                    'Attention_enc_%d_0' % global_step,
+                    x,
+                    i * 4 + j,
+                    dataformats="HWC")
+
+        for i, prob in enumerate(attn_dec):
+            for j in range(4):
+                x = np.uint8(cm.viridis(prob.numpy()[j]) * 255)
+                writer.add_image(
+                    'Attention_dec_%d_0' % global_step,
+                    x,
+                    i * 4 + j,
+                    dataformats="HWC")
         writer.add_audio(text_input, wav, 0, cfg['audio']['sr'])
         if not os.path.exists(args.sample_path):
             os.mkdir(args.sample_path)
@@ -124,4 +157,6 @@ if __name__ == '__main__':
     parser = argparse.ArgumentParser(description="Synthesis model")
     add_config_options_to_parser(parser)
     args = parser.parse_args()
-    synthesis("Transformer model is so fast!", args)
+    synthesis(
+        "They emphasized the necessity that the information now being furnished be handled with judgment and care.",
+        args)

examples/transformer_tts/synthesis.sh

@@ -2,10 +2,10 @@
 # train model
 CUDA_VISIBLE_DEVICES=0 \
 python -u synthesis.py \
---max_len=50 \
+--max_len=600 \
 --transformer_step=160000 \
---vocoder_step=70000 \
---use_gpu=1
+--vocoder_step=90000 \
+--use_gpu=1 \
 --checkpoint_path='./checkpoint' \
 --log_dir='./log' \
 --sample_path='./sample' \

examples/transformer_tts/train_transformer.py

@@ -14,7 +14,7 @@
 import os
 from tqdm import tqdm
 from tensorboardX import SummaryWriter
-from pathlib import Path
+#from pathlib import Path
 from collections import OrderedDict
 import argparse
 from parse import add_config_options_to_parser
@@ -89,21 +89,31 @@ def main(args):
             pbar = tqdm(reader)
             for i, data in enumerate(pbar):
                 pbar.set_description('Processing at epoch %d' % epoch)
-                character, mel, mel_input, pos_text, pos_mel, text_length, _ = data
+                character, mel, mel_input, pos_text, pos_mel, text_length, _, enc_slf_mask, enc_query_mask, dec_slf_mask, enc_dec_mask, dec_query_slf_mask, dec_query_mask = data
 
                 global_step += 1
-                mel_pred, postnet_pred, attn_probs, stop_preds, attn_enc, attn_dec = model(
-                    character, mel_input, pos_text, pos_mel)
 
-                label = (pos_mel == 0).astype(np.float32)
+                mel_pred, postnet_pred, attn_probs, stop_preds, attn_enc, attn_dec = model(
+                    character,
+                    mel_input,
+                    pos_text,
+                    pos_mel,
+                    dec_slf_mask=dec_slf_mask,
+                    enc_slf_mask=enc_slf_mask,
+                    enc_query_mask=enc_query_mask,
+                    enc_dec_mask=enc_dec_mask,
+                    dec_query_slf_mask=dec_query_slf_mask,
+                    dec_query_mask=dec_query_mask)
 
                 mel_loss = layers.mean(
                     layers.abs(layers.elementwise_sub(mel_pred, mel)))
                 post_mel_loss = layers.mean(
                     layers.abs(layers.elementwise_sub(postnet_pred, mel)))
                 loss = mel_loss + post_mel_loss
+
                 # Note: When used stop token loss the learning did not work.
                 if args.stop_token:
+                    label = (pos_mel == 0).astype(np.float32)
                     stop_loss = cross_entropy(stop_preds, label)
                     loss = loss + stop_loss
 

examples/transformer_tts/train_transformer.sh

 
 # train model
 # if you wish to resume from an exists model, uncomment --checkpoint_path and --transformer_step
-CUDA_VISIBLE_DEVICES=0 \
+export CUDA_VISIBLE_DEVICES=2
 python -u train_transformer.py \
 --batch_size=32 \
 --epochs=10000 \

examples/waveflow/README.md

@@ -99,7 +99,7 @@ python -u synthesis.py \
     --sigma=1.0
 ```
 
-In this example, `--output` specifies where to save the synthesized audios and `--sample` specifies which sample in the valid dataset (a split from the whole LJSpeech dataset, by default contains the first 16 audio samples) to synthesize based on the mel-spectrograms computed from the ground truth sample audio, e.g., `--sample=0` means to synthesize the first audio in the valid dataset.
+In this example, `--output` specifies where to save the synthesized audios and `--sample` (<16) specifies which sample in the valid dataset (a split from the whole LJSpeech dataset, by default contains the first 16 audio samples) to synthesize based on the mel-spectrograms computed from the ground truth sample audio, e.g., `--sample=0` means to synthesize the first audio in the valid dataset.
 
 ### Benchmarking
 

examples/waveflow/utils.py

@@ -109,6 +109,16 @@ def add_yaml_config(config):
 
 
 def load_latest_checkpoint(checkpoint_dir, rank=0):
+    """Get the iteration number corresponding to the latest saved checkpoint
+
+    Args:
+        checkpoint_dir (str): the directory where checkpoint is saved.
+        rank (int, optional): the rank of the process in multi-process setting.
+            Defaults to 0.
+
+    Returns:
+        int: the latest iteration number.
+    """
     checkpoint_path = os.path.join(checkpoint_dir, "checkpoint")
     # Create checkpoint index file if not exist.
     if (not os.path.isfile(checkpoint_path)) and rank == 0:
@@ -129,6 +139,15 @@ def load_latest_checkpoint(checkpoint_dir, rank=0):
 
 
 def save_latest_checkpoint(checkpoint_dir, iteration):
+    """Save the iteration number of the latest model to be checkpointed.
+
+    Args:
+        checkpoint_dir (str): the directory where checkpoint is saved.
+        iteration (int): the latest iteration number.
+
+    Returns:
+        None
+    """
     checkpoint_path = os.path.join(checkpoint_dir, "checkpoint")
     # Update the latest checkpoint index.
     with open(checkpoint_path, "w") as handle:
@@ -142,6 +161,24 @@ def load_parameters(checkpoint_dir,
                     iteration=None,
                     file_path=None,
                     dtype="float32"):
+    """Load a specific model checkpoint from disk.
+
+    Args:
+        checkpoint_dir (str): the directory where checkpoint is saved.
+        rank (int): the rank of the process in multi-process setting.
+        model (obj): model to load parameters.
+        optimizer (obj, optional): optimizer to load states if needed.
+            Defaults to None.
+        iteration (int, optional): if specified, load the specific checkpoint,
+            if not specified, load the latest one. Defaults to None.
+        file_path (str, optional): if specified, load the checkpoint
+            stored in the file_path. Defaults to None.
+        dtype (str, optional): precision of the model parameters.
+            Defaults to float32.
+
+    Returns:
+        None
+    """
     if file_path is None:
         if iteration is None:
             iteration = load_latest_checkpoint(checkpoint_dir, rank)
@@ -165,6 +202,18 @@ def load_parameters(checkpoint_dir,
 
 
 def save_latest_parameters(checkpoint_dir, iteration, model, optimizer=None):
+    """Checkpoint the latest trained model parameters.
+
+    Args:
+        checkpoint_dir (str): the directory where checkpoint is saved.
+        iteration (int): the latest iteration number.
+        model (obj): model to be checkpointed.
+        optimizer (obj, optional): optimizer to be checkpointed.
