iOS平台RTMP|RTSP播放器如何实时回调YUV数据

-(bool)StartPlayer
{
    NSLog(@"[daniusdk]StartPlayer++");
    
    if ( _smart_player_sdk == nil )
    {
        NSLog(@"StartPlayer, player SDK with nil");
        return false;
    }
    //设置视频画面的填充模式，如填充整个view、等比例填充view
    NSInteger render_scale_mode = 1;
    [_smart_player_sdk SmartPlayerSetRenderScaleMode:render_scale_mode];
    
    //设置视频view旋转角度
    [_smart_player_sdk SmartPlayerSetRotation:rotate_degrees_];
    
    float f = audioVolumeSlider.value; //读取滑块的值
    [_smart_player_sdk SmartPlayerSetAudioVolume:(NSInteger)f];
    
    //软/硬解码模式设置
    [_smart_player_sdk SmartPlayerSetVideoDecoderMode:is_hardware_decoder_];
    
    if (is_audio_only_) {
        [_smart_player_sdk SmartPlayerSetPlayView:nil];
    }
    else
    {
        //如果只需外部回调YUV数据，自己绘制，无需创建view和设置view到SDK
        _glView = (__bridge UIView *)([SmartPlayerSDK SmartPlayerCreatePlayView:0 y:50 width:player_view_width_ height:player_view_height_]);
        
        if (_glView == nil ) {
            NSLog(@"CreatePlayView failed..");
            return false;
        }
        
        [self.view addSubview:_glView];
        
        [_smart_player_sdk SmartPlayerSetPlayView:(__bridge void *)(_glView)];
    }
    
     _smart_player_sdk.yuvDataBlock = ^void(int width, int height, unsigned long long time_stamp,
     unsigned char*yData, unsigned char* uData, unsigned char*vData,
     int yStride, int uStride, int vStride)
     {
     NSLog(@"[PlaySideYuvCallback] width:%d, height:%d, ts:%lld, y:%d, u:%d, v:%d", width, height, time_stamp, yStride, uStride, vStride);
     //这里接收底层回调的YUV数据
     };
    
    //设置YUV数据回调输出
    [_smart_player_sdk SmartPlayerSetYuvBlock:true];
    
    NSInteger ret = [_smart_player_sdk SmartPlayerStart];
    
    if(ret != DANIULIVE_RETURN_OK)
    {
        NSLog(@"Call SmartPlayerStart failed..ret:%ld", (long)ret);
        return false;
    }
    
    NSLog(@"[daniusdk]StartPlayer--");
    return true;
}

_smart_player_sdk.yuvDataBlock = ^void(int width, int height, unsigned long long time_stamp,
     unsigned char*yData, unsigned char* uData, unsigned char*vData,
     int yStride, int uStride, int vStride)
     {
     NSLog(@"[PlaySideYuvCallback] width:%d, height:%d, ts:%lld, y:%d, u:%d, v:%d", width, height, time_stamp, yStride, uStride, vStride);
     //这里接收底层回调的YUV数据
     };
    
    //设置YUV数据回调输出
    [_smart_player_sdk SmartPlayerSetYuvBlock:true];