[PATCH v5] videodev2: Set vb2_rect's width and height as unsigned

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As discussed on the media summit 2013, there is no reason for the width
and height to be signed.

Therefore this patch is an attempt to convert those fields from __s32 to
__u32.

Acked-by: Sakari Ailus <sakari.ailus@xxxxxx> (documentation and smiapp)
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@xxxxxxxxx>
---
v5: Comments by Sakari Ailus
-Fix typos in summary

v4: Wrong patch format

v3: Comments by Sakari Ailus
-Update also doc

v2: Comments by Sakari Ailus and Laurent Pinchart

-Fix alignment on all drivers
-Replace min with min_t where possible and remove unneeded checks

 Documentation/DocBook/media/v4l/compat.xml         | 12 ++++++++
 Documentation/DocBook/media/v4l/dev-overlay.xml    |  8 ++---
 Documentation/DocBook/media/v4l/vidioc-cropcap.xml |  8 ++---
 drivers/media/i2c/mt9m032.c                        | 16 +++++-----
 drivers/media/i2c/mt9p031.c                        | 28 ++++++++++--------
 drivers/media/i2c/mt9t001.c                        | 26 ++++++++++-------
 drivers/media/i2c/mt9v032.c                        | 34 ++++++++++++----------
 drivers/media/i2c/smiapp/smiapp-core.c             |  8 ++---
 drivers/media/i2c/soc_camera/mt9m111.c             |  4 +--
 drivers/media/i2c/tvp5150.c                        | 14 ++++-----
 drivers/media/pci/bt8xx/bttv-driver.c              |  6 ++--
 drivers/media/pci/saa7134/saa7134-video.c          |  4 ---
 drivers/media/platform/soc_camera/soc_scale_crop.c |  4 +--
 include/uapi/linux/videodev2.h                     |  4 +--
 14 files changed, 97 insertions(+), 79 deletions(-)

diff --git a/Documentation/DocBook/media/v4l/compat.xml b/Documentation/DocBook/media/v4l/compat.xml
index 0c7195e..5dbe68b 100644
--- a/Documentation/DocBook/media/v4l/compat.xml
+++ b/Documentation/DocBook/media/v4l/compat.xml
@@ -2523,6 +2523,18 @@ that used it. It was originally scheduled for removal in 2.6.35.
       </orderedlist>
     </section>
 
+    <section>
+      <title>V4L2 in Linux 3.12</title>
+      <orderedlist>
+        <listitem>
+		<para> In struct <structname>v4l2_rect</structname>, the type
+of <structfield>width</structfield> and <structfield>height</structfield>
+fields changed from _s32 to _u32.
+	  </para>
+        </listitem>
+      </orderedlist>
+    </section>
+
     <section id="other">
       <title>Relation of V4L2 to other Linux multimedia APIs</title>
 
