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V4L/DVB (13572): v4l2-spec: Digital Video Timings API documentation
This patch updates the v4l2-dvb documentation for the new video timings API added. Also updated the document based on comments from Hans Verkuil. Signed-off-by: Muralidharan Karicheri <m-karicheri2@ti.com> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Muralidharan Karicheri
Mauro Carvalho Chehab
parent
b6456c0cfe
commit
007701e2c4
11 changed files with 903 additions and 4 deletions
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@ -23,6 +23,7 @@
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<!ENTITY VIDIOC-ENUMINPUT "<link linkend='vidioc-enuminput'><constant>VIDIOC_ENUMINPUT</constant></link>">
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<!ENTITY VIDIOC-ENUMOUTPUT "<link linkend='vidioc-enumoutput'><constant>VIDIOC_ENUMOUTPUT</constant></link>">
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<!ENTITY VIDIOC-ENUMSTD "<link linkend='vidioc-enumstd'><constant>VIDIOC_ENUMSTD</constant></link>">
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<!ENTITY VIDIOC-ENUM-DV-PRESETS "<link linkend='vidioc-enum-dv-presets'><constant>VIDIOC_ENUM_DV_PRESETS</constant></link>">
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<!ENTITY VIDIOC-ENUM-FMT "<link linkend='vidioc-enum-fmt'><constant>VIDIOC_ENUM_FMT</constant></link>">
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<!ENTITY VIDIOC-ENUM-FRAMEINTERVALS "<link linkend='vidioc-enum-frameintervals'><constant>VIDIOC_ENUM_FRAMEINTERVALS</constant></link>">
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<!ENTITY VIDIOC-ENUM-FRAMESIZES "<link linkend='vidioc-enum-framesizes'><constant>VIDIOC_ENUM_FRAMESIZES</constant></link>">
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@ -30,6 +31,8 @@
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<!ENTITY VIDIOC-G-AUDOUT "<link linkend='vidioc-g-audioout'><constant>VIDIOC_G_AUDOUT</constant></link>">
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<!ENTITY VIDIOC-G-CROP "<link linkend='vidioc-g-crop'><constant>VIDIOC_G_CROP</constant></link>">
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<!ENTITY VIDIOC-G-CTRL "<link linkend='vidioc-g-ctrl'><constant>VIDIOC_G_CTRL</constant></link>">
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<!ENTITY VIDIOC-G-DV-PRESET "<link linkend='vidioc-g-dv-preset'><constant>VIDIOC_G_DV_PRESET</constant></link>">
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<!ENTITY VIDIOC-G-DV-TIMINGS "<link linkend='vidioc-g-dv-timings'><constant>VIDIOC_G_DV_TIMINGS</constant></link>">
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<!ENTITY VIDIOC-G-ENC-INDEX "<link linkend='vidioc-g-enc-index'><constant>VIDIOC_G_ENC_INDEX</constant></link>">
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<!ENTITY VIDIOC-G-EXT-CTRLS "<link linkend='vidioc-g-ext-ctrls'><constant>VIDIOC_G_EXT_CTRLS</constant></link>">
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<!ENTITY VIDIOC-G-FBUF "<link linkend='vidioc-g-fbuf'><constant>VIDIOC_G_FBUF</constant></link>">
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@ -53,6 +56,7 @@
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<!ENTITY VIDIOC-QUERYCTRL "<link linkend='vidioc-queryctrl'><constant>VIDIOC_QUERYCTRL</constant></link>">
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<!ENTITY VIDIOC-QUERYMENU "<link linkend='vidioc-queryctrl'><constant>VIDIOC_QUERYMENU</constant></link>">
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<!ENTITY VIDIOC-QUERYSTD "<link linkend='vidioc-querystd'><constant>VIDIOC_QUERYSTD</constant></link>">
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<!ENTITY VIDIOC-QUERY-DV-PRESET "<link linkend='vidioc-query-dv-preset'><constant>VIDIOC_QUERY_DV_PRESET</constant></link>">
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<!ENTITY VIDIOC-REQBUFS "<link linkend='vidioc-reqbufs'><constant>VIDIOC_REQBUFS</constant></link>">
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<!ENTITY VIDIOC-STREAMOFF "<link linkend='vidioc-streamon'><constant>VIDIOC_STREAMOFF</constant></link>">
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<!ENTITY VIDIOC-STREAMON "<link linkend='vidioc-streamon'><constant>VIDIOC_STREAMON</constant></link>">
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@ -60,6 +64,8 @@
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<!ENTITY VIDIOC-S-AUDOUT "<link linkend='vidioc-g-audioout'><constant>VIDIOC_S_AUDOUT</constant></link>">
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<!ENTITY VIDIOC-S-CROP "<link linkend='vidioc-g-crop'><constant>VIDIOC_S_CROP</constant></link>">
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<!ENTITY VIDIOC-S-CTRL "<link linkend='vidioc-g-ctrl'><constant>VIDIOC_S_CTRL</constant></link>">
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<!ENTITY VIDIOC-S-DV-PRESET "<link linkend='vidioc-g-dv-preset'><constant>VIDIOC_S_DV_PRESET</constant></link>">
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<!ENTITY VIDIOC-S-DV-TIMINGS "<link linkend='vidioc-g-dv-timings'><constant>VIDIOC_S_DV_TIMINGS</constant></link>">
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<!ENTITY VIDIOC-S-EXT-CTRLS "<link linkend='vidioc-g-ext-ctrls'><constant>VIDIOC_S_EXT_CTRLS</constant></link>">
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<!ENTITY VIDIOC-S-FBUF "<link linkend='vidioc-g-fbuf'><constant>VIDIOC_S_FBUF</constant></link>">
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<!ENTITY VIDIOC-S-FMT "<link linkend='vidioc-g-fmt'><constant>VIDIOC_S_FMT</constant></link>">
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@ -118,6 +124,7 @@
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<!-- Structures -->
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<!ENTITY v4l2-audio "struct <link linkend='v4l2-audio'>v4l2_audio</link>">
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<!ENTITY v4l2-audioout "struct <link linkend='v4l2-audioout'>v4l2_audioout</link>">
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<!ENTITY v4l2-bt-timings "struct <link linkend='v4l2-bt-timings'>v4l2_bt_timings</link>">
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<!ENTITY v4l2-buffer "struct <link linkend='v4l2-buffer'>v4l2_buffer</link>">
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<!ENTITY v4l2-capability "struct <link linkend='v4l2-capability'>v4l2_capability</link>">
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<!ENTITY v4l2-captureparm "struct <link linkend='v4l2-captureparm'>v4l2_captureparm</link>">
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@ -128,6 +135,9 @@
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<!ENTITY v4l2-dbg-chip-ident "struct <link linkend='v4l2-dbg-chip-ident'>v4l2_dbg_chip_ident</link>">
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<!ENTITY v4l2-dbg-match "struct <link linkend='v4l2-dbg-match'>v4l2_dbg_match</link>">
