Support CED models (#792)

sherpa-onnx/csrc/offline-ced-model.h

@@ -0,0 +1,56 @@
+// sherpa-onnx/csrc/offline-ced-model.h
+//
+// Copyright (c)  2024  Xiaomi Corporation
+#ifndef SHERPA_ONNX_CSRC_OFFLINE_CED_MODEL_H_
+#define SHERPA_ONNX_CSRC_OFFLINE_CED_MODEL_H_
+#include <memory>
+#include <utility>
+
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
+#include "onnxruntime_cxx_api.h"  // NOLINT
+#include "sherpa-onnx/csrc/audio-tagging-model-config.h"
+
+namespace sherpa_onnx {
+
+/** This class implements the CED model from
+ * https://github.com/RicherMans/CED/blob/main/export_onnx.py
+ */
+class OfflineCEDModel {
+ public:
+  explicit OfflineCEDModel(const AudioTaggingModelConfig &config);
+
+#if __ANDROID_API__ >= 9
+  OfflineCEDModel(AAssetManager *mgr, const AudioTaggingModelConfig &config);
+#endif
+
+  ~OfflineCEDModel();
+
+  /** Run the forward method of the model.
+   *
+   * @param features  A tensor of shape (N, T, C).
+   *
+   * @return Return a tensor
+   *  - probs: A 2-D tensor of shape (N, num_event_classes).
+   */
+  Ort::Value Forward(Ort::Value features) const;
+
+  /** Return the number of event classes of the model
+   */
+  int32_t NumEventClasses() const;
+
+  /** Return an allocator for allocating memory
+   */
+  OrtAllocator *Allocator() const;
+
+ private:
+  class Impl;
+  std::unique_ptr<Impl> impl_;
+};
+
+}  // namespace sherpa_onnx
+
+#endif  // SHERPA_ONNX_CSRC_OFFLINE_CED_MODEL_H_