| | |
| | | |
| | | return pre_acoustic_embeds, pre_token_length, pre_alphas, pre_peak_index |
| | | |
| | | def calc_predictor_chunk(self, encoder_out, cache=None): |
| | | def calc_predictor_chunk(self, encoder_out, encoder_out_lens, cache=None): |
| | | |
| | | pre_acoustic_embeds, pre_token_length = \ |
| | | self.predictor.forward_chunk(encoder_out, cache["encoder"]) |
| | |
| | | decoder_out = torch.log_softmax(decoder_out, dim=-1) |
| | | return decoder_out, ys_pad_lens |
| | | |
| | | def cal_decoder_with_predictor_chunk(self, encoder_out, sematic_embeds, cache=None): |
| | | def cal_decoder_with_predictor_chunk(self, encoder_out, encoder_out_lens, sematic_embeds, ys_pad_lens, cache=None): |
| | | decoder_outs = self.decoder.forward_chunk( |
| | | encoder_out, sematic_embeds, cache["decoder"] |
| | | ) |
| | | decoder_out = decoder_outs |
| | | decoder_out = torch.log_softmax(decoder_out, dim=-1) |
| | | return decoder_out |
| | | return decoder_out, ys_pad_lens |
| | | |
| | | def generate(self, |
| | | speech: torch.Tensor, |
| | | speech_lengths: torch.Tensor, |
| | | def init_cache(self, cache: dict = {}, **kwargs): |
| | | chunk_size = kwargs.get("chunk_size", [0, 10, 5]) |
| | | encoder_chunk_look_back = kwargs.get("encoder_chunk_look_back", 0) |
| | | decoder_chunk_look_back = kwargs.get("decoder_chunk_look_back", 0) |
| | | batch_size = 1 |
| | | |
| | | enc_output_size = kwargs["encoder_conf"]["output_size"] |
| | | feats_dims = kwargs["frontend_conf"]["n_mels"] * kwargs["frontend_conf"]["lfr_m"] |
| | | cache_encoder = {"start_idx": 0, "cif_hidden": torch.zeros((batch_size, 1, enc_output_size)), |
| | | "cif_alphas": torch.zeros((batch_size, 1)), "chunk_size": chunk_size, |
| | | "encoder_chunk_look_back": encoder_chunk_look_back, "last_chunk": False, "opt": None, |
| | | "feats": torch.zeros((batch_size, chunk_size[0] + chunk_size[2], feats_dims)), |
| | | "tail_chunk": False} |
| | | cache["encoder"] = cache_encoder |
| | | |
| | | cache_decoder = {"decode_fsmn": None, "decoder_chunk_look_back": decoder_chunk_look_back, "opt": None, |
| | | "chunk_size": chunk_size} |
| | | cache["decoder"] = cache_decoder |
| | | cache["frontend"] = {} |
| | | cache["prev_samples"] = [] |
| | | |
| | | return cache |
| | | |
| | | def generate_chunk(self, |
| | | speech, |
| | | speech_lengths=None, |
| | | key: list = None, |
| | | tokenizer=None, |
| | | frontend=None, |
| | | **kwargs, |
| | | ): |
| | | cache = kwargs.get("cache", {}) |
| | | speech.to(device=kwargs["device"]), speech_lengths.to(device=kwargs["device"]) |
| | | |
| | | is_use_ctc = kwargs.get("ctc_weight", 0.0) > 0.00001 and self.ctc != None |
| | | print(is_use_ctc) |
| | | is_use_lm = kwargs.get("lm_weight", 0.0) > 0.00001 and kwargs.get("lm_file", None) is not None |
| | | |
| | | if self.beam_search is None and (is_use_lm or is_use_ctc): |
| | | logging.info("enable beam_search") |
| | | self.init_beam_search(speech, speech_lengths, **kwargs) |
| | | self.nbest = kwargs.get("nbest", 1) |
| | | |
| | | # Forward Encoder |
| | | encoder_out, encoder_out_lens = self.encode(speech, speech_lengths) |
| | | # Encoder |
| | | encoder_out, encoder_out_lens = self.encode_chunk(speech, speech_lengths, cache=cache) |
| | | if isinstance(encoder_out, tuple): |
| | | encoder_out = encoder_out[0] |
| | | |
| | | # predictor |
| | | predictor_outs = self.calc_predictor(encoder_out, encoder_out_lens) |
| | | predictor_outs = self.calc_predictor_chunk(encoder_out, encoder_out_lens, cache=cache) |
| | | pre_acoustic_embeds, pre_token_length, alphas, pre_peak_index = predictor_outs[0], predictor_outs[1], \ |
| | | predictor_outs[2], predictor_outs[3] |
| | | pre_token_length = pre_token_length.round().long() |
| | | if torch.max(pre_token_length) < 1: |
| | | return [] |
| | | decoder_outs = self.cal_decoder_with_predictor(encoder_out, encoder_out_lens, pre_acoustic_embeds, |
| | | pre_token_length) |
| | | decoder_outs = self.cal_decoder_with_predictor_chunk(encoder_out, |
| | | encoder_out_lens, |
| | | pre_acoustic_embeds, |
| | | pre_token_length, |
| | | cache=cache |
| | | ) |
