python/FunASR-XL.git

New file
			@@ -0,0 +1,361 @@
			/**
			* Copyright FunASR (https://github.com/alibaba-damo-academy/FunASR). All Rights
			* Reserved. MIT License (https://opensource.org/licenses/MIT)
			*/
			/* 2022-2023 by zhaomingwork */

			// websocket server for asr engine
			// take some ideas from https://github.com/k2-fsa/sherpa-onnx
			// online-websocket-server-impl.cc, thanks. The websocket server has two threads
			// pools, one for handle network data and one for asr decoder.
			// now only support offline engine.

			#include "websocket-server-2pass.h"

			#include <thread>
			#include <utility>
			#include <vector>

			context_ptr WebSocketServer::on_tls_init(tls_mode mode,
			websocketpp::connection_hdl hdl,
			std::string& s_certfile,
			std::string& s_keyfile) {
			namespace asio = websocketpp::lib::asio;

			LOG(INFO) << "on_tls_init called with hdl: " << hdl.lock().get();
			LOG(INFO) << "using TLS mode: "
			<< (mode == MOZILLA_MODERN ? "Mozilla Modern"
			: "Mozilla Intermediate");

			context_ptr ctx = websocketpp::lib::make_shared<asio::ssl::context>(
			asio::ssl::context::sslv23);

			try {
			if (mode == MOZILLA_MODERN) {
			// Modern disables TLSv1
			ctx->set_options(
			asio::ssl::context::default_workarounds \|
			asio::ssl::context::no_sslv2 \| asio::ssl::context::no_sslv3 \|
			asio::ssl::context::no_tlsv1 \| asio::ssl::context::single_dh_use);
			} else {
			ctx->set_options(asio::ssl::context::default_workarounds \|
			asio::ssl::context::no_sslv2 \|
			asio::ssl::context::no_sslv3 \|
			asio::ssl::context::single_dh_use);
			}

			ctx->use_certificate_chain_file(s_certfile);
			ctx->use_private_key_file(s_keyfile, asio::ssl::context::pem);

			} catch (std::exception& e) {
			LOG(INFO) << "Exception: " << e.what();
			}
			return ctx;
			}

			nlohmann::json handle_result(FUNASR_RESULT result, nlohmann::json msg) {

			websocketpp::lib::error_code ec;
			nlohmann::json jsonresult;
			jsonresult["text"]="";

			std::string tmp_online_msg = FunASRGetResult(result, 0);
			if (tmp_online_msg != "") {
			LOG(INFO) << "online_res :" << tmp_online_msg;
			jsonresult["text"] = tmp_online_msg;
			jsonresult["mode"] = "2pass-online";
			}
			std::string tmp_tpass_msg = FunASRGetTpassResult(result, 0);
			if (tmp_tpass_msg != "") {
			LOG(INFO) << "offline results : " << tmp_tpass_msg;
			jsonresult["text"] = tmp_tpass_msg;
			jsonresult["mode"] = "2pass-offline";
			}

			if (msg.contains("wav_name")) {
			jsonresult["wav_name"] = msg["wav_name"];
			}

			return jsonresult;
			}
			// feed buffer to asr engine for decoder
			void WebSocketServer::do_decoder(
			std::vector<char>& buffer, websocketpp::connection_hdl& hdl,
			nlohmann::json& msg, std::vector<std::vector<std::string>>& punc_cache,
			websocketpp::lib::mutex& thread_lock, bool& is_final,
			FUNASR_HANDLE& tpass_online_handle) {

			// lock for each connection
			scoped_lock guard(thread_lock);
			FUNASR_RESULT Result = nullptr;
			int asr_mode_ = 2;
			if (msg.contains("mode")) {
			std::string modeltype = msg["mode"];
			if (modeltype == "offline") {
			asr_mode_ = 0;
			} else if (modeltype == "online") {
			asr_mode_ = 1;
			} else if (modeltype == "2pass") {
			asr_mode_ = 2;
			}
			} else {
			// default value
			msg["mode"] = "2pass";
			asr_mode_ = 2;
			}

			try {
			// loop to send chunk_size 800*2 data to asr engine. TODO: chunk_size need get from client
			while (buffer.size() >= 800 * 2) {
			std::vector<char> subvector = {buffer.begin(),
			buffer.begin() + 800 * 2};
			buffer.erase(buffer.begin(), buffer.begin() + 800 * 2);

