diff options
Diffstat (limited to 'Documentation/DocBook/media')
82 files changed, 1564 insertions, 684 deletions
diff --git a/Documentation/DocBook/media/constraints.png.b64 b/Documentation/DocBook/media/constraints.png.b64 new file mode 100644 index 000000000000..125b4a94962c --- /dev/null +++ b/Documentation/DocBook/media/constraints.png.b64 @@ -0,0 +1,59 @@ +iVBORw0KGgoAAAANSUhEUgAAAlQAAAFYCAYAAACVsmLPAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A +/wD/oL2nkwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAAd0SU1FB9sLCBIAKVtZsMAAAAxxSURBVHja +7d3ZbqvIAkDRLsv//8v0QytXvpYZap7Wko56OAnE2AXbBSbhOI7jHwAAkr1sAgAAQQUAIKgAAAQV +AICgAgBAUAEACCoAAEEFACCoAAAQVAAAzb2jvyMEWw0AmFvh37xnhgoAQFABAPT1zvruwtNlAADV +VLxsyQwVAICgAgAQVAAAggoAQFABACCoYEohuFkugKACsmLq178DIKiAyJgSVQCCCigQU6IKQFAB +BWJKVAEIKqBgKIkqAEEFFAgkUQUgqIACYSSqAAQViKkwxjIAEFSwbUyJKgBBBWJq8GUCIKhgm5gS +VQCCCsSUqAIQVMBYoSOqAAQVLOk41lwXAIIKhoqqJyFUYhkACCpYMqpiQqjEMgAQVLBUVKWEUIll +ACCoYImoygmhEssAQFDBElHVexkACCoAAEEFACCoAAAQVAAAggoAQFABAAgqAAAEFQCAoAIAEFQA +AIIKAABBBQAgqAAABBUAgKACAOA/b5sAGjsO2wBgMWaoAAAEFQCAoAIAEFQAADtzUXohIQQbAYDi 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+gM7iT/m5BgQA4P+YoQIAEFQAAIIKAEBQAQAIKgAABBUAgKACABBUAAB7+hfHbDX87cMFJQAAAABJ +RU5ErkJggg== diff --git a/Documentation/DocBook/media/dvb/dvbproperty.xml b/Documentation/DocBook/media/dvb/dvbproperty.xml index 207e1a5bf8f0..ffee1fbbc001 100644 --- a/Documentation/DocBook/media/dvb/dvbproperty.xml +++ b/Documentation/DocBook/media/dvb/dvbproperty.xml @@ -334,9 +334,10 @@ typedef enum fe_rolloff { <title>fe_delivery_system type</title> <para>Possible values: </para> <programlisting> + typedef enum fe_delivery_system { SYS_UNDEFINED, - SYS_DVBC_ANNEX_AC, + SYS_DVBC_ANNEX_A, SYS_DVBC_ANNEX_B, SYS_DVBT, SYS_DSS, @@ -352,6 +353,8 @@ typedef enum fe_delivery_system { SYS_CMMB, SYS_DAB, SYS_DVBT2, + SYS_TURBO, + SYS_DVBC_ANNEX_C, } fe_delivery_system_t; </programlisting> </section> @@ -646,6 +649,18 @@ typedef enum fe_hierarchy { many data types via a single multiplex. The API will soon support this at which point this section will be expanded.</para> </section> + <section id="DTV_ENUM_DELSYS"> + <title><constant>DTV_ENUM_DELSYS</constant></title> + <para>A Multi standard frontend needs to advertise the delivery systems provided. + Applications need to enumerate the provided delivery systems, before using + any other operation with the frontend. Prior to it's introduction, + FE_GET_INFO was used to determine a frontend type. A frontend which + provides more than a single delivery system, FE_GET_INFO doesn't help much. + Applications which intends to use a multistandard frontend must enumerate + the delivery systems associated with it, rather than trying to use + FE_GET_INFO. In the case of a legacy frontend, the result is just the same + as with FE_GET_INFO, but in a more structured format </para> + </section> </section> <section id="frontend-property-terrestrial-systems"> <title>Properties used on terrestrial delivery systems</title> @@ -766,7 +781,8 @@ typedef enum fe_hierarchy { <title>Properties used on cable delivery systems</title> <section id="dvbc-params"> <title>DVB-C delivery system</title> - <para>The DVB-C Annex-A/C is the widely used cable standard. Transmission uses QAM modulation.</para> + <para>The DVB-C Annex-A is the widely used cable standard. Transmission uses QAM modulation.</para> + <para>The DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It supports a subset of the Annex A modulation types, and a roll-off of 0.13, instead of 0.15</para> <para>The following parameters are valid for DVB-C Annex A/C:</para> <itemizedlist mark='opencircle'> <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> @@ -809,6 +825,8 @@ typedef enum fe_hierarchy { <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem> <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem> + <listitem><para><link linkend="DTV-VOLTAGE"><constant>DTV_VOLTAGE</constant></link></para></listitem> + <listitem><para><link linkend="DTV-TONE"><constant>DTV_TONE</constant></link></para></listitem> </itemizedlist> <para>Future implementations might add those two missing parameters:</para> <itemizedlist mark='opencircle'> @@ -818,25 +836,18 @@ typedef enum fe_hierarchy { </section> <section id="dvbs2-params"> <title>DVB-S2 delivery system</title> - <para>The following parameters are valid for DVB-S2:</para> + <para>In addition to all parameters valid for DVB-S, DVB-S2 supports the following parameters:</para> <itemizedlist mark='opencircle'> - <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> - <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> - <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> - <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> - <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> - <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> - <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem> - <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem> - <listitem><para><link linkend="DTV-VOLTAGE"><constant>DTV_VOLTAGE</constant></link></para></listitem> - <listitem><para><link linkend="DTV-TONE"><constant>DTV_TONE</constant></link></para></listitem> + <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> <listitem><para><link linkend="DTV-PILOT"><constant>DTV_PILOT</constant></link></para></listitem> <listitem><para><link linkend="DTV-ROLLOFF"><constant>DTV_ROLLOFF</constant></link></para></listitem> </itemizedlist> - <para>Future implementations might add those two missing parameters:</para> + </section> + <section id="turbo-params"> + <title>Turbo code delivery system</title> + <para>In addition to all parameters valid for DVB-S, turbo code supports the following parameters:</para> <itemizedlist mark='opencircle'> - <listitem><para><link linkend="DTV-DISEQC-MASTER"><constant>DTV_DISEQC_MASTER</constant></link></para></listitem> - <listitem><para><link linkend="DTV-DISEQC-SLAVE-REPLY"><constant>DTV_DISEQC_SLAVE_REPLY</constant></link></para></listitem> + <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> </itemizedlist> </section> <section id="isdbs-params"> diff --git a/Documentation/DocBook/media/dvb/frontend.xml b/Documentation/DocBook/media/dvb/frontend.xml index 61407eaba020..aeaed59d0f1f 100644 --- a/Documentation/DocBook/media/dvb/frontend.xml +++ b/Documentation/DocBook/media/dvb/frontend.xml @@ -45,8 +45,8 @@ transmission. The fontend types are given by fe_type_t type, defined as:</para> </row> <row> <entry id="FE_QAM"><constant>FE_QAM</constant></entry> - <entry>For DVB-C annex A/C standard</entry> - <entry><constant>SYS_DVBC_ANNEX_AC</constant></entry> + <entry>For DVB-C annex A standard</entry> + <entry><constant>SYS_DVBC_ANNEX_A</constant></entry> </row> <row> <entry id="FE_OFDM"><constant>FE_OFDM</constant></entry> @@ -63,6 +63,10 @@ transmission. The fontend types are given by fe_type_t type, defined as:</para> <para>Newer formats like DVB-S2, ISDB-T, ISDB-S and DVB-T2 are not described at the above, as they're supported via the new <link linkend="FE_GET_SET_PROPERTY">FE_GET_PROPERTY/FE_GET_SET_PROPERTY</link> ioctl's, using the <link linkend="DTV-DELIVERY-SYSTEM">DTV_DELIVERY_SYSTEM</link> parameter. </para> + +<para>The usage of this field is deprecated, as it doesn't report all supported standards, and +will provide an incomplete information for frontends that support multiple delivery systems. +Please use <link linkend="DTV_ENUM_DELSYS">DTV_ENUM_DELSYS</link> instead.</para> </section> <section id="fe-caps-t"> diff --git a/Documentation/DocBook/media/dvb/intro.xml b/Documentation/DocBook/media/dvb/intro.xml index c75dc7cc3e9b..170064a3dc8f 100644 --- a/Documentation/DocBook/media/dvb/intro.xml +++ b/Documentation/DocBook/media/dvb/intro.xml @@ -205,7 +205,7 @@ a partial path like:</para> additional include file <emphasis role="tt">linux/dvb/version.h</emphasis> exists, which defines the constant <emphasis role="tt">DVB_API_VERSION</emphasis>. This document -describes <emphasis role="tt">DVB_API_VERSION 3</emphasis>. +describes <emphasis role="tt">DVB_API_VERSION 5.4</emphasis>. </para> </section> diff --git a/Documentation/DocBook/media/selection.png.b64 b/Documentation/DocBook/media/selection.png.b64 new file mode 100644 index 000000000000..416186558cb2 --- /dev/null +++ b/Documentation/DocBook/media/selection.png.b64 @@ -0,0 +1,206 @@ +iVBORw0KGgoAAAANSUhEUgAABIsAAAHpCAYAAAACi7yYAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A +/wD/oL2nkwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAAd0SU1FB9sLCBAiCLMGMtAAACAASURBVHja +7d3rkds4FgZQaMohTBY7ObRCV+fgyWJy4P6wJavVIgmSAIjHOVWu3bElPkBSAj5dgpdpmqYAAAAA +ACGEvzQBAAAAAHfCIgAAAAAehEUAAAAAPAiLAAAAAHgQFgEAAADwICwCAAAA4EFYBAAAAMDDD00A +21wul9XXTNN0aHnP749Z39o2rK0jRzssLX/pvVve9+61S69Jdey2bn/sMTx6TAAA/cIW+oVb+2tb +3p+izwioLIJsHYe9X+a979vae89ut6Pb1+txBwD0C3vZN0ERrFNZBAct/ZJxuVx2Vdg8v+/oLyEx +69j7xbq2/1u2e0u75Th2Mevf8ytVzDkDAOgXjtYv3LquVP0nQRHEUVkEBTsJve/r0hfu2hdz7e0W 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+baFkx/J3H/F+lD59/wPA6T5+96Muv/87pj9VZM6iFGn93mXU8uQGv8gAAAAALShSWQQAcITKokY6 +liqLAKA6eyqLfmg2AADoj2kCANhLWAQAAB0SBgGwl7BohV9kAAAAgJEIi1YIgwAAAICRCIsAAMji +Y6VCGwCo01+aAAAAAIA7lUUAACR10QQA0PZ3+TRN0+Y3XXQBAIDydnRbKNmx1EcEgC76UyqLAAAo +1vkEAOq3KyzSEQAAAADokwmuAQAAAHgQFgEAAADwICwCAAAA4EFYBAAAAMCDsAgAAACAB2ERAAAA +AA/CIgAAAAAehEUAAAAAPAiLAAAAAHgQFgEAAADwICwCAAAA4EFYBAAAAMCDsAgAAACAB2ERAAAA +AA/CIgAAAAAehEUAAAAAPAiLAAAAAHgQFgEAAADwICwCAAAA4EFYBAAAAMCDsAgAAACAB2ERAAAA +AA/CIgAAAAAe/g/10lQlA3JSSwAAAABJRU5ErkJggg== diff --git a/Documentation/DocBook/media/v4l/biblio.xml b/Documentation/DocBook/media/v4l/biblio.xml index afc8a0dd2601..cea6fd3ed428 100644 --- a/Documentation/DocBook/media/v4l/biblio.xml +++ b/Documentation/DocBook/media/v4l/biblio.xml @@ -178,11 +178,3 @@ in the frequency range from 87,5 to 108,0 MHz</title> </biblioentry> </bibliography> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/common.xml b/Documentation/DocBook/media/v4l/common.xml index a86f7a045529..c79278acfb0e 100644 --- a/Documentation/DocBook/media/v4l/common.xml +++ b/Documentation/DocBook/media/v4l/common.xml @@ -1168,6 +1168,8 @@ dheight = format.fmt.pix.height; </section> </section> + &sub-selection-api; + <section id="streaming-par"> <title>Streaming Parameters</title> @@ -1195,11 +1197,3 @@ separate parameters for input and output devices.</para> <para>These ioctls are optional, drivers need not implement them. If so, they return the &EINVAL;.</para> </section> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/compat.xml b/Documentation/DocBook/media/v4l/compat.xml index ce1004a7da52..c736380b4647 100644 --- a/Documentation/DocBook/media/v4l/compat.xml +++ b/Documentation/DocBook/media/v4l/compat.xml @@ -1082,7 +1082,7 @@ until the time in the timestamp field has arrived. I would like to follow SGI's lead, and adopt a multimedia timestamping system like their UST (Unadjusted System Time). See http://web.archive.org/web/*/http://reality.sgi.com -/cpirazzi_engr/lg/time/intro.html. +/cpirazzi_engr/lg/time/intro.html. UST uses timestamps that are 64-bit signed integers (not struct timeval's) and given in nanosecond units. The UST clock starts at zero when the system is booted and runs continuously and @@ -2370,6 +2370,31 @@ that used it. It was originally scheduled for removal in 2.6.35. </listitem> </orderedlist> </section> + <section> + <title>V4L2 in Linux 3.2</title> + <orderedlist> + <listitem> + <para>V4L2_CTRL_FLAG_VOLATILE was added to signal volatile controls to userspace.