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Reuse frame

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This commit is contained in:
Milan Nikolic
2018-03-14 14:33:01 +01:00
parent 3c0c949f31
commit e1f03b55a1
4 changed files with 22 additions and 14 deletions
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12
camera/camera_cv3.go
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@@ -13,12 +13,16 @@ import (
// Camera represents camera.
type Camera struct {
camera *gocv.VideoCapture
frame *gocv.Mat
}
// New returns new Camera for given camera index.
func New(index int) (camera *Camera, err error) {
camera = &Camera{}
mat := gocv.NewMat()
camera.frame = &mat
camera.camera, err = gocv.VideoCaptureDevice(index)
if err != nil {
err = fmt.Errorf("camera: can not open camera %d: %s", index, err.Error())
@@ -29,16 +33,13 @@ func New(index int) (camera *Camera, err error) {
// Read reads next frame from camera and returns image.
func (c *Camera) Read() (img image.Image, err error) {
mat := gocv.NewMat()
defer mat.Close()
ok := c.camera.Read(mat)
ok := c.camera.Read(*c.frame)
if !ok {
err = fmt.Errorf("camera: can not grab frame")
return
}
img, e := mat.ToImage()
img, e := c.frame.ToImage()
if e != nil {
err = fmt.Errorf("camera: %v", e)
return
@@ -64,6 +65,7 @@ func (c *Camera) Close() (err error) {
return
}
c.frame.Close()
err = c.camera.Close()
c.camera = nil
return