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<!ENTITY v4l2-dbg-register "struct <link linkend='v4l2-dbg-register'>v4l2_dbg_register</link>">
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<!ENTITY v4l2-dv-enum-preset "struct <link linkend='v4l2-dv-enum-preset'>v4l2_dv_enum_preset</link>">
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<!ENTITY v4l2-dv-preset "struct <link linkend='v4l2-dv-preset'>v4l2_dv_preset</link>">
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<!ENTITY v4l2-dv-timings "struct <link linkend='v4l2-dv-timings'>v4l2_dv_timings</link>">
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<!ENTITY v4l2-enc-idx "struct <link linkend='v4l2-enc-idx'>v4l2_enc_idx</link>">
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<!ENTITY v4l2-enc-idx-entry "struct <link linkend='v4l2-enc-idx-entry'>v4l2_enc_idx_entry</link>">
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<!ENTITY v4l2-encoder-cmd "struct <link linkend='v4l2-encoder-cmd'>v4l2_encoder_cmd</link>">
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@ -243,6 +253,10 @@
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<!ENTITY sub-enumaudioout SYSTEM "v4l/vidioc-enumaudioout.xml">
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<!ENTITY sub-enuminput SYSTEM "v4l/vidioc-enuminput.xml">
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<!ENTITY sub-enumoutput SYSTEM "v4l/vidioc-enumoutput.xml">
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<!ENTITY sub-enum-dv-presets SYSTEM "v4l/vidioc-enum-dv-presets.xml">
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<!ENTITY sub-g-dv-preset SYSTEM "v4l/vidioc-g-dv-preset.xml">
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<!ENTITY sub-query-dv-preset SYSTEM "v4l/vidioc-query-dv-preset.xml">
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<!ENTITY sub-g-dv-timings SYSTEM "v4l/vidioc-g-dv-timings.xml">
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<!ENTITY sub-enumstd SYSTEM "v4l/vidioc-enumstd.xml">
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<!ENTITY sub-g-audio SYSTEM "v4l/vidioc-g-audio.xml">
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<!ENTITY sub-g-audioout SYSTEM "v4l/vidioc-g-audioout.xml">
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@ -333,6 +347,10 @@
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<!ENTITY enumaudioout SYSTEM "v4l/vidioc-enumaudioout.xml">
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<!ENTITY enuminput SYSTEM "v4l/vidioc-enuminput.xml">
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<!ENTITY enumoutput SYSTEM "v4l/vidioc-enumoutput.xml">
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<!ENTITY enum-dv-presets SYSTEM "v4l/vidioc-enum-dv-presets.xml">
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<!ENTITY g-dv-preset SYSTEM "v4l/vidioc-g-dv-preset.xml">
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<!ENTITY query-dv-preset SYSTEM "v4l/vidioc-query-dv-preset.xml">
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<!ENTITY g-dv-timings SYSTEM "v4l/vidioc-g-dv-timings.xml">
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<!ENTITY enumstd SYSTEM "v4l/vidioc-enumstd.xml">
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<!ENTITY g-audio SYSTEM "v4l/vidioc-g-audio.xml">
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<!ENTITY g-audioout SYSTEM "v4l/vidioc-g-audioout.xml">
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@ -36,6 +36,7 @@
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<indexentry><primaryie>enum <link linkend='v4l2-preemphasis'>v4l2_preemphasis</link></primaryie></indexentry>
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<indexentry><primaryie>struct <link linkend='v4l2-audio'>v4l2_audio</link></primaryie></indexentry>
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<indexentry><primaryie>struct <link linkend='v4l2-audioout'>v4l2_audioout</link></primaryie></indexentry>
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<indexentry><primaryie>struct <link linkend='v4l2-bt-timings'>v4l2_bt_timings</link></primaryie></indexentry>
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<indexentry><primaryie>struct <link linkend='v4l2-buffer'>v4l2_buffer</link></primaryie></indexentry>
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<indexentry><primaryie>struct <link linkend='v4l2-capability'>v4l2_capability</link></primaryie></indexentry>
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<indexentry><primaryie>struct <link linkend='v4l2-captureparm'>v4l2_captureparm</link></primaryie></indexentry>
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@ -46,6 +47,9 @@
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<indexentry><primaryie>struct <link linkend='v4l2-dbg-chip-ident'>v4l2_dbg_chip_ident</link></primaryie></indexentry>
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<indexentry><primaryie>struct <link linkend='v4l2-dbg-match'>v4l2_dbg_match</link></primaryie></indexentry>
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<indexentry><primaryie>struct <link linkend='v4l2-dbg-register'>v4l2_dbg_register</link></primaryie></indexentry>
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<indexentry><primaryie>struct <link linkend='v4l2-dv-enum-preset'>v4l2_dv_enum_preset</link></primaryie></indexentry>
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<indexentry><primaryie>struct <link linkend='v4l2-dv-preset'>v4l2_dv_preset</link></primaryie></indexentry>
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<indexentry><primaryie>struct <link linkend='v4l2-dv-timings'>v4l2_dv_timings</link></primaryie></indexentry>
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<indexentry><primaryie>struct <link linkend='v4l2-enc-idx'>v4l2_enc_idx</link></primaryie></indexentry>
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<indexentry><primaryie>struct <link linkend='v4l2-enc-idx-entry'>v4l2_enc_idx_entry</link></primaryie></indexentry>
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<indexentry><primaryie>struct <link linkend='v4l2-encoder-cmd'>v4l2_encoder_cmd</link></primaryie></indexentry>
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@ -716,6 +716,41 @@ if (-1 == ioctl (fd, &VIDIOC-S-STD;, &std_id)) {
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}
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</programlisting>
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</example>
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<section id="dv-timings">
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<title>Digital Video (DV) Timings</title>
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<para>
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The video standards discussed so far has been dealing with Analog TV and the
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corresponding video timings. Today there are many more different hardware interfaces
