offline-recognizer.cc
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// sherpa-onnx/csrc/offline-recognizer.cc
//
// Copyright (c) 2023 Xiaomi Corporation
#include "sherpa-onnx/csrc/offline-recognizer.h"
#include <memory>
#include "sherpa-onnx/csrc/file-utils.h"
#include "sherpa-onnx/csrc/macros.h"
#include "sherpa-onnx/csrc/offline-lm-config.h"
#include "sherpa-onnx/csrc/offline-recognizer-impl.h"
namespace sherpa_onnx {
void OfflineRecognizerConfig::Register(ParseOptions *po) {
feat_config.Register(po);
model_config.Register(po);
lm_config.Register(po);
po->Register(
"decoding-method", &decoding_method,
"decoding method,"
"Valid values: greedy_search, modified_beam_search. "
"modified_beam_search is applicable only for transducer models.");
po->Register("max-active-paths", &max_active_paths,
"Used only when decoding_method is modified_beam_search");
po->Register("context-score", &context_score,
"The bonus score for each token in context word/phrase. "
"Used only when decoding_method is modified_beam_search");
}
bool OfflineRecognizerConfig::Validate() const {
if (decoding_method == "modified_beam_search" && !lm_config.model.empty()) {
if (max_active_paths <= 0) {
SHERPA_ONNX_LOGE("max_active_paths is less than 0! Given: %d",
max_active_paths);
return false;
}
if (!lm_config.Validate()) return false;
}
return model_config.Validate();
}
std::string OfflineRecognizerConfig::ToString() const {
std::ostringstream os;
os << "OfflineRecognizerConfig(";
os << "feat_config=" << feat_config.ToString() << ", ";
os << "model_config=" << model_config.ToString() << ", ";
os << "lm_config=" << lm_config.ToString() << ", ";
os << "decoding_method=\"" << decoding_method << "\", ";
os << "max_active_paths=" << max_active_paths << ", ";
os << "context_score=" << context_score << ")";
return os.str();
}
#if __ANDROID_API__ >= 9
OfflineRecognizer::OfflineRecognizer(AAssetManager *mgr,
const OfflineRecognizerConfig &config)
: impl_(OfflineRecognizerImpl::Create(mgr, config)) {}
#endif
OfflineRecognizer::OfflineRecognizer(const OfflineRecognizerConfig &config)
: impl_(OfflineRecognizerImpl::Create(config)) {}
OfflineRecognizer::~OfflineRecognizer() = default;
std::unique_ptr<OfflineStream> OfflineRecognizer::CreateStream(
const std::vector<std::vector<int32_t>> &context_list) const {
return impl_->CreateStream(context_list);
}
std::unique_ptr<OfflineStream> OfflineRecognizer::CreateStream() const {
return impl_->CreateStream();
}
void OfflineRecognizer::DecodeStreams(OfflineStream **ss, int32_t n) const {
impl_->DecodeStreams(ss, n);
}
} // namespace sherpa_onnx