/**
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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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Vocab* vocab = nullptr;
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//const float scale = 22.6274169979695;
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const float scale = 1.0;
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void LoadOnlineConfigFromYaml(const char* filename);
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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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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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// online
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void InitAsr(const std::string &en_model, const std::string &de_model, const std::string &am_cmvn, const std::string &am_config, int thread_num);
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// 2pass
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void InitAsr(const std::string &am_model, const std::string &en_model, const std::string &de_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 Forward(float* din, int len, bool input_finished=true);
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string GreedySearch( float* in, int n_len, int64_t token_nums);
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string Rescoring();
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knf::FbankOptions fbank_opts_;
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vector<float> means_list_;
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vector<float> vars_list_;
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int lfr_m = PARA_LFR_M;
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int lfr_n = PARA_LFR_N;
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// paraformer-offline
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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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// paraformer-online
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std::shared_ptr<Ort::Session> encoder_session_ = nullptr;
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std::shared_ptr<Ort::Session> decoder_session_ = nullptr;
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vector<string> en_strInputNames, en_strOutputNames;
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vector<const char*> en_szInputNames_;
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vector<const char*> en_szOutputNames_;
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vector<string> de_strInputNames, de_strOutputNames;
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vector<const char*> de_szInputNames_;
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vector<const char*> de_szOutputNames_;
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string window_type = "hamming";
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int frame_length = 25;
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int frame_shift = 10;
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int n_mels = 80;
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int encoder_size = 512;
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int fsmn_layers = 16;
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int fsmn_lorder = 10;
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int fsmn_dims = 512;
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float cif_threshold = 1.0;
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float tail_alphas = 0.45;
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};
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} // namespace funasr
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