好多开发者的使用场景,需要在Windows特别是Android平台实现Unity3D的全景实时视频渲染,本文以Windows平台为例,简单介绍下具体实现:
如果是RTSP或RTMP流数据,实际上难点,主要在于拉取RTSP或RTMP流,解析解码,然后把解码后的YUV数据,回调到Unity层,Unity创建个Sphere,创建个材质球(Material),并把材质球挂在到Sphere即可。
本文以Windows推送端采集全景视频,编码推送到RTMP服务器,播放端拉流回调数据并在Unity渲染为例(左侧是Unity播放端,滑动鼠标,可以实现全景内容切换):
废话不多说,大概流程如下:
本文以调用我们写的RTSP、RTMP直播播放模块为例,首先是初始化模块,然后设置拉流的参数信息:
public void Play(int sel)
{if (videoctrl[sel].is_running){Debug.Log("已经在播放..");return;}lock (videoctrl[sel].frame_lock_){videoctrl[sel].cur_video_frame_ = null;}OpenPlayer(sel);if (videoctrl[sel].player_handle_ == IntPtr.Zero)return;//设置播放URLNTSmartPlayerSDK.NT_SP_SetURL(videoctrl[sel].player_handle_, videoctrl[sel].videoUrl);/* ++ 播放前参数配置可加在此处 ++ */int play_buffer_time_ = 0;NTSmartPlayerSDK.NT_SP_SetBuffer(videoctrl[sel].player_handle_, play_buffer_time_); //设置buffer timeint is_using_tcp = 0; //TCP模式NTSmartPlayerSDK.NT_SP_SetRTSPTcpMode(videoctrl[sel].player_handle_, is_using_tcp);int timeout = 10;NTSmartPlayerSDK.NT_SP_SetRtspTimeout(videoctrl[sel].player_handle_, timeout);int is_auto_switch_tcp_udp = 1;NTSmartPlayerSDK.NT_SP_SetRtspAutoSwitchTcpUdp(videoctrl[sel].player_handle_, is_auto_switch_tcp_udp);Boolean is_mute_ = false;NTSmartPlayerSDK.NT_SP_SetMute(videoctrl[sel].player_handle_, is_mute_ ? 1 : 0); //是否启动播放的时候静音int is_fast_startup = 1;NTSmartPlayerSDK.NT_SP_SetFastStartup(videoctrl[sel].player_handle_, is_fast_startup); //设置快速启动模式Boolean is_low_latency_ = false;NTSmartPlayerSDK.NT_SP_SetLowLatencyMode(videoctrl[sel].player_handle_, is_low_latency_ ? 1 : 0); //设置是否启用低延迟模式//设置旋转角度(设置0, 90, 180, 270度有效,其他值无效)int rotate_degrees = 0;NTSmartPlayerSDK.NT_SP_SetRotation(videoctrl[sel].player_handle_, rotate_degrees);int volume = 100;
NTSmartPlayerSDK.NT_SP_SetAudioVolume(videoctrl[sel].player_handle_, volume); //设置播放音量, 范围是[0, 100], 0是静音,100是最大音量, 默认是100// 设置上传下载报速度int is_report = 0;int report_interval = 1;NTSmartPlayerSDK.NT_SP_SetReportDownloadSpeed(videoctrl[sel].player_handle_, is_report, report_interval);/* -- 播放前参数配置可加在此处 -- *///video frame callback (YUV/RGB)videoctrl[sel].video_frame_call_back_ = new SP_SDKVideoFrameCallBack(NT_SP_SetVideoFrameCallBack);NTSmartPlayerSDK.NT_SP_SetVideoFrameCallBack(videoctrl[sel].player_handle_, (Int32)NT.NTSmartPlayerDefine.NT_SP_E_VIDEO_FRAME_FORMAT.NT_SP_E_VIDEO_FRAME_FROMAT_I420, window_handle_, videoctrl[sel].video_frame_call_back_);UInt32 flag = NTSmartPlayerSDK.NT_SP_StartPlay(videoctrl[sel].player_handle_);if (flag == DANIULIVE_RETURN_OK){videoctrl[sel].is_need_get_frame_ = true;Debug.Log("播放成功");}else{videoctrl[sel].is_need_get_frame_ = false;Debug.LogError("播放失败");}videoctrl[sel].is_running = true;
}
具体OpenPlayer()实现:
private void OpenPlayer(int sel)
