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Recognition.cpp
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Recognition.cpp
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//
// Created by prostoichelovek on 01.05.19.
//
#include <iostream>
#include "Recognition.h"
namespace SpeechRecognition {
Recognition::Recognition(std::string langModel, std::string dict, std::string jsgf,
std::string kws, bool hideLog) {
cmd_ln_t *config;
config = cmd_ln_init(nullptr, ps_args(), TRUE,
"-hmm", langModel.c_str(), "-dict", dict.c_str(),
"-logfn", hideLog ? "/dev/null" : "/dev/stdout", NULL);
deocder = ps_init(config);
if (!jsgf.empty()) {
ps_set_jsgf_file(deocder, searchTypeStr(JSGF).c_str(), jsgf.c_str());
switchMode(JSGF);
}
if (!kws.empty()) {
ps_set_kws(deocder, searchTypeStr(KWS).c_str(), kws.c_str());
switchMode(KWS);
}
audioDev = ad_open_sps((int) cmd_ln_float32_r(config, "-samprate"));
}
Recognition::~Recognition() {
ad_close(audioDev);
runLoop = false;
}
std::string Recognition::recognize_from_microphone() {
ad_start_rec(audioDev); // start recording
ps_start_utt(deocder); // mark the start of the utterance
speech_started = FALSE; // clear the speech_started flag
while (pause) {
int16 buf[128];
ad_read(audioDev, buf, 128);
}
while (!pause) {
// capture the number of frames in the audio buffer
framesInBuf = ad_read(audioDev, audioBuf, 4096);
if (framesInBuf == -1)
break;
ps_process_raw(deocder, audioBuf, framesInBuf, FALSE, FALSE);
in_speech = ps_get_in_speech(deocder);
if (in_speech && !speech_started) {
speech_started = TRUE;
}
if (!in_speech && speech_started) {
ps_end_utt(deocder);
ad_stop_rec(audioDev);
char const *hyp = ps_get_hyp(deocder, nullptr);
if (hyp == nullptr)
return "";
if (current_search_type == JSGF)
std::cout << "JSGF" << std::endl;
if (current_search_type == KWS)
std::cout << "KWS" << std::endl;
return hyp;
}
}
ps_end_utt(deocder);
ad_stop_rec(audioDev);
return "";
}
void Recognition::switchMode(const SearchType &st) {
ps_set_search(deocder, searchTypeStr(st).c_str());
current_search_type = st;
}
void Recognition::loop() {
while (runLoop) {
std::string decoded_speech = recognize_from_microphone();
if (decoded_speech.empty()) continue;
if (maxNoizeOccurs != -1) {
if (countOccurs(decoded_speech, "<s>") > maxNoizeOccurs) continue;
}
if (ps_get_search(deocder) == searchTypeStr(KWS)) {
switchMode(JSGF);
if (onKw)
onKw(decoded_speech);
std::thread([&]() {
while (true) {
std::this_thread::sleep_for(std::chrono::milliseconds(int(kwTimeout * 1000)));
if (in_speech)
continue;
current_search_type = KWS;
break;
}
}).detach();
continue;
}
switchMode(current_search_type);
if (onRecognize) {
if (ps_get_search(deocder) == searchTypeStr(JSGF)) {
onRecognize(decoded_speech);
}
}
if (ps_get_search(deocder) == searchTypeStr(JSGF))
switchMode(KWS);
}
}
void Recognition::start() {
runLoop = true;
loopTh = std::thread(&Recognition::loop, this);
}
void Recognition::wait() {
if (runLoop && loopTh.joinable())
loopTh.join();
}
}