#include <algorithm>
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#include <chrono>
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#include <cmath>
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#include <iostream>
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#include <sstream>
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#include <memory>
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#include <string>
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#include <grpc/grpc.h>
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#include <grpcpp/server.h>
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#include <grpcpp/server_builder.h>
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#include <grpcpp/server_context.h>
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#include <grpcpp/security/server_credentials.h>
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#include "paraformer.grpc.pb.h"
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#include "paraformer_server.h"
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using grpc::Server;
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using grpc::ServerBuilder;
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using grpc::ServerContext;
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using grpc::ServerReader;
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using grpc::ServerReaderWriter;
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using grpc::ServerWriter;
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using grpc::Status;
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using paraformer::Request;
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using paraformer::Response;
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using paraformer::ASR;
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ASRServicer::ASRServicer(const char* model_path, int thread_num) {
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AsrHanlde=RapidAsrInit(model_path, thread_num);
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std::cout << "ASRServicer init" << std::endl;
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init_flag = 0;
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}
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void ASRServicer::clear_states(const std::string& user) {
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clear_buffers(user);
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clear_transcriptions(user);
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}
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void ASRServicer::clear_buffers(const std::string& user) {
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if (client_buffers.count(user)) {
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client_buffers.erase(user);
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}
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}
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void ASRServicer::clear_transcriptions(const std::string& user) {
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if (client_transcription.count(user)) {
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client_transcription.erase(user);
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}
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}
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void ASRServicer::disconnect(const std::string& user) {
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clear_states(user);
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std::cout << "Disconnecting user: " << user << std::endl;
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}
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grpc::Status ASRServicer::Recognize(
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grpc::ServerContext* context,
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grpc::ServerReaderWriter<Response, Request>* stream) {
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Request req;
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while (stream->Read(&req)) {
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if (req.isend()) {
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std::cout << "asr end" << std::endl;
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disconnect(req.user());
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Response res;
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res.set_sentence(
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R"({"success": true, "detail": "asr end"})"
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);
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res.set_user(req.user());
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res.set_action("terminate");
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res.set_language(req.language());
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stream->Write(res);
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} else if (req.speaking()) {
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if (req.audio_data().size() > 0) {
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auto& buf = client_buffers[req.user()];
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buf.insert(buf.end(), req.audio_data().begin(), req.audio_data().end());
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}
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Response res;
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res.set_sentence(
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R"({"success": true, "detail": "speaking"})"
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);
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res.set_user(req.user());
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res.set_action("speaking");
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res.set_language(req.language());
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stream->Write(res);
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} else if (!req.speaking()) {
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if (client_buffers.count(req.user()) == 0) {
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Response res;
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res.set_sentence(
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R"({"success": true, "detail": "waiting_for_voice"})"
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);
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res.set_user(req.user());
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res.set_action("waiting");
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res.set_language(req.language());
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stream->Write(res);
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}else {
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auto begin_time = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count();
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std::string tmp_data = this->client_buffers[req.user()];
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this->clear_states(req.user());
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Response res;
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res.set_sentence(
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R"({"success": true, "detail": "decoding data: " + std::to_string(tmp_data.length()) + " bytes"})"
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);
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int data_len_int = tmp_data.length();
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std::string data_len = std::to_string(data_len_int);
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std::stringstream ss;
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ss << R"({"success": true, "detail": "decoding data: )" << data_len << R"( bytes")" << R"("})";
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std::string result = ss.str();
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res.set_sentence(result);
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res.set_user(req.user());
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res.set_action("decoding");
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res.set_language(req.language());
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stream->Write(res);
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if (tmp_data.length() < 800) { //min input_len for asr model
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auto end_time = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count();
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std::string delay_str = std::to_string(end_time - begin_time);
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std::cout << "user: " << req.user() << " , delay(ms): " << delay_str << ", error: data_is_not_long_enough" << std::endl;
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Response res;
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std::stringstream ss;
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std::string asr_result = "";
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ss << R"({"success": true, "detail": "finish_sentence","server_delay_ms":)" << delay_str << R"(,"text":")" << asr_result << R"("})";
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std::string result = ss.str();
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res.set_sentence(result);
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res.set_user(req.user());
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res.set_action("finish");
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res.set_language(req.language());
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stream->Write(res);
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}
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else {
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RPASR_RESULT Result= RapidAsrRecogPCMBuffer(AsrHanlde, tmp_data.c_str(), data_len_int, RASR_NONE, NULL);
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std::string asr_result = ((RPASR_RECOG_RESULT*)Result)->msg;
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auto end_time = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count();
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std::string delay_str = std::to_string(end_time - begin_time);
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std::cout << "user: " << req.user() << " , delay(ms): " << delay_str << ", text: " << asr_result << std::endl;
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Response res;
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std::stringstream ss;
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ss << R"({"success": true, "detail": "finish_sentence","server_delay_ms":)" << delay_str << R"(,"text":")" << asr_result << R"("})";
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std::string result = ss.str();
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res.set_sentence(result);
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res.set_user(req.user());
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res.set_action("finish");
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res.set_language(req.language());
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stream->Write(res);
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}
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}
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}else {
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Response res;
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res.set_sentence(
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R"({"success": false, "detail": "error, no condition matched! Unknown reason."})"
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);
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res.set_user(req.user());
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res.set_action("terminate");
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res.set_language(req.language());
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stream->Write(res);
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}
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}
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return Status::OK;
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}
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void RunServer(const std::string& port, int thread_num, const char* model_path) {
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std::string server_address;
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server_address = "0.0.0.0:" + port;
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ASRServicer service(model_path, thread_num);
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ServerBuilder builder;
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builder.AddListeningPort(server_address, grpc::InsecureServerCredentials());
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builder.RegisterService(&service);
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std::unique_ptr<Server> server(builder.BuildAndStart());
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std::cout << "Server listening on " << server_address << std::endl;
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server->Wait();
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}
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int main(int argc, char* argv[]) {
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if (argc < 3)
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{
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printf("Usage: %s port thread_num /path/to/model_file\n", argv[0]);
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exit(-1);
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}
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RunServer(argv[1], atoi(argv[2]), argv[3]);
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return 0;
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}
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