// sherpa-onnx/csrc/offline-transducer-modified-beam-search-decoder.h
//
// Copyright (c) 2023 Xiaomi Corporation
#ifndef SHERPA_ONNX_CSRC_OFFLINE_TRANSDUCER_MODIFIED_BEAM_SEARCH_DECODER_H_
#define SHERPA_ONNX_CSRC_OFFLINE_TRANSDUCER_MODIFIED_BEAM_SEARCH_DECODER_H_
#include <vector>
#include "sherpa-onnx/csrc/offline-lm.h"
#include "sherpa-onnx/csrc/offline-transducer-decoder.h"
#include "sherpa-onnx/csrc/offline-transducer-model.h"
namespace sherpa_onnx {
class OfflineTransducerModifiedBeamSearchDecoder
: public OfflineTransducerDecoder {
public:
OfflineTransducerModifiedBeamSearchDecoder(OfflineTransducerModel *model,
OfflineLM *lm,
int32_t max_active_paths,
float lm_scale)
: model_(model),
lm_(lm),
max_active_paths_(max_active_paths),
lm_scale_(lm_scale) {}
std::vector<OfflineTransducerDecoderResult> Decode(
Ort::Value encoder_out, Ort::Value encoder_out_length,
OfflineStream **ss = nullptr, int32_t n = 0) override;
private:
OfflineTransducerModel *model_; // Not owned
OfflineLM *lm_; // Not owned; may be nullptr
int32_t max_active_paths_;
float lm_scale_; // used only when lm_ is not nullptr
};
} // namespace sherpa_onnx
#endif // SHERPA_ONNX_CSRC_OFFLINE_TRANSDUCER_MODIFIED_BEAM_SEARCH_DECODER_H_
