Documentation/DocBook/media/v4l/vidioc-enumstd.xml - linux-mtk - Git at Google


            
            <refentry id="vidioc-enumstd">

            
              <refmeta>

            
                <refentrytitle>ioctl VIDIOC_ENUMSTD</refentrytitle>

            
                &manvol;

            
              </refmeta>


              <refnamediv>

            
                <refname>VIDIOC_ENUMSTD</refname>

            
                <refpurpose>Enumerate supported video standards</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_standard *<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_ENUMSTD</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 video standard,

            
            especially a custom (driver defined) one, applications initialize the

            
            <structfield>index</structfield> field of &v4l2-standard; and call the

            
            <constant>VIDIOC_ENUMSTD</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 standards

            
            applications shall begin  at index zero, incrementing by one until the

            
            driver returns <errorcode>EINVAL</errorcode>. Drivers may enumerate a

            
            different set of standards after switching the video input or

            
            output.<footnote>

            
            	<para>The supported standards may overlap and we need an

            
            unambiguous set to find the current standard returned by

            
            <constant>VIDIOC_G_STD</constant>.</para>

            
                  </footnote></para>


                <table pgwide="1" frame="none" id="v4l2-standard">

            
                  <title>struct <structname>v4l2_standard</structname></title>

            
                  <tgroup cols="3">

            
            	&cs-str;

            
            	<tbody valign="top">

            
            	  <row>

            
            	    <entry>__u32</entry>

            
            	    <entry><structfield>index</structfield></entry>

            
            	    <entry>Number of the video standard, set by the

            
            application.</entry>

            
            	  </row>

            
            	  <row>

            
            	    <entry>&v4l2-std-id;</entry>

            
            	    <entry><structfield>id</structfield></entry>

            
            	    <entry>The bits in this field identify the standard as

            
            one of the common standards listed in <xref linkend="v4l2-std-id" />,

            
            or if bits 32 to 63 are set as custom standards. Multiple bits can be

            
            set if the hardware does not distinguish between these standards,

            
            however separate indices do not indicate the opposite. The

            
            <structfield>id</structfield> must be unique. No other enumerated

            
            <structname>v4l2_standard</structname> structure, for this input or

            
            output anyway, can contain the same set of bits.</entry>

            
            	  </row>

            
            	  <row>

            
            	    <entry>__u8</entry>

            
            	    <entry><structfield>name</structfield>[24]</entry>

            
            	    <entry>Name of the standard, a NUL-terminated ASCII

            
            string, for example: "PAL-B/G", "NTSC Japan". This information is

            
            intended for the user.</entry>

            
            	  </row>

            
            	  <row>

            
            	    <entry>&v4l2-fract;</entry>

            
            	    <entry><structfield>frameperiod</structfield></entry>

            
            	    <entry>The frame period (not field period) is numerator

            
            / denominator. For example M/NTSC has a frame period of 1001 /

            
            30000 seconds.</entry>

            
            	  </row>

            
            	  <row>

            
            	    <entry>__u32</entry>

            
            	    <entry><structfield>framelines</structfield></entry>

            
            	    <entry>Total lines per frame including blanking,

            
            e.&nbsp;g. 625 for B/PAL.</entry>

            
            	  </row>

            
            	  <row>

            
            	    <entry>__u32</entry>

            
            	    <entry><structfield>reserved</structfield>[4]</entry>

            
            	    <entry>Reserved for future extensions. Drivers must set

            
            the array to zero.</entry>

            
            	  </row>

            
            	</tbody>

            
                  </tgroup>

            
                </table>


                <table pgwide="1" frame="none" id="v4l2-fract">

            
                  <title>struct <structname>v4l2_fract</structname></title>

            
                  <tgroup cols="3">

            
            	&cs-str;

            
            	<tbody valign="top">

            
            	  <row>

            
            	    <entry>__u32</entry>

            
            	    <entry><structfield>numerator</structfield></entry>

            
            	    <entry></entry>

            
            	  </row>

            
            	  <row>

            
            	    <entry>__u32</entry>

            
            	    <entry><structfield>denominator</structfield></entry>

            
            	    <entry></entry>

            
            	  </row>

            
            	</tbody>

            
                  </tgroup>

            
                </table>


                <table pgwide="1" frame="none" id="v4l2-std-id">

            
                  <title>typedef <structname>v4l2_std_id</structname></title>

            
                  <tgroup cols="3">

            
            	&cs-str;

