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Unity

This article will introduce how to quickly integrate the Unity RTC Engine and implement a basic audio and video call.
Environment preparations
Unity 2022.3.13f1.
Currently supports Android, iOS, Windows, Mac platforms.
Unity needs to include Android Build Support, iOS Build Support, Windows Build Support and MacOs Build Support modules.
For iOS development, please make sure your project has a valid developer signature.
Integration guideline
Step 1. Import TRTC SDK
1. Open Unity and create your own Unity program.
2. Download the Unity SDK and unzip the SDK library containing the following files:
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3. Copy the files Plugins and TRTCSDK in the Assets directory of the decompressed SDK to the Assets file directory of your project.
Step 2. Configure project
iOS / Mac / Android need to add requests for camera and mic permissions in the project:
iOS/Mac
Android
1. Open the Player settings interface of Project Settings in the Unity project.
2. Add the description statements of the corresponding permission application to Camera Usage Description and Microphone Usage Description of the MAC/iOS platform respectively as shown in the following figure.
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1. Open the AndroidManifest.xml file in your project.
2. Add the following permissions:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera.autofocus" />
Step 3. Create TRTC instance
1. Import TRTC namespace.
using trtc;
2. Inherit ITRTCCloudCallback and override ITRTCCloudCallback method to declare and define TRTCCloud events.
public class AppExample : MonoBehaviour,
                          ITRTCCloudCallback {
private ITRTCCloud mTRTCCloud;  // Declare the TRTCCloud member variable
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#region ITRTCCloudCallback
public:
	public void onError(TXLiteAVError errCode, String errMsg, IntPtr arg) {} // Listen for the 'onError' event
    public void onWarning(TXLiteAVWarning warningCode, String warningMsg, IntPtr arg) {} // Listen for the 'onWarning' event
    public void onEnterRoom(int result) {} // Listen for the result of 'onEnterRoom' event
    public void onExitRoom(int reason) {}  // Listen for the result of 'onExitRoom' event
    //  to do other event.........
 #endregion
}
3. Call the interface to obtain the TRTC instance.
mTRTCCloud = ITRTCCloud.getTRTCShareInstance();
4. Call the addCallback interface to add listeners for TRTCCloud events.
mTRTCCloud.addCallback(this);
Step 4. Enter the room
1. Set the entry parameter TRTCParams and call enterRoom to successfully enter the room.
Parameter
Type
Description
sdkAppId
UInt32
The sdkAppId of the audio and video application you created in TRTC Console.
userId
String
User ID specified by you.
userSig
String
User signature, refer to UserSig.
roomId
UInt32
Room ID specified by you, usually a unique room ID. 
For more detailed parameter descriptions,  please refer to the interface document enterRoom.
TRTCParams trtcParams = new TRTCParams();
trtcParams.sdkAppId = 1400xxxxx;
trtcParams.roomId = 345;
trtcParams.userId = "123";
trtcParams.userSig = "";
TRTCAppScene scene = TRTCAppScene.TRTCAppSceneLIVE;
mTRTCCloud.enterRoom(ref trtcParams, scene);
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public void onEnterRoom(int result) {} // Listen for the result of 'onEnterRoom' event
Step 5. Turn on/off Camera
1. Create a component RawImage: videoView in the Unity project as the value of the startLocalPreview interface parameter view.
2. Before calling the interface startLocalPreview to open the camera preview, you can set the local preview rendering parameters by calling the interface setLocalRenderParams.
// Set local preview rendering parameters
private TRTCRenderParams renderParams = new TRTCRenderParams();
renderParams.fillMode = TRTCVideoFillMode.TRTCVideoFillMode_Fit;
renderParams.mirrorType = TRTCVideoMirrorType.TRTCVideoMirrorType_Disable;
renderParams.rotation = TRTCVideoRotation.TRTCVideoRotation0;
mTRTCCloud.setLocalRenderParams(renderParams);
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// Local preview of the content captured by the front camera
mTRTCCloud.startLocalPreview(true, videoView);
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// Local preview of the content captured by the rear camera
mTRTCCloud.startLocalPreview(false, videoView);
3. Call stopLocalPreview to close the camera preview and stop pushing local video information.
mTRTCCloud.stopLocalPreview();
Step 6. Turn on/off Microphone
1. Call the startLocalAudio to turn on microphone capture. Select one of the following sound Quality parameters according to your requirements.
// Enable microphone acquisition and set the current scene to: Voice mode 
// For high noise suppression capability, strong and weak network resistance
mTRTCCloud.startLocalAudio(TRTCAudioQuality.TRTCAudioQualitySpeech);
// Enable microphone acquisition, and set the current scene to: Music mode 
// For high fidelity acquisition, low sound quality loss, recommended to use with professional sound cards
mTRTCCloud.startLocalAudio(TRTCAudioQuality.TRTCAudioQualityMusic);
2. Call stopLocalAudio to turn off microphone collection and stop pushing local audio information.
mTRTCCloud.stopLocalAudio()
Step 7. Play/stop Video Streaming
1. Listen for the onUserVideoAvailable before entering the room. When you receive the onUserVideoAvailable(userId, true) notification, it indicates that playable video frames are available for that user's video stream.
public void onUserVideoAvailable(String userId, bool available) {
}
2. Call startRemoteView/stopRemoteView to play or stop the remote video.
mTRTCCloud.startRemoteView(“denny”, TRTCVideoStreamType.TRTCVideoStreamTypeBig, videoView);
// videoView is the RawImage component of Unity
3. Call stopRemoteView to stop playing the remote image.
mTRTCCloud.stopRemoteView(”denny“, TRTCVideoStreamType.TRTCVideoStreamTypeBig);  // Stop playing denny's video
mTRTCCloud.stopAllRemoteView(true); // Mute all remote users
Step 8. Play/stop Audio Streaming
Call muteRemoteAudio to mute or unmute the remote sound.
// Mute
mTRTCCloud.muteRemoteAudio("denny", true); // Mute denny
mTRTCCloud.muteAllRemoteAudio(true); // Mute all remote users
// Unmute
mTRTCCloud.muteRemoteAudio("denny", false); // Unmute denny
mTRTCCloud.muteAllRemoteAudio(false); // Unmute all remote users
Step 9. Exit the room
1. Call exitRoom to exit the current room.
mTRTCCloud.exitRoom();
2. TRTC SDK will notify you through the onExitRoom callback event after exiting the room.
public void onExitRoom(int reason) {}  // Listen for the result of 'onExitRoom' event
FAQs
API Reference at API Reference.
Contact us
If you have any suggestions or feedback, please contact info_rtc@tencent.com.
Parameter	Type	Description
sdkAppId	UInt32	The sdkAppId of the audio and video application you created in TRTC Console.
userId	String	User ID specified by you.
userSig	String	User signature, refer to UserSig.
roomId	UInt32	Room ID specified by you, usually a unique room ID.