# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import re import sys import unittest import numpy as np from numpy import fft from numpy.lib.stride_tricks import as_strided import paddle import scipy.signal paddle.set_default_dtype('float64') DEVICES = [paddle.CPUPlace()] if paddle.is_compiled_with_cuda(): DEVICES.append(paddle.CUDAPlace(0)) TEST_CASE_NAME = 'test_case' # Constrain STFT block sizes to 256 KB MAX_MEM_BLOCK = 2**8 * 2**10 def fix_length(data, size, axis=-1, **kwargs): kwargs.setdefault("mode", "constant") n = data.shape[axis] if n > size: slices = [slice(None)] * data.ndim slices[axis] = slice(0, size) return data[tuple(slices)] elif n < size: lengths = [(0, 0)] * data.ndim lengths[axis] = (0, size - n) return np.pad(data, lengths, **kwargs) return data def tiny(x): # Make sure we have an array view x = np.asarray(x) # Only floating types generate a tiny if np.issubdtype(x.dtype, np.floating) or np.issubdtype(x.dtype, np.complexfloating): dtype = x.dtype else: dtype = np.float32 return np.finfo(dtype).tiny def normalize(S, norm=np.inf, axis=0, threshold=None, fill=None): # Avoid div-by-zero if threshold is None: threshold = tiny(S) elif threshold <= 0: raise Exception("threshold={} must be strictly " "positive".format(threshold)) if fill not in [None, False, True]: raise Exception("fill={} must be None or boolean".format(fill)) if not np.all(np.isfinite(S)): raise Exception("Input must be finite") # All norms only depend on magnitude, let's do that first mag = np.abs(S).astype(np.float) # For max/min norms, filling with 1 works fill_norm = 1 if norm == np.inf: length = np.max(mag, axis=axis, keepdims=True) elif norm == -np.inf: length = np.min(mag, axis=axis, keepdims=True) elif norm == 0: if fill is True: raise Exception("Cannot normalize with norm=0 and fill=True") length = np.sum(mag > 0, axis=axis, keepdims=True, dtype=mag.dtype) elif np.issubdtype(type(norm), np.number) and norm > 0: length = np.sum(mag**norm, axis=axis, keepdims=True)**(1.0 / norm) if axis is None: fill_norm = mag.size**(-1.0 / norm) else: fill_norm = mag.shape[axis]**(-1.0 / norm) elif norm is None: return S else: raise Exception("Unsupported norm: {}".format(repr(norm))) # indices where norm is below the threshold small_idx = length < threshold Snorm = np.empty_like(S) if fill is None: # Leave small indices un-normalized length[small_idx] = 1.0 Snorm[:] = S / length elif fill: # If we have a non-zero fill value, we locate those entries by # doing a nan-divide. # If S was finite, then length is finite (except for small positions) length[small_idx] = np.nan Snorm[:] = S / length Snorm[np.isnan(Snorm)] = fill_norm else: # Set small values to zero by doing an inf-divide. # This is safe (by IEEE-754) as long as S is finite. length[small_idx] = np.inf Snorm[:] = S / length return Snorm def __window_ss_fill(x, win_sq, n_frames, hop_length): # pragma: no cover """Helper function for window sum-square calculation.""" n = len(x) n_fft = len(win_sq) for i in range(n_frames): sample = i * hop_length x[sample:min(n, sample + n_fft)] += win_sq[:max(0, min(n_fft, n - sample))] def window_sumsquare( window, n_frames, hop_length=512, win_length=None, n_fft=2048, dtype=np.float32, norm=None, ): if win_length is None: win_length = n_fft n = n_fft + hop_length * (n_frames - 1) x = np.zeros(n, dtype=dtype) # Compute the squared window at the desired length win_sq = get_window(window, win_length) win_sq = normalize(win_sq, norm=norm)**2 win_sq = pad_center(win_sq, n_fft) # Fill