TRTCLiveRoom APIs (Flutter)
TRTCLiveRoom is based on Tencent Real-Time Communication (TRTC) and Tencent Cloud Chat. With TRTCLiveRoom:A user can create a room and start live streaming, or enter a room as an audience member.
The anchor can co-anchor with audience members in the room.
Anchors in two rooms can compete and interact with each other.
All users can send text and custom messages. Custom messages can be used to send on-screen comments, give likes, and send gifts.
Note
TRTCLiveRoom is an open-source class depending on two closed-source Tencent Cloud SDKs. For the specific implementation process, see Interactive Live Video Streaming (Flutter).The TRTC SDK is used as a low-latency live streaming component.
The
AVChatRoom feature of the Chat SDK is used to implement chat rooms, and Chat messages are used to facilitate the co-anchoring process.
TRTCLiveRoom API Overview
Basic SDK APIs
API | Description |
Gets a singleton object. | |
Terminates a singleton object. | |
Registers an event listener. | |
Removes an event listener. | |
Logs in. | |
Logs out. | |
Sets profile. |
Room APIs
API | Description |
Creates a room (called by anchor). If the room does not exist, the system will automatically create a room. | |
Closes a room (called by anchor). | |
Enters a room (called by audience). | |
Exits a room (called by audience). | |
Gets room list details. | |
Gets the anchor and co-anchors in a room. This API works only if it is called after enterRoom(). | |
Gets the list of all users in a room. This API works only if it is called after enterRoom(). |
Stream pushing/pulling APIs
API | Description |
Enables preview of the local video. | |
Stops local video capturing and preview. | |
Starts live streaming (pushing streams). | |
Stops live streaming (pushing streams). | |
Plays a remote video. This API can be called in common playback and co-anchoring scenarios. | |
Stops rendering a remote video. |
APIs for anchor-audience co-anchoring
API | Description |
Requests co-anchoring (called by audience). | |
Responds to a co-anchoring request (called by anchor). | |
Removes a user from co-anchoring (called by anchor). |
APIs for cross-room anchor communication
API | Description |
Sends a cross-room communication request (called by anchor). | |
Responds to a cross-room communication request (called by anchor). | |
Quits cross-room communication. |
Audio/Video APIs
API | Description |
Switches between the front and rear cameras. | |
Sets the mirror mode. | |
Mutes/Unmutes the local user. | |
Mutes/Unmutes a remote user. | |
Mutes/Unmutes all remote users. |
Background music and audio effect APIs
API | Description |
Beauty filter APIs
API | Description |
Message sending APIs
API | Description |
Broadcasts a text chat message in a room. This API is generally used for on-screen comments. | |
Sends a custom text message. |
TRTCLiveRoomDelegate API Overview
Common event callbacks
API | Description |
Callback for error. | |
Callback for warning. | |
You were kicked offline because another user logged in to the account. |
Room event callback APIs
API | Description |
You entered the room. | |
Whether a remote user has playable video in the primary stream (usually used for camera images) | |
The room was closed. |
Callback APIs for entry/exit of anchors/audience
API | Description |
There is a new anchor/co-anchoring viewer in the room. | |
An anchor/co-anchoring viewer quit cross-room communication/co-anchoring. | |
An audience member entered the room. | |
An audience member left the room. |
Callback APIs for anchor-audience co-anchoring events
API | Description |
A co-anchoring request was received. | |
The co-anchoring request was accepted. | |
The co-anchoring request was rejected. | |
A user was removed from co-anchoring. |
Callback APIs for cross-room communication events
API | Description |
A cross-room communication request was received. | |
The cross-room communication request was accepted. | |
The cross-room communication request was rejected. | |
The cross-room communication ended. |
Message event callback APIs
API | Description |
A text message was received. | |
A custom message was received. |
Basic SDK APIs
sharedInstance
This API is used to get the TRTCLiveRoom singleton object.
static Future<TRTCLiveRoom> sharedInstance()
destroySharedInstance
This API is used to terminate the TRTCLiveRoom singleton object.