diff --git a/Documentation/DocBook/media/v4l/dev-overlay.xml b/Documentation/DocBook/media/v4l/dev-overlay.xml
index 40d1d76..a44ac66 100644
--- a/Documentation/DocBook/media/v4l/dev-overlay.xml
+++ b/Documentation/DocBook/media/v4l/dev-overlay.xml
@@ -346,16 +346,14 @@ rectangle, in pixels.</entry>
 rectangle, in pixels. Offsets increase to the right and down.</entry>
 	  </row>
 	  <row>
-	    <entry>__s32</entry>
+	    <entry>__u32</entry>
 	    <entry><structfield>width</structfield></entry>
 	    <entry>Width of the rectangle, in pixels.</entry>
 	  </row>
 	  <row>
-	    <entry>__s32</entry>
+	    <entry>__u32</entry>
 	    <entry><structfield>height</structfield></entry>
-	    <entry>Height of the rectangle, in pixels. Width and
-height cannot be negative, the fields are signed for hysterical
-reasons. <!-- video4linux-list@xxxxxxxxxx on 22 Oct 2002 subject
+	    <entry>Height of the rectangle, in pixels.<!-- video4linux-list@xxxxxxxxxx on 22 Oct 2002 subject
 "Re:[V4L][patches!] Re:v4l2/kernel-2.5" --></entry>
 	  </row>
 	</tbody>
diff --git a/Documentation/DocBook/media/v4l/vidioc-cropcap.xml b/Documentation/DocBook/media/v4l/vidioc-cropcap.xml
index bf7cc97..26b8f8f 100644
--- a/Documentation/DocBook/media/v4l/vidioc-cropcap.xml
+++ b/Documentation/DocBook/media/v4l/vidioc-cropcap.xml
@@ -133,16 +133,14 @@ rectangle, in pixels.</entry>
 rectangle, in pixels.</entry>
 	  </row>
 	  <row>
-	    <entry>__s32</entry>
+	    <entry>__u32</entry>
 	    <entry><structfield>width</structfield></entry>
 	    <entry>Width of the rectangle, in pixels.</entry>
 	  </row>
 	  <row>
-	    <entry>__s32</entry>
+	    <entry>__u32</entry>
 	    <entry><structfield>height</structfield></entry>
-	    <entry>Height of the rectangle, in pixels. Width
-and height cannot be negative, the fields are signed for
-hysterical reasons. <!-- video4linux-list@xxxxxxxxxx
+	    <entry>Height of the rectangle, in pixels.<!-- video4linux-list@xxxxxxxxxx
 on 22 Oct 2002 subject "Re:[V4L][patches!] Re:v4l2/kernel-2.5" -->
 </entry>
 	  </row>
diff --git a/drivers/media/i2c/mt9m032.c b/drivers/media/i2c/mt9m032.c
index 846b15f..85ec3ba 100644
--- a/drivers/media/i2c/mt9m032.c
+++ b/drivers/media/i2c/mt9m032.c
@@ -459,13 +459,15 @@ static int mt9m032_set_pad_crop(struct v4l2_subdev *subdev,
 			  MT9M032_COLUMN_START_MAX);
 	rect.top = clamp(ALIGN(crop->rect.top, 2), MT9M032_ROW_START_MIN,
 			 MT9M032_ROW_START_MAX);
-	rect.width = clamp(ALIGN(crop->rect.width, 2), MT9M032_COLUMN_SIZE_MIN,
-			   MT9M032_COLUMN_SIZE_MAX);
-	rect.height = clamp(ALIGN(crop->rect.height, 2), MT9M032_ROW_SIZE_MIN,
-			    MT9M032_ROW_SIZE_MAX);
-
-	rect.width = min(rect.width, MT9M032_PIXEL_ARRAY_WIDTH - rect.left);
-	rect.height = min(rect.height, MT9M032_PIXEL_ARRAY_HEIGHT - rect.top);
+	rect.width = clamp_t(unsigned int, ALIGN(crop->rect.width, 2),
+			     MT9M032_COLUMN_SIZE_MIN, MT9M032_COLUMN_SIZE_MAX);
+	rect.height = clamp_t(unsigned int, ALIGN(crop->rect.height, 2),
+			      MT9M032_ROW_SIZE_MIN, MT9M032_ROW_SIZE_MAX);
+
+	rect.width = min_t(unsigned int, rect.width,
+			   MT9M032_PIXEL_ARRAY_WIDTH - rect.left);
+	rect.height = min_t(unsigned int, rect.height,
+			    MT9M032_PIXEL_ARRAY_HEIGHT - rect.top);
 
 	__crop = __mt9m032_get_pad_crop(sensor, fh, crop->which);
 
diff --git a/drivers/media/i2c/mt9p031.c b/drivers/media/i2c/mt9p031.c
index 4734836..722f78a 100644
--- a/drivers/media/i2c/mt9p031.c
+++ b/drivers/media/i2c/mt9p031.c
@@ -518,11 +518,13 @@ static int mt9p031_set_format(struct v4l2_subdev *subdev,
 