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such as High Definition TV interfaces (HDMI), VGA, DVI connectors etc., that carry
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video signals and there is a need to extend the API to select the video timings
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for these interfaces. Since it is not possible to extend the &v4l2-std-id; due to
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the limited bits available, a new set of IOCTLs is added to set/get video timings at
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the input and output: </para><itemizedlist>
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<listitem>
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<para>DV Presets: Digital Video (DV) presets. These are IDs representing a
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video timing at the input/output. Presets are pre-defined timings implemented
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by the hardware according to video standards. A __u32 data type is used to represent
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a preset unlike the bit mask that is used in &v4l2-std-id; allowing future extensions
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to support as many different presets as needed.</para>
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</listitem>
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<listitem>
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<para>Custom DV Timings: This will allow applications to define more detailed
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custom video timings for the interface. This includes parameters such as width, height,
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polarities, frontporch, backporch etc.
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</para>
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</listitem>
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</itemizedlist>
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<para>To enumerate and query the attributes of DV presets supported by a device,
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applications use the &VIDIOC-ENUM-DV-PRESETS; ioctl. To get the current DV preset,
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applications use the &VIDIOC-G-DV-PRESET; ioctl and to set a preset they use the
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&VIDIOC-S-DV-PRESET; ioctl.</para>
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<para>To set custom DV timings for the device, applications use the
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&VIDIOC-S-DV-TIMINGS; ioctl and to get current custom DV timings they use the
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&VIDIOC-G-DV-TIMINGS; ioctl.</para>
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<para>Applications can make use of the <xref linkend="input-capabilities" /> and
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<xref linkend="output-capabilities"/> flags to decide what ioctls are available to set the
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video timings for the device.</para>
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</section>
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</section>
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&sub-controls;
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@ -411,6 +411,7 @@ and discussions on the V4L mailing list.</revremark>
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&sub-encoder-cmd;
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&sub-enumaudio;
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&sub-enumaudioout;
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&sub-enum-dv-presets;
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&sub-enum-fmt;
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&sub-enum-framesizes;
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&sub-enum-frameintervals;
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@ -421,6 +422,8 @@ and discussions on the V4L mailing list.</revremark>
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&sub-g-audioout;
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&sub-g-crop;
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&sub-g-ctrl;
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&sub-g-dv-preset;
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&sub-g-dv-timings;
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&sub-g-enc-index;
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&sub-g-ext-ctrls;
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&sub-g-fbuf;
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@ -441,6 +444,7 @@ and discussions on the V4L mailing list.</revremark>
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&sub-querybuf;
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&sub-querycap;
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&sub-queryctrl;
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&sub-query-dv-preset;
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&sub-querystd;
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&sub-reqbufs;
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&sub-s-hw-freq-seek;
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@ -733,6 +733,99 @@ struct <link linkend="v4l2-standard">v4l2_standard</link> {
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__u32 reserved[4];
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};
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/*
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* V I D E O T I M I N G S D V P R E S E T
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*/
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struct <link linkend="v4l2-dv-preset">v4l2_dv_preset</link> {
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__u32 preset;
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__u32 reserved[4];
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};
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/*
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* D V P R E S E T S E N U M E R A T I O N
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*/
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struct <link linkend="v4l2-dv-enum-preset">v4l2_dv_enum_preset</link> {
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__u32 index;
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__u32 preset;
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__u8 name[32]; /* Name of the preset timing */
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__u32 width;
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__u32 height;
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__u32 reserved[4];
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};