Note
After the instance is terminated, the externally cached
TRTCLiveRoom instance can no longer be used. You need to call sharedInstance again to get a new instance.static void destroySharedInstance()
registerListener
This API is used to get the event callback of TRTCLiveRoom. You can use
TRTCLiveRoomDelegate to get various status notifications of TRTCLiveRoom.void registerListener(VoiceListenerFunc func);
Note
registerListener is the delegate callback of TRTCLiveRoom. unRegisterListener
This API is used to remove the event listener.
void unRegisterListener(VoiceListenerFunc func);
login
Login
Future<ActionCallback> login(int sdkAppId, String userId, String userSig, TRTCLiveRoomConfig config);
The parameters are described below:
Parameter | Type | Description |
sdkAppId | int | |
userId | String | The ID of the current user, which is a string that can contain only letters (a-z and A-Z), digits (0-9), hyphens (-), and underscores (_). |
userSig | String | Tencent Cloud's proprietary security signature. For how to calculate and use it, see FAQs > UserSig. |
config | TRTCLiveRoomConfig | Global configuration information, which needs to be initialized during login and cannot be modified afterward. useCDNFirst: Specifies the way the audience watches live streams. true means watching over CDNs, which is cost-efficient but has high latency. false means watching under the low latency mode, the cost of which is between that of CDN live streaming and co-anchoring, but the latency is lower than 1 second. CDNPlayDomain: Specifies the domain name for CDN live streaming. It takes effect only if useCDNFirst is set to true. You can set it in Domain Management of the CSS console. |
logout
Log out
Future<ActionCallback> logout();
setSelfProfile
This API is used to set the profile.
Future<ActionCallback> setSelfProfile(String userName, String avatarURL);
The parameters are described below:
Parameter | Type | Description |
userName | String | Nickname |
avatarURL | String | Profile photo URL |
Room APIs
createRoom
This API is used to create a room (called by anchor).
Future<ActionCallback> createRoom(int roomId, TRTCCreateRoomParam roomParam);
The parameters are described below:
Parameter | Type | Description |
roomId | int | The room ID. You need to assign and manage the IDs in a centralized manner. Multiple roomId values can be aggregated into a live room list. Currently, Tencent Cloud does not provide list management services. Please manage your own room lists. |
roomParam | RoomParam | Room information, such as room name and cover information. If both the room list and room information are managed on your server, you can ignore this parameter. |
The process of creating a room and starting live streaming as an anchor is as follows:
1. A user calls
startCameraPreview() to enable camera preview and set beauty filters. 2. The user calls
createRoom() to create a room, the result of which is returned via the ActionCallback callback.3. The user calls
startPublish() to push streams.destroyRoom
This API is used to terminate a room (called by anchor).
Future<ActionCallback> destroyRoom();
enterRoom
This API is used to enter a room (called by audience).
Future<ActionCallback> enterRoom(int roomId);
The parameters are described below:
Parameter | Type | Description |
roomId | int | The room ID. |
The process of entering a room and starting playback as an audience member is as follows:
1. A user gets the latest room list from your server. The list may contain the
roomID and other information of multiple rooms.2. The user selects a room and calls
enterRoom() to enter the room.3. The user calls
startPlay(userId), passing in the anchor’s userId to start playback.If the room list contains the anchor’s
userId, the user can call startPlay(userId) to start playback.If the user does not have the anchor's
userId before room entry, he or she can find it in the onAnchorEnter(userId) callback of TRTCLiveRoomDelegate, which is returned after room entry. The user can then call startPlay(userId) to start playback.exitRoom
This API is used to leave a room.
Future<ActionCallback> exitRoom();
getRoomInfos
This API is used to get room list details, which are set by anchors via
roomInfo when they call createRoom().Note
You don’t need this API if both the room list and room information are managed on your server.
Future<RoomInfoCallback> getRoomInfos(List<String> roomIdList);
The parameters are described below:
Parameter | Type | Description |
roomIdList | List<String> | Room ID list |
getAnchorList
This API is used to get the anchors and co-anchoring viewers in a room. It takes effect only if it is called after
enterRoom().Future<UserListCallback> getAnchorList();
getRoomMemberList
This API is used to get the information of all audience members in a room. It takes effect only if it is called after
enterRoom().Future<UserListCallback> getRoomMemberList(int nextSeq)
The parameters are described below:
Parameter | Type | Description |
nextSeq | int | Pulling-by-page flag. It is set to 0 when the information is pulled for the first time. If the callback succeeds and nextSeq is not 0, pagination is needed. The value of this field is passed in for the next pull until the value becomes 0. |
Stream Pushing/Pulling APIs
startCameraPreview
This API is used to enable local video preview.
