voice_processing.py

import asyncio
import datetime
import logging
import os
import time
import traceback
import tempfile
from concurrent.futures import ThreadPoolExecutor

import edge_tts
import librosa
import torch
from fairseq import checkpoint_utils
import uuid

from config import Config
from lib.infer_pack.models import (
    SynthesizerTrnMs256NSFsid,
    SynthesizerTrnMs256NSFsid_nono,
    SynthesizerTrnMs768NSFsid,
    SynthesizerTrnMs768NSFsid_nono,
)
from rmvpe import RMVPE
from vc_infer_pipeline import VC

model_cache = {}


# Set logging levels
logging.getLogger("fairseq").setLevel(logging.WARNING)
logging.getLogger("numba").setLevel(logging.WARNING)
logging.getLogger("markdown_it").setLevel(logging.WARNING)
logging.getLogger("urllib3").setLevel(logging.WARNING)
logging.getLogger("matplotlib").setLevel(logging.WARNING)

limitation = os.getenv("SYSTEM") == "spaces"

config = Config()

# Edge TTS voices
tts_voice_list = asyncio.get_event_loop().run_until_complete(edge_tts.list_voices())
tts_voices = ["mn-MN-BataaNeural", "mn-MN-YesuiNeural"]

# RVC models directory
model_root = "weights"
models = [d for d in os.listdir(model_root) if os.path.isdir(f"{model_root}/{d}")]
models.sort()

def get_unique_filename(extension):
    return f"{uuid.uuid4()}.{extension}"

def model_data(model_name):
    # We will not modify this function to cache models
    pth_path = [
        f"{model_root}/{model_name}/{f}"
        for f in os.listdir(f"{model_root}/{model_name}")
        if f.endswith(".pth")
    ][0]
    print(f"Loading {pth_path}")
    cpt = torch.load(pth_path, map_location="cpu")
    tgt_sr = cpt["config"][-1]
    cpt["config"][-3] = cpt["weight"]["emb_g.weight"].shape[0]  # n_spk
    if_f0 = cpt.get("f0", 1)
    version = cpt.get("version", "v1")
    if version == "v1":
        if if_f0 == 1:
            net_g = SynthesizerTrnMs256NSFsid(*cpt["config"], is_half=config.is_half)
        else:
            net_g = SynthesizerTrnMs256NSFsid_nono(*cpt["config"])
    elif version == "v2":
        if if_f0 == 1:
            net_g = SynthesizerTrnMs768NSFsid(*cpt["config"], is_half=config.is_half)
        else:
            net_g = SynthesizerTrnMs768NSFsid_nono(*cpt["config"])
    else:
        raise ValueError("Unknown version")
    del net_g.enc_q
    net_g.load_state_dict(cpt["weight"], strict=False)
    print("Model loaded")
    net_g.eval().to(config.device)
    if config.is_half:
        net_g = net_g.half()
    else:
        net_g = net_g.float()
    vc = VC(tgt_sr, config)

    index_files = [
        f"{model_root}/{model_name}/{f}"
        for f in os.listdir(f"{model_root}/{model_name}")
        if f.endswith(".index")
    ]
    if len(index_files) == 0:
        print("No index file found")
        index_file = ""
    else:
        index_file = index_files[0]
        print(f"Index file found: {index_file}")

    return tgt_sr, net_g, vc, version, index_file, if_f0

def load_hubert():
    models, _, _ = checkpoint_utils.load_model_ensemble_and_task(
        ["hubert_base.pt"],
        suffix="",
    )
    hubert_model = models[0]
    hubert_model = hubert_model.to(config.device)
    if config.is_half:
        hubert_model = hubert_model.half()
    else:
        hubert_model = hubert_model.float()
    return hubert_model.eval()

def get_model_names():
    return [d for d in os.listdir(model_root) if os.path.isdir(f"{model_root}/{d}")]

# Initialize the global models
hubert_model = load_hubert()
rmvpe_model = RMVPE("rmvpe.pt", config.is_half, config.device)

voice_mapping = {
    "Mongolian Male": "mn-MN-BataaNeural",
    "Mongolian Female": "mn-MN-YesuiNeural"
}

