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| import torch | |
| import numpy as np | |
| import pandas as pd | |
| import json | |
| import argparse | |
| from tqdm import tqdm | |
| import os | |
| from Utility.storage_config import MODELS_DIR | |
| def approximate_and_inject_language_embeddings(model_path, df, iso_lookup, min_n_langs=5, max_n_langs=25, threshold_percentile=50): | |
| # load pretrained language_embeddings | |
| model = torch.load(model_path, map_location="cpu") | |
| lang_embs = model["model"]["encoder.language_embedding.weight"] | |
| features_per_closest_lang = 2 | |
| # for combined, df has up to 5 features (if containing individual distances) per closest lang + 1 target lang column | |
| if "combined_dist_0" in df.columns: | |
| if "map_dist_0" in df.columns: | |
| features_per_closest_lang += 1 | |
| if "asp_dist_0" in df.columns: | |
| features_per_closest_lang += 1 | |
| if "tree_dist_0" in df.columns: | |
| features_per_closest_lang += 1 | |
| n_closest = len(df.columns) // features_per_closest_lang | |
| distance_type = "combined" | |
| # else, df has 2 features per closest lang + 1 target lang column | |
| else: | |
| n_closest = len(df.columns) // features_per_closest_lang | |
| if "map_dist_0" in df.columns: | |
| distance_type = "map" | |
| elif "tree_dist_0" in df.columns: | |
| distance_type = "tree" | |
| elif "asp_dist_0" in df.columns: | |
| distance_type = "asp" | |
| elif "learned_dist_0" in df.columns: | |
| distance_type = "learned" | |
| else: | |
| distance_type = "random" | |
| # get relevant columns | |
| closest_lang_columns = [f"closest_lang_{i}" for i in range(n_closest)] | |
| closest_dist_columns = [f"{distance_type}_dist_{i}" for i in range(n_closest)] | |
| closest_lang_columns = closest_lang_columns[:max_n_langs] | |
| closest_dist_columns = closest_dist_columns[:max_n_langs] | |
| assert df[closest_dist_columns[-1]].isna().sum().sum() == 0 | |
| # get threshold based on distance of a certain percentile of the furthest language across all samples | |
| threshold = np.percentile(df[closest_dist_columns[-1]], threshold_percentile) | |
| print(f"threshold: {threshold:.4f}") | |
| for row in tqdm(df.itertuples(), total=df.shape[0], desc="Approximating language embeddings"): | |
| avg_emb = torch.zeros([16]) | |
| dists = [getattr(row, d) for i, d in enumerate(closest_dist_columns) if i < min_n_langs or getattr(row, d) < threshold] | |
| langs = [getattr(row, l) for l in closest_lang_columns[:len(dists)]] | |
| for lang in langs: | |
| lang_emb = lang_embs[iso_lookup[-1][str(lang)]] | |
| avg_emb += lang_emb | |
| avg_emb /= len(langs) # normalize | |
| lang_embs[iso_lookup[-1][str(row.target_lang)]] = avg_emb | |
| # inject language embeddings into Toucan model and save | |
| model["model"]["encoder.language_embedding.weight"] = lang_embs | |
| modified_model_path = model_path.split(".")[0] + "_zeroshot_lang_embs.pt" | |
| torch.save(model, modified_model_path) | |
| print(f"Replaced unsupervised language embeddings with zero-shot approximations.\nSaved modified model to {modified_model_path}") | |
| if __name__ == "__main__": | |
| default_model_path = os.path.join(MODELS_DIR, "ToucanTTS_Meta", "best.pt") # MODELS_DIR must be absolute path, the relative path will fail at this location | |
| default_csv_path = "distance_datasets/dataset_learned_top30.csv" | |
| parser = argparse.ArgumentParser() | |
| parser.add_argument("--model_path", type=str, default=default_model_path, help="path of the model for which the language embeddings should be modified") | |
| parser.add_argument("--dataset_path", type=str, default=default_csv_path, help="path to distance dataset CSV") | |
| parser.add_argument("--min_n_langs", type=int, default=5, help="minimum amount of languages used for averaging") | |
| parser.add_argument("--max_n_langs", type=int, default=25, help="maximum amount of languages used for averaging") | |
| parser.add_argument("--threshold_percentile", type=int, default=50, help="percentile of the furthest used languages \ | |
| used as cutoff threshold (no langs >= the threshold are used for averaging)") | |
| args = parser.parse_args() | |
| ISO_LOOKUP_PATH = "iso_lookup.json" | |
| with open(ISO_LOOKUP_PATH, "r") as f: | |
| iso_lookup = json.load(f) # iso_lookup[-1] = iso2id mapping | |
| # load language distance dataset | |
| distance_df = pd.read_csv(args.dataset_path, sep="|") | |
| approximate_and_inject_language_embeddings(model_path=args.model_path, | |
| df=distance_df, | |
| iso_lookup=iso_lookup, | |
| min_n_langs=args.min_n_langs, | |
| max_n_langs=args.max_n_langs, | |
| threshold_percentile=args.threshold_percentile) | |