| | | decoder_out, ys_pad_lens = decoder_outs[0], decoder_outs[1] |
| | | |
| | | results = [] |
| | | b, n, d = decoder_out.size() |
| | | if isinstance(key[0], (list, tuple)): |
| | | key = key[0] |
| | | for i in range(b): |
| | | x = encoder_out[i, :encoder_out_lens[i], :] |
| | | am_scores = decoder_out[i, :pre_token_length[i], :] |
| | |
| | | [self.sos] + yseq.tolist() + [self.eos], device=yseq.device |
| | | ) |
| | | nbest_hyps = [Hypothesis(yseq=yseq, score=score)] |
| | | for hyp in nbest_hyps: |
| | | assert isinstance(hyp, (Hypothesis)), type(hyp) |
| | | |
| | | for nbest_idx, hyp in enumerate(nbest_hyps): |
| | | ibest_writer = None |
| | | if ibest_writer is None and kwargs.get("output_dir") is not None: |
| | | writer = DatadirWriter(kwargs.get("output_dir")) |
| | | ibest_writer = writer[f"{nbest_idx + 1}best_recog"] |
| | | # remove sos/eos and get results |
| | | last_pos = -1 |
| | | if isinstance(hyp.yseq, list): |
| | |
| | | token_int = hyp.yseq[1:last_pos].tolist() |
| | | |
| | | # remove blank symbol id, which is assumed to be 0 |
| | | token_int = list(filter(lambda x: x != 0 and x != 2, token_int)) |
| | | token_int = list(filter(lambda x: x != self.eos and x != self.sos and x != self.blank_id, token_int)) |
| | | |
| | | if tokenizer is not None: |
| | | # Change integer-ids to tokens |
| | | token = tokenizer.ids2tokens(token_int) |
| | | text = tokenizer.tokens2text(token) |
| | | |
| | | timestamp = [] |
| | | text_postprocessed, _ = postprocess_utils.sentence_postprocess(token) |
| | | |
| | | results.append((text, token, timestamp)) |
| | | result_i = {"key": key[i], "text": text_postprocessed} |
| | | |
| | | if ibest_writer is not None: |
| | | ibest_writer["token"][key[i]] = " ".join(token) |
| | | # ibest_writer["text"][key[i]] = text |
| | | ibest_writer["text"][key[i]] = text_postprocessed |
| | | else: |
| | | result_i = {"key": key[i], "token_int": token_int} |
| | | results.append(result_i) |
| | | |
| | | return results |
| | | |
| | | def generate(self, |
| | | data_in, |
| | | data_lengths=None, |
| | | key: list = None, |
| | | tokenizer=None, |
| | | frontend=None, |
| | | **kwargs, |
| | | ): |
| | | |
| | | # init beamsearch |
| | | is_use_ctc = kwargs.get("decoding_ctc_weight", 0.0) > 0.00001 and self.ctc != None |
| | | is_use_lm = kwargs.get("lm_weight", 0.0) > 0.00001 and kwargs.get("lm_file", None) is not None |
| | | if self.beam_search is None and (is_use_lm or is_use_ctc): |
| | | logging.info("enable beam_search") |
| | | self.init_beam_search(**kwargs) |
| | | self.nbest = kwargs.get("nbest", 1) |
| | | |
| | | cache = kwargs.get("cache", {}) |
| | | if len(cache) == 0: |
| | | self.init_cache(cache, **kwargs) |
| | | |
| | | meta_data = {} |
| | | chunk_size = kwargs.get("chunk_size", [0, 10, 5]) |
| | | chunk_stride_samples = chunk_size[1] * 960 # 600ms |
| | | |
| | | time1 = time.perf_counter() |
| | | audio_sample_list = load_audio_text_image_video(data_in, fs=frontend.fs, audio_fs=kwargs.get("fs", 16000), |
| | | data_type=kwargs.get("data_type", "sound"), |
| | | tokenizer=tokenizer) |
| | | time2 = time.perf_counter() |
| | | meta_data["load_data"] = f"{time2 - time1:0.3f}" |
| | | assert len(audio_sample_list) == 1, "batch_size must be set 1" |
| | | |
| | | audio_sample = cache["prev_samples"] + audio_sample_list[0] |
| | | |
| | | n = len(audio_sample) // chunk_stride_samples |
| | | m = len(audio_sample) % chunk_stride_samples |
| | | for i in range(n): |
| | | audio_sample_i = audio_sample[i*chunk_stride_samples:(i+1)*chunk_stride_samples] |
| | | |
| | | # extract fbank feats |
| | | speech, speech_lengths = extract_fbank([audio_sample_i], data_type=kwargs.get("data_type", "sound"), |
| | | frontend=frontend, cache=cache["frontend"]) |
| | | time3 = time.perf_counter() |
| | | meta_data["extract_feat"] = f"{time3 - time2:0.3f}" |
| | | meta_data["batch_data_time"] = speech_lengths.sum().item() * frontend.frame_shift * frontend.lfr_n / 1000 |
| | | |
| | | result_i = self.generate_chunk(speech, speech_lengths, **kwargs) |
| | | |
| | | cache["prev_samples"] = audio_sample[:-m] |
| | | |
| | | |