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[media] V4L: Add camera auto focus controls

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Add following auto focus controls:

 - V4L2_CID_AUTO_FOCUS_START - single-shot auto focus start
 - V4L2_CID_AUTO_FOCUS_STOP -  single-shot auto focus stop
 - V4L2_CID_AUTO_FOCUS_STATUS - automatic focus status
 - V4L2_CID_AUTO_FOCUS_RANGE - automatic focus scan range selection

Signed-off-by: Sylwester Nawrocki <[email protected]>
Signed-off-by: Kyungmin Park <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
This commit is contained in:
Sylwester Nawrocki 2012-05-11 06:37:03 -03:00 • committed by Mauro Carvalho Chehab
commit 2272ab657b
5 changed files with 158 additions and 4 deletions
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19
Documentation/DocBook/media/v4l/compat.xml
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@ -2435,6 +2435,21 @@ details.</para>
<listitem>
<para> Added <constant>V4L2_CID_COLORFX_CBCR</constant> control.</para>
</listitem>
<listitem>
<para> Added camera controls <constant>V4L2_CID_AUTO_EXPOSURE_BIAS</constant>,
<constant>V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE</constant>,
<constant>V4L2_CID_IMAGE_STABILIZATION</constant>,
<constant>V4L2_CID_ISO_SENSITIVITY</constant>,
<constant>V4L2_CID_ISO_SENSITIVITY_AUTO</constant>,
<constant>V4L2_CID_EXPOSURE_METERING</constant>,
<constant>V4L2_CID_SCENE_MODE</constant>,
<constant>V4L2_CID_3A_LOCK</constant>,
<constant>V4L2_CID_AUTO_FOCUS_START</constant>,
<constant>V4L2_CID_AUTO_FOCUS_STOP</constant>,
<constant>V4L2_CID_AUTO_FOCUS_STATUS</constant> and
<constant>V4L2_CID_AUTO_FOCUS_RANGE</constant>.
</para>
</listitem>
</orderedlist>
</section>
@ -2555,6 +2570,10 @@ ioctls.</para>
<para>Sub-device selection API: &VIDIOC-SUBDEV-G-SELECTION;
and &VIDIOC-SUBDEV-S-SELECTION; ioctls.</para>
</listitem>
<listitem>
<para><link linkend="v4l2-auto-focus-area"><constant>
V4L2_CID_AUTO_FOCUS_AREA</constant></link> control.</para>
</listitem>
</itemizedlist>
</section>

