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75 lines
2.6 KiB
75 lines
2.6 KiB
// Copyright (c) 2021 Xingchen Song sxc19@mails.tsinghua.edu.cn
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// 2023 Jing Du (thuduj12@163.com)
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License
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#ifndef POST_PROCESSOR_POST_PROCESSOR_H_
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#define POST_PROCESSOR_POST_PROCESSOR_H_
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#include <memory>
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#include <string>
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#include <utility>
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#include "utils/utils.h"
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namespace wenet {
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enum LanguageType {
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// spaces between **mandarin words** should be removed.
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// cases of processing spaces with mandarin-only, english-only
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// and mandarin-english code-switch can be found in post_processor_test.cc
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kMandarinEnglish = 0x00,
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// spaces should be kept for most of the
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// Indo-European languages (i.e., deutsch or english-deutsch code-switch).
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// cases of those languages can be found in post_processor_test.cc
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kIndoEuropean = 0x01
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};
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struct PostProcessOptions {
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// space options
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// The decoded result may contain spaces (' ' or '_'),
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// we will process those spaces according to language_type. More details can
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// be found in
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// https://github.com/wenet-e2e/wenet/issues/583#issuecomment-907994058
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LanguageType language_type = kMandarinEnglish;
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// whether lowercase letters are required
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bool lowercase = true;
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bool itn = false;
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};
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// TODO(xcsong): add punctuation related resource
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// Post Processor
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class PostProcessor {
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public:
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explicit PostProcessor(PostProcessOptions&& opts) : opts_(std::move(opts)) {}
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explicit PostProcessor(const PostProcessOptions& opts) : opts_(opts) {}
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// call other functions to do post processing
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std::string Process(const std::string& str, bool finish);
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// process spaces according to configurations
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std::string ProcessSpace(const std::string& str);
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std::string ProcessSymbols(const std::string& str);
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// TODO(xcsong): add punctuation
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// void Punctuate(const std::string& str);
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void InitITNResource(const std::string& tagger_path,
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const std::string& verbalizer_path);
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private:
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std::shared_ptr<PostProcessor> itn_resource = nullptr;
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const PostProcessOptions opts_;
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public:
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WENET_DISALLOW_COPY_AND_ASSIGN(PostProcessor);
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};
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} // namespace wenet
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#endif // POST_PROCESSOR_POST_PROCESSOR_H_
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