the envelope __window_ss_fill(x, win_sq, n_frames, hop_length) return x def dtype_c2r(d, default=np.float32): mapping = { np.dtype(np.complex64): np.float32, np.dtype(np.complex128): np.float64, } # If we're given a real type already, return it dt = np.dtype(d) if dt.kind == "f": return dt # Otherwise, try to map the dtype. # If no match is found, return the default. return np.dtype(mapping.get(np.dtype(d), default)) def dtype_r2c(d, default=np.complex64): mapping = { np.dtype(np.float32): np.complex64, np.dtype(np.float64): np.complex128, } # If we're given a complex type already, return it dt = np.dtype(d) if dt.kind == "c": return dt # Otherwise, try to map the dtype. # If no match is found, return the default. return np.dtype(mapping.get(dt, default)) def frame(x, frame_length, hop_length, axis=-1): if not isinstance(x, np.ndarray): raise Exception("Input must be of type numpy.ndarray, " "given type(x)={}".format(type(x))) if x.shape[axis] < frame_length: raise Exception("Input is too short (n={:d})" " for frame_length={:d}".format(x.shape[axis], frame_length)) if hop_length < 1: raise Exception("Invalid hop_length: {:d}".format(hop_length)) if axis == -1 and not x.flags["F_CONTIGUOUS"]: print("librosa.util.frame called with axis={} " "on a non-contiguous input. This will result in a copy.".format( axis)) x = np.asfortranarray(x) elif axis == 0 and not x.flags["C_CONTIGUOUS"]: print("librosa.util.frame called with axis={} " "on a non-contiguous input. This will result in a copy.".format( axis)) x = np.ascontiguousarray(x) n_frames = 1 + (x.shape[axis] - frame_length) // hop_length strides = np.asarray(x.strides) new_stride = np.prod(strides[strides > 0] // x.itemsize) * x.itemsize if axis == -1: shape = list(x.shape)[:-1] + [frame_length, n_frames] strides = list(strides) + [hop_length * new_stride] elif axis == 0: shape = [n_frames, frame_length] + list(x.shape)[1:] strides = [hop_length * new_stride] + list(strides) else: raise Exception("Frame axis={} must be either 0 or -1".format(axis)) return as_strided(x, shape=shape, strides=strides) def pad_center(data, size, axis=-1, **kwargs): kwargs.setdefault("mode", "constant") n = data.shape[axis] lpad = int((size - n) // 2) lengths = [(0, 0)] * data.ndim lengths[axis] = (lpad, int(size - n - lpad)) if lpad < 0: raise Exception(("Target size ({:d}) must be " "at least input size ({:d})").format(size, n)) return np.pad(data, lengths, **kwargs) def get_window(window, Nx, fftbins=True): if callable(window): return window(Nx) elif isinstance(window, (str, tuple)) or np.isscalar(window): # TODO: if we add custom window functions in librosa, call them here return scipy.signal.get_window(window, Nx, fftbins=fftbins) elif isinstance(window, (np.ndarray, list)): if len(window) == Nx: return np.asarray(window) raise Exception("Window size mismatch: " "{:d} != {:d}".format(len(window), Nx)) else: raise Exception("Invalid window specification: {}".format(window)) def __overlap_add(y, ytmp, hop_length): # numba-accelerated overlap add for inverse stft # y is the pre-allocated output buffer # ytmp is the windowed inverse-stft frames # hop_length is the hop-length of the STFT analysis n_fft = ytmp.shape[0] for frame in range(ytmp.shape[1]): sample = frame * hop_length y[sample:(sample + n_fft)] += ytmp[:, frame] def stft(x, n_fft=2048, hop_length=None, win_length=None, window="hann", center=True, pad_mode="reflect"): y = x input_rank = len(y.shape) if input_rank == 2: assert y.shape[0] == 1 # Only 1d input supported in librosa y = y.squeeze(0) dtype = None # By default, use the entire frame if win_length is None: win_length = n_fft # Set the default hop, if it's not already specified if hop_length is None: hop_length = int(win_length // 4) fft_window = get_window(window, win_length, fftbins=True) # Pad the window out to n_fft size fft_window = pad_center(fft_window, n_fft) # Reshape so that the window can be broadcast fft_window = fft_window.reshape((-1, 1)) # Pad the time series so that frames are centered if center: if n_fft > y.shape[-1]: print("n_fft={} is too small for input signal of length={}".format( n_fft, y.shape[-1])) y = np.pad(y, int(n_fft // 2), mode=pad_mode) elif n_fft > y.shape[-1]: raise Exception("n_fft={} is too large for input signal of length={}". format(n_fft, y.shape[-1])) # Window the time series. y_frames = frame(y, frame_length=n_fft, hop_length=hop_length) if dtype is None: dtype = dtype_r2c(y.dtype) # Pre-allocate the STFT matrix stft_matrix = np.empty( (int(1 + n_fft // 2), y_frames.shape[1]), dtype=dtype, order="F") # how many columns can we fit within MAX_MEM_BLOCK? n_columns = MAX_MEM_BLOCK // (stft_matrix.shape[0] * stft_matrix.itemsize) n_columns = max(n_columns, 1) for bl_s in range(0, stft_matrix.shape[1], n_columns): bl_t = min(bl_s + n_columns, stft_matrix.shape[1]) stft_matrix[:, bl_s:bl_t] = fft.rfft( fft_window * y_frames[:, bl_s:bl_t], axis=0) if input_rank == 2: stft_matrix = np.expand_dims(stft_matrix, 0) return stft_matrix def istft( x, hop_length=None, win_length=None, window="hann", center=True, length=None, ): stft_matrix = x input_rank = len(stft_matrix.shape) if input_rank == 3: assert stft_matrix.shape[0] == 1 # Only 2d input supported in librosa stft_matrix = stft_matrix.squeeze(0) dtype = None n_fft = 2 * (stft_matrix.shape[0] - 1) # By default, use the entire frame if win_length is None: win_length = n_fft # Set the default hop, if it's not already specified if hop_length is None: hop_length = int(win_length // 4) ifft_window = get_window(window, win_length, fftbins=True) # Pad out to match n_fft, and add a broadcasting axis ifft_window = pad_center(ifft_window, n_fft)[:, np.newaxis] # For efficiency, trim STFT frames according to signal length if available if length: if center: padded_length = length + int(n_fft) else: padded_length = length n_frames = min(stft_matrix.shape[1], int(np.ceil(padded_length / hop_length))) else: n_frames = stft_matrix.shape[1] expected_signal_len = n_fft + hop_length * (n_frames - 1) if dtype is None: dtype = dtype_c2r(stft_matrix.dtype) y = np.zeros(expected_signal_len, dtype=dtype) n_columns = MAX_MEM_BLOCK // (stft_matrix.shape[0] * stft_matrix.itemsize) n_columns = min(n_columns, 1) frame = 0 for bl_s in range(0, n_frames, n_columns): bl_t = min(bl_s + n_columns, n_frames) # invert the block and apply the window function ytmp = ifft_window * fft.irfft(stft_matrix[:, bl_s:bl_t], axis=0) # Overlap-add the istft block starting at the i'th frame __overlap_add(y[frame * hop_length:], ytmp, hop_length) frame += bl_t - bl_s # Normalize by sum of squared window ifft_window_sum = window_sumsquare( window, n_frames, win_length=win_length, n_fft=n_fft, hop_length=hop_length, dtype=dtype, ) approx_nonzero_indices = ifft_window_sum > tiny(ifft_window_sum) y[approx_nonzero_indices] /= ifft_window_sum[approx_nonzero_indices] if length is None: # If we don't need to control length, just do the usual center trimming # to eliminate padded data if center: y = y[int(n_fft // 2):-int(n_fft // 2)] else: if center: # If we're centering, crop off the first n_fft//2 samples # and then trim/pad to the target length. # We don't trim the end here, so that if the signal is zero-padded # to a longer duration, the decay is smooth by windowing start = int(n_fft // 2) else: # If we're not centering, start at 0 and trim/pad as necessary start = 0 y = fix_length(y[start:], length) if input_rank == 3: y = np.expand_dims(y, 0) return y def frame_for_api_test(x, frame_length, hop_length, axis=-1): if axis == -1 and not x.flags["C_CONTIGUOUS"]: x = np.ascontiguousarray(x) elif axis == 0 and not x.flags["F_CONTIGUOUS"]: x = np.asfortranarray(x) n_frames = 1 + (x.shape[axis] - frame_length) // hop_length strides = np.asarray(x.strides) if axis == -1: shape = list(x.shape)[:-1] + [frame_length, n_frames] strides = list(strides) + [hop_length * x.itemsize] elif axis == 0: shape = [n_frames, frame_length] + list(x.shape)[1:] strides = [hop_length * x.itemsize] + list(strides) else: raise ValueError("Frame axis={} must be either 0 or -1".format(axis)) return as_strided(x, shape=shape, strides=strides) def overlap_add_for_api_test(x, hop_length, axis=-1): assert axis in [0, -1], 'axis should be 0/-1.' assert len(x.shape) >= 2, 'Input dims shoulb be >= 2.' squeeze_output = False if len(x.shape) == 2: squeeze_output = True dim = 0 if axis == -1 else -1 x = np.expand_dims(x, dim) # batch n_frames = x.shape[axis] frame_length = x.shape[1] if axis == 0 else x.shape[-2] # Assure no gaps between frames. assert 0 < hop_length <= frame_length, \ f'hop_length should be in (0, frame_length({frame_length})], but got {hop_length}.' seq_length = (n_frames - 1) * hop_length + frame_length reshape_output = False if len(x.shape) > 3: reshape_output = True if axis == 0: target_shape = [seq_length] + list(x.shape[2:]) x = x.reshape(n_frames, frame_length, np.product(x.shape[2:])) else: target_shape = list(x.shape[:-2]) + [seq_length] x = x.reshape(np.product(x.shape[:-2]), frame_length, n_frames) if axis == 0: x = x.transpose((2, 1, 0)) y = np.zeros(shape=[np.product(x.shape[:-2]), seq_length], dtype=x.dtype) for i in range(x.shape[0]): for frame in range(x.shape[-1]): sample = frame * hop_length y[i, sample:sample + frame_length] += x[i, :, frame] if axis == 0: y = y.transpose((1, 0)) if reshape_output: y = y.reshape(target_shape) if squeeze_output: y = y.squeeze(-1) if axis == 0 else y.squeeze(0) return y def place(devices, key='place'): def decorate(cls): module = sys.modules[cls.__module__].__dict__ raw_classes = { k: v for k, v in module.items() if k.startswith(cls.__name__) } for raw_name, raw_cls in raw_classes.items(): for d in devices: test_cls = dict(raw_cls.__dict__) test_cls.update({key: d}) new_name = raw_name + '.' + d.__class__.__name__ module[new_name] = type(new_name, (raw_cls, ), test_cls) del module[raw_name] return cls return decorate def setUpModule(): global rtol global atol # All test case will use float64 for compare percision, refs: # https://github.com/PaddlePaddle/Paddle/wiki/Upgrade-OP-Precision-to-Float64 rtol = { 'float32': 1e-06, 'float64': 1e-7, 'complex64': 1e-06, 'complex128': 1e-7, } atol = { 'float32': 0.0, 'float64': 0.0, 'complex64': 0.0, 'complex128': 0.0, } def tearDownModule(): pass def rand_x(dims=1, dtype='float64', min_dim_len=1, max_dim_len=10, shape=None, complex=False): if shape is None: shape = [ np.random.randint(min_dim_len, max_dim_len) for i in range(dims) ] if complex: return np.random.randn(*shape).astype(dtype) + 1.j * np.random.randn( *shape).astype(dtype) else: return np.random.randn(*shape).astype(dtype) def parameterize(attrs, input_values=None): if isinstance(attrs, str): attrs = [attrs] input_dicts = (attrs if input_values is None else [dict(zip(attrs, vals)) for vals in input_values]) def decorator(base_class): test_class_module = sys.modules[base_class.