 	/* Clamp the width and height to avoid dividing by zero. */
 	width = clamp_t(unsigned int, ALIGN(format->format.width, 2),
-			max(__crop->width / 7, MT9P031_WINDOW_WIDTH_MIN),
+			max_t(unsigned int, __crop->width / 7,
+			      MT9P031_WINDOW_WIDTH_MIN),
 			__crop->width);
 	height = clamp_t(unsigned int, ALIGN(format->format.height, 2),
-			max(__crop->height / 8, MT9P031_WINDOW_HEIGHT_MIN),
-			__crop->height);
+			 max_t(unsigned int, __crop->height / 8,
+			       MT9P031_WINDOW_HEIGHT_MIN),
+			 __crop->height);
 
 	hratio = DIV_ROUND_CLOSEST(__crop->width, width);
 	vratio = DIV_ROUND_CLOSEST(__crop->height, height);
@@ -564,15 +566,17 @@ static int mt9p031_set_crop(struct v4l2_subdev *subdev,
 			  MT9P031_COLUMN_START_MAX);
 	rect.top = clamp(ALIGN(crop->rect.top, 2), MT9P031_ROW_START_MIN,
 			 MT9P031_ROW_START_MAX);
-	rect.width = clamp(ALIGN(crop->rect.width, 2),
-			   MT9P031_WINDOW_WIDTH_MIN,
-			   MT9P031_WINDOW_WIDTH_MAX);
-	rect.height = clamp(ALIGN(crop->rect.height, 2),
-			    MT9P031_WINDOW_HEIGHT_MIN,
-			    MT9P031_WINDOW_HEIGHT_MAX);
-
-	rect.width = min(rect.width, MT9P031_PIXEL_ARRAY_WIDTH - rect.left);
-	rect.height = min(rect.height, MT9P031_PIXEL_ARRAY_HEIGHT - rect.top);
+	rect.width = clamp_t(unsigned int, ALIGN(crop->rect.width, 2),
+			     MT9P031_WINDOW_WIDTH_MIN,
+			     MT9P031_WINDOW_WIDTH_MAX);
+	rect.height = clamp_t(unsigned int, ALIGN(crop->rect.height, 2),
+			      MT9P031_WINDOW_HEIGHT_MIN,
+			      MT9P031_WINDOW_HEIGHT_MAX);
+
+	rect.width = min_t(unsigned int, rect.width,
+			   MT9P031_PIXEL_ARRAY_WIDTH - rect.left);
+	rect.height = min_t(unsigned int, rect.height,
+			    MT9P031_PIXEL_ARRAY_HEIGHT - rect.top);
 
 	__crop = __mt9p031_get_pad_crop(mt9p031, fh, crop->pad, crop->which);
 
diff --git a/drivers/media/i2c/mt9t001.c b/drivers/media/i2c/mt9t001.c
index 7964634..d41c70e 100644
--- a/drivers/media/i2c/mt9t001.c
+++ b/drivers/media/i2c/mt9t001.c
@@ -291,10 +291,12 @@ static int mt9t001_set_format(struct v4l2_subdev *subdev,
 
 	/* Clamp the width and height to avoid dividing by zero. */
 	width = clamp_t(unsigned int, ALIGN(format->format.width, 2),
-			max(__crop->width / 8, MT9T001_WINDOW_HEIGHT_MIN + 1),
+			max_t(unsigned int, __crop->width / 8,
+			      MT9T001_WINDOW_HEIGHT_MIN + 1),
 			__crop->width);
 	height = clamp_t(unsigned int, ALIGN(format->format.height, 2),
-			 max(__crop->height / 8, MT9T001_WINDOW_HEIGHT_MIN + 1),
+			 max_t(unsigned int, __crop->height / 8,
+			       MT9T001_WINDOW_HEIGHT_MIN + 1),
 			 __crop->height);
 
 	hratio = DIV_ROUND_CLOSEST(__crop->width, width);
@@ -339,15 +341,17 @@ static int mt9t001_set_crop(struct v4l2_subdev *subdev,
 	rect.top = clamp(ALIGN(crop->rect.top, 2),
 			 MT9T001_ROW_START_MIN,
 			 MT9T001_ROW_START_MAX);
-	rect.width = clamp(ALIGN(crop->rect.width, 2),
-			   MT9T001_WINDOW_WIDTH_MIN + 1,
-			   MT9T001_WINDOW_WIDTH_MAX + 1);
-	rect.height = clamp(ALIGN(crop->rect.height, 2),
-			    MT9T001_WINDOW_HEIGHT_MIN + 1,
-			    MT9T001_WINDOW_HEIGHT_MAX + 1);
-
-	rect.width = min(rect.width, MT9T001_PIXEL_ARRAY_WIDTH - rect.left);
-	rect.height = min(rect.height, MT9T001_PIXEL_ARRAY_HEIGHT - rect.top);
+	rect.width = clamp_t(unsigned int, ALIGN(crop->rect.width, 2),
+			     MT9T001_WINDOW_WIDTH_MIN + 1,
+			     MT9T001_WINDOW_WIDTH_MAX + 1);
+	rect.height = clamp_t(unsigned int, ALIGN(crop->rect.height, 2),
+			      MT9T001_WINDOW_HEIGHT_MIN + 1,
+			      MT9T001_WINDOW_HEIGHT_MAX + 1);
+
+	rect.width = min_t(unsigned int, rect.width,
+			   MT9T001_PIXEL_ARRAY_WIDTH - rect.left);
+	rect.height = min_t(unsigned int, rect.height,
+			    MT9T001_PIXEL_ARRAY_HEIGHT - rect.top);
 
