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authorGravatar Mauro Carvalho Chehab <mchehab@s-opensource.com> 2016-07-27 06:32:31 -0300
committerGravatar Mauro Carvalho Chehab <mchehab@s-opensource.com> 2016-07-28 20:08:19 -0300
commit43f71d93a0cb342f0c918fba3f6abb7661e40ad2 (patch)
treea1dc7288bc480e7027ca1827ca4876472fa12e40 /Documentation/DocBook/media/v4l/vidioc-g-tuner.xml
parentMerge tag 'media/v4.8-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mch... (diff)
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doc-rst: Remove the media docbook
Now that all media documentation was converted to Sphinx, we should get rid of the old DocBook one, as we don't want people to submit patches against the old stuff. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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-<refentry id="vidioc-g-tuner">
- <refmeta>
- <refentrytitle>ioctl VIDIOC_G_TUNER, VIDIOC_S_TUNER</refentrytitle>
- &manvol;
- </refmeta>
-
- <refnamediv>
- <refname>VIDIOC_G_TUNER</refname>
- <refname>VIDIOC_S_TUNER</refname>
- <refpurpose>Get or set tuner attributes</refpurpose>
- </refnamediv>
-
- <refsynopsisdiv>
- <funcsynopsis>
- <funcprototype>
- <funcdef>int <function>ioctl</function></funcdef>
- <paramdef>int <parameter>fd</parameter></paramdef>
- <paramdef>int <parameter>request</parameter></paramdef>
- <paramdef>struct v4l2_tuner
-*<parameter>argp</parameter></paramdef>
- </funcprototype>
- </funcsynopsis>
- <funcsynopsis>
- <funcprototype>
- <funcdef>int <function>ioctl</function></funcdef>
- <paramdef>int <parameter>fd</parameter></paramdef>
- <paramdef>int <parameter>request</parameter></paramdef>
- <paramdef>const struct v4l2_tuner
-*<parameter>argp</parameter></paramdef>
- </funcprototype>
- </funcsynopsis>
- </refsynopsisdiv>
-
- <refsect1>
- <title>Arguments</title>
-
- <variablelist>
- <varlistentry>
- <term><parameter>fd</parameter></term>
- <listitem>
- <para>&fd;</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><parameter>request</parameter></term>
- <listitem>
- <para>VIDIOC_G_TUNER, VIDIOC_S_TUNER</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><parameter>argp</parameter></term>
- <listitem>
- <para></para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect1>
-
- <refsect1>
- <title>Description</title>
-
- <para>To query the attributes of a tuner applications initialize the
-<structfield>index</structfield> field and zero out the
-<structfield>reserved</structfield> array of a &v4l2-tuner; and call the
-<constant>VIDIOC_G_TUNER</constant> ioctl with a pointer to this
-structure. Drivers fill the rest of the structure or return an
-&EINVAL; when the index is out of bounds. To enumerate all tuners
-applications shall begin at index zero, incrementing by one until the
-driver returns <errorcode>EINVAL</errorcode>.</para>
-
- <para>Tuners have two writable properties, the audio mode and
-the radio frequency. To change the audio mode, applications initialize
-the <structfield>index</structfield>,
-<structfield>audmode</structfield> and
-<structfield>reserved</structfield> fields and call the
-<constant>VIDIOC_S_TUNER</constant> ioctl. This will
-<emphasis>not</emphasis> change the current tuner, which is determined
-by the current video input. Drivers may choose a different audio mode
-if the requested mode is invalid or unsupported. Since this is a
-<!-- FIXME -->write-only ioctl, it does not return the actually
-selected audio mode.</para>
-
- <para><link linkend="sdr">SDR</link> specific tuner types are
-<constant>V4L2_TUNER_SDR</constant> and <constant>V4L2_TUNER_RF</constant>.
-For SDR devices <structfield>audmode</structfield> field must be
-initialized to zero.
