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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-24 21:21:51 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-24 21:21:51 +0400 |
| commit | ab11ca34eea8fda7a1a9302d86f6ef6108ffd68f (patch) | |
| tree | 987ec6c263f3dfa4a7a6f9ce4d5ece47cbc12e29 /Documentation/DocBook/media | |
| parent | f9369910a6225b8d4892c3f20ae740a711cd5ace (diff) | |
| parent | 71006fb22b0f5a2045605b3887ee99a0e9adafe4 (diff) | |
| download | linux-ab11ca34eea8fda7a1a9302d86f6ef6108ffd68f.tar.xz | |
Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media updates from Mauro Carvalho Chehab:
- some V4L2 API updates needed by embedded devices
- DVB API extensions for ATSC-MH delivery system, used in US for mobile
TV
- new tuners for fc0011/0012/0013 and tua9001
- a new dvb driver for af9033/9035
- a new ATSC-MH frontend (lg2160)
- new remote controller keymaps
- Removal of a few legacy webcam driver that got replaced by gspca on
several kernel versions ago
- a new driver for Exynos 4/5 webcams(s5pp fimc-lite)
- a new webcam sensor driver (smiapp)
- a new video input driver for embedded (sta2x1xx)
- several improvements, fixes, cleanups, etc inside the drivers.
Manually fix up conflicts due to err() -> dev_err() conversion in
drivers/staging/media/easycap/easycap_main.c
* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (484 commits)
[media] saa7134-cards: Remove a PCI entry added by mistake
[media] radio-sf16fmi: add support for SF16-FMD
[media] rc-loopback: remove duplicate line
[media] patch for Asus My Cinema PS3-100 (1043:48cd)
[media] au0828: Move the Kconfig knob under V4L_USB_DRIVERS
[media] em28xx: simple comment fix
[media] [resend] radio-sf16fmr2: add PnP support for SF16-FMD2
[media] smiapp: Use v4l2_ctrl_new_int_menu() instead of v4l2_ctrl_new_custom()
[media] smiapp: Add support for 8-bit uncompressed formats
[media] smiapp: Allow generic quirk registers
[media] smiapp: Use non-binning limits if the binning limit is zero
[media] smiapp: Initialise rval in smiapp_read_nvm()
[media] smiapp: Round minimum pre_pll up rather than down in ip_clk_freq check
[media] smiapp: Use 8-bit reads only before identifying the sensor
[media] smiapp: Quirk for sensors that only do 8-bit reads
[media] smiapp: Pass struct sensor to register writing commands instead of i2c_client
[media] smiapp: Allow using external clock from the clock framework
[media] zl10353: change .read_snr() to report SNR as a 0.1 dB
[media] media: add support to gspca/pac7302.c for 093a:2627 (Genius FaceCam 300)
[media] m88rs2000 - only flip bit 2 on reg 0x70 on 16th try
...