 	__crop = __mt9t001_get_pad_crop(mt9t001, fh, crop->pad, crop->which);
 
diff --git a/drivers/media/i2c/mt9v032.c b/drivers/media/i2c/mt9v032.c
index 2c50eff..ba8da9b 100644
--- a/drivers/media/i2c/mt9v032.c
+++ b/drivers/media/i2c/mt9v032.c
@@ -420,12 +420,14 @@ static int mt9v032_set_format(struct v4l2_subdev *subdev,
 					format->which);
 
 	/* Clamp the width and height to avoid dividing by zero. */
-	width = clamp_t(unsigned int, ALIGN(format->format.width, 2),
-			max(__crop->width / 8, MT9V032_WINDOW_WIDTH_MIN),
-			__crop->width);
-	height = clamp_t(unsigned int, ALIGN(format->format.height, 2),
-			 max(__crop->height / 8, MT9V032_WINDOW_HEIGHT_MIN),
-			 __crop->height);
+	width = clamp(ALIGN(format->format.width, 2),
+		      max_t(unsigned int, __crop->width / 8,
+			    MT9V032_WINDOW_WIDTH_MIN),
+		      __crop->width);
+	height = clamp(ALIGN(format->format.height, 2),
+		       max_t(unsigned int, __crop->height / 8,
+			     MT9V032_WINDOW_HEIGHT_MIN),
+		       __crop->height);
 
 	hratio = DIV_ROUND_CLOSEST(__crop->width, width);
 	vratio = DIV_ROUND_CLOSEST(__crop->height, height);
@@ -471,15 +473,17 @@ static int mt9v032_set_crop(struct v4l2_subdev *subdev,
 	rect.top = clamp(ALIGN(crop->rect.top + 1, 2) - 1,
 			 MT9V032_ROW_START_MIN,
 			 MT9V032_ROW_START_MAX);
-	rect.width = clamp(ALIGN(crop->rect.width, 2),
-			   MT9V032_WINDOW_WIDTH_MIN,
-			   MT9V032_WINDOW_WIDTH_MAX);
-	rect.height = clamp(ALIGN(crop->rect.height, 2),
-			    MT9V032_WINDOW_HEIGHT_MIN,
-			    MT9V032_WINDOW_HEIGHT_MAX);
-
-	rect.width = min(rect.width, MT9V032_PIXEL_ARRAY_WIDTH - rect.left);
-	rect.height = min(rect.height, MT9V032_PIXEL_ARRAY_HEIGHT - rect.top);
+	rect.width = clamp_t(unsigned int, ALIGN(crop->rect.width, 2),
+			     MT9V032_WINDOW_WIDTH_MIN,
+			     MT9V032_WINDOW_WIDTH_MAX);
+	rect.height = clamp_t(unsigned int, ALIGN(crop->rect.height, 2),
+			      MT9V032_WINDOW_HEIGHT_MIN,
+			      MT9V032_WINDOW_HEIGHT_MAX);
+
+	rect.width = min_t(unsigned int,
+			   rect.width, MT9V032_PIXEL_ARRAY_WIDTH - rect.left);
+	rect.height = min_t(unsigned int,
+			    rect.height, MT9V032_PIXEL_ARRAY_HEIGHT - rect.top);
 
