import os import random import numpy as np import torch import torch.utils.data from tqdm import tqdm import models.tacotron2.layers as layers from models.tacotron2.taco_utils import load_wav_to_torch, load_filepaths_and_text from models.tacotron2.text import text_to_sequence from utils.util import opt_get class TextMelLoader(torch.utils.data.Dataset): """ 1) loads audio,text pairs 2) normalizes text and converts them to sequences of one-hot vectors 3) computes mel-spectrograms from audio files. """ def __init__(self, hparams): self.path = os.path.dirname(hparams['path']) self.audiopaths_and_text = load_filepaths_and_text(hparams['path']) self.text_cleaners = hparams.text_cleaners self.max_wav_value = hparams.max_wav_value self.sampling_rate = hparams.sampling_rate self.load_mel_from_disk = hparams.load_mel_from_disk self.return_wavs = opt_get(hparams, ['return_wavs'], False) self.input_sample_rate = opt_get(hparams, ['input_sample_rate'], self.sampling_rate) assert not (self.load_mel_from_disk and self.return_wavs) self.stft = layers.TacotronSTFT( hparams.filter_length, hparams.hop_length, hparams.win_length, hparams.n_mel_channels, hparams.sampling_rate, hparams.mel_fmin, hparams.mel_fmax) random.seed(hparams.seed) random.shuffle(self.audiopaths_and_text) def get_mel_text_pair(self, audiopath_and_text): # separate filename and text audiopath, text = audiopath_and_text[0], audiopath_and_text[1] audiopath = os.path.join(self.path, audiopath) text = self.get_text(text) mel = self.get_mel(audiopath) return (text, mel, audiopath_and_text[0]) def get_mel(self, filename): if not self.load_mel_from_disk: audio, sampling_rate = load_wav_to_torch(filename) if sampling_rate != self.input_sample_rate: raise ValueError(f"Input sampling rate does not match specified rate {self.input_sample_rate}") audio_norm = audio / self.max_wav_value audio_norm = audio_norm.unsqueeze(0) audio_norm = torch.autograd.Variable(audio_norm, requires_grad=False) if self.input_sample_rate != self.sampling_rate: ratio = self.sampling_rate / self.input_sample_rate audio_norm = torch.nn.functional.interpolate(audio_norm.unsqueeze(0), scale_factor=ratio, mode='area').squeeze(0) if self.return_wavs: melspec = audio_norm else: melspec = self.stft.mel_spectrogram(audio_norm) melspec = torch.squeeze(melspec, 0) else: melspec = torch.from_numpy(np.load(filename)) assert melspec.size(0) == self.stft.n_mel_channels, ( 'Mel dimension mismatch: given {}, expected {}'.format( melspec.size(0), self.stft.n_mel_channels)) return melspec def get_text(self, text): text_norm = torch.IntTensor(text_to_sequence(text, self.text_cleaners)) return text_norm def __getitem__(self, index): return self.get_mel_text_pair(self.audiopaths_and_text[index]) def __len__(self): return len(self.audiopaths_and_text) class TextMelCollate(): """ Zero-pads model inputs and targets based on number of frames per setep """ def __init__(self, n_frames_per_step): self.n_frames_per_step = n_frames_per_step def __call__(self, batch): """Collate's training batch from normalized text and mel-spectrogram PARAMS ------ batch: [text_normalized, mel_normalized, filename] """ # Right zero-pad all one-hot text sequences to max input length input_lengths, ids_sorted_decreasing = torch.sort( torch.LongTensor([len(x[0]) for x in batch]), dim=0, descending=True) max_input_len = input_lengths[0] text_padded = torch.LongTensor(len(batch), max_input_len) text_padded.zero_() filenames = [] for i in range(len(ids_sorted_decreasing)): text = batch[ids_sorted_decreasing[i]][0] text_padded[i, :text.size(0)] = text filenames.append(batch[ids_sorted_decreasing[i]][2]) # Right zero-pad mel-spec num_mels = batch[0][1].size(0) max_target_len = max([x[1].size(1) for x in batch]) if max_target_len % self.n_frames_per_step != 0: max_target_len += self.n_frames_per_step - max_target_len % self.n_frames_per_step assert max_target_len % self.n_frames_per_step == 0 # include mel padded and gate padded mel_padded = torch.FloatTensor(len(batch), num_mels, max_target_len) mel_padded.zero_() gate_padded = torch.FloatTensor(len(batch), max_target_len) gate_padded.zero_() output_lengths = torch.LongTensor(len(batch)) for i in range(len(ids_sorted_decreasing)): mel = batch[ids_sorted_decreasing[i]][1] mel_padded[i, :, :mel.size(1)] = mel gate_padded[i, mel.size(1)-1:] = 1 output_lengths[i] = mel.size(1) return { 'padded_text': text_padded, 'input_lengths': input_lengths, 'padded_mel': mel_padded, 'padded_gate': gate_padded, 'output_lengths': output_lengths, 'filenames': filenames } if __name__ == '__main__': params = { 'mode': 'nv_tacotron', 'path': 'E:\\audio\\LJSpeech-1.1\\ljs_audio_text_train_filelist.txt', 'phase': 'train', 'n_workers': 1, 'batch_size': 32, #'return_wavs': True, #'input_sample_rate': 22050, #'sampling_rate': 8000 } from data import create_dataset, create_dataloader ds, c = create_dataset(params, return_collate=True) dl = create_dataloader(ds, params, collate_fn=c) i = 0 m = None for i, b in tqdm(enumerate(dl)): pm = b['padded_mel'] pm = torch.nn.functional.pad(pm, (0, 800-pm.shape[-1])) m = pm if m is None else torch.cat([m, pm], dim=0) print(m.mean(), m.std())