# Copyright (c) 2023 Amphion. # # This source code is licensed under the MIT license found in the # LICENSE file in the root directory of this source tree. import torch import torch.nn.functional as F import torch.nn as nn from torch.nn import Conv2d, Conv1d from torch.nn.utils import weight_norm, spectral_norm from torch import nn from modules.vocoder_blocks import * LRELU_SLOPE = 0.1 class DiscriminatorP(torch.nn.Module): def __init__(self, cfg, period, kernel_size=5, stride=3, use_spectral_norm=False): super(DiscriminatorP, self).__init__() self.period = period self.d_mult = cfg.model.mpd.discriminator_channel_mult_factor norm_f = weight_norm if use_spectral_norm == False else spectral_norm self.convs = nn.ModuleList( [ norm_f( Conv2d( 1, int(32 * self.d_mult), (kernel_size, 1), (stride, 1), padding=(get_padding(5, 1), 0), ) ), norm_f( Conv2d( int(32 * self.d_mult), int(128 * self.d_mult), (kernel_size, 1), (stride, 1), padding=(get_padding(5, 1), 0), ) ), norm_f( Conv2d( int(128 * self.d_mult), int(512 * self.d_mult), (kernel_size, 1), (stride, 1), padding=(get_padding(5, 1), 0), ) ), norm_f( Conv2d( int(512 * self.d_mult), int(1024 * self.d_mult), (kernel_size, 1), (stride, 1), padding=(get_padding(5, 1), 0), ) ), norm_f( Conv2d( int(1024 * self.d_mult), int(1024 * self.d_mult), (kernel_size, 1), (stride, 1), padding=(2, 0), ) ), ] ) self.conv_post = norm_f( Conv2d(int(1024 * self.d_mult), 1, (3, 1), 1, padding=(1, 0)) ) def forward(self, x): fmap = [] # 1d to 2d b, c, t = x.shape if t % self.period != 0: # pad first n_pad = self.period - (t % self.period) x = F.pad(x, (0, n_pad), "reflect") t = t + n_pad x = x.view(b, c, t // self.period, self.period) for l in self.convs: x = l(x) x = F.leaky_relu(x, LRELU_SLOPE) fmap.append(x) x = self.conv_post(x) fmap.append(x) x = torch.flatten(x, 1, -1) return x, fmap class MultiPeriodDiscriminator(torch.nn.Module): def __init__(self, cfg): super(MultiPeriodDiscriminator, self).__init__() self.mpd_reshapes = cfg.model.mpd.mpd_reshapes print("mpd_reshapes: {}".format(self.mpd_reshapes)) discriminators = [ DiscriminatorP(cfg, rs, use_spectral_norm=cfg.model.mpd.use_spectral_norm) for rs in self.mpd_reshapes ] self.discriminators = nn.ModuleList(discriminators) def forward(self, y, y_hat): y_d_rs = [] y_d_gs = [] fmap_rs = [] fmap_gs = [] for i, d in enumerate(self.discriminators): y_d_r, fmap_r = d(y) y_d_g, fmap_g = d(y_hat) y_d_rs.append(y_d_r) fmap_rs.append(fmap_r) y_d_gs.append(y_d_g) fmap_gs.append(fmap_g) return y_d_rs, y_d_gs, fmap_rs, fmap_gs # TODO: merge with DiscriminatorP (lmxue, yicheng) class DiscriminatorP_vits(torch.nn.Module): def __init__(self, period, kernel_size=5, stride=3, use_spectral_norm=False): super(DiscriminatorP_vits, self).__init__() self.period = period self.use_spectral_norm = use_spectral_norm norm_f = weight_norm if use_spectral_norm == False else spectral_norm self.convs = nn.ModuleList( [ norm_f( Conv2d( 1, 32, (kernel_size, 1), (stride, 1), padding=(get_padding(kernel_size, 1), 0), ) ), norm_f( Conv2d( 32, 128, (kernel_size, 1), (stride, 1), padding=(get_padding(kernel_size, 1), 0), ) ), norm_f( Conv2d( 128, 512, (kernel_size, 1), (stride, 1), padding=(get_padding(kernel_size, 1), 0), ) ), norm_f( Conv2d( 512, 1024, (kernel_size, 1), (stride, 1), padding=(get_padding(kernel_size, 1), 0), ) ), norm_f( Conv2d( 1024, 1024, (kernel_size, 1), 1, padding=(get_padding(kernel_size, 1), 0), ) ), ] ) self.conv_post = norm_f(Conv2d(1024, 1, (3, 1), 1, padding=(1, 0))) def forward(self, x): fmap = [] # 1d to 2d b, c, t = x.shape if t % self.period != 0: # pad first n_pad = self.period - (t % self.period) x = F.pad(x, (0, n_pad), "reflect") t = t + n_pad x = x.view(b, c, t // self.period, self.period) for l in self.convs: x = l(x) x = F.leaky_relu(x, LRELU_SLOPE) fmap.append(x) x = self.conv_post(x) fmap.append(x) x = torch.flatten(x, 1, -1) return x, fmap class DiscriminatorS(torch.nn.Module): def __init__(self, use_spectral_norm=False): super(DiscriminatorS, self).__init__() norm_f = weight_norm if use_spectral_norm == False else spectral_norm self.convs = nn.ModuleList( [ norm_f(Conv1d(1, 16, 15, 1, padding=7)), norm_f(Conv1d(16, 64, 41, 4, groups=4, padding=20)), norm_f(Conv1d(64, 256, 41, 4, groups=16, padding=20)), norm_f(Conv1d(256, 1024, 41, 4, groups=64, padding=20)), norm_f(Conv1d(1024, 1024, 41, 4, groups=256, padding=20)), norm_f(Conv1d(1024, 1024, 5, 1, padding=2)), ] ) self.conv_post = norm_f(Conv1d(1024, 1, 3, 1, padding=1)) def forward(self, x): fmap = [] for l in self.convs: x = l(x) x = F.leaky_relu(x, LRELU_SLOPE) fmap.append(x) x = self.conv_post(x) fmap.append(x) x = torch.flatten(x, 1, -1) return x, fmap # TODO: merge with MultiPeriodDiscriminator (lmxue, yicheng) class MultiPeriodDiscriminator_vits(torch.nn.Module): def __init__(self, use_spectral_norm=False): super(MultiPeriodDiscriminator_vits, self).__init__() periods = [2, 3, 5, 7, 11] discs = [DiscriminatorS(use_spectral_norm=use_spectral_norm)] discs = discs + [ DiscriminatorP_vits(i, use_spectral_norm=use_spectral_norm) for i in periods ] self.discriminators = nn.ModuleList(discs) def forward(self, y, y_hat): y_d_rs = [] y_d_gs = [] fmap_rs = [] fmap_gs = [] for i, d in enumerate(self.discriminators): y_d_r, fmap_r = d(y) y_d_g, fmap_g = d(y_hat) y_d_rs.append(y_d_r) y_d_gs.append(y_d_g) fmap_rs.append(fmap_r) fmap_gs.append(fmap_g) outputs = { "y_d_hat_r": y_d_rs, "y_d_hat_g": y_d_gs, "fmap_rs": fmap_rs, "fmap_gs": fmap_gs, } return outputs