__module__].__dict__ for idx, input_dict in enumerate(input_dicts): test_class_dict = dict(base_class.__dict__) test_class_dict.update(input_dict) name = class_name(base_class, idx, input_dict) test_class_module[name] = type(name, (base_class, ), test_class_dict) for method_name in list(base_class.__dict__): if method_name.startswith("test"): delattr(base_class, method_name) return base_class return decorator def class_name(cls, num, params_dict): suffix = to_safe_name( next((v for v in params_dict.values() if isinstance(v, str)), "")) if TEST_CASE_NAME in params_dict: suffix = to_safe_name(params_dict["test_case"]) return "{}_{}{}".format(cls.__name__, num, suffix and "_" + suffix) def to_safe_name(s): return str(re.sub("[^a-zA-Z0-9_]+", "_", s)) # yapf: disable @place(DEVICES) @parameterize( (TEST_CASE_NAME, 'x', 'frame_length', 'hop_length', 'axis'), [ ('test_1d_input1', rand_x(1, np.float64, shape=[150]), 50, 15, 0), ('test_1d_input2', rand_x(1, np.float64, shape=[150]), 50, 15, -1), ('test_2d_input1', rand_x(2, np.float64, shape=[150, 8]), 50, 15, 0), ('test_2d_input2', rand_x(2, np.float64, shape=[8, 150]), 50, 15, -1), ('test_3d_input1', rand_x(3, np.float64, shape=[150, 4, 2]), 50, 15, 0), ('test_3d_input2', rand_x(3, np.float64, shape=[4, 2, 150]), 50, 15, -1), ]) class TestFrame(unittest.TestCase): def test_frame(self): self.assertTrue( np.allclose( frame_for_api_test(self.x, self.frame_length, self.hop_length, self.axis), paddle.signal.frame( paddle.to_tensor(self.x), self.frame_length, self.hop_length, self.axis), rtol=rtol.get(str(self.x.dtype)), atol=atol.get(str(self.x.dtype)))) @place(DEVICES) @parameterize( (TEST_CASE_NAME, 'x', 'frame_length', 'hop_length', 'axis'), [ ('test_1d_input1', rand_x(1, np.float64, shape=[150]), 50, 15, 0), ('test_1d_input2', rand_x(1, np.float64, shape=[150]), 50, 15, -1), ('test_2d_input1', rand_x(2, np.float64, shape=[150, 8]), 50, 15, 0), ('test_2d_input2', rand_x(2, np.float64, shape=[8, 150]), 50, 15, -1), ('test_3d_input1', rand_x(3, np.float64, shape=[150, 4, 2]), 50, 15, 0), ('test_3d_input2', rand_x(3, np.float64, shape=[4, 2, 150]), 50, 15, -1), ]) class TestFrameStatic(unittest.TestCase): def test_frame_static(self): paddle.enable_static() mp, sp = paddle.static.Program(), paddle.static.Program() with paddle.static.program_guard(mp, sp): input = paddle.static.data('input', self.x.shape, dtype=self.x.dtype) output = paddle.signal.frame( input, self.frame_length, self.hop_length, self.axis), exe = paddle.static.Executor(self.place) exe.run(sp) [output] = exe.run(mp, feed={'input': self.x}, fetch_list=[output]) paddle.disable_static() self.assertTrue( np.allclose( frame_for_api_test(self.x, self.frame_length, self.hop_length, self.axis), output, rtol=rtol.get(str(self.x.dtype)), atol=atol.get(str(self.x.dtype)))) @place(DEVICES) @parameterize( (TEST_CASE_NAME, 'x', 'frame_length', 'hop_length', 'axis', 'expect_exception'), [ ('test_axis', rand_x(1, np.float64, shape=[150]), 50, 15, 2, ValueError), ('test_hop_length', rand_x(1, np.float64, shape=[150]), 50, 0, -1, ValueError), ('test_frame_length1', rand_x(2, np.float64, shape=[150, 