            
            	<tbody valign="top">

            
            	  <row>

            
            	    <entry>__u64</entry>

            
            	    <entry><structfield>v4l2_std_id</structfield></entry>

            
            	    <entry>This type is a set, each bit representing another

            
            video standard as listed below and in <xref

            
            linkend="video-standards" />. The 32 most significant bits are reserved

            
            for custom (driver defined) video standards.</entry>

            
            	  </row>

            
            	</tbody>

            
                  </tgroup>

            
                </table>


                <para><programlisting>

            
            #define V4L2_STD_PAL_B          ((v4l2_std_id)0x00000001)

            
            #define V4L2_STD_PAL_B1         ((v4l2_std_id)0x00000002)

            
            #define V4L2_STD_PAL_G          ((v4l2_std_id)0x00000004)

            
            #define V4L2_STD_PAL_H          ((v4l2_std_id)0x00000008)

            
            #define V4L2_STD_PAL_I          ((v4l2_std_id)0x00000010)

            
            #define V4L2_STD_PAL_D          ((v4l2_std_id)0x00000020)

            
            #define V4L2_STD_PAL_D1         ((v4l2_std_id)0x00000040)

            
            #define V4L2_STD_PAL_K          ((v4l2_std_id)0x00000080)


            #define V4L2_STD_PAL_M          ((v4l2_std_id)0x00000100)

            
            #define V4L2_STD_PAL_N          ((v4l2_std_id)0x00000200)

            
            #define V4L2_STD_PAL_Nc         ((v4l2_std_id)0x00000400)

            
            #define V4L2_STD_PAL_60         ((v4l2_std_id)0x00000800)

            
            </programlisting></para><para><constant>V4L2_STD_PAL_60</constant> is

            
            a hybrid standard with 525 lines, 60 Hz refresh rate, and PAL color

            
            modulation with a 4.43 MHz color subcarrier. Some PAL video recorders

            
            can play back NTSC tapes in this mode for display on a 50/60 Hz agnostic

            
            PAL TV.</para><para><programlisting>

            
            #define V4L2_STD_NTSC_M         ((v4l2_std_id)0x00001000)

            
            #define V4L2_STD_NTSC_M_JP      ((v4l2_std_id)0x00002000)

            
            #define V4L2_STD_NTSC_443       ((v4l2_std_id)0x00004000)

            
            </programlisting></para><para><constant>V4L2_STD_NTSC_443</constant>

            
            is a hybrid standard with 525 lines, 60 Hz refresh rate, and NTSC

            
            color modulation with a 4.43 MHz color

            
            subcarrier.</para><para><programlisting>

            
            #define V4L2_STD_NTSC_M_KR      ((v4l2_std_id)0x00008000)


            #define V4L2_STD_SECAM_B        ((v4l2_std_id)0x00010000)

            
            #define V4L2_STD_SECAM_D        ((v4l2_std_id)0x00020000)

            
            #define V4L2_STD_SECAM_G        ((v4l2_std_id)0x00040000)

            
            #define V4L2_STD_SECAM_H        ((v4l2_std_id)0x00080000)

            
            #define V4L2_STD_SECAM_K        ((v4l2_std_id)0x00100000)

            
            #define V4L2_STD_SECAM_K1       ((v4l2_std_id)0x00200000)

            
            #define V4L2_STD_SECAM_L        ((v4l2_std_id)0x00400000)

            
            #define V4L2_STD_SECAM_LC       ((v4l2_std_id)0x00800000)


            /* ATSC/HDTV */

            
            #define V4L2_STD_ATSC_8_VSB     ((v4l2_std_id)0x01000000)

            
            #define V4L2_STD_ATSC_16_VSB    ((v4l2_std_id)0x02000000)

            
            </programlisting></para><para><!-- ATSC proposal by Mark McClelland,

            
            video4linux-list@redhat.com on 17 Oct 2002

            
            --><constant>V4L2_STD_ATSC_8_VSB</constant> and

            
            <constant>V4L2_STD_ATSC_16_VSB</constant> are U.S. terrestrial digital

            
            TV standards. Presently the V4L2 API does not support digital TV. See

            
            also the Linux DVB API at <ulink

            
            url="http://linuxtv.org">http://linuxtv.org</ulink>.</para>

            
            <para><programlisting>

            
            #define V4L2_STD_PAL_BG         (V4L2_STD_PAL_B         |\

            
            				 V4L2_STD_PAL_B1        |\

            
            				 V4L2_STD_PAL_G)

