public override void Start()
{
//清空上次的显示内容
Image1 = null;
Image2 = null;
Image3 = null;
Image4 = null;
if (!string.IsNullOrEmpty(Url2))
{
videoPlayHelper1 = new VideoPlayHelper(Url2, (x) => { Image2 = x; });
}
remote_ip = ConfigurationManager.AppSettings["TcpServerIp"];
tcpClient = new TcpClient(remote_ip, remote_port);
Console.WriteLine($"tcp connect: ({remote_ip}, {remote_port})");
stream = tcpClient.GetStream();
//发送角色数据包
Role role = new Role(3, 1, 1);
byte[] send_bytes = StructToBytesHelper.StructToBytes <Role>(role);
stream.WriteAsync(send_bytes, 0, send_bytes.Length);
Console.WriteLine("send_role_packet");
//发送获取图像请求命令包
VideoCmd videoCmd = new VideoCmd(1, 5, RoomId, 1);
byte[] videoCmd_bytes = StructToBytesHelper.StructToBytes <VideoCmd>(videoCmd);
stream.WriteAsync(videoCmd_bytes, 0, videoCmd_bytes.Length);
Console.WriteLine("send_get_video_packet");
//接收图像数据并显示
cancellationTokenSource = new CancellationTokenSource();
Task recvVideoTask = new Task(async() =>
{
try
{
await RecvVideo(cancellationTokenSource.Token);
}
catch (OperationCanceledException)
{
}
stream?.Close();
tcpClient?.Close();
}, cancellationTokenSource.Token);
recvVideoTask.Start();
videoPlayHelper1?.Start();
}
private async Task RecvVideo(CancellationToken token)
{
while (true)
{
token.ThrowIfCancellationRequested();
byte[] video_header_bytes = await tcp_recv(stream, 9);
VideoHeader videoHeader = StructToBytesHelper.BytesToStruct <VideoHeader>(video_header_bytes);
if (videoHeader.type == 2)
{
byte[] video_image_bytes = await tcp_recv(stream, (int)(videoHeader.len) - 4);
Console.WriteLine("recv: " + video_image_bytes.Length);
BitmapImage bitmap = null;
try
{
bitmap = new BitmapImage();
bitmap.BeginInit();
bitmap.StreamSource = new MemoryStream(video_image_bytes);
bitmap.EndInit();
bitmap.Freeze();
if (Url1 != null && videoHeader.cameraId == uint.Parse(Url1))
{
Image1 = bitmap;
}
else if (Url2 != null && videoHeader.cameraId == uint.Parse(Url2))
{
Image2 = bitmap;
}
else if (Url3 != null && videoHeader.cameraId == uint.Parse(Url3))
{
Image3 = bitmap;
}
else if (Url4 != null && videoHeader.cameraId == uint.Parse(Url4))
{
Image4 = bitmap;
}
else
{
}
}
catch (System.NotSupportedException)
{
Console.WriteLine("bitmap not support");
}
}
}
}
public override void Stop()
{
//发送关闭图像命令
//VideoCmd videoCmd = new VideoCmd(1, 5, RoomId, 0);
//byte[] videoCmd_bytes = StructToBytesHelper.StructToBytes<VideoCmd>(videoCmd);
//stream.Write(videoCmd_bytes, 0, videoCmd_bytes.Length);
//发送关闭连接命令
Role exit_role = new Role(4, 1, 1);
byte[] exit_bytes = StructToBytesHelper.StructToBytes <Role>(exit_role);
stream.Write(exit_bytes, 0, exit_bytes.Length);
cancellationTokenSource.Cancel();
}
