offline-ced-model.cc
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// 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/file-utils.h"
#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() { 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