{window_handle_ = IntPtr.Zero;if (videoctrl[sel].player_handle_ == IntPtr.Zero){videoctrl[sel].player_handle_ = new IntPtr();UInt32 ret_open = NTSmartPlayerSDK.NT_SP_Open(out videoctrl[sel].player_handle_, window_handle_, 0, IntPtr.Zero);if (ret_open != 0){videoctrl[sel].player_handle_ = IntPtr.Zero;Debug.LogError("调用NT_SP_Open失败..");return;}}videoctrl[sel].event_call_back_ = new SP_SDKEventCallBack(NT_SP_SDKEventCallBack);NTSmartPlayerSDK.NT_SP_SetEventCallBack(videoctrl[sel].player_handle_, window_handle_, videoctrl[sel].event_call_back_);videoctrl[sel].sdk_video_frame_call_back_ = new VideoControl.SetVideoFrameCallBack(SDKVideoFrameCallBack);videoctrl[sel].sdk_event_call_back_ = new VideoControl.SetEventCallBack(SDKEventCallBack);
}
数据回调到Unity层:
private void SDKVideoFrameCallBack(UInt32 status, IntPtr frame, int sel)
{//这里拿到回调frame,进行相关操作NT_SP_VideoFrame video_frame = (NT_SP_VideoFrame)Marshal.PtrToStructure(frame, typeof(NT_SP_VideoFrame));VideoFrame u3d_frame = new VideoFrame();u3d_frame.width_ = video_frame.width_;u3d_frame.height_ = video_frame.height_;u3d_frame.timestamp_ = (UInt64)video_frame.timestamp_;int d_y_stride = video_frame.width_;int d_u_stride = (video_frame.width_ + 1) / 2;int d_v_stride = d_u_stride;int d_y_size = d_y_stride * video_frame.height_;int d_u_size = d_u_stride * ((video_frame.height_ + 1) / 2);int d_v_size = d_u_size;int u_v_height = ((u3d_frame.height_ + 1) / 2);u3d_frame.y_stride_ = d_y_stride;u3d_frame.u_stride_ = d_u_stride;u3d_frame.v_stride_ = d_v_stride;u3d_frame.y_data_ = new byte[d_y_size];u3d_frame.u_data_ = new byte[d_u_size];u3d_frame.v_data_ = new byte[d_v_size];CopyFramePlane(u3d_frame.y_data_, d_y_stride,video_frame.plane0_, video_frame.stride0_, u3d_frame.height_);CopyFramePlane(u3d_frame.u_data_, d_u_stride,video_frame.plane1_, video_frame.stride1_, u_v_height);CopyFramePlane(u3d_frame.v_data_, d_v_stride,video_frame.plane2_, video_frame.stride2_, u_v_height);lock (videoctrl[sel].frame_lock_ ){videoctrl[sel].cur_video_frame_ = u3d_frame;//Debug.LogError("sel: " + sel + " w:" + u3d_frame.width_ + "h:" + u3d_frame.height_);}
}
Unity刷新Texture:
private void UpdateYUVTexture(VideoFrame video_frame, int sel)
{if (video_frame.y_data_ == null || video_frame.u_data_ == null || video_frame.v_data_ == null){Debug.Log("video frame with null..");return;}if (videoctrl[sel].yTexture_ != null){videoctrl[sel].yTexture_.LoadRawTextureData(video_frame.y_data_);videoctrl[sel].yTexture_.Apply();}if (videoctrl[sel].uTexture_ != null){videoctrl[sel].uTexture_.LoadRawTextureData(video_frame.u_data_);videoctrl[sel].uTexture_.Apply();}if (videoctrl[sel].vTexture_ != null){videoctrl[sel].vTexture_.LoadRawTextureData(video_frame.v_data_);videoctrl[sel].vTexture_.Apply();}
}
全景播放,还需要考虑到鼠标或屏幕滑动,这块实现比较多,放个通用的代码参考:
void Update () {if (Input.GetMouseButton(0)){if (PreMouseLPos.x <= 0){PreMouseLPos = new Vector3(Input.mousePosition.x, Input.mousePosition.y, 0.0f);}else{Vector3 CurMouseLPos = new Vector3(Input.mousePosition.x, Input.mousePosition.y, 0.0f);Vector3 offset = CurMouseLPos - PreMouseLPos;Quaternion tt = Quaternion.Euler(offset);float rotationX = transform.localEulerAngles.y - tt.x * 20;rotationY += tt.y * 20;rotationY = Mathf.Clamp(rotationY, minimumY, maximumY);transform.localEulerAngles = new Vector3(rotationY, rotationX, 0);PreMouseLPos = CurMouseLPos;}}else{PreMouseLPos = new Vector3(0.0f, 0.0f, 0.0f);}
}
感兴趣的开发者,可尝试看看。