-The term 'tuner' means SDR receiver in this context.</para>
-
- <para>To change the radio frequency the &VIDIOC-S-FREQUENCY; ioctl
-is available.</para>
-
- <table pgwide="1" frame="none" id="v4l2-tuner">
- <title>struct <structname>v4l2_tuner</structname></title>
- <tgroup cols="3">
- <colspec colname="c1" colwidth="1*" />
- <colspec colname="c2" colwidth="1*" />
- <colspec colname="c3" colwidth="1*" />
- <colspec colname="c4" colwidth="1*" />
- <spanspec spanname="hspan" namest="c3" nameend="c4" />
- <tbody valign="top">
- <row>
- <entry>__u32</entry>
- <entry><structfield>index</structfield></entry>
- <entry spanname="hspan">Identifies the tuner, set by the
-application.</entry>
- </row>
- <row>
- <entry>__u8</entry>
- <entry><structfield>name</structfield>[32]</entry>
- <entry spanname="hspan"><para>Name of the tuner, a
-NUL-terminated ASCII string. This information is intended for the
-user.<!-- FIXME Video inputs already have a name, the purpose of this
-field is not quite clear.--></para></entry>
- </row>
- <row>
- <entry>__u32</entry>
- <entry><structfield>type</structfield></entry>
- <entry spanname="hspan">Type of the tuner, see <xref
- linkend="v4l2-tuner-type" />.</entry>
- </row>
- <row>
- <entry>__u32</entry>
- <entry><structfield>capability</structfield></entry>
- <entry spanname="hspan"><para>Tuner capability flags, see
-<xref linkend="tuner-capability" />. Audio flags indicate the ability
-to decode audio subprograms. They will <emphasis>not</emphasis>
-change, for example with the current video standard.</para><para>When
-the structure refers to a radio tuner the
-<constant>V4L2_TUNER_CAP_LANG1</constant>,
-<constant>V4L2_TUNER_CAP_LANG2</constant> and
-<constant>V4L2_TUNER_CAP_NORM</constant> flags can't be used.</para>
-<para>If multiple frequency bands are supported, then
-<structfield>capability</structfield> is the union of all
-<structfield>capability</structfield> fields of each &v4l2-frequency-band;.
-</para></entry>
- </row>
- <row>
- <entry>__u32</entry>
- <entry><structfield>rangelow</structfield></entry>
- <entry spanname="hspan">The lowest tunable frequency in
-units of 62.5 kHz, or if the <structfield>capability</structfield>
-flag <constant>V4L2_TUNER_CAP_LOW</constant> is set, in units of 62.5
-Hz, or if the <structfield>capability</structfield> flag
-<constant>V4L2_TUNER_CAP_1HZ</constant> is set, in units of 1 Hz.
-If multiple frequency bands are supported, then
-<structfield>rangelow</structfield> is the lowest frequency
-of all the frequency bands.</entry>
- </row>
- <row>
- <entry>__u32</entry>
- <entry><structfield>rangehigh</structfield></entry>
- <entry spanname="hspan">The highest tunable frequency in
-units of 62.5 kHz, or if the <structfield>capability</structfield>
-flag <constant>V4L2_TUNER_CAP_LOW</constant> is set, in units of 62.5
-Hz, or if the <structfield>capability</structfield> flag
-<constant>V4L2_TUNER_CAP_1HZ</constant> is set, in units of 1 Hz.
