modules/nllb_inference.py

from .base_interface import BaseInterface
from transformers import AutoTokenizer, AutoModelForSeq2SeqLM, pipeline
import gradio as gr
import torch
import os
from datetime import datetime

from modules.subtitle_manager import *

DEFAULT_MODEL_SIZE = "facebook/nllb-200-1.3B"
NLLB_MODELS = ["facebook/nllb-200-3.3B", "facebook/nllb-200-1.3B", "facebook/nllb-200-distilled-600M"]


class NLLBInference(BaseInterface):
    def __init__(self):
        super().__init__()
        self.default_model_size = DEFAULT_MODEL_SIZE
        self.current_model_size = None
        self.model = None
        self.tokenizer = None
        self.available_models = NLLB_MODELS
        self.available_source_langs = list(NLLB_AVAILABLE_LANGS.keys())
        self.available_target_langs = list(NLLB_AVAILABLE_LANGS.keys())
        self.device = 0 if torch.cuda.is_available() else -1
        self.pipeline = None

    def translate_text(self, text):
        result = self.pipeline(text)
        return result[0]['translation_text']

    def translate_file(self, fileobjs
                       , model_size, src_lang, tgt_lang,
                       progress=gr.Progress()):
        try:
            if model_size != self.current_model_size or self.model is None:
                print("\nInitializing NLLB Model..\n")
                progress(0, desc="Initializing NLLB Model..")
                self.current_model_size = model_size
                self.model = AutoModelForSeq2SeqLM.from_pretrained(pretrained_model_name_or_path=model_size,
                                                                   cache_dir=os.path.join("models", "NLLB"))
                self.tokenizer = AutoTokenizer.from_pretrained(pretrained_model_name_or_path=model_size,
                                                               cache_dir=os.path.join("models", "NLLB", "tokenizers"))

            src_lang = NLLB_AVAILABLE_LANGS[src_lang]
            tgt_lang = NLLB_AVAILABLE_LANGS[tgt_lang]

            self.pipeline = pipeline("translation",
                                     model=self.model,
                                     tokenizer=self.tokenizer,
                                     src_lang=src_lang,
                                     tgt_lang=tgt_lang,
                                     device=self.device)

            files_info = {}
            for fileobj in fileobjs:
                file_path = fileobj.name
                file_name, file_ext = os.path.splitext(os.path.basename(fileobj.orig_name))
                if file_ext == ".srt":
                    parsed_dicts = parse_srt(file_path=file_path)
                    total_progress = len(parsed_dicts)
                    for index, dic in enumerate(parsed_dicts):
                        progress(index / total_progress, desc="Translating..")
                        translated_text = self.translate_text(dic["sentence"])
                        dic["sentence"] = translated_text
                    subtitle = get_serialized_srt(parsed_dicts)

                    timestamp = datetime.now().strftime("%m%d%H%M%S")
                    file_name = file_name[:-9]
                    output_path = os.path.join("outputs", "translations", f"{file_name}-{timestamp}")

                    write_file(subtitle, f"{output_path}.srt")

                elif file_ext == ".vtt":
                    parsed_dicts = parse_vtt(file_path=file_path)
                    total_progress = len(parsed_dicts)
                    for index, dic in enumerate(parsed_dicts):
                        progress(index / total_progress, desc="Translating..")
                        translated_text = self.translate_text(dic["sentence"])
                        dic["sentence"] = translated_text
                    subtitle = get_serialized_vtt(parsed_dicts)

                    timestamp = datetime.now().strftime("%m%d%H%M%S")
                    file_name = file_name[:-9]
                    output_path = f"outputs/translations/{file_name}-{timestamp}"

                    write_file(subtitle, f"{output_path}.vtt")

                files_info[file_name] = subtitle

            total_result = ''
            for file_name, subtitle in files_info.items():
                total_result += '------------------------------------\n'
                total_result += f'{file_name}\n\n'
                total_result += f'{subtitle}'

            return f"Done! Subtitle is in the outputs/translation folder.\n\n{total_result}"
        except Exception as e:
            return f"Error: {str(e)}"
        finally:
            self.release_cuda_memory()
            self.remove_input_files([fileobj.name for fileobj in fileobjs])


