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face_detector.go
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/
face_detector.go
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package face_detector_driver
import (
"sync"
"time"
)
type Event interface {
Type() string
Timestamp() time.Time
}
type FaceDetected interface {
Event
Face() []byte
Snapshot() []byte
}
func ToFaceDetectedE(evt Event) (FaceDetected, error) {
fde, ok := evt.(FaceDetected)
if !ok {
return nil, ErrUnexpectedEvent
}
return fde, nil
}
func ToFaceDetected(evt Event) FaceDetected {
fde, _ := ToFaceDetectedE(evt)
return fde
}
type FaceDetector interface {
Detect() <-chan Event
Close()
}
type FaceDetectorFactory func(...interface{}) (FaceDetector, error)
var face_detector_factories map[string]FaceDetectorFactory
var face_detector_factories_once sync.Once
func register_face_detector_factory(name string, fty FaceDetectorFactory) {
face_detector_factories_once.Do(func() {
face_detector_factories = make(map[string]FaceDetectorFactory)
})
face_detector_factories[name] = fty
}
func NewFaceDetector(name string, args ...interface{}) (FaceDetector, error) {
fty, ok := face_detector_factories[name]
if !ok {
return nil, ErrUnsupportedFaceDetectorDriver
}
return fty(args...)
}