Diffstat (limited to 'Documentation/DocBook/media')
43 files changed, 5839 insertions, 115 deletions
diff --git a/Documentation/DocBook/media/Makefile b/Documentation/DocBook/media/Makefile index 6628b4b9cac4..362520992ced 100644 --- a/Documentation/DocBook/media/Makefile +++ b/Documentation/DocBook/media/Makefile @@ -70,6 +70,8 @@ IOCTLS = \ VIDIOC_SUBDEV_ENUM_MBUS_CODE \ VIDIOC_SUBDEV_ENUM_FRAME_SIZE \ VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL \ + VIDIOC_SUBDEV_G_SELECTION \ + VIDIOC_SUBDEV_S_SELECTION \ TYPES = \ $(shell perl -ne 'print "$$1 " if /^typedef\s+[^\s]+\s+([^\s]+)\;/' $(srctree)/include/linux/videodev2.h) \ @@ -193,7 +195,7 @@ DVB_DOCUMENTED = \ # install_media_images = \ - $(Q)cp $(OBJIMGFILES) $(MEDIA_OBJ_DIR)/media_api + $(Q)cp $(OBJIMGFILES) $(MEDIA_SRC_DIR)/v4l/*.svg $(MEDIA_OBJ_DIR)/media_api $(MEDIA_OBJ_DIR)/%: $(MEDIA_SRC_DIR)/%.b64 $(Q)base64 -d $< >$@ diff --git a/Documentation/DocBook/media/dvb/dvbproperty.xml b/Documentation/DocBook/media/dvb/dvbproperty.xml index c7a4ca517859..e633c097a8d1 100644 --- a/Documentation/DocBook/media/dvb/dvbproperty.xml +++ b/Documentation/DocBook/media/dvb/dvbproperty.xml @@ -531,6 +531,139 @@ typedef enum fe_delivery_system { here are referring to what can be found in the TMCC-structure - independent of the mode.</para> </section> + <section id="DTV-ATSCMH-FIC-VER"> + <title><constant>DTV_ATSCMH_FIC_VER</constant></title> + <para>Version number of the FIC (Fast Information Channel) signaling data.</para> + <para>FIC is used for relaying information to allow rapid service acquisition by the receiver.</para> + <para>Possible values: 0, 1, 2, 3, ..., 30, 31</para> + </section> + <section id="DTV-ATSCMH-PARADE-ID"> + <title><constant>DTV_ATSCMH_PARADE_ID</constant></title> + <para>Parade identification number</para> + <para>A parade is a collection of up to eight MH groups, conveying one or two ensembles.</para> + <para>Possible values: 0, 1, 2, 3, ..., 126, 127</para> + </section> + <section id="DTV-ATSCMH-NOG"> + <title><constant>DTV_ATSCMH_NOG</constant></title> + <para>Number of MH groups per MH subframe for a designated parade.</para> + <para>Possible values: 1, 2, 3, 4, 5, 6, 7, 8</para> + </section> + <section id="DTV-ATSCMH-TNOG"> + <title><constant>DTV_ATSCMH_TNOG</constant></title> + <para>Total number of MH groups including all MH groups belonging to all MH parades in one MH subframe.</para> + <para>Possible values: 0, 1, 2, 3, ..., 30, 31</para> + </section> + <section id="DTV-ATSCMH-SGN"> + <title><constant>DTV_ATSCMH_SGN</constant></title> + <para>Start group number.</para> + <para>Possible values: 0, 1, 2, 3, ..., 14, 15</para> + </section> + <section id="DTV-ATSCMH-PRC"> + <title><constant>DTV_ATSCMH_PRC</constant></title> + <para>Parade repetition cycle.</para> + <para>Possible values: 1, 2, 3, 4, 5, 6, 7, 8</para> + </section> + <section id="DTV-ATSCMH-RS-FRAME-MODE"> + <title><constant>DTV_ATSCMH_RS_FRAME_MODE</constant></title> + <para>RS frame mode.</para> + <para>Possible values are:</para> +<programlisting> +typedef enum atscmh_rs_frame_mode { + ATSCMH_RSFRAME_PRI_ONLY = 0, + ATSCMH_RSFRAME_PRI_SEC = 1, +} atscmh_rs_frame_mode_t; +</programlisting> + </section> + <section id="DTV-ATSCMH-RS-FRAME-ENSEMBLE"> + <title><constant>DTV_ATSCMH_RS_FRAME_ENSEMBLE</constant></title> + <para>RS frame ensemble.