            
            #define V4L2_STD_B              (V4L2_STD_PAL_B         |\

            
            				 V4L2_STD_PAL_B1        |\

            
            				 V4L2_STD_SECAM_B)

            
            #define V4L2_STD_GH             (V4L2_STD_PAL_G         |\

            
            				 V4L2_STD_PAL_H         |\

            
            				 V4L2_STD_SECAM_G       |\

            
            				 V4L2_STD_SECAM_H)

            
            #define V4L2_STD_PAL_DK         (V4L2_STD_PAL_D         |\

            
            				 V4L2_STD_PAL_D1        |\

            
            				 V4L2_STD_PAL_K)

            
            #define V4L2_STD_PAL            (V4L2_STD_PAL_BG        |\

            
            				 V4L2_STD_PAL_DK        |\

            
            				 V4L2_STD_PAL_H         |\

            
            				 V4L2_STD_PAL_I)

            
            #define V4L2_STD_NTSC           (V4L2_STD_NTSC_M        |\

            
            				 V4L2_STD_NTSC_M_JP     |\

            
            				 V4L2_STD_NTSC_M_KR)

            
            #define V4L2_STD_MN             (V4L2_STD_PAL_M         |\

            
            				 V4L2_STD_PAL_N         |\

            
            				 V4L2_STD_PAL_Nc        |\

            
            				 V4L2_STD_NTSC)

            
            #define V4L2_STD_SECAM_DK       (V4L2_STD_SECAM_D       |\

            
            				 V4L2_STD_SECAM_K       |\

            
            				 V4L2_STD_SECAM_K1)

            
            #define V4L2_STD_DK             (V4L2_STD_PAL_DK        |\

            
            				 V4L2_STD_SECAM_DK)


            #define V4L2_STD_SECAM          (V4L2_STD_SECAM_B       |\

            
            				 V4L2_STD_SECAM_G       |\

            
            				 V4L2_STD_SECAM_H       |\

            
            				 V4L2_STD_SECAM_DK      |\

            
            				 V4L2_STD_SECAM_L       |\

            
            				 V4L2_STD_SECAM_LC)


            #define V4L2_STD_525_60         (V4L2_STD_PAL_M         |\

            
            				 V4L2_STD_PAL_60        |\

            
            				 V4L2_STD_NTSC          |\

            
            				 V4L2_STD_NTSC_443)

            
            #define V4L2_STD_625_50         (V4L2_STD_PAL           |\

            
            				 V4L2_STD_PAL_N         |\

            
            				 V4L2_STD_PAL_Nc        |\

            
            				 V4L2_STD_SECAM)


            #define V4L2_STD_UNKNOWN        0

            
            #define V4L2_STD_ALL            (V4L2_STD_525_60        |\

            
            				 V4L2_STD_625_50)

            
            </programlisting></para>


                <table pgwide="1" id="video-standards" orient="land">

            
                  <title>Video Standards (based on [<xref linkend="itu470" />])</title>

            
                  <tgroup cols="12" colsep="1" rowsep="1" align="center">

            
            	<colspec colname="c1" align="left" />

            
            	<colspec colname="c2" />

            
            	<colspec colname="c3" />

            
            	<colspec colname="c4" />

            
            	<colspec colname="c5" />

            
            	<colspec colnum="7" colname="c7" />

            
            	<colspec colnum="9" colname="c9" />

            
            	<colspec colnum="12" colname="c12" />

            
            	<spanspec namest="c2" nameend="c3" spanname="m" align="center" />

            
            	<spanspec namest="c4" nameend="c12" spanname="x" align="center" />

            
            	<spanspec namest="c5" nameend="c7" spanname="b" align="center" />

            
            	<spanspec namest="c9" nameend="c12" spanname="s" align="center" />

            
            	<thead>

            
            	  <row>

            
            	    <entry>Characteristics</entry>

            
            	    <entry><para>M/NTSC<footnote><para>Japan uses a standard

            
            similar to M/NTSC

            
            (V4L2_STD_NTSC_M_JP).</para></footnote></para></entry>

            
            	    <entry>M/PAL</entry>

            
            	    <entry><para>N/PAL<footnote><para> The values in

            
            brackets apply to the combination N/PAL a.k.a.