</para> + </listitem> + <listitem> + <para>Add selection API for extended control over cropping and +composing. Does not affect the compatibility of current drivers and +applications. See <link linkend="selection-api"> selection API </link> for +details.</para> + </listitem> + </orderedlist> + </section> + + <section> + <title>V4L2 in Linux 3.3</title> + <orderedlist> + <listitem> + <para>Added <constant>V4L2_CID_ALPHA_COMPONENT</constant> control + to the <link linkend="control">User controls class</link>. + </para> + </listitem> + </orderedlist> + </section> <section id="other"> <title>Relation of V4L2 to other Linux multimedia APIs</title> @@ -2478,6 +2503,12 @@ ioctls.</para> <listitem> <para>Flash API. <xref linkend="flash-controls" /></para> </listitem> + <listitem> + <para>&VIDIOC-CREATE-BUFS; and &VIDIOC-PREPARE-BUF; ioctls.</para> + </listitem> + <listitem> + <para>Selection API. <xref linkend="selection-api" /></para> + </listitem> </itemizedlist> </section> @@ -2496,11 +2527,3 @@ interfaces and should not be implemented in new drivers.</para> </itemizedlist> </section> </section> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/controls.xml b/Documentation/DocBook/media/v4l/controls.xml index 23fdf79f8cf3..a1be37897ad7 100644 --- a/Documentation/DocBook/media/v4l/controls.xml +++ b/Documentation/DocBook/media/v4l/controls.xml @@ -232,8 +232,9 @@ control is deprecated. New drivers and applications should use the <entry>Enables a power line frequency filter to avoid flicker. Possible values for <constant>enum v4l2_power_line_frequency</constant> are: <constant>V4L2_CID_POWER_LINE_FREQUENCY_DISABLED</constant> (0), -<constant>V4L2_CID_POWER_LINE_FREQUENCY_50HZ</constant> (1) and -<constant>V4L2_CID_POWER_LINE_FREQUENCY_60HZ</constant> (2).</entry> +<constant>V4L2_CID_POWER_LINE_FREQUENCY_50HZ</constant> (1), +<constant>V4L2_CID_POWER_LINE_FREQUENCY_60HZ</constant> (2) and +<constant>V4L2_CID_POWER_LINE_FREQUENCY_AUTO</constant> (3).</entry> </row> <row> <entry><constant>V4L2_CID_HUE_AUTO</constant></entry> @@ -323,12 +324,6 @@ minimum value disables backlight compensation.</entry> (usually a microscope).</entry> </row> <row> - <entry><constant>V4L2_CID_LASTP1</constant></entry> - <entry></entry> - <entry>End of the predefined control IDs (currently -<constant>V4L2_CID_ILLUMINATORS_2</constant> + 1).</entry> - </row> - <row> <entry><constant>V4L2_CID_MIN_BUFFERS_FOR_CAPTURE</constant></entry> <entry>integer</entry> <entry>This is a read-only control that can be read by the application @@ -344,6 +339,25 @@ and used as a hint to determine the number of OUTPUT buffers to pass to REQBUFS. The value is the minimum number of OUTPUT buffers that is necessary for hardware to work.</entry> </row> + <row id="v4l2-alpha-component"> + <entry><constant>V4L2_CID_ALPHA_COMPONENT</constant></entry> + <entry>integer</entry> + <entry> Sets the alpha color component on the capture device or on + the capture buffer queue of a mem-to-mem device. When a mem-to-mem + device produces frame format that includes an alpha component + (e.g. <link linkend="rgb-formats">packed RGB image formats</link>) + and the alpha value is not defined by the mem-to-mem input data + this control lets you select the alpha component value of all + pixels. It is applicable to any pixel format that contains an alpha + component. + </entry> + </row> + <row> + <entry><constant>V4L2_CID_LASTP1</constant></entry> + <entry></entry> + <entry>End of the predefined control IDs (currently + <constant>V4L2_CID_ALPHA_COMPONENT</constant> + 1).</entry> + </row> <row> <entry><constant>V4L2_CID_PRIVATE_BASE</constant></entry> <entry></entry> @@ -3328,6 +3342,16 @@ interface and may change in the future.</para> <entry>The short circuit protection of the flash controller has been triggered.</entry> </row> + <row> + <entry><constant>V4L2_FLASH_FAULT_OVER_CURRENT</constant></entry> + <entry>Current in the LED power supply has exceeded the limit + specific to the flash controller.</entry> + </row> + <row> + <entry><constant>V4L2_FLASH_FAULT_INDICATOR</constant></entry> + <entry>The flash controller has detected a short or open + circuit condition on the indicator LED.</entry> + </row> </tbody> </entrytbl> </row> @@ -3356,11 +3380,3 @@ interface and may change in the future.</para> </section> </section> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "common.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/dev-capture.xml b/Documentation/DocBook/media/v4l/dev-capture.xml index 2237c661f26a..e1c5f9406d6a 100644 --- a/Documentation/DocBook/media/v4l/dev-capture.xml +++ b/Documentation/DocBook/media/v4l/dev-capture.xml @@ -108,11 +108,3 @@ linkend="mmap">memory mapping</link> or <link linkend="userp">user pointer</link>) I/O. See <xref linkend="io" /> for details.</para> </section> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/dev-codec.xml b/Documentation/DocBook/media/v4l/dev-codec.xml index 6e156dc45b94..dca0ecd54dc6 100644 --- a/Documentation/DocBook/media/v4l/dev-codec.xml +++ b/Documentation/DocBook/media/v4l/dev-codec.xml @@ -16,11 +16,3 @@ Applications send data to be converted to the driver through a I/O.</para> <para>[to do]</para> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/dev-effect.xml b/Documentation/DocBook/media/v4l/dev-effect.xml index 9c243beba0e6..2350a67c0710 100644 --- a/Documentation/DocBook/media/v4l/dev-effect.xml +++ b/Documentation/DocBook/media/v4l/dev-effect.xml @@ -15,11 +15,3 @@ receive the result data either with &func-read; and &func-write; functions, or through the streaming I/O mechanism.</para> <para>[to do]</para> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/dev-event.xml b/Documentation/DocBook/media/v4l/dev-event.xml index f14ae3fe107c..19f4becfae34 100644 --- a/Documentation/DocBook/media/v4l/dev-event.xml +++ b/Documentation/DocBook/media/v4l/dev-event.xml @@ -41,11 +41,3 @@ intermediate step leading up to that information. See the documentation for the event you want to subscribe to whether this is applicable for that event or not.</para> </listitem> </orderedlist></para> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/dev-osd.xml b/Documentation/DocBook/media/v4l/dev-osd.xml index c9a68a2ccd33..479d9433869a 100644 --- a/Documentation/DocBook/media/v4l/dev-osd.xml +++ b/Documentation/DocBook/media/v4l/dev-osd.xml @@ -154,11 +154,3 @@ data flow. For more information see <xref linkend="crop" />.</para> however the framebuffer interface of the driver may support the <constant>FBIOBLANK</constant> ioctl.</para> </section> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/dev-output.xml b/Documentation/DocBook/media/v4l/dev-output.xml index 919e22c53854..9130a3dc7880 100644 --- a/Documentation/DocBook/media/v4l/dev-output.xml +++ b/Documentation/DocBook/media/v4l/dev-output.xml @@ -104,11 +104,3 @@ linkend="mmap">memory mapping</link> or <link linkend="userp">user pointer</link>) I/O. See <xref linkend="io" /> for details.</para> </section> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/dev-overlay.xml b/Documentation/DocBook/media/v4l/dev-overlay.xml index 92513cf79150..40d1d7681439 100644 --- a/Documentation/DocBook/media/v4l/dev-overlay.xml +++ b/Documentation/DocBook/media/v4l/dev-overlay.xml @@ -369,11 +369,3 @@ reasons. <!-- video4linux-list@redhat.com on 22 Oct 2002 subject <para>To start or stop the frame buffer overlay applications call the &VIDIOC-OVERLAY; ioctl.</para> </section> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/dev-radio.xml b/Documentation/DocBook/media/v4l/dev-radio.xml index 73aa90b45b34..3e6ac73b36af 100644 --- a/Documentation/DocBook/media/v4l/dev-radio.xml +++ b/Documentation/DocBook/media/v4l/dev-radio.xml @@ -47,11 +47,3 @@ depending on the selected frequency. The &VIDIOC-G-TUNER; or &VIDIOC-G-MODULATOR; ioctl reports the supported frequency range.</para> </section> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/dev-raw-vbi.xml b/Documentation/DocBook/media/v4l/dev-raw-vbi.xml index c5a70bdfaf27..b788c72c885e 100644 --- a/Documentation/DocBook/media/v4l/dev-raw-vbi.xml +++ b/Documentation/DocBook/media/v4l/dev-raw-vbi.xml @@ -337,11 +337,3 @@ an &EBUSY; if the required hardware resources are temporarily unavailable, for example the device is already in use by another process.</para> </section> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/dev-rds.xml b/Documentation/DocBook/media/v4l/dev-rds.xml index 2427f54397e7..38883a419e65 100644 --- a/Documentation/DocBook/media/v4l/dev-rds.xml +++ b/Documentation/DocBook/media/v4l/dev-rds.xml @@ -29,10 +29,10 @@ returned by the &VIDIOC-QUERYCAP; ioctl. Any tuner that supports RDS will set the <constant>V4L2_TUNER_CAP_RDS</constant> flag in the <structfield>capability</structfield> field of &v4l2-tuner;. If the driver only passes RDS blocks without interpreting the data -the <constant>V4L2_TUNER_SUB_RDS_BLOCK_IO</constant> flag has to be +the <constant>V4L2_TUNER_CAP_RDS_BLOCK_IO</constant> flag has to be set, see <link linkend="reading-rds-data">Reading RDS data</link>. For future use the -flag <constant>V4L2_TUNER_SUB_RDS_CONTROLS</constant> has also been +flag <constant>V4L2_TUNER_CAP_RDS_CONTROLS</constant> has also been defined. However, a driver for a radio tuner with this capability does not yet exist, so if you are planning to write such a driver you should discuss this on the linux-media mailing list: &v4l-ml;.</para> @@ -52,9 +52,9 @@ field of &v4l2-modulator;. In order to enable the RDS transmission one must set the <constant>V4L2_TUNER_SUB_RDS</constant> bit in the <structfield>txsubchans</structfield> field of &v4l2-modulator;. If the driver only passes RDS blocks without interpreting the data -the <constant>V4L2_TUNER_SUB_RDS_BLOCK_IO</constant> flag has to be set. If the +the <constant>V4L2_TUNER_CAP_RDS_BLOCK_IO</constant> flag has to be set. If the tuner is capable of handling RDS entities like program identification codes and radio -text, the flag <constant>V4L2_TUNER_SUB_RDS_CONTROLS</constant> should be set, +text, the flag <constant>V4L2_TUNER_CAP_RDS_CONTROLS</constant> should be set, see <link linkend="writing-rds-data">Writing RDS data</link> and <link linkend="fm-tx-controls">FM Transmitter Control Reference</link>.</para> </section> @@ -194,11 +194,3 @@ as follows:</para> </tgroup> </table> </section> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/dev-sliced-vbi.xml b/Documentation/DocBook/media/v4l/dev-sliced-vbi.xml index 69e789fa7f7b..548f8ea28dee 100644 --- a/Documentation/DocBook/media/v4l/dev-sliced-vbi.xml +++ b/Documentation/DocBook/media/v4l/dev-sliced-vbi.xml @@ -697,12 +697,3 @@ Sliced VBI services</link> for a description of the line payload.</entry> </section> </section> - - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/dev-subdev.xml b/Documentation/DocBook/media/v4l/dev-subdev.xml index 05c8fefcbcbe..0916a7343a16 100644 --- a/Documentation/DocBook/media/v4l/dev-subdev.xml +++ b/Documentation/DocBook/media/v4l/dev-subdev.xml @@ -266,7 +266,7 @@ <para>When satisfied with the try results, applications can set the active formats by setting the <structfield>which</structfield> argument to - <constant>V4L2_SUBDEV_FORMAT_TRY</constant>. Active formats are changed + <constant>V4L2_SUBDEV_FORMAT_ACTIVE</constant>. Active formats are changed exactly as try formats by drivers. To avoid modifying the hardware state during format negotiation, applications should negotiate try formats first and then modify the active settings using the try formats returned during diff --git a/Documentation/DocBook/media/v4l/dev-teletext.xml b/Documentation/DocBook/media/v4l/dev-teletext.xml index 414b1cfff9f4..bd21c64d70f3 100644 --- a/Documentation/DocBook/media/v4l/dev-teletext.xml +++ b/Documentation/DocBook/media/v4l/dev-teletext.xml @@ -27,11 +27,3 @@ kernel 2.6.37.