Future<void> startCameraPreview(bool isFrontCamera, int viewId);
The parameters are described below:
Parameter | Type | Description |
isFrontCamera | bool | true: Front camera; false: Rear camera. |
viewId | int | Called back video view ID |
stopCameraPreview
This API is used to stop local video capturing and preview.
Future<void> stopCameraPreview();
startPublish
This API is used to start live streaming (pushing streams), which can be called in the following scenarios:
An anchor starts live streaming.
A viewer starts co-anchoring.
Future<void> startPublish(String streamId);
The parameters are described below:
Parameter | Type | Description |
streamId | String? | The streamId used to bind live streaming CDNs. You need to specify the streamId of the anchor if you want the audience to recieve the anchor's streams via live streaming CDNs. |
stopPublish
This API is used to stop live streaming (pushing streams), which can be called in the following scenarios:
An anchor ends live streaming.
A viewer ends co-anchoring.
Future<void> stopPublish();
startPlay
This API is used to play a remote video. It can be called in common playback and co-anchoring scenarios.
Future<void> startPlay(String userId, int viewId);
The parameters are described below:
Parameter | Type | Description |
userId | String | The ID of the user whose video is to be played. |
viewId | int | Called back video view ID. |
Common playback:
If the room list contains anchors’
userId, after entering a room, a user can call startPlay(userId) to play the anchor's video.If audience do not have the anchor's
userId before room entry, they can find it in the onAnchorEnter(userId) callback of TRTCLiveRoomDelegate, which is returned after room entry. They can then call startPlay(userId) to play the anchor’s video.Co-anchoring:
After co-anchoring is initiated, the anchor will receive the
onAnchorEnter(userId) callback from TRTCLiveRoomDelegate and can call startPlay(userId), passing in the userId` returned by the callback to play co-anchoring video.stopPlay
This API is used to stop rendering a remote video. It needs to be called after the
onAnchorExit() callback is received.Future<void> stopPlay(String userId);
The parameters are described below:
Parameter | Type | Description |
userId | String | The ID of the remote user. |
APIs for Anchor-Audience Co-anchoring
requestJoinAnchor
This API is used to send a co-anchoring request (called by audience).
Future<ActionCallback> requestJoinAnchor();
The process of co-anchoring between anchors and audience members is as follows:
1. A viewer calls
requestJoinAnchor() to send a co-anchoring request to the anchor.2. The anchor receives the
onRequestJoinAnchor() callback of TRTCLiveRoomDelegate.3. The anchor calls
responseJoinAnchor() to accept or reject the co-anchoring request.4. The viewer receives the
responseCallback callback, which carries the anchor’s response.5. If the request is accepted, the viewer calls
startCameraPreview() to enable local camera preview.6. The viewer calls
startPublish() to push streams.7. After the viewer starts pushing streams, the anchor receives the
onAnchorEnter() callback of TRTCLiveRoomDelegate.8. The anchor calls
startPlay() to play the co-anchoring viewer’s video.9. If there are other viewers co-anchoring with the anchor in the room, the new co-anchoring viewer will receive the
onAnchorEnter() callback and can call startPlay() to play other co-anchoring viewers’ video.responseJoinAnchor
This API is used to respond to a co-anchoring request (called by anchor) after receiving the
onRequestJoinAnchor() callback of TRTCLiveRoomDelegate.Future<ActionCallback> responseJoinAnchor(String userId, boolean agreee);
The parameters are described below:
Parameter | Type | Description |
userId | String | The user ID of the audience member. |
agree | bool | true: Accept; false: Reject |
kickoutJoinAnchor
This API is used to remove a user from co-anchoring (called by anchor). The removed user will receive the
onKickoutJoinAnchor() callback of TRTCLiveRoomDelegate.Future<ActionCallback> kickoutJoinAnchor(String userId);
The parameters are described below:
Parameter | Type | Description |
userId | String | The ID of the co-anchoring user. |
APIs for Cross-Room Communication
requestRoomPK
This API is used to send a cross-room communication request (called by anchor).
