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_embed']:
spk_embed_dur = spk_embed_f0 = spk_embed = spk_embed_proj(spk_embed_id)[:, None, :]
elif hparams['use_spk_id']:
if spk_embed_dur_id is None:
spk_embed_dur_id = spk_embed_id
if spk_embed_f0_id is None:
spk_embed_f0_id = spk_embed_id
spk_embed = spk_embed_proj(spk_embed_id)[:, None, :]
spk_embed_dur = spk_embed_f0 = spk_embed
if hparams['use_split_spk_id']:
spk_embed_dur = spk_embed_dur(spk_embed_dur_id)[:, None, :]
spk_embed_f0 = spk_embed_f0(spk_embed_f0_id)[:, None, :]
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)