149 lines
3.4 KiB
Go
149 lines
3.4 KiB
Go
package service
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import (
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"VideoStream/dao"
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"VideoStream/proto"
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"fmt"
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"gocv.io/x/gocv"
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"image"
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"image/color"
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"log"
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"net/http"
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"sync"
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"time"
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)
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var DeviceRWMap = make(map[int]sync.RWMutex)
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var DeviceCurrentFrameMap = make(map[int]gocv.Mat)
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var DeviceFrameCount = make(map[int]int)
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var DeviceIsStop = make(map[int]bool)
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func SetDeviceCurrentFrame(frame gocv.Mat, device_id int) error {
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//获取读写锁
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mutex, ok := DeviceRWMap[device_id]
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if !ok {
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return fmt.Errorf("设备:%s 读写锁不存在", device_id)
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}
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mutex.Lock()
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defer mutex.Unlock()
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//设置当前帧
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DeviceCurrentFrameMap[device_id] = frame
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DeviceFrameCount[device_id]++
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return nil
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}
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func GetDeviceCurrentFrame(device_id int) (gocv.Mat, int) {
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//获取读写锁
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mutex, ok := DeviceRWMap[device_id]
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if !ok {
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return gocv.NewMat(), -1
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}
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mutex.RLock()
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defer mutex.RUnlock()
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//获取当前帧
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return DeviceCurrentFrameMap[device_id], DeviceFrameCount[device_id]
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}
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func getVideoFrame(device proto.DeviceInfo) {
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webcam, err := gocv.OpenVideoCapture(device.Stream)
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if err != nil {
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fmt.Printf("设备:%s 错误: 无法打开视频流，err: %v\n", device.ID, err)
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return
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}
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defer webcam.Close()
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// 字体相关设置，对应OpenCV默认字体等，这里简化处理，实际可按需求调整
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font := gocv.FontHersheySimplex
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fontScale := 0.5
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fontColor := color.RGBA{G: 255}
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lineType := 2
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z := 0
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for {
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if device.LogFrame > 0 && z%device.LogFrame == 0 {
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fmt.Printf("设备:%s 当前帧: %d\n", device.ID, z)
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}
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if device.NextStop {
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break
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}
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frame := gocv.NewMat()
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ok := webcam.Read(&frame)
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if !ok {
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fmt.Printf("设备:%s 错误: 无法从视频流中读取帧\n", device)
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break
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}
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if frame.Empty() {
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fmt.Printf("设备:%s 错误: 无法从视频流中读取帧\n", device)
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//等待50ms
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time.Sleep(50 * time.Millisecond)
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continue
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}
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height := frame.Rows()
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width := frame.Cols()
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if height < device.CheckFrameHeight || width < device.CheckFrameWidth {
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fmt.Printf("设备:%s 帧尺寸已改变\n", device)
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break
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}
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currentTime := time.Now().Format("2006-01-02 15:04:05")
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gocv.PutText(&frame, currentTime, image.Point{10, 20}, font, fontScale, fontColor, lineType)
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//需要将帧付给全局变量
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err := SetDeviceCurrentFrame(frame, device.ID)
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if err != nil {
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fmt.Printf("设备:%s 错误: 无法设置当前帧\n", device)
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}
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z++
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}
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}
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// 发起get请求,返回响应状态码
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func Get(url string) int {
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req, err := http.NewRequest("GET", url, nil)
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var client = &http.Client{}
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if err != nil {
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return 500
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}
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resp, err := client.Do(req)
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if err != nil {
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return 500
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}
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return resp.StatusCode
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}
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func GetVideoStream(id int) {
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for {
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var device proto.DeviceInfo
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var index int
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//获取设备信息
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for i, device1 := range proto.Config.DeviceInfo {
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if device1.ID == id {
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device = device1
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break
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}
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index = i
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}
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if index == len(proto.Config.DeviceInfo) {
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//设备不存在
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log.Println("device:", id, " not found")
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break
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}
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if device.NextStop {
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DeviceIsStop[id] = true
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break
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}
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//设置设备控制信息
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status := Get(device.Control)
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DeviceIsStop[id] = false
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log.Println("device:", device.ID, " set control info status:", status)
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getVideoFrame(device)
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}
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}
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func DoGetVideoStream() {
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for _, device := range proto.Config.DeviceInfo {
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go GetVideoStream(device.ID)
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}
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}
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func GetDevice(id, auth_id int) dao.Device {
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return dao.FindDeviceByID(id, auth_id)
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}
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