+            Defaults to None.
+
+    Returns:
+        None
+    """
     file_path = "{}/step-{}".format(checkpoint_dir, iteration)
     model_dict = model.state_dict()
     dg.save_dygraph(model_dict, file_path)

parakeet/data/dataset.py

@@ -14,6 +14,7 @@
 
 import six
 import numpy as np
+from tqdm import tqdm
 
 
 class DatasetMixin(object):

parakeet/models/fastspeech/decoder.py

@@ -32,6 +32,7 @@ class Decoder(dg.Layer):
         super(Decoder, self).__init__()
 
         n_position = len_max_seq + 1
+        self.n_head = n_head
         self.pos_inp = get_sinusoid_encoding_table(
             n_position, d_model, padding_idx=0)
         self.position_enc = dg.Embedding(
@@ -55,7 +56,7 @@ class Decoder(dg.Layer):
         for i, layer in enumerate(self.layer_stack):
             self.add_sublayer('fft_{}'.format(i), layer)
 
-    def forward(self, enc_seq, enc_pos):
+    def forward(self, enc_seq, enc_pos, non_pad_mask, slf_attn_mask=None):
         """
         Decoder layer of FastSpeech.
         
@@ -69,10 +70,7 @@ class Decoder(dg.Layer):
             dec_slf_attn_list (Variable), Shape(B, mel_T, mel_T), the decoder self attention list.
         """
         dec_slf_attn_list = []
-
-        # -- Prepare masks
-        slf_attn_mask = get_attn_key_pad_mask(seq_k=enc_pos, seq_q=enc_pos)
-        non_pad_mask = get_non_pad_mask(enc_pos)
+        slf_attn_mask = layers.expand(slf_attn_mask, [self.n_head, 1, 1])
 
         # -- Forward
         dec_output = enc_seq + self.position_enc(enc_pos)

parakeet/models/fastspeech/encoder.py

@@ -32,14 +32,17 @@ class Encoder(dg.Layer):
                  dropout=0.1):
         super(Encoder, self).__init__()
         n_position = len_max_seq + 1
+        self.n_head = n_head
 
         self.src_word_emb = dg.Embedding(
-            size=[n_src_vocab, d_model], padding_idx=0)
+            size=[n_src_vocab, d_model],
+            padding_idx=0,
+            param_attr=fluid.initializer.Normal(
+                loc=0.0, scale=1.0))
         self.pos_inp = get_sinusoid_encoding_table(
             n_position, d_model, padding_idx=0)
         self.position_enc = dg.Embedding(
             size=[n_position, d_model],
-            padding_idx=0,
             param_attr=fluid.ParamAttr(
                 initializer=fluid.initializer.NumpyArrayInitializer(
                     self.pos_inp),
@@ -58,7 +61,7 @@ class Encoder(dg.Layer):
         for i, layer in enumerate(self.layer_stack):
             self.add_sublayer('fft_{}'.format(i), layer)
 
-    def forward(self, character, text_pos):
+    def forward(self, character, text_pos, non_pad_mask, slf_attn_mask=None):
         """
         Encoder layer of FastSpeech.
         
@@ -74,10 +77,7 @@ class Encoder(dg.Layer):
             enc_slf_attn_list (list<Variable>), Len(n_layers), Shape(B * n_head, text_T, text_T), the encoder self attention list.
         """
         enc_slf_attn_list = []
-        # -- prepare masks
-        # shape character (N, T)
-        slf_attn_mask = get_attn_key_pad_mask(seq_k=character, seq_q=character)
-        non_pad_mask = get_non_pad_mask(character)
+        slf_attn_mask = layers.expand(slf_attn_mask, [self.n_head, 1, 1])
 
         # -- Forward
         enc_output = self.src_word_emb(character) + self.position_enc(
@@ -90,4 +90,4 @@ class Encoder(dg.Layer):
                 slf_attn_mask=slf_attn_mask)
             enc_slf_attn_list += [enc_slf_attn]
 
-        return enc_output, non_pad_mask, enc_slf_attn_list
+        return enc_output, enc_slf_attn_list

parakeet/models/fastspeech/fastspeech.py

@@ -12,9 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import math
+import numpy as np
 import paddle.fluid.dygraph as dg
 import paddle.fluid as fluid
 from parakeet.g2p.text.symbols import symbols
+from parakeet.models.transformer_tts.utils import *
 from parakeet.models.transformer_tts.post_convnet import PostConvNet
 from parakeet.models.fastspeech.length_regulator import LengthRegulator
 from parakeet.models.fastspeech.encoder import Encoder
@@ -78,6 +80,10 @@ class FastSpeech(dg.Layer):
     def forward(self,
                 character,
                 text_pos,
+                enc_non_pad_mask,
+                dec_non_pad_mask,
+                enc_slf_attn_mask=None,
+                dec_slf_attn_mask=None,
                 mel_pos=None,
                 length_target=None,
                 alpha=1.0):
@@ -106,14 +112,20 @@ class FastSpeech(dg.Layer):
             dec_slf_attn_list (Variable), Shape(B, mel_T, mel_T), the decoder self attention list.
         """
 
-        encoder_output, non_pad_mask, enc_slf_attn_list = self.encoder(
-            character, text_pos)
+        encoder_output, enc_slf_attn_list = self.encoder(
+            character,
+            text_pos,
+            enc_non_pad_mask,
+            slf_attn_mask=enc_slf_attn_mask)
         if fluid.framework._dygraph_tracer()._train_mode:
 
             length_regulator_output, duration_predictor_output = self.length_regulator(
                 encoder_output, target=length_target, alpha=alpha)
             decoder_output, dec_slf_attn_list = self.decoder(
-                length_regulator_output, mel_pos)
+                length_regulator_output,
+                mel_pos,
+                dec_non_pad_mask,
+                slf_attn_mask=dec_slf_attn_mask)
 
             mel_output = self.mel_linear(decoder_output)
             mel_output_postnet = self.postnet(mel_output) + mel_output
@@ -122,8 +134,18 @@ class FastSpeech(dg.Layer):
         else:
             length_regulator_output, decoder_pos = self.length_regulator(
                 encoder_output, alpha=alpha)
-            decoder_output, _ = self.decoder(length_regulator_output,
-                                             decoder_pos)
+            slf_attn_mask = get_triu_tensor(
+                decoder_pos.numpy(), decoder_pos.numpy()).astype(np.float32)
+            slf_attn_mask = fluid.layers.cast(
+                dg.to_variable(slf_attn_mask == 0), np.float32)
+            slf_attn_mask = dg.to_variable(slf_attn_mask)
+            dec_non_pad_mask = fluid.layers.unsqueeze(
+                (decoder_pos != 0).astype(np.float32), [-1])
+            decoder_output, _ = self.decoder(
+                length_regulator_output,
+                decoder_pos,
+                dec_non_pad_mask,
+                slf_attn_mask=slf_attn_mask)
             mel_output = self.mel_linear(decoder_output)
             mel_output_postnet = self.postnet(mel_output) + mel_output
 

parakeet/models/fastspeech/fft_block.py

@@ -46,7 +46,7 @@ class FFTBlock(dg.Layer):
             padding=padding,
             dropout=dropout)
 
-    def forward(self, enc_input, non_pad_mask=None, slf_attn_mask=None):
+    def forward(self, enc_input, non_pad_mask, slf_attn_mask=None):
         """
         Feed Forward Transformer block in FastSpeech.
