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[media] DocBook/media: document the new RDS RX controls 

Document the new RDS receiver controls. This will be used by the radio-miropcm20
driver.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Hans Verkuil 2014-07-21 10:45:41 -03:00 коммит произвёл Mauro Carvalho Chehab
Родитель 9570a14847
Коммит 1a586e1a5b
1 изменённых файлов: 51 добавлений и 0 удалений
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51
Documentation/DocBook/media/v4l/controls.xml
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@ -5089,6 +5089,57 @@ description of this control class.</entry>
</row><row><entry spanname="descr">Enables/disables RDS
reception by the radio tuner</entry>
</row>
<row>
<entry spanname="id"><constant>V4L2_CID_RDS_RX_PTY</constant>&nbsp;</entry>
<entry>integer</entry>
</row>
<row><entry spanname="descr">Gets RDS Programme Type field.
This encodes up to 31 pre-defined programme types.</entry>
</row>
<row>
<entry spanname="id"><constant>V4L2_CID_RDS_RX_PS_NAME</constant>&nbsp;</entry>
<entry>string</entry>
</row>
<row><entry spanname="descr">Gets the Programme Service name (PS_NAME).
It is intended for static display on a receiver. It is the primary aid to listeners in programme service
identification and selection. In Annex E of <xref linkend="iec62106" />, the RDS specification,
there is a full description of the correct character encoding for Programme Service name strings.
Also from RDS specification, PS is usually a single eight character text. However, it is also possible
to find receivers which can scroll strings sized as 8 x N characters. So, this control must be configured
with steps of 8 characters. The result is it must always contain a string with size multiple of 8.</entry>
</row>
<row>
<entry spanname="id"><constant>V4L2_CID_RDS_RX_RADIO_TEXT</constant>&nbsp;</entry>
<entry>string</entry>
</row>
<row><entry spanname="descr">Gets the Radio Text info. It is a textual description of
what is being broadcasted. RDS Radio Text can be applied when broadcaster wishes to transmit longer PS names,
programme-related information or any other text. In these cases, RadioText can be used in addition to
<constant>V4L2_CID_RDS_RX_PS_NAME</constant>. The encoding for Radio Text strings is also fully described
in Annex E of <xref linkend="iec62106" />. The length of Radio Text strings depends on which RDS Block is being
used to transmit it, either 32 (2A block) or 64 (2B block). However, it is also possible
to find receivers which can scroll strings sized as 32 x N or 64 x N characters. So, this control must be configured
with steps of 32 or 64 characters. The result is it must always contain a string with size multiple of 32 or 64. </entry>
</row>
<row>
<entry spanname="id"><constant>V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT</constant>&nbsp;</entry>
<entry>boolean</entry>
</row>
<row><entry spanname="descr">If set, then a traffic announcement is in progress.</entry>
</row>
<row>
<entry spanname="id"><constant>V4L2_CID_RDS_RX_TRAFFIC_PROGRAM</constant>&nbsp;</entry>
<entry>boolean</entry>
</row>
<row><entry spanname="descr">If set, then the tuned programme carries traffic announcements.</entry>
</row>
<row>
<entry spanname="id"><constant>V4L2_CID_RDS_RX_MUSIC_SPEECH</constant>&nbsp;</entry>
<entry>boolean</entry>
</row>
<row><entry spanname="descr">If set, then this channel broadcasts music. If cleared, then it
broadcasts speech. If the transmitter doesn't make this distinction, then it will be set.</entry>
</row>
<row>
<entry spanname="id"><constant>V4L2_CID_TUNE_DEEMPHASIS</constant>&nbsp;</entry>
<entry>enum v4l2_deemphasis</entry>