| | |
|---|
| | |
|
|---|
| | | return acoustic_embeds, token_num, alphas, cif_peak
|
|---|
| | |
|
|---|
| | | def forward_chunk(self, hidden, cache=None):
|
|---|
| | | b, t, d = hidden.size()
|
|---|
| | | h = hidden
|
|---|
| | | context = h.transpose(1, 2)
|
|---|
| | | queries = self.pad(context)
|
|---|
| | | output = torch.relu(self.cif_conv1d(queries))
|
|---|
| | | output = output.transpose(1, 2)
|
|---|
| | | output = self.cif_output(output)
|
|---|
| | | alphas = torch.sigmoid(output)
|
|---|
| | | alphas = torch.nn.functional.relu(alphas * self.smooth_factor - self.noise_threshold)
|
|---|
| | |
|
|---|
| | | alphas = alphas.squeeze(-1)
|
|---|
| | | mask_chunk_predictor = None
|
|---|
| | | if cache is not None:
|
|---|
| | | mask_chunk_predictor = None
|
|---|
| | | mask_chunk_predictor = torch.zeros_like(alphas)
|
|---|
| | | mask_chunk_predictor[:, cache["pad_left"]:cache["stride"] + cache["pad_left"]] = 1.0
|
|---|
| | | |
|---|
| | | if mask_chunk_predictor is not None:
|
|---|
| | | alphas = alphas * mask_chunk_predictor
|
|---|
| | | |
|---|
| | | if cache is not None:
|
|---|
| | | if cache["is_final"]:
|
|---|
| | | alphas[:, cache["stride"] + cache["pad_left"] - 1] += 0.45
|
|---|
| | | if cache["cif_hidden"] is not None:
|
|---|
| | | hidden = torch.cat((cache["cif_hidden"], hidden), 1)
|
|---|
| | | if cache["cif_alphas"] is not None:
|
|---|
| | | alphas = torch.cat((cache["cif_alphas"], alphas), -1)
|
|---|
| | |
|
|---|
| | | token_num = alphas.sum(-1)
|
|---|
| | | acoustic_embeds, cif_peak = cif(hidden, alphas, self.threshold)
|
|---|
| | | len_time = alphas.size(-1)
|
|---|
| | | last_fire_place = len_time - 1
|
|---|
| | | last_fire_remainds = 0.0
|
|---|
| | | pre_alphas_length = 0
|
|---|
| | | |
|---|
| | | mask_chunk_peak_predictor = None
|
|---|
| | | if cache is not None:
|
|---|
| | | mask_chunk_peak_predictor = None
|
|---|
| | | mask_chunk_peak_predictor = torch.zeros_like(cif_peak)
|
|---|
| | | if cache["cif_alphas"] is not None:
|
|---|
| | | pre_alphas_length = cache["cif_alphas"].size(-1)
|
|---|
| | | mask_chunk_peak_predictor[:, :pre_alphas_length] = 1.0
|
|---|
| | | mask_chunk_peak_predictor[:, pre_alphas_length + cache["pad_left"]:pre_alphas_length + cache["stride"] + cache["pad_left"]] = 1.0
|
|---|
| | | |
|---|
| | | if mask_chunk_peak_predictor is not None:
|
|---|
| | | cif_peak = cif_peak * mask_chunk_peak_predictor.squeeze(-1)
|
|---|
| | | |
|---|
| | | for i in range(len_time):
|
|---|
| | | if cif_peak[0][len_time - 1 - i] > self.threshold or cif_peak[0][len_time - 1 - i] == self.threshold:
|
|---|
| | | last_fire_place = len_time - 1 - i
|
|---|
| | | last_fire_remainds = cif_peak[0][len_time - 1 - i] - self.threshold
|
|---|
| | | break
|
|---|
| | | last_fire_remainds = torch.tensor([last_fire_remainds], dtype=alphas.dtype).to(alphas.device)
|
|---|
| | | cache["cif_hidden"] = hidden[:, last_fire_place:, :]
|
|---|
| | | cache["cif_alphas"] = torch.cat((last_fire_remainds.unsqueeze(0), alphas[:, last_fire_place+1:]), -1)
|
|---|
| | | token_num_int = token_num.floor().type(torch.int32).item()
|
|---|
| | | return acoustic_embeds[:, 0:token_num_int, :], token_num, alphas, cif_peak
|
|---|
| | |
|
|---|
| | | def tail_process_fn(self, hidden, alphas, token_num=None, mask=None):
|
|---|
| | | b, t, d = hidden.size()
|
|---|
| | | tail_threshold = self.tail_threshold
|
|---|