         
@@ -63,6 +63,7 @@ class FFTBlock(dg.Layer):
         """
         output, slf_attn = self.slf_attn(
             enc_input, enc_input, enc_input, mask=slf_attn_mask)
+
         output *= non_pad_mask
 
         output = self.pos_ffn(output)

parakeet/models/fastspeech/length_regulator.py

@@ -146,11 +146,17 @@ class DurationPredictor(dg.Layer):
         out = layers.transpose(encoder_output, [0, 2, 1])
         out = self.conv1(out)
         out = layers.transpose(out, [0, 2, 1])
-        out = layers.dropout(layers.relu(self.layer_norm1(out)), self.dropout)
+        out = layers.dropout(
+            layers.relu(self.layer_norm1(out)),
+            self.dropout,
+            dropout_implementation='upscale_in_train')
         out = layers.transpose(out, [0, 2, 1])
         out = self.conv2(out)
         out = layers.transpose(out, [0, 2, 1])
-        out = layers.dropout(layers.relu(self.layer_norm2(out)), self.dropout)
+        out = layers.dropout(
+            layers.relu(self.layer_norm2(out)),
+            self.dropout,
+            dropout_implementation='upscale_in_train')
         out = layers.relu(self.linear(out))
         out = layers.squeeze(out, axes=[-1])
 

parakeet/models/fastspeech/utils.py

@@ -18,7 +18,6 @@ def get_alignment(attn_probs, mel_lens, n_head):
     max_F = 0
     assert attn_probs[0].shape[0] % n_head == 0
     batch_size = int(attn_probs[0].shape[0] // n_head)
-    #max_attn = attn_probs[0].numpy()[0,batch_size]
     for i in range(len(attn_probs)):
         multi_attn = attn_probs[i].numpy()
         for j in range(n_head):
@@ -28,7 +27,7 @@ def get_alignment(attn_probs, mel_lens, n_head):
                 max_F = F
                 max_attn = attn
     alignment = compute_duration(max_attn, mel_lens)
-    return alignment
+    return alignment, max_attn
 
 
 def score_F(attn):

parakeet/models/transformer_tts/decoder.py

@@ -14,7 +14,7 @@
 import math
 import paddle.fluid.dygraph as dg
 import paddle.fluid as fluid
-from parakeet.modules.utils import *
+from parakeet.models.transformer_tts.utils import *
 from parakeet.modules.multihead_attention import MultiheadAttention
 from parakeet.modules.ffn import PositionwiseFeedForward
 from parakeet.models.transformer_tts.prenet import PreNet
@@ -25,6 +25,7 @@ class Decoder(dg.Layer):
     def __init__(self, num_hidden, config, num_head=4):
         super(Decoder, self).__init__()
         self.num_hidden = num_hidden
+        self.num_head = num_head
         param = fluid.ParamAttr()
         self.alpha = self.create_parameter(
             shape=(1, ),
@@ -98,30 +99,29 @@ class Decoder(dg.Layer):
             outputs_per_step=config['audio']['outputs_per_step'],
             use_cudnn=True)
 
-    def forward(self, key, value, query, c_mask, positional):
+    def forward(self,
+                key,
+                value,
+                query,
+                positional,
+                mask,
+                m_mask=None,
+                m_self_mask=None,
+                zero_mask=None):
 
         # get decoder mask with triangular matrix
 
         if fluid.framework._dygraph_tracer()._train_mode:
-            m_mask = get_non_pad_mask(positional)
-            mask = get_attn_key_pad_mask((positional == 0).astype(np.float32),
-                                         query)
-            triu_tensor = dg.to_variable(
-                get_triu_tensor(query.numpy(), query.numpy())).astype(
-                    np.float32)
-            mask = mask + triu_tensor
-            mask = fluid.layers.cast(mask == 0, np.float32)
-
-            # (batch_size, decoder_len, encoder_len)
-            zero_mask = get_attn_key_pad_mask(
-                layers.squeeze(c_mask, [-1]), query)
+            m_mask = layers.expand(m_mask, [self.num_head, 1, key.shape[1]])
+            m_self_mask = layers.expand(m_self_mask,
+                                        [self.num_head, 1, query.shape[1]])
+            mask = layers.expand(mask, [self.num_head, 1, 1])
+            zero_mask = layers.expand(zero_mask, [self.num_head, 1, 1])
+
         else:
-            mask = get_triu_tensor(query.numpy(),
-                                   query.numpy()).astype(np.float32)
-            mask = fluid.layers.cast(dg.to_variable(mask == 0), np.float32)
-            m_mask, zero_mask = None, None
+            m_mask, m_self_mask, zero_mask = None, None, None
 
-        # Decoder pre-network
+# Decoder pre-network
         query = self.decoder_prenet(query)
 
         # Centered position
@@ -132,7 +132,8 @@ class Decoder(dg.Layer):
         query = positional * self.alpha + query
 
         #positional dropout
-        query = fluid.layers.dropout(query, 0.1)
+        query = fluid.layers.dropout(
+            query, 0.1, dropout_implementation='upscale_in_train')
 
         # Attention decoder-decoder, encoder-decoder
         selfattn_list = list()
@@ -141,12 +142,13 @@ class Decoder(dg.Layer):
         for selfattn, attn, ffn in zip(self.selfattn_layers, self.attn_layers,
                                        self.ffns):
             query, attn_dec = selfattn(
-                query, query, query, mask=mask, query_mask=m_mask)
+                query, query, query, mask=mask, query_mask=m_self_mask)
             query, attn_dot = attn(
                 key, value, query, mask=zero_mask, query_mask=m_mask)
             query = ffn(query)
             selfattn_list.append(attn_dec)
             attn_list.append(attn_dot)
+
         # Mel linear projection
         mel_out = self.mel_linear(query)
         # Post Mel Network

parakeet/models/transformer_tts/encoder.py

@@ -23,6 +23,7 @@ class Encoder(dg.Layer):
     def __init__(self, embedding_size, num_hidden, num_head=4):
         super(Encoder, self).__init__()
         self.num_hidden = num_hidden
+        self.num_head = num_head
         param = fluid.ParamAttr(initializer=fluid.initializer.Constant(
             value=1.0))
         self.alpha = self.create_parameter(
@@ -31,7 +32,6 @@ class Encoder(dg.Layer):
             1024, self.num_hidden, padding_idx=0)
         self.pos_emb = dg.Embedding(
             size=[1024, num_hidden],
-            padding_idx=0,
             param_attr=fluid.ParamAttr(
                 initializer=fluid.initializer.NumpyArrayInitializer(
                     self.pos_inp),
@@ -56,13 +56,15 @@ class Encoder(dg.Layer):
         for i, layer in enumerate(self.ffns):
             self.add_sublayer("ffns_{}".format(i), layer)
 
-    def forward(self, x, positional):
+    def forward(self, x, positional, mask=None, query_mask=None):
+
         if fluid.framework._dygraph_tracer()._train_mode:
-            query_mask = get_non_pad_mask(positional)
-            mask = get_attn_key_pad_mask(positional, x)
+            seq_len_key = x.shape[1]
+            query_mask = layers.expand(query_mask,
+                                       [self.num_head, 1, seq_len_key])
+            mask = layers.expand(mask, [self.num_head, 1, 1])
