cameras.c: disable depth and IR camera hflip by default

OpenNI sometimes enables the depth camera horizontal flip and leaves the device in that state on close, so then anything using libfreenect gets an hflipped image. This is subpar. The same thing can happen to the IR camera, so I disabled it too. Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Author: zarvox

src/cameras.c

@@ -687,6 +687,7 @@ int freenect_start_depth(freenect_device *dev)
 write_register(dev, 0x13, 0x01);
 write_register(dev, 0x14, 0x1e);
 write_register(dev, 0x06, 0x02); // start depth stream
+write_register(dev, 0x17, 0x00); // disable depth hflip
 
 dev->depth.running = 1;
 return 0;
@@ -707,6 +708,7 @@ int freenect_start_video(freenect_device *dev)
 uint16_t mode_reg, mode_value;
 uint16_t res_reg, res_value;
 uint16_t fps_reg, fps_value;
+uint16_t hflip_reg;
 
 switch(dev->video_format) {
 case FREENECT_VIDEO_RGB:
@@ -726,6 +728,7 @@ int freenect_start_video(freenect_device *dev)
 mode_reg = 0x0c;
 res_reg = 0x0d;
 fps_reg = 0x0e;
+hflip_reg = 0x47;
 break;
 case FREENECT_VIDEO_IR_8BIT:
 case FREENECT_VIDEO_IR_10BIT:
@@ -758,6 +761,7 @@ int freenect_start_video(freenect_device *dev)
 mode_reg = 0x19;
 res_reg = 0x1a;
 fps_reg = 0x1b;
+hflip_reg = 0x48;
 break;
 case FREENECT_VIDEO_YUV_RGB:
 case FREENECT_VIDEO_YUV_RAW:
@@ -772,6 +776,7 @@ int freenect_start_video(freenect_device *dev)
 mode_reg = 0x0c;
 res_reg = 0x0d;
 fps_reg = 0x0e;
+hflip_reg = 0x47;
 break;
 default:
 FN_ERROR("freenect_start_video(): called with invalid video format %d\n", dev->video_format);
@@ -825,7 +830,7 @@ int freenect_start_video(freenect_device *dev)
 write_register(dev, 0x05, 0x03); // start video stream
 break;
 }
-write_register(dev, 0x47, 0x00); // disable Hflip
+write_register(dev, hflip_reg, 0x00); // disable Hflip
 
 dev->video.running = 1;
 return 0;