Add support for native VFW implementation on Windows

camera/camera.go

@@ -1,96 +0,0 @@
-// +build !cv3,!native
-
-// Package camera.
-package camera
-
-import (
-	"fmt"
-	"image"
-
-	"github.com/disintegration/imaging"
-	"github.com/lazywei/go-opencv/opencv"
-)
-
-// Options.
-type Options struct {
-	Index  int
-	Rotate int
-	Width  float64
-	Height float64
-}
-
-// Camera represents camera.
-type Camera struct {
-	opts   Options
-	camera *opencv.Capture
-	frame  *opencv.IplImage
-}
-
-// New returns new Camera for given camera index.
-func New(opts Options) (camera *Camera, err error) {
-	camera = &Camera{}
-	camera.opts = opts
-
-	camera.camera = opencv.NewCameraCapture(opts.Index)
-	if camera.camera == nil {
-		err = fmt.Errorf("camera: can not open camera %d", opts.Index)
-	}
-
-	camera.SetProperty(PropFrameWidth, opts.Width)
-	camera.SetProperty(PropFrameHeight, opts.Height)
-
-	return
-}
-
-// Read reads next frame from camera and returns image.
-func (c *Camera) Read() (img image.Image, err error) {
-	if c.camera.GrabFrame() {
-		c.frame = c.camera.RetrieveFrame(1)
-
-		if c.frame == nil {
-			err = fmt.Errorf("camera: can not retrieve frame")
-			return
-		}
-
-		img = c.frame.ToImage()
-		if c.opts.Rotate == 0 {
-			return
-		}
-
-		switch c.opts.Rotate {
-		case 90:
-			img = imaging.Rotate90(img)
-		case 180:
-			img = imaging.Rotate180(img)
-		case 270:
-			img = imaging.Rotate270(img)
-		}
-	} else {
-		err = fmt.Errorf("camera: can not grab frame")
-	}
-
-	return
-}
-
-// GetProperty returns the specified camera property.
-func (c *Camera) GetProperty(id int) float64 {
-	return c.camera.GetProperty(id)
-}
-
-// SetProperty sets a camera property.
-func (c *Camera) SetProperty(id int, value float64) {
-	c.camera.SetProperty(id, value)
-}
-
-// Close closes camera.
-func (c *Camera) Close() (err error) {
-	if c.camera == nil {
-		err = fmt.Errorf("camera: camera is not opened")
-		return
-	}
-
-	c.frame.Release()
-	c.camera.Release()
-	c.camera = nil
-	return
-}