         else:
             query_mask, mask = None, None
-
         # Encoder pre_network
         x = self.encoder_prenet(x)  #(N,T,C)
 
@@ -72,7 +74,7 @@ class Encoder(dg.Layer):
         x = positional * self.alpha + x  #(N, T, C)
 
         # Positional dropout
-        x = layers.dropout(x, 0.1)
+        x = layers.dropout(x, 0.1, dropout_implementation='upscale_in_train')
 
         # Self attention encoder
         attentions = list()
@@ -81,4 +83,4 @@ class Encoder(dg.Layer):
             x = ffn(x)
             attentions.append(attention)
 
-        return x, query_mask, attentions
+        return x, attentions

parakeet/models/transformer_tts/encoderprenet.py

@@ -27,7 +27,10 @@ class EncoderPrenet(dg.Layer):
         self.num_hidden = num_hidden
         self.use_cudnn = use_cudnn
         self.embedding = dg.Embedding(
-            size=[len(symbols), embedding_size], padding_idx=None)
+            size=[len(symbols), embedding_size],
+            padding_idx=0,
+            param_attr=fluid.initializer.Normal(
+                loc=0.0, scale=1.0))
         self.conv_list = []
         k = math.sqrt(1 / embedding_size)
         self.conv_list.append(
@@ -78,10 +81,14 @@ class EncoderPrenet(dg.Layer):
                 low=-k, high=k)))
 
     def forward(self, x):
+
         x = self.embedding(x)  #(batch_size, seq_len, embending_size)
         x = layers.transpose(x, [0, 2, 1])
         for batch_norm, conv in zip(self.batch_norm_list, self.conv_list):
-            x = layers.dropout(layers.relu(batch_norm(conv(x))), 0.2)
+            x = layers.dropout(
+                layers.relu(batch_norm(conv(x))),
+                0.2,
+                dropout_implementation='upscale_in_train')
         x = layers.transpose(x, [0, 2, 1])  #(N,T,C)
         x = self.projection(x)
 

parakeet/models/transformer_tts/post_convnet.py

@@ -108,11 +108,16 @@ class PostConvNet(dg.Layer):
             conv = self.conv_list[i]
 
             input = layers.dropout(
-                layers.tanh(batch_norm(conv(input)[:, :, :len])), self.dropout)
+                layers.tanh(batch_norm(conv(input)[:, :, :len])),
+                self.dropout,
+                dropout_implementation='upscale_in_train')
         conv = self.conv_list[self.num_conv - 1]
         input = conv(input)[:, :, :len]
         if self.batchnorm_last:
             batch_norm = self.batch_norm_list[self.num_conv - 1]
-            input = layers.dropout(batch_norm(input), self.dropout)
+            input = layers.dropout(
+                batch_norm(input),
+                self.dropout,
+                dropout_implementation='upscale_in_train')
         output = layers.transpose(input, [0, 2, 1])
         return output

parakeet/models/transformer_tts/prenet.py

@@ -56,6 +56,12 @@ class PreNet(dg.Layer):
         Returns:
             x (Variable), Shape(B, T, C), the result after pernet.
         """
-        x = layers.dropout(layers.relu(self.linear1(x)), self.dropout_rate)
-        x = layers.dropout(layers.relu(self.linear2(x)), self.dropout_rate)
+        x = layers.dropout(
+            layers.relu(self.linear1(x)),
+            self.dropout_rate,
+            dropout_implementation='upscale_in_train')
+        x = layers.dropout(
+            layers.relu(self.linear2(x)),
+            self.dropout_rate,
+            dropout_implementation='upscale_in_train')
         return x

parakeet/models/transformer_tts/transformer_tts.py

@@ -24,11 +24,29 @@ class TransformerTTS(dg.Layer):
         self.decoder = Decoder(config['hidden_size'], config)
         self.config = config
 
-    def forward(self, characters, mel_input, pos_text, pos_mel):
-
-        key, c_mask, attns_enc = self.encoder(characters, pos_text)
+    def forward(self,
+                characters,
+                mel_input,
+                pos_text,
+                pos_mel,
+                dec_slf_mask,
+                enc_slf_mask=None,
+                enc_query_mask=None,
+                enc_dec_mask=None,
+                dec_query_slf_mask=None,
+                dec_query_mask=None):
+        key, attns_enc = self.encoder(
+            characters, pos_text, mask=enc_slf_mask, query_mask=enc_query_mask)
 
         mel_output, postnet_output, attn_probs, stop_preds, attns_dec = self.decoder(
-            key, key, mel_input, c_mask, pos_mel)
+            key,
+            key,
+            mel_input,
+            pos_mel,
+            mask=dec_slf_mask,
+            zero_mask=enc_dec_mask,
+            m_self_mask=dec_query_slf_mask,
+            m_mask=dec_query_mask)
+        return mel_output, postnet_output, attn_probs, stop_preds, attns_enc, attns_dec
 
         return mel_output, postnet_output, attn_probs, stop_preds, attns_enc, attns_dec

parakeet/models/transformer_tts/utils.py

@@ -51,7 +51,9 @@ def get_sinusoid_encoding_table(n_position, d_hid, padding_idx=None):
 
 
 def get_non_pad_mask(seq):
-    return layers.unsqueeze((seq != 0).astype(np.float32), [-1])
+    mask = (seq != 0).astype(np.float32)
+    mask = np.expand_dims(mask, axis=-1)
+    return mask
 
 
 def get_attn_key_pad_mask(seq_k, seq_q):
@@ -60,8 +62,22 @@ def get_attn_key_pad_mask(seq_k, seq_q):
     # Expand to fit the shape of key query attention matrix.
     len_q = seq_q.shape[1]
     padding_mask = (seq_k != 0).astype(np.float32)
-    padding_mask = layers.expand(
-        layers.unsqueeze(padding_mask, [1]), [1, len_q, 1])
+    padding_mask = np.expand_dims(padding_mask, axis=1)
+    padding_mask = padding_mask.repeat([len_q], axis=1)
+    padding_mask = (padding_mask == 0).astype(np.float32) * (-2**32 + 1)
+    return padding_mask
+
+
+def get_dec_attn_key_pad_mask(seq_k, seq_q):
+    ''' For masking out the padding part of key sequence. '''
+
+    # Expand to fit the shape of key query attention matrix.
+    len_q = seq_q.shape[1]
+    padding_mask = (seq_k == 0).astype(np.float32)
+    padding_mask = np.expand_dims(padding_mask, axis=1)
+    triu_tensor = get_triu_tensor(seq_q, seq_q)
+    padding_mask = padding_mask.repeat([len_q], axis=1) + triu_tensor
+    padding_mask = (padding_mask != 0).astype(np.float32) * (-2**32 + 1)
     return padding_mask
 
 

parakeet/models/waveflow/data.py

@@ -80,6 +80,7 @@ class Subset(DatasetMixin):
             # whole audio for valid set
             pass
         else:
+            # Randomly crop segment_length from audios in the training set.
             # audio shape: [len]
             if audio.shape[0] >= segment_length:
                 max_audio_start = audio.shape[0] - segment_length

parakeet/models/waveflow/waveflow.py

@@ -28,6 +28,25 @@ from .waveflow_modules import WaveFlowLoss, WaveFlowModule
 
 
 class WaveFlow():
+    """Wrapper class of WaveFlow model that supports multiple APIs.
+
+    This module provides APIs for model building, training, validation,
+    inference, benchmarking, and saving.
+
+    Args:
+        config (obj): config info.
