flandre/flandre/utils/RfMat.py

import inspect
from pathlib import Path

import numpy as np

import cv2
import scipy
import scipy.signal
# from cupyx.scipy.fft import dctn, idctn
from scipy.stats import norm as norms

from flandre.utils.RfFrame import RfFrame, RfFrameFile, RfFrameMemory
from flandre.utils.RfMeta import RfFrameMeta, RfSequenceMeta


def hsv_to_rgb(hsv):
    """
    Convert HSV values to RGB.

    Parameters
    ----------
    hsv : (..., 3) array-like
       All values assumed to be in range [0, 1]

    Returns
    -------
    (..., 3) `~numpy.ndarray`
       Colors converted to RGB values in range [0, 1]
    """
    hsv = np.asarray(hsv)

    # check length of the last dimension, should be _some_ sort of rgb
    if hsv.shape[-1] != 3:
        raise ValueError("Last dimension of input array must be 3; "
                         f"shape {hsv.shape} was found.")

    in_shape = hsv.shape
    hsv = np.array(
        hsv, copy=False,
        dtype=np.promote_types(hsv.dtype, np.float32),  # Don't work on ints.
        ndmin=2,  # In case input was 1D.
    )

    h = hsv[..., 0]
    s = hsv[..., 1]
    v = hsv[..., 2]

    r = np.empty_like(h)
    g = np.empty_like(h)
    b = np.empty_like(h)

    i = (h * 6.0).astype(int)
    f = (h * 6.0) - i
    p = v * (1.0 - s)
    q = v * (1.0 - s * f)
    t = v * (1.0 - s * (1.0 - f))

    idx = i % 6 == 0
    r[idx] = v[idx]
    g[idx] = t[idx]
    b[idx] = p[idx]
    # #
    idx = i == 1
    r[idx] = q[idx]
    g[idx] = v[idx]
    b[idx] = p[idx]
    #
    idx = i == 2
    r[idx] = p[idx]
    g[idx] = v[idx]
    b[idx] = t[idx]

    idx = i == 3
    r[idx] = p[idx]
    g[idx] = q[idx]
    b[idx] = v[idx]

    idx = i == 4
    r[idx] = t[idx]
    g[idx] = p[idx]
    b[idx] = v[idx]

    idx = i == 5
    r[idx] = v[idx]
    g[idx] = p[idx]
    b[idx] = q[idx]

    idx = s == 0
    r[idx] = v[idx]
    g[idx] = v[idx]
    b[idx] = v[idx]

    rgb = np.stack([r, g, b], axis=-1)

    return rgb.reshape(in_shape)


def bypass(f):
    def wrapper(self, *args, **kwargs):
        if 'cond' not in kwargs:
            return f(self, *args, **kwargs)
        if kwargs['cond']:
            del kwargs['cond']
            return f(self, *args, **kwargs)
        else:
            return self

    return wrapper


def bypassClass(original_class):
    for name, f in inspect.getmembers(original_class, inspect.isfunction):
        setattr(original_class, name, bypass(f))
    return original_class


@bypassClass
class RfMat:
    @staticmethod
    def from_rf_frame(frame: RfFrame, device='cpu'):
        if isinstance(frame, RfFrameFile):
            seq_meta = frame.seq.meta
        elif isinstance(frame, RfFrameMemory):
            seq_meta = frame.seq_meta
        else:
            raise NotImplementedError()
        if seq_meta.prod() != frame.__bytes__().__len__() // 2:
            return None
        m = np.frombuffer(frame.__bytes__(), dtype=np.int16).reshape(seq_meta.shape).copy()
        if device == 'gpu':
            import cupy as cp
            m = cp.asarray(m)
        return RfMat(m, frame.meta, seq_meta)

    def __init__(self,
                 data: np.ndarray,
                 frame_meta: RfFrameMeta = None,
                 seq_meta: RfSequenceMeta = None,
                 ):
        self.m = data
        self.cv = False
        self.frame_meta = frame_meta
        self.seq_meta = seq_meta
        if isinstance(data, np.ndarray):
            self.device = 'cpu'
        elif type(data).__module__ == 'cupy' and type(data).__name__ == 'ndarray':
            self.device = 'gpu'
        else:
            raise NotImplementedError

    def call(self, f, *args, **kwargs):
        return self.copy(f(self.m, *args, **kwargs))

    def apply(self, f, *args, **kwargs):
        f(self.m, *args, **kwargs)
        return self

    def copy(self, data=None):
        if data is None:
            return RfMat(self.m.copy(), self.frame_meta, self.seq_meta)
        return RfMat(data, self.frame_meta, self.seq_meta)