			try{
			Result =
			FunTpassInferBuffer(tpass_handle, tpass_online_handle,
			subvector.data(), subvector.size(), punc_cache,
			false, msg["audio_fs"], msg["wav_format"], (ASR_TYPE)asr_mode_);
			}catch (std::exception const &e)
			{
			LOG(ERROR)<<e.what();
			}
			if (Result) {
			websocketpp::lib::error_code ec;
			nlohmann::json jsonresult =
			handle_result(Result, msg["wav_name"]);
			jsonresult["is_final"] = false;
			if(jsonresult["text"] != "") {
			if (is_ssl) {
			wss_server_->send(hdl, jsonresult.dump(),
			websocketpp::frame::opcode::text, ec);
			} else {
			server_->send(hdl, jsonresult.dump(),
			websocketpp::frame::opcode::text, ec);
			}
			}
			FunASRFreeResult(Result);
			}

			}
			if(is_final){

			try{
			Result = FunTpassInferBuffer(tpass_handle, tpass_online_handle,
			buffer.data(), buffer.size(), punc_cache,
			is_final, msg["audio_fs"], msg["wav_format"], (ASR_TYPE)asr_mode_);
			}catch (std::exception const &e)
			{
			LOG(ERROR)<<e.what();
			}
			for(auto &vec:punc_cache){
			vec.clear();
			}
			if (Result) {
			websocketpp::lib::error_code ec;
			nlohmann::json jsonresult =
			handle_result(Result, msg["wav_name"]);
			jsonresult["is_final"] = true;
			if (is_ssl) {
			wss_server_->send(hdl, jsonresult.dump(),
			websocketpp::frame::opcode::text, ec);
			} else {
			server_->send(hdl, jsonresult.dump(),
			websocketpp::frame::opcode::text, ec);
			}
			FunASRFreeResult(Result);
			}
			}

			} catch (std::exception const& e) {
			std::cerr << "Error: " << e.what() << std::endl;
			}
			}

			void WebSocketServer::on_open(websocketpp::connection_hdl hdl) {
			scoped_lock guard(m_lock); // for threads safty
			check_and_clean_connection(); // remove closed connection

			std::shared_ptr<FUNASR_MESSAGE> data_msg =
			std::make_shared<FUNASR_MESSAGE>(); // put a new data vector for new
			// connection
			data_msg->samples = std::make_shared<std::vector<char>>();
			data_msg->thread_lock = new websocketpp::lib::mutex();

			data_msg->msg = nlohmann::json::parse("{}");
			data_msg->msg["wav_format"] = "pcm";
			data_msg->msg["audio_fs"] = 16000;
			data_msg->punc_cache =
			std::make_shared<std::vector<std::vector<std::string>>>(2);
			// std::vector<int> chunk_size = {5, 10, 5}; //TODO, need get from client
			// FUNASR_HANDLE tpass_online_handle =
			// FunTpassOnlineInit(tpass_handle, chunk_size);
			// data_msg->tpass_online_handle = tpass_online_handle;
			data_map.emplace(hdl, data_msg);
			LOG(INFO) << "on_open, active connections: " << data_map.size();

			}

			void WebSocketServer::on_close(websocketpp::connection_hdl hdl) {
			scoped_lock guard(m_lock);
			std::shared_ptr<FUNASR_MESSAGE> data_msg = nullptr;
			auto it_data = data_map.find(hdl);
			if (it_data != data_map.end()) {
			data_msg = it_data->second;
			}
			else
			{
			return;
			}
			scoped_lock guard_decoder(*(data_msg->thread_lock)); //wait for do_decoder finished and avoid access freed tpass_online_handle
			FunTpassOnlineUninit(data_msg->tpass_online_handle);
			data_map.erase(hdl); // remove data vector when connection is closed
			LOG(INFO) << "on_close, active connections: "<< data_map.size();
			}

			// remove closed connection
			void WebSocketServer::check_and_clean_connection() {
			std::vector<websocketpp::connection_hdl> to_remove; // remove list
			auto iter = data_map.begin();
			while (iter != data_map.end()) { // loop to find closed connection
			websocketpp::connection_hdl hdl = iter->first;

			if (is_ssl) {
			wss_server::connection_ptr con = wss_server_->get_con_from_hdl(hdl);
			if (con->get_state() != 1) { // session::state::open ==1
			to_remove.push_back(hdl);
			}
			} else {
			server::connection_ptr con = server_->get_con_from_hdl(hdl);
			if (con->get_state() != 1) { // session::state::open ==1
			to_remove.push_back(hdl);
			}
			}