+        checkpoint_dir (str): path for checkpointing.
+        parallel (bool, optional): whether use multiple GPUs for training.
+            Defaults to False.
+        rank (int, optional): the rank of the process in a multi-process
+            scenario. Defaults to 0.
+        nranks (int, optional): the total number of processes. Defaults to 1.
+        tb_logger (obj, optional): logger to visualize metrics.
+            Defaults to None.
+
+    Returns:
+        WaveFlow
+    """
     def __init__(self,
                  config,
                  checkpoint_dir,
@@ -44,6 +63,15 @@ class WaveFlow():
         self.dtype = "float16" if config.use_fp16 else "float32"
 
     def build(self, training=True):
+        """Initialize the model.
+
+        Args:
+            training (bool, optional): Whether the model is built for training or inference.
+                Defaults to True.
+
+        Returns:
+            None
+        """
         config = self.config
         dataset = LJSpeech(config, self.nranks, self.rank)
         self.trainloader = dataset.trainloader
@@ -99,6 +127,14 @@ class WaveFlow():
             self.waveflow = waveflow
 
     def train_step(self, iteration):
+        """Train the model for one step.
+
+        Args:
+            iteration (int): current iteration number.
+
+        Returns:
+            None
+        """
         self.waveflow.train()
 
         start_time = time.time()
@@ -135,6 +171,14 @@ class WaveFlow():
 
     @dg.no_grad
     def valid_step(self, iteration):
+        """Run the model on the validation dataset.
+
+        Args:
+            iteration (int): current iteration number.
+
+        Returns:
+            None
+        """
         self.waveflow.eval()
         tb = self.tb_logger
 
@@ -167,6 +211,14 @@ class WaveFlow():
 
     @dg.no_grad
     def infer(self, iteration):
+        """Run the model to synthesize audios.
+
+        Args:
+            iteration (int): iteration number of the loaded checkpoint.
+
+        Returns:
+            None
+        """
         self.waveflow.eval()
 
         config = self.config
@@ -179,10 +231,13 @@ class WaveFlow():
         mels_list = [mels for _, mels in self.validloader()]
         if sample is not None:
             mels_list = [mels_list[sample]]
+        else:
+            sample = 0
 
-        for sample, mel in enumerate(mels_list):
-            filename = "{}/valid_{}.wav".format(output, sample)
-            print("Synthesize sample {}, save as {}".format(sample, filename))
+        for idx, mel in enumerate(mels_list):
+            abs_idx = sample + idx
+            filename = "{}/valid_{}.wav".format(output, abs_idx)
+            print("Synthesize sample {}, save as {}".format(abs_idx, filename))
 
             start_time = time.time()
             audio = self.waveflow.synthesize(mel, sigma=self.config.sigma)
@@ -200,6 +255,14 @@ class WaveFlow():
 
     @dg.no_grad
     def benchmark(self):
+        """Run the model to benchmark synthesis speed.
+
+        Args:
+            None
+
+        Returns:
+            None
+        """
         self.waveflow.eval()
 
         mels_list = [mels for _, mels in self.validloader()]
@@ -220,6 +283,14 @@ class WaveFlow():
             print("{} X real-time".format(audio_time / syn_time))
 
     def save(self, iteration):
+        """Save model checkpoint.
+
+        Args:
+            iteration (int): iteration number of the model to be saved.
+
+        Returns:
+            None
+        """
         utils.save_latest_parameters(self.checkpoint_dir, iteration,
                                      self.waveflow, self.optimizer)
         utils.save_latest_checkpoint(self.checkpoint_dir, iteration)

parakeet/models/waveflow/waveflow_modules.py

@@ -293,6 +293,14 @@ class Flow(dg.Layer):
 
 
 class WaveFlowModule(dg.Layer):
+    """WaveFlow model implementation.
+
+    Args:
+        config (obj): model configuration parameters.
+
+    Returns:
+        WaveFlowModule
+    """
     def __init__(self, config):
         super(WaveFlowModule, self).__init__()
         self.n_flows = config.n_flows
@@ -321,6 +329,22 @@ class WaveFlowModule(dg.Layer):
             self.perms.append(perm)
 
     def forward(self, audio, mel):
+        """Training forward pass.
+
+        Use a conditioner to upsample mel spectrograms into hidden states.
+        These hidden states along with the audio are passed to a stack of Flow
+        modules to obtain the final latent variable z and a list of log scaling
+        variables, which are then passed to the WaveFlowLoss module to calculate
+        the negative log likelihood.
+
+        Args:
+            audio (obj): audio samples.
+            mel (obj): mel spectrograms.
+
+        Returns:
+            z (obj): latent variable.
+            log_s_list(list): list of log scaling variables.
+        """
         mel = self.conditioner(mel)
         assert mel.shape[2] >= audio.shape[1]
         # Prune out the tail of audio/mel so that time/n_group == 0.
@@ -361,6 +385,20 @@ class WaveFlowModule(dg.Layer):
         return z, log_s_list
 
     def synthesize(self, mel, sigma=1.0):
+        """Use model to synthesize waveform.
+
+        Use a conditioner to upsample mel spectrograms into hidden states.
+        These hidden states along with initial random gaussian latent variable
+        are passed to a stack of Flow modules to obtain the audio output.
+
+        Args:
+            mel (obj): mel spectrograms.
+            sigma (float, optional): standard deviation of the guassian latent
+                variable. Defaults to 1.0.
+
+        Returns:
+            audio (obj): synthesized audio.
