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Commit e3d6eb1c authored by Vincent Palatin's avatar Vincent Palatin Committed by Mauro Carvalho Chehab
Browse files

[media] v4l: Add camera pan/tilt speed controls 



The V4L2_CID_PAN_SPEED and V4L2_CID_TILT_SPEED controls allow to move the
camera by setting its rotation speed around its axis.

Signed-off-by: default avatarVincent Palatin <vpalatin@chromium.org>
Reviewed-by: default avatarPawel Osciak <posciak@chromium.org>
Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent 7000e325

Documentation/DocBook/media/v4l/compat.xml

+10 −0
Original line number Diff line number Diff line
@@ -2545,6 +2545,16 @@ fields changed from _s32 to _u32. 
      </orderedlist>

    </section>



    <section>

      <title>V4L2 in Linux 3.18</title>

      <orderedlist>

	<listitem>

	  <para>Added <constant>V4L2_CID_PAN_SPEED</constant> and

 <constant>V4L2_CID_TILT_SPEED</constant> camera controls.</para>

	</listitem>

      </orderedlist>

    </section>



    <section id="other">

      <title>Relation of V4L2 to other Linux multimedia APIs</title>

Documentation/DocBook/media/v4l/controls.xml

+21 −0
Original line number Diff line number Diff line
@@ -3965,6 +3965,27 @@ by exposure, white balance or focus controls.</entry> 
	  </row>

	  <row><entry></entry></row>



	  <row>

	    <entry spanname="id"><constant>V4L2_CID_PAN_SPEED</constant>&nbsp;</entry>

	    <entry>integer</entry>

	  </row><row><entry spanname="descr">This control turns the

camera horizontally at the specific speed. The unit is undefined. A

positive value moves the camera to the right (clockwise when viewed

from above), a negative value to the left. A value of zero stops the motion

if one is in progress and has no effect otherwise.</entry>

	  </row>

	  <row><entry></entry></row>



	  <row>

	    <entry spanname="id"><constant>V4L2_CID_TILT_SPEED</constant>&nbsp;</entry>

	    <entry>integer</entry>

	  </row><row><entry spanname="descr">This control turns the

camera vertically at the specified speed. The unit is undefined. A

positive value moves the camera up, a negative value down. A value of zero

stops the motion if one is in progress and has no effect otherwise.</entry>

	  </row>

	  <row><entry></entry></row>



	</tbody>

      </tgroup>

    </table>

drivers/media/v4l2-core/v4l2-ctrls.c

+2 −0
Original line number Diff line number Diff line
@@ -796,6 +796,8 @@ const char *v4l2_ctrl_get_name(u32 id) 
	case V4L2_CID_AUTO_FOCUS_STOP:		return "Auto Focus, Stop";

	case V4L2_CID_AUTO_FOCUS_STATUS:	return "Auto Focus, Status";

	case V4L2_CID_AUTO_FOCUS_RANGE:		return "Auto Focus, Range";

	case V4L2_CID_PAN_SPEED:		return "Pan, Speed";

	case V4L2_CID_TILT_SPEED:		return "Tilt, Speed";



	/* FM Radio Modulator controls */

	/* Keep the order of the 'case's the same as in v4l2-controls.h! */

include/uapi/linux/v4l2-controls.h

+2 −0
Original line number Diff line number Diff line
@@ -746,6 +746,8 @@ enum v4l2_auto_focus_range { 
	V4L2_AUTO_FOCUS_RANGE_INFINITY		= 3,

};



#define V4L2_CID_PAN_SPEED			(V4L2_CID_CAMERA_CLASS_BASE+32)

#define V4L2_CID_TILT_SPEED			(V4L2_CID_CAMERA_CLASS_BASE+33)



/* FM Modulator class control IDs */