resources/app/python/fastpitch/models.py

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import sys
from typing import Optional
from os.path import abspath, dirname

import torch

# enabling modules discovery from global entrypoint
sys.path.append(abspath(dirname(__file__)+'/'))
from python.fastpitch.fastpitch import FastPitch as _FastPitch
# from python.model_fp import WaveGlow


def parse_model_args(model_name, symbols_alphabet, parser, add_help=False):
    from python.fastpitch.arg_parser import parse_fastpitch_args
    return parse_fastpitch_args(symbols_alphabet, parser, add_help)

def batchnorm_to_float(module):
    """Converts batch norm to FP32"""
    if isinstance(module, torch.nn.modules.batchnorm._BatchNorm):
        module.float()
    for child in module.children():
        batchnorm_to_float(child)
    return module


def init_bn(module):
    if isinstance(module, torch.nn.modules.batchnorm._BatchNorm):
        if module.affine:
            module.weight.data.uniform_()
    for child in module.children():
        init_bn(child)


def get_model(model_name, model_config, device, logger, uniform_initialize_bn_weight=False, forward_is_infer=False, jitable=False):
    model = None
    model_config["device"] = device

    if model_name == 'WaveGlow':
        if forward_is_infer:
            class WaveGlow__forward_is_infer(WaveGlow):
                def forward(self, spect, sigma=1.0):
                    return self.infer(spect, sigma)
            model = WaveGlow__forward_is_infer(**model_config, logger=logger)
        else:
            model = WaveGlow(**model_config, logger=logger)

    elif model_name == 'FastPitch':

        model_config["padding_idx"] = 0
        model_config["pitch_embedding_kernel_size"] = 3
        model_config["n_speakers"] = 5
        model_config["speaker_emb_weight"] = 1.0

        if forward_is_infer:

            class FastPitch__forward_is_infer(_FastPitch):
                def forward(self, inputs, input_lengths=None, pace: float = 1.0,
                            dur_tgt: Optional[torch.Tensor] = None,
                            pitch_tgt: Optional[torch.Tensor] = None,
                            pitch_transform=None, device=None):
                    return self.infer_advanced(inputs, input_lengths, pace=pace,
                                      dur_tgt=dur_tgt, pitch_tgt=pitch_tgt,
                                      pitch_transform=pitch_transform)

            model = FastPitch__forward_is_infer(**model_config)
        else:
            model = _FastPitch(**model_config)

    else:
        raise NotImplementedError(model_name)

    if uniform_initialize_bn_weight:
        init_bn(model)

    return model.to(device)


def get_model_config(model_name, args):
    if model_name == 'WaveGlow':
        model_config = dict(
            n_mel_channels=args.n_mel_channels,
            n_flows=args.flows,
            n_group=args.groups,
            n_early_every=args.early_every,
            n_early_size=args.early_size,
            WN_config=dict(
                n_layers=args.wn_layers,
                kernel_size=args.wn_kernel_size,
                n_channels=args.wn_channels
            )
        )
        return model_config
    elif model_name == 'FastPitch':
        model_config = dict(
            # io
            n_mel_channels=args.n_mel_channels,
            max_seq_len=args.max_seq_len,
            # symbols
            n_symbols=args.n_symbols,
            symbols_embedding_dim=args.symbols_embedding_dim,
            # input FFT
            in_fft_n_layers=args.in_fft_n_layers,
            in_fft_n_heads=args.in_fft_n_heads,
            in_fft_d_head=args.in_fft_d_head,
            in_fft_conv1d_kernel_size=args.in_fft_conv1d_kernel_size,
            in_fft_conv1d_filter_size=args.in_fft_conv1d_filter_size,
            in_fft_output_size=args.in_fft_output_size,
            p_in_fft_dropout=args.p_in_fft_dropout,
            p_in_fft_dropatt=args.p_in_fft_dropatt,
            p_in_fft_dropemb=args.p_in_fft_dropemb,
            # output FFT
            out_fft_n_layers=args.out_fft_n_layers,
            out_fft_n_heads=args.out_fft_n_heads,
            out_fft_d_head=args.out_fft_d_head,
            out_fft_conv1d_kernel_size=args.out_fft_conv1d_kernel_size,
            out_fft_conv1d_filter_size=args.out_fft_conv1d_filter_size,
            out_fft_output_size=args.out_fft_output_size,
            p_out_fft_dropout=args.p_out_fft_dropout,
            p_out_fft_dropatt=args.p_out_fft_dropatt,
            p_out_fft_dropemb=args.p_out_fft_dropemb,
            # duration predictor
            dur_predictor_kernel_size=args.dur_predictor_kernel_size,
            dur_predictor_filter_size=args.dur_predictor_filter_size,
            p_dur_predictor_dropout=args.p_dur_predictor_dropout,
            dur_predictor_n_layers=args.dur_predictor_n_layers,
            # pitch predictor
            pitch_predictor_kernel_size=args.pitch_predictor_kernel_size,
            pitch_predictor_filter_size=args.pitch_predictor_filter_size,
            p_pitch_predictor_dropout=args.p_pitch_predictor_dropout,
            pitch_predictor_n_layers=args.pitch_predictor_n_layers,
        )
        return model_config

    else:
        raise NotImplementedError(model_name)