+        """
         if self.dtype == "float16":
             mel = fluid.layers.cast(mel, self.dtype)
         mel = self.conditioner.infer(mel)

parakeet/modules/dynamic_gru.py

@@ -53,11 +53,9 @@ class DynamicGRU(dg.Layer):
             if self.is_reverse:
                 i = inputs.shape[1] - 1 - i
             input_ = inputs[:, i:i + 1, :]
-            input_ = layers.reshape(
-                input_, [-1, input_.shape[2]], inplace=False)
+            input_ = layers.reshape(input_, [-1, input_.shape[2]])
             hidden, reset, gate = self.gru_unit(input_, hidden)
-            hidden_ = layers.reshape(
-                hidden, [-1, 1, hidden.shape[1]], inplace=False)
+            hidden_ = layers.reshape(hidden, [-1, 1, hidden.shape[1]])
             res.append(hidden_)
         if self.is_reverse:
             res = res[::-1]

parakeet/modules/ffn.py

@@ -71,7 +71,8 @@ class PositionwiseFeedForward(dg.Layer):
         x = self.w_2(layers.relu(self.w_1(x)))
 
         # dropout
-        x = layers.dropout(x, self.dropout)
+        x = layers.dropout(
+            x, self.dropout, dropout_implementation='upscale_in_train')
 
         x = layers.transpose(x, [0, 2, 1])
         # residual connection

parakeet/modules/modules.py

+#   Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
+#
+# 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 paddle
+from paddle import fluid
+import paddle.fluid.dygraph as dg
+
+import numpy as np
+
+from . import conv
+from . import weight_norm
+
+
+def FC(name_scope,
+       in_features,
+       size,
+       num_flatten_dims=1,
+       relu=False,
+       dropout=0.0,
+       epsilon=1e-30,
+       act=None,
+       is_test=False,
+       dtype="float32"):
+    """
+    A special Linear Layer, when it is used with dropout, the weight is 
+    initialized as normal(0, std=np.sqrt((1-dropout) / in_features))
+    """
+
+    # stds
+    if isinstance(in_features, int):
+        in_features = [in_features]
+
+    stds = [np.sqrt((1 - dropout) / in_feature) for in_feature in in_features]
+    if relu:
+        stds = [std * np.sqrt(2.0) for std in stds]
+
+    weight_inits = [
+        fluid.initializer.NormalInitializer(scale=std) for std in stds
+    ]
+    bias_init = fluid.initializer.ConstantInitializer(0.0)
+
+    # param attrs
+    weight_attrs = [fluid.ParamAttr(initializer=init) for init in weight_inits]
+    bias_attr = fluid.ParamAttr(initializer=bias_init)
+
+    layer = weight_norm.FC(name_scope,
+                           size,
+                           num_flatten_dims=num_flatten_dims,
+                           param_attr=weight_attrs,
+                           bias_attr=bias_attr,
+                           act=act,
+                           dtype=dtype)
+    return layer
+
+
+def Conv1D(name_scope,
+           in_channels,
+           num_filters,
+           filter_size=3,
+           dilation=1,
+           groups=None,
+           causal=False,
+           std_mul=1.0,
+           dropout=0.0,
+           use_cudnn=True,
+           act=None,
+           dtype="float32"):
+    """
+    A special Conv1D Layer, when it is used with dropout, the weight is 
+    initialized as 
+    normal(0, std=np.sqrt(std_mul * (1-dropout) / (filter_size * in_features)))
+    """
+    # std
+    std = np.sqrt((std_mul * (1 - dropout)) / (filter_size * in_channels))
+    weight_init = fluid.initializer.NormalInitializer(loc=0.0, scale=std)
+    bias_init = fluid.initializer.ConstantInitializer(0.0)
+
+    # param attrs
+    weight_attr = fluid.ParamAttr(initializer=weight_init)
+    bias_attr = fluid.ParamAttr(initializer=bias_init)
+
+    layer = conv.Conv1D(
+        name_scope,
+        in_channels,
+        num_filters,
+        filter_size,
+        dilation,
+        groups=groups,
+        causal=causal,
+        param_attr=weight_attr,
+        bias_attr=bias_attr,
+        use_cudnn=use_cudnn,
+        act=act,
+        dtype=dtype)
+    return layer
+
+
+def Embedding(name_scope,
+              num_embeddings,
+              embed_dim,
+              is_sparse=False,
+              is_distributed=False,
+              padding_idx=None,
+              std=0.01,
+              dtype="float32"):
+    # param attrs
+    weight_attr = fluid.ParamAttr(initializer=fluid.initializer.Normal(
+        scale=std))
+    layer = dg.Embedding(
+        name_scope, (num_embeddings, embed_dim),
+        padding_idx=padding_idx,
+        param_attr=weight_attr,
+        dtype=dtype)
+    return layer
+
+
+class Conv1DGLU(dg.Layer):
+    """
+    A Convolution 1D block with GLU activation. It also applys dropout for the 
+    input x. It fuses speaker embeddings through a FC activated by softsign. It
+    has residual connection from the input x, and scale the output by 
+    np.sqrt(0.5).
+    """
+
+    def __init__(self,
+                 name_scope,
+                 n_speakers,
+                 speaker_dim,
+                 in_channels,
+                 num_filters,
+                 filter_size,
+                 dilation,
+                 std_mul=4.0,
+                 dropout=0.0,
+                 causal=False,
+                 residual=True,
+                 dtype="float32"):
+        super(Conv1DGLU, self).__init__(name_scope, dtype=dtype)
+
+        # conv spec
+        self.in_channels = in_channels
+        self.n_speakers = n_speakers
+        self.speaker_dim = speaker_dim
+        self.num_filters = num_filters
+        self.filter_size = filter_size
+        self.dilation = dilation
+        self.causal = causal
+        self.residual = residual
+
+        # weight init and dropout
+        self.std_mul = std_mul
+        self.dropout = dropout
+
+        if residual:
+            assert (
+                in_channels == num_filters
+            ), "this block uses residual connection"\
+                "the input_channes should equals num_filters"
+
+        self.conv = Conv1D(
+            self.full_name(),
+            in_channels,
+            2 * num_filters,
+            filter_size,
+            dilation,
+            causal=causal,
+            std_mul=std_mul,
+            dropout=dropout,
+            dtype=dtype)
+
+        if n_speakers > 1:
+            assert (speaker_dim is not None
+                    ), "speaker embed should not be null in multi-speaker case"
+            self.fc = Conv1D(
+                self.full_name(),
+                speaker_dim,
+                num_filters,
+                filter_size=1,
+                dilation=1,
+                causal=False,
+                act="softsign",
+                dtype=dtype)
+
+    def forward(self, x, speaker_embed_bc1t=None):
+        """
+        Args:
+            x (Variable): Shape(B, C_in, 1, T), the input of Conv1DGLU
+                layer, where B means batch_size, C_in means the input channels
+                T means input time steps.
+            speaker_embed_bct1 (Variable): Shape(B, C_sp, 1, T), expanded
+                speaker embed, where C_sp means speaker embedding size. Note
+                that when using residual connection, the Conv1DGLU does not
+                change the number of channels, so out channels equals input
+                channels.
+
+        Returns:
+            x (Variable): Shape(B, C_out, 1, T), the output of Conv1DGLU, where
+                C_out means the output channels of Conv1DGLU.