            
            N<subscript>C</subscript> used in Argentina

            
            (V4L2_STD_PAL_Nc).</para></footnote></para></entry>

            
            	    <entry align="center">B, B1, G/PAL</entry>

            
            	    <entry align="center">D, D1, K/PAL</entry>

            
            	    <entry align="center">H/PAL</entry>

            
            	    <entry align="center">I/PAL</entry>

            
            	    <entry align="center">B, G/SECAM</entry>

            
            	    <entry align="center">D, K/SECAM</entry>

            
            	    <entry align="center">K1/SECAM</entry>

            
            	    <entry align="center">L/SECAM</entry>

            
            	  </row>

            
            	</thead>

            
            	<tbody valign="top">

            
            	  <row>

            
            	    <entry>Frame lines</entry>

            
            	    <entry spanname="m">525</entry>

            
            	    <entry spanname="x">625</entry>

            
            	  </row>

            
            	  <row>

            
            	    <entry>Frame period (s)</entry>

            
            	    <entry spanname="m">1001/30000</entry>

            
            	    <entry spanname="x">1/25</entry>

            
            	  </row>

            
            	  <row>

            
            	    <entry>Chrominance sub-carrier frequency (Hz)</entry>

            
            	    <entry>3579545 &plusmn;&nbsp;10</entry>

            
            	    <entry>3579611.49 &plusmn;&nbsp;10</entry>

            
            	    <entry>4433618.75 &plusmn;&nbsp;5 (3582056.25

            
            &plusmn;&nbsp;5)</entry>

            
            	    <entry spanname="b">4433618.75 &plusmn;&nbsp;5</entry>

            
            	    <entry>4433618.75 &plusmn;&nbsp;1</entry>

            
            	    <entry spanname="s">f<subscript>OR</subscript>&nbsp;=

            
            4406250 &plusmn;&nbsp;2000, f<subscript>OB</subscript>&nbsp;= 4250000

            
            &plusmn;&nbsp;2000</entry>

            
            	  </row>

            
            	  <row>

            
            	    <entry>Nominal radio-frequency channel bandwidth

            
            (MHz)</entry>

            
            	    <entry>6</entry>

            
            	    <entry>6</entry>

            
            	    <entry>6</entry>

            
            	    <entry>B: 7; B1, G: 8</entry>

            
            	    <entry>8</entry>

            
            	    <entry>8</entry>

            
            	    <entry>8</entry>

            
            	    <entry>8</entry>

            
            	    <entry>8</entry>

            
            	    <entry>8</entry>

            
            	    <entry>8</entry>

            
            	  </row>

            
            	  <row>

            
            	    <entry>Sound carrier relative to vision carrier

            
            (MHz)</entry>

            
            	    <entry>+&nbsp;4.5</entry>

            
            	    <entry>+&nbsp;4.5</entry>

            
            	    <entry>+&nbsp;4.5</entry>

            
            	    <entry><para>+&nbsp;5.5 &plusmn;&nbsp;0.001

            
            <footnote><para>In the Federal Republic of Germany, Austria, Italy,

            
            the Netherlands, Slovakia and Switzerland a system of two sound

            
            carriers is used, the frequency of the second carrier being

            
            242.1875&nbsp;kHz above the frequency of the first sound carrier. For

            
            stereophonic sound transmissions a similar system is used in

            
            Australia.</para></footnote> <footnote><para>New Zealand uses a sound

            
            carrier displaced 5.4996 &plusmn;&nbsp;0.0005 MHz from the vision

            
            carrier.</para></footnote> <footnote><para>In Denmark, Finland, New

            
            Zealand, Sweden and Spain a system of two sound carriers is used. In

            
            Iceland, Norway and Poland the same system is being introduced. The

            
            second carrier is 5.85&nbsp;MHz above the vision carrier and is DQPSK

            
            modulated with 728&nbsp;kbit/s sound and data multiplex. (NICAM

            
            system)</para></footnote> <footnote><para>In the United Kingdom, a

            
            system of two sound carriers is used. The second sound carrier is

            
            6.552&nbsp;MHz above the vision carrier and is DQPSK modulated with a

            
            728&nbsp;kbit/s sound and data multiplex able to carry two sound

            
            channels. (NICAM system)</para></footnote></para></entry>

            
