On Sun April 21 2013 21:00:32 Mauro Carvalho Chehab wrote: > As SDR devices are not video, VBI or RDS devices, it needs > its own buffer type for capture. > > Also, as discussed at: > http://comments.gmane.org/gmane.linux.drivers.video-input-infrastructure/63123 > > It should be a way to enumerate and select the formats that the > hardware supports, as one hardware may accept more than one format > (cx88, for example, can likely support several different formats, > as it will depend on how the RISC code for it will be written). > > So, add a a new stream type (V4L2_BUF_TYPE_SDR_CAPTURE) at the > V4L2 API, and the corresponding buffer function handlers. > > Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> > --- > Documentation/DocBook/media/v4l/dev-capture.xml | 26 ++++++++++++-------- > Documentation/DocBook/media/v4l/io.xml | 6 +++++ > drivers/media/v4l2-core/v4l2-ioctl.c | 32 +++++++++++++++++++++++++ > include/media/v4l2-ioctl.h | 8 +++++++ > include/uapi/linux/videodev2.h | 3 ++- > 5 files changed, 64 insertions(+), 11 deletions(-) > > diff --git a/Documentation/DocBook/media/v4l/dev-capture.xml b/Documentation/DocBook/media/v4l/dev-capture.xml > index e1c5f94..7797d2d 100644 > --- a/Documentation/DocBook/media/v4l/dev-capture.xml > +++ b/Documentation/DocBook/media/v4l/dev-capture.xml > @@ -44,7 +44,7 @@ all video capture devices.</para> > </section> > > <section> > - <title>Image Format Negotiation</title> > + <title>Streaming Format Negotiation</title> > > <para>The result of a capture operation is determined by > cropping and image format parameters. The former select an area of the > @@ -65,13 +65,18 @@ linkend="crop" />.</para> > > <para>To query the current image format applications set the > <structfield>type</structfield> field of a &v4l2-format; to > -<constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant> or > -<constant>V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE</constant> and call the > -&VIDIOC-G-FMT; ioctl with a pointer to this structure. Drivers fill > -the &v4l2-pix-format; <structfield>pix</structfield> or the > -&v4l2-pix-format-mplane; <structfield>pix_mp</structfield> member of the > +<constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant>, > +<constant>V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE</constant> or > +<constant>V4L2_BUF_TYPE_VIDEO_SDR_CAPTURE</constant> or s/V4L2_BUF_TYPE_VIDEO_SDR_CAPTURE/V4L2_BUF_TYPE_SDR_CAPTURE/ > +and call the &VIDIOC-G-FMT; ioctl with a pointer to this structure.</para> > + Regards, Hans -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