</para> <para>Modern devices all use the <link linkend="raw-vbi">raw</link> or <link linkend="sliced">sliced</link> VBI API.</para> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/driver.xml b/Documentation/DocBook/media/v4l/driver.xml index 1f7eea5c4ec3..eacafe312cd2 100644 --- a/Documentation/DocBook/media/v4l/driver.xml +++ b/Documentation/DocBook/media/v4l/driver.xml @@ -198,11 +198,3 @@ devices with the videodev module.</para> <para>to do</para> </section> --> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/func-close.xml b/Documentation/DocBook/media/v4l/func-close.xml index dfb41cbbbec3..232920d2f3c6 100644 --- a/Documentation/DocBook/media/v4l/func-close.xml +++ b/Documentation/DocBook/media/v4l/func-close.xml @@ -60,11 +60,3 @@ descriptor.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/func-ioctl.xml b/Documentation/DocBook/media/v4l/func-ioctl.xml index 2de64be706f5..4394184a1a6d 100644 --- a/Documentation/DocBook/media/v4l/func-ioctl.xml +++ b/Documentation/DocBook/media/v4l/func-ioctl.xml @@ -69,11 +69,3 @@ their respective function and parameters are specified in <xref the parameter remains unmodified.</para> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/func-mmap.xml b/Documentation/DocBook/media/v4l/func-mmap.xml index 786732b64bbd..f31ad71bf301 100644 --- a/Documentation/DocBook/media/v4l/func-mmap.xml +++ b/Documentation/DocBook/media/v4l/func-mmap.xml @@ -181,11 +181,3 @@ complete the request.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/func-munmap.xml b/Documentation/DocBook/media/v4l/func-munmap.xml index e2c4190f9bb6..860d49ca54a5 100644 --- a/Documentation/DocBook/media/v4l/func-munmap.xml +++ b/Documentation/DocBook/media/v4l/func-munmap.xml @@ -74,11 +74,3 @@ mapped yet.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/func-open.xml b/Documentation/DocBook/media/v4l/func-open.xml index 7595d07a8c72..cf64e207c3ee 100644 --- a/Documentation/DocBook/media/v4l/func-open.xml +++ b/Documentation/DocBook/media/v4l/func-open.xml @@ -111,11 +111,3 @@ system has been reached.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/func-poll.xml b/Documentation/DocBook/media/v4l/func-poll.xml index ec3c718f5963..85cad8bff5ba 100644 --- a/Documentation/DocBook/media/v4l/func-poll.xml +++ b/Documentation/DocBook/media/v4l/func-poll.xml @@ -117,11 +117,3 @@ than <constant>OPEN_MAX</constant>.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/func-read.xml b/Documentation/DocBook/media/v4l/func-read.xml index a5089bf8873d..e218bbfbd362 100644 --- a/Documentation/DocBook/media/v4l/func-read.xml +++ b/Documentation/DocBook/media/v4l/func-read.xml @@ -179,11 +179,3 @@ type of device.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/func-select.xml b/Documentation/DocBook/media/v4l/func-select.xml index b6713623181f..e12a60d9bd85 100644 --- a/Documentation/DocBook/media/v4l/func-select.xml +++ b/Documentation/DocBook/media/v4l/func-select.xml @@ -128,11 +128,3 @@ zero or greater than <constant>FD_SETSIZE</constant>.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/func-write.xml b/Documentation/DocBook/media/v4l/func-write.xml index 2c09c09371c3..575207885726 100644 --- a/Documentation/DocBook/media/v4l/func-write.xml +++ b/Documentation/DocBook/media/v4l/func-write.xml @@ -126,11 +126,3 @@ type of device.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/io.xml b/Documentation/DocBook/media/v4l/io.xml index c57d1ec6291c..b815929b5bba 100644 --- a/Documentation/DocBook/media/v4l/io.xml +++ b/Documentation/DocBook/media/v4l/io.xml @@ -927,6 +927,33 @@ ioctl is called.</entry> Applications set or clear this flag before calling the <constant>VIDIOC_QBUF</constant> ioctl.</entry> </row> + <row> + <entry><constant>V4L2_BUF_FLAG_PREPARED</constant></entry> + <entry>0x0400</entry> + <entry>The buffer has been prepared for I/O and can be queued by the +application. Drivers set or clear this flag when the +<link linkend="vidioc-querybuf">VIDIOC_QUERYBUF</link>, <link + linkend="vidioc-qbuf">VIDIOC_PREPARE_BUF</link>, <link + linkend="vidioc-qbuf">VIDIOC_QBUF</link> or <link + linkend="vidioc-qbuf">VIDIOC_DQBUF</link> ioctl is called.</entry> + </row> + <row> + <entry><constant>V4L2_BUF_FLAG_NO_CACHE_INVALIDATE</constant></entry> + <entry>0x0400</entry> + <entry>Caches do not have to be invalidated for this buffer. +Typically applications shall use this flag if the data captured in the buffer +is not going to be touched by the CPU, instead the buffer will, probably, be +passed on to a DMA-capable hardware unit for further processing or output. +</entry> + </row> + <row> + <entry><constant>V4L2_BUF_FLAG_NO_CACHE_CLEAN</constant></entry> + <entry>0x0800</entry> + <entry>Caches do not have to be cleaned for this buffer. +Typically applications shall use this flag for output buffers if the data +in this buffer has not been created by the CPU but by some DMA-capable unit, +in which case caches have not been used.</entry> + </row> </tbody> </tgroup> </table> @@ -1255,11 +1282,3 @@ line, top field first. The bottom field is transmitted first.</entry> </mediaobject> </figure> </section> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/libv4l.xml b/Documentation/DocBook/media/v4l/libv4l.xml index 3cb10ec51929..d3b71e20003c 100644 --- a/Documentation/DocBook/media/v4l/libv4l.xml +++ b/Documentation/DocBook/media/v4l/libv4l.xml @@ -158,10 +158,3 @@ still don't use libv4l.</para> </section> </section> -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/pixfmt-grey.xml b/Documentation/DocBook/media/v4l/pixfmt-grey.xml index 3b72bc6b2de7..bee970d3f76d 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-grey.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-grey.xml @@ -60,11 +60,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-m420.xml b/Documentation/DocBook/media/v4l/pixfmt-m420.xml index ce4bc019e5c0..aadae92c5d04 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-m420.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-m420.xml @@ -137,11 +137,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-nv12.xml b/Documentation/DocBook/media/v4l/pixfmt-nv12.xml index 873f67035181..84dd4fd7cb80 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-nv12.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-nv12.xml @@ -141,11 +141,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-nv12m.xml b/Documentation/DocBook/media/v4l/pixfmt-nv12m.xml index c9e166d9ded8..3fd3ce5df270 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-nv12m.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-nv12m.xml @@ -144,11 +144,3 @@ CbCr plane has as many pad bytes after its rows.</para> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-nv12mt.xml b/Documentation/DocBook/media/v4l/pixfmt-nv12mt.xml index 7a2855a526c1..2f82b1da8dfe 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-nv12mt.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-nv12mt.xml @@ -64,11 +64,3 @@ layout of macroblocks</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-nv16.xml b/Documentation/DocBook/media/v4l/pixfmt-nv16.xml index 26094035fc04..8ae1f8a810d0 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-nv16.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-nv16.xml @@ -164,11 +164,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-nv24.xml b/Documentation/DocBook/media/v4l/pixfmt-nv24.xml new file mode 100644 index 000000000000..fb255f2ca9dd --- /dev/null +++ b/Documentation/DocBook/media/v4l/pixfmt-nv24.xml @@ -0,0 +1,121 @@ + <refentry> + <refmeta> + <refentrytitle>V4L2_PIX_FMT_NV24 ('NV24'), V4L2_PIX_FMT_NV42 ('NV42')</refentrytitle> + &manvol; + </refmeta> + <refnamediv> + <refname id="V4L2-PIX-FMT-NV24"><constant>V4L2_PIX_FMT_NV24</constant></refname> + <refname id="V4L2-PIX-FMT-NV42"><constant>V4L2_PIX_FMT_NV42</constant></refname> + <refpurpose>Formats with full horizontal and vertical +chroma resolutions, also known as YUV 4:4:4. One luminance and one +chrominance plane with alternating chroma samples as opposed to +<constant>V4L2_PIX_FMT_YVU420</constant></refpurpose> + </refnamediv> + <refsect1> + <title>Description</title> + + <para>These are two-plane versions of the YUV 4:4:4 format. The three + components are separated into two sub-images or planes. The Y plane is + first, with each Y sample stored in one byte per pixel. For + <constant>V4L2_PIX_FMT_NV24</constant>, a combined CbCr plane + immediately follows the Y plane in memory. The CbCr plane has the same + width and height, in pixels, as the Y plane (and the image). Each line + contains one CbCr pair per pixel, with each Cb and Cr sample stored in + one byte. <constant>V4L2_PIX_FMT_NV42</constant> is the same except that + the Cb and Cr samples are swapped, the CrCb plane starts with a Cr + sample.</para> + + <para>If the Y plane has pad bytes after each row, then the CbCr plane + has twice as many pad bytes after its rows.</para> + + <example> + <title><constant>V4L2_PIX_FMT_NV24</constant> 4 × 4 +pixel image</title> + + <formalpara> + <title>Byte Order.</title> + <para>Each cell is one byte. + <informaltable frame="none"> + <tgroup cols="9" align="center"> + <colspec align="left" colwidth="2*" /> + <tbody valign="top"> + <row> + <entry>start + 0:</entry> + <entry>Y'<subscript>00</subscript></entry> + <entry>Y'<subscript>01</subscript></entry> + <entry>Y'<subscript>02</subscript></entry> + <entry>Y'<subscript>03</subscript></entry> + </row> + <row> + <entry>start + 4:</entry> + <entry>Y'<subscript>10</subscript></entry> + <entry>Y'<subscript>11</subscript></entry> + <entry>Y'<subscript>12</subscript></entry> + <entry>Y'<subscript>13</subscript></entry> + </row> + <row> + <entry>start + 8:</entry> + <entry>Y'<subscript>20</subscript></entry> + <entry>Y'<subscript>21</subscript></entry> + <entry>Y'<subscript>22</subscript></entry> + <entry>Y'<subscript>23</subscript></entry> + </row> + <row> + <entry>start + 12:</entry> + <entry>Y'<subscript>30</subscript></entry> + <entry>Y'<subscript>31</subscript></entry> + <entry>Y'<subscript>32</subscript></entry> + <entry>Y'<subscript>33</subscript></entry> + </row> + <row> + <entry>start + 16:</entry> + <entry>Cb<subscript>00</subscript></entry> + <entry>Cr<subscript>00</subscript></entry> + <entry>Cb<subscript>01</subscript></entry> + <entry>Cr<subscript>01</subscript></entry> + <entry>Cb<subscript>02</subscript></entry> + <entry>Cr<subscript>02</subscript></entry> + <entry>Cb<subscript>03</subscript></entry> + <entry>Cr<subscript>03</subscript></entry> + </row> + <row> + <entry>start + 24:</entry> + <entry>Cb<subscript>10</subscript></entry> + <entry>Cr<subscript>10</subscript></entry> + <entry>Cb<subscript>11</subscript></entry> + <entry>Cr<subscript>11</subscript></entry> + <entry>Cb<subscript>12</subscript></entry> + <entry>Cr<subscript>12</subscript></entry> + <entry>Cb<subscript>13</subscript></entry> + <entry>Cr<subscript>13</subscript></entry> + </row> + <row> + <entry>start + 32:</entry> + <entry>Cb<subscript>20</subscript></entry> + <entry>Cr<subscript>20</subscript></entry> + <entry>Cb<subscript>21</subscript></entry> + <entry>Cr<subscript>21</subscript></entry> + <entry>Cb<subscript>22</subscript></entry> + <entry>Cr<subscript>22</subscript></entry> + <entry>Cb<subscript>23</subscript></entry> + <entry>Cr<subscript>23</subscript></entry> + </row> + <row> + <entry>start + 40:</entry> + <entry>Cb<subscript>30</subscript></entry> + <entry>Cr<subscript>30</subscript></entry> + <entry>Cb<subscript>31</subscript></entry> + <entry>Cr<subscript>31</subscript></entry> + <entry>Cb<subscript>32</subscript></entry> + <entry>Cr<subscript>32</subscript></entry> + <entry>Cb<subscript>33</subscript></entry> + <entry>Cr<subscript>33</subscript></entry> + </row> + </tbody> + </tgroup> + </informaltable> + </para> + </formalpara> + </example> + </refsect1> + </refentry> diff --git a/Documentation/DocBook/media/v4l/pixfmt-packed-rgb.xml b/Documentation/DocBook/media/v4l/pixfmt-packed-rgb.xml index 4db272b8a0d3..166c8d65e4f7 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-packed-rgb.