def main( config: str = DEFAULT_YAML, h5: str = None, subwords: bool = False, sentence_piece: bool = False, output: str = None, ): assert h5 and output tf.keras.backend.clear_session() tf.compat.v1.enable_control_flow_v2() config = Config(config) speech_featurizer, text_featurizer = featurizer_helpers.prepare_featurizers( config=config, subwords=subwords, sentence_piece=sentence_piece, ) rnn_transducer = RnnTransducer(**config.model_config, vocabulary_size=text_featurizer.num_classes) rnn_transducer.make(speech_featurizer.shape) rnn_transducer.load_weights(h5, by_name=True) rnn_transducer.summary(line_length=100) rnn_transducer.add_featurizers(speech_featurizer, text_featurizer) exec_helpers.convert_tflite(model=rnn_transducer, output=output)
def main( config: str = DEFAULT_YAML, saved: str = None, mxp: bool = False, bs: int = None, sentence_piece: bool = False, subwords: bool = False, device: int = 0, cpu: bool = False, output: str = "test.tsv", ): assert saved and output tf.random.set_seed(0) tf.keras.backend.clear_session() tf.config.optimizer.set_experimental_options({"auto_mixed_precision": mxp}) env_util.setup_devices([device], cpu=cpu) config = Config(config) speech_featurizer, text_featurizer = featurizer_helpers.prepare_featurizers( config=config, subwords=subwords, sentence_piece=sentence_piece, ) rnn_transducer = RnnTransducer(**config.model_config, vocabulary_size=text_featurizer.num_classes) rnn_transducer.make(speech_featurizer.shape) rnn_transducer.load_weights(saved, by_name=True) rnn_transducer.summary(line_length=100) rnn_transducer.add_featurizers(speech_featurizer, text_featurizer) test_dataset = dataset_helpers.prepare_testing_datasets( config=config, speech_featurizer=speech_featurizer, text_featurizer=text_featurizer) batch_size = bs or config.learning_config.running_config.batch_size test_data_loader = test_dataset.create(batch_size) exec_helpers.run_testing(model=rnn_transducer, test_dataset=test_dataset, test_data_loader=test_data_loader, output=output)
speech_featurizer = TFSpeechFeaturizer(config.speech_config) if args.sentence_piece: logger.info("Loading SentencePiece model ...") text_featurizer = SentencePieceFeaturizer(config.decoder_config) elif args.subwords: logger.info("Loading subwords ...") text_featurizer = SubwordFeaturizer(config.decoder_config) else: text_featurizer = CharFeaturizer(config.decoder_config) text_featurizer.decoder_config.beam_width = args.beam_width # build model rnnt = RnnTransducer(**config.model_config, vocabulary_size=text_featurizer.num_classes) rnnt.make(speech_featurizer.shape) rnnt.load_weights(args.saved, by_name=True, skip_mismatch=True) rnnt.summary(line_length=120) rnnt.add_featurizers(speech_featurizer, text_featurizer) signal = read_raw_audio(args.filename) features = speech_featurizer.tf_extract(signal) input_length = math_util.get_reduced_length(tf.shape(features)[0], rnnt.time_reduction_factor) if args.beam_width: transcript = rnnt.recognize_beam( data_util.create_inputs( inputs=features[None, ...], inputs_length=input_length[None, ...] ) ) logger.info("Transcript:", transcript[0].numpy().decode("UTF-8")) elif args.timestamp:
logger.info("Use characters ...") text_featurizer = CharFeaturizer(config.decoder_config) tf.random.set_seed(0) test_dataset = ASRSliceDataset(speech_featurizer=speech_featurizer, text_featurizer=text_featurizer, **vars( config.learning_config.test_dataset_config)) # build model rnn_transducer = RnnTransducer(**config.model_config, vocabulary_size=text_featurizer.num_classes) rnn_transducer.make(speech_featurizer.shape) rnn_transducer.load_weights(args.saved, by_name=True) rnn_transducer.summary(line_length=100) rnn_transducer.add_featurizers(speech_featurizer, text_featurizer) batch_size = args.bs or config.learning_config.running_config.batch_size test_data_loader = test_dataset.create(batch_size) with file_util.save_file(file_util.preprocess_paths(args.output)) as filepath: overwrite = True if tf.io.gfile.exists(filepath): overwrite = input( f"Overwrite existing result file {filepath} ? (y/n): ").lower( ) == "y" if overwrite: results = rnn_transducer.predict(test_data_loader, verbose=1) logger.info(f"Saving result to {args.output} ...") with open(filepath, "w") as openfile:
