使用实时语音识别

前提条件

• 确保已按照配置CPP环境（Windows）配置完毕。

初始化Client

初始化RasrClient，其参数包括AuthInfo。

请求参数

请求类为RasrRequest，详见表 RasrRequest。

通过set方法可以设置具体参数，详见表 RasrRequest设置参数

示例代码

如下示例仅供参考，最新代码请前往SDK（websocket）章节获取并运行。

#include <iostream>

#include "RasrClient.h"
#include "RasrRequest.h"
#include "IoUtil.h"


void OnConnect() {
	std::cout << "now rasr Connect success" << std::endl;
}

void OnStart(std::string text) {
	std::cout << "now rasr receive start response: " << text << std::endl;
}

void OnResp(std::string text) {
	// text encoded by utf-8 contains chinese character, which will cause error code. So we should convert to ansi
	// cout << "rasr receive " << text << endl;
	std::cout << "now rasr receive " << Utf8ToAnsi(text) << std::endl;
}

void OnEnd(std::string text) {
	std::cout << "now rasr receive end response: " << text << std::endl;
}


void OnClose() {
	std::cout << "now rasr receive Close" << std::endl;
}

void OnError(string text) {
	std::cout << "now rasr receive error: " << text << std::endl;
}

void OnEvent(string text) {
	std::cout << "now rasr receive event: " << text << std::endl;
}

void RasrTest() {
	// 1. config parameter
	// 1.1 init authInfo
        // 认证用的ak和sk硬编码到代码中或者明文存储都有很大的安全风险，建议在配置文件或者环境变量中密文存放，使用时解密，确保安全;
        // 本示例以ak和sk保存在环境变量中来实现身份验证为例，运行本示例前请先在本地环境中设置环境变量HUAWEICLOUD_SDK_AK和HUAWEICLOUD_SDK_SK。
	std::string ak = GetEnv("HUAWEICLOUD_SDK_AK");
	std::string sk = GetEnv("HUAWEICLOUD_SDK_SK");
	string region = "";
	string projectId = "";
	AuthInfo authInfo(ak, sk, region, projectId);

	// 1.2 config Connect parameter
	HttpConfig httpConfig;
	httpConfig.SetReadTimeout(20000);
	httpConfig.SetConnectTimeout(20000);

	// 1.3 config callback, callback function are optional, if not set, it will use function in RasrListener
	WebsocketService::ptr websocketServicePtr = websocketpp::lib::make_shared<WebsocketService>();
	websocketServicePtr->SetOnConnectFunc(OnConnect);       // Connect success callback
	websocketServicePtr->SetOnStartFunc(OnStart);				// receive start response callback
	websocketServicePtr->SetOnRespFunc(OnResp);             // receive transcribe result callback
	websocketServicePtr->SetOnEndFunc(OnEnd);               // receive end response callback
	websocketServicePtr->SetOnCloseFunc(OnClose);           // Close callback
	websocketServicePtr->SetOnEventFunc(OnEvent);           // receive event callback
	websocketServicePtr->SetOnErrorFunc(OnError);           // receive error callback

	// 1.4 config request parameter
	RasrRequest request("pcm16k16bit", "chinese_16k_general");
	request.SetIntermediateResult("no");


	// 2. init client
	RasrClient* rasrClient = new RasrClient(authInfo, websocketServicePtr, httpConfig);
	
	// 3. create connection :ContinueStreamConnect/ShortStreamConnect/SentenceStreamConnect
	rasrClient->ContinueStreamConnect();

	// 4. send start
	rasrClient->SendStart(request);
	
	// 5. send binary audio. (filePtr, fileLength, byteLen, SleepTime ). If the audio is generated by recording, then it should set sleep time 0.
	int fileLength;
	std::string filePath = "../sisCppSdkDemo/123.wav";
	unsigned char* buff = ReadBinary(filePath, &fileLength);
	if (buff == nullptr) {
		cout << filePath << " read file failed";
		rasrClient->Close();
		delete rasrClient;
		return;
	}
	rasrClient->SendBinary(buff, fileLength, 3200, 50);

	// 6. send end
	rasrClient->SendEnd();

	// 7. close
	rasrClient->Close();

	delete[] buff;
	delete rasrClient;
}

int main() {
	RasrTest();
	return 0;
}