+        """
+
+        residual = x
+        x = fluid.layers.dropout(x, self.dropout)
+        x = self.conv(x)
+
+        content, gate = fluid.layers.split(x, num_or_sections=2, dim=1)
+
+        if speaker_embed_bc1t is not None:
+            sp = self.fc(speaker_embed_bc1t)
+            content = content + sp
+
+        # glu
+        x = fluid.layers.elementwise_mul(fluid.layers.sigmoid(gate), content)
+
+        if self.residual:
+            x = fluid.layers.scale(x + residual, np.sqrt(0.5))
+        return x
+
+    def add_input(self, x, speaker_embed_bc11=None):
+        """
+        Inputs:
+        x: shape(B, num_filters, 1, time_steps)
+        speaker_embed_bc11: shape(B, speaker_dim, 1, time_steps)
+
+        Outputs:
+        out: shape(B, num_filters, 1, time_steps), where time_steps = 1
+        """
+
+        residual = x
+
+        # add step input and produce step output
+        x = fluid.layers.dropout(x, self.dropout)
+        x = self.conv.add_input(x)
+
+        content, gate = fluid.layers.split(x, num_or_sections=2, dim=1)
+
+        if speaker_embed_bc11 is not None:
+            sp = self.fc(speaker_embed_bc11)
+            content = content + sp
+
+        x = fluid.layers.elementwise_mul(fluid.layers.sigmoid(gate), content)
+
+        if self.residual:
+            x = fluid.layers.scale(x + residual, np.sqrt(0.5))
+        return x
+
+
+def Conv1DTranspose(name_scope,
+                    in_channels,
+                    num_filters,
+                    filter_size,
+                    padding=0,
+                    stride=1,
+                    dilation=1,
+                    groups=None,
+                    std_mul=1.0,
+                    dropout=0.0,
+                    use_cudnn=True,
+                    act=None,
+                    dtype="float32"):
+    std = np.sqrt(std_mul * (1 - dropout) / (in_channels * filter_size))
+    weight_init = fluid.initializer.NormalInitializer(scale=std)
+    weight_attr = fluid.ParamAttr(initializer=weight_init)
+    bias_init = fluid.initializer.ConstantInitializer(0.0)
+    bias_attr = fluid.ParamAttr(initializer=bias_init)
+    layer = conv.Conv1DTranspose(
+        name_scope,
+        in_channels,
+        num_filters,
+        filter_size,
+        padding=padding,
+        stride=stride,
+        dilation=dilation,
+        groups=groups,
+        param_attr=weight_attr,
+        bias_attr=bias_attr,
+        use_cudnn=use_cudnn,
+        act=act,
+        dtype=dtype)
+    return layer
+
+
+def compute_position_embedding(rad):
+    # rad is a transposed radius, shape(embed_dim, n_vocab)
+    embed_dim, n_vocab = rad.shape
+
+    even_dims = dg.to_variable(np.arange(0, embed_dim, 2).astype("int32"))
+    odd_dims = dg.to_variable(np.arange(1, embed_dim, 2).astype("int32"))
+
+    even_rads = fluid.layers.gather(rad, even_dims)
+    odd_rads = fluid.layers.gather(rad, odd_dims)
+
+    sines = fluid.layers.sin(even_rads)
+    cosines = fluid.layers.cos(odd_rads)
+
+    temp = fluid.layers.scatter(rad, even_dims, sines)
+    out = fluid.layers.scatter(temp, odd_dims, cosines)
+    out = fluid.layers.transpose(out, perm=[1, 0])
+    return out
+
+
+def position_encoding_init(n_position,
+                           d_pos_vec,
+                           position_rate=1.0,
+                           sinusoidal=True):
+    """ Init the sinusoid position encoding table """
+
+    # keep idx 0 for padding token position encoding zero vector
+    position_enc = np.array([[
+        position_rate * pos / np.power(10000, 2 * (i // 2) / d_pos_vec)
+        for i in range(d_pos_vec)
+    ] if pos != 0 else np.zeros(d_pos_vec) for pos in range(n_position)])
+
+    if sinusoidal:
+        position_enc[1:, 0::2] = np.sin(position_enc[1:, 0::2])  # dim 2i
+        position_enc[1:, 1::2] = np.cos(position_enc[1:, 1::2])  # dim 2i+1
+
+    return position_enc
+
+
+class PositionEmbedding(dg.Layer):
+    def __init__(self,
+                 name_scope,
+                 n_position,
+                 d_pos_vec,
+                 position_rate=1.0,
+                 is_sparse=False,
+                 is_distributed=False,
+                 param_attr=None,
+                 max_norm=None,
+                 padding_idx=None,
+                 dtype="float32"):
+        super(PositionEmbedding, self).__init__(name_scope, dtype=dtype)
+        self.embed = dg.Embedding(
+            self.full_name(),
+            size=(n_position, d_pos_vec),
+            is_sparse=is_sparse,
+            is_distributed=is_distributed,
+            padding_idx=None,
+            param_attr=param_attr,
+            dtype=dtype)
+        self.set_weight(
+            position_encoding_init(
+                n_position,
+                d_pos_vec,
+                position_rate=position_rate,
+                sinusoidal=False).astype(dtype))
+
+        self._is_sparse = is_sparse
+        self._is_distributed = is_distributed
+        self._remote_prefetch = self._is_sparse and (not self._is_distributed)
+        if self._remote_prefetch:
+            assert self._is_sparse is True and self._is_distributed is False
+
+        self._padding_idx = (-1 if padding_idx is None else padding_idx if
+                             padding_idx >= 0 else (n_position + padding_idx))
+        self._position_rate = position_rate
+        self._max_norm = max_norm
+        self._dtype = dtype
+
+    def set_weight(self, array):
+        assert self.embed._w.shape == list(array.shape), "shape does not match"
+        self.embed._w._ivar.value().get_tensor().set(
+            array, fluid.framework._current_expected_place())
+
+    def forward(self, indices, speaker_position_rate=None):
+        """
+        Args:
+            indices (Variable): Shape (B, T, 1), dtype: int64, position
+                indices, where B means the batch size, T means the time steps.
+            speaker_position_rate (Variable | float, optional), position
+                rate. It can be a float point number or a Variable with 
+                shape (1,), then this speaker_position_rate is used for every 
+                example. It can also be a Variable with shape (B, 1), which 
+                contains a speaker position rate for each speaker.
+        Returns:
+            out (Variable): Shape(B, C_pos), position embedding, where C_pos 
+                means position embedding size.
+        """
+        rad = fluid.layers.transpose(self.embed._w, perm=[1, 0])
+        batch_size = indices.shape[0]
+
+        if speaker_position_rate is None:
+            weight = compute_position_embedding(rad)
+            out = self._helper.create_variable_for_type_inference(self._dtype)
+            self._helper.append_op(
+                type="lookup_table",
+                inputs={"Ids": indices,
+                        "W": weight},
+                outputs={"Out": out},
+                attrs={
+                    "is_sparse": self._is_sparse,
+                    "is_distributed": self._is_distributed,
+                    "remote_prefetch": self._remote_prefetch,
+                    "padding_idx":
+                    self._padding_idx,  # special value for lookup table op
+                })
+            return out
+
+        elif (np.isscalar(speaker_position_rate) or
+              isinstance(speaker_position_rate, fluid.framework.Variable) and
+              speaker_position_rate.shape == [1, 1]):
+            # # make a weight
+            # scale the weight (the operand for sin & cos)
+            if np.isscalar(speaker_position_rate):
+                scaled_rad = fluid.layers.scale(rad, speaker_position_rate)
+            else:
+                scaled_rad = fluid.layers.elementwise_mul(
+                    rad, speaker_position_rate[0])
+            weight = compute_position_embedding(scaled_rad)
+            out = self._helper.create_variable_for_type_inference(self._dtype)
+            self._helper.append_op(
+                type="lookup_table",
+                inputs={"Ids": indices,
+                        "W": weight},
+                outputs={"Out": out},
+                attrs={
+                    "is_sparse": self._is_sparse,
+                    "is_distributed": self._is_distributed,
+                    "remote_prefetch": self._remote_prefetch,
+                    "padding_idx":
+                    self._padding_idx,  # special value for lookup table op
+                })
+            return out
+
+        elif np.prod(speaker_position_rate.shape) > 1:
+            assert speaker_position_rate.shape == [batch_size, 1]
+            outputs = []
+            for i in range(batch_size):
+                rate = speaker_position_rate[i]  # rate has shape [1]
+                scaled_rad = fluid.layers.elementwise_mul(rad, rate)
+                weight = compute_position_embedding(scaled_rad)
+                out = self._helper.create_variable_for_type_inference(
+                    self._dtype)
+                sequence = indices[i]
+                self._helper.append_op(
+                    type="lookup_table",
+                    inputs={"Ids": sequence,
+                            "W": weight},
+                    outputs={"Out": out},
+                    attrs={
+                        "is_sparse": self._is_sparse,
+                        "is_distributed": self._is_distributed,
+                        "remote_prefetch": self._remote_prefetch,
+                        "padding_idx": -1,
+                    })
+                outputs.append(out)
+            out = fluid.layers.stack(outputs)
+            return out
+        else:
+            raise Exception("Then you can just use position rate at init")
+
+
+class Conv1D_GU(dg.Layer):
+    def __init__(self,
+                 name_scope,
+                 conditioner_dim,
+                 in_channels,
+                 num_filters,
+                 filter_size,
+                 dilation,
+                 causal=False,
+                 residual=True,
+                 dtype="float32"):
+        super(Conv1D_GU, self).__init__(name_scope, dtype=dtype)
+
+        self.conditioner_dim = conditioner_dim
+        self.in_channels = in_channels
+        self.num_filters = num_filters
+        self.filter_size = filter_size
+        self.dilation = dilation
+        self.causal = causal
+        self.residual = residual
+
+        if residual:
+            assert (
+                in_channels == num_filters
+            ), "this block uses residual connection"\
+                "the input_channels should equals num_filters"
+
+        self.conv = Conv1D(
+            self.full_name(),
+            in_channels,
+            2 * num_filters,
+            filter_size,
+            dilation,
+            causal=causal,
+            dtype=dtype)
+
+        self.fc = Conv1D(
+            self.full_name(),
+            conditioner_dim,
+            2 * num_filters,
+            filter_size=1,
+            dilation=1,
+            causal=False,
+            dtype=dtype)
+
+    def forward(self, x, skip=None, conditioner=None):
+        """
+        Args:
+            x (Variable): Shape(B, C_in, 1, T), the input of Conv1D_GU
+                layer, where B means batch_size, C_in means the input channels
+                T means input time steps.
