rvc/lib/infer_pack/models.py

import math
import torch
from torch import nn
from torch.nn import functional as F
from . import modules
from . import attentions
from . import commons
from .commons import init_weights, get_padding
from torch.nn import Conv1d, ConvTranspose1d, Conv2d
from torch.nn.utils import remove_weight_norm
from torch.nn.utils.parametrizations import spectral_norm, weight_norm
from typing import Optional

has_xpu = bool(hasattr(torch, "xpu") and torch.xpu.is_available())


class TextEncoder256(nn.Module):
    def __init__(
        self,
        out_channels,
        hidden_channels,
        filter_channels,
        n_heads,
        n_layers,
        kernel_size,
        p_dropout,
        f0=True,
    ):
        super(TextEncoder256, self).__init__()
        self.out_channels = out_channels
        self.hidden_channels = hidden_channels
        self.filter_channels = filter_channels
        self.n_heads = n_heads
        self.n_layers = n_layers
        self.kernel_size = kernel_size
        self.p_dropout = float(p_dropout)
        self.emb_phone = nn.Linear(256, hidden_channels)
        self.lrelu = nn.LeakyReLU(0.1, inplace=True)
        if f0 == True:
            self.emb_pitch = nn.Embedding(256, hidden_channels)  # pitch 256
        self.encoder = attentions.Encoder(
            hidden_channels,
            filter_channels,
            n_heads,
            n_layers,
            kernel_size,
            float(p_dropout),
        )
        self.proj = nn.Conv1d(hidden_channels, out_channels * 2, 1)

    def forward(
        self, phone: torch.Tensor, pitch: Optional[torch.Tensor], lengths: torch.Tensor
    ):
        if pitch is None:
            x = self.emb_phone(phone)
        else:
            x = self.emb_phone(phone) + self.emb_pitch(pitch)
        x = x * math.sqrt(self.hidden_channels)  # [b, t, h]
        x = self.lrelu(x)
        x = torch.transpose(x, 1, -1)  # [b, h, t]
        x_mask = torch.unsqueeze(commons.sequence_mask(lengths, x.size(2)), 1).to(
            x.dtype
        )
        x = self.encoder(x * x_mask, x_mask)
        stats = self.proj(x) * x_mask

        m, logs = torch.split(stats, self.out_channels, dim=1)
        return m, logs, x_mask


class TextEncoder768(nn.Module):
    def __init__(
        self,
        out_channels,
        hidden_channels,
        filter_channels,
        n_heads,
        n_layers,
        kernel_size,
        p_dropout,
        f0=True,
    ):
        super(TextEncoder768, self).__init__()
        self.out_channels = out_channels
        self.hidden_channels = hidden_channels
        self.filter_channels = filter_channels
        self.n_heads = n_heads
        self.n_layers = n_layers
        self.kernel_size = kernel_size
        self.p_dropout = float(p_dropout)
        self.emb_phone = nn.Linear(768, hidden_channels)
        self.lrelu = nn.LeakyReLU(0.1, inplace=True)
        if f0 == True:
            self.emb_pitch = nn.Embedding(256, hidden_channels)  # pitch 256
        self.encoder = attentions.Encoder(
            hidden_channels,
            filter_channels,
            n_heads,
            n_layers,
            kernel_size,
            float(p_dropout),
        )
        self.proj = nn.Conv1d(hidden_channels, out_channels * 2, 1)

    def forward(self, phone: torch.Tensor, pitch: torch.Tensor, lengths: torch.Tensor):
        if pitch is None:
            x = self.emb_phone(phone)
        else:
            x = self.emb_phone(phone) + self.emb_pitch(pitch)
        x = x * math.sqrt(self.hidden_channels)  # [b, t, h]
        x = self.lrelu(x)
        x = torch.transpose(x, 1, -1)  # [b, h, t]
        x_mask = torch.unsqueeze(commons.sequence_mask(lengths, x.size(2)), 1).to(
            x.dtype
        )
        x = self.encoder(x * x_mask, x_mask)
        stats = self.proj(x) * x_mask

        m, logs = torch.split(stats, self.out_channels, dim=1)
        return m, logs, x_mask


class ResidualCouplingBlock(nn.Module):
    def __init__(
        self,
        channels,
        hidden_channels,
        kernel_size,
        dilation_rate,
        n_layers,
        n_flows=4,
        gin_channels=0,
    ):
        super(ResidualCouplingBlock, self).__init__()
        self.channels = channels
        self.hidden_channels = hidden_channels
        self.kernel_size = kernel_size
        self.dilation_rate = dilation_rate
        self.n_layers = n_layers
        self.n_flows = n_flows
        self.gin_channels = gin_channels

        self.flows = nn.ModuleList()
        for i in range(n_flows):
            self.flows.append(
                modules.ResidualCouplingLayer(
                    channels,
                    hidden_channels,
                    kernel_size,
                    dilation_rate,
                    n_layers,
                    gin_channels=gin_channels,
                    mean_only=True,
                )
            )
            self.flows.append(modules.Flip())

    def forward(
        self,
        x: torch.Tensor,
        x_mask: torch.Tensor,
        g: Optional[torch.Tensor] = None,
        reverse: bool = False,
    ):
        if not reverse:
            for flow in self.flows:
                x, _ = flow(x, x_mask, g=g, reverse=reverse)
        else:
            for flow in self.flows[::-1]:
                x = flow.forward(x, x_mask, g=g, reverse=reverse)
        return x

    def remove_weight_norm(self):
        for i in range(self.n_flows):
            self.flows[i * 2].remove_weight_norm()

    def __prepare_scriptable__(self):
        for i in range(self.n_flows):
            for hook in self.flows[i * 2]._forward_pre_hooks.values():
                if (
                    hook.__module__ == "torch.nn.utils.weight_norm"
                    and hook.__class__.__name__ == "WeightNorm"
                ):
                    torch.nn.utils.remove_weight_norm(self.flows[i * 2])