            	    <entry>+&nbsp;6.5 &plusmn;&nbsp;0.001</entry>

            
            	    <entry>+&nbsp;5.5</entry>

            
            	    <entry>+&nbsp;5.9996 &plusmn;&nbsp;0.0005</entry>

            
            	    <entry>+&nbsp;5.5 &plusmn;&nbsp;0.001</entry>

            
            	    <entry>+&nbsp;6.5 &plusmn;&nbsp;0.001</entry>

            
            	    <entry>+&nbsp;6.5</entry>

            
            	    <entry><para>+&nbsp;6.5 <footnote><para>In France, a

            
            digital carrier 5.85 MHz away from the vision carrier may be used in

            
            addition to the main sound carrier. It is modulated in differentially

            
            encoded QPSK with a 728 kbit/s sound and data multiplexer capable of

            
            carrying two sound channels. (NICAM

            
            system)</para></footnote></para></entry>

            
            	  </row>

            
            	</tbody>

            
                  </tgroup>

            
                </table>

            
              </refsect1>


              <refsect1>

            
                &return-value;


                <variablelist>

            
                  <varlistentry>

            
            	<term><errorcode>EINVAL</errorcode></term>

            
            	<listitem>

            
            	  <para>The &v4l2-standard; <structfield>index</structfield>

            
            is out of bounds.</para>

            
            	</listitem>

            
                  </varlistentry>

            
                  <varlistentry>

            
            	<term><errorcode>ENODATA</errorcode></term>

            
            	<listitem>

            
            	  <para>Standard video timings are not supported for this input or output.</para>

            
            	</listitem>

            
                  </varlistentry>

            
                </variablelist>

            
              </refsect1>

            
            </refentry>
	<refentry id="vidioc-enumstd">
	<refmeta>
	<refentrytitle>ioctl VIDIOC_ENUMSTD</refentrytitle>
	&manvol;
	</refmeta>

	<refnamediv>
	<refname>VIDIOC_ENUMSTD</refname>
	<refpurpose>Enumerate supported video standards</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_standard *<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_ENUMSTD</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 video standard,
	especially a custom (driver defined) one, applications initialize the
	<structfield>index</structfield> field of &v4l2-standard; and call the
	<constant>VIDIOC_ENUMSTD</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 standards
	applications shall begin at index zero, incrementing by one until the
	driver returns <errorcode>EINVAL</errorcode>. Drivers may enumerate a
	different set of standards after switching the video input or
	output.<footnote>
	<para>The supported standards may overlap and we need an
	unambiguous set to find the current standard returned by
	<constant>VIDIOC_G_STD</constant>.</para>
	</footnote></para>

	<table pgwide="1" frame="none" id="v4l2-standard">
	<title>struct <structname>v4l2_standard</structname></title>
	<tgroup cols="3">
	&cs-str;
	<tbody valign="top">
	<row>
	<entry>__u32</entry>
	<entry><structfield>index</structfield></entry>
	<entry>Number of the video standard, set by the
	application.</entry>
	</row>
	<row>
	<entry>&v4l2-std-id;</entry>
	<entry><structfield>id</structfield></entry>
	<entry>The bits in this field identify the standard as
	one of the common standards listed in <xref linkend="v4l2-std-id" />,
	or if bits 32 to 63 are set as custom standards. Multiple bits can be
	set if the hardware does not distinguish between these standards,
	however separate indices do not indicate the opposite. The
	<structfield>id</structfield> must be unique. No other enumerated
	<structname>v4l2_standard</structname> structure, for this input or
	output anyway, can contain the same set of bits.</entry>
	</row>
	<row>
	<entry>__u8</entry>
	<entry><structfield>name</structfield>[24]</entry>
	<entry>Name of the standard, a NUL-terminated ASCII
	string, for example: "PAL-B/G", "NTSC Japan". This information is
	intended for the user.</entry>
	</row>
	<row>
	<entry>&v4l2-fract;</entry>
	<entry><structfield>frameperiod</structfield></entry>
	<entry>The frame period (not field period) is numerator
	/ denominator. For example M/NTSC has a frame period of 1001 /
	30000 seconds.</entry>
	</row>
	<row>
	<entry>__u32</entry>
	<entry><structfield>framelines</structfield></entry>
	<entry>Total lines per frame including blanking,
	e. g. 625 for B/PAL.</entry>
	</row>
	<row>
	<entry>__u32</entry>
	<entry><structfield>reserved</structfield>[4]</entry>
	<entry>Reserved for future extensions. Drivers must set
	the array to zero.</entry>
	</row>
	</tbody>
	</tgroup>
	</table>