NLLB_AVAILABLE_LANGS = {
    "Acehnese (Arabic script)": "ace_Arab",
    "Acehnese (Latin script)": "ace_Latn",
    "Mesopotamian Arabic": "acm_Arab",
    "Ta’izzi-Adeni Arabic": "acq_Arab",
    "Tunisian Arabic": "aeb_Arab",
    "Afrikaans": "afr_Latn",
    "South Levantine Arabic": "ajp_Arab",
    "Akan": "aka_Latn",
    "Amharic": "amh_Ethi",
    "North Levantine Arabic": "apc_Arab",
    "Modern Standard Arabic": "arb_Arab",
    "Modern Standard Arabic (Romanized)": "arb_Latn",
    "Najdi Arabic": "ars_Arab",
    "Moroccan Arabic": "ary_Arab",
    "Egyptian Arabic": "arz_Arab",
    "Assamese": "asm_Beng",
    "Asturian": "ast_Latn",
    "Awadhi": "awa_Deva",
    "Central Aymara": "ayr_Latn",
    "South Azerbaijani": "azb_Arab",
    "North Azerbaijani": "azj_Latn",
    "Bashkir": "bak_Cyrl",
    "Bambara": "bam_Latn",
    "Balinese": "ban_Latn",
    "Belarusian": "bel_Cyrl",
    "Bemba": "bem_Latn",
    "Bengali": "ben_Beng",
    "Bhojpuri": "bho_Deva",
    "Banjar (Arabic script)": "bjn_Arab",
    "Banjar (Latin script)": "bjn_Latn",
    "Standard Tibetan": "bod_Tibt",
    "Bosnian": "bos_Latn",
    "Buginese": "bug_Latn",
    "Bulgarian": "bul_Cyrl",
    "Catalan": "cat_Latn",
    "Cebuano": "ceb_Latn",
    "Czech": "ces_Latn",
    "Chokwe": "cjk_Latn",
    "Central Kurdish": "ckb_Arab",
    "Crimean Tatar": "crh_Latn",
    "Welsh": "cym_Latn",
    "Danish": "dan_Latn",
    "German": "deu_Latn",
    "Southwestern Dinka": "dik_Latn",
    "Dyula": "dyu_Latn",
    "Dzongkha": "dzo_Tibt",
    "Greek": "ell_Grek",
    "English": "eng_Latn",
    "Esperanto": "epo_Latn",
    "Estonian": "est_Latn",
    "Basque": "eus_Latn",
    "Ewe": "ewe_Latn",
    "Faroese": "fao_Latn",
    "Fijian": "fij_Latn",
    "Finnish": "fin_Latn",
    "Fon": "fon_Latn",
    "French": "fra_Latn",
    "Friulian": "fur_Latn",
    "Nigerian Fulfulde": "fuv_Latn",
    "Scottish Gaelic": "gla_Latn",
    "Irish": "gle_Latn",
    "Galician": "glg_Latn",
    "Guarani": "grn_Latn",
    "Gujarati": "guj_Gujr",
    "Haitian Creole": "hat_Latn",
    "Hausa": "hau_Latn",
    "Hebrew": "heb_Hebr",
    "Hindi": "hin_Deva",
    "Chhattisgarhi": "hne_Deva",
    "Croatian": "hrv_Latn",
    "Hungarian": "hun_Latn",
    "Armenian": "hye_Armn",
    "Igbo": "ibo_Latn",
    "Ilocano": "ilo_Latn",
    "Indonesian": "ind_Latn",
    "Icelandic": "isl_Latn",
    "Italian": "ita_Latn",
    "Javanese": "jav_Latn",
    "Japanese": "jpn_Jpan",
    "Kabyle": "kab_Latn",
    "Jingpho": "kac_Latn",
    "Kamba": "kam_Latn",
    "Kannada": "kan_Knda",
    "Kashmiri (Arabic script)": "kas_Arab",
    "Kashmiri (Devanagari script)": "kas_Deva",
    "Georgian": "kat_Geor",
    "Central Kanuri (Arabic script)": "knc_Arab",
    "Central Kanuri (Latin script)": "knc_Latn",
    "Kazakh": "kaz_Cyrl",
    "Kabiyè": "kbp_Latn",
    "Kabuverdianu": "kea_Latn",
    "Khmer": "khm_Khmr",
    "Kikuyu": "kik_Latn",
    "Kinyarwanda": "kin_Latn",
    "Kyrgyz": "kir_Cyrl",
    "Kimbundu": "kmb_Latn",
    "Northern Kurdish": "kmr_Latn",
    "Kikongo": "kon_Latn",
    "Korean": "kor_Hang",