        return self


class PosteriorEncoder(nn.Module):
    def __init__(
        self,
        in_channels,
        out_channels,
        hidden_channels,
        kernel_size,
        dilation_rate,
        n_layers,
        gin_channels=0,
    ):
        super(PosteriorEncoder, self).__init__()
        self.in_channels = in_channels
        self.out_channels = out_channels
        self.hidden_channels = hidden_channels
        self.kernel_size = kernel_size
        self.dilation_rate = dilation_rate
        self.n_layers = n_layers
        self.gin_channels = gin_channels

        self.pre = nn.Conv1d(in_channels, hidden_channels, 1)
        self.enc = modules.WN(
            hidden_channels,
            kernel_size,
            dilation_rate,
            n_layers,
            gin_channels=gin_channels,
        )
        self.proj = nn.Conv1d(hidden_channels, out_channels * 2, 1)

    def forward(
        self, x: torch.Tensor, x_lengths: torch.Tensor, g: Optional[torch.Tensor] = None
    ):
        x_mask = torch.unsqueeze(commons.sequence_mask(x_lengths, x.size(2)), 1).to(
            x.dtype
        )
        x = self.pre(x) * x_mask
        x = self.enc(x, x_mask, g=g)
        stats = self.proj(x) * x_mask
        m, logs = torch.split(stats, self.out_channels, dim=1)
        z = (m + torch.randn_like(m) * torch.exp(logs)) * x_mask
        return z, m, logs, x_mask

    def remove_weight_norm(self):
        self.enc.remove_weight_norm()

    def __prepare_scriptable__(self):
        for hook in self.enc._forward_pre_hooks.values():
            if (
                hook.__module__ == "torch.nn.utils.weight_norm"
                and hook.__class__.__name__ == "WeightNorm"
            ):
                torch.nn.utils.remove_weight_norm(self.enc)
        return self


class Generator(torch.nn.Module):
    def __init__(
        self,
        initial_channel,
        resblock,
        resblock_kernel_sizes,
        resblock_dilation_sizes,
        upsample_rates,
        upsample_initial_channel,
        upsample_kernel_sizes,
        gin_channels=0,
    ):
        super(Generator, self).__init__()
        self.num_kernels = len(resblock_kernel_sizes)
        self.num_upsamples = len(upsample_rates)
        self.conv_pre = Conv1d(
            initial_channel, upsample_initial_channel, 7, 1, padding=3
        )
        resblock = modules.ResBlock1 if resblock == "1" else modules.ResBlock2

        self.ups = nn.ModuleList()
        for i, (u, k) in enumerate(zip(upsample_rates, upsample_kernel_sizes)):
            self.ups.append(
                weight_norm(
                    ConvTranspose1d(
                        upsample_initial_channel // (2**i),
                        upsample_initial_channel // (2 ** (i + 1)),
                        k,
                        u,
                        padding=(k - u) // 2,
                    )
                )
            )

        self.resblocks = nn.ModuleList()
        for i in range(len(self.ups)):
            ch = upsample_initial_channel // (2 ** (i + 1))
            for j, (k, d) in enumerate(
                zip(resblock_kernel_sizes, resblock_dilation_sizes)
            ):
                self.resblocks.append(resblock(ch, k, d))

        self.conv_post = Conv1d(ch, 1, 7, 1, padding=3, bias=False)
        self.ups.apply(init_weights)

        if gin_channels != 0:
            self.cond = nn.Conv1d(gin_channels, upsample_initial_channel, 1)

    def forward(self, x: torch.Tensor, g: Optional[torch.Tensor] = None):
        x = self.conv_pre(x)
        if g is not None:
            x = x + self.cond(g)

        for i in range(self.num_upsamples):
            x = F.leaky_relu(x, modules.LRELU_SLOPE)
            x = self.ups[i](x)
            xs = None
            for j in range(self.num_kernels):
                if xs is None:
                    xs = self.resblocks[i * self.num_kernels + j](x)
                else:
                    xs += self.resblocks[i * self.num_kernels + j](x)
            x = xs / self.num_kernels
        x = F.leaky_relu(x)
        x = self.conv_post(x)
        x = torch.tanh(x)

        return x

    def __prepare_scriptable__(self):
        for l in self.ups:
            for hook in l._forward_pre_hooks.values():
                # The hook we want to remove is an instance of WeightNorm class, so
                # normally we would do `if isinstance(...)` but this class is not accessible
                # because of shadowing, so we check the module name directly.
                # https://github.com/pytorch/pytorch/blob/be0ca00c5ce260eb5bcec3237357f7a30cc08983/torch/nn/utils/__init__.py#L3
                if (
                    hook.__module__ == "torch.nn.utils.weight_norm"
                    and hook.__class__.__name__ == "WeightNorm"
                ):
                    torch.nn.utils.remove_weight_norm(l)

        for l in self.resblocks:
            for hook in l._forward_pre_hooks.values():
                if (
                    hook.__module__ == "torch.nn.utils.weight_norm"
                    and hook.__class__.__name__ == "WeightNorm"
                ):
                    torch.nn.utils.remove_weight_norm(l)
        return self

    def remove_weight_norm(self):
        for l in self.ups:
            remove_weight_norm(l)
        for l in self.resblocks:
            l.remove_weight_norm()


class SineGen(torch.nn.Module):
    """Definition of sine generator
    SineGen(samp_rate, harmonic_num = 0,
            sine_amp = 0.1, noise_std = 0.003,
            voiced_threshold = 0,
            flag_for_pulse=False)
    samp_rate: sampling rate in Hz
    harmonic_num: number of harmonic overtones (default 0)
    sine_amp: amplitude of sine-wavefrom (default 0.1)
    noise_std: std of Gaussian noise (default 0.003)
    voiced_thoreshold: F0 threshold for U/V classification (default 0)
    flag_for_pulse: this SinGen is used inside PulseGen (default False)
    Note: when flag_for_pulse is True, the first time step of a voiced
        segment is always sin(torch.pi) or cos(0)
    """