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-packed-rgb.xml @@ -428,8 +428,11 @@ colorspace <constant>V4L2_COLORSPACE_SRGB</constant>.</para> <para>Bit 7 is the most significant bit. The value of a = alpha bits is undefined when reading from the driver, ignored when writing to the driver, except when alpha blending has been negotiated for a -<link linkend="overlay">Video Overlay</link> or <link -linkend="osd">Video Output Overlay</link>.</para> +<link linkend="overlay">Video Overlay</link> or <link linkend="osd"> +Video Output Overlay</link> or when alpha component has been configured +for a <link linkend="capture">Video Capture</link> by means of <link +linkend="v4l2-alpha-component"> <constant>V4L2_CID_ALPHA_COMPONENT +</constant> </link> control.</para> <example> <title><constant>V4L2_PIX_FMT_BGR24</constant> 4 × 4 pixel @@ -930,11 +933,3 @@ See &v4l-dvb; for access instructions.</para> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-packed-yuv.xml b/Documentation/DocBook/media/v4l/pixfmt-packed-yuv.xml index 3cab5d0ca75d..33fa5a47a865 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-packed-yuv.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-packed-yuv.xml @@ -234,11 +234,3 @@ linkend="osd">Video Output Overlay</link>.</para> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-sbggr16.xml b/Documentation/DocBook/media/v4l/pixfmt-sbggr16.xml index 519a9efbac10..6494b05d84a1 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-sbggr16.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-sbggr16.xml @@ -81,11 +81,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-sbggr8.xml b/Documentation/DocBook/media/v4l/pixfmt-sbggr8.xml index 5fe84ecc2ebe..5eaf2b42d3f7 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-sbggr8.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-sbggr8.xml @@ -65,11 +65,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-sgbrg8.xml b/Documentation/DocBook/media/v4l/pixfmt-sgbrg8.xml index d67a472b0880..fee65dca79c5 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-sgbrg8.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-sgbrg8.xml @@ -65,11 +65,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-sgrbg8.xml b/Documentation/DocBook/media/v4l/pixfmt-sgrbg8.xml index 0cdf13b8ac1c..19727ab4c757 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-sgrbg8.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-sgrbg8.xml @@ -65,11 +65,3 @@ columns and rows.</para> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-uyvy.xml b/Documentation/DocBook/media/v4l/pixfmt-uyvy.xml index 816c8d467c16..b1f6801a17ff 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-uyvy.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-uyvy.xml @@ -118,11 +118,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-vyuy.xml b/Documentation/DocBook/media/v4l/pixfmt-vyuy.xml index 61f12a5e68d9..82803408b389 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-vyuy.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-vyuy.xml @@ -118,11 +118,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-y16.xml b/Documentation/DocBook/media/v4l/pixfmt-y16.xml index d58404015078..ff4f727d5624 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-y16.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-y16.xml @@ -79,11 +79,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-y41p.xml b/Documentation/DocBook/media/v4l/pixfmt-y41p.xml index 73c8536efb05..98dcb91d2917 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-y41p.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-y41p.xml @@ -147,11 +147,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-yuv410.xml b/Documentation/DocBook/media/v4l/pixfmt-yuv410.xml index 8eb4a193d770..0869dce5f92c 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-yuv410.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-yuv410.xml @@ -131,11 +131,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-yuv411p.xml b/Documentation/DocBook/media/v4l/pixfmt-yuv411p.xml index 00e0960a9869..086dc731bf02 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-yuv411p.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-yuv411p.xml @@ -145,11 +145,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-yuv420.xml b/Documentation/DocBook/media/v4l/pixfmt-yuv420.xml index 42d7de5e456d..48649fac1596 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-yuv420.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-yuv420.xml @@ -147,11 +147,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-yuv420m.xml b/Documentation/DocBook/media/v4l/pixfmt-yuv420m.xml index f5d8f57495c8..9957863daf18 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-yuv420m.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-yuv420m.xml @@ -152,11 +152,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-yuv422p.xml b/Documentation/DocBook/media/v4l/pixfmt-yuv422p.xml index 4348bd9f0d01..4ce6463fe0a5 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-yuv422p.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-yuv422p.xml @@ -151,11 +151,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-yuyv.xml b/Documentation/DocBook/media/v4l/pixfmt-yuyv.xml index bdb2ffacbbcc..58384092251a 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-yuyv.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-yuyv.xml @@ -118,11 +118,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt-yvyu.xml b/Documentation/DocBook/media/v4l/pixfmt-yvyu.xml index 40d17ae39dde..bfffdc76d3da 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-yvyu.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-yvyu.xml @@ -118,11 +118,3 @@ pixel image</title> </example> </refsect1> </refentry> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "pixfmt.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/pixfmt.xml b/Documentation/DocBook/media/v4l/pixfmt.xml index 2ff6b7776d7f..31eaae2469f9 100644 --- a/Documentation/DocBook/media/v4l/pixfmt.xml +++ b/Documentation/DocBook/media/v4l/pixfmt.xml @@ -714,6 +714,7 @@ information.</para> &sub-nv12m; &sub-nv12mt; &sub-nv16; + &sub-nv24; &sub-m420; </section> @@ -890,6 +891,11 @@ kernel sources in the file <filename>Documentation/video4linux/cx2341x/README.hm <entry>'M310'</entry> <entry>Compressed BGGR Bayer format used by the gspca driver.</entry> </row> + <row id="V4L2-PIX-FMT-JL2005BCD"> + <entry><constant>V4L2_PIX_FMT_JL2005BCD</constant></entry> + <entry>'JL20'</entry> + <entry>JPEG compressed RGGB Bayer format used by the gspca driver.</entry> + </row> <row id="V4L2-PIX-FMT-OV511"> <entry><constant>V4L2_PIX_FMT_OV511</constant></entry> <entry>'O511'</entry> @@ -997,11 +1003,3 @@ the other bits are set to 0.</entry> </tgroup> </table> </section> - - <!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: - --> diff --git a/Documentation/DocBook/media/v4l/selection-api.xml b/Documentation/DocBook/media/v4l/selection-api.xml new file mode 100644 index 000000000000..2f0bdb4d5551 --- /dev/null +++ b/Documentation/DocBook/media/v4l/selection-api.xml @@ -0,0 +1,321 @@ +<section id="selection-api"> + + <title>Experimental API for cropping, composing and scaling</title> + + <note> + <title>Experimental</title> + + <para>This is an <link linkend="experimental">experimental</link> +interface and may change in the future.</para> + </note> + + <section> + <title>Introduction</title> + +<para>Some video capture devices can sample a subsection of a picture and +shrink or enlarge it to an image of arbitrary size. Next, the devices can +insert the image into larger one. Some video output devices can crop part of an +input image, scale it up or down and insert it at an arbitrary scan line and +horizontal offset into a video signal. We call these abilities cropping, +scaling and composing.</para> + +<para>On a video <emphasis>capture</emphasis> device the source is a video +signal, and the cropping target determine the area actually sampled. The sink +is an image stored in a memory buffer. The composing area specifies which part +of the buffer is actually written to by the hardware. </para> + +<para>On a video <emphasis>output</emphasis> device the source is an image in a +memory buffer, and the cropping target is a part of an image to be shown on a +display. The sink is the display or the graphics screen. The application may +select the part of display where the image should be displayed. The size and +position of such a window is controlled by the compose target.</para> + +<para>Rectangles for all cropping and composing targets are defined even if the +device does supports neither cropping nor composing. Their size and position +will be fixed in such a case. If the device does not support scaling then the +cropping and composing rectangles have the same size.</para> + + </section> + + <section> + <title>Selection targets</title> + + <figure id="sel-targets-capture"> + <title>Cropping and composing targets</title> + <mediaobject> + <imageobject> + <imagedata fileref="selection.png" format="PNG" /> + </imageobject> + <textobject> + <phrase>Targets used by a cropping, composing and scaling + process</phrase> + </textobject> + </mediaobject> + </figure> + </section> + + <section> + + <title>Configuration</title> + +<para>Applications can use the <link linkend="vidioc-g-selection">selection +API</link> to select an area in a video signal or a buffer, and to query for +default settings and hardware limits.</para> + +<para>Video hardware can have various cropping, composing and scaling +limitations. It may only scale up or down, support only discrete scaling +factors, or have different scaling abilities in the horizontal and vertical +directions. Also it may not support scaling at all. At the same time the +cropping/composing rectangles may have to be aligned, and both the source and +the sink may have arbitrary upper and lower size limits. Therefore, as usual, +drivers are expected to adjust the requested parameters and return the actual +values selected. An application can control the rounding behaviour using <link +linkend="v4l2-sel-flags"> constraint flags </link>.</para> + + <section> + + <title>Configuration of video capture</title> + +<para>See figure <xref linkend="sel-targets-capture" /> for examples of the +selection targets available for a video capture device. It is recommended to +configure the cropping targets before to the composing targets.</para> + +<para>The range of coordinates of the top left corner, width and height of +areas that can be sampled is given by the <constant> V4L2_SEL_TGT_CROP_BOUNDS +</constant> target. It is recommended for the driver developers to put the +top/left corner at position <constant> (0,0) </constant>. The rectangle's +coordinates are expressed in pixels.