Support RKNN for Zipformer CTC models. (#1948)

sherpa-onnx/csrc/rknn/online-zipformer-ctc-model-rknn.h

@@ -0,0 +1,46 @@
+// sherpa-onnx/csrc/rknn/online-zipformer-ctc-model-rknn.h
+//
+// Copyright (c)  2025  Xiaomi Corporation
+#ifndef SHERPA_ONNX_CSRC_RKNN_ONLINE_ZIPFORMER_CTC_MODEL_RKNN_H_
+#define SHERPA_ONNX_CSRC_RKNN_ONLINE_ZIPFORMER_CTC_MODEL_RKNN_H_
+
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "rknn_api.h"  // NOLINT
+#include "sherpa-onnx/csrc/online-model-config.h"
+
+namespace sherpa_onnx {
+
+class OnlineZipformerCtcModelRknn {
+ public:
+  ~OnlineZipformerCtcModelRknn();
+
+  explicit OnlineZipformerCtcModelRknn(const OnlineModelConfig &config);
+
+  template <typename Manager>
+  OnlineZipformerCtcModelRknn(Manager *mgr, const OnlineModelConfig &config);
+
+  std::vector<std::vector<uint8_t>> GetInitStates() const;
+
+  std::pair<std::vector<float>, std::vector<std::vector<uint8_t>>> Run(
+      std::vector<float> features,
+      std::vector<std::vector<uint8_t>> states) const;
+
+  int32_t ChunkSize() const;
+
+  int32_t ChunkShift() const;
+
+  int32_t VocabSize() const;
+
+  rknn_tensor_attr GetOutAttr() const;
+
+ private:
+  class Impl;
+  std::unique_ptr<Impl> impl_;
+};
+
+}  // namespace sherpa_onnx
+
+#endif  // SHERPA_ONNX_CSRC_RKNN_ONLINE_ZIPFORMER_CTC_MODEL_RKNN_H_