    def __init__(
        self,
        samp_rate,
        harmonic_num=0,
        sine_amp=0.1,
        noise_std=0.003,
        voiced_threshold=0,
        flag_for_pulse=False,
    ):
        super(SineGen, self).__init__()
        self.sine_amp = sine_amp
        self.noise_std = noise_std
        self.harmonic_num = harmonic_num
        self.dim = self.harmonic_num + 1
        self.sampling_rate = samp_rate
        self.voiced_threshold = voiced_threshold

    def _f02uv(self, f0):
        # generate uv signal
        uv = torch.ones_like(f0)
        uv = uv * (f0 > self.voiced_threshold)
        if uv.device.type == "privateuseone":  # for DirectML
            uv = uv.float()
        return uv

    def forward(self, f0: torch.Tensor, upp: int):
        """sine_tensor, uv = forward(f0)
        input F0: tensor(batchsize=1, length, dim=1)
                  f0 for unvoiced steps should be 0
        output sine_tensor: tensor(batchsize=1, length, dim)
        output uv: tensor(batchsize=1, length, 1)
        """
        with torch.no_grad():
            f0 = f0[:, None].transpose(1, 2)
            f0_buf = torch.zeros(f0.shape[0], f0.shape[1], self.dim, device=f0.device)
            # fundamental component
            f0_buf[:, :, 0] = f0[:, :, 0]
            for idx in range(self.harmonic_num):
                f0_buf[:, :, idx + 1] = f0_buf[:, :, 0] * (
                    idx + 2
                )  # idx + 2: the (idx+1)-th overtone, (idx+2)-th harmonic
            rad_values = (f0_buf / float(self.sampling_rate)) % 1
            rand_ini = torch.rand(
                f0_buf.shape[0], f0_buf.shape[2], device=f0_buf.device
            )
            rand_ini[:, 0] = 0
            rad_values[:, 0, :] = rad_values[:, 0, :] + rand_ini
            tmp_over_one = torch.cumsum(rad_values, 1)
            tmp_over_one *= upp
            tmp_over_one = F.interpolate(
                tmp_over_one.transpose(2, 1),
                scale_factor=float(upp),
                mode="linear",
                align_corners=True,
            ).transpose(2, 1)
            rad_values = F.interpolate(
                rad_values.transpose(2, 1), scale_factor=float(upp), mode="nearest"
            ).transpose(
                2, 1
            )  #######
            tmp_over_one %= 1
            tmp_over_one_idx = (tmp_over_one[:, 1:, :] - tmp_over_one[:, :-1, :]) < 0
            cumsum_shift = torch.zeros_like(rad_values)
            cumsum_shift[:, 1:, :] = tmp_over_one_idx * -1.0
            sine_waves = torch.sin(
                torch.cumsum(rad_values + cumsum_shift, dim=1) * 2 * torch.pi
            )
            sine_waves = sine_waves * self.sine_amp
            uv = self._f02uv(f0)
            uv = F.interpolate(
                uv.transpose(2, 1), scale_factor=float(upp), mode="nearest"
            ).transpose(2, 1)
            noise_amp = uv * self.noise_std + (1 - uv) * self.sine_amp / 3
            noise = noise_amp * torch.randn_like(sine_waves)
            sine_waves = sine_waves * uv + noise
        return sine_waves, uv, noise


class SourceModuleHnNSF(torch.nn.Module):
    """SourceModule for hn-nsf
    SourceModule(sampling_rate, harmonic_num=0, sine_amp=0.1,
                 add_noise_std=0.003, voiced_threshod=0)
    sampling_rate: sampling_rate in Hz
    harmonic_num: number of harmonic above F0 (default: 0)
    sine_amp: amplitude of sine source signal (default: 0.1)
    add_noise_std: std of additive Gaussian noise (default: 0.003)
        note that amplitude of noise in unvoiced is decided
        by sine_amp
    voiced_threshold: threhold to set U/V given F0 (default: 0)
    Sine_source, noise_source = SourceModuleHnNSF(F0_sampled)
    F0_sampled (batchsize, length, 1)
    Sine_source (batchsize, length, 1)
    noise_source (batchsize, length 1)
    uv (batchsize, length, 1)
    """

    def __init__(
        self,
        sampling_rate,
        harmonic_num=0,
        sine_amp=0.1,
        add_noise_std=0.003,
        voiced_threshod=0,
        is_half=True,
    ):
        super(SourceModuleHnNSF, self).__init__()

        self.sine_amp = sine_amp
        self.noise_std = add_noise_std
        self.is_half = is_half
        # to produce sine waveforms
        self.l_sin_gen = SineGen(
            sampling_rate, harmonic_num, sine_amp, add_noise_std, voiced_threshod
        )

        # to merge source harmonics into a single excitation
        self.l_linear = torch.nn.Linear(harmonic_num + 1, 1)
        self.l_tanh = torch.nn.Tanh()
        # self.ddtype:int = -1

    def forward(self, x: torch.Tensor, upp: int = 1):
        # if self.ddtype ==-1:
        #     self.ddtype = self.l_linear.weight.dtype
        sine_wavs, uv, _ = self.l_sin_gen(x, upp)
        # print(x.dtype,sine_wavs.dtype,self.l_linear.weight.dtype)
        # if self.is_half:
        #     sine_wavs = sine_wavs.half()
        # sine_merge = self.l_tanh(self.l_linear(sine_wavs.to(x)))
        # print(sine_wavs.dtype,self.ddtype)
        # if sine_wavs.dtype != self.l_linear.weight.dtype:
        sine_wavs = sine_wavs.to(dtype=self.l_linear.weight.dtype)
        sine_merge = self.l_tanh(self.l_linear(sine_wavs))
        return sine_merge, None, None  # noise, uv


class GeneratorNSF(torch.nn.Module):
    def __init__(
        self,
        initial_channel,
        resblock,
        resblock_kernel_sizes,
        resblock_dilation_sizes,
        upsample_rates,
        upsample_initial_channel,
        upsample_kernel_sizes,
        gin_channels,
        sr,
        is_half=False,
    ):
        super(GeneratorNSF, self).__init__()
        self.num_kernels = len(resblock_kernel_sizes)
        self.num_upsamples = len(upsample_rates)