8]), 0, 15, 0, ValueError), ('test_frame_length2', rand_x(2, np.float64, shape=[150, 8]), 151, 15, 0, ValueError), ]) class TestFrameException(unittest.TestCase): def test_frame(self): with self.assertRaises(self.expect_exception): paddle.signal.frame( paddle.to_tensor(self.x), self.frame_length, self.hop_length, self.axis) @place(DEVICES) @parameterize( (TEST_CASE_NAME, 'x', 'hop_length', 'axis'), [ ('test_2d_input1', rand_x(2, np.float64, shape=[3, 50]), 4, 0), ('test_2d_input2', rand_x(2, np.float64, shape=[50, 3]), 4, -1), ('test_3d_input1', rand_x(3, np.float64, shape=[5, 40, 2]), 10, 0), ('test_3d_input2', rand_x(3, np.float64, shape=[2, 40, 5]), 10, -1), ('test_4d_input1', rand_x(4, np.float64, shape=[8, 12, 5, 3]), 5, 0), ('test_4d_input2', rand_x(4, np.float64, shape=[3, 5, 12, 8]), 5, -1), ]) class TestOverlapAdd(unittest.TestCase): def test_overlap_add(self): self.assertTrue( np.allclose( overlap_add_for_api_test(self.x, self.hop_length, self.axis), paddle.signal.overlap_add( paddle.to_tensor(self.x), self.hop_length, self.axis), rtol=rtol.get(str(self.x.dtype)), atol=atol.get(str(self.x.dtype)))) @place(DEVICES) @parameterize( (TEST_CASE_NAME, 'x', 'hop_length', 'axis'), [ ('test_2d_input1', rand_x(2, np.float64, shape=[3, 50]), 4, 0), ('test_2d_input2', rand_x(2, np.float64, shape=[50, 3]), 4, -1), ('test_3d_input1', rand_x(3, np.float64, shape=[5, 40, 2]), 10, 0), ('test_3d_input2', rand_x(3, np.float64, shape=[2, 40, 5]), 10, -1), ('test_4d_input1', rand_x(4, np.float64, shape=[8, 12, 5, 3]), 5, 0), ('test_4d_input2', rand_x(4, np.float64, shape=[3, 5, 12, 8]), 5, -1), ]) class TestOverlapAddStatic(unittest.TestCase): def test_overlap_add_static(self): paddle.enable_static() mp, sp = paddle.static.Program(), paddle.static.Program() with paddle.static.program_guard(mp, sp): input = paddle.static.data('input', self.x.shape, dtype=self.x.dtype) output = paddle.signal.overlap_add( input, self.hop_length, self.axis), exe = paddle.static.Executor(self.place) exe.run(sp) [output] = exe.run(mp, feed={'input': self.x}, fetch_list=[output]) paddle.disable_static() self.assertTrue( np.allclose( overlap_add_for_api_test(self.x, self.hop_length, self.axis), output, rtol=rtol.get(str(self.x.dtype)), atol=atol.get(str(self.x.dtype)))) @place(DEVICES) @parameterize( (TEST_CASE_NAME, 'x', 'hop_length', 'axis', 'expect_exception'), [ ('test_axis', rand_x(2, np.float64, shape=[3, 50]), 4, 2, ValueError), ('test_hop_length', rand_x(2, np.float64, shape=[50, 3]), -1, -1, ValueError), ]) class TestOverlapAddException(unittest.TestCase): def test_overlap_add(self): with self.assertRaises(self.expect_exception): paddle.signal.overlap_add( paddle.to_tensor(self.x), self.hop_length, self.axis) # ================= STFT # common args # x # n_fft, # hop_length=None, # win_length=None, # window=None, # center=True, # pad_mode='reflect', # paddle only # normalized=False, # onesided=True, # ================= ISTFT # common args # x, # hop_length=None, # win_length=None, # window=None, # center=True, # length=None, # paddle only # n_fft, # normalized=False, # onesided=True, # return_complex=False, @place(DEVICES) @parameterize( (TEST_CASE_NAME, 'x', 'n_fft', 'hop_length', 'win_length', 'window', 'center', 'pad_mode', 'normalized', 'onesided'), [ ('test_1d_input', rand_x(1, np.float64, shape=[160000]), 512, None, None, get_window('hann', 512), True, 'reflect', False, True), ('test_2d_input', rand_x(2, np.float64, shape=[1, 160000]), 