Future<ActionCallback> requestRoomPK(int roomId, String userId);
The parameters are described below:
Parameter | Type | Description |
roomId | int | The Room ID of the anchor to call. |
userId | String | The user ID of the anchor to call. |
Anchors in different rooms can compete with each other. The process of starting cross-room competition between anchor A and anchor B is as follows:
1. Anchor A calls
requestRoomPK() to send a cross-room communication request to anchor B.2. Anchor B receives the
onRequestRoomPK() callback of TRTCLiveRoomDelegate.3. Anchor B calls
responseRoomPK() to respond to the cross-room communication request.4. If anchor B accepts the request, he or she would wait for the
onAnchorEnter() callback of TRTCLiveRoomDelegate and call startPlay() to play anchor A's video.5. Anchor A receives the
onRoomPKAccepted or onRoomPKRejected callback.6. If the request is accepted, anchor A waits for the
onAnchorEnter() callback of TRTCLiveRoomDelegate and calls startPlay() to play anchor B’s video.responseRoomPK
This API is used to respond to a cross-room communication request (called by anchor), after which the request sending anchor will receive the
responseCallback passed in to requestRoomPK.Future<ActionCallback> responseRoomPK(String userId, boolean agree);
The parameters are described below:
Parameter | Type | Description |
userId | String | The user ID of the anchor sending the communication request. |
agree | bool | true: Accept; false: Reject |
quitRoomPK
This API is used to quit cross-room communication. If either anchor quits cross-room communication, the other anchor will receive the
onQuitRoomPk() callback of TRTCLiveRoomDelegate.Future<ActionCallback> quitRoomPK();
Audio/Video APIs
switchCamera
This API is used to switch between the front and rear cameras.
Future<void> switchCamera(boolean isFrontCamera);
setMirror
This API is used to set the mirror mode.
Future<void> setMirror(boolean isMirror);
The parameters are described below:
Parameter | Type | Description |
isMirror | bool | Enables/Disables mirroring. |
muteLocalAudio
This API is used to mute or unmute the local user.
Future<void> muteLocalAudio(boolean mute);
The parameters are described below:
Parameter | Type | Description |
mute | boolean | true: Mute; false: Unmute |
muteRemoteAudio
This API is used to mute or unmute a remote user.
Future<void> muteRemoteAudio(String userId, boolean mute);
The parameters are described below:
Parameter | Type | Description |
userId | String | The ID of the remote user. |
mute | boolean | true: Mute; false: Unmute |
muteAllRemoteAudio
This API is used to mute or unmute all remote users.
Future<void> muteAllRemoteAudio(boolean mute);
The parameters are described below:
Parameter | Type | Description |
mute | boolean | true: Mute; false: Unmute |
Background Music and Audio Effect APIs
getAudioEffectManager
This API is used to get the background music and audio effect management object TXAudioEffectManager.
getAudioEffectManager();
Beauty Filter APIs
getBeautyManager
getBeautyManager();
You can do the following using
TXBeautyManager:Set the beauty filter style and apply effects including skin brightening, rosy skin, eye enlarging, face slimming, chin slimming, chin lengthening/shortening, face shortening, nose narrowing, eye brightening, teeth whitening, eye bag removal, wrinkle removal, and smile line removal.
Adjust the hairline, eye spacing, eye corners, lip shape, nose wings, nose position, lip thickness, and face shape.
Apply animated effects such as face widgets (materials).
Add makeup effects.
Recognize gestures.
Message Sending APIs
sendRoomTextMsg
This API is used to broadcast a text chat message in a room, which is generally used for on-screen comments.
Future<ActionCallback> sendRoomTextMsg(String message);
The parameters are described below:
Parameter | Type | Description |
message | String | A text message. |
sendRoomCustomMsg
This API is used to send a custom text message.
Future<ActionCallback> sendRoomCustomMsg(String cmd, String message);
The parameters are described below:
Parameter | Type | Description |
cmd | String | A custom command word used to distinguish between different message types |
message | String | Custom text message |
TRTCLiveRoomDelegate Event Callback APIs
Common Event Callback APIs
onError
Callback for error.
Note
This callback indicates that the SDK encountered an unrecoverable error. Such errors must be listened for, and UI reminders should be sent to users if necessary.
The parameters are described below:
Parameter | Type | Description |
errCode | int | Error code |
errMsg | String | Error message |
onWarning
Callback for warning.