        self.f0_upsamp = torch.nn.Upsample(scale_factor=math.prod(upsample_rates))
        self.m_source = SourceModuleHnNSF(
            sampling_rate=sr, harmonic_num=0, is_half=is_half
        )
        self.noise_convs = nn.ModuleList()
        self.conv_pre = Conv1d(
            initial_channel, upsample_initial_channel, 7, 1, padding=3
        )
        resblock = modules.ResBlock1 if resblock == "1" else modules.ResBlock2

        self.ups = nn.ModuleList()
        for i, (u, k) in enumerate(zip(upsample_rates, upsample_kernel_sizes)):
            c_cur = upsample_initial_channel // (2 ** (i + 1))
            self.ups.append(
                weight_norm(
                    ConvTranspose1d(
                        upsample_initial_channel // (2**i),
                        upsample_initial_channel // (2 ** (i + 1)),
                        k,
                        u,
                        padding=(k - u) // 2,
                    )
                )
            )
            if i + 1 < len(upsample_rates):
                stride_f0 = math.prod(upsample_rates[i + 1 :])
                self.noise_convs.append(
                    Conv1d(
                        1,
                        c_cur,
                        kernel_size=stride_f0 * 2,
                        stride=stride_f0,
                        padding=stride_f0 // 2,
                    )
                )
            else:
                self.noise_convs.append(Conv1d(1, c_cur, kernel_size=1))

        self.resblocks = nn.ModuleList()
        for i in range(len(self.ups)):
            ch = upsample_initial_channel // (2 ** (i + 1))
            for j, (k, d) in enumerate(
                zip(resblock_kernel_sizes, resblock_dilation_sizes)
            ):
                self.resblocks.append(resblock(ch, k, d))

        self.conv_post = Conv1d(ch, 1, 7, 1, padding=3, bias=False)
        self.ups.apply(init_weights)

        if gin_channels != 0:
            self.cond = nn.Conv1d(gin_channels, upsample_initial_channel, 1)

        self.upp = math.prod(upsample_rates)

        self.lrelu_slope = modules.LRELU_SLOPE

    def forward(self, x, f0, g: Optional[torch.Tensor] = None):
        har_source, noi_source, uv = self.m_source(f0, self.upp)
        har_source = har_source.transpose(1, 2)
        x = self.conv_pre(x)
        if g is not None:
            x = x + self.cond(g)
        # torch.jit.script() does not support direct indexing of torch modules
        # That's why I wrote this
        for i, (ups, noise_convs) in enumerate(zip(self.ups, self.noise_convs)):
            if i < self.num_upsamples:
                x = F.leaky_relu(x, self.lrelu_slope)
                x = ups(x)
                x_source = noise_convs(har_source)
                x = x + x_source
                xs: Optional[torch.Tensor] = None
                l = [i * self.num_kernels + j for j in range(self.num_kernels)]
                for j, resblock in enumerate(self.resblocks):
                    if j in l:
                        if xs is None:
                            xs = resblock(x)
                        else:
                            xs += resblock(x)
                # This assertion cannot be ignored! \
                # If ignored, it will cause torch.jit.script() compilation errors
                assert isinstance(xs, torch.Tensor)
                x = xs / self.num_kernels
        x = F.leaky_relu(x)
        x = self.conv_post(x)
        x = torch.tanh(x)
        return x

    def remove_weight_norm(self):
        for l in self.ups:
            remove_weight_norm(l)
        for l in self.resblocks:
            l.remove_weight_norm()

    def __prepare_scriptable__(self):
        for l in self.ups:
            for hook in l._forward_pre_hooks.values():
                # The hook we want to remove is an instance of WeightNorm class, so
                # normally we would do `if isinstance(...)` but this class is not accessible
                # because of shadowing, so we check the module name directly.
                # https://github.com/pytorch/pytorch/blob/be0ca00c5ce260eb5bcec3237357f7a30cc08983/torch/nn/utils/__init__.py#L3
                if (
                    hook.__module__ == "torch.nn.utils.weight_norm"
                    and hook.__class__.__name__ == "WeightNorm"
                ):
                    torch.nn.utils.remove_weight_norm(l)
        for l in self.resblocks:
            for hook in self.resblocks._forward_pre_hooks.values():
                if (
                    hook.__module__ == "torch.nn.utils.weight_norm"
                    and hook.__class__.__name__ == "WeightNorm"
                ):
                    torch.nn.utils.remove_weight_norm(l)
        return self


sr2sr = {
    "32k": 32000,
    "40k": 40000,
    "48k": 48000,
}


class SynthesizerTrnMs256NSFsid(nn.Module):
    def __init__(
        self,
        spec_channels,
        segment_size,
        inter_channels,
        hidden_channels,
        filter_channels,
        n_heads,
        n_layers,
        kernel_size,
        p_dropout,
        resblock,
        resblock_kernel_sizes,
        resblock_dilation_sizes,
        upsample_rates,
        upsample_initial_channel,
        upsample_kernel_sizes,
        spk_embed_dim,
        gin_channels,
        sr,
        **kwargs
    ):
        super(SynthesizerTrnMs256NSFsid, self).__init__()
        if isinstance(sr, str):
            sr = sr2sr[sr]
        self.spec_channels = spec_channels
        self.inter_channels = inter_channels
        self.hidden_channels = hidden_channels
        self.filter_channels = filter_channels
        self.n_heads = n_heads
        self.n_layers = n_layers
        self.kernel_size = kernel_size
        self.p_dropout = float(p_dropout)
        self.resblock = resblock
        self.resblock_kernel_sizes = resblock_kernel_sizes
        self.resblock_dilation_sizes = resblock_dilation_sizes
        self.upsample_rates = upsample_rates
        self.upsample_initial_channel = upsample_initial_channel
        self.upsample_kernel_sizes = upsample_kernel_sizes
        self.segment_size = segment_size
        self.gin_channels = gin_channels
        # self.hop_length = hop_length#
        self.spk_embed_dim = spk_embed_dim
        self.enc_p = TextEncoder256(
            inter_channels,
            hidden_channels,
            filter_channels,
            n_heads,
            n_layers,
            kernel_size,
            float(p_dropout),
        )
        self.dec = GeneratorNSF(
            inter_channels,
            resblock,
            resblock_kernel_sizes,
            resblock_dilation_sizes,
            upsample_rates,
            upsample_initial_channel,
            upsample_kernel_sizes,
            gin_channels=gin_channels,
            sr=sr,
            is_half=kwargs["is_half"],
        )
        self.enc_q = PosteriorEncoder(
            spec_channels,
            inter_channels,
            hidden_channels,
            5,
            1,
            16,
            gin_channels=gin_channels,
        )
        self.flow = ResidualCouplingBlock(
            inter_channels, hidden_channels, 5, 1, 3, gin_channels=gin_channels
        )
        self.emb_g = nn.Embedding(self.spk_embed_dim, gin_channels)