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/*
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* D V P R E S E T V A L U E S
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*/
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#define V4L2_DV_INVALID 0
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#define V4L2_DV_480P59_94 1 /* BT.1362 */
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#define V4L2_DV_576P50 2 /* BT.1362 */
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#define V4L2_DV_720P24 3 /* SMPTE 296M */
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#define V4L2_DV_720P25 4 /* SMPTE 296M */
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#define V4L2_DV_720P30 5 /* SMPTE 296M */
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#define V4L2_DV_720P50 6 /* SMPTE 296M */
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#define V4L2_DV_720P59_94 7 /* SMPTE 274M */
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#define V4L2_DV_720P60 8 /* SMPTE 274M/296M */
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#define V4L2_DV_1080I29_97 9 /* BT.1120/ SMPTE 274M */
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#define V4L2_DV_1080I30 10 /* BT.1120/ SMPTE 274M */
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#define V4L2_DV_1080I25 11 /* BT.1120 */
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#define V4L2_DV_1080I50 12 /* SMPTE 296M */
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#define V4L2_DV_1080I60 13 /* SMPTE 296M */
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#define V4L2_DV_1080P24 14 /* SMPTE 296M */
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#define V4L2_DV_1080P25 15 /* SMPTE 296M */
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#define V4L2_DV_1080P30 16 /* SMPTE 296M */
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#define V4L2_DV_1080P50 17 /* BT.1120 */
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#define V4L2_DV_1080P60 18 /* BT.1120 */
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/*
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* D V B T T I M I N G S
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*/
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/* BT.656/BT.1120 timing data */
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struct <link linkend="v4l2-bt-timings">v4l2_bt_timings</link> {
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__u32 width; /* width in pixels */
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__u32 height; /* height in lines */
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__u32 interlaced; /* Interlaced or progressive */
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__u32 polarities; /* Positive or negative polarity */
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__u64 pixelclock; /* Pixel clock in HZ. Ex. 74.25MHz->74250000 */
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__u32 hfrontporch; /* Horizpontal front porch in pixels */
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__u32 hsync; /* Horizontal Sync length in pixels */
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__u32 hbackporch; /* Horizontal back porch in pixels */
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__u32 vfrontporch; /* Vertical front porch in pixels */
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__u32 vsync; /* Vertical Sync length in lines */
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__u32 vbackporch; /* Vertical back porch in lines */
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__u32 il_vfrontporch; /* Vertical front porch for bottom field of
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* interlaced field formats
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*/
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__u32 il_vsync; /* Vertical sync length for bottom field of
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* interlaced field formats
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*/
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__u32 il_vbackporch; /* Vertical back porch for bottom field of
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* interlaced field formats
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*/
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__u32 reserved[16];
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} __attribute__ ((packed));
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/* Interlaced or progressive format */
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#define V4L2_DV_PROGRESSIVE 0
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#define V4L2_DV_INTERLACED 1
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/* Polarities. If bit is not set, it is assumed to be negative polarity */
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#define V4L2_DV_VSYNC_POS_POL 0x00000001
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#define V4L2_DV_HSYNC_POS_POL 0x00000002
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/* DV timings */
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struct <link linkend="v4l2-dv-timings">v4l2_dv_timings</link> {
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__u32 type;
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union {
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struct <link linkend="v4l2-bt-timings">v4l2_bt_timings</link> bt;
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__u32 reserved[32];
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};
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} __attribute__ ((packed));
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/* Values for the type field */
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#define V4L2_DV_BT_656_1120 0 /* BT.656/1120 timing type */
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/*
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* V I D E O I N P U T S
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*/
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@ -744,7 +837,8 @@ struct <link linkend="v4l2-input">v4l2_input</link> {
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__u32 tuner; /* Associated tuner */
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v4l2_std_id std;
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__u32 status;
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__u32 reserved[4];
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__u32 capabilities;
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__u32 reserved[3];
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};
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/* Values for the 'type' field */
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@ -775,6 +869,11 @@ struct <link linkend="v4l2-input">v4l2_input</link> {