			iter++;
			}
			for (auto hdl : to_remove) {
			data_map.erase(hdl);
			LOG(INFO) << "remove one connection ";
			}
			}
			void WebSocketServer::on_message(websocketpp::connection_hdl hdl,
			message_ptr msg) {
			unique_lock lock(m_lock);
			// find the sample data vector according to one connection

			std::shared_ptr<FUNASR_MESSAGE> msg_data = nullptr;

			auto it_data = data_map.find(hdl);
			if (it_data != data_map.end()) {
			msg_data = it_data->second;
			}

			std::shared_ptr<std::vector<char>> sample_data_p = msg_data->samples;
			std::shared_ptr<std::vector<std::vector<std::string>>> punc_cache_p =
			msg_data->punc_cache;
			websocketpp::lib::mutex* thread_lock_p = msg_data->thread_lock;

			lock.unlock();

			if (sample_data_p == nullptr) {
			LOG(INFO) << "error when fetch sample data vector";
			return;
			}

			const std::string& payload = msg->get_payload(); // get msg type

			switch (msg->get_opcode()) {
			case websocketpp::frame::opcode::text: {
			nlohmann::json jsonresult = nlohmann::json::parse(payload);

			if (jsonresult.contains("wav_name")) {
			msg_data->msg["wav_name"] = jsonresult["wav_name"];
			}
			if (jsonresult.contains("mode")) {
			msg_data->msg["mode"] = jsonresult["mode"];
			}
			if (jsonresult.contains("wav_format")) {
			msg_data->msg["wav_format"] = jsonresult["wav_format"];
			}
			if (jsonresult.contains("audio_fs")) {
			msg_data->msg["audio_fs"] = jsonresult["audio_fs"];
			}
			if (jsonresult.contains("chunk_size")){
			if(msg_data->tpass_online_handle == NULL){
			std::vector<int> chunk_size_vec = jsonresult["chunk_size"].get<std::vector<int>>();
			FUNASR_HANDLE tpass_online_handle =
			FunTpassOnlineInit(tpass_handle, chunk_size_vec);
			msg_data->tpass_online_handle = tpass_online_handle;
			}
			}
			LOG(INFO) << "jsonresult=" << jsonresult << ", msg_data->msg="
			<< msg_data->msg;
			if (jsonresult["is_speaking"] == false \|\|
			jsonresult["is_finished"] == true) {
			LOG(INFO) << "client done";

			// if it is in final message, post the sample_data to decode
			asio::post(
			io_decoder_,
			std::bind(&WebSocketServer::do_decoder, this,
			std::move(*(sample_data_p.get())), std::move(hdl),
			std::ref(msg_data->msg), std::ref(*(punc_cache_p.get())),
			std::ref(*thread_lock_p), std::move(true),
			std::ref(msg_data->tpass_online_handle)));
			}
			break;
			}
			case websocketpp::frame::opcode::binary: {
			// recived binary data
			const auto* pcm_data = static_cast<const char*>(payload.data());
			int32_t num_samples = payload.size();

			if (isonline) {
			sample_data_p->insert(sample_data_p->end(), pcm_data,
			pcm_data + num_samples);
			int setpsize = 800 * 2; // TODO, need get from client
			// if sample_data size > setpsize, we post data to decode
			if (sample_data_p->size() > setpsize) {
			int chunksize = floor(sample_data_p->size() / setpsize);
			// make sure the subvector size is an integer multiple of setpsize
			std::vector<char> subvector = {
			sample_data_p->begin(),
			sample_data_p->begin() + chunksize * setpsize};
			// keep remain in sample_data
			sample_data_p->erase(sample_data_p->begin(),
			sample_data_p->begin() + chunksize * setpsize);
			// post to decode
			asio::post(io_decoder_,
			std::bind(&WebSocketServer::do_decoder, this,
			std::move(subvector), std::move(hdl),
			std::ref(msg_data->msg),
			std::ref(*(punc_cache_p.get())),
			std::ref(*thread_lock_p), std::move(false),
			std::ref(msg_data->tpass_online_handle)));
			}
			} else {
			sample_data_p->insert(sample_data_p->end(), pcm_data,
			pcm_data + num_samples);
			}
			break;
			}
			default:
			break;
			}
			}

			// init asr model
			void WebSocketServer::initAsr(std::map<std::string, std::string>& model_path,
			int thread_num) {
			try {
			tpass_handle = FunTpassInit(model_path, thread_num);
			if (!tpass_handle) {
			LOG(ERROR) << "FunTpassInit init failed";
			exit(-1);
			}

			} catch (const std::exception& e) {
			LOG(INFO) << e.what();
			}
			}