1. Updated for V4L2_CID_BG_COLOR
2. Updated for V4L2_CID_ROTATION
Both of the above are discussed in length with community
3. Updated for new flags and capability field added
to v4l2_frame buffer structure.
Community comments fixed in this post
1. Fixed Few typos.
2. Changed V4L2_CID_ROTATION to V4L2_CID_ROTATE
3. Re-framed source chroma keying related explanation
Signed-off-by: Brijesh Jadav <brijesh.j@xxxxxx>
Signed-off-by: Hardik Shah <hardik.shah@xxxxxx>
Signed-off-by: Vaibhav Hiremath <hvaibhav@xxxxxx>
---
v4l2-spec/controls.sgml | 19 ++++++++++++++++++-
v4l2-spec/vidioc-g-fbuf.sgml | 19 +++++++++++++++++++
2 files changed, 37 insertions(+), 1 deletions(-)
diff --git a/v4l2-spec/controls.sgml b/v4l2-spec/controls.sgml
index 477a970..3a91061 100644
--- a/v4l2-spec/controls.sgml
+++ b/v4l2-spec/controls.sgml
@@ -281,10 +281,27 @@ minimum value disables backlight compensation.</entry>
<constant>V4L2_COLORFX_SEPIA</constant> (2).</entry>
</row>
<row>
+ <entry><constant>V4L2_CID_ROTATE</constant></entry>
+ <entry>integer</entry>
+ <entry>Rotates the image by specified angle. Common angles are 90, 270,
+and 180. Rotating the image to 90 and 270 will reverse the height and width of
+the display window. It is necessary to set the new height and width of the picture
+using S_FMT ioctl see <xref linkend="vidioc-g-fmt"> according to the rotation angle selected</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_BG_COLOR</constant></entry>
+ <entry>integer</entry>
+ <entry>Sets the background color of the current output device.
+Background color needs to be specified in the RGB24 format. The supplied 32
+bit value is intepreted as Bits 0-7 Red color information, Bits 8-15 Green color
+information, Bits 16-23 Blue color information and Bits 24-31 must be
+zero.</entry>
+ </row>
+ <row>
<entry><constant>V4L2_CID_LASTP1</constant></entry>
<entry></entry>
<entry>End of the predefined control IDs (currently
-<constant>V4L2_CID_COLORFX</constant> + 1).</entry>
+<constant>V4L2_CID_BG_COLOR</constant> + 1).</entry>
</row>
<row>
<entry><constant>V4L2_CID_PRIVATE_BASE</constant></entry>
diff --git a/v4l2-spec/vidioc-g-fbuf.sgml b/v4l2-spec/vidioc-g-fbuf.sgml
index 6781b53..13c9ac6 100644
--- a/v4l2-spec/vidioc-g-fbuf.sgml
+++ b/v4l2-spec/vidioc-g-fbuf.sgml
@@ -336,6 +336,13 @@ alpha value. Alpha blending makes no sense for destructive overlays.</entry>
inverted alpha channel of the framebuffer or VGA signal. Alpha
blending makes no sense for destructive overlays.</entry>
</row>
+ <row>
+ <entry><constant>V4L2_FBUF_CAP_SRC_CHROMAKEY</constant></entry>
+ <entry>0x0080</entry>
+ <entry>The device supports source chroma keying. Video pixels
+ with the chromakey color are replaced by the framebuffer pixels.
+ Exactly opposite of <constant>V4L2_FBUF_CAP_CHROMAKEY</constant></entry>
+ </row>
</tbody>
</tgroup>
</table>
@@ -411,6 +418,18 @@ images, but with an inverted alpha value. The blend function is:
output = framebuffer pixel * (1 - alpha) + video pixel * alpha. The
actual alpha depth depends on the framebuffer pixel format.</entry>
</row>
+ <row>
+ <entry><constant>V4L2_FBUF_FLAG_SRC_CHROMAKEY</constant></entry>
+ <entry>0x0040</entry>
+ <entry>Use source chroma-keying. The chroma-key color is
+determined by the <structfield>chromakey</structfield> field of
+&v4l2-window; and negotiated with the &VIDIOC-S-FMT; ioctl, see <xref
+linkend="overlay"> and <xref linkend="osd">.
+Since any one of the chroma keying can be active at a time as both
+of them are exactly opposite, the same <structfield>chromakey</structfield>
+field of &v4l2-window; can be used to set the chroma key for source
+keying also.</entry>
+ </row>
</tbody>
</tgroup>
</table>
--
1.6.0.3
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