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#define V4L2_IN_ST_NO_ACCESS 0x02000000 /* Conditional access denied */
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#define V4L2_IN_ST_VTR 0x04000000 /* VTR time constant */
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/* capabilities flags */
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#define V4L2_IN_CAP_PRESETS 0x00000001 /* Supports S_DV_PRESET */
|
||||
#define V4L2_IN_CAP_CUSTOM_TIMINGS 0x00000002 /* Supports S_DV_TIMINGS */
|
||||
#define V4L2_IN_CAP_STD 0x00000004 /* Supports S_STD */
|
||||
|
||||
/*
|
||||
* V I D E O O U T P U T S
|
||||
*/
|
||||
|
|
@ -785,13 +884,19 @@ struct <link linkend="v4l2-output">v4l2_output</link> {
|
|||
__u32 audioset; /* Associated audios (bitfield) */
|
||||
__u32 modulator; /* Associated modulator */
|
||||
v4l2_std_id std;
|
||||
__u32 reserved[4];
|
||||
__u32 capabilities;
|
||||
__u32 reserved[3];
|
||||
};
|
||||
/* Values for the 'type' field */
|
||||
#define V4L2_OUTPUT_TYPE_MODULATOR 1
|
||||
#define V4L2_OUTPUT_TYPE_ANALOG 2
|
||||
#define V4L2_OUTPUT_TYPE_ANALOGVGAOVERLAY 3
|
||||
|
||||
/* capabilities flags */
|
||||
#define V4L2_OUT_CAP_PRESETS 0x00000001 /* Supports S_DV_PRESET */
|
||||
#define V4L2_OUT_CAP_CUSTOM_TIMINGS 0x00000002 /* Supports S_DV_TIMINGS */
|
||||
#define V4L2_OUT_CAP_STD 0x00000004 /* Supports S_STD */
|
||||
|
||||
/*
|
||||
* C O N T R O L S
|
||||
*/
|
||||
|
|
@ -1626,6 +1731,13 @@ struct <link linkend="v4l2-dbg-chip-ident">v4l2_dbg_chip_ident</link> {
|
|||
#endif
|
||||
|
||||
#define VIDIOC_S_HW_FREQ_SEEK _IOW('V', 82, struct <link linkend="v4l2-hw-freq-seek">v4l2_hw_freq_seek</link>)
|
||||
#define VIDIOC_ENUM_DV_PRESETS _IOWR('V', 83, struct <link linkend="v4l2-dv-enum-preset">v4l2_dv_enum_preset</link>)
|
||||
#define VIDIOC_S_DV_PRESET _IOWR('V', 84, struct <link linkend="v4l2-dv-preset">v4l2_dv_preset</link>)
|
||||
#define VIDIOC_G_DV_PRESET _IOWR('V', 85, struct <link linkend="v4l2-dv-preset">v4l2_dv_preset</link>)
|
||||
#define VIDIOC_QUERY_DV_PRESET _IOR('V', 86, struct <link linkend="v4l2-dv-preset">v4l2_dv_preset</link>)
|
||||
#define VIDIOC_S_DV_TIMINGS _IOWR('V', 87, struct <link linkend="v4l2-dv-timings">v4l2_dv_timings</link>)
|
||||
#define VIDIOC_G_DV_TIMINGS _IOWR('V', 88, struct <link linkend="v4l2-dv-timings">v4l2_dv_timings</link>)
|
||||
|
||||
/* Reminder: when adding new ioctls please add support for them to
|
||||
drivers/media/video/v4l2-compat-ioctl32.c as well! */
|
||||
|
||||
|
|
|
|||
238
Documentation/DocBook/v4l/vidioc-enum-dv-presets.xml
Normal file
238
Documentation/DocBook/v4l/vidioc-enum-dv-presets.xml
Normal file
|
|
@ -0,0 +1,238 @@
|
|||
<refentry id="vidioc-enum-dv-presets">
|
||||
<refmeta>
|
||||
<refentrytitle>ioctl VIDIOC_ENUM_DV_PRESETS</refentrytitle>
|
||||
&manvol;
|
||||
</refmeta>
|
||||
|
||||
<refnamediv>
|
||||
<refname>VIDIOC_ENUM_DV_PRESETS</refname>
|
||||
<refpurpose>Enumerate supported Digital Video presets</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_dv_enum_preset *<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_ENUM_DV_PRESETS</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 DV preset, applications initialize the
|
||||
<structfield>index</structfield> field and zero the reserved array of &v4l2-dv-enum-preset;
|
||||
and call the <constant>VIDIOC_ENUM_DV_PRESETS</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 DV Presets supported,
|
||||
applications shall begin at index zero, incrementing by one until the
|
||||
driver returns <errorcode>EINVAL</errorcode>. Drivers may enumerate a
|
||||
different set of DV presets after switching the video input or
|
||||
output.</para>
|
||||
|
||||
<table pgwide="1" frame="none" id="v4l2-dv-enum-preset">
|
||||
<title>struct <structname>v4l2_dv_enum_presets</structname></title>
|
||||
<tgroup cols="3">
|
||||
&cs-str;
|
||||
<tbody valign="top">
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>index</structfield></entry>
|
||||
<entry>Number of the DV preset, set by the
|
||||
application.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>preset</structfield></entry>
|
||||
<entry>This field identifies one of the DV preset values listed in <xref linkend="v4l2-dv-presets-vals"/>.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u8</entry>
|
||||
<entry><structfield>name</structfield>[24]</entry>
|
||||
<entry>Name of the preset, a NUL-terminated ASCII string, for example: "720P-60", "1080I-60". This information is
|
||||
intended for the user.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>width</structfield></entry>
|
||||
<entry>Width of the active video in pixels for the DV preset.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>height</structfield></entry>
|
||||
<entry>Height of the active video in lines for the DV preset.</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-dv-presets-vals">
|
||||
<title>struct <structname>DV Presets</structname></title>
|
||||
<tgroup cols="3">
|
||||
&cs-str;
|
||||
<tbody valign="top">
|
||||
<row>
|
||||
<entry>Preset</entry>
|
||||
<entry>Preset value</entry>
|
||||
<entry>Description</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry></entry>
|
||||
<entry></entry>
|
||||
<entry></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_INVALID</entry>
|
||||
<entry>0</entry>
|
||||
<entry>Invalid preset value.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_480P59_94</entry>
|
||||
<entry>1</entry>
|
||||
<entry>720x480 progressive video at 59.94 fps as per BT.1362.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_576P50</entry>
|
||||
<entry>2</entry>
|
||||
<entry>720x576 progressive video at 50 fps as per BT.1362.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_720P24</entry>
|
||||
<entry>3</entry>
|
||||
<entry>1280x720 progressive video at 24 fps as per SMPTE 296M.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_720P25</entry>
|
||||
<entry>4</entry>
|
||||
<entry>1280x720 progressive video at 25 fps as per SMPTE 296M.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_720P30</entry>
|
||||
<entry>5</entry>
|
||||
<entry>1280x720 progressive video at 30 fps as per SMPTE 296M.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_720P50</entry>
|
||||
<entry>6</entry>
|
||||
<entry>1280x720 progressive video at 50 fps as per SMPTE 296M.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_720P59_94</entry>
|
||||
<entry>7</entry>
|
||||
<entry>1280x720 progressive video at 59.94 fps as per SMPTE 274M.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_720P60</entry>
|
||||
<entry>8</entry>
|
||||
<entry>1280x720 progressive video at 60 fps as per SMPTE 274M/296M.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_1080I29_97</entry>
|
||||
<entry>9</entry>
|
||||
<entry>1920x1080 interlaced video at 29.97 fps as per BT.1120/SMPTE 274M.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_1080I30</entry>
|
||||
<entry>10</entry>
|
||||
<entry>1920x1080 interlaced video at 30 fps as per BT.1120/SMPTE 274M.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_1080I25</entry>