-If multiple frequency bands are supported, then
-<structfield>rangehigh</structfield> is the highest frequency
-of all the frequency bands.</entry>
- </row>
- <row>
- <entry>__u32</entry>
- <entry><structfield>rxsubchans</structfield></entry>
- <entry spanname="hspan"><para>Some tuners or audio
-decoders can determine the received audio subprograms by analyzing
-audio carriers, pilot tones or other indicators. To pass this
-information drivers set flags defined in <xref
- linkend="tuner-rxsubchans" /> in this field. For
-example:</para></entry>
- </row>
- <row>
- <entry></entry>
- <entry></entry>
- <entry><constant>V4L2_TUNER_SUB_MONO</constant></entry>
- <entry>receiving mono audio</entry>
- </row>
- <row>
- <entry></entry>
- <entry></entry>
- <entry><constant>STEREO | SAP</constant></entry>
- <entry>receiving stereo audio and a secondary audio
-program</entry>
- </row>
- <row>
- <entry></entry>
- <entry></entry>
- <entry><constant>MONO | STEREO</constant></entry>
- <entry>receiving mono or stereo audio, the hardware cannot
-distinguish</entry>
- </row>
- <row>
- <entry></entry>
- <entry></entry>
- <entry><constant>LANG1 | LANG2</constant></entry>
- <entry>receiving bilingual audio</entry>
- </row>
- <row>
- <entry></entry>
- <entry></entry>
- <entry><constant>MONO | STEREO | LANG1 | LANG2</constant></entry>
- <entry>receiving mono, stereo or bilingual
-audio</entry>
- </row>
- <row>
- <entry></entry>
- <entry></entry>
- <entry spanname="hspan"><para>When the
-<constant>V4L2_TUNER_CAP_STEREO</constant>,
-<constant>_LANG1</constant>, <constant>_LANG2</constant> or
-<constant>_SAP</constant> flag is cleared in the
-<structfield>capability</structfield> field, the corresponding
-<constant>V4L2_TUNER_SUB_</constant> flag must not be set
-here.</para><para>This field is valid only if this is the tuner of the
-current video input, or when the structure refers to a radio
-tuner.</para></entry>
- </row>
- <row>
- <entry>__u32</entry>
- <entry><structfield>audmode</structfield></entry>
- <entry spanname="hspan"><para>The selected audio mode, see
-<xref linkend="tuner-audmode" /> for valid values. The audio mode does
-not affect audio subprogram detection, and like a <link
-linkend="control">control</link> it does not automatically change
-unless the requested mode is invalid or unsupported. See <xref
- linkend="tuner-matrix" /> for possible results when
-the selected and received audio programs do not
-match.</para><para>Currently this is the only field of struct
-<structname>v4l2_tuner</structname> applications can
-change.</para></entry>
- </row>
- <row>
- <entry>__u32</entry>
- <entry><structfield>signal</structfield></entry>
- <entry spanname="hspan">The signal strength if known, ranging
-from 0 to 65535. Higher values indicate a better signal.</entry>
- </row>
- <row>
- <entry>__s32</entry>
- <entry><structfield>afc</structfield></entry>
- <entry spanname="hspan">Automatic frequency control: When the
-<structfield>afc</structfield> value is negative, the frequency is too
-low, when positive too high.<!-- FIXME need example what to do when it never
-settles at zero, &ie; range is what? --></entry>
- </row>
- <row>
- <entry>__u32</entry>
- <entry><structfield>reserved</structfield>[4]</entry>
- <entry spanname="hspan">Reserved for future extensions. Drivers and
-applications must set the array to zero.</entry>
- </row>
- </tbody>
- </tgroup>
- </table>
-
- <table pgwide="1" frame="none" id="v4l2-tuner-type">
- <title>enum v4l2_tuner_type</title>
- <tgroup cols="3">
- &cs-def;
- <tbody valign="top">
- <row>
- <entry><constant>V4L2_TUNER_RADIO</constant></entry>
- <entry>1</entry>
- <entry></entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_ANALOG_TV</constant></entry>
- <entry>2</entry>
- <entry></entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_SDR</constant></entry>
- <entry>4</entry>
- <entry></entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_RF</constant></entry>
- <entry>5</entry>
- <entry></entry>
- </row>
- </tbody>
- </tgroup>
- </table>
-
- <table pgwide="1" frame="none" id="tuner-capability">
- <title>Tuner and Modulator Capability Flags</title>