    "Lao": "lao_Laoo",
    "Ligurian": "lij_Latn",
    "Limburgish": "lim_Latn",
    "Lingala": "lin_Latn",
    "Lithuanian": "lit_Latn",
    "Lombard": "lmo_Latn",
    "Latgalian": "ltg_Latn",
    "Luxembourgish": "ltz_Latn",
    "Luba-Kasai": "lua_Latn",
    "Ganda": "lug_Latn",
    "Luo": "luo_Latn",
    "Mizo": "lus_Latn",
    "Standard Latvian": "lvs_Latn",
    "Magahi": "mag_Deva",
    "Maithili": "mai_Deva",
    "Malayalam": "mal_Mlym",
    "Marathi": "mar_Deva",
    "Minangkabau (Arabic script)": "min_Arab",
    "Minangkabau (Latin script)": "min_Latn",
    "Macedonian": "mkd_Cyrl",
    "Plateau Malagasy": "plt_Latn",
    "Maltese": "mlt_Latn",
    "Meitei (Bengali script)": "mni_Beng",
    "Halh Mongolian": "khk_Cyrl",
    "Mossi": "mos_Latn",
    "Maori": "mri_Latn",
    "Burmese": "mya_Mymr",
    "Dutch": "nld_Latn",
    "Norwegian Nynorsk": "nno_Latn",
    "Norwegian Bokmål": "nob_Latn",
    "Nepali": "npi_Deva",
    "Northern Sotho": "nso_Latn",
    "Nuer": "nus_Latn",
    "Nyanja": "nya_Latn",
    "Occitan": "oci_Latn",
    "West Central Oromo": "gaz_Latn",
    "Odia": "ory_Orya",
    "Pangasinan": "pag_Latn",
    "Eastern Panjabi": "pan_Guru",
    "Papiamento": "pap_Latn",
    "Western Persian": "pes_Arab",
    "Polish": "pol_Latn",
    "Portuguese": "por_Latn",
    "Dari": "prs_Arab",
    "Southern Pashto": "pbt_Arab",
    "Ayacucho Quechua": "quy_Latn",
    "Romanian": "ron_Latn",
    "Rundi": "run_Latn",
    "Russian": "rus_Cyrl",
    "Sango": "sag_Latn",
    "Sanskrit": "san_Deva",
    "Santali": "sat_Olck",
    "Sicilian": "scn_Latn",
    "Shan": "shn_Mymr",
    "Sinhala": "sin_Sinh",
    "Slovak": "slk_Latn",
    "Slovenian": "slv_Latn",
    "Samoan": "smo_Latn",
    "Shona": "sna_Latn",
    "Sindhi": "snd_Arab",
    "Somali": "som_Latn",
    "Southern Sotho": "sot_Latn",
    "Spanish": "spa_Latn",
    "Tosk Albanian": "als_Latn",
    "Sardinian": "srd_Latn",
    "Serbian": "srp_Cyrl",
    "Swati": "ssw_Latn",
    "Sundanese": "sun_Latn",
    "Swedish": "swe_Latn",
    "Swahili": "swh_Latn",
    "Silesian": "szl_Latn",
    "Tamil": "tam_Taml",
    "Tatar": "tat_Cyrl",
    "Telugu": "tel_Telu",
    "Tajik": "tgk_Cyrl",
    "Tagalog": "tgl_Latn",
    "Thai": "tha_Thai",
    "Tigrinya": "tir_Ethi",
    "Tamasheq (Latin script)": "taq_Latn",
    "Tamasheq (Tifinagh script)": "taq_Tfng",
    "Tok Pisin": "tpi_Latn",
    "Tswana": "tsn_Latn",
    "Tsonga": "tso_Latn",
    "Turkmen": "tuk_Latn",
    "Tumbuka": "tum_Latn",
    "Turkish": "tur_Latn",
    "Twi": "twi_Latn",
    "Central Atlas Tamazight": "tzm_Tfng",
    "Uyghur": "uig_Arab",
    "Ukrainian": "ukr_Cyrl",
    "Umbundu": "umb_Latn",
    "Urdu": "urd_Arab",
    "Northern Uzbek": "uzn_Latn",
    "Venetian": "vec_Latn",
    "Vietnamese": "vie_Latn",
    "Waray": "war_Latn",
    "Wolof": "wol_Latn",
    "Xhosa": "xho_Latn",
    "Eastern Yiddish": "ydd_Hebr",
    "Yoruba": "yor_Latn",
    "Yue Chinese": "yue_Hant",
    "Chinese (Simplified)": "zho_Hans",
    "Chinese (Traditional)": "zho_Hant",
    "Standard Malay": "zsm_Latn",
    "Zulu": "zul_Latn",
}