update

TODO

@@ -16,3 +16,6 @@
 
 # 2022-10-11
 1. 解决视频设备延迟->丢帧机制？或者使用tmpfs->RGB到YUV时，双for循环慢，平均在30-50ms
+
+# 2022-10-18
+1. 视频稳定在15ms左右，但大分辨率仍然慢

drivers/video/ppm.go

@@ -58,19 +58,6 @@ func (v *PPMStreamDriver) Properties() []prop.Media {
 
 func (v *PPMStreamDriver) VideoRecord(p prop.Media) (video.Reader, error) {
 	logrus.Debug(p)
-	/*canvas := image.NewYCbCr(
-		image.Rect(0, 0, p.Width, p.Height),
-		image.YCbCrSubsampleRatio420,
-	)
-
-	Y, Cb, Cr := color.RGBToYCbCr(0, 0, 0)
-	for y := 0; y < canvas.Rect.Dy(); y++ {
-		for x := 0; x < canvas.Rect.Dx(); x++ {
-			canvas.Y[canvas.YOffset(x, y)] = Y
-			canvas.Cb[canvas.COffset(x, y)] = Cb
-			canvas.Cr[canvas.COffset(x, y)] = Cr
-		}
-	}*/
 
 	canvas := image.NewRGBA(image.Rect(0, 0, p.Width, p.Height))
 	var (
@@ -107,7 +94,6 @@ func (v *PPMStreamDriver) VideoRecord(p prop.Media) (video.Reader, error) {
 			draw.Draw(canvas, image.Rect(
 				offsetX, offsetY, offsetX+img.Bounds().Dx(), offsetY+img.Bounds().Dy(),
 			), img, img.Bounds().Min, draw.Over)
-		case <-time.After(time.Second / time.Duration(p.FrameRate)):
 		default:
 		}
 		return canvas, func() {}, nil