From 030043f768fa82c73e5decdf95f1016bf49b962a Mon Sep 17 00:00:00 2001
From: zhifu gao <zhifu.gzf@alibaba-inc.com>
Date: 星期四, 13 四月 2023 10:05:16 +0800
Subject: [PATCH] Merge pull request #341 from alibaba-damo-academy/dev_zly2
---
funasr/runtime/python/onnxruntime/funasr_onnx/utils/frontend.py | 184 +++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 183 insertions(+), 1 deletions(-)
diff --git a/funasr/runtime/python/onnxruntime/funasr_onnx/utils/frontend.py b/funasr/runtime/python/onnxruntime/funasr_onnx/utils/frontend.py
index 11a8644..c92db4e 100644
--- a/funasr/runtime/python/onnxruntime/funasr_onnx/utils/frontend.py
+++ b/funasr/runtime/python/onnxruntime/funasr_onnx/utils/frontend.py
@@ -1,6 +1,7 @@
# -*- encoding: utf-8 -*-
from pathlib import Path
from typing import Any, Dict, Iterable, List, NamedTuple, Set, Tuple, Union
+import copy
import numpy as np
from typeguard import check_argument_types
@@ -153,6 +154,187 @@
cmvn = np.array([means, vars])
return cmvn
+
+class WavFrontendOnline(WavFrontend):
+ def __init__(self, **kwargs):
+ super().__init__(**kwargs)
+ # self.fbank_fn = knf.OnlineFbank(self.opts)
+ # add variables
+ self.frame_sample_length = int(self.opts.frame_opts.frame_length_ms * self.opts.frame_opts.samp_freq / 1000)
+ self.frame_shift_sample_length = int(self.opts.frame_opts.frame_shift_ms * self.opts.frame_opts.samp_freq / 1000)
+ self.waveform = None
+ self.reserve_waveforms = None
+ self.input_cache = None
+ self.lfr_splice_cache = []
+
+ @staticmethod
+ # inputs has catted the cache
+ def apply_lfr(inputs: np.ndarray, lfr_m: int, lfr_n: int, is_final: bool = False) -> Tuple[
+ np.ndarray, np.ndarray, int]:
+ """
+ Apply lfr with data
+ """
+
+ LFR_inputs = []
+ T = inputs.shape[0] # include the right context
+ T_lfr = int(np.ceil((T - (lfr_m - 1) // 2) / lfr_n)) # minus the right context: (lfr_m - 1) // 2
+ splice_idx = T_lfr
+ for i in range(T_lfr):
+ if lfr_m <= T - i * lfr_n:
+ LFR_inputs.append((inputs[i * lfr_n:i * lfr_n + lfr_m]).reshape(1, -1))
+ else: # process last LFR frame
+ if is_final:
+ num_padding = lfr_m - (T - i * lfr_n)
+ frame = (inputs[i * lfr_n:]).reshape(-1)
+ for _ in range(num_padding):
+ frame = np.hstack((frame, inputs[-1]))
+ LFR_inputs.append(frame)
+ else:
+ # update splice_idx and break the circle
+ splice_idx = i
+ break
+ splice_idx = min(T - 1, splice_idx * lfr_n)
+ lfr_splice_cache = inputs[splice_idx:, :]
+ LFR_outputs = np.vstack(LFR_inputs)
+ return LFR_outputs.astype(np.float32), lfr_splice_cache, splice_idx
+
+ @staticmethod
+ def compute_frame_num(sample_length: int, frame_sample_length: int, frame_shift_sample_length: int) -> int:
+ frame_num = int((sample_length - frame_sample_length) / frame_shift_sample_length + 1)
+ return frame_num if frame_num >= 1 and sample_length >= frame_sample_length else 0
+
+
+ def fbank(
+ self,
+ input: np.ndarray,
+ input_lengths: np.ndarray
+ ) -> Tuple[np.ndarray, np.ndarray, np.ndarray]:
+ self.fbank_fn = knf.OnlineFbank(self.opts)
+ batch_size = input.shape[0]
+ if self.input_cache is None:
+ self.input_cache = np.empty((batch_size, 0), dtype=np.float32)
+ input = np.concatenate((self.input_cache, input), axis=1)
+ frame_num = self.compute_frame_num(input.shape[-1], self.frame_sample_length, self.frame_shift_sample_length)
+ # update self.in_cache
+ self.input_cache = input[:, -(input.shape[-1] - frame_num * self.frame_shift_sample_length):]
+ waveforms = np.empty(0, dtype=np.int16)
+ feats_pad = np.empty(0, dtype=np.float32)
+ feats_lens = np.empty(0, dtype=np.int32)
+ if frame_num:
+ waveforms = []
+ feats = []
+ feats_lens = []
+ for i in range(batch_size):
+ waveform = input[i]
+ waveforms.append(
+ waveform[:((frame_num - 1) * self.frame_shift_sample_length + self.frame_sample_length)])
+ waveform = waveform * (1 << 15)
+
+ self.fbank_fn.accept_waveform(self.opts.frame_opts.samp_freq, waveform.tolist())
+ frames = self.fbank_fn.num_frames_ready
+ mat = np.empty([frames, self.opts.mel_opts.num_bins])
+ for i in range(frames):
+ mat[i, :] = self.fbank_fn.get_frame(i)
+ feat = mat.astype(np.float32)
+ feat_len = np.array(mat.shape[0]).astype(np.int32)
+ feats.append(mat)
+ feats_lens.append(feat_len)