The parameters are described below:
Parameter | Type | Description |
warningCode | int | Warning code |
warningMsg | String | Warning message |
onKickedOffline
Callback for being kicked offline because another user logged in to the same account.
Room Event Callback APIs
onRoomDestroy
Callback for room termination. All users in a room will receive this callback after the anchor leaves the room.
onEnterRoom
Callback for room entry by the local user.
The parameters are described below:
Parameter | Type | Description |
result | int | If result is greater than 0, it indicates the time (ms) room entry took; if result is less than 0, it represents the error code for room entry. |
onUserVideoAvailable
Callback for whether a remote user has playable video in the primary stream (usually used for camera images).
The parameters are described below:
Parameter | Type | Description |
userId | String | The user ID. |
available | boolean | Whether the user's video is enabled. |
Callback APIs for Entry/Exit of Anchors/Audience
onAnchorEnter
Callback for a new anchor/co-anchoring viewer. The audience will receive this callback when there is a new anchor/co-anchoring viewer in the room and can call
startPlay() of TRTCLiveRoom to play the video of the anchor/co-anchoring viewer.The parameters are described below:
Parameter | Type | Description |
userId | String | User ID of the new anchor/co-anchoring viewer |
userName | String | Username |
userAvatar | String | The address of the user profile photo. |
onAnchorExit
Callback for the quitting of an anchor/co-anchoring viewer. The anchors and co-anchoring viewers in a room will receive this callback after an anchor/co-anchoring viewer quits cross-room communication/co-anchoring and can call
stopPlay() of TRTCLiveRoom to stop playing the video of the anchor/co-anchoring viewer.The parameters are described below:
Parameter | Type | Description |
userId | String | ID of the user who quitted co-anchoring |
userName | String | Username |
userAvatar | String | The address of the user profile photo. |
onAudienceEnter
Callback for room entry by a viewer.
void onAudienceEnter(TRTCLiveRoomDef.TRTCLiveUserInfo userInfo);
The parameters are described below:
Parameter | Type | Description |
userInfo | TRTCLiveRoomDef.TRTCLiveUserInfo | Information of the viewer who enters the room, such as user ID, nickname, and profile photo. |
onAudienceExit
Callback for room exit by a viewer.
The parameters are described below:
Parameter | Type | Description |
userId | String | User ID of the viewer |
userName | String | Username |
userAvatar | String | The address of the user profile photo. |
onRequestJoinAnchor
Callback for receiving a co-anchoring request from a viewer.
The parameters are described below:
Parameter | Type | Description |
userId | String | ID of the request sending user |
userName | String | Username |
userAvatar | String | The address of the user profile photo. |
onAnchorAccepted
Callback for accepting a co-anchoring request.
The parameters are described below:
Parameter | Type | Description |
userId | String | User ID of the anchor |
onAnchorRejected
Callback for rejecting a co-anchoring request.
The parameters are described below:
Parameter | Type | Description |
userId | String | User ID of the anchor |
onKickoutJoinAnchor
Callback for being removed from co-anchoring. After receiving this callback, a co-anchoring viewer needs to call
stopPublish() of TRTCLiveRoom to quit co-anchoring.Callback APIs for Cross-Room Communication Events
onRequestRoomPK
Callback for receiving a cross-room communication request. If an anchor accepts the request, he or she should wait for the
onAnchorEnter() callback of TRTCLiveRoomDelegate and call startPlay() to play the other anchor’s video.The parameters are described below:
Parameter | Type | Description |
userId | String | User ID of the anchor sending the request |
userName | String | Username |
userAvatar | String | The address of the user profile photo. |
onRoomPKAccepted
Callback for accepting a cross-room communication request.
The parameters are described below:
Parameter | Type | Description |
userId | String | User ID of the anchor who accepted the request |
onRoomPKRejected
Callback for accepting a cross-room communication request.
The parameters are described below:
Parameter | Type | Description |
userId | String | User ID of the anchor who rejected the request |
onQuitRoomPK
Callback for ending cross-room communication.
Message Event Callback APIs
onRecvRoomTextMsg
A text chat message was received.
The parameters are described below:
Parameter | Type | Description |
message | String | Text message |
onRecvRoomCustomMsg
A custom message was received.
The parameters are described below:
Parameter | Type | Description |
command | String | Custom command word used to distinguish between different message types |
message | String | Custom text message |