def test_streaming_transducer(): config = Config(DEFAULT_YAML) text_featurizer = CharFeaturizer(config.decoder_config) speech_featurizer = TFSpeechFeaturizer(config.speech_config) model = RnnTransducer(vocabulary_size=text_featurizer.num_classes, **config.model_config) model.make(speech_featurizer.shape) model.summary(line_length=150) model.add_featurizers(speech_featurizer=speech_featurizer, text_featurizer=text_featurizer) concrete_func = model.make_tflite_function( timestamp=False).get_concrete_function() converter = tf.lite.TFLiteConverter.from_concrete_functions( [concrete_func]) converter.optimizations = [tf.lite.Optimize.DEFAULT] converter.experimental_new_converter = True converter.target_spec.supported_ops = [ tf.lite.OpsSet.TFLITE_BUILTINS, tf.lite.OpsSet.SELECT_TF_OPS ] tflite_model = converter.convert() print("Converted successfully with no timestamp") concrete_func = model.make_tflite_function( timestamp=True).get_concrete_function() converter = tf.lite.TFLiteConverter.from_concrete_functions( [concrete_func]) converter.optimizations = [tf.lite.Optimize.DEFAULT] converter.experimental_new_converter = True converter.target_spec.supported_ops = [ tf.lite.OpsSet.TFLITE_BUILTINS, tf.lite.OpsSet.SELECT_TF_OPS ] converter.convert() print("Converted successfully with timestamp") tflitemodel = tf.lite.Interpreter(model_content=tflite_model) signal = tf.random.normal([4000]) input_details = tflitemodel.get_input_details() output_details = tflitemodel.get_output_details() tflitemodel.resize_tensor_input(input_details[0]["index"], signal.shape) tflitemodel.allocate_tensors() tflitemodel.set_tensor(input_details[0]["index"], signal) tflitemodel.set_tensor(input_details[1]["index"], tf.constant(text_featurizer.blank, dtype=tf.int32)) tflitemodel.set_tensor( input_details[2]["index"], tf.zeros([ config.model_config["encoder_nlayers"], 2, 1, config.model_config["encoder_rnn_units"] ], dtype=tf.float32)) tflitemodel.set_tensor( input_details[3]["index"], tf.zeros([ config.model_config["prediction_num_rnns"], 2, 1, config.model_config["prediction_rnn_units"] ], dtype=tf.float32)) tflitemodel.invoke() hyp = tflitemodel.get_tensor(output_details[0]["index"]) print(hyp)
def main( config: str = DEFAULT_YAML, tfrecords: bool = False, sentence_piece: bool = False, subwords: bool = True, bs: int = None, spx: int = 1, metadata: str = None, static_length: bool = False, devices: list = [0], mxp: bool = False, pretrained: str = None, ): tf.keras.backend.clear_session() tf.config.optimizer.set_experimental_options({"auto_mixed_precision": mxp}) strategy = env_util.setup_strategy(devices) config = Config(config) speech_featurizer, text_featurizer = featurizer_helpers.prepare_featurizers( config=config, subwords=subwords, sentence_piece=sentence_piece, ) train_dataset, eval_dataset = dataset_helpers.prepare_training_datasets( config=config, speech_featurizer=speech_featurizer, text_featurizer=text_featurizer, tfrecords=tfrecords, metadata=metadata, ) if not static_length: speech_featurizer.reset_length() text_featurizer.reset_length() train_data_loader, eval_data_loader, global_batch_size = dataset_helpers.prepare_training_data_loaders( config=config, train_dataset=train_dataset, eval_dataset=eval_dataset, strategy=strategy, batch_size=bs, ) with strategy.scope(): rnn_transducer = RnnTransducer( **config.model_config, vocabulary_size=text_featurizer.num_classes) rnn_transducer.make(speech_featurizer.shape, prediction_shape=text_featurizer.prepand_shape, batch_size=global_batch_size) if pretrained: rnn_transducer.load_weights(pretrained, by_name=True, skip_mismatch=True) rnn_transducer.summary(line_length=100) rnn_transducer.compile( optimizer=config.learning_config.optimizer_config, experimental_steps_per_execution=spx, global_batch_size=global_batch_size, blank=text_featurizer.blank, ) callbacks = [ tf.keras.callbacks.ModelCheckpoint( **config.learning_config.running_config.checkpoint), tf.keras.callbacks.experimental.BackupAndRestore( config.learning_config.running_config.states_dir), tf.keras.callbacks.TensorBoard( **config.learning_config.running_config.tensorboard), ] rnn_transducer.fit( train_data_loader, epochs=config.learning_config.running_config.num_epochs, validation_data=eval_data_loader, callbacks=callbacks, steps_per_epoch=train_dataset.total_steps, validation_steps=eval_dataset.total_steps if eval_data_loader else None, )