</para> + +<para>The top left corner, width and height of the source rectangle, that is +the area actually sampled, is given by the <constant> V4L2_SEL_TGT_CROP_ACTIVE +</constant> target. It uses the same coordinate system as <constant> +V4L2_SEL_TGT_CROP_BOUNDS </constant>. The active cropping area must lie +completely inside the capture boundaries. The driver may further adjust the +requested size and/or position according to hardware limitations.</para> + +<para>Each capture device has a default source rectangle, given by the +<constant> V4L2_SEL_TGT_CROP_DEFAULT </constant> target. This rectangle shall +over what the driver writer considers the complete picture. Drivers shall set +the active crop rectangle to the default when the driver is first loaded, but +not later.</para> + +<para>The composing targets refer to a memory buffer. The limits of composing +coordinates are obtained using <constant> V4L2_SEL_TGT_COMPOSE_BOUNDS +</constant>. All coordinates are expressed in pixels. The rectangle's top/left +corner must be located at position <constant> (0,0) </constant>. The width and +height are equal to the image size set by <constant> VIDIOC_S_FMT </constant>. +</para> + +<para>The part of a buffer into which the image is inserted by the hardware is +controlled by the <constant> V4L2_SEL_TGT_COMPOSE_ACTIVE </constant> target. +The rectangle's coordinates are also expressed in the same coordinate system as +the bounds rectangle. The composing rectangle must lie completely inside bounds +rectangle. The driver must adjust the composing rectangle to fit to the +bounding limits. Moreover, the driver can perform other adjustments according +to hardware limitations. The application can control rounding behaviour using +<link linkend="v4l2-sel-flags"> constraint flags </link>.</para> + +<para>For capture devices the default composing rectangle is queried using +<constant> V4L2_SEL_TGT_COMPOSE_DEFAULT </constant>. It is usually equal to the +bounding rectangle.</para> + +<para>The part of a buffer that is modified by the hardware is given by +<constant> V4L2_SEL_TGT_COMPOSE_PADDED </constant>. It contains all pixels +defined using <constant> V4L2_SEL_TGT_COMPOSE_ACTIVE </constant> plus all +padding data modified by hardware during insertion process. All pixels outside +this rectangle <emphasis>must not</emphasis> be changed by the hardware. The +content of pixels that lie inside the padded area but outside active area is +undefined. The application can use the padded and active rectangles to detect +where the rubbish pixels are located and remove them if needed.</para> + + </section> + + <section> + + <title>Configuration of video output</title> + +<para>For output devices targets and ioctls are used similarly to the video +capture case. The <emphasis> composing </emphasis> rectangle refers to the +insertion of an image into a video signal. The cropping rectangles refer to a +memory buffer. It is recommended to configure the composing targets before to +the cropping targets.</para> + +<para>The cropping targets refer to the memory buffer that contains an image to +be inserted into a video signal or graphical screen. The limits of cropping +coordinates are obtained using <constant> V4L2_SEL_TGT_CROP_BOUNDS </constant>. +All coordinates are expressed in pixels. The top/left corner is always point +<constant> (0,0) </constant>. The width and height is equal to the image size +specified using <constant> VIDIOC_S_FMT </constant> ioctl.</para> + +<para>The top left corner, width and height of the source rectangle, that is +the area from which image date are processed by the hardware, is given by the +<constant> V4L2_SEL_TGT_CROP_ACTIVE </constant>. Its coordinates are expressed +in in the same coordinate system as the bounds rectangle. The active cropping +area must lie completely inside the crop boundaries and the driver may further +adjust the requested size and/or position according to hardware +limitations.</para> + +<para>For output devices the default cropping rectangle is queried using +<constant> V4L2_SEL_TGT_CROP_DEFAULT </constant>. It is usually equal to the +bounding rectangle.</para> + +<para>The part of a video signal or graphics display where the image is +inserted by the hardware is controlled by <constant> +V4L2_SEL_TGT_COMPOSE_ACTIVE </constant> target. The rectangle's coordinates +are expressed in pixels. The composing rectangle must lie completely inside the +bounds rectangle. The driver must adjust the area to fit to the bounding +limits. Moreover, the driver can perform other adjustments according to +hardware limitations. </para> + +<para>The device has a default composing rectangle, given by the <constant> +V4L2_SEL_TGT_COMPOSE_DEFAULT </constant> target. This rectangle shall cover what +the driver writer considers the complete picture. It is recommended for the +driver developers to put the top/left corner at position <constant> (0,0) +</constant>. Drivers shall set the active composing rectangle to the default +one when the driver is first loaded.</para> + +<para>The devices may introduce additional content to video signal other than +an image from memory buffers. It includes borders around an image. However, +such a padded area is driver-dependent feature not covered by this document. +Driver developers are encouraged to keep padded rectangle equal to active one. +The padded target is accessed by the <constant> V4L2_SEL_TGT_COMPOSE_PADDED +</constant> identifier. It must contain all pixels from the <constant> +V4L2_SEL_TGT_COMPOSE_ACTIVE </constant> target.</para> + + </section> + + <section> + + <title>Scaling control.</title> + +<para>An application can detect if scaling is performed by comparing the width +and the height of rectangles obtained using <constant> V4L2_SEL_TGT_CROP_ACTIVE +</constant> and <constant> V4L2_SEL_TGT_COMPOSE_ACTIVE </constant> targets. If +these are not equal then the scaling is applied. The application can compute +the scaling ratios using these values.</para> + + </section> + + </section> + + <section> + + <title>Comparison with old cropping API.</title> + +<para>The selection API was introduced to cope with deficiencies of previous +<link linkend="crop"> API </link>, that was designed to control simple capture +devices. Later the cropping API was adopted by video output drivers. The ioctls +are used to select a part of the display were the video signal is inserted. It +should be considered as an API abuse because the described operation is +actually the composing. The selection API makes a clear distinction between +composing and cropping operations by setting the appropriate targets. The V4L2 +API lacks any support for composing to and cropping from an image inside a +memory buffer. The application could configure a capture device to fill only a +part of an image by abusing V4L2 API. Cropping a smaller image from a larger +one is achieved by setting the field <structfield> +&v4l2-pix-format;::bytesperline </structfield>. Introducing an image offsets +could be done by modifying field <structfield> &v4l2-buffer;::m:userptr +</structfield> before calling <constant> VIDIOC_QBUF </constant>. Those +operations should be avoided because they are not portable (endianness), and do +not work for macroblock and Bayer formats and mmap buffers. The selection API +deals with configuration of buffer cropping/composing in a clear, intuitive and +portable way. Next, with the selection API the concepts of the padded target +and constraints flags are introduced. Finally, <structname> &v4l2-crop; +</structname> and <structname> &v4l2-cropcap; </structname> have no reserved +fields. Therefore there is no way to extend their functionality. The new +<structname> &v4l2-selection; </structname> provides a lot of place for future +extensions. Driver developers are encouraged to implement only selection API. +The former cropping API would be simulated using the new one. </para> + + </section> + + <section> + <title>Examples</title> + <example> + <title>Resetting the cropping parameters</title> + + <para>(A video capture device is assumed; change <constant> +V4L2_BUF_TYPE_VIDEO_CAPTURE </constant> for other devices; change target to +<constant> V4L2_SEL_TGT_COMPOSE_* </constant> family to configure composing +area)</para> + + <programlisting> + + &v4l2-selection; sel = { + .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, + .target = V4L2_SEL_TGT_CROP_DEFAULT, + }; + ret = ioctl(fd, &VIDIOC-G-SELECTION;, &sel); + if (ret) + exit(-1); + sel.target = V4L2_SEL_TGT_CROP_ACTIVE; + ret = ioctl(fd, &VIDIOC-S-SELECTION;, &sel); + if (ret) + exit(-1); + + </programlisting> + </example> + + <example> + <title>Simple downscaling</title> + <para>Setting a composing area on output of size of <emphasis> at most +</emphasis> half of limit placed at a center of a display.</para> + <programlisting> + + &v4l2-selection; sel = { + .type = V4L2_BUF_TYPE_VIDEO_OUTPUT, + .target = V4L2_SEL_TGT_COMPOSE_BOUNDS, + }; + struct v4l2_rect r; + + ret = ioctl(fd, &VIDIOC-G-SELECTION;, &sel); + if (ret) + exit(-1); + /* setting smaller compose rectangle */ + r.width = sel.r.width / 2; + r.height = sel.r.height / 2; + r.left = sel.r.width / 4; + r.top = sel.r.height / 4; + sel.r = r; + sel.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; + sel.flags = V4L2_SEL_FLAG_LE; + ret = ioctl(fd, &VIDIOC-S-SELECTION;, &sel); + if (ret) + exit(-1); + + </programlisting> + </example> + + <example> + <title>Querying for scaling factors</title> + <para>A video output device is assumed; change <constant> +V4L2_BUF_TYPE_VIDEO_OUTPUT </constant> for other devices</para> + <programlisting> + + &v4l2-selection; compose = { + .type = V4L2_BUF_TYPE_VIDEO_OUTPUT, + .target = V4L2_SEL_TGT_COMPOSE_ACTIVE, + }; + &v4l2-selection; crop = { + .type = V4L2_BUF_TYPE_VIDEO_OUTPUT, + .target = V4L2_SEL_TGT_CROP_ACTIVE, + }; + double hscale, vscale; + + ret = ioctl(fd, &VIDIOC-G-SELECTION;, &compose); + if (ret) + exit(-1); + ret = ioctl(fd, &VIDIOC-G-SELECTION;, &crop); + if (ret) + exit(-1); + + /* computing scaling factors */ + hscale = (double)compose.r.width / crop.r.width; + vscale = (double)compose.r.height / crop.r.height; + + </programlisting> + </example> + + </section> + +</section> diff --git a/Documentation/DocBook/media/v4l/v4l2.xml b/Documentation/DocBook/media/v4l/v4l2.xml index 0d05e8747c12..e97c512861bb 100644 --- a/Documentation/DocBook/media/v4l/v4l2.xml +++ b/Documentation/DocBook/media/v4l/v4l2.xml @@ -128,6 +128,13 @@ structs, ioctls) must be noted in more detail in the history chapter applications. --> <revision> + <revnumber>3.2</revnumber> + <date>2011-08-26</date> + <authorinitials>hv</authorinitials> + <revremark>Added V4L2_CTRL_FLAG_VOLATILE.</revremark> + </revision> + + <revision> <revnumber>3.1</revnumber> <date>2011-06-27</date> <authorinitials>mcc, po, hv</authorinitials> @@ -410,7 +417,7 @@ and discussions on the V4L mailing list.</revremark> </partinfo> <title>Video for Linux Two API Specification</title> - <subtitle>Revision 3.1</subtitle> + <subtitle>Revision 3.2</subtitle> <chapter id="common"> &sub-common; @@ -462,6 +469,7 @@ and discussions on the V4L mailing list.</revremark> &sub-close; &sub-ioctl; <!-- All ioctls go here. --> + &sub-create-bufs; &sub-cropcap; &sub-dbg-g-chip-ident; &sub-dbg-g-register; @@ -493,6 +501,7 @@ and discussions on the V4L mailing list.