tencent cloud

// Set the rendering parameters of local preview: Flip the video horizontally and use the fill mode
trtcCloud.setLocalRenderParams(TRTCRenderParams(
    fillMode: TRTCCloudDef.TRTC_VIDEO_RENDER_MODE_FILL
    mirrorType: TRTCCloudDef.TRTC_VIDEO_MIRROR_TYPE_ENABLE);
    
// Initiate preview for the local camera (`viewId` denotes the unique view identifier granted during the `onViewCreated` function call in the `TRTCCloudVideoView` creation procedure)
trtcCloud.startLocalPreview(isFrontCamera, viewId);

// Use `TXDeviceManager` to enable autofocus and turn on the flash
bool? isAutoFocusEnabled = await manager.isAutoFocusEnabled();
if (isAutoFocusEnabled ?? false) {
  manager.enableCameraAutoFocus(true);
}
manager.enableCameraTorch(true);

// Enable mic capture and set `quality` to `SPEECH` (strong in noise suppression and adapts well to poor network conditions)
trtcCloud.startLocalAudio(TRTCCloudDef.TRTC_AUDIO_QUALITY_SPEECH );

// Enable mic capture and set `quality` to `MUSIC` (high fidelity, minimum audio quality loss, recommended if a high-end sound card is used)
trtcCloud.startLocalAudio(TRTCCloudDef.TRTC_AUDIO_QUALITY_MUSIC);

// Create a TRTCCloud singleton
trtcCloud = (await TRTCCloud.sharedInstance())!;
// Register TRTC event callback
trtcCloud.registerListener(onRtcListener);

enterRoom() async {
  try {
    userInfo['userSig'] =
        await GenerateTestUserSig.genTestSig(userInfo['userId']);
    meetModel.setUserInfo(userInfo);
  } catch (err) {
    userInfo['userSig'] = '';
    print(err);
  }
  // If your scenario is "interactive video live broadcast", please set the scene to TRTC_APP_SCENE_LIVE, and set the appropriate value for the role field in TRTCParams.
  await trtcCloud.enterRoom(
      TRTCParams(
          sdkAppId: GenerateTestUserSig.sdkAppId,
          userId: userInfo['userId'],
          userSig: userInfo['userSig'],
          role: TRTCCloudDef.TRTCRoleAnchor,
          roomId: meetId!),
      TRTCCloudDef.TRTC_APP_SCENE_LIVE);
}  

// If your current role is audience, you need to call `switchRole` first to switch to anchor
// If your current role is 'audience', you need to call switchRole to switch to 'anchor' first
trtcCloud.switchRole(TRTCCloudDef.TRTCRoleAnchor);
trtcCloud.startLocalAudio(TRTCCloudDef.TRTC_AUDIO_QUALITY_DEFAULT);
trtcCloud.startLocalPreview(true, cameraVideo);

// If role switch failed, the error code of the `onSwitchRole` callback is not `0`
// If switching operation failed, the error code of the 'onSwitchRole' is not zero
onRtcListener(type, param) async {
  if (type == TRTCCloudListener.onSwitchRole) {
    if (param['errCode'] != 0) {
      // TO DO
    }
  }
}