98
Documentation/DocBook/media/v4l/controls.xml
View file

@ -2976,12 +2976,106 @@ negative values towards infinity. This is a write-only control.</entry>
<row>
<entry spanname="id"><constant>V4L2_CID_FOCUS_AUTO</constant>&nbsp;</entry>
<entry>boolean</entry>
</row><row><entry spanname="descr">Enables automatic focus
adjustments. The effect of manual focus adjustments while this feature
</row><row><entry spanname="descr">Enables continuous automatic
focus adjustments. The effect of manual focus adjustments while this feature
is enabled is undefined, drivers should ignore such requests.</entry>
</row>
<row><entry></entry></row>
<row>
<entry spanname="id"><constant>V4L2_CID_AUTO_FOCUS_START</constant>&nbsp;</entry>
<entry>button</entry>
</row><row><entry spanname="descr">Starts single auto focus process.
The effect of setting this control when <constant>V4L2_CID_FOCUS_AUTO</constant>
is set to <constant>TRUE</constant> (1) is undefined, drivers should ignore
such requests.</entry>
</row>
<row><entry></entry></row>
<row>
<entry spanname="id"><constant>V4L2_CID_AUTO_FOCUS_STOP</constant>&nbsp;</entry>
<entry>button</entry>
</row><row><entry spanname="descr">Aborts automatic focusing
started with <constant>V4L2_CID_AUTO_FOCUS_START</constant> control. It is
effective only when the continuous autofocus is disabled, that is when
<constant>V4L2_CID_FOCUS_AUTO</constant> control is set to <constant>FALSE
</constant> (0).</entry>
</row>
<row><entry></entry></row>
<row id="v4l2-auto-focus-status">
<entry spanname="id">
<constant>V4L2_CID_AUTO_FOCUS_STATUS</constant>&nbsp;</entry>
<entry>bitmask</entry>
</row>
<row><entry spanname="descr">The automatic focus status. This is a read-only
control.</entry>
</row>
<row>
<entrytbl spanname="descr" cols="2">
<tbody valign="top">
<row>
<entry><constant>V4L2_AUTO_FOCUS_STATUS_IDLE</constant>&nbsp;</entry>
<entry>Automatic focus is not active.</entry>
</row>
<row>
<entry><constant>V4L2_AUTO_FOCUS_STATUS_BUSY</constant>&nbsp;</entry>
<entry>Automatic focusing is in progress.</entry>
</row>
<row>
<entry><constant>V4L2_AUTO_FOCUS_STATUS_REACHED</constant>&nbsp;</entry>
<entry>Focus has been reached.</entry>
</row>
<row>
<entry><constant>V4L2_AUTO_FOCUS_STATUS_FAILED</constant>&nbsp;</entry>
<entry>Automatic focus has failed, the driver will not
transition from this state until another action is
performed by an application.</entry>
</row>
</tbody>
</entrytbl>
</row>
<row><entry spanname="descr">
Setting <constant>V4L2_LOCK_FOCUS</constant> lock bit of the <constant>V4L2_CID_3A_LOCK
</constant> control may stop updates of the <constant>V4L2_CID_AUTO_FOCUS_STATUS</constant>
control value.</entry>
</row>
<row><entry></entry></row>
<row id="v4l2-auto-focus-range">
<entry spanname="id">
<constant>V4L2_CID_AUTO_FOCUS_RANGE</constant>&nbsp;</entry>
<entry>enum&nbsp;v4l2_auto_focus_range</entry>
</row>
<row><entry spanname="descr">Determines auto focus distance range
for which lens may be adjusted. </entry>
</row>
<row>
<entrytbl spanname="descr" cols="2">
<tbody valign="top">
<row>
<entry><constant>V4L2_AUTO_FOCUS_RANGE_AUTO</constant>&nbsp;</entry>
<entry>The camera automatically selects the focus range.</entry>
</row>
<row>
<entry><constant>V4L2_AUTO_FOCUS_RANGE_NORMAL</constant>&nbsp;</entry>
<entry>Normal distance range, limited for best automatic focus
performance.</entry>
</row>
<row>
<entry><constant>V4L2_AUTO_FOCUS_RANGE_MACRO</constant>&nbsp;</entry>
<entry>Macro (close-up) auto focus. The camera will
use its minimum possible distance for auto focus.</entry>
</row>
<row>
<entry><constant>V4L2_AUTO_FOCUS_RANGE_INFINITY</constant>&nbsp;</entry>
<entry>The lens is set to focus on an object at infinite distance.</entry>
</row>
</tbody>
</entrytbl>
</row>
<row><entry></entry></row>
<row>
<entry spanname="id"><constant>V4L2_CID_ZOOM_ABSOLUTE</constant>&nbsp;</entry>
<entry>integer</entry>

9
Documentation/DocBook/media/v4l/v4l2.xml
View file

@ -140,11 +140,18 @@ applications. -->
<revision>
<revnumber>3.5</revnumber>
<date>2012-04-02</date>
<date>2012-05-07</date>
<authorinitials>sa, sn</authorinitials>
<revremark>Added V4L2_CTRL_TYPE_INTEGER_MENU and V4L2 subdev
selections API. Improved the description of V4L2_CID_COLORFX
control, added V4L2_CID_COLORFX_CBCR control.
Added camera controls V4L2_CID_AUTO_EXPOSURE_BIAS,
V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE, V4L2_CID_IMAGE_STABILIZATION,
V4L2_CID_ISO_SENSITIVITY, V4L2_CID_ISO_SENSITIVITY_AUTO,
V4L2_CID_EXPOSURE_METERING, V4L2_CID_SCENE_MODE,
V4L2_CID_3A_LOCK, V4L2_CID_AUTO_FOCUS_START,
V4L2_CID_AUTO_FOCUS_STOP, V4L2_CID_AUTO_FOCUS_STATUS
and V4L2_CID_AUTO_FOCUS_RANGE.
</revremark>
</revision>