</revremark> &sub-g-output; &sub-g-parm; &sub-g-priority; + &sub-g-selection; &sub-g-sliced-vbi-cap; &sub-g-std; &sub-g-tuner; @@ -504,6 +513,7 @@ and discussions on the V4L mailing list.</revremark> &sub-queryctrl; &sub-query-dv-preset; &sub-querystd; + &sub-prepare-buf; &sub-reqbufs; &sub-s-hw-freq-seek; &sub-streamon; diff --git a/Documentation/DocBook/media/v4l/vidioc-create-bufs.xml b/Documentation/DocBook/media/v4l/vidioc-create-bufs.xml new file mode 100644 index 000000000000..73ae8a6cd004 --- /dev/null +++ b/Documentation/DocBook/media/v4l/vidioc-create-bufs.xml @@ -0,0 +1,139 @@ +<refentry id="vidioc-create-bufs"> + <refmeta> + <refentrytitle>ioctl VIDIOC_CREATE_BUFS</refentrytitle> + &manvol; + </refmeta> + + <refnamediv> + <refname>VIDIOC_CREATE_BUFS</refname> + <refpurpose>Create buffers for Memory Mapped or User Pointer I/O</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_create_buffers *<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_CREATE_BUFS</para> + </listitem> + </varlistentry> + <varlistentry> + <term><parameter>argp</parameter></term> + <listitem> + <para></para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>Description</title> + + <para>This ioctl is used to create buffers for <link linkend="mmap">memory +mapped</link> or <link linkend="userp">user pointer</link> +I/O. It can be used as an alternative or in addition to the +<constant>VIDIOC_REQBUFS</constant> ioctl, when a tighter control over buffers +is required. This ioctl can be called multiple times to create buffers of +different sizes.</para> + + <para>To allocate device buffers applications initialize relevant fields of +the <structname>v4l2_create_buffers</structname> structure. They set the +<structfield>type</structfield> field in the +<structname>v4l2_format</structname> structure, embedded in this +structure, to the respective stream or buffer type. +<structfield>count</structfield> must be set to the number of required buffers. +<structfield>memory</structfield> specifies the required I/O method. The +<structfield>format</structfield> field shall typically be filled in using +either the <constant>VIDIOC_TRY_FMT</constant> or +<constant>VIDIOC_G_FMT</constant> ioctl(). Additionally, applications can adjust +<structfield>sizeimage</structfield> fields to fit their specific needs. The +<structfield>reserved</structfield> array must be zeroed.</para> + + <para>When the ioctl is called with a pointer to this structure the driver +will attempt to allocate up to the requested number of buffers and store the +actual number allocated and the starting index in the +<structfield>count</structfield> and the <structfield>index</structfield> fields +respectively. On return <structfield>count</structfield> can be smaller than +the number requested. The driver may also increase buffer sizes if required, +however, it will not update <structfield>sizeimage</structfield> field values. +The user has to use <constant>VIDIOC_QUERYBUF</constant> to retrieve that +information.</para> + + <table pgwide="1" frame="none" id="v4l2-create-buffers"> + <title>struct <structname>v4l2_create_buffers</structname></title> + <tgroup cols="3"> + &cs-str; + <tbody valign="top"> + <row> + <entry>__u32</entry> + <entry><structfield>index</structfield></entry> + <entry>The starting buffer index, returned by the driver.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>count</structfield></entry> + <entry>The number of buffers requested or granted.</entry> + </row> + <row> + <entry>&v4l2-memory;</entry> + <entry><structfield>memory</structfield></entry> + <entry>Applications set this field to +<constant>V4L2_MEMORY_MMAP</constant> or +<constant>V4L2_MEMORY_USERPTR</constant>.</entry> + </row> + <row> + <entry>&v4l2-format;</entry> + <entry><structfield>format</structfield></entry> + <entry>Filled in by the application, preserved by the driver.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>reserved</structfield>[8]</entry> + <entry>A place holder for future extensions.</entry> + </row> + </tbody> + </tgroup> + </table> + </refsect1> + + <refsect1> + &return-value; + + <variablelist> + <varlistentry> + <term><errorcode>ENOMEM</errorcode></term> + <listitem> + <para>No memory to allocate buffers for <link linkend="mmap">memory +mapped</link> I/O.</para> + </listitem> + </varlistentry> + <varlistentry> + <term><errorcode>EINVAL</errorcode></term> + <listitem> + <para>The buffer type (<structfield>type</structfield> field) or the +requested I/O method (<structfield>memory</structfield>) is not +supported.</para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> +</refentry> diff --git a/Documentation/DocBook/media/v4l/vidioc-dqevent.xml b/Documentation/DocBook/media/v4l/vidioc-dqevent.xml index 7769642ee431..e8714aa16433 100644 --- a/Documentation/DocBook/media/v4l/vidioc-dqevent.xml +++ b/Documentation/DocBook/media/v4l/vidioc-dqevent.xml @@ -88,6 +88,12 @@ </row> <row> <entry></entry> + <entry>&v4l2-event-frame-sync;</entry> + <entry><structfield>frame</structfield></entry> + <entry>Event data for event V4L2_EVENT_FRAME_SYNC.</entry> + </row> + <row> + <entry></entry> <entry>__u8</entry> <entry><structfield>data</structfield>[64]</entry> <entry>Event data. Defined by the event type. The union @@ -135,6 +141,129 @@ </tgroup> </table> + <table frame="none" pgwide="1" id="v4l2-event-vsync"> + <title>struct <structname>v4l2_event_vsync</structname></title> + <tgroup cols="3"> + &cs-str; + <tbody valign="top"> + <row> + <entry>__u8</entry> + <entry><structfield>field</structfield></entry> + <entry>The upcoming field. See &v4l2-field;.</entry> + </row> + </tbody> + </tgroup> + </table> + + <table frame="none" pgwide="1" id="v4l2-event-ctrl"> + <title>struct <structname>v4l2_event_ctrl</structname></title> + <tgroup cols="4"> + &cs-str; + <tbody valign="top"> + <row> + <entry>__u32</entry> + <entry><structfield>changes</structfield></entry> + <entry></entry> + <entry>A bitmask that tells what has changed. See <xref linkend="changes-flags" />.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>type</structfield></entry> + <entry></entry> + <entry>The type of the control. See &v4l2-ctrl-type;.</entry> + </row> + <row> + <entry>union (anonymous)</entry> + <entry></entry> + <entry></entry> + <entry></entry> + </row> + <row> + <entry></entry> + <entry>__s32</entry> + <entry><structfield>value</structfield></entry> + <entry>The 32-bit value of the control for 32-bit control types. + This is 0 for string controls since the value of a string + cannot be passed using &VIDIOC-DQEVENT;.</entry> + </row> + <row> + <entry></entry> + <entry>__s64</entry> + <entry><structfield>value64</structfield></entry> + <entry>The 64-bit value of the control for 64-bit control types.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>flags</structfield></entry> + <entry></entry> + <entry>The control flags. See <xref linkend="control-flags" />.</entry> + </row> + <row> + <entry>__s32</entry> + <entry><structfield>minimum</structfield></entry> + <entry></entry> + <entry>The minimum value of the control. See &v4l2-queryctrl;.</entry> + </row> + <row> + <entry>__s32</entry> + <entry><structfield>maximum</structfield></entry> + <entry></entry> + <entry>The maximum value of the control. See &v4l2-queryctrl;.</entry> + </row> + <row> + <entry>__s32</entry> + <entry><structfield>step</structfield></entry> + <entry></entry> + <entry>The step value of the control. See &v4l2-queryctrl;.</entry> + </row> + <row> + <entry>__s32</entry> + <entry><structfield>default_value</structfield></entry> + <entry></entry> + <entry>The default value value of the control. See &v4l2-queryctrl;.</entry> + </row> + </tbody> + </tgroup> + </table> + + <table frame="none" pgwide="1" id="v4l2-event-frame-sync"> + <title>struct <structname>v4l2_event_frame_sync</structname></title> + <tgroup cols="3"> + &cs-str; + <tbody valign="top"> + <row> + <entry>__u32</entry> + <entry><structfield>frame_sequence</structfield></entry> + <entry> + The sequence number of the frame being received. + </entry> + </row> + </tbody> + </tgroup> + </table> + + <table pgwide="1" frame="none" id="changes-flags"> + <title>Changes</title> + <tgroup cols="3"> + &cs-def; + <tbody valign="top"> + <row> + <entry><constant>V4L2_EVENT_CTRL_CH_VALUE</constant></entry> + <entry>0x0001</entry> + <entry>This control event was triggered because the value of the control + changed. Special case: if a button control is pressed, then this + event is sent as well, even though there is not explicit value + associated with a button control.</entry> + </row> + <row> + <entry><constant>V4L2_EVENT_CTRL_CH_FLAGS</constant></entry> + <entry>0x0002</entry> + <entry>This control event was triggered because the control flags + changed.</entry> + </row> + </tbody> + </tgroup> + </table> </refsect1> <refsect1> &return-value; diff --git a/Documentation/DocBook/media/v4l/vidioc-enum-dv-presets.xml b/Documentation/DocBook/media/v4l/vidioc-enum-dv-presets.xml index 1d31427edd1b..0be17c232d3a 100644 --- a/Documentation/DocBook/media/v4l/vidioc-enum-dv-presets.xml +++ b/Documentation/DocBook/media/v4l/vidioc-enum-dv-presets.xml @@ -228,11 +228,3 @@ is out of bounds.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/vidioc-enum-fmt.xml b/Documentation/DocBook/media/v4l/vidioc-enum-fmt.xml index 71d373b6d36a..347d142e7431 100644 --- a/Documentation/DocBook/media/v4l/vidioc-enum-fmt.xml +++ b/Documentation/DocBook/media/v4l/vidioc-enum-fmt.xml @@ -156,11 +156,3 @@ bounds.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/vidioc-enuminput.xml b/Documentation/DocBook/media/v4l/vidioc-enuminput.xml index 476fe1d2bba0..9b8efcd6e947 100644 --- a/Documentation/DocBook/media/v4l/vidioc-enuminput.xml +++ b/Documentation/DocBook/media/v4l/vidioc-enuminput.xml @@ -311,11 +311,3 @@ out of bounds.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/vidioc-enumoutput.xml b/Documentation/DocBook/media/v4l/vidioc-enumoutput.xml index a281d26a195f..a64d5ef103fa 100644 --- a/Documentation/DocBook/media/v4l/vidioc-enumoutput.xml +++ b/Documentation/DocBook/media/v4l/vidioc-enumoutput.xml @@ -196,11 +196,3 @@ is out of bounds.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/vidioc-enumstd.xml b/Documentation/DocBook/media/v4l/vidioc-enumstd.xml index 95803fe2c8e4..3a5fc5405f96 100644 --- a/Documentation/DocBook/media/v4l/vidioc-enumstd.xml +++ b/Documentation/DocBook/media/v4l/vidioc-enumstd.xml @@ -381,11 +381,3 @@ is out of bounds.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-ctrl.xml b/Documentation/DocBook/media/v4l/vidioc-g-ctrl.xml index 5146d00782e3..12b1d0503e26 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-ctrl.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-ctrl.xml @@ -127,11 +127,3 @@ this control belongs to.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml b/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml index 5122ce87e0b8..6f1f9a629dc3 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml @@ -312,10 +312,3 @@ to store the payload and this error code is returned.</para> </refsect1> </refentry> -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-fbuf.xml b/Documentation/DocBook/media/v4l/vidioc-g-fbuf.xml index 055718231bc1..93817f337033 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-fbuf.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-fbuf.xml @@ -295,7 +295,8 @@ set this field to zero.