    def remove_weight_norm(self):
        self.dec.remove_weight_norm()
        self.flow.remove_weight_norm()
        self.enc_q.remove_weight_norm()

    def __prepare_scriptable__(self):
        for hook in self.dec._forward_pre_hooks.values():
            # The hook we want to remove is an instance of WeightNorm class, so
            # normally we would do `if isinstance(...)` but this class is not accessible
            # because of shadowing, so we check the module name directly.
            # https://github.com/pytorch/pytorch/blob/be0ca00c5ce260eb5bcec3237357f7a30cc08983/torch/nn/utils/__init__.py#L3
            if (
                hook.__module__ == "torch.nn.utils.weight_norm"
                and hook.__class__.__name__ == "WeightNorm"
            ):
                torch.nn.utils.remove_weight_norm(self.dec)
        for hook in self.flow._forward_pre_hooks.values():
            if (
                hook.__module__ == "torch.nn.utils.weight_norm"
                and hook.__class__.__name__ == "WeightNorm"
            ):
                torch.nn.utils.remove_weight_norm(self.flow)
        if hasattr(self, "enc_q"):
            for hook in self.enc_q._forward_pre_hooks.values():
                if (
                    hook.__module__ == "torch.nn.utils.weight_norm"
                    and hook.__class__.__name__ == "WeightNorm"
                ):
                    torch.nn.utils.remove_weight_norm(self.enc_q)
        return self

    @torch.jit.ignore
    def forward(
        self,
        phone: torch.Tensor,
        phone_lengths: torch.Tensor,
        pitch: torch.Tensor,
        pitchf: torch.Tensor,
        y: torch.Tensor,
        y_lengths: torch.Tensor,
        ds: Optional[torch.Tensor] = None,
    ):  # 这里ds是id，[bs,1]
        # print(1,pitch.shape)#[bs,t]
        g = self.emb_g(ds).unsqueeze(-1)  # [b, 256, 1]##1是t，广播的
        m_p, logs_p, x_mask = self.enc_p(phone, pitch, phone_lengths)
        z, m_q, logs_q, y_mask = self.enc_q(y, y_lengths, g=g)
        z_p = self.flow(z, y_mask, g=g)
        z_slice, ids_slice = commons.rand_slice_segments(
            z, y_lengths, self.segment_size
        )
        # print(-1,pitchf.shape,ids_slice,self.segment_size,self.hop_length,self.segment_size//self.hop_length)
        pitchf = commons.slice_segments2(pitchf, ids_slice, self.segment_size)
        # print(-2,pitchf.shape,z_slice.shape)
        o = self.dec(z_slice, pitchf, g=g)
        return o, ids_slice, x_mask, y_mask, (z, z_p, m_p, logs_p, m_q, logs_q)

    @torch.jit.export
    def infer(
        self,
        phone: torch.Tensor,
        phone_lengths: torch.Tensor,
        pitch: torch.Tensor,
        nsff0: torch.Tensor,
        sid: torch.Tensor,
        rate: Optional[torch.Tensor] = None,
    ):
        g = self.emb_g(sid).unsqueeze(-1)
        m_p, logs_p, x_mask = self.enc_p(phone, pitch, phone_lengths)
        z_p = (m_p + torch.exp(logs_p) * torch.randn_like(m_p) * 0.66666) * x_mask
        if rate is not None:
            assert isinstance(rate, torch.Tensor)
            head = int(z_p.shape[2] * (1 - rate.item()))
            z_p = z_p[:, :, head:]
            x_mask = x_mask[:, :, head:]
            nsff0 = nsff0[:, head:]
        z = self.flow(z_p, x_mask, g=g, reverse=True)
        o = self.dec(z * x_mask, nsff0, g=g)
        return o, x_mask, (z, z_p, m_p, logs_p)


