e475e750ac
* Support streaming zipformer CTC * test online zipformer2 CTC * Update doc of sherpa-onnx.cc * Add Python APIs for streaming zipformer2 ctc * Add Python API examples for streaming zipformer2 ctc * Swift API for streaming zipformer2 CTC * NodeJS API for streaming zipformer2 CTC * Kotlin API for streaming zipformer2 CTC * Golang API for streaming zipformer2 CTC * C# API for streaming zipformer2 CTC * Release v1.9.6
46 lines
1.1 KiB
C++
46 lines
1.1 KiB
C++
// sherpa-onnx/csrc/online-ctc-decoder.h
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//
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// Copyright (c) 2023 Xiaomi Corporation
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#ifndef SHERPA_ONNX_CSRC_ONLINE_CTC_DECODER_H_
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#define SHERPA_ONNX_CSRC_ONLINE_CTC_DECODER_H_
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#include <vector>
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#include "onnxruntime_cxx_api.h" // NOLINT
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namespace sherpa_onnx {
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struct OnlineCtcDecoderResult {
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/// Number of frames after subsampling we have decoded so far
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int32_t frame_offset = 0;
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/// The decoded token IDs
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std::vector<int64_t> tokens;
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/// timestamps[i] contains the output frame index where tokens[i] is decoded.
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/// Note: The index is after subsampling
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std::vector<int32_t> timestamps;
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int32_t num_trailing_blanks = 0;
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};
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class OnlineCtcDecoder {
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public:
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virtual ~OnlineCtcDecoder() = default;
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/** Run streaming CTC decoding given the output from the encoder model.
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*
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* @param log_probs A 3-D tensor of shape (N, T, vocab_size) containing
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* lob_probs.
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*
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* @param results Input & Output parameters..
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*/
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virtual void Decode(Ort::Value log_probs,
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std::vector<OnlineCtcDecoderResult> *results) = 0;
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};
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} // namespace sherpa_onnx
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#endif // SHERPA_ONNX_CSRC_ONLINE_CTC_DECODER_H_
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