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| author | Sylwester Nawrocki <sylvester.nawrocki@gmail.com> | 2013-01-19 15:51:55 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-02-05 15:04:06 -0200 |
| commit | 2ccbe779bcdee130ea7f1525670dc9d60318a981 (patch) | |
| tree | f667acca6ab42a0565b062616b3a6f176508e874 /Documentation/DocBook | |
| parent | af9bb33aa33d4beb5d0ac505d48530a56856f66c (diff) | |
| download | linux-2ccbe779bcdee130ea7f1525670dc9d60318a981.tar.bz2 | |
[media] v4l2-ctrl: Add helper function for the controls range update
This patch adds a helper function that allows to modify range,
i.e. minimum, maximum, step and default value of a v4l2 control,
after the control has been created and initialized. This is helpful
in situations when range of a control depends on user configurable
parameters, e.g. camera sensor absolute exposure time depending on
an output image resolution and frame rate.
v4l2_ctrl_modify_range() function allows to modify range of an
INTEGER, BOOL, MENU, INTEGER_MENU and BITMASK type controls.
Based on a patch from Hans Verkuil http://patchwork.linuxtv.org/patch/8654.
Signed-off-by: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'Documentation/DocBook')
| -rw-r--r-- | Documentation/DocBook/media/v4l/compat.xml | 4 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/v4l2.xml | 4 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/vidioc-dqevent.xml | 6 |
3 files changed, 13 insertions, 1 deletions
diff --git a/Documentation/DocBook/media/v4l/compat.xml b/Documentation/DocBook/media/v4l/compat.xml index ebd2bfd1ee8e..104a1a2b8849 100644 --- a/Documentation/DocBook/media/v4l/compat.xml +++ b/Documentation/DocBook/media/v4l/compat.xml @@ -2486,6 +2486,10 @@ that used it. It was originally scheduled for removal in 2.6.35. <structname>v4l2_buffer</structname>. See <xref linkend="buffer-flags" />.</para> </listitem> + <listitem> + <para>Added <constant>V4L2_EVENT_CTRL_CH_RANGE</constant> control event + changes flag. See <xref linkend="changes-flags"/>.</para> + </listitem> </orderedlist> </section> diff --git a/Documentation/DocBook/media/v4l/v4l2.xml b/Documentation/DocBook/media/v4l/v4l2.xml index 8fe29427c8e4..c3851a2fb50d 100644 --- a/Documentation/DocBook/media/v4l/v4l2.xml +++ b/Documentation/DocBook/media/v4l/v4l2.xml @@ -142,10 +142,12 @@ applications. --> <revision> <revnumber>3.9</revnumber> <date>2012-12-03</date> - <authorinitials>sa</authorinitials> + <authorinitials>sa, sn</authorinitials> <revremark>Added timestamp types to <structname>v4l2_buffer</structname>, see <xref linkend="buffer-flags" />. + Added <constant>V4L2_EVENT_CTRL_CH_RANGE</constant> control + event changes flag, see <xref linkend="changes-flags"/>. </revremark> </revision> diff --git a/Documentation/DocBook/media/v4l/vidioc-dqevent.xml b/Documentation/DocBook/media/v4l/vidioc-dqevent.xml index 98a856f9ec30..89891adb928a 100644 --- a/Documentation/DocBook/media/v4l/vidioc-dqevent.xml +++ b/Documentation/DocBook/media/v4l/vidioc-dqevent.xml @@ -261,6 +261,12 @@ <entry>This control event was triggered because the control flags changed.</entry> </row> + <row> + <entry><constant>V4L2_EVENT_CTRL_CH_RANGE</constant></entry> + <entry>0x0004</entry> + <entry>This control event was triggered because the minimum, + maximum, step or the default value of the control changed.</entry> + </row> </tbody> </tgroup> </table> |