class SynthesizerTrnMs768NSFsid(nn.Module):
    def __init__(
        self,
        spec_channels,
        segment_size,
        inter_channels,
        hidden_channels,
        filter_channels,
        n_heads,
        n_layers,
        kernel_size,
        p_dropout,
        resblock,
        resblock_kernel_sizes,
        resblock_dilation_sizes,
        upsample_rates,
        upsample_initial_channel,
        upsample_kernel_sizes,
        spk_embed_dim,
        gin_channels,
        sr,
        **kwargs
    ):
        super(SynthesizerTrnMs768NSFsid, self).__init__()
        if isinstance(sr, str):
            sr = sr
        self.spec_channels = spec_channels
        self.inter_channels = inter_channels
        self.hidden_channels = hidden_channels
        self.filter_channels = filter_channels
        self.n_heads = n_heads
        self.n_layers = n_layers
        self.kernel_size = kernel_size
        self.p_dropout = float(p_dropout)
        self.resblock = resblock
        self.resblock_kernel_sizes = resblock_kernel_sizes
        self.resblock_dilation_sizes = resblock_dilation_sizes
        self.upsample_rates = upsample_rates
        self.upsample_initial_channel = upsample_initial_channel
        self.upsample_kernel_sizes = upsample_kernel_sizes
        self.segment_size = segment_size
        self.gin_channels = gin_channels
        # self.hop_length = hop_length#
        self.spk_embed_dim = spk_embed_dim
        self.enc_p = TextEncoder768(
            inter_channels,
            hidden_channels,
            filter_channels,
            n_heads,
            n_layers,
            kernel_size,
            float(p_dropout),
        )
        self.dec = GeneratorNSF(
            inter_channels,
            resblock,
            resblock_kernel_sizes,
            resblock_dilation_sizes,
            upsample_rates,
            upsample_initial_channel,
            upsample_kernel_sizes,
            gin_channels=gin_channels,
            sr=sr,
            is_half=kwargs["is_half"],
        )
        self.enc_q = PosteriorEncoder(
            spec_channels,
            inter_channels,
            hidden_channels,
            5,
            1,
            16,
            gin_channels=gin_channels,
        )
        self.flow = ResidualCouplingBlock(
            inter_channels, hidden_channels, 5, 1, 3, gin_channels=gin_channels
        )
        self.emb_g = nn.Embedding(self.spk_embed_dim, gin_channels)

    def remove_weight_norm(self):
        self.dec.remove_weight_norm()
        self.flow.remove_weight_norm()
        self.enc_q.remove_weight_norm()

    def __prepare_scriptable__(self):
        for hook in self.dec._forward_pre_hooks.values():
            # The hook we want to remove is an instance of WeightNorm class, so
            # normally we would do `if isinstance(...)` but this class is not accessible
            # because of shadowing, so we check the module name directly.
            # https://github.com/pytorch/pytorch/blob/be0ca00c5ce260eb5bcec3237357f7a30cc08983/torch/nn/utils/__init__.py#L3
            if (
                hook.__module__ == "torch.nn.utils.weight_norm"
                and hook.__class__.__name__ == "WeightNorm"
            ):
                torch.nn.utils.remove_weight_norm(self.dec)
        for hook in self.flow._forward_pre_hooks.values():
            if (
                hook.__module__ == "torch.nn.utils.weight_norm"
                and hook.__class__.__name__ == "WeightNorm"
            ):
                torch.nn.utils.remove_weight_norm(self.flow)
        if hasattr(self, "enc_q"):
            for hook in self.enc_q._forward_pre_hooks.values():
                if (
                    hook.__module__ == "torch.nn.utils.weight_norm"
                    and hook.__class__.__name__ == "WeightNorm"
                ):
                    torch.nn.utils.remove_weight_norm(self.enc_q)
        return self

    @torch.jit.ignore
    def forward(
        self, phone, phone_lengths, pitch, pitchf, y, y_lengths, ds
    ):  # 这里ds是id，[bs,1]
        # print(1,pitch.shape)#[bs,t]
        g = self.emb_g(ds).unsqueeze(-1)  # [b, 256, 1]##1是t，广播的
        m_p, logs_p, x_mask = self.enc_p(phone, pitch, phone_lengths)
        z, m_q, logs_q, y_mask = self.enc_q(y, y_lengths, g=g)
        z_p = self.flow(z, y_mask, g=g)
        z_slice, ids_slice = commons.rand_slice_segments(
            z, y_lengths, self.segment_size
        )
        # print(-1,pitchf.shape,ids_slice,self.segment_size,self.hop_length,self.segment_size//self.hop_length)
        pitchf = commons.slice_segments2(pitchf, ids_slice, self.segment_size)
        # print(-2,pitchf.shape,z_slice.shape)
        o = self.dec(z_slice, pitchf, g=g)
        return o, ids_slice, x_mask, y_mask, (z, z_p, m_p, logs_p, m_q, logs_q)

    @torch.jit.export
    def infer(
        self,
        phone: torch.Tensor,
        phone_lengths: torch.Tensor,
        pitch: torch.Tensor,
        nsff0: torch.Tensor,
        sid: torch.Tensor,
        rate: Optional[torch.Tensor] = None,
    ):
        g = self.emb_g(sid).unsqueeze(-1)
        m_p, logs_p, x_mask = self.enc_p(phone, pitch, phone_lengths)
        z_p = (m_p + torch.exp(logs_p) * torch.randn_like(m_p) * 0.66666) * x_mask
        if rate is not None:
            head = int(z_p.shape[2] * (1.0 - rate.item()))
            z_p = z_p[:, :, head:]
            x_mask = x_mask[:, :, head:]
            nsff0 = nsff0[:, head:]
        z = self.flow(z_p, x_mask, g=g, reverse=True)
        o = self.dec(z * x_mask, nsff0, g=g)
        return o, x_mask, (z, z_p, m_p, logs_p)


