55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
// sherpa-onnx/csrc/online-transducer-modified_beam-search-decoder.h
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//
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// Copyright (c) 2023 Pingfeng Luo
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// Copyright (c) 2023 Xiaomi Corporation
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#ifndef SHERPA_ONNX_CSRC_ONLINE_TRANSDUCER_MODIFIED_BEAM_SEARCH_DECODER_H_
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#define SHERPA_ONNX_CSRC_ONLINE_TRANSDUCER_MODIFIED_BEAM_SEARCH_DECODER_H_
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#include <vector>
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#include "sherpa-onnx/csrc/online-lm.h"
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#include "sherpa-onnx/csrc/online-stream.h"
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#include "sherpa-onnx/csrc/online-transducer-decoder.h"
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#include "sherpa-onnx/csrc/online-transducer-model.h"
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namespace sherpa_onnx {
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class OnlineTransducerModifiedBeamSearchDecoder
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: public OnlineTransducerDecoder {
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public:
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OnlineTransducerModifiedBeamSearchDecoder(OnlineTransducerModel *model,
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OnlineLM *lm,
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int32_t max_active_paths,
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float lm_scale, int32_t unk_id)
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: model_(model),
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lm_(lm),
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max_active_paths_(max_active_paths),
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lm_scale_(lm_scale),
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unk_id_(unk_id) {}
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OnlineTransducerDecoderResult GetEmptyResult() const override;
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void StripLeadingBlanks(OnlineTransducerDecoderResult *r) const override;
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void Decode(Ort::Value encoder_out,
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std::vector<OnlineTransducerDecoderResult> *result) override;
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void Decode(Ort::Value encoder_out, OnlineStream **ss,
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std::vector<OnlineTransducerDecoderResult> *result) override;
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void UpdateDecoderOut(OnlineTransducerDecoderResult *result) override;
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private:
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OnlineTransducerModel *model_; // Not owned
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OnlineLM *lm_; // Not owned
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int32_t max_active_paths_;
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float lm_scale_; // used only when lm_ is not nullptr
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int32_t unk_id_;
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};
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} // namespace sherpa_onnx
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#endif // SHERPA_ONNX_CSRC_ONLINE_TRANSDUCER_MODIFIED_BEAM_SEARCH_DECODER_H_
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