cmd/revid-cli & revid: added back vertical and horizontal flip options

cmd/revid-cli/main.go

@@ -119,6 +119,8 @@ func handleFlags() revid.Config {
 		httpAddressPtr        = flag.String("HttpAddress", "", "Destination address of http posts")
 		quantizePtr           = flag.Bool("Quantize", false, "Quantize input (non-variable bitrate)")
 		sendRetryPtr          = flag.Bool("retry", false, "Specify whether a failed send should be retried.")
+		verticalFlipPtr       = flag.Bool("VerticalFlip", false, "Flip video vertically: Yes, No")
+		horizontalFlipPtr     = flag.Bool("HorizontalFlip", false, "Flip video horizontally: Yes, No")
 		framesPerClipPtr      = flag.Uint("FramesPerClip", 0, "Number of frames per clip sent")
 		bitratePtr            = flag.Uint("Bitrate", 0, "Bitrate of recorded video")
 		heightPtr             = flag.Uint("Height", 0, "Height in pixels")
@@ -239,6 +241,8 @@ func handleFlags() revid.Config {
 
 	cfg.Quantize = *quantizePtr
 	cfg.Rotation = *rotationPtr
+	cfg.FlipHorizontal = *horizontalFlipPtr
+	cfg.FlipVertical = *verticalFlipPtr
 	cfg.FramesPerClip = *framesPerClipPtr
 	cfg.RtmpUrl = *rtmpUrlPtr
 	cfg.Bitrate = *bitratePtr

revid/config.go

@@ -49,6 +49,11 @@ type Config struct {
 	// bitrate.
 	Quantize bool
 
+	// FlipHorizonatla and FlipVertical specify
+	// whether video frames should be flipped.
+	FlipHorizontal bool
+	FlipVertical   bool
+
 	FramesPerClip      uint
 	RtmpUrl            string
 	Bitrate            uint

revid/revid.go

@@ -480,6 +480,25 @@ func (r *Revid) Update(vars map[string]string) error {
 				break
 			}
 			r.config.IntraRefreshPeriod = uint(p)
+
+		case "HorizontalFlip":
+			switch strings.ToLower(value) {
+			case "true":
+				r.config.FlipHorizontal = true
+			case "false":
+				r.config.FlipHorizontal = false
+			default:
+				r.config.Logger.Log(logger.Warning, pkg+"invalid HorizontalFlip param", "value", value)
+			}
+		case "VerticalFlip":
+			switch strings.ToLower(value) {
+			case "true":
+				r.config.FlipVertical = true
+			case "false":
+				r.config.FlipVertical = false
+			default:
+				r.config.Logger.Log(logger.Warning, pkg+"invalid VerticalFlip param", "value", value)
+			}
 		case "BurstPeriod":
 			v, err := strconv.ParseUint(value, 10, 0)
 			if err != nil {
@@ -601,6 +620,15 @@ func (r *Revid) startRaspivid() error {
 		"--rotation", fmt.Sprint(r.config.Rotation),
 	}
 
+	switch {
+	case r.config.FlipHorizontal && r.config.FlipVertical:
+		args = append(args, "-vf", "hflip,vflip")
+	case r.config.FlipHorizontal:
+		args = append(args, "-vf", "hflip")
+	case r.config.FlipVertical:
+		args = append(args, "-vf", "vflip")
+	}
+
 	switch r.config.InputCodec {
 	default:
 		return fmt.Errorf("revid: invalid input codec: %v", r.config.InputCodec)