keyword-spotter.cc
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// sherpa-onnx/csrc/keyword-spotter.cc
//
// Copyright (c) 2023-2024 Xiaomi Corporation
#include "sherpa-onnx/csrc/keyword-spotter.h"
#include <assert.h>
#include <algorithm>
#include <fstream>
#include <iomanip>
#include <memory>
#include <sstream>
#include <utility>
#include <vector>
#include "sherpa-onnx/csrc/keyword-spotter-impl.h"
namespace sherpa_onnx {
std::string KeywordResult::AsJsonString() const {
std::ostringstream os;
os << "{";
os << "\"start_time\":" << std::fixed << std::setprecision(2) << start_time
<< ", ";
os << "\"keyword\""
<< ": ";
os << "\"" << keyword << "\""
<< ", ";
os << "\""
<< "timestamps"
<< "\""
<< ": ";
os << "[";
std::string sep = "";
for (auto t : timestamps) {
os << sep << std::fixed << std::setprecision(2) << t;
sep = ", ";
}
os << "], ";
os << "\""
<< "tokens"
<< "\""
<< ":";
os << "[";
sep = "";
auto oldFlags = os.flags();
for (const auto &t : tokens) {
if (t.size() == 1 && static_cast<uint8_t>(t[0]) > 0x7f) {
const uint8_t *p = reinterpret_cast<const uint8_t *>(t.c_str());
os << sep << "\""
<< "<0x" << std::hex << std::uppercase << static_cast<uint32_t>(p[0])
<< ">"
<< "\"";
os.flags(oldFlags);
} else {
os << sep << "\"" << t << "\"";
}
sep = ", ";
}
os << "]";
os << "}";
return os.str();
}
void KeywordSpotterConfig::Register(ParseOptions *po) {
feat_config.Register(po);
model_config.Register(po);
po->Register("max-active-paths", &max_active_paths,
"beam size used in modified beam search.");
po->Register("num-trailing-blanks", &num_trailing_blanks,
"The number of trailing blanks should have after the keyword.");
po->Register("keywords-score", &keywords_score,
"The bonus score for each token in context word/phrase.");
po->Register("keywords-threshold", &keywords_threshold,
"The acoustic threshold (probability) to trigger the keywords.");
po->Register(
"keywords-file", &keywords_file,
"The file containing keywords, one word/phrase per line, and for each"
"phrase the bpe/cjkchar are separated by a space. For example: "
"▁HE LL O ▁WORLD"
"你 好 世 界");
}
bool KeywordSpotterConfig::Validate() const {
if (keywords_file.empty()) {
SHERPA_ONNX_LOGE("Please provide --keywords-file.");
return false;
}
if (!std::ifstream(keywords_file.c_str()).good()) {
SHERPA_ONNX_LOGE("Keywords file %s does not exist.", keywords_file.c_str());
return false;
}
return model_config.Validate();
}
std::string KeywordSpotterConfig::ToString() const {
std::ostringstream os;
os << "KeywordSpotterConfig(";
os << "feat_config=" << feat_config.ToString() << ", ";
os << "model_config=" << model_config.ToString() << ", ";
os << "max_active_paths=" << max_active_paths << ", ";
os << "num_trailing_blanks=" << num_trailing_blanks << ", ";
os << "keywords_score=" << keywords_score << ", ";
os << "keywords_threshold=" << keywords_threshold << ", ";
os << "keywords_file=\"" << keywords_file << "\")";
return os.str();
}
KeywordSpotter::KeywordSpotter(const KeywordSpotterConfig &config)
: impl_(KeywordSpotterImpl::Create(config)) {}
#if __ANDROID_API__ >= 9
KeywordSpotter::KeywordSpotter(AAssetManager *mgr,
const KeywordSpotterConfig &config)
: impl_(KeywordSpotterImpl::Create(mgr, config)) {}
#endif
KeywordSpotter::~KeywordSpotter() = default;
std::unique_ptr<OnlineStream> KeywordSpotter::CreateStream() const {
return impl_->CreateStream();
}
std::unique_ptr<OnlineStream> KeywordSpotter::CreateStream(
const std::string &keywords) const {
return impl_->CreateStream(keywords);
}
bool KeywordSpotter::IsReady(OnlineStream *s) const {
return impl_->IsReady(s);
}
void KeywordSpotter::DecodeStreams(OnlineStream **ss, int32_t n) const {
impl_->DecodeStreams(ss, n);
}
KeywordResult KeywordSpotter::GetResult(OnlineStream *s) const {
return impl_->GetResult(s);
}
} // namespace sherpa_onnx