视频直播

视频直播需要先创建 ThingSmartCameraType 对象，然后进行 P2P（Peer-to-peer）通道连接。P2P 连接成功后，就可以播放实时视频、查看截图、录制视频、实时对讲数据传输。

流程说明

核心接口

重点关注

• 在使用多线程时，注意 ThingSmartCameraType 对象管理，避免跨线程频繁调用 ThingSmartCameraType 中的实例方法，否则会出现死锁等异常情况。
• 回放切换至直播，请确保停止回放成功。同理，直播切换至回放，请确保停止直播成功。

核心代码

创建 ThingSmartCameraType 对象

+ (id<ThingSmartCameraType>)cameraWithP2PType:(id)type deviceId:(NSString *)devId delegate:(id<ThingSmartCameraDelegate>)delegate;

- (void)cameraInitFailed:(ThingSmartCameraErrorCode)errorCode;

连接

- (void)connectWithMode:(ThingSmartCameraConnectMode)mode;

- (void)cameraDidConnected:(id<ThingSmartCameraType>)camera;

开始直播

//开始直播
- (void)startPreviewWithDefinition:(ThingSmartCameraDefinition)definition;
//开始直播成功
- (void)cameraDidBeginPreview:(id<ThingSmartCameraType>)camera;

停止直播

//停止直播
- (void)stopPreview;
//停止直播成功
- (void)cameraDidStopPreview:(id<ThingSmartCameraType>)camera;

断连

//主动断开连接
- (void)disConnect;
//被动断开连接
- (void)cameraDisconnected:(id<ThingSmartCameraType>)camera specificErrorCode:(NSInteger)errorCode;

示例代码

//1.创建 ThingSmartCameraType 对象
- (void)cameraInit {
    //初始化设备
    self.device = [ThingSmartDevice deviceWithDeviceId:devId];

    // delegate: ThingSmartCameraDelegate 用于监听 P2P 通道连接状态
    self.camera = [ThingSmartCameraFactory     cameraWithP2PType:@(self.device.deviceModel.p2pType)     deviceId:self.device.deviceModel.devId delegate:self];

    //初始化视频预览页面
    self.videoView = self.camera.videoView;

    //将视频渲染视图添加到屏幕上
   [self.view addSubview:self.videoView];
}

//2.连接
- (void)cameraConnect {
    [self.camera connectWithMode:ThingSmartCameraConnectAuto];
}
//连接成功
- (void)cameraDidConnected:(id<ThingSmartCameraType>)camera {
    self.connected = YES;
    [self startPreview];
}
//连接失败
- (void)cameraDisconnected:(id<ThingSmartCameraType>)camera specificErrorCode:(NSInteger)errorCode {
    // P2P 连接被动断开，一般为网络波动导致
    self.connected = NO;
}

//3.开始直播
- (void)startPreview {
    [self.camera startPreviewWithDefinition:];
}
//开始直播成功回调
- (void)cameraDidBeginPreview:(id<ThingSmartCameraType>)camera {
   self.previewing = YES;
}

//4.停止直播
- (void)stopPreview {
    [self.camera stopPreview];
}
//停止直播成功回调
- (void)cameraDidStopPreview:(id<ThingSmartCameraType>)camera {
    self.previewing = NO;
}

//5.断开连接
- (void)disconnect {
    [self.camera disConnect];
}

#pragma mark - ThingSmartCameraDelegate

- (void)camera:(id<ThingSmartCameraType>)camera thing_didReceiveVideoFrame:(CMSampleBufferRef)sampleBuffer frameInfo:(ThingSmartVideoFrameInfo)frameInfo {

}

// 错误回调
- (void)camera:(id<ThingSmartCameraType>)camera didOccurredErrorAtStep:(ThingCameraErrorCode)errStepCode specificErrorCode:(NSInteger)errorCode extErrorCodeInfo:(id<ThingSmartCameraExtErrorCodeInfo>)extErrorCodeInfo {
    if (errStepCode == Thing_ERROR_CONNECT_FAILED) {
         // P2P 连接失败
        self.connected = NO;
    }
    else if (errStepCode == Thing_ERROR_START_PREVIEW_FAILED) {
        // 开始直播失败
        self.previewing = NO;
    }
}