- <tgroup cols="3">
- &cs-def;
- <tbody valign="top">
- <row>
- <entry><constant>V4L2_TUNER_CAP_LOW</constant></entry>
- <entry>0x0001</entry>
- <entry>When set, tuning frequencies are expressed in units of
-62.5 Hz instead of 62.5 kHz.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_CAP_NORM</constant></entry>
- <entry>0x0002</entry>
- <entry>This is a multi-standard tuner; the video standard
-can or must be switched. (B/G PAL tuners for example are typically not
- considered multi-standard because the video standard is automatically
- determined from the frequency band.) The set of supported video
- standards is available from the &v4l2-input; pointing to this tuner,
- see the description of ioctl &VIDIOC-ENUMINPUT; for details. Only
- <constant>V4L2_TUNER_ANALOG_TV</constant> tuners can have this capability.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_CAP_HWSEEK_BOUNDED</constant></entry>
- <entry>0x0004</entry>
- <entry>If set, then this tuner supports the hardware seek functionality
- where the seek stops when it reaches the end of the frequency range.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_CAP_HWSEEK_WRAP</constant></entry>
- <entry>0x0008</entry>
- <entry>If set, then this tuner supports the hardware seek functionality
- where the seek wraps around when it reaches the end of the frequency range.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_CAP_STEREO</constant></entry>
- <entry>0x0010</entry>
- <entry>Stereo audio reception is supported.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_CAP_LANG1</constant></entry>
- <entry>0x0040</entry>
- <entry>Reception of the primary language of a bilingual
-audio program is supported. Bilingual audio is a feature of
-two-channel systems, transmitting the primary language monaural on the
-main audio carrier and a secondary language monaural on a second
-carrier. Only
- <constant>V4L2_TUNER_ANALOG_TV</constant> tuners can have this capability.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_CAP_LANG2</constant></entry>
- <entry>0x0020</entry>
- <entry>Reception of the secondary language of a bilingual
-audio program is supported. Only
- <constant>V4L2_TUNER_ANALOG_TV</constant> tuners can have this capability.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_CAP_SAP</constant></entry>
- <entry>0x0020</entry>
- <entry><para>Reception of a secondary audio program is
-supported. This is a feature of the BTSC system which accompanies the
-NTSC video standard. Two audio carriers are available for mono or
-stereo transmissions of a primary language, and an independent third
-carrier for a monaural secondary language. Only
- <constant>V4L2_TUNER_ANALOG_TV</constant> tuners can have this capability.</para><para>Note the
-<constant>V4L2_TUNER_CAP_LANG2</constant> and
-<constant>V4L2_TUNER_CAP_SAP</constant> flags are synonyms.
-<constant>V4L2_TUNER_CAP_SAP</constant> applies when the tuner
-supports the <constant>V4L2_STD_NTSC_M</constant> video
-standard.</para><!-- FIXME what if PAL+NTSC and Bi but not SAP? --></entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_CAP_RDS</constant></entry>
- <entry>0x0080</entry>
- <entry>RDS capture is supported. This capability is only valid for
-radio tuners.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_CAP_RDS_BLOCK_IO</constant></entry>
- <entry>0x0100</entry>
- <entry>The RDS data is passed as unparsed RDS blocks.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_CAP_RDS_CONTROLS</constant></entry>
- <entry>0x0200</entry>
- <entry>The RDS data is parsed by the hardware and set via controls.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_CAP_FREQ_BANDS</constant></entry>
- <entry>0x0400</entry>
- <entry>The &VIDIOC-ENUM-FREQ-BANDS; ioctl can be used to enumerate
- the available frequency bands.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_CAP_HWSEEK_PROG_LIM</constant></entry>
- <entry>0x0800</entry>
- <entry>The range to search when using the hardware seek functionality
- is programmable, see &VIDIOC-S-HW-FREQ-SEEK; for details.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_CAP_1HZ</constant></entry>
- <entry>0x1000</entry>