|
||||
<entry>11</entry>
|
||||
<entry>1920x1080 interlaced video at 25 fps as per BT.1120.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_1080I50</entry>
|
||||
<entry>12</entry>
|
||||
<entry>1920x1080 interlaced video at 50 fps as per SMPTE 296M.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_1080I60</entry>
|
||||
<entry>13</entry>
|
||||
<entry>1920x1080 interlaced video at 60 fps as per SMPTE 296M.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_1080P24</entry>
|
||||
<entry>14</entry>
|
||||
<entry>1920x1080 progressive video at 24 fps as per SMPTE 296M.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_1080P25</entry>
|
||||
<entry>15</entry>
|
||||
<entry>1920x1080 progressive video at 25 fps as per SMPTE 296M.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_1080P30</entry>
|
||||
<entry>16</entry>
|
||||
<entry>1920x1080 progressive video at 30 fps as per SMPTE 296M.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_1080P50</entry>
|
||||
<entry>17</entry>
|
||||
<entry>1920x1080 progressive video at 50 fps as per BT.1120.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_1080P60</entry>
|
||||
<entry>18</entry>
|
||||
<entry>1920x1080 progressive video at 60 fps as per BT.1120.</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</table>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
&return-value;
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><errorcode>EINVAL</errorcode></term>
|
||||
<listitem>
|
||||
<para>The &v4l2-dv-enum-preset; <structfield>index</structfield>
|
||||
is out of bounds.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</refsect1>
|
||||
</refentry>
|
||||
|
||||
<!--
|
||||
Local Variables:
|
||||
mode: sgml
|
||||
sgml-parent-document: "v4l2.sgml"
|
||||
indent-tabs-mode: nil
|
||||
End:
|
||||
-->
|
||||
|
|
@ -124,7 +124,13 @@ current input.</entry>
|
|||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>reserved</structfield>[4]</entry>
|
||||
<entry><structfield>capabilities</structfield></entry>
|
||||
<entry>This field provides capabilities for the
|
||||
input. See <xref linkend="input-capabilities" /> for flags.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>reserved</structfield>[3]</entry>
|
||||
<entry>Reserved for future extensions. Drivers must set
|
||||
the array to zero.</entry>
|
||||
</row>
|
||||
|
|
@ -261,6 +267,34 @@ flag is set Macrovision has been detected.</entry>
|
|||
</tbody>
|
||||
</tgroup>
|
||||
</table>
|
||||
|
||||
<!-- Capability flags based on video timings RFC by Muralidharan
|
||||
Karicheri, titled RFC (v1.2): V4L - Support for video timings at the
|
||||
input/output interface to linux-media@vger.kernel.org on 19 Oct 2009.
|
||||
-->
|
||||
<table frame="none" pgwide="1" id="input-capabilities">
|
||||
<title>Input capabilities</title>
|
||||
<tgroup cols="3">
|
||||
&cs-def;
|
||||
<tbody valign="top">
|
||||
<row>
|
||||
<entry><constant>V4L2_IN_CAP_PRESETS</constant></entry>
|
||||
<entry>0x00000001</entry>
|
||||
<entry>This input supports setting DV presets by using VIDIOC_S_DV_PRESET.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><constant>V4L2_OUT_CAP_CUSTOM_TIMINGS</constant></entry>
|
||||
<entry>0x00000002</entry>
|
||||
<entry>This input supports setting custom video timings by using VIDIOC_S_DV_TIMINGS.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><constant>V4L2_IN_CAP_STD</constant></entry>
|
||||
<entry>0x00000004</entry>
|
||||
<entry>This input supports setting the TV standard by using VIDIOC_S_STD.</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</table>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
|
|
|
|||
|
|
@ -114,7 +114,13 @@ details on video standards and how to switch see <xref
|
|||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>reserved</structfield>[4]</entry>
|
||||
<entry><structfield>capabilities</structfield></entry>
|
||||
<entry>This field provides capabilities for the
|
||||
output. See <xref linkend="output-capabilities" /> for flags.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>reserved</structfield>[3]</entry>
|
||||
<entry>Reserved for future extensions. Drivers must set
|
||||
the array to zero.</entry>
|
||||
</row>
|
||||
|
|
@ -147,6 +153,34 @@ CVBS, S-Video, RGB.</entry>
|
|||
</tgroup>
|
||||
</table>
|
||||
|
||||
<!-- Capabilities flags based on video timings RFC by Muralidharan
|
||||
Karicheri, titled RFC (v1.2): V4L - Support for video timings at the
|
||||
input/output interface to linux-media@vger.kernel.org on 19 Oct 2009.
|
||||
-->
|
||||
<table frame="none" pgwide="1" id="output-capabilities">
|
||||
<title>Output capabilities</title>
|
||||
<tgroup cols="3">
|
||||
&cs-def;
|
||||
<tbody valign="top">
|
||||
<row>
|
||||
<entry><constant>V4L2_OUT_CAP_PRESETS</constant></entry>
|
||||
<entry>0x00000001</entry>
|
||||
<entry>This output supports setting DV presets by using VIDIOC_S_DV_PRESET.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><constant>V4L2_OUT_CAP_CUSTOM_TIMINGS</constant></entry>
|
||||
<entry>0x00000002</entry>
|
||||
<entry>This output supports setting custom video timings by using VIDIOC_S_DV_TIMINGS.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><constant>V4L2_OUT_CAP_STD</constant></entry>
|
||||
<entry>0x00000004</entry>
|
||||
<entry>This output supports setting the TV standard by using VIDIOC_S_STD.</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</table>
|
||||
|
||||
</refsect1>
|
||||
<refsect1>
|
||||
&return-value;
|
||||
|
|
|
|||
111
Documentation/DocBook/v4l/vidioc-g-dv-preset.xml
Normal file
111
Documentation/DocBook/v4l/vidioc-g-dv-preset.xml
Normal file
|
|
@ -0,0 +1,111 @@
|
|||
<refentry id="vidioc-g-dv-preset">
|
||||
<refmeta>
|
||||
<refentrytitle>ioctl VIDIOC_G_DV_PRESET, VIDIOC_S_DV_PRESET</refentrytitle>
|
||||
&manvol;
|
||||
</refmeta>
|
||||
|
||||
<refnamediv>
|
||||
<refname>VIDIOC_G_DV_PRESET</refname>
|
||||
<refname>VIDIOC_S_DV_PRESET</refname>
|
||||
<refpurpose>Query or select the DV preset of the current input or output</refpurpose>
|
||||
</refnamediv>
|
||||
|
||||
<refsynopsisdiv>
|
||||
<funcsynopsis>
|
||||
<funcprototype>
|
||||
<funcdef>int <function>ioctl</function></funcdef>
|
||||
<paramdef>int <parameter>fd</parameter></paramdef>
|
||||
<paramdef>int <parameter>request</parameter></paramdef>
|
||||
<paramdef>&v4l2-dv-preset;
|
||||
*<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_DV_PRESET, VIDIOC_S_DV_PRESET</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry>
|
||||
<term><parameter>argp</parameter></term>
|
||||
<listitem>
|
||||
<para></para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Description</title>
|
||||
<para>To query and select the current DV preset, applications
|
||||
use the <constant>VIDIOC_G_DV_PRESET</constant> and <constant>VIDIOC_S_DV_PRESET</constant>
|
||||
ioctls which take a pointer to a &v4l2-dv-preset; type as argument.
