import torch from torch.nn import functional as F from utils.hparams import hparams from utils.pitch_utils import f0_to_coarse, denorm_f0 class Batch2Loss: ''' pipeline: batch -> insert1 -> module1 -> insert2 -> module2 -> insert3 -> module3 -> insert4 -> module4 -> loss ''' @staticmethod def insert1(pitch_midi, midi_dur, is_slur, # variables midi_embed, midi_dur_layer, is_slur_embed): # modules ''' add embeddings for midi, midi_dur, slur ''' midi_embedding = midi_embed(pitch_midi) midi_dur_embedding, slur_embedding = 0, 0 if midi_dur is not None: midi_dur_embedding = midi_dur_layer(midi_dur[:, :, None]) # [B, T, 1] -> [B, T, H] if is_slur is not None: slur_embedding = is_slur_embed(is_slur) return midi_embedding, midi_dur_embedding, slur_embedding @staticmethod def module1(fs2_encoder, # modules txt_tokens, midi_embedding, midi_dur_embedding, slur_embedding): # variables ''' get *encoder_out* == fs2_encoder(*txt_tokens*, some embeddings) ''' encoder_out = fs2_encoder(txt_tokens, midi_embedding, midi_dur_embedding, slur_embedding) return encoder_out @staticmethod def insert2(encoder_out, spk_embed_id, spk_embed_dur_id, spk_embed_f0_id, src_nonpadding, # variables spk_embed_proj): # modules ''' 1. add embeddings for pspk, spk_dur, sk_f0 2. get *dur_inp* ~= *encoder_out* + *spk_embed_dur* ''' # add ref style embed # Not implemented # variance encoder var_embed = 0 # encoder_out_dur denotes encoder outputs for duration predictor # in speech adaptation, duration predictor use old speaker embedding if hparams['use_spk_id']: spk_embed = spk_embed_proj(spk_embed_id)[:, None, :] spk_embed_dur = spk_embed_f0 = spk_embed else: spk_embed_dur = spk_embed_f0 = spk_embed = 0 # add dur dur_inp = (encoder_out + var_embed + spk_embed_dur) * src_nonpadding return var_embed, spk_embed, spk_embed_dur, spk_embed_f0, dur_inp @staticmethod def module2(dur_predictor, length_regulator, # modules dur_input, mel2ph, txt_tokens, all_vowel_tokens, ret, midi_dur=None): # variables ''' 1. get *dur* ~= dur_predictor(*dur_inp*) 2. (mel2ph is None): get *mel2ph* ~= length_regulater(*dur*) ''' src_padding = (txt_tokens == 0) dur_input = dur_input.detach() + hparams['predictor_grad'] * (dur_input - dur_input.detach()) if mel2ph is None: dur, xs = dur_predictor.inference(dur_input, src_padding) ret['dur'] = xs dur = xs.squeeze(-1).exp() - 1.0 for i in range(len(dur)): for j in range(len(dur[i])): if txt_tokens[i, j] in all_vowel_tokens: if j < len(dur[i]) - 1 and txt_tokens[i, j + 1] not in all_vowel_tokens: dur[i, j] = midi_dur[i, j] - dur[i, j + 1] if dur[i, j] < 0: dur[i, j] = 0 dur[i, j + 1] = midi_dur[i, j] else: dur[i, j] = midi_dur[i, j] dur[:, 0] = dur[:, 0] + 0.5 dur_acc = F.pad(torch.round(torch.cumsum(dur, axis=1)), (1, 0)) dur = torch.clamp(dur_acc[:, 1:] - dur_acc[:, :-1], min=0).long() ret['dur_choice'] = dur mel2ph = length_regulator(dur, src_padding).detach() else: ret['dur'] = dur_predictor(dur_input, src_padding) ret['mel2ph'] = mel2ph return mel2ph @staticmethod def insert3(encoder_out, mel2ph, var_embed, spk_embed_f0, src_nonpadding, tgt_nonpadding): # variables ''' 1. get *decoder_inp* ~= gather *encoder_out* according to *mel2ph* 2. get *pitch_inp* ~= *decoder_inp* + *spk_embed_f0* 3. get *pitch_inp_ph* ~= *encoder_out* + *spk_embed_f0* ''' decoder_inp = F.pad(encoder_out, [0, 0, 1, 0]) mel2ph_ = mel2ph[..., None].repeat([1, 1, encoder_out.shape[-1]]) decoder_inp = decoder_inp_origin = torch.gather(decoder_inp, 1, mel2ph_) # [B, T, H] pitch_inp = (decoder_inp_origin + var_embed + spk_embed_f0) * tgt_nonpadding pitch_inp_ph = (encoder_out + var_embed + spk_embed_f0) * src_nonpadding return decoder_inp, pitch_inp, pitch_inp_ph @staticmethod def module3(pitch_predictor, pitch_embed, energy_predictor, energy_embed, # modules pitch_inp, pitch_inp_ph, f0, uv, energy, mel2ph, is_training, ret): # variables ''' 1. get *ret['pitch_pred']*, *ret['energy_pred']* ~= pitch_predictor(*pitch_inp*), energy_predictor(*pitch_inp*) 2. get *pitch_embedding* ~= pitch_embed(f0_to_coarse(denorm_f0(*f0* or *pitch_pred*)) 3. get *energy_embedding* ~= energy_embed(energy_to_coarse(*energy* or *energy_pred*)) ''' def add_pitch(decoder_inp, f0, uv, mel2ph, ret, encoder_out=None): if hparams['pitch_type'] == 'ph': pitch_pred_inp = encoder_out.detach() + hparams['predictor_grad'] * (encoder_out - encoder_out.detach()) pitch_padding = (encoder_out.sum().abs() == 0) ret['pitch_pred'] = pitch_pred = pitch_predictor(pitch_pred_inp) if f0 is None: f0 = pitch_pred[:, :, 0] ret['f0_denorm'] = f0_denorm = denorm_f0(f0, None, hparams, pitch_padding=pitch_padding) pitch = f0_to_coarse(f0_denorm) # start from 0 [B, T_txt] pitch = F.pad(pitch, [1, 0]) pitch = torch.gather(pitch, 1, mel2ph) # [B, T_mel] pitch_embedding = pitch_embed(pitch) return pitch_embedding decoder_inp = decoder_inp.detach() + hparams['predictor_grad'] * (decoder_inp - decoder_inp.detach()) pitch_padding = (mel2ph == 0) if hparams['pitch_ar']: ret['pitch_pred'] = pitch_pred = pitch_predictor(decoder_inp, f0 if is_training else None) if f0 is None: f0 = pitch_pred[:, :, 0] else: ret['pitch_pred'] = pitch_pred = pitch_predictor(decoder_inp) if f0 is None: f0 = pitch_pred[:, :, 0] if hparams['use_uv'] and uv is None: uv = pitch_pred[:, :, 1] > 0 ret['f0_denorm'] = f0_denorm = denorm_f0(f0, uv, hparams, pitch_padding=pitch_padding) if pitch_padding is not None: f0[pitch_padding] = 0 pitch = f0_to_coarse(f0_denorm) # start from 0 pitch_embedding = pitch_embed(pitch) return pitch_embedding def add_energy(decoder_inp, energy, ret): decoder_inp = decoder_inp.detach() + hparams['predictor_grad'] * (decoder_inp - decoder_inp.detach()) ret['energy_pred'] = energy_pred = energy_predictor(decoder_inp)[:, :, 0] if energy is None: energy = energy_pred energy = torch.clamp(energy * 256 // 4, max=255).long() # energy_to_coarse energy_embedding = energy_embed(energy) return energy_embedding # add pitch and energy embed nframes = mel2ph.size(1) pitch_embedding = 0 if hparams['use_pitch_embed']: if f0 is not None: delta_l = nframes - f0.size(1) if delta_l > 0: f0 = torch.cat((f0, torch.FloatTensor([[x[-1]] * delta_l for x in f0]).to(f0.device)), 1) f0 = f0[:, :nframes] if uv is not None: delta_l = nframes - uv.size(1) if delta_l > 0: uv = torch.cat((uv, torch.FloatTensor([[x[-1]] * delta_l for x in uv]).to(uv.device)), 1) uv = uv[:, :nframes] pitch_embedding = add_pitch(pitch_inp, f0, uv, mel2ph, ret, encoder_out=pitch_inp_ph) energy_embedding = 0 if hparams['use_energy_embed']: if energy is not None: delta_l = nframes - energy.size(1) if delta_l > 0: energy = torch.cat( (energy, torch.FloatTensor([[x[-1]] * delta_l for x in energy]).to(energy.device)), 1) energy = energy[:, :nframes] energy_embedding = add_energy(pitch_inp, energy, ret) return pitch_embedding, energy_embedding @staticmethod def insert4(decoder_inp, pitch_embedding, energy_embedding, spk_embed, ret, tgt_nonpadding): ''' *decoder_inp* ~= *decoder_inp* + embeddings for spk, pitch, energy ''' ret['decoder_inp'] = decoder_inp = ( decoder_inp + pitch_embedding + energy_embedding + spk_embed) * tgt_nonpadding return decoder_inp @staticmethod def module4(diff_main_loss, # modules norm_spec, decoder_inp_t, ret, K_step, batch_size, device): # variables ''' training diffusion using spec as input and decoder_inp as condition. Args: norm_spec: (normalized) spec decoder_inp_t: (transposed) decoder_inp Returns: ret['diff_loss'] ''' t = torch.randint(0, K_step, (batch_size,), device=device).long() norm_spec = norm_spec.transpose(1, 2)[:, None, :, :] # [B, 1, M, T] ret['diff_loss'] = diff_main_loss(norm_spec, t, cond=decoder_inp_t) # nonpadding = (mel2ph != 0).float() # ret['diff_loss'] = self.p_losses(x, t, cond, nonpadding=nonpadding)