diff options
Diffstat (limited to 'Documentation/media/uapi/v4l/dev-raw-vbi.rst')
| -rw-r--r-- | Documentation/media/uapi/v4l/dev-raw-vbi.rst | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/Documentation/media/uapi/v4l/dev-raw-vbi.rst b/Documentation/media/uapi/v4l/dev-raw-vbi.rst index 95de08b8fbf2..859b5bc8abbb 100644 --- a/Documentation/media/uapi/v4l/dev-raw-vbi.rst +++ b/Documentation/media/uapi/v4l/dev-raw-vbi.rst @@ -196,10 +196,9 @@ and always returns default parameters as :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` does driver. Anyway, drivers may not support single field capturing and return both count values non-zero. - Both ``count`` values set to zero, or line numbers outside the - bounds depicted in :ref:`vbi-525` and :ref:`vbi-625`, or a - field image covering lines of two fields, are invalid and shall - not be returned by the driver. + Both ``count`` values set to zero, or line numbers are outside the + bounds depicted\ [#f4]_, or a field image covering lines of two + fields, are invalid and shall not be returned by the driver. To initialize the ``start`` and ``count`` fields, applications must first determine the current video standard selection. The @@ -352,3 +351,6 @@ another process. Most VBI services transmit on both fields, but some have different semantics depending on the field number. These cannot be reliable decoded or encoded when ``V4L2_VBI_UNSYNC`` is set. + +.. [#f4] + The valid values ar shown at :ref:`vbi-525` and :ref:`vbi-625`. |