|
||||
Applications must zero the reserved array in &v4l2-dv-preset;.
|
||||
<constant>VIDIOC_G_DV_PRESET</constant> returns a dv preset in the field
|
||||
<structfield>preset</structfield> of &v4l2-dv-preset;.</para>
|
||||
|
||||
<para><constant>VIDIOC_S_DV_PRESET</constant> accepts a pointer to a &v4l2-dv-preset;
|
||||
that has the preset value to be set. Applications must zero the reserved array in &v4l2-dv-preset;.
|
||||
If the preset is not supported, it returns an &EINVAL; </para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
&return-value;
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><errorcode>EINVAL</errorcode></term>
|
||||
<listitem>
|
||||
<para>This ioctl is not supported, or the
|
||||
<constant>VIDIOC_S_DV_PRESET</constant>,<constant>VIDIOC_S_DV_PRESET</constant> parameter was unsuitable.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry>
|
||||
<term><errorcode>EBUSY</errorcode></term>
|
||||
<listitem>
|
||||
<para>The device is busy and therefore can not change the preset.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
|
||||
<table pgwide="1" frame="none" id="v4l2-dv-preset">
|
||||
<title>struct <structname>v4l2_dv_preset</structname></title>
|
||||
<tgroup cols="3">
|
||||
&cs-str;
|
||||
<tbody valign="top">
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>preset</structfield></entry>
|
||||
<entry>Preset value to represent the digital video timings</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>reserved[4]</structfield></entry>
|
||||
<entry>Reserved fields for future use</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</table>
|
||||
|
||||
</refsect1>
|
||||
</refentry>
|
||||
|
||||
<!--
|
||||
Local Variables:
|
||||
mode: sgml
|
||||
sgml-parent-document: "v4l2.sgml"
|
||||
indent-tabs-mode: nil
|
||||
End:
|
||||
-->
|
||||
224
Documentation/DocBook/v4l/vidioc-g-dv-timings.xml
Normal file
224
Documentation/DocBook/v4l/vidioc-g-dv-timings.xml
Normal file
|
|
@ -0,0 +1,224 @@
|
|||
<refentry id="vidioc-g-dv-timings">
|
||||
<refmeta>
|
||||
<refentrytitle>ioctl VIDIOC_G_DV_TIMINGS, VIDIOC_S_DV_TIMINGS</refentrytitle>
|
||||
&manvol;
|
||||
</refmeta>
|
||||
|
||||
<refnamediv>
|
||||
<refname>VIDIOC_G_DV_TIMINGS</refname>
|
||||
<refname>VIDIOC_S_DV_TIMINGS</refname>
|
||||
<refpurpose>Get or set custom DV timings for input or output</refpurpose>
|
||||
</refnamediv>
|
||||
|
||||
<refsynopsisdiv>
|
||||
<funcsynopsis>
|
||||
<funcprototype>
|
||||
<funcdef>int <function>ioctl</function></funcdef>
|
||||
<paramdef>int <parameter>fd</parameter></paramdef>
|
||||
<paramdef>int <parameter>request</parameter></paramdef>
|
||||
<paramdef>&v4l2-dv-timings;
|
||||
*<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_DV_TIMINGS, VIDIOC_S_DV_TIMINGS</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry>
|
||||
<term><parameter>argp</parameter></term>
|
||||
<listitem>
|
||||
<para></para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Description</title>
|
||||
<para>To set custom DV timings for the input or output, applications use the
|
||||
<constant>VIDIOC_S_DV_TIMINGS</constant> ioctl and to get the current custom timings,
|
||||
applications use the <constant>VIDIOC_G_DV_TIMINGS</constant> ioctl. The detailed timing
|
||||
information is filled in using the structure &v4l2-dv-timings;. These ioctls take
|
||||
a pointer to the &v4l2-dv-timings; structure as argument. If the ioctl is not supported
|
||||
or the timing values are not correct, the driver returns &EINVAL;.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
&return-value;
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><errorcode>EINVAL</errorcode></term>
|
||||
<listitem>
|
||||
<para>This ioctl is not supported, or the
|
||||
<constant>VIDIOC_S_DV_TIMINGS</constant> parameter was unsuitable.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry>
|
||||
<term><errorcode>EBUSY</errorcode></term>
|
||||
<listitem>
|
||||
<para>The device is busy and therefore can not change the timings.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
|
||||
<table pgwide="1" frame="none" id="v4l2-bt-timings">
|
||||
<title>struct <structname>v4l2_bt_timings</structname></title>
|
||||
<tgroup cols="3">
|
||||
&cs-str;
|
||||
<tbody valign="top">
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>width</structfield></entry>
|
||||
<entry>Width of the active video in pixels</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>height</structfield></entry>
|
||||
<entry>Height of the active video in lines</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>interlaced</structfield></entry>
|
||||
<entry>Progressive (0) or interlaced (1)</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>polarities</structfield></entry>
|
||||
<entry>This is a bit mask that defines polarities of sync signals.