    @property
    def duration(self):
        return self.m.shape[1]

    @property
    def w(self):
        return self.m.shape[1]

    @property
    def h(self):
        return self.m.shape[0]

    @property
    def p(self):
        if self.device == 'cpu':
            return np
        import cupy as cp
        return cp

    def __bytes__(self):
        return self.m.tobytes()

    def init_cv(self):
        cv2.namedWindow('image')
        self.cv = True

    def norm(self):
        m = self.m.astype(self.p.float32)
        m -= m.min()
        mmax = m.max()
        if mmax == 0:
            return self.copy(self.p.zeros_like(m))
        m /= mmax
        return self.copy(m)

    def grey(self):
        m = self.norm().m
        return self.copy((m * 255).astype(self.p.uint8))

    def pseudo_color(self):
        m = self.norm().m * 0.7
        p = self.p
        h = m
        s = p.zeros_like(h) + 1
        v = p.zeros_like(h) + 1
        hsv = p.stack((h, s, v), axis=2)
        if self.device == 'gpu':
            rgb = hsv_to_rgb(hsv.get())
        else:
            rgb = hsv_to_rgb(hsv)
        return self.copy((rgb * 255).astype(np.uint8))

    def cpu(self):
        if self.device == 'cpu':
            return self
        return self.copy(self.m.get())

    def crop(self, t_start: int, t_end: int):
        ts = sorted([0, t_start, self.duration])[1]
        te = sorted([ts, t_end, self.duration])[1]
        return self.copy(self.m[:, ts:te])

    def crop_center(self, center: float, width: float):
        mmin = max(0, int(center - width / 2))
        mmax = min(self.duration, int(center + width / 2))

        mmin = min(mmin, self.duration - width)
        mmax = max(mmax, width)

        return self.crop(mmin, mmax)

    def watermark(self, watermark=None):
        assert self.m.dtype == np.uint8
        canvas = np.zeros(self.m.shape, dtype=np.uint8)
        ccp = self.copy()

        line1 = ''
        line2 = ''
        if watermark is not None:
            line1 = watermark
        else:
            if self.frame_meta is not None:
                line1 = self.frame_meta.name
            if self.seq_meta is not None:
                line2 = self.seq_meta.name
        if canvas.shape.__len__() == 2:
            color1 = (255,)
            color2 = (128,)
        elif canvas.shape[2] == 3:
            color1 = (255, 255, 255)
            color2 = (128, 128, 128)
        else:
            raise NotImplementedError()
        fontsize = 2
        cv2.putText(canvas, line1, (0, 60), cv2.FONT_HERSHEY_PLAIN, fontsize, color1, 8)
        cv2.putText(canvas, line1, (0, 60), cv2.FONT_HERSHEY_PLAIN, fontsize, color2, 4)

        cv2.putText(canvas, line2, (0, 120), cv2.FONT_HERSHEY_PLAIN, fontsize, color1, 8)
        cv2.putText(canvas, line2, (0, 120), cv2.FONT_HERSHEY_PLAIN, fontsize, color2, 4)

        if canvas.shape.__len__() == 2:
            ccp.m[canvas == 255] = 255
            ccp.m[canvas == 128] = 0
        elif canvas.shape[2] == 3:
            ccp.m[canvas[:, :] == 255] = 255
            ccp.m[canvas[:, :] == 128] = 0
        else:
            raise NotImplementedError()
        return ccp

    def show(self, shape=None, watermark=None):
        if not self.cv:
            self.init_cv()
        cv2.imshow('image', self
                   .grey()
                   .cpu()
                   .resize(shape, bypass=shape is None)
                   .watermark(watermark).m
                   )
        return cv2.waitKey(0)

    def info(self):
        print(f'shape: {self.m.shape},device: {self.device}')
        print(self.frame_meta)
        print(self.seq_meta)
        return self

    def resize(self, shape):
        if self.device == 'cpu':
            return self.copy(cv2.resize(self.m, shape))
        raise NotImplementedError()

    def rotate90(self):
        return self.copy(self.p.rot90(self.m, k=3))

    def dct(self, mmin, mmax):
        dct_ = scipy.fft.dct
        idct = scipy.fft.idct
        if self.device == 'gpu':
            import cupyx.scipy.fft
            dct_ = cupyx.scipy.fft.dct
            idct = cupyx.scipy.fft.idct
        m_dct = dct_(self.m)
        if self.seq_meta.d() == 2:
            m_dct[:, mmax:] = 0
            m_dct[:, :mmin] = 0
        elif self.seq_meta.d() == 3:
            m_dct[:, :, mmax:] = 0
            m_dct[:, :, :mmin] = 0
        else:
            raise NotImplementedError()
        return self.copy(idct(m_dct))

