infer/lib/uvr5_pack/utils.py

import numpy as np
import torch
from tqdm import tqdm


def make_padding(width, cropsize, offset):
    left = offset
    roi_size = cropsize - left * 2
    if roi_size == 0:
        roi_size = cropsize
    right = roi_size - (width % roi_size) + left

    return left, right, roi_size


def inference(X_spec, device, model, aggressiveness, data):
    """
    data ： dic configs
    """

    def _execute(
        X_mag_pad, roi_size, n_window, device, model, aggressiveness, is_half=True
    ):
        model.eval()
        with torch.no_grad():
            preds = []

            iterations = [n_window]

            total_iterations = sum(iterations)
            for i in tqdm(range(n_window)):
                start = i * roi_size
                X_mag_window = X_mag_pad[
                    None, :, :, start : start + data["window_size"]
                ]
                X_mag_window = torch.from_numpy(X_mag_window)
                if is_half:
                    X_mag_window = X_mag_window.half()
                X_mag_window = X_mag_window.to(device)

                pred = model.predict(X_mag_window, aggressiveness)

                pred = pred.detach().cpu().numpy()
                preds.append(pred[0])

            pred = np.concatenate(preds, axis=2)
        return pred

    def preprocess(X_spec):
        X_mag = np.abs(X_spec)
        X_phase = np.angle(X_spec)

        return X_mag, X_phase

    X_mag, X_phase = preprocess(X_spec)

    coef = X_mag.max()
    X_mag_pre = X_mag / coef

    n_frame = X_mag_pre.shape[2]
    pad_l, pad_r, roi_size = make_padding(n_frame, data["window_size"], model.offset)
    n_window = int(np.ceil(n_frame / roi_size))

    X_mag_pad = np.pad(X_mag_pre, ((0, 0), (0, 0), (pad_l, pad_r)), mode="constant")

    if list(model.state_dict().values())[0].dtype == torch.float16:
        is_half = True
    else:
        is_half = False
    pred = _execute(
        X_mag_pad, roi_size, n_window, device, model, aggressiveness, is_half
    )
    pred = pred[:, :, :n_frame]

    if data["tta"]:
        pad_l += roi_size // 2
        pad_r += roi_size // 2
        n_window += 1

        X_mag_pad = np.pad(X_mag_pre, ((0, 0), (0, 0), (pad_l, pad_r)), mode="constant")

        pred_tta = _execute(
            X_mag_pad, roi_size, n_window, device, model, aggressiveness, is_half
        )
        pred_tta = pred_tta[:, :, roi_size // 2 :]
        pred_tta = pred_tta[:, :, :n_frame]

        return (pred + pred_tta) * 0.5 * coef, X_mag, np.exp(1.0j * X_phase)
    else:
        return pred * coef, X_mag, np.exp(1.0j * X_phase)