- <entry>When set, tuning frequencies are expressed in units of 1 Hz instead of 62.5 kHz.</entry>
- </row>
- </tbody>
- </tgroup>
- </table>
-
- <table pgwide="1" frame="none" id="tuner-rxsubchans">
- <title>Tuner Audio Reception Flags</title>
- <tgroup cols="3">
- &cs-def;
- <tbody valign="top">
- <row>
- <entry><constant>V4L2_TUNER_SUB_MONO</constant></entry>
- <entry>0x0001</entry>
- <entry>The tuner receives a mono audio signal.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_SUB_STEREO</constant></entry>
- <entry>0x0002</entry>
- <entry>The tuner receives a stereo audio signal.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_SUB_LANG1</constant></entry>
- <entry>0x0008</entry>
- <entry>The tuner receives the primary language of a
-bilingual audio signal. Drivers must clear this flag when the current
-video standard is <constant>V4L2_STD_NTSC_M</constant>.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_SUB_LANG2</constant></entry>
- <entry>0x0004</entry>
- <entry>The tuner receives the secondary language of a
-bilingual audio signal (or a second audio program).</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_SUB_SAP</constant></entry>
- <entry>0x0004</entry>
- <entry>The tuner receives a Second Audio Program. Note the
-<constant>V4L2_TUNER_SUB_LANG2</constant> and
-<constant>V4L2_TUNER_SUB_SAP</constant> flags are synonyms. The
-<constant>V4L2_TUNER_SUB_SAP</constant> flag applies when the
-current video standard is <constant>V4L2_STD_NTSC_M</constant>.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_SUB_RDS</constant></entry>
- <entry>0x0010</entry>
- <entry>The tuner receives an RDS channel.</entry>
- </row>
- </tbody>
- </tgroup>
- </table>
-
- <table pgwide="1" frame="none" id="tuner-audmode">
- <title>Tuner Audio Modes</title>
- <tgroup cols="3">
- &cs-def;
- <tbody valign="top">
- <row>
- <entry><constant>V4L2_TUNER_MODE_MONO</constant></entry>
- <entry>0</entry>
- <entry>Play mono audio. When the tuner receives a stereo
-signal this a down-mix of the left and right channel. When the tuner
-receives a bilingual or SAP signal this mode selects the primary
-language.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_MODE_STEREO</constant></entry>
- <entry>1</entry>
- <entry><para>Play stereo audio. When the tuner receives
-bilingual audio it may play different languages on the left and right
-channel or the primary language is played on both channels.</para><para>Playing
-different languages in this mode is
-deprecated. New drivers should do this only in
-<constant>MODE_LANG1_LANG2</constant>.</para><para>When the tuner
-receives no stereo signal or does not support stereo reception the
-driver shall fall back to <constant>MODE_MONO</constant>.</para></entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_MODE_LANG1</constant></entry>
- <entry>3</entry>
- <entry>Play the primary language, mono or stereo. Only
-<constant>V4L2_TUNER_ANALOG_TV</constant> tuners support this
-mode.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_MODE_LANG2</constant></entry>
- <entry>2</entry>
- <entry>Play the secondary language, mono. When the tuner
-receives no bilingual audio or SAP, or their reception is not
-supported the driver shall fall back to mono or stereo mode. Only
-<constant>V4L2_TUNER_ANALOG_TV</constant> tuners support this
-mode.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_MODE_SAP</constant></entry>
- <entry>2</entry>
- <entry>Play the Second Audio Program. When the tuner
-receives no bilingual audio or SAP, or their reception is not
-supported the driver shall fall back to mono or stereo mode. Only
-<constant>V4L2_TUNER_ANALOG_TV</constant> tuners support this mode.
-Note the <constant>V4L2_TUNER_MODE_LANG2</constant> and
-<constant>V4L2_TUNER_MODE_SAP</constant> are synonyms.</entry>
- </row>
- <row>
- <entry><constant>V4L2_TUNER_MODE_LANG1_LANG2</constant></entry>
- <entry>4</entry>
- <entry>Play the primary language on the left channel, the
-secondary language on the right channel. When the tuner receives no
-bilingual audio or SAP, it shall fall back to
-<constant>MODE_LANG1</constant> or <constant>MODE_MONO</constant>.