+
+ waveforms = np.stack(waveforms)
+ feats_lens = np.array(feats_lens)
+ feats_pad = np.array(feats)
+ self.fbanks = feats_pad
+ self.fbanks_lens = copy.deepcopy(feats_lens)
+ return waveforms, feats_pad, feats_lens
+
+ def get_fbank(self) -> Tuple[np.ndarray, np.ndarray]:
+ return self.fbanks, self.fbanks_lens
+
+ def lfr_cmvn(
+ self,
+ input: np.ndarray,
+ input_lengths: np.ndarray,
+ is_final: bool = False
+ ) -> Tuple[np.ndarray, np.ndarray, List[int]]:
+ batch_size = input.shape[0]
+ feats = []
+ feats_lens = []
+ lfr_splice_frame_idxs = []
+ for i in range(batch_size):
+ mat = input[i, :input_lengths[i], :]
+ lfr_splice_frame_idx = -1
+ if self.lfr_m != 1 or self.lfr_n != 1:
+ # update self.lfr_splice_cache in self.apply_lfr
+ mat, self.lfr_splice_cache[i], lfr_splice_frame_idx = self.apply_lfr(mat, self.lfr_m, self.lfr_n,
+ is_final)
+ if self.cmvn_file is not None:
+ mat = self.apply_cmvn(mat)
+ feat_length = mat.shape[0]
+ feats.append(mat)
+ feats_lens.append(feat_length)
+ lfr_splice_frame_idxs.append(lfr_splice_frame_idx)
+
+ feats_lens = np.array(feats_lens)
+ feats_pad = np.array(feats)
+ return feats_pad, feats_lens, lfr_splice_frame_idxs
+
+
+ def extract_fbank(
+ self, input: np.ndarray, input_lengths: np.ndarray, is_final: bool = False
+ ) -> Tuple[np.ndarray, np.ndarray]:
+ batch_size = input.shape[0]
+ assert batch_size == 1, 'we support to extract feature online only when the batch size is equal to 1 now'
+ waveforms, feats, feats_lengths = self.fbank(input, input_lengths) # input shape: B T D
+ if feats.shape[0]:
+ self.waveforms = waveforms if self.reserve_waveforms is None else np.concatenate(
+ (self.reserve_waveforms, waveforms), axis=1)
+ if not self.lfr_splice_cache:
+ for i in range(batch_size):
+ self.lfr_splice_cache.append(np.expand_dims(feats[i][0, :], axis=0).repeat((self.lfr_m - 1) // 2, axis=0))
+
+ if feats_lengths[0] + self.lfr_splice_cache[0].shape[0] >= self.lfr_m:
+ lfr_splice_cache_np = np.stack(self.lfr_splice_cache) # B T D
+ feats = np.concatenate((lfr_splice_cache_np, feats), axis=1)
+ feats_lengths += lfr_splice_cache_np[0].shape[0]
+ frame_from_waveforms = int(
+ (self.waveforms.shape[1] - self.frame_sample_length) / self.frame_shift_sample_length + 1)
+ minus_frame = (self.lfr_m - 1) // 2 if self.reserve_waveforms is None else 0
+ feats, feats_lengths, lfr_splice_frame_idxs = self.lfr_cmvn(feats, feats_lengths, is_final)
+ if self.lfr_m == 1:
+ self.reserve_waveforms = None
+ else:
+ reserve_frame_idx = lfr_splice_frame_idxs[0] - minus_frame
+ # print('reserve_frame_idx: ' + str(reserve_frame_idx))
+ # print('frame_frame: ' + str(frame_from_waveforms))
+ self.reserve_waveforms = self.waveforms[:, reserve_frame_idx * self.frame_shift_sample_length:frame_from_waveforms * self.frame_shift_sample_length]
+ sample_length = (frame_from_waveforms - 1) * self.frame_shift_sample_length + self.frame_sample_length
+ self.waveforms = self.waveforms[:, :sample_length]
+ else:
+ # update self.reserve_waveforms and self.lfr_splice_cache
+ self.reserve_waveforms = self.waveforms[:,
+ :-(self.frame_sample_length - self.frame_shift_sample_length)]
+ for i in range(batch_size):
+ self.lfr_splice_cache[i] = np.concatenate((self.lfr_splice_cache[i], feats[i]), axis=0)
+ return np.empty(0, dtype=np.float32), feats_lengths
+ else:
+ if is_final:
+ self.waveforms = waveforms if self.reserve_waveforms is None else self.reserve_waveforms
+ feats = np.stack(self.lfr_splice_cache)
+ feats_lengths = np.zeros(batch_size, dtype=np.int32) + feats.shape[1]
+ feats, feats_lengths, _ = self.lfr_cmvn(feats, feats_lengths, is_final)
+ if is_final:
+ self.cache_reset()
+ return feats, feats_lengths
+
+ def get_waveforms(self):
+ return self.waveforms
+
+ def cache_reset(self):
+ self.fbank_fn = knf.OnlineFbank(self.opts)
+ self.reserve_waveforms = None
+ self.input_cache = None
+ self.lfr_splice_cache = []
+
def load_bytes(input):
middle_data = np.frombuffer(input, dtype=np.int16)
middle_data = np.asarray(middle_data)
@@ -188,4 +370,4 @@
return feat, feat_len
if __name__ == '__main__':
- test()
\ No newline at end of file
+ test()
--
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