Support CED models (#792)

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

@@ -0,0 +1,112 @@
+// sherpa-onnx/csrc/offline-ced-model.cc
+//
+// Copyright (c)  2024  Xiaomi Corporation
+
+#include "sherpa-onnx/csrc/offline-ced-model.h"
+
+#include <string>
+#include <vector>
+
+#include "sherpa-onnx/csrc/onnx-utils.h"
+#include "sherpa-onnx/csrc/session.h"
+#include "sherpa-onnx/csrc/text-utils.h"
+#include "sherpa-onnx/csrc/transpose.h"
+
+namespace sherpa_onnx {
+
+class OfflineCEDModel::Impl {
+ public:
+  explicit Impl(const AudioTaggingModelConfig &config)
+      : config_(config),
+        env_(ORT_LOGGING_LEVEL_ERROR),
+        sess_opts_(GetSessionOptions(config)),
+        allocator_{} {
+    auto buf = ReadFile(config_.ced);
+    Init(buf.data(), buf.size());
+  }
+
+#if __ANDROID_API__ >= 9
+  Impl(AAssetManager *mgr, const AudioTaggingModelConfig &config)
+      : config_(config),
+        env_(ORT_LOGGING_LEVEL_ERROR),
+        sess_opts_(GetSessionOptions(config)),
+        allocator_{} {
+    auto buf = ReadFile(mgr, config_.ced);
+    Init(buf.data(), buf.size());
+  }
+#endif
+
+  Ort::Value Forward(Ort::Value features) {
+    features = Transpose12(allocator_, &features);
+
+    auto ans = sess_->Run({}, input_names_ptr_.data(), &features, 1,
+                          output_names_ptr_.data(), output_names_ptr_.size());
+    return std::move(ans[0]);
+  }
+
+  int32_t NumEventClasses() const { return num_event_classes_; }
+
+  OrtAllocator *Allocator() const { return allocator_; }
+
+ private:
+  void Init(void *model_data, size_t model_data_length) {
+    sess_ = std::make_unique<Ort::Session>(env_, model_data, model_data_length,
+                                           sess_opts_);
+
+    GetInputNames(sess_.get(), &input_names_, &input_names_ptr_);
+
+    GetOutputNames(sess_.get(), &output_names_, &output_names_ptr_);
+
+    // get meta data
+    Ort::ModelMetadata meta_data = sess_->GetModelMetadata();
+    if (config_.debug) {
+      std::ostringstream os;
+      PrintModelMetadata(os, meta_data);
+      SHERPA_ONNX_LOGE("%s\n", os.str().c_str());
+    }
+
+    // get num_event_classes from the output[0].shape,
+    // which is (N, num_event_classes)
+    num_event_classes_ =
+        sess_->GetOutputTypeInfo(0).GetTensorTypeAndShapeInfo().GetShape()[1];
+  }
+
+ private:
+  AudioTaggingModelConfig config_;
+  Ort::Env env_;
+  Ort::SessionOptions sess_opts_;
+  Ort::AllocatorWithDefaultOptions allocator_;
+
+  std::unique_ptr<Ort::Session> sess_;
+
+  std::vector<std::string> input_names_;
+  std::vector<const char *> input_names_ptr_;
+
+  std::vector<std::string> output_names_;
+  std::vector<const char *> output_names_ptr_;
+
+  int32_t num_event_classes_ = 0;
+};
+
+OfflineCEDModel::OfflineCEDModel(const AudioTaggingModelConfig &config)
+    : impl_(std::make_unique<Impl>(config)) {}
+
+#if __ANDROID_API__ >= 9
+OfflineCEDModel::OfflineCEDModel(AAssetManager *mgr,
+                                 const AudioTaggingModelConfig &config)
+    : impl_(std::make_unique<Impl>(mgr, config)) {}
+#endif
+
+OfflineCEDModel::~OfflineCEDModel() = default;
+
+Ort::Value OfflineCEDModel::Forward(Ort::Value features) const {
+  return impl_->Forward(std::move(features));
+}
+
+int32_t OfflineCEDModel::NumEventClasses() const {
+  return impl_->NumEventClasses();
+}
+
+OrtAllocator *OfflineCEDModel::Allocator() const { return impl_->Allocator(); }
+
+}  // namespace sherpa_onnx