class SynthesizerTrnMs256NSFsid_nono(nn.Module):
    def __init__(
        self,
        spec_channels,
        segment_size,
        inter_channels,
        hidden_channels,
        filter_channels,
        n_heads,
        n_layers,
        kernel_size,
        p_dropout,
        resblock,
        resblock_kernel_sizes,
        resblock_dilation_sizes,
        upsample_rates,
        upsample_initial_channel,
        upsample_kernel_sizes,
        spk_embed_dim,
        gin_channels,
        sr=None,
        **kwargs
    ):
        super(SynthesizerTrnMs256NSFsid_nono, self).__init__()
        self.spec_channels = spec_channels
        self.inter_channels = inter_channels
        self.hidden_channels = hidden_channels
        self.filter_channels = filter_channels
        self.n_heads = n_heads
        self.n_layers = n_layers
        self.kernel_size = kernel_size
        self.p_dropout = float(p_dropout)
        self.resblock = resblock
        self.resblock_kernel_sizes = resblock_kernel_sizes
        self.resblock_dilation_sizes = resblock_dilation_sizes
        self.upsample_rates = upsample_rates
        self.upsample_initial_channel = upsample_initial_channel
        self.upsample_kernel_sizes = upsample_kernel_sizes
        self.segment_size = segment_size
        self.gin_channels = gin_channels
        # self.hop_length = hop_length#
        self.spk_embed_dim = spk_embed_dim
        self.enc_p = TextEncoder256(
            inter_channels,
            hidden_channels,
            filter_channels,
            n_heads,
            n_layers,
            kernel_size,
            float(p_dropout),
            f0=False,
        )
        self.dec = Generator(
            inter_channels,
            resblock,
            resblock_kernel_sizes,
            resblock_dilation_sizes,
            upsample_rates,
            upsample_initial_channel,
            upsample_kernel_sizes,
            gin_channels=gin_channels,
        )
        self.enc_q = PosteriorEncoder(
            spec_channels,
            inter_channels,
            hidden_channels,
            5,
            1,
            16,
            gin_channels=gin_channels,
        )
        self.flow = ResidualCouplingBlock(
            inter_channels, hidden_channels, 5, 1, 3, gin_channels=gin_channels
        )
        self.emb_g = nn.Embedding(self.spk_embed_dim, gin_channels)

    def remove_weight_norm(self):
        self.dec.remove_weight_norm()
        self.flow.remove_weight_norm()
        self.enc_q.remove_weight_norm()

    def __prepare_scriptable__(self):
        for hook in self.dec._forward_pre_hooks.values():
            # The hook we want to remove is an instance of WeightNorm class, so
            # normally we would do `if isinstance(...)` but this class is not accessible
            # because of shadowing, so we check the module name directly.
            # https://github.com/pytorch/pytorch/blob/be0ca00c5ce260eb5bcec3237357f7a30cc08983/torch/nn/utils/__init__.py#L3
            if (
                hook.__module__ == "torch.nn.utils.weight_norm"
                and hook.__class__.__name__ == "WeightNorm"
            ):
                torch.nn.utils.remove_weight_norm(self.dec)
        for hook in self.flow._forward_pre_hooks.values():
            if (
                hook.__module__ == "torch.nn.utils.weight_norm"
                and hook.__class__.__name__ == "WeightNorm"
            ):
                torch.nn.utils.remove_weight_norm(self.flow)
        if hasattr(self, "enc_q"):
            for hook in self.enc_q._forward_pre_hooks.values():
                if (
                    hook.__module__ == "torch.nn.utils.weight_norm"
                    and hook.__class__.__name__ == "WeightNorm"
                ):
                    torch.nn.utils.remove_weight_norm(self.enc_q)
        return self

    @torch.jit.ignore
    def forward(self, phone, phone_lengths, y, y_lengths, ds):  # 这里ds是id，[bs,1]
        g = self.emb_g(ds).unsqueeze(-1)  # [b, 256, 1]##1是t，广播的
        m_p, logs_p, x_mask = self.enc_p(phone, None, phone_lengths)
        z, m_q, logs_q, y_mask = self.enc_q(y, y_lengths, g=g)
        z_p = self.flow(z, y_mask, g=g)
        z_slice, ids_slice = commons.rand_slice_segments(
            z, y_lengths, self.segment_size
        )
        o = self.dec(z_slice, g=g)
        return o, ids_slice, x_mask, y_mask, (z, z_p, m_p, logs_p, m_q, logs_q)

    @torch.jit.export
    def infer(
        self,
        phone: torch.Tensor,
        phone_lengths: torch.Tensor,
        sid: torch.Tensor,
        rate: Optional[torch.Tensor] = None,
    ):
        g = self.emb_g(sid).unsqueeze(-1)
        m_p, logs_p, x_mask = self.enc_p(phone, None, phone_lengths)
        z_p = (m_p + torch.exp(logs_p) * torch.randn_like(m_p) * 0.66666) * x_mask
        if rate is not None:
            head = int(z_p.shape[2] * (1.0 - rate.item()))
            z_p = z_p[:, :, head:]
            x_mask = x_mask[:, :, head:]
        z = self.flow(z_p, x_mask, g=g, reverse=True)
        o = self.dec(z * x_mask, g=g)
        return o, x_mask, (z, z_p, m_p, logs_p)


class SynthesizerTrnMs768NSFsid_nono(nn.Module):
    def __init__(
        self,
        spec_channels,
        segment_size,
        inter_channels,
        hidden_channels,
        filter_channels,
        n_heads,
        n_layers,
        kernel_size,
        p_dropout,
        resblock,
        resblock_kernel_sizes,
        resblock_dilation_sizes,
        upsample_rates,
        upsample_initial_channel,
        upsample_kernel_sizes,
        spk_embed_dim,
        gin_channels,
        sr=None,
        **kwargs
    ):
        super(SynthesizerTrnMs768NSFsid_nono, self).__init__()
        self.spec_channels = spec_channels
        self.inter_channels = inter_channels
        self.hidden_channels = hidden_channels
        self.filter_channels = filter_channels
        self.n_heads = n_heads
        self.n_layers = n_layers
        self.kernel_size = kernel_size
        self.p_dropout = float(p_dropout)
        self.resblock = resblock
        self.resblock_kernel_sizes = resblock_kernel_sizes
        self.resblock_dilation_sizes = resblock_dilation_sizes
        self.upsample_rates = upsample_rates
        self.upsample_initial_channel = upsample_initial_channel
        self.upsample_kernel_sizes = upsample_kernel_sizes
        self.segment_size = segment_size
        self.gin_channels = gin_channels
        # self.hop_length = hop_length#
        self.spk_embed_dim = spk_embed_dim
        self.enc_p = TextEncoder768(
            inter_channels,
            hidden_channels,
            filter_channels,
            n_heads,
            n_layers,
            kernel_size,
            float(p_dropout),
            f0=False,
        )
        self.dec = Generator(
            inter_channels,
            resblock,
            resblock_kernel_sizes,
            resblock_dilation_sizes,
            upsample_rates,
            upsample_initial_channel,
            upsample_kernel_sizes,
            gin_channels=gin_channels,
        )
        self.enc_q = PosteriorEncoder(
            spec_channels,
            inter_channels,
            hidden_channels,
            5,
            1,
            16,
            gin_channels=gin_channels,
        )
        self.flow = ResidualCouplingBlock(
            inter_channels, hidden_channels, 5, 1, 3, gin_channels=gin_channels
        )
        self.emb_g = nn.Embedding(self.spk_embed_dim, gin_channels)