</entry> <entry>The device is capable of non-destructive overlays. When the driver clears this flag, only destructive overlays are supported. There are no drivers yet which support both destructive and -non-destructive overlays.</entry> +non-destructive overlays. Video Output Overlays are in practice always +non-destructive.</entry> </row> <row> <entry><constant>V4L2_FBUF_CAP_CHROMAKEY</constant></entry> @@ -339,8 +340,8 @@ blending makes no sense for destructive overlays.</entry> <row> <entry><constant>V4L2_FBUF_CAP_SRC_CHROMAKEY</constant></entry> <entry>0x0080</entry> - <entry>The device supports Source Chroma-keying. Framebuffer pixels -with the chroma-key colors are replaced by video pixels, which is exactly opposite of + <entry>The device supports Source Chroma-keying. Video pixels +with the chroma-key colors are replaced by framebuffer pixels, which is exactly opposite of <constant>V4L2_FBUF_CAP_CHROMAKEY</constant></entry> </row> </tbody> @@ -356,7 +357,9 @@ with the chroma-key colors are replaced by video pixels, which is exactly opposi <entry><constant>V4L2_FBUF_FLAG_PRIMARY</constant></entry> <entry>0x0001</entry> <entry>The framebuffer is the primary graphics surface. -In other words, the overlay is destructive. [?]</entry> +In other words, the overlay is destructive. This flag is typically set by any +driver that doesn't have the <constant>V4L2_FBUF_CAP_EXTERNOVERLAY</constant> +capability and it is cleared otherwise.</entry> </row> <row> <entry><constant>V4L2_FBUF_FLAG_OVERLAY</constant></entry> @@ -366,9 +369,8 @@ size as the capture. [?]</entry> </row> <row> <entry spanname="hspan">The purpose of -<constant>V4L2_FBUF_FLAG_PRIMARY</constant> and <constant>V4L2_FBUF_FLAG_OVERLAY</constant> was never quite clear. -Most drivers seem to ignore these flags. For compatibility with the +Most drivers seem to ignore this flag. For compatibility with the <wordasword>bttv</wordasword> driver applications should set the <constant>V4L2_FBUF_FLAG_OVERLAY</constant> flag.</entry> </row> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-frequency.xml b/Documentation/DocBook/media/v4l/vidioc-g-frequency.xml index 062d72069090..16431813bebd 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-frequency.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-frequency.xml @@ -135,11 +135,3 @@ wrong.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-modulator.xml b/Documentation/DocBook/media/v4l/vidioc-g-modulator.xml index 15ce660f0f5a..7f4ac7e41fa8 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-modulator.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-modulator.xml @@ -236,11 +236,3 @@ mode.</entry> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-priority.xml b/Documentation/DocBook/media/v4l/vidioc-g-priority.xml index 8f5e3da7002f..6a81b4fe9538 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-priority.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-priority.xml @@ -133,11 +133,3 @@ priority.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-selection.xml b/Documentation/DocBook/media/v4l/vidioc-g-selection.xml new file mode 100644 index 000000000000..a9d36e0c090e --- /dev/null +++ b/Documentation/DocBook/media/v4l/vidioc-g-selection.xml @@ -0,0 +1,304 @@ +<refentry id="vidioc-g-selection"> + + <refmeta> + <refentrytitle>ioctl VIDIOC_G_SELECTION, VIDIOC_S_SELECTION</refentrytitle> + &manvol; + </refmeta> + + <refnamediv> + <refname>VIDIOC_G_SELECTION</refname> + <refname>VIDIOC_S_SELECTION</refname> + <refpurpose>Get or set one of the selection rectangles</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_selection *<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_SELECTION, VIDIOC_S_SELECTION</para> + </listitem> + </varlistentry> + <varlistentry> + <term><parameter>argp</parameter></term> + <listitem> + <para></para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>Description</title> + + <note> + <title>Experimental</title> + <para>This is an <link linkend="experimental"> experimental </link> + interface and may change in the future.</para> + </note> + + <para>The ioctls are used to query and configure selection rectangles.</para> + +<para> To query the cropping (composing) rectangle set <structfield> +&v4l2-selection;::type </structfield> to the respective buffer type. Do not +use multiplanar buffers. Use <constant> V4L2_BUF_TYPE_VIDEO_CAPTURE +</constant> instead of <constant> V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE +</constant>. Use <constant> V4L2_BUF_TYPE_VIDEO_OUTPUT </constant> instead of +<constant> V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE </constant>. The next step is +setting <structfield> &v4l2-selection;::target </structfield> to value +<constant> V4L2_SEL_TGT_CROP_ACTIVE </constant> (<constant> +V4L2_SEL_TGT_COMPOSE_ACTIVE </constant>). Please refer to table <xref +linkend="v4l2-sel-target" /> or <xref linkend="selection-api" /> for additional +targets. Fields <structfield> &v4l2-selection;::flags </structfield> and +<structfield> &v4l2-selection;::reserved </structfield> are ignored and they +must be filled with zeros. The driver fills the rest of the structure or +returns &EINVAL; if incorrect buffer type or target was used. If cropping +(composing) is not supported then the active rectangle is not mutable and it is +always equal to the bounds rectangle. Finally, structure <structfield> +&v4l2-selection;::r </structfield> is filled with the current cropping +(composing) coordinates. The coordinates are expressed in driver-dependent +units. The only exception are rectangles for images in raw formats, whose +coordinates are always expressed in pixels. </para> + +<para> To change the cropping (composing) rectangle set <structfield> +&v4l2-selection;::type </structfield> to the respective buffer type. Do not +use multiplanar buffers. Use <constant> V4L2_BUF_TYPE_VIDEO_CAPTURE +</constant> instead of <constant> V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE +</constant>. Use <constant> V4L2_BUF_TYPE_VIDEO_OUTPUT </constant> instead of +<constant> V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE </constant>. The next step is +setting <structfield> &v4l2-selection;::target </structfield> to value +<constant> V4L2_SEL_TGT_CROP_ACTIVE </constant> (<constant> +V4L2_SEL_TGT_COMPOSE_ACTIVE </constant>). Please refer to table <xref +linkend="v4l2-sel-target" /> or <xref linkend="selection-api" /> for additional +targets. Set desired active area into the field <structfield> +&v4l2-selection;::r </structfield>. Field <structfield> +&v4l2-selection;::reserved </structfield> is ignored and must be filled with +zeros. The driver may adjust the rectangle coordinates. An application may +introduce constraints to control rounding behaviour. Set the field +<structfield> &v4l2-selection;::flags </structfield> to one of values: + +<itemizedlist> + <listitem> +<para><constant>0</constant> - The driver can adjust the rectangle size freely +and shall choose a crop/compose rectangle as close as possible to the requested +one.</para> + </listitem> + <listitem> +<para><constant>V4L2_SEL_FLAG_GE</constant> - The driver is not allowed to +shrink the rectangle. The original rectangle must lay inside the adjusted +one.</para> + </listitem> + <listitem> +<para><constant>V4L2_SEL_FLAG_LE</constant> - The driver is not allowed to +enlarge the rectangle. The adjusted rectangle must lay inside the original +one.</para> + </listitem> + <listitem> +<para><constant>V4L2_SEL_FLAG_GE | V4L2_SEL_FLAG_LE</constant> - The driver +must choose the size exactly the same as in the requested rectangle.</para> + </listitem> +</itemizedlist> + +Please refer to <xref linkend="sel-const-adjust" />. + +</para> + +<para> The driver may have to adjusts the requested dimensions against hardware +limits and other parts as the pipeline, i.e. the bounds given by the +capture/output window or TV display. The closest possible values of horizontal +and vertical offset and sizes are chosen according to following priority: + +<orderedlist> + <listitem> + <para>Satisfy constraints from <structfield>&v4l2-selection;::flags</structfield>.</para> + </listitem> + <listitem> + <para>Adjust width, height, left, and top to hardware limits and alignments.</para> + </listitem> + <listitem> + <para>Keep center of adjusted rectangle as close as possible to the original one.</para> + </listitem> + <listitem> + <para>Keep width and height as close as possible to original ones.</para> + </listitem> + <listitem> + <para>Keep horizontal and vertical offset as close as possible to original ones.</para> + </listitem> +</orderedlist> + +On success the field <structfield> &v4l2-selection;::r </structfield> contains +the adjusted rectangle. When the parameters are unsuitable the application may +modify the cropping (composing) or image parameters and repeat the cycle until +satisfactory parameters have been negotiated. If constraints flags have to be +violated at then ERANGE is returned. The error indicates that <emphasis> there +exist no rectangle </emphasis> that satisfies the constraints.</para> + + </refsect1> + + <refsect1> + <table frame="none" pgwide="1" id="v4l2-sel-target"> + <title>Selection targets.</title> + <tgroup cols="3"> + &cs-def; + <tbody valign="top"> + <row> + <entry><constant>V4L2_SEL_TGT_CROP_ACTIVE</constant></entry> + <entry>0</entry> + <entry>area that is currently cropped by hardware</entry> + </row> + <row> + <entry><constant>V4L2_SEL_TGT_CROP_DEFAULT</constant></entry> + <entry>1</entry> + <entry>suggested cropping rectangle that covers the "whole picture"</entry> + </row> + <row> + <entry><constant>V4L2_SEL_TGT_CROP_BOUNDS</constant></entry> + <entry>2</entry> + <entry>limits for the cropping rectangle</entry> + </row> + <row> + <entry><constant>V4L2_SEL_TGT_COMPOSE_ACTIVE</constant></entry> + <entry>256</entry> + <entry>area to which data are composed by hardware</entry> + </row> + <row> + <entry><constant>V4L2_SEL_TGT_COMPOSE_DEFAULT</constant></entry> + <entry>257</entry> + <entry>suggested composing rectangle that covers the "whole picture"</entry> + </row> + <row> + <entry><constant>V4L2_SEL_TGT_COMPOSE_BOUNDS</constant></entry> + <entry>258</entry> + <entry>limits for the composing rectangle</entry> + </row> + <row> + <entry><constant>V4L2_SEL_TGT_COMPOSE_PADDED</constant></entry> + <entry>259</entry> + <entry>the active area and all padding pixels that are inserted or modified by the hardware</entry> + </row> + </tbody> + </tgroup> + </table> + </refsect1> + + <refsect1> + <table frame="none" pgwide="1" id="v4l2-sel-flags"> + <title>Selection constraint flags</title> + <tgroup cols="3"> + &cs-def; + <tbody valign="top"> + <row> + <entry><constant>V4L2_SEL_FLAG_GE</constant></entry> + <entry>0x00000001</entry> + <entry>indicate that adjusted rectangle must contain a rectangle from <structfield>&v4l2-selection;::r</structfield></entry> + </row> + <row> + <entry><constant>V4L2_SEL_FLAG_LE</constant></entry> + <entry>0x00000002</entry> + <entry>indicate that adjusted rectangle must be inside a rectangle from <structfield>&v4l2-selection;::r</structfield></entry> + </row> + </tbody> + </tgroup> + </table> + </refsect1> + + <section> + <figure id="sel-const-adjust"> + <title>Size adjustments with constraint flags.</title> + <mediaobject> + <imageobject> + <imagedata fileref="constraints.png" format="PNG" /> + </imageobject> + <textobject> + <phrase>Behaviour of rectangle adjustment for different constraint + flags.