512, None, None, get_window('hann', 512), True, 'reflect', False, True), ('test_hop_length', rand_x(2, np.float64, shape=[1, 160000]), 512, 255, None, get_window('hann', 512), True, 'reflect', False, True), ('test_win_length', rand_x(2, np.float64, shape=[1, 160000]), 512, 255, 499, get_window('hann', 499), True, 'reflect', False, True), ('test_window', rand_x(2, np.float64, shape=[1, 160000]), 512, None, None, None, True, 'reflect', False, True), ('test_center', rand_x(2, np.float64, shape=[1, 160000]), 512, None, None, None, False, 'reflect', False, True), ]) class TestStft(unittest.TestCase): def test_stft(self): if self.window is None: win_p = None win_l = 'boxcar' # rectangular window else: win_p = paddle.to_tensor(self.window) win_l = self.window self.assertTrue( np.allclose( stft(self.x, self.n_fft, self.hop_length, self.win_length, win_l, self.center, self.pad_mode), paddle.signal.stft( paddle.to_tensor(self.x), self.n_fft, self.hop_length, self.win_length, win_p, self.center, self.pad_mode, self.normalized, self.onesided), rtol=rtol.get(str(self.x.dtype)), atol=atol.get(str(self.x.dtype)))) @place(DEVICES) @parameterize( (TEST_CASE_NAME, 'x', 'n_fft', 'hop_length', 'win_length', 'window', 'center', 'pad_mode', 'normalized', 'onesided', 'expect_exception'), [ ('test_dims', rand_x(1, np.float64, shape=[1, 2, 3]), 512, None, None, None, True, 'reflect', False, True, AssertionError), ('test_hop_length', rand_x(1, np.float64, shape=[16000]), 512, 0, None, None, True, 'reflect', False, True, AssertionError), ('test_nfft1', rand_x(1, np.float64, shape=[16000]), 0, None, None, None, True, 'reflect', False, True, AssertionError), ('test_nfft2', rand_x(1, np.float64, shape=[16000]), 16001, None, None, None, True, 'reflect', False, True, AssertionError), ('test_win_length', rand_x(1, np.float64, shape=[16000]), 512, None, 0, None, True, 'reflect', False, True, AssertionError), ('test_win_length', rand_x(1, np.float64, shape=[16000]), 512, None, 513, None, True, 'reflect', False, True, AssertionError), ('test_pad_mode', rand_x(1, np.float64, shape=[16000]), 512, None, None, None, True, 'nonsense', False, True, AssertionError), ('test_complex_onesided', rand_x(1, np.float64, shape=[16000], complex=True), 512, None, None, None, False, 'reflect', False, True, AssertionError), ]) class TestStftException(unittest.TestCase): def test_stft(self): if self.window is None: win_p = None else: win_p = paddle.to_tensor(self.window) with self.assertRaises(self.expect_exception): paddle.signal.stft( paddle.to_tensor(self.x), self.n_fft, self.hop_length, self.win_length, win_p, self.center, self.pad_mode, self.normalized, self.onesided), @place(DEVICES) @parameterize( (TEST_CASE_NAME, 'x', 'n_fft', 'hop_length', 'win_length', 'window', 'center', 'normalized', 'onesided', 'length', 'return_complex'), [ ('test_2d_input', rand_x(2, np.float64, shape=[257, 471], complex=True), 512, None, None, get_window('hann', 512), True, False, True, None, False), ('test_3d_input', rand_x(3, np.float64, shape=[1, 257, 471], complex=True), 512, None, None, get_window('hann', 512), True, False, True, None, False), ('test_hop_length', rand_x(3, np.float64, shape=[1, 257, 471], complex=True), 512, 99, None, get_window('hann', 512), True, False, True, None, False), ('test_win_length', rand_x(3, np.float64, shape=[1, 257, 471], complex=True), 512, 99, 299, get_window('hann', 299), True, False, True, None, False), ('test_window', rand_x(3, np.float64, shape=[1, 257, 471], complex=True), 