    def dct_center(self, center, bandwidth):
        mmin = max(0, int(center - bandwidth / 2))
        mmax = min(self.duration, int(center + bandwidth / 2))
        return self.dct(mmin, mmax)

    def argrelextrema(self, axis=1):
        arg = scipy.signal.argrelextrema
        m = self.m
        p = self.p
        if self.device == 'gpu':
            import cupyx.scipy.signal
            arg = cupyx.scipy.signal.argrelextrema
        rm = p.zeros_like(m)
        indies1 = arg(m, p.greater, axis=axis)
        bl = p.zeros_like(m, dtype=p.bool_)
        indies2 = arg(m, p.less, axis=axis)
        bl2 = p.zeros_like(m, dtype=p.bool_)
        bl[indies1] = True
        bl2[indies2] = True
        i1 = bl & (m > 0)
        i2 = bl2 & (m < 0)
        idx = i1 | i2
        rm[idx] = m[idx].__abs__()
        return self.copy(rm)

    def conv_guass(self, b=0.01, axis=1):
        cv = scipy.ndimage.convolve1d
        m = self.m
        p = self.p
        if self.device == 'gpu':
            import cupyx.scipy.ndimage
            cv = cupyx.scipy.ndimage.convolve1d
        rv = norms(loc=0, scale=b)
        x2 = np.arange(-1, 1.1, 0.1)
        w = rv.pdf(x2)
        if self.device == 'gpu':
            w = p.asarray(w)
        rm = cv(m, w, axis=axis)
        return self.copy(rm)

    def time_gain_compensation_linear_float(self, scale: float, start: int = 0):
        h = self.m.shape[-1]
        addend = self.p.zeros((1, h), dtype=self.p.float32)
        addend[:, start:] = (self.p.arange(h - start) * scale) + 1
        return self.copy(self.m * addend)

    def time_gain_compensation_linear(self, scale: float, start: int = 0):
        self.m = self.m.astype(np.float32)
        h = self.m.shape[-1]
        addend = self.p.zeros((1, h), dtype=np.int64)
        addend[:, start:] = self.p.arange(h - start) * scale
        self.m[:, start:] *= addend
        s2 = self.m[:, h - 500:]
        m1 = self.m[:, h - 500:].max()
        m2 = m1 * scale
        s2[s2 > m2] = m2
        self.m[:, h - 500:] = s2 * (1 / scale)
        return self

    def time_gain_compensation(self, scales: list[float]):
        self.m = self.m.astype(np.float32)
        h = self.m.shape[-1]
        block = h // scales.__len__()
        ssss = 0
        mmax = self.m.max()
        for scale in scales:
            s2 = self.m[:, ssss:ssss + block]
            new_max = mmax * scale
            s2[s2 > new_max] = new_max
            self.m[:, ssss:ssss + block] = s2 * (mmax / new_max)
            ssss += block
        return self

    def time_gain_compensation_global(self, scale: float):
        self.m = self.m.astype(np.float32)
        h = self.m.shape[-1]
        mmax = self.m.max()
        s2 = self.m
        new_max = mmax * scale
        s2[s2 > new_max] = new_max
        self.m = s2 * (mmax / new_max)
        return self

    def time_gain_compensation_linear_max(self, scale: float, mmax: int | None = None, start: int = 0):
        if scale == 0:
            return self
        if mmax is None:
            mmax = self.m.max()
        h = self.m.shape[-1]
        self.m = self.m.astype(np.float64)
        mmax_arr = self.p.zeros(h) + mmax
        mmax_arr[start:] -= self.p.arange(h - start) * scale
        for i in range(h):
            # a[1, a[1, :] > 99] = 99
            self.m[self.m[:, i] > mmax_arr[i], i] = mmax_arr[i]
            self.m[:, i] *= (mmax / mmax_arr[i])
        self.m[self.m > mmax] = mmax
        self.m = self.m.astype(np.int64)
        return self

    def jupyter(self, figsize=(40, 20), aspect=None):
        from matplotlib import pyplot as plt
        plt.figure(figsize=figsize)
        plt.imshow(self.m, cmap='grey', aspect=aspect)

    def png(self, path: Path, color=(255, 0, 0), pre=0):
        canvas = np.zeros((self.h, self.w, 4), dtype=np.uint8)
        canvas[:, :, 0:3] = color
        canvas[:, :, 3] = self.grey().cpu().m[:, :]
        canvas[:pre, :, 3] = 0
        cv2.imwrite(str(path), canvas)


if __name__ == '__main__':
    cp.zeros((1, 2, 3)) + 1