</phrase> + </textobject> + </mediaobject> + </figure> + </section> + + <refsect1> + <table pgwide="1" frame="none" id="v4l2-selection"> + <title>struct <structname>v4l2_selection</structname></title> + <tgroup cols="3"> + &cs-str; + <tbody valign="top"> + <row> + <entry>__u32</entry> + <entry><structfield>type</structfield></entry> + <entry>Type of the buffer (from &v4l2-buf-type;)</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>target</structfield></entry> + <entry>used to select between <link linkend="v4l2-sel-target"> cropping and composing rectangles </link></entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>flags</structfield></entry> + <entry>control over coordinates adjustments, refer to <link linkend="v4l2-sel-flags">selection flags</link></entry> + </row> + <row> + <entry>&v4l2-rect;</entry> + <entry><structfield>r</structfield></entry> + <entry>selection rectangle</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>reserved[9]</structfield></entry> + <entry>Reserved fields for future use</entry> + </row> + </tbody> + </tgroup> + </table> + </refsect1> + + <refsect1> + &return-value; + <variablelist> + <varlistentry> + <term><errorcode>EINVAL</errorcode></term> + <listitem> + <para>The buffer <structfield> &v4l2-selection;::type </structfield> +or <structfield> &v4l2-selection;::target </structfield> is not supported, or +the <structfield> &v4l2-selection;::flags </structfield> are invalid.</para> + </listitem> + </varlistentry> + <varlistentry> + <term><errorcode>ERANGE</errorcode></term> + <listitem> + <para>it is not possible to adjust a rectangle <structfield> +&v4l2-selection;::r </structfield> that satisfies all contraints from +<structfield> &v4l2-selection;::flags </structfield>.</para> + </listitem> + </varlistentry> + <varlistentry> + <term><errorcode>EBUSY</errorcode></term> + <listitem> + <para>it is not possible to apply change of selection rectangle at the moment. +Usually because streaming is in progress.</para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + +</refentry> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-std.xml b/Documentation/DocBook/media/v4l/vidioc-g-std.xml index 37996f25b5d4..99ff1a016220 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-std.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-std.xml @@ -88,11 +88,3 @@ standards.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml b/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml index bd98c734c06b..91ec2fb658f8 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml @@ -318,6 +318,16 @@ standard.</para><!-- FIXME what if PAL+NTSC and Bi but not SAP? --></entry> <entry>RDS capture is supported. This capability is only valid for radio tuners.</entry> </row> + <row> + <entry><constant>V4L2_TUNER_CAP_RDS_BLOCK_IO</constant></entry> + <entry>0x0100</entry> + <entry>The RDS data is passed as unparsed RDS blocks.</entry> + </row> + <row> + <entry><constant>V4L2_TUNER_CAP_RDS_CONTROLS</constant></entry> + <entry>0x0200</entry> + <entry>The RDS data is parsed by the hardware and set via controls.</entry> + </row> </tbody> </tgroup> </table> @@ -525,11 +535,3 @@ out of bounds.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/vidioc-prepare-buf.xml b/Documentation/DocBook/media/v4l/vidioc-prepare-buf.xml new file mode 100644 index 000000000000..7bde698760e4 --- /dev/null +++ b/Documentation/DocBook/media/v4l/vidioc-prepare-buf.xml @@ -0,0 +1,88 @@ +<refentry id="vidioc-prepare-buf"> + <refmeta> + <refentrytitle>ioctl VIDIOC_PREPARE_BUF</refentrytitle> + &manvol; + </refmeta> + + <refnamediv> + <refname>VIDIOC_PREPARE_BUF</refname> + <refpurpose>Prepare a buffer for I/O</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_buffer *<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_PREPARE_BUF</para> + </listitem> + </varlistentry> + <varlistentry> + <term><parameter>argp</parameter></term> + <listitem> + <para></para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>Description</title> + + <para>Applications can optionally call the +<constant>VIDIOC_PREPARE_BUF</constant> ioctl to pass ownership of the buffer +to the driver before actually enqueuing it, using the +<constant>VIDIOC_QBUF</constant> ioctl, and to prepare it for future I/O. +Such preparations may include cache invalidation or cleaning. Performing them +in advance saves time during the actual I/O. In case such cache operations are +not required, the application can use one of +<constant>V4L2_BUF_FLAG_NO_CACHE_INVALIDATE</constant> and +<constant>V4L2_BUF_FLAG_NO_CACHE_CLEAN</constant> flags to skip the respective +step.</para> + + <para>The <structname>v4l2_buffer</structname> structure is +specified in <xref linkend="buffer" />.</para> + </refsect1> + + <refsect1> + &return-value; + + <variablelist> + <varlistentry> + <term><errorcode>EBUSY</errorcode></term> + <listitem> + <para>File I/O is in progress.</para> + </listitem> + </varlistentry> + <varlistentry> + <term><errorcode>EINVAL</errorcode></term> + <listitem> + <para>The buffer <structfield>type</structfield> is not +supported, or the <structfield>index</structfield> is out of bounds, +or no buffers have been allocated yet, or the +<structfield>userptr</structfield> or +<structfield>length</structfield> are invalid.</para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> +</refentry> diff --git a/Documentation/DocBook/media/v4l/vidioc-querybuf.xml b/Documentation/DocBook/media/v4l/vidioc-querybuf.xml index 5c104d42d31c..6e414d7b6df7 100644 --- a/Documentation/DocBook/media/v4l/vidioc-querybuf.xml +++ b/Documentation/DocBook/media/v4l/vidioc-querybuf.xml @@ -100,11 +100,3 @@ supported, or the <structfield>index</structfield> is out of bounds.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/vidioc-queryctrl.xml b/Documentation/DocBook/media/v4l/vidioc-queryctrl.xml index 677ea646c29f..36660d311b51 100644 --- a/Documentation/DocBook/media/v4l/vidioc-queryctrl.xml +++ b/Documentation/DocBook/media/v4l/vidioc-queryctrl.xml @@ -406,6 +406,15 @@ flag is typically present for relative controls or action controls where writing a value will cause the device to carry out a given action (⪚ motor control) but no meaningful value can be returned.</entry> </row> + <row> + <entry><constant>V4L2_CTRL_FLAG_VOLATILE</constant></entry> + <entry>0x0080</entry> + <entry>This control is volatile, which means that the value of the control +changes continuously. A typical example would be the current gain value if the device +is in auto-gain mode. In such a case the hardware calculates the gain value based on +the lighting conditions which can change over time. Note that setting a new value for +a volatile control will have no effect. The new value will just be ignored.</entry> + </row> </tbody> </tgroup> </table> @@ -434,11 +443,3 @@ or this particular menu item is not supported by the driver.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml b/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml index c30dcc4232c0..e013da845b11 100644 --- a/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml +++ b/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml @@ -125,11 +125,3 @@ wrong.</para> </variablelist> </refsect1> </refentry> - -<!-- -Local Variables: -mode: sgml -sgml-parent-document: "v4l2.sgml" -indent-tabs-mode: nil -End: ---> diff --git a/Documentation/DocBook/media/v4l/vidioc-subscribe-event.xml b/Documentation/DocBook/media/v4l/vidioc-subscribe-event.xml index 69c0d8a2a3d2..5c70b616d818 100644 --- a/Documentation/DocBook/media/v4l/vidioc-subscribe-event.xml +++ b/Documentation/DocBook/media/v4l/vidioc-subscribe-event.xml @@ -139,6 +139,22 @@ </entry> </row> <row> + <entry><constant>V4L2_EVENT_FRAME_SYNC</constant></entry> + <entry>4</entry> + <entry> + <para>Triggered immediately when the reception of a + frame has begun. This event has a + &v4l2-event-frame-sync; associated with it.</para> + + <para>If the hardware needs to be stopped in the case of a + buffer underrun it might not be able to generate this event. + In such cases the <structfield>frame_sequence</structfield> + field in &v4l2-event-frame-sync; will not be incremented. This + causes two consecutive frame sequence numbers to have n times + frame interval in between them.</para> + </entry> + </row> + <row> <entry><constant>V4L2_EVENT_PRIVATE_START</constant></entry> <entry>0x08000000</entry> <entry>Base event number for driver-private events.</entry> @@ -183,113 +199,6 @@ </tgroup> </table> - <table frame="none" pgwide="1" id="v4l2-event-vsync"> - <title>struct <structname>v4l2_event_vsync</structname></title> - <tgroup cols="3"> - &cs-str; - <tbody valign="top"> - <row> - <entry>__u8</entry> - <entry><structfield>field</structfield></entry> - <entry>The upcoming field. See &v4l2-field;.</entry> - </row> - </tbody> - </tgroup> - </table> - - <table frame="none" pgwide="1" id="v4l2-event-ctrl"> - <title>struct <structname>v4l2_event_ctrl</structname></title> - <tgroup cols="4"> - &cs-str; - <tbody valign="top"> - <row> - <entry>__u32</entry> - <entry><structfield>changes</structfield></entry> - <entry></entry> - <entry>A bitmask that tells what has changed. See <xref linkend="changes-flags" />.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>type</structfield></entry> - <entry></entry> - <entry>The type of the control. See &v4l2-ctrl-type;.</entry> - </row> - <row> - <entry>union (anonymous)</entry> - <entry></entry> - <entry></entry> - <entry></entry> - </row> - <row> - <entry></entry> - <entry>__s32</entry> - <entry><structfield>value</structfield></entry> - <entry>The 32-bit value of the control for 32-bit control types. - This is 0 for string controls since the value of a string - cannot be passed using &VIDIOC-DQEVENT;.</entry> - </row> - <row> - <entry></entry> - <entry>__s64</entry> - <entry><structfield>value64</structfield></entry> - <entry>The 64-bit value of the control for 64-bit control types.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>flags</structfield></entry> - <entry></entry> - <entry>The control flags. See <xref linkend="control-flags" />.</entry> - </row> - <row> - <entry>__s32</entry> - <entry><structfield>minimum</structfield></entry> - <entry></entry> - <entry>The minimum value of the control. See &v4l2-queryctrl;.</entry> - </row> - <row> - <entry>__s32</entry> - <entry><structfield>maximum</structfield></entry> - <entry></entry> - <entry>The maximum value of the control. See &v4l2-queryctrl;.</entry> - </row> - <row> - <entry>__s32</entry> - <entry><structfield>step</structfield></entry> - <entry></entry> - <entry>The step value of the control. See &v4l2-queryctrl;.</entry> - </row> - <row> - <entry>__s32</entry> - <entry><structfield>default_value</structfield></entry> - <entry></entry> - <entry>The default value value of the control. See &v4l2-queryctrl;.</entry> - </row> - </tbody> - </tgroup> - </table> - - <table pgwide="1" frame="none" id="changes-flags"> - <title>Changes</title> - <tgroup cols="3"> - &cs-def; - <tbody valign="top"> - <row> - <entry><constant>V4L2_EVENT_CTRL_CH_VALUE</constant></entry> - <entry>0x0001</entry> - <entry>This control event was triggered because the value of the control - changed. Special case: if a button control is pressed, then this - event is sent as well, even though there is not explicit value - associated with a button control.</entry> - </row> - <row> - <entry><constant>V4L2_EVENT_CTRL_CH_FLAGS</constant></entry> - <entry>0x0002</entry> - <entry>This control event was triggered because the control flags - changed.</entry> - </row> - </tbody> - </tgroup> - </table> </refsect1> <refsect1> &return-value; |
