File size: 1,940 Bytes
d596074 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 | #!/usr/bin/env python3
# Copyright 2022 Xiaomi Corp. (authors: Fangjun Kuang)
#
# See ../LICENSE for clarification regarding multiple authors
#
# 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 graphviz
from icefall import is_module_available
if not is_module_available("kaldifst"):
raise ValueError("Please 'pip install kaldifst' first.")
import kaldifst
from icefall import NgramLm, NgramLmStateCost
def generate_fst(filename: str):
s = """
3 5 1 1 3.00464
3 0 3 0 5.75646
0 1 1 1 12.0533
0 2 2 2 7.95954
0 9.97787
1 4 2 2 3.35436
1 0 3 0 7.59853
2 0 3 0
4 2 3 0 7.43735
4 0.551239
5 4 2 2 0.804938
5 1 3 0 9.67086
"""
fst = kaldifst.compile(s=s, acceptor=False)
fst.write(filename)
fst_dot = kaldifst.draw(fst, acceptor=False, portrait=True)
source = graphviz.Source(fst_dot)
source.render(outfile=f"{filename}.svg")
def main():
filename = "test.fst"
generate_fst(filename)
ngram_lm = NgramLm(filename, backoff_id=3, is_binary=True)
for label in [1, 2, 3, 4, 5]:
print("---label---", label)
p = ngram_lm.get_next_state_and_cost(state=5, label=label)
print(p)
print("---")
state_cost = NgramLmStateCost(ngram_lm)
s0 = state_cost.forward_one_step(1)
print(s0.state_cost)
s1 = s0.forward_one_step(2)
print(s1.state_cost)
s2 = s1.forward_one_step(2)
print(s2.state_cost)
if __name__ == "__main__":
main()
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