4.Publish Audio/Video Streams

self.trtcCloud = [TRTCCloud sharedInstance];
// Set the preview mode of the local video image: Enable horizontal mirroring and set the fill mode for the video image
TRTCRenderParams *param = [[TRTCRenderParams alloc] init];
param.fillMode   = TRTCVideoFillMode_Fill;
param.mirrorType = TRTCVideoMirrorTypeAuto;
[self.trtcCloud setLocalRenderParams:param];

// Enable local camera preview (`localCameraVideoView` is the control used to render the local video image)
[self.trtcCloud startLocalPreview:YES view:localCameraVideoView];

// Use `TXDeviceManager` to enable autofocus and turn on the flash
TXDeviceManager *manager = [self.trtcCloud getDeviceManager];
if ([manager isAutoFocusEnabled]) {
    [manager enableCameraAutoFocus:YES];
}
[manager enableCameraTorch:YES];


self.trtcCloud = [TRTCCloud sharedInstance];
// Set the preview mode of the local video image: Enable horizontal mirroring and set the fill mode for the video image
TRTCRenderParams *param = [[TRTCRenderParams alloc] init];
param.fillMode   = TRTCVideoFillMode_Fill;
param.mirrorType = TRTCVideoMirrorTypeAuto;
[self.trtcCloud setLocalRenderParams:param];

// Enable local camera preview (`localCameraVideoView` is the control used to render the local video image)
[self.trtcCloud startLocalPreview:localCameraVideoView];


// Set the preview mode of the local video image: Enable horizontal mirroring and set the fill mode for the video image
liteav::TRTCRenderParams render_params;
render_params.mirrorType = liteav::TRTCVideoMirrorType_Enable;
render_params.fillMode = TRTCVideoFillMode_Fill;
trtc_cloud_->setLocalRenderParams(render_params);

// Enable local camera preview (`view` is the control handle used to render the local video image)
liteav::TXView local_view = (liteav::TXView)(view);
trtc_cloud_->startLocalPreview(local_view);


self.trtcCloud = [TRTCCloud sharedInstance];
// Enable mic capture and set `quality` to `SPEECH` (it has a high noise suppression and strong immunity to poor network conditions)
[self.trtcCloud startLocalAudio:TRTCAudioQualitySpeech];

// Enable mic capture and set `quality` to `MUSIC` (it captures high fidelity audio with minimum audio quality loss, and is recommended to be used with a professional sound card)
[self.trtcCloud startLocalAudio:TRTCAudioQualityMusic];


// Enable mic capture and set `quality` to `SPEECH` (it has a high noise suppression and strong immunity to poor network conditions)
trtc_cloud_->startLocalAudio(TRTCAudioQualitySpeech);

// Enable mic capture and set `quality` to `MUSIC` (it captures high fidelity audio with minimum audio quality loss, and is recommended to be used with a professional sound card)
trtc_cloud_->startLocalAudio(TRTCAudioQualityMusic);


self.trtcCloud = [TRTCCloud sharedInstance];
self.trtcCloud.delegate = self;

// Assemble TRTC room entry parameters. Replace the field values in `TRTCParams` with your own parameter values
// Replace each field in TRTCParams with your own parameters
TRTCParams *params = [[TRTCParams alloc] init];
params.sdkAppId = 1400000123;  // Replace with your own SDKAppID
params.roomId = 123321; // Replace with your own room number
params.userId = @"denny";   // Replace with your own userid  
params.userSig = @"xxx"; // Replace with your own userSig
params.role = TRTCRoleAnchor;

// If your scenario is live streaming, set the application scenario to `TRTC_APP_SCENE_LIVE`
// If your application scenario is a group video call, use "TRTC_APP_SCENE_LIVE"
[self.trtcCloud enterRoom:params appScene:TRTCAppSceneLIVE];


trtc_cloud_ = getTRTCShareInstance();

// Assemble TRTC room entry parameters. Replace the field values in `TRTCParams` with your own parameter values
// Replace each field in TRTCParams with your own parameters
liteav::TRTCParams params;
params.sdkAppId = 1400000123;  // Replace with your own SDKAppID
params.userId = "denny";       // Replace with your own user ID  
params.roomId = 123321;        // Replace with your own room number
params.userSig = "xxx";        // Replace with your own userSig
params.role = TRTCCloudDef.TRTCRoleAnchor;

// If your scenario is live streaming, set the application scenario to `TRTC_APP_SCENE_LIVE`
// If your application scenario is a group video call, use "TRTC_APP_SCENE_LIVE"
trtc_cloud_->enterRoom(params, liteav::TRTCAppSceneLIVE);


self.trtcCloud = [TRTCCloud sharedInstance];
// 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
[self.trtcCloud switchRole:TRTCRoleAnchor];
[self.trtcCloud startLocalAudio:TRTCAudioQualityDefault];
[self.trtcCloud startLocalPreview:YES view:localCameraVideoView];

// 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
- (void)onSwitchRole:(TXLiteAVError)errCode errMsg:(nullable NSString *)errMsg {
    if (errCode != 0) {
        NSLog(@"Switching operation failed... ");
    }   
}


self.trtcCloud = [TRTCCloud sharedInstance];
// 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
[self.trtcCloud switchRole:TRTCRoleAnchor];
[self.trtcCloud startLocalAudio:TRTCAudioQualityDefault];
[self.trtcCloud startLocalPreview:localCameraVideoView];

// 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
- (void)onSwitchRole:(TXLiteAVError)errCode errMsg:(nullable NSString *)errMsg {
    if (errCode != 0) {
        NSLog(@"Switching operation failed... ");
    }   
}


// 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
trtc_cloud_->switchRole(liteav::TRTCRoleAnchor);
trtc_cloud_->startLocalAudio(TRTCAudioQualityDefault);
trtc_cloud_->startLocalPreview(hWnd);

// If role switch failed, the error code of the `onSwitchRole` callback is not `ERR_NULL` (i.e., 0)
// If switching operation failed, the error code of the 'onSwitchRole' is not zero
void onSwitchRole(TXLiteAVError errCode, const char* errMsg) {
    if (errCode != ERR_NULL) {
        printf("Switching operation failed...");
    }
}