45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
// sherpa-onnx/csrc/offline-whisper-decoder.h
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//
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// Copyright (c) 2023 Xiaomi Corporation
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#ifndef SHERPA_ONNX_CSRC_OFFLINE_WHISPER_DECODER_H_
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#define SHERPA_ONNX_CSRC_OFFLINE_WHISPER_DECODER_H_
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#include <string>
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#include <vector>
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#include "onnxruntime_cxx_api.h" // NOLINT
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#include "sherpa-onnx/csrc/offline-whisper-model-config.h"
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namespace sherpa_onnx {
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struct OfflineWhisperDecoderResult {
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/// The decoded token IDs
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std::vector<int32_t> tokens;
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std::string lang;
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};
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class OfflineWhisperDecoder {
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public:
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virtual ~OfflineWhisperDecoder() = default;
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/** Run beam search given the output from the whisper encoder model.
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*
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* @param n_layer_cross_k A 4-D tensor of shape
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* (n_text_layer, N, n_audio_ctx, n_text_state).
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* @param n_layer_cross_v A 4-D tensor of shape
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* (n_text_layer, N, n_audio_ctx, n_text_state).
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*
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* @return Return a vector of size `N` containing the decoded results.
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*/
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virtual std::vector<OfflineWhisperDecoderResult> Decode(
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Ort::Value n_layer_cross_k, Ort::Value n_layer_cross_v,
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int32_t num_feature_frames) = 0;
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virtual void SetConfig(const OfflineWhisperModelConfig &config) = 0;
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};
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} // namespace sherpa_onnx
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#endif // SHERPA_ONNX_CSRC_OFFLINE_WHISPER_DECODER_H_
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