 	__crop = __mt9v032_get_pad_crop(mt9v032, fh, crop->pad, crop->which);
 
diff --git a/drivers/media/i2c/smiapp/smiapp-core.c b/drivers/media/i2c/smiapp/smiapp-core.c
index ae66d91..3fadb9e 100644
--- a/drivers/media/i2c/smiapp/smiapp-core.c
+++ b/drivers/media/i2c/smiapp/smiapp-core.c
@@ -2028,8 +2028,8 @@ static int smiapp_set_crop(struct v4l2_subdev *subdev,
 	sel->r.width = min(sel->r.width, src_size->width);
 	sel->r.height = min(sel->r.height, src_size->height);
 
-	sel->r.left = min(sel->r.left, src_size->width - sel->r.width);
-	sel->r.top = min(sel->r.top, src_size->height - sel->r.height);
+	sel->r.left = min_t(int, sel->r.left, src_size->width - sel->r.width);
+	sel->r.top = min_t(int, sel->r.top, src_size->height - sel->r.height);
 
 	*crops[sel->pad] = sel->r;
 
@@ -2121,8 +2121,8 @@ static int smiapp_set_selection(struct v4l2_subdev *subdev,
 
 	sel->r.left = max(0, sel->r.left & ~1);
 	sel->r.top = max(0, sel->r.top & ~1);
-	sel->r.width = max(0, SMIAPP_ALIGN_DIM(sel->r.width, sel->flags));
-	sel->r.height = max(0, SMIAPP_ALIGN_DIM(sel->r.height, sel->flags));
+	sel->r.width = SMIAPP_ALIGN_DIM(sel->r.width, sel->flags);
+	sel->r.height =	SMIAPP_ALIGN_DIM(sel->r.height, sel->flags);
 
 	sel->r.width = max_t(unsigned int,
 			     sensor->limits[SMIAPP_LIMIT_MIN_X_OUTPUT_SIZE],
diff --git a/drivers/media/i2c/soc_camera/mt9m111.c b/drivers/media/i2c/soc_camera/mt9m111.c
index 6f40566..ccf5940 100644
--- a/drivers/media/i2c/soc_camera/mt9m111.c
+++ b/drivers/media/i2c/soc_camera/mt9m111.c
@@ -208,8 +208,8 @@ struct mt9m111 {
 	struct mt9m111_context *ctx;
 	struct v4l2_rect rect;	/* cropping rectangle */
 	struct v4l2_clk *clk;
-	int width;		/* output */
-	int height;		/* sizes */
+	unsigned int width;	/* output */
+	unsigned int height;	/* sizes */
 	struct mutex power_lock; /* lock to protect power_count */
 	int power_count;
 	const struct mt9m111_datafmt *fmt;
diff --git a/drivers/media/i2c/tvp5150.c b/drivers/media/i2c/tvp5150.c
index 89c0b13..7b8962e 100644
--- a/drivers/media/i2c/tvp5150.c
+++ b/drivers/media/i2c/tvp5150.c
@@ -867,7 +867,7 @@ static int tvp5150_s_crop(struct v4l2_subdev *sd, const struct v4l2_crop *a)
 	struct v4l2_rect rect = a->c;
 	struct tvp5150 *decoder = to_tvp5150(sd);
 	v4l2_std_id std;
-	int hmax;
+	unsigned int hmax;
 
 	v4l2_dbg(1, debug, sd, "%s left=%d, top=%d, width=%d, height=%d\n",
 		__func__, rect.left, rect.top, rect.width, rect.height);
@@ -877,9 +877,9 @@ static int tvp5150_s_crop(struct v4l2_subdev *sd, const struct v4l2_crop *a)
 
 	/* tvp5150 has some special limits */
 	rect.left = clamp(rect.left, 0, TVP5150_MAX_CROP_LEFT);
-	rect.width = clamp(rect.width,
-			   TVP5150_H_MAX - TVP5150_MAX_CROP_LEFT - rect.left,
-			   TVP5150_H_MAX - rect.left);
+	rect.width = clamp_t(unsigned int, rect.width,
+			     TVP5150_H_MAX - TVP5150_MAX_CROP_LEFT - rect.left,
+			     TVP5150_H_MAX - rect.left);
 	rect.top = clamp(rect.top, 0, TVP5150_MAX_CROP_TOP);
 