512, None, None, None, True, False, True, None, False), ('test_center', rand_x(3, np.float64, shape=[1, 257, 471], complex=True), 512, None, None, None, False, False, True, None, False), ('test_length', rand_x(3, np.float64, shape=[1, 257, 471], complex=True), 512, None, None, None, False, False, True, 1888, False), ]) class TestIstft(unittest.TestCase): def test_istft(self): if self.window is None: win_p = None win_l = 'boxcar' # rectangular window else: win_p = paddle.to_tensor(self.window) win_l = self.window self.assertTrue( np.allclose( istft(self.x, self.hop_length, self.win_length, win_l, self.center, self.length), paddle.signal.istft( paddle.to_tensor(self.x), self.n_fft, self.hop_length, self.win_length, win_p, self.center, self.normalized, self.onesided, self.length, self.return_complex), rtol=rtol.get(str(self.x.dtype)), atol=atol.get(str(self.x.dtype)))) @place(DEVICES) @parameterize( (TEST_CASE_NAME, 'x', 'n_fft', 'hop_length', 'win_length', 'window', 'center', 'normalized', 'onesided', 'length', 'return_complex', 'expect_exception'), [ ('test_dims', rand_x(4, np.float64, shape=[1, 2, 3, 4], complex=True), 512, None, None, get_window('hann', 512), True, False, True, None, False, AssertionError), ('test_n_fft', rand_x(3, np.float64, shape=[1, 257, 471], complex=True), 257, None, None, get_window('hann', 512), True, False, True, None, False, AssertionError), ('test_hop_length1', rand_x(3, np.float64, shape=[1, 257, 471], complex=True), 512, 0, None, get_window('hann', 512), True, False, True, None, False, AssertionError), ('test_hop_length2', rand_x(3, np.float64, shape=[1, 257, 471], complex=True), 512, 513, None, get_window('hann', 512), True, False, True, None, False, AssertionError), ('test_win_length1', rand_x(3, np.float64, shape=[1, 257, 471], complex=True), 512, None, 0, get_window('hann', 512), True, False, True, None, False, AssertionError), ('test_win_length2', rand_x(3, np.float64, shape=[1, 257, 471], complex=True), 512, None, 513, get_window('hann', 512), True, False, True, None, False, AssertionError), ('test_onesided1', rand_x(3, np.float64, shape=[1, 257, 471], complex=True), 20, None, None, get_window('hann', 512), True, False, True, None, False, AssertionError), ('test_onesided2', rand_x(3, np.float64, shape=[1, 257, 471], complex=True), 256, None, None, None, True, False, False, None, False, AssertionError), ('test_window', rand_x(3, np.float64, shape=[1, 512, 471], complex=True), 512, None, 511, get_window('hann', 512), True, False, False, None, False, AssertionError), ('test_return_complex1', rand_x(3, np.float64, shape=[1, 257, 471], complex=True), 512, None, None, get_window('hann', 512), True, False, True, None, True, AssertionError), ('test_return_complex2', rand_x(3, np.float64, shape=[1, 257, 471], complex=True), 512, None, None, rand_x(1, np.float64, shape=[512], complex=True), True, False, True, None, False, AssertionError), ('test_NOLA', rand_x(3, np.float64, shape=[1, 257, 471], complex=True), 512, 512, None, get_window('hann', 512), True, False, True, None, False, ValueError), ]) class TestIstftException(unittest.TestCase): def test_istft(self): if self.window is None: win_p = None else: win_p = paddle.to_tensor(self.window) with self.assertRaises(self.expect_exception): paddle.signal.istft( paddle.to_tensor(self.x), self.n_fft, self.hop_length, self.win_length, win_p, self.center, self.normalized, self.onesided, self.length, self.return_complex), # yapf: enable if __name__ == '__main__': unittest.main()