cxx-api.cc
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// sherpa-onnx/c-api/cxx-api.cc
//
// Copyright (c) 2024 Xiaomi Corporation
#include "sherpa-onnx/c-api/cxx-api.h"
#include <algorithm>
#include <cstring>
namespace sherpa_onnx::cxx {
Wave ReadWave(const std::string &filename) {
auto p = SherpaOnnxReadWave(filename.c_str());
Wave ans;
if (p) {
ans.samples.resize(p->num_samples);
std::copy(p->samples, p->samples + p->num_samples, ans.samples.data());
ans.sample_rate = p->sample_rate;
SherpaOnnxFreeWave(p);
}
return ans;
}
OnlineStream::OnlineStream(const SherpaOnnxOnlineStream *p)
: MoveOnly<OnlineStream, SherpaOnnxOnlineStream>(p) {}
void OnlineStream::Destroy(const SherpaOnnxOnlineStream *p) const {
SherpaOnnxDestroyOnlineStream(p);
}
void OnlineStream::AcceptWaveform(int32_t sample_rate, const float *samples,
int32_t n) const {
SherpaOnnxOnlineStreamAcceptWaveform(p_, sample_rate, samples, n);
}
OnlineRecognizer OnlineRecognizer::Create(
const OnlineRecognizerConfig &config) {
struct SherpaOnnxOnlineRecognizerConfig c;
memset(&c, 0, sizeof(c));
c.feat_config.sample_rate = config.feat_config.sample_rate;
c.feat_config.feature_dim = config.feat_config.feature_dim;
c.model_config.transducer.encoder =
config.model_config.transducer.encoder.c_str();
c.model_config.transducer.decoder =
config.model_config.transducer.decoder.c_str();
c.model_config.transducer.joiner =
config.model_config.transducer.joiner.c_str();
c.model_config.paraformer.encoder =
config.model_config.paraformer.encoder.c_str();
c.model_config.paraformer.decoder =
config.model_config.paraformer.decoder.c_str();
c.model_config.zipformer2_ctc.model =
config.model_config.zipformer2_ctc.model.c_str();
c.model_config.tokens = config.model_config.tokens.c_str();
c.model_config.num_threads = config.model_config.num_threads;
c.model_config.provider = config.model_config.provider.c_str();
c.model_config.debug = config.model_config.debug;
c.model_config.model_type = config.model_config.model_type.c_str();
c.model_config.modeling_unit = config.model_config.modeling_unit.c_str();
c.model_config.bpe_vocab = config.model_config.bpe_vocab.c_str();
c.model_config.tokens_buf = config.model_config.tokens_buf.c_str();
c.model_config.tokens_buf_size = config.model_config.tokens_buf.size();
c.decoding_method = config.decoding_method.c_str();
c.max_active_paths = config.max_active_paths;
c.enable_endpoint = config.enable_endpoint;
c.rule1_min_trailing_silence = config.rule1_min_trailing_silence;
c.rule2_min_trailing_silence = config.rule2_min_trailing_silence;
c.rule3_min_utterance_length = config.rule3_min_utterance_length;
c.hotwords_file = config.hotwords_file.c_str();
c.hotwords_score = config.hotwords_score;
c.ctc_fst_decoder_config.graph = config.ctc_fst_decoder_config.graph.c_str();
c.ctc_fst_decoder_config.max_active =
config.ctc_fst_decoder_config.max_active;
c.rule_fsts = config.rule_fsts.c_str();
c.rule_fars = config.rule_fars.c_str();
c.blank_penalty = config.blank_penalty;
c.hotwords_buf = config.hotwords_buf.c_str();
c.hotwords_buf_size = config.hotwords_buf.size();
auto p = SherpaOnnxCreateOnlineRecognizer(&c);
return OnlineRecognizer(p);
}
OnlineRecognizer::OnlineRecognizer(const SherpaOnnxOnlineRecognizer *p)
: MoveOnly<OnlineRecognizer, SherpaOnnxOnlineRecognizer>(p) {}
void OnlineRecognizer::Destroy(const SherpaOnnxOnlineRecognizer *p) const {
SherpaOnnxDestroyOnlineRecognizer(p);
}
OnlineStream OnlineRecognizer::CreateStream() const {
auto s = SherpaOnnxCreateOnlineStream(p_);
return OnlineStream{s};
}
OnlineStream OnlineRecognizer::CreateStream(const std::string &hotwords) const {
auto s = SherpaOnnxCreateOnlineStreamWithHotwords(p_, hotwords.c_str());
return OnlineStream{s};
}
bool OnlineRecognizer::IsReady(const OnlineStream *s) const {
return SherpaOnnxIsOnlineStreamReady(p_, s->Get());
}
void OnlineRecognizer::Decode(const OnlineStream *s) const {
SherpaOnnxDecodeOnlineStream(p_, s->Get());
}
void OnlineRecognizer::Decode(const OnlineStream *ss, int32_t n) const {
if (n <= 0) {
return;
}
std::vector<const SherpaOnnxOnlineStream *> streams(n);
for (int32_t i = 0; i != n; ++n) {
streams[i] = ss[i].Get();
}
SherpaOnnxDecodeMultipleOnlineStreams(p_, streams.data(), n);
}
OnlineRecognizerResult OnlineRecognizer::GetResult(
const OnlineStream *s) const {
auto r = SherpaOnnxGetOnlineStreamResult(p_, s->Get());
OnlineRecognizerResult ans;
ans.text = r->text;
ans.tokens.resize(r->count);
for (int32_t i = 0; i != r->count; ++i) {
ans.tokens[i] = r->tokens_arr[i];
}
if (r->timestamps) {
ans.timestamps.resize(r->count);
std::copy(r->timestamps, r->timestamps + r->count, ans.timestamps.data());
}
ans.json = r->json;
SherpaOnnxDestroyOnlineRecognizerResult(r);
return ans;
}
} // namespace sherpa_onnx::cxx