	<table pgwide="1" frame="none" id="v4l2-fract">
	<title>struct <structname>v4l2_fract</structname></title>
	<tgroup cols="3">
	&cs-str;
	<tbody valign="top">
	<row>
	<entry>__u32</entry>
	<entry><structfield>numerator</structfield></entry>
	<entry></entry>
	</row>
	<row>
	<entry>__u32</entry>
	<entry><structfield>denominator</structfield></entry>
	<entry></entry>
	</row>
	</tbody>
	</tgroup>
	</table>

	<table pgwide="1" frame="none" id="v4l2-std-id">
	<title>typedef <structname>v4l2_std_id</structname></title>
	<tgroup cols="3">
	&cs-str;
	<tbody valign="top">
	<row>
	<entry>__u64</entry>
	<entry><structfield>v4l2_std_id</structfield></entry>
	<entry>This type is a set, each bit representing another
	video standard as listed below and in <xref
	linkend="video-standards" />. The 32 most significant bits are reserved
	for custom (driver defined) video standards.</entry>
	</row>
	</tbody>
	</tgroup>
	</table>

	<para><programlisting>
	#define V4L2_STD_PAL_B ((v4l2_std_id)0x00000001)
	#define V4L2_STD_PAL_B1 ((v4l2_std_id)0x00000002)
	#define V4L2_STD_PAL_G ((v4l2_std_id)0x00000004)
	#define V4L2_STD_PAL_H ((v4l2_std_id)0x00000008)
	#define V4L2_STD_PAL_I ((v4l2_std_id)0x00000010)
	#define V4L2_STD_PAL_D ((v4l2_std_id)0x00000020)
	#define V4L2_STD_PAL_D1 ((v4l2_std_id)0x00000040)
	#define V4L2_STD_PAL_K ((v4l2_std_id)0x00000080)

	#define V4L2_STD_PAL_M ((v4l2_std_id)0x00000100)
	#define V4L2_STD_PAL_N ((v4l2_std_id)0x00000200)
	#define V4L2_STD_PAL_Nc ((v4l2_std_id)0x00000400)
	#define V4L2_STD_PAL_60 ((v4l2_std_id)0x00000800)
	</programlisting></para><para><constant>V4L2_STD_PAL_60</constant> is
	a hybrid standard with 525 lines, 60 Hz refresh rate, and PAL color
	modulation with a 4.43 MHz color subcarrier. Some PAL video recorders
	can play back NTSC tapes in this mode for display on a 50/60 Hz agnostic
	PAL TV.</para><para><programlisting>
	#define V4L2_STD_NTSC_M ((v4l2_std_id)0x00001000)
	#define V4L2_STD_NTSC_M_JP ((v4l2_std_id)0x00002000)
	#define V4L2_STD_NTSC_443 ((v4l2_std_id)0x00004000)
	</programlisting></para><para><constant>V4L2_STD_NTSC_443</constant>
	is a hybrid standard with 525 lines, 60 Hz refresh rate, and NTSC
	color modulation with a 4.43 MHz color
	subcarrier.</para><para><programlisting>
	#define V4L2_STD_NTSC_M_KR ((v4l2_std_id)0x00008000)

	#define V4L2_STD_SECAM_B ((v4l2_std_id)0x00010000)
	#define V4L2_STD_SECAM_D ((v4l2_std_id)0x00020000)
	#define V4L2_STD_SECAM_G ((v4l2_std_id)0x00040000)
	#define V4L2_STD_SECAM_H ((v4l2_std_id)0x00080000)
	#define V4L2_STD_SECAM_K ((v4l2_std_id)0x00100000)
	#define V4L2_STD_SECAM_K1 ((v4l2_std_id)0x00200000)
	#define V4L2_STD_SECAM_L ((v4l2_std_id)0x00400000)
	#define V4L2_STD_SECAM_LC ((v4l2_std_id)0x00800000)