    def remove_weight_norm(self):
        self.dec.remove_weight_norm()
        self.flow.remove_weight_norm()
        self.enc_q.remove_weight_norm()

    def __prepare_scriptable__(self):
        for hook in self.dec._forward_pre_hooks.values():
            # The hook we want to remove is an instance of WeightNorm class, so
            # normally we would do `if isinstance(...)` but this class is not accessible
            # because of shadowing, so we check the module name directly.
            # https://github.com/pytorch/pytorch/blob/be0ca00c5ce260eb5bcec3237357f7a30cc08983/torch/nn/utils/__init__.py#L3
            if (
                hook.__module__ == "torch.nn.utils.weight_norm"
                and hook.__class__.__name__ == "WeightNorm"
            ):
                torch.nn.utils.remove_weight_norm(self.dec)
        for hook in self.flow._forward_pre_hooks.values():
            if (
                hook.__module__ == "torch.nn.utils.weight_norm"
                and hook.__class__.__name__ == "WeightNorm"
            ):
                torch.nn.utils.remove_weight_norm(self.flow)
        if hasattr(self, "enc_q"):
            for hook in self.enc_q._forward_pre_hooks.values():
                if (
                    hook.__module__ == "torch.nn.utils.weight_norm"
                    and hook.__class__.__name__ == "WeightNorm"
                ):
                    torch.nn.utils.remove_weight_norm(self.enc_q)
        return self

    @torch.jit.ignore
    def forward(self, phone, phone_lengths, y, y_lengths, ds):  # 这里ds是id，[bs,1]
        g = self.emb_g(ds).unsqueeze(-1)  # [b, 256, 1]##1是t，广播的
        m_p, logs_p, x_mask = self.enc_p(phone, None, phone_lengths)
        z, m_q, logs_q, y_mask = self.enc_q(y, y_lengths, g=g)
        z_p = self.flow(z, y_mask, g=g)
        z_slice, ids_slice = commons.rand_slice_segments(
            z, y_lengths, self.segment_size
        )
        o = self.dec(z_slice, g=g)
        return o, ids_slice, x_mask, y_mask, (z, z_p, m_p, logs_p, m_q, logs_q)

    @torch.jit.export
    def infer(
        self,
        phone: torch.Tensor,
        phone_lengths: torch.Tensor,
        sid: torch.Tensor,
        rate: Optional[torch.Tensor] = None,
    ):
        g = self.emb_g(sid).unsqueeze(-1)
        m_p, logs_p, x_mask = self.enc_p(phone, None, phone_lengths)
        z_p = (m_p + torch.exp(logs_p) * torch.randn_like(m_p) * 0.66666) * x_mask
        if rate is not None:
            head = int(z_p.shape[2] * (1.0 - rate.item()))
            z_p = z_p[:, :, head:]
            x_mask = x_mask[:, :, head:]
        z = self.flow(z_p, x_mask, g=g, reverse=True)
        o = self.dec(z * x_mask, g=g)
        return o, x_mask, (z, z_p, m_p, logs_p)


class MultiPeriodDiscriminator(torch.nn.Module):
    def __init__(self, use_spectral_norm=False):
        super(MultiPeriodDiscriminator, self).__init__()
        periods = [2, 3, 5, 7, 11, 17]
        # periods = [3, 5, 7, 11, 17, 23, 37]

        discs = [DiscriminatorS(use_spectral_norm=use_spectral_norm)]
        discs = discs + [
            DiscriminatorP(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)
            # for j in range(len(fmap_r)):
            #     print(i,j,y.shape,y_hat.shape,fmap_r[j].shape,fmap_g[j].shape)
            y_d_rs.append(y_d_r)
            y_d_gs.append(y_d_g)
            fmap_rs.append(fmap_r)
            fmap_gs.append(fmap_g)

        return y_d_rs, y_d_gs, fmap_rs, fmap_gs


class MultiPeriodDiscriminatorV2(torch.nn.Module):
    def __init__(self, use_spectral_norm=False):
        super(MultiPeriodDiscriminatorV2, self).__init__()
        # periods = [2, 3, 5, 7, 11, 17]
        periods = [2, 3, 5, 7, 11, 17, 23, 37]

        discs = [DiscriminatorS(use_spectral_norm=use_spectral_norm)]
        discs = discs + [
            DiscriminatorP(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)
            # for j in range(len(fmap_r)):
            #     print(i,j,y.shape,y_hat.shape,fmap_r[j].shape,fmap_g[j].shape)
            y_d_rs.append(y_d_r)
            y_d_gs.append(y_d_g)
            fmap_rs.append(fmap_r)
            fmap_gs.append(fmap_g)

        return y_d_rs, y_d_gs, fmap_rs, fmap_gs


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, modules.LRELU_SLOPE)
            fmap.append(x)
        x = self.conv_post(x)
        fmap.append(x)
        x = torch.flatten(x, 1, -1)

        return x, fmap


class DiscriminatorP(torch.nn.Module):
    def __init__(self, period, kernel_size=5, stride=3, use_spectral_norm=False):
        super(DiscriminatorP, 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)
            if has_xpu and x.dtype == torch.bfloat16:
                x = F.pad(x.to(dtype=torch.float16), (0, n_pad), "reflect").to(
                    dtype=torch.bfloat16
                )
            else:
                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, modules.LRELU_SLOPE)
            fmap.append(x)
        x = self.conv_post(x)
        fmap.append(x)
        x = torch.flatten(x, 1, -1)

        return x, fmap