# Function to run async functions in a new event loop within a thread
def run_async_in_thread(fn, *args):
    loop = asyncio.new_event_loop()
    asyncio.set_event_loop(loop)
    result = loop.run_until_complete(fn(*args))
    loop.close()
    return result

def parallel_tts(tasks):
    # Increase max_workers to better utilize CPU and GPU resources
    with ThreadPoolExecutor(max_workers=20) as executor:  # Adjust based on your server capacity
        futures = [executor.submit(run_async_in_thread, tts, *task) for task in tasks]
        results = [future.result() for future in futures]
    return results

async def tts(
    model_name,
    tts_text,
    tts_voice,
    index_rate,
    use_uploaded_voice,
    uploaded_voice,
):
    # Default values for parameters
    speed = 0  # Default speech speed
    f0_up_key = 0  # Default pitch adjustment
    f0_method = "rmvpe"  # Default pitch extraction method
    protect = 0.33  # Default protect value
    filter_radius = 3
    resample_sr = 0
    rms_mix_rate = 0.25
    edge_time = 0  # Initialize edge_time

    edge_output_filename = get_unique_filename("mp3")

    try:
        if use_uploaded_voice:
            if uploaded_voice is None:
                return "No voice file uploaded.", None, None
            
            # Process the uploaded voice file
            with tempfile.NamedTemporaryFile(delete=False, suffix=".wav") as tmp_file:
                tmp_file.write(uploaded_voice)
                uploaded_file_path = tmp_file.name

            audio, sr = librosa.load(uploaded_file_path, sr=16000, mono=True)
        else:
            # EdgeTTS processing
            if limitation and len(tts_text) > 12000:
                return (
                    f"Text characters should be at most 12000 in this huggingface space, but got {len(tts_text)} characters.",
                    None,
                    None,
                )
            
            # Invoke Edge TTS
            t0 = time.time()
            speed_str = f"+{speed}%" if speed >= 0 else f"{speed}%"
            await edge_tts.Communicate(
                tts_text, tts_voice, rate=speed_str
            ).save(edge_output_filename)
            t1 = time.time()
            edge_time = t1 - t0

            audio, sr = librosa.load(edge_output_filename, sr=16000, mono=True)

        # Common processing after loading the audio
        duration = len(audio) / sr
        print(f"Audio duration: {duration}s")
        if limitation and duration >= 20000:
            return (
                f"Audio should be less than 20 seconds in this huggingface space, but got {duration}s.",
                None,
                None,
            )

        f0_up_key = int(f0_up_key)
        # Load the model
        tgt_sr, net_g, vc, version, index_file, if_f0 = model_data(model_name)

        # Setup for RMVPE or other pitch extraction methods
        if f0_method == "rmvpe":
            vc.model_rmvpe = rmvpe_model

        # Perform voice conversion pipeline
        times = [0, 0, 0]
        audio_opt = vc.pipeline(
            hubert_model,
            net_g,
            0,
            audio,
            edge_output_filename if not use_uploaded_voice else uploaded_file_path,
            times,
            f0_up_key,
            f0_method,
            index_file,
            index_rate,
            if_f0,
            filter_radius,
            tgt_sr,
            resample_sr,
            rms_mix_rate,
            version,
            protect,
            None,
        )

        if tgt_sr != resample_sr and resample_sr >= 16000:
            tgt_sr = resample_sr
        
        info = f"Success. Time: tts: {edge_time}s, npy: {times[0]}s, f0: {times[1]}s, infer: {times[2]}s"
        print(info)
        return (
            info,
            edge_output_filename if not use_uploaded_voice else None,   
            (tgt_sr, audio_opt),
        )

    except EOFError:
        info = (
            "Output not valid. This may occur when input text and speaker do not match."
        )
        print(info)
        return info, None, None
    except Exception as e:
        traceback_info = traceback.format_exc()
        print(traceback_info)
        return str(e), None, None