diff options
Diffstat (limited to 'v4l2-spec/dev-rds.sgml')
| -rw-r--r-- | v4l2-spec/dev-rds.sgml | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/v4l2-spec/dev-rds.sgml b/v4l2-spec/dev-rds.sgml index 8f357d9f0..9d59d0cb0 100644 --- a/v4l2-spec/dev-rds.sgml +++ b/v4l2-spec/dev-rds.sgml @@ -24,16 +24,24 @@ be needed, then please contact the linux-media mailing list: &v4l-ml;.</para> <para>Devices supporting the RDS capturing API set the <constant>V4L2_CAP_RDS_CAPTURE</constant> flag in the <structfield>capabilities</structfield> field of &v4l2-capability; -returned by the &VIDIOC-QUERYCAP; ioctl.</para> - - <para>Any tuner that supports RDS will set the +returned by the &VIDIOC-QUERYCAP; ioctl. +Any tuner that supports RDS will set the <constant>V4L2_TUNER_CAP_RDS</constant> flag in the <structfield>capability</structfield> -field of &v4l2-tuner;.</para> - - <para>Whether an RDS signal is present can be detected by looking at +field of &v4l2-tuner;. +Whether an RDS signal is present can be detected by looking at the <structfield>rxsubchans</structfield> field of &v4l2-tuner;: the <constant>V4L2_TUNER_SUB_RDS</constant> will be set if RDS data was detected.</para> + <para>Devices supporting the RDS output API +set the <constant>V4L2_CAP_RDS_OUTPUT</constant> flag in +the <structfield>capabilities</structfield> field of &v4l2-capability; +returned by the &VIDIOC-QUERYCAP; ioctl. +Any modulator that supports RDS will set the +<constant>V4L2_TUNER_CAP_RDS</constant> flag in the <structfield>capability</structfield> +field of &v4l2-modulator;. +In order to enable the RDS transmission one must set the <constant>V4L2_TUNER_SUB_RDS</constant> +bit in the <structfield>txsubchans</structfield> field of &v4l2-modulator;.</para> + </section> <section> |