	/* ATSC/HDTV */
	#define V4L2_STD_ATSC_8_VSB ((v4l2_std_id)0x01000000)
	#define V4L2_STD_ATSC_16_VSB ((v4l2_std_id)0x02000000)
	</programlisting></para><para><!-- ATSC proposal by Mark McClelland,
	video4linux-list@redhat.com on 17 Oct 2002
	--><constant>V4L2_STD_ATSC_8_VSB</constant> and
	<constant>V4L2_STD_ATSC_16_VSB</constant> are U.S. terrestrial digital
	TV standards. Presently the V4L2 API does not support digital TV. See
	also the Linux DVB API at <ulink
	url="http://linuxtv.org">http://linuxtv.org</ulink>.</para>
	<para><programlisting>
	#define V4L2_STD_PAL_BG (V4L2_STD_PAL_B \|\
	V4L2_STD_PAL_B1 \|\
	V4L2_STD_PAL_G)
	#define V4L2_STD_B (V4L2_STD_PAL_B \|\
	V4L2_STD_PAL_B1 \|\
	V4L2_STD_SECAM_B)
	#define V4L2_STD_GH (V4L2_STD_PAL_G \|\
	V4L2_STD_PAL_H \|\
	V4L2_STD_SECAM_G \|\
	V4L2_STD_SECAM_H)
	#define V4L2_STD_PAL_DK (V4L2_STD_PAL_D \|\
	V4L2_STD_PAL_D1 \|\
	V4L2_STD_PAL_K)
	#define V4L2_STD_PAL (V4L2_STD_PAL_BG \|\
	V4L2_STD_PAL_DK \|\
	V4L2_STD_PAL_H \|\
	V4L2_STD_PAL_I)
	#define V4L2_STD_NTSC (V4L2_STD_NTSC_M \|\
	V4L2_STD_NTSC_M_JP \|\
	V4L2_STD_NTSC_M_KR)
	#define V4L2_STD_MN (V4L2_STD_PAL_M \|\
	V4L2_STD_PAL_N \|\
	V4L2_STD_PAL_Nc \|\
	V4L2_STD_NTSC)
	#define V4L2_STD_SECAM_DK (V4L2_STD_SECAM_D \|\
	V4L2_STD_SECAM_K \|\
	V4L2_STD_SECAM_K1)
	#define V4L2_STD_DK (V4L2_STD_PAL_DK \|\
	V4L2_STD_SECAM_DK)

	#define V4L2_STD_SECAM (V4L2_STD_SECAM_B \|\
	V4L2_STD_SECAM_G \|\
	V4L2_STD_SECAM_H \|\
	V4L2_STD_SECAM_DK \|\
	V4L2_STD_SECAM_L \|\
	V4L2_STD_SECAM_LC)

	#define V4L2_STD_525_60 (V4L2_STD_PAL_M \|\
	V4L2_STD_PAL_60 \|\
	V4L2_STD_NTSC \|\
	V4L2_STD_NTSC_443)
	#define V4L2_STD_625_50 (V4L2_STD_PAL \|\
	V4L2_STD_PAL_N \|\
	V4L2_STD_PAL_Nc \|\
	V4L2_STD_SECAM)

	#define V4L2_STD_UNKNOWN 0
	#define V4L2_STD_ALL (V4L2_STD_525_60 \|\
	V4L2_STD_625_50)
	</programlisting></para>