+            skip (Variable): Shape(B, C_in, 1, T), skip connection.
+            conditioner (Variable): Shape(B, C_con, 1, T), expanded mel
+                conditioner, where C_con is conditioner hidden dim which
+                equals the num of mel bands. Note that when using residual
+                connection, the Conv1D_GU does not change the number of
+                channels, so out channels equals input channels.
+        Returns:
+            x (Variable): Shape(B, C_out, 1, T), the output of Conv1D_GU, where
+                C_out means the output channels of Conv1D_GU.
+            skip (Variable): Shape(B, C_out, 1, T), skip connection.
+        """
+        residual = x
+        x = self.conv(x)
+
+        if conditioner is not None:
+            cond_bias = self.fc(conditioner)
+            x += cond_bias
+
+        content, gate = fluid.layers.split(x, num_or_sections=2, dim=1)
+
+        # Gated Unit.
+        x = fluid.layers.elementwise_mul(
+            fluid.layers.sigmoid(gate), fluid.layers.tanh(content))
+
+        if skip is None:
+            skip = x
+        else:
+            skip = fluid.layers.scale(skip + x, np.sqrt(0.5))
+
+        if self.residual:
+            x = fluid.layers.scale(residual + x, np.sqrt(0.5))
+
+        return x, skip
+
+    def add_input(self, x, skip=None, conditioner=None):
+        """
+        Inputs:
+            x: shape(B, num_filters, 1, time_steps)
+            skip: shape(B, num_filters, 1, time_steps), skip connection
+            conditioner: shape(B, conditioner_dim, 1, time_steps)
+        Outputs:
+            x: shape(B, num_filters, 1, time_steps), where time_steps = 1
+            skip: skip connection, same shape as x
+        """
+        residual = x
+
+        # add step input and produce step output
+        x = self.conv.add_input(x)
+
+        if conditioner is not None:
+            cond_bias = self.fc(conditioner)
+            x += cond_bias
+
+        content, gate = fluid.layers.split(x, num_or_sections=2, dim=1)
+
+        # Gated Unit.
+        x = fluid.layers.elementwise_mul(
+            fluid.layers.sigmoid(gate), fluid.layers.tanh(content))
+
+        if skip is None:
+            skip = x
+        else:
+            skip = fluid.layers.scale(skip + x, np.sqrt(0.5))
+
+        if self.residual:
+            x = fluid.layers.scale(residual + x, np.sqrt(0.5))
+
+        return x, skip
+
+
+def Conv2DTranspose(name_scope,
+                    num_filters,
+                    filter_size,
+                    padding=0,
+                    stride=1,
+                    dilation=1,
+                    use_cudnn=True,
+                    act=None,
+                    dtype="float32"):
+    val = 1.0 / (filter_size[0] * filter_size[1])
+    weight_init = fluid.initializer.ConstantInitializer(val)
+    weight_attr = fluid.ParamAttr(initializer=weight_init)
+
+    layer = weight_norm.Conv2DTranspose(
+        name_scope,
+        num_filters,
+        filter_size=filter_size,
+        padding=padding,
+        stride=stride,
+        dilation=dilation,
+        param_attr=weight_attr,
+        use_cudnn=use_cudnn,
+        act=act,
+        dtype=dtype)
+
+    return layer

parakeet/modules/multihead_attention.py

@@ -78,17 +78,15 @@ class ScaledDotProductAttention(dg.Layer):
         """
         # Compute attention score
         attention = layers.matmul(
-            query, key, transpose_y=True)  #transpose the last dim in y
-        attention = attention / math.sqrt(self.d_key)
+            query, key, transpose_y=True, alpha=self.d_key
+            **-0.5)  #transpose the last dim in y
 
         # Mask key to ignore padding
         if mask is not None:
-            attention = attention * mask
-            mask = (mask == 0).astype(np.float32) * (-2**32 + 1)
             attention = attention + mask
-
         attention = layers.softmax(attention)
-        attention = layers.dropout(attention, dropout)
+        attention = layers.dropout(
+            attention, dropout, dropout_implementation='upscale_in_train')
 
         # Mask query to ignore padding
         if query_mask is not None:
@@ -142,17 +140,11 @@ class MultiheadAttention(dg.Layer):
             result (Variable), Shape(B, T, C), the result of mutihead attention.
             attention (Variable), Shape(n_head * B, T, C), the attention of key.
         """
+
         batch_size = key.shape[0]
         seq_len_key = key.shape[1]
         seq_len_query = query_input.shape[1]
 
-        # repeat masks h times
-        if query_mask is not None:
-            query_mask = layers.expand(query_mask,
-                                       [self.num_head, 1, seq_len_key])
-        if mask is not None:
-            mask = layers.expand(mask, (self.num_head, 1, 1))
-
         # Make multihead attention
         # key & value.shape = (batch_size, seq_len, feature)(feature = num_head * num_hidden_per_attn)
         key = layers.reshape(
@@ -176,6 +168,18 @@ class MultiheadAttention(dg.Layer):
         result, attention = self.scal_attn(
             key, value, query, mask=mask, query_mask=query_mask)
 
+        key = layers.reshape(
+            layers.transpose(key, [2, 0, 1, 3]), [-1, seq_len_key, self.d_k])
+        value = layers.reshape(
+            layers.transpose(value, [2, 0, 1, 3]),
+            [-1, seq_len_key, self.d_k])
+        query = layers.reshape(
+            layers.transpose(query, [2, 0, 1, 3]),
+            [-1, seq_len_query, self.d_q])
+
+        result, attention = self.scal_attn(
+            key, value, query, mask=mask, query_mask=query_mask)
+
         # concat all multihead result
         result = layers.reshape(
             result, [self.num_head, batch_size, seq_len_query, self.d_q])
@@ -184,7 +188,10 @@ class MultiheadAttention(dg.Layer):
             [batch_size, seq_len_query, -1])
         if self.is_concat:
             result = layers.concat([query_input, result], axis=-1)
-        result = layers.dropout(self.fc(result), self.dropout)
+        result = layers.dropout(
+            self.fc(result),
+            self.dropout,
+            dropout_implementation='upscale_in_train')
         result = result + query_input
 
         result = self.layer_norm(result)