/**
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* Copyright FunASR (https://github.com/alibaba-damo-academy/FunASR). All Rights Reserved.
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* MIT License (https://opensource.org/licenses/MIT)
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*/
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#pragma once
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#include "precomp.h"
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namespace funasr {
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class Paraformer : public Model {
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/**
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* Author: Speech Lab of DAMO Academy, Alibaba Group
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* Paraformer: Fast and Accurate Parallel Transformer for Non-autoregressive End-to-End Speech Recognition
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* https://arxiv.org/pdf/2206.08317.pdf
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*/
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private:
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//std::unique_ptr<knf::OnlineFbank> fbank_;
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knf::FbankOptions fbank_opts;
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Vocab* vocab = nullptr;
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vector<float> means_list;
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vector<float> vars_list;
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const float scale = 22.6274169979695;
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int32_t lfr_window_size = 7;
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int32_t lfr_window_shift = 6;
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void LoadCmvn(const char *filename);
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vector<float> ApplyLfr(const vector<float> &in);
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void ApplyCmvn(vector<float> *v);
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string GreedySearch( float* in, int n_len, int64_t token_nums);
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std::shared_ptr<Ort::Session> m_session = nullptr;
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Ort::Env env_;
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Ort::SessionOptions session_options;
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vector<string> m_strInputNames, m_strOutputNames;
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vector<const char*> m_szInputNames;
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vector<const char*> m_szOutputNames;
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public:
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Paraformer();
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~Paraformer();
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void InitAsr(const std::string &am_model, const std::string &am_cmvn, const std::string &am_config, int thread_num);
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void Reset();
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vector<float> FbankKaldi(float sample_rate, const float* waves, int len);
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string ForwardChunk(float* din, int len, int flag);
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string Forward(float* din, int len, int flag);
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string Rescoring();
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};
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} // namespace funasr
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