 	/* Calculate height based on current standard */
@@ -893,9 +893,9 @@ static int tvp5150_s_crop(struct v4l2_subdev *sd, const struct v4l2_crop *a)
 	else
 		hmax = TVP5150_V_MAX_OTHERS;
 
-	rect.height = clamp(rect.height,
-			    hmax - TVP5150_MAX_CROP_TOP - rect.top,
-			    hmax - rect.top);
+	rect.height = clamp_t(unsigned int, rect.height,
+			      hmax - TVP5150_MAX_CROP_TOP - rect.top,
+			      hmax - rect.top);
 
 	tvp5150_write(sd, TVP5150_VERT_BLANKING_START, rect.top);
 	tvp5150_write(sd, TVP5150_VERT_BLANKING_STOP,
diff --git a/drivers/media/pci/bt8xx/bttv-driver.c b/drivers/media/pci/bt8xx/bttv-driver.c
index c6532de..41ec4fa 100644
--- a/drivers/media/pci/bt8xx/bttv-driver.c
+++ b/drivers/media/pci/bt8xx/bttv-driver.c
@@ -1126,9 +1126,9 @@ bttv_crop_calc_limits(struct bttv_crop *c)
 		c->min_scaled_height = 32;
 	} else {
 		c->min_scaled_width =
-			(max(48, c->rect.width >> 4) + 3) & ~3;
+			(max_t(unsigned int, 48, c->rect.width >> 4) + 3) & ~3;
 		c->min_scaled_height =
-			max(32, c->rect.height >> 4);
+			max_t(unsigned int, 32, c->rect.height >> 4);
 	}
 
 	c->max_scaled_width  = c->rect.width & ~3;
@@ -2024,7 +2024,7 @@ limit_scaled_size_lock       (struct bttv_fh *               fh,
 		/* We cannot scale up. When the scaled image is larger
 		   than crop.rect we adjust the crop.rect as required
 		   by the V4L2 spec, hence cropcap.bounds are our limit. */
-		max_width = min(b->width, (__s32) MAX_HACTIVE);
+		max_width = min_t(unsigned int, b->width, MAX_HACTIVE);
 		max_height = b->height;
 
 		/* We cannot capture the same line as video and VBI data.
diff --git a/drivers/media/pci/saa7134/saa7134-video.c b/drivers/media/pci/saa7134/saa7134-video.c
index fb60da8..bdbd805 100644
--- a/drivers/media/pci/saa7134/saa7134-video.c
+++ b/drivers/media/pci/saa7134/saa7134-video.c
@@ -1979,10 +1979,6 @@ static int saa7134_s_crop(struct file *file, void *f, const struct v4l2_crop *cr
 	if (crop->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
 	    crop->type != V4L2_BUF_TYPE_VIDEO_OVERLAY)
 		return -EINVAL;
-	if (crop->c.height < 0)
-		return -EINVAL;
-	if (crop->c.width < 0)
-		return -EINVAL;
 
 	if (res_locked(fh->dev, RESOURCE_OVERLAY))
 		return -EBUSY;
diff --git a/drivers/media/platform/soc_camera/soc_scale_crop.c b/drivers/media/platform/soc_camera/soc_scale_crop.c
index cbd3a34..8e74fb7 100644
--- a/drivers/media/platform/soc_camera/soc_scale_crop.c
+++ b/drivers/media/platform/soc_camera/soc_scale_crop.c
@@ -141,8 +141,8 @@ int soc_camera_client_s_crop(struct v4l2_subdev *sd,
 	 * Popular special case - some cameras can only handle fixed sizes like
 	 * QVGA, VGA,... Take care to avoid infinite loop.
 	 */
-	width = max(cam_rect->width, 2);
-	height = max(cam_rect->height, 2);
+	width = max_t(unsigned int, cam_rect->width, 2);
+	height = max_t(unsigned int, cam_rect->height, 2);
 
 	/*
 	 * Loop as long as sensor is not covering the requested rectangle and
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 437f1b0..6ae7bbe 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -207,8 +207,8 @@ enum v4l2_priority {
 struct v4l2_rect {
 	__s32   left;
 	__s32   top;
-	__s32   width;
-	__s32   height;
+	__u32   width;
+	__u32   height;
 };
 
 struct v4l2_fract {
-- 
1.8.4.rc3

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