|
||||
bit 0 (V4L2_DV_VSYNC_POS_POL) is for vertical sync polarity and bit 1 (V4L2_DV_HSYNC_POS_POL) is for horizontal sync polarity. If the bit is set
|
||||
(1) it is positive polarity and if is cleared (0), it is negative polarity.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u64</entry>
|
||||
<entry><structfield>pixelclock</structfield></entry>
|
||||
<entry>Pixel clock in Hz. Ex. 74.25MHz->74250000</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>hfrontporch</structfield></entry>
|
||||
<entry>Horizontal front porch in pixels</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>hsync</structfield></entry>
|
||||
<entry>Horizontal sync length in pixels</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>hbackporch</structfield></entry>
|
||||
<entry>Horizontal back porch in pixels</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>vfrontporch</structfield></entry>
|
||||
<entry>Vertical front porch in lines</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>vsync</structfield></entry>
|
||||
<entry>Vertical sync length in lines</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>vbackporch</structfield></entry>
|
||||
<entry>Vertical back porch in lines</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>il_vfrontporch</structfield></entry>
|
||||
<entry>Vertical front porch in lines for bottom field of interlaced field formats</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>il_vsync</structfield></entry>
|
||||
<entry>Vertical sync length in lines for bottom field of interlaced field formats</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>il_vbackporch</structfield></entry>
|
||||
<entry>Vertical back porch in lines for bottom field of interlaced field formats</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</table>
|
||||
|
||||
<table pgwide="1" frame="none" id="v4l2-dv-timings">
|
||||
<title>struct <structname>v4l2_dv_timings</structname></title>
|
||||
<tgroup cols="4">
|
||||
&cs-str;
|
||||
<tbody valign="top">
|
||||
<row>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>type</structfield></entry>
|
||||
<entry></entry>
|
||||
<entry>Type of DV timings as listed in <xref linkend="dv-timing-types"/>.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>union</entry>
|
||||
<entry><structfield></structfield></entry>
|
||||
<entry></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry></entry>
|
||||
<entry>&v4l2-bt-timings;</entry>
|
||||
<entry><structfield>bt</structfield></entry>
|
||||
<entry>Timings defined by BT.656/1120 specifications</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry></entry>
|
||||
<entry>__u32</entry>
|
||||
<entry><structfield>reserved</structfield>[32]</entry>
|
||||
<entry></entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</table>
|
||||
|
||||
<table pgwide="1" frame="none" id="dv-timing-types">
|
||||
<title>DV Timing types</title>
|
||||
<tgroup cols="3">
|
||||
&cs-str;
|
||||
<tbody valign="top">
|
||||
<row>
|
||||
<entry>Timing type</entry>
|
||||
<entry>value</entry>
|
||||
<entry>Description</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry></entry>
|
||||
<entry></entry>
|
||||
<entry></entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>V4L2_DV_BT_656_1120</entry>
|
||||
<entry>0</entry>
|
||||
<entry>BT.656/1120 timings</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</table>
|
||||
</refsect1>
|
||||
</refentry>
|
||||
|
||||
<!--
|
||||
Local Variables:
|
||||
mode: sgml
|
||||
sgml-parent-document: "v4l2.sgml"
|
||||
indent-tabs-mode: nil
|
||||
End:
|
||||
-->
|
||||
85
Documentation/DocBook/v4l/vidioc-query-dv-preset.xml
Normal file
85
Documentation/DocBook/v4l/vidioc-query-dv-preset.xml
Normal file
|
|
@ -0,0 +1,85 @@
|
|||
<refentry id="vidioc-query-dv-preset">
|
||||
<refmeta>
|
||||
<refentrytitle>ioctl VIDIOC_QUERY_DV_PRESET</refentrytitle>
|
||||
&manvol;
|
||||
</refmeta>
|
||||
|
||||
<refnamediv>
|
||||
<refname>VIDIOC_QUERY_DV_PRESET</refname>
|
||||
<refpurpose>Sense the DV preset received by the current
|
||||
input</refpurpose>
|
||||
</refnamediv>
|
||||
|
||||
<refsynopsisdiv>
|
||||
<funcsynopsis>
|
||||
<funcprototype>
|
||||
<funcdef>int <function>ioctl</function></funcdef>
|
||||
<paramdef>int <parameter>fd</parameter></paramdef>
|
||||
<paramdef>int <parameter>request</parameter></paramdef>
|
||||
<paramdef>&v4l2-dv-preset; *<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_QUERY_DV_PRESET</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry>
|
||||
<term><parameter>argp</parameter></term>
|
||||
<listitem>
|
||||
<para></para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
<title>Description</title>
|
||||
|
||||
<para>The hardware may be able to detect the current DV preset
|
||||
automatically, similar to sensing the video standard. To do so, applications
|
||||
call <constant> VIDIOC_QUERY_DV_PRESET</constant> with a pointer to a
|
||||
&v4l2-dv-preset; type. Once the hardware detects a preset, that preset is
|
||||
returned in the preset field of &v4l2-dv-preset;. When detection is not
|
||||
possible or fails, the value V4L2_DV_INVALID is returned.</para>
|
||||
</refsect1>
|
||||
|
||||
<refsect1>
|
||||
&return-value;
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term><errorcode>EINVAL</errorcode></term>
|
||||
<listitem>
|
||||
<para>This ioctl is not supported.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry>
|
||||
<term><errorcode>EBUSY</errorcode></term>
|
||||
<listitem>
|
||||
<para>The device is busy and therefore can not sense the preset</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</refsect1>
|
||||
</refentry>
|
||||
|
||||
<!--
|
||||
Local Variables:
|
||||
mode: sgml
|
||||
sgml-parent-document: "v4l2.sgml"
|
||||
indent-tabs-mode: nil
|
||||
End:
|
||||
-->
|
||||
Loading…
Reference in a new issue