-Only <constant>V4L2_TUNER_ANALOG_TV</constant> tuners support this
-mode.</entry>
- </row>
- </tbody>
- </tgroup>
- </table>
-
- <table pgwide="1" frame="all" id="tuner-matrix">
- <title>Tuner Audio Matrix</title>
- <tgroup cols="6" align="center">
- <colspec align="left" />
- <colspec colname="c2" colwidth="1*" />
- <colspec colwidth="1*" />
- <colspec colwidth="1*" />
- <colspec colnum="6" colname="c6" colwidth="1*" />
- <spanspec namest="c2" nameend="c6" spanname="hspan" align="center" />
- <thead>
- <row>
- <entry></entry>
- <entry spanname="hspan">Selected
-<constant>V4L2_TUNER_MODE_</constant></entry>
- </row>
- <row>
- <entry>Received <constant>V4L2_TUNER_SUB_</constant></entry>
- <entry><constant>MONO</constant></entry>
- <entry><constant>STEREO</constant></entry>
- <entry><constant>LANG1</constant></entry>
- <entry><constant>LANG2 = SAP</constant></entry>
- <entry><constant>LANG1_LANG2</constant><footnote><para>This
-mode has been added in Linux 2.6.17 and may not be supported by older
-drivers.</para></footnote></entry>
- </row>
- </thead>
- <tbody valign="top">
- <row>
- <entry><constant>MONO</constant></entry>
- <entry>Mono</entry>
- <entry>Mono/Mono</entry>
- <entry>Mono</entry>
- <entry>Mono</entry>
- <entry>Mono/Mono</entry>
- </row>
- <row>
- <entry><constant>MONO | SAP</constant></entry>
- <entry>Mono</entry>
- <entry>Mono/Mono</entry>
- <entry>Mono</entry>
- <entry>SAP</entry>
- <entry>Mono/SAP (preferred) or Mono/Mono</entry>
- </row>
- <row>
- <entry><constant>STEREO</constant></entry>
- <entry>L+R</entry>
- <entry>L/R</entry>
- <entry>Stereo L/R (preferred) or Mono L+R</entry>
- <entry>Stereo L/R (preferred) or Mono L+R</entry>
- <entry>L/R (preferred) or L+R/L+R</entry>
- </row>
- <row>
- <entry><constant>STEREO | SAP</constant></entry>
- <entry>L+R</entry>
- <entry>L/R</entry>
- <entry>Stereo L/R (preferred) or Mono L+R</entry>
- <entry>SAP</entry>
- <entry>L+R/SAP (preferred) or L/R or L+R/L+R</entry>
- </row>
- <row>
- <entry><constant>LANG1 | LANG2</constant></entry>
- <entry>Language&nbsp;1</entry>
- <entry>Lang1/Lang2 (deprecated<footnote><para>Playback of
-both languages in <constant>MODE_STEREO</constant> is deprecated. In
-the future drivers should produce only the primary language in this
-mode. Applications should request
-<constant>MODE_LANG1_LANG2</constant> to record both languages or a
-stereo signal.</para></footnote>) or
-Lang1/Lang1</entry>
- <entry>Language&nbsp;1</entry>
- <entry>Language&nbsp;2</entry>
- <entry>Lang1/Lang2 (preferred) or Lang1/Lang1</entry>
- </row>
- </tbody>
- </tgroup>
- </table>
- </refsect1>
-
- <refsect1>
- &return-value;
-
- <variablelist>
- <varlistentry>
- <term><errorcode>EINVAL</errorcode></term>
- <listitem>
- <para>The &v4l2-tuner; <structfield>index</structfield> is
-out of bounds.</para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect1>
-</refentry>