using UnityEngine;
using System.Net.Sockets;

public class VideoSender : MonoBehaviour
{
    [Header("摄像机设置")]
    public Camera captureCamera;
    public int targetWidth = 640;
    public int targetHeight = 360;

    [Header("网络设置")]
    public string remoteIP = "192.168.0.78"; // 接收端 IP根据自己需要配置
    public int remotePort = 8888;// 接收端端口根据自己需要配置

    [Header("发送帧率")]
    public int fps = 15;

    private RenderTexture renderTexture;
    private Texture2D readTexture;
    private UdpClient udpClient;
    private float timer;

    void Start()
    {
        if (captureCamera == null)
        {
            Debug.LogError("❌ 请在 Inspector 中指定 captureCamera！");
            enabled = false;
            return;
        }

        renderTexture = new RenderTexture(targetWidth, targetHeight, 16);
        readTexture = new Texture2D(targetWidth, targetHeight, TextureFormat.RGB24, false);
        udpClient = new UdpClient();
        timer = 0;
    }

    void Update()
    {
        timer += Time.deltaTime;
        if (timer >= 1f / fps)
        {
            timer = 0;
            SendFrame();
        }
    }

    void SendFrame()
    {
        if (captureCamera == null || !captureCamera.enabled || !captureCamera.gameObject.activeInHierarchy)
        {
            Debug.LogWarning("⚠️ 摄像机未启用或未激活，跳过本帧！");
            return;
        }

        // 设置渲染目标并渲染
        captureCamera.targetTexture = renderTexture;
        RenderTexture.active = renderTexture;
        captureCamera.Render();

        // 从渲染结果中读取图像
        readTexture.ReadPixels(new Rect(0, 0, targetWidth, targetHeight), 0, 0);
        readTexture.Apply();
        RenderTexture.active = null;
        captureCamera.targetTexture = null;

        // 编码为 JPEG
        byte[] jpgBytes = readTexture.EncodeToJPG(40); // 压缩率 0~100

        // UDP 发送（不超过 65KB）
        if (jpgBytes.Length < 65000)
        {
            udpClient.Send(jpgBytes, jpgBytes.Length, remoteIP, remotePort);
        }
        else
        {
            Debug.LogWarning("⚠️ 图片数据太大，需分包或切换 TCP！");
        }
    }

    void OnApplicationQuit()
    {
        udpClient.Close();
    }
}
unity中创建空物体吧脚本VideoSender添加在空物体上，