	<table pgwide="1" id="video-standards" orient="land">
	<title>Video Standards (based on [<xref linkend="itu470" />])</title>
	<tgroup cols="12" colsep="1" rowsep="1" align="center">
	<colspec colname="c1" align="left" />
	<colspec colname="c2" />
	<colspec colname="c3" />
	<colspec colname="c4" />
	<colspec colname="c5" />
	<colspec colnum="7" colname="c7" />
	<colspec colnum="9" colname="c9" />
	<colspec colnum="12" colname="c12" />
	<spanspec namest="c2" nameend="c3" spanname="m" align="center" />
	<spanspec namest="c4" nameend="c12" spanname="x" align="center" />
	<spanspec namest="c5" nameend="c7" spanname="b" align="center" />
	<spanspec namest="c9" nameend="c12" spanname="s" align="center" />
	<thead>
	<row>
	<entry>Characteristics</entry>
	<entry><para>M/NTSC<footnote><para>Japan uses a standard
	similar to M/NTSC
	(V4L2_STD_NTSC_M_JP).</para></footnote></para></entry>
	<entry>M/PAL</entry>
	<entry><para>N/PAL<footnote><para> The values in
	brackets apply to the combination N/PAL a.k.a.
	N<subscript>C</subscript> used in Argentina
	(V4L2_STD_PAL_Nc).</para></footnote></para></entry>
	<entry align="center">B, B1, G/PAL</entry>
	<entry align="center">D, D1, K/PAL</entry>
	<entry align="center">H/PAL</entry>
	<entry align="center">I/PAL</entry>
	<entry align="center">B, G/SECAM</entry>
	<entry align="center">D, K/SECAM</entry>
	<entry align="center">K1/SECAM</entry>
	<entry align="center">L/SECAM</entry>
	</row>
	</thead>
	<tbody valign="top">
	<row>
	<entry>Frame lines</entry>
	<entry spanname="m">525</entry>
	<entry spanname="x">625</entry>
	</row>
	<row>
	<entry>Frame period (s)</entry>
	<entry spanname="m">1001/30000</entry>
	<entry spanname="x">1/25</entry>
	</row>
	<row>
	<entry>Chrominance sub-carrier frequency (Hz)</entry>
	<entry>3579545 ± 10</entry>
	<entry>3579611.49 ± 10</entry>
	<entry>4433618.75 ± 5 (3582056.25
	± 5)</entry>
	<entry spanname="b">4433618.75 ± 5</entry>
	<entry>4433618.75 ± 1</entry>
	<entry spanname="s">f<subscript>OR</subscript> =
	4406250 ± 2000, f<subscript>OB</subscript> = 4250000
	± 2000</entry>
	</row>
	<row>
	<entry>Nominal radio-frequency channel bandwidth
	(MHz)</entry>
	<entry>6</entry>
	<entry>6</entry>
	<entry>6</entry>
	<entry>B: 7; B1, G: 8</entry>
	<entry>8</entry>
	<entry>8</entry>
	<entry>8</entry>
	<entry>8</entry>
	<entry>8</entry>
	<entry>8</entry>
	<entry>8</entry>
	</row>
	<row>
	<entry>Sound carrier relative to vision carrier
	(MHz)</entry>
	<entry>+ 4.5</entry>
	<entry>+ 4.5</entry>
	<entry>+ 4.5</entry>
	<entry><para>+ 5.5 ± 0.001
	<footnote><para>In the Federal Republic of Germany, Austria, Italy,
	the Netherlands, Slovakia and Switzerland a system of two sound
	carriers is used, the frequency of the second carrier being
	242.1875 kHz above the frequency of the first sound carrier. For
	stereophonic sound transmissions a similar system is used in
	Australia.</para></footnote> <footnote><para>New Zealand uses a sound
	carrier displaced 5.4996 ± 0.0005 MHz from the vision
	carrier.</para></footnote> <footnote><para>In Denmark, Finland, New
	Zealand, Sweden and Spain a system of two sound carriers is used. In
	Iceland, Norway and Poland the same system is being introduced. The
	second carrier is 5.85 MHz above the vision carrier and is DQPSK
	modulated with 728 kbit/s sound and data multiplex. (NICAM
	system)</para></footnote> <footnote><para>In the United Kingdom, a
	system of two sound carriers is used. The second sound carrier is
	6.552 MHz above the vision carrier and is DQPSK modulated with a
	728 kbit/s sound and data multiplex able to carry two sound
	channels. (NICAM system)</para></footnote></para></entry>
	<entry>+ 6.5 ± 0.001</entry>
	<entry>+ 5.5</entry>
	<entry>+ 5.9996 ± 0.0005</entry>
	<entry>+ 5.5 ± 0.001</entry>
	<entry>+ 6.5 ± 0.001</entry>
	<entry>+ 6.5</entry>
	<entry><para>+ 6.5 <footnote><para>In France, a
	digital carrier 5.85 MHz away from the vision carrier may be used in
	addition to the main sound carrier. It is modulated in differentially
	encoded QPSK with a 728 kbit/s sound and data multiplexer capable of
	carrying two sound channels. (NICAM
	system)</para></footnote></para></entry>
	</row>
	</tbody>
	</tgroup>
	</table>
	</refsect1>

	<refsect1>
	&return-value;

	<variablelist>
	<varlistentry>
	<term><errorcode>EINVAL</errorcode></term>
	<listitem>
	<para>The &v4l2-standard; <structfield>index</structfield>
	is out of bounds.</para>
	</listitem>
	</varlistentry>
	<varlistentry>
	<term><errorcode>ENODATA</errorcode></term>
	<listitem>
	<para>Standard video timings are not supported for this input or output.</para>
	</listitem>
	</varlistentry>
	</variablelist>
	</refsect1>
	</refentry>