</para> + <para>Possible values are:</para> +<programlisting> +typedef enum atscmh_rs_frame_ensemble { + ATSCMH_RSFRAME_ENS_PRI = 0, + ATSCMH_RSFRAME_ENS_SEC = 1, +} atscmh_rs_frame_ensemble_t; +</programlisting> + </section> + <section id="DTV-ATSCMH-RS-CODE-MODE-PRI"> + <title><constant>DTV_ATSCMH_RS_CODE_MODE_PRI</constant></title> + <para>RS code mode (primary).</para> + <para>Possible values are:</para> +<programlisting> +typedef enum atscmh_rs_code_mode { + ATSCMH_RSCODE_211_187 = 0, + ATSCMH_RSCODE_223_187 = 1, + ATSCMH_RSCODE_235_187 = 2, +} atscmh_rs_code_mode_t; +</programlisting> + </section> + <section id="DTV-ATSCMH-RS-CODE-MODE-SEC"> + <title><constant>DTV_ATSCMH_RS_CODE_MODE_SEC</constant></title> + <para>RS code mode (secondary).</para> + <para>Possible values are:</para> +<programlisting> +typedef enum atscmh_rs_code_mode { + ATSCMH_RSCODE_211_187 = 0, + ATSCMH_RSCODE_223_187 = 1, + ATSCMH_RSCODE_235_187 = 2, +} atscmh_rs_code_mode_t; +</programlisting> + </section> + <section id="DTV-ATSCMH-SCCC-BLOCK-MODE"> + <title><constant>DTV_ATSCMH_SCCC_BLOCK_MODE</constant></title> + <para>Series Concatenated Convolutional Code Block Mode.</para> + <para>Possible values are:</para> +<programlisting> +typedef enum atscmh_sccc_block_mode { + ATSCMH_SCCC_BLK_SEP = 0, + ATSCMH_SCCC_BLK_COMB = 1, +} atscmh_sccc_block_mode_t; +</programlisting> + </section> + <section id="DTV-ATSCMH-SCCC-CODE-MODE-A"> + <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_A</constant></title> + <para>Series Concatenated Convolutional Code Rate.</para> + <para>Possible values are:</para> +<programlisting> +typedef enum atscmh_sccc_code_mode { + ATSCMH_SCCC_CODE_HLF = 0, + ATSCMH_SCCC_CODE_QTR = 1, +} atscmh_sccc_code_mode_t; +</programlisting> + </section> + <section id="DTV-ATSCMH-SCCC-CODE-MODE-B"> + <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_B</constant></title> + <para>Series Concatenated Convolutional Code Rate.</para> + <para>Possible values are:</para> +<programlisting> +typedef enum atscmh_sccc_code_mode { + ATSCMH_SCCC_CODE_HLF = 0, + ATSCMH_SCCC_CODE_QTR = 1, +} atscmh_sccc_code_mode_t; +</programlisting> + </section> + <section id="DTV-ATSCMH-SCCC-CODE-MODE-C"> + <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_C</constant></title> + <para>Series Concatenated Convolutional Code Rate.</para> + <para>Possible values are:</para> +<programlisting> +typedef enum atscmh_sccc_code_mode { + ATSCMH_SCCC_CODE_HLF = 0, + ATSCMH_SCCC_CODE_QTR = 1, +} atscmh_sccc_code_mode_t; +</programlisting> + </section> + <section id="DTV-ATSCMH-SCCC-CODE-MODE-D"> + <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_D</constant></title> + <para>Series Concatenated Convolutional Code Rate.</para> + <para>Possible values are:</para> +<programlisting> +typedef enum atscmh_sccc_code_mode { + ATSCMH_SCCC_CODE_HLF = 0, + ATSCMH_SCCC_CODE_QTR = 1, +} atscmh_sccc_code_mode_t; +</programlisting> + </section> </section> <section id="DTV-API-VERSION"> <title><constant>DTV_API_VERSION</constant></title> @@ -774,6 +907,33 @@ typedef enum fe_hierarchy { <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> </itemizedlist> </section> + <section id="atscmh-params"> + <title>ATSC-MH delivery system</title> + <para>The following parameters are valid for ATSC-MH:</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-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> + <listitem><para><link linkend="DTV-ATSCMH-FIC-VER"><constant>DTV_ATSCMH_FIC_VER</constant></link></para></listitem> + <listitem><para><link linkend="DTV-ATSCMH-PARADE-ID"><constant>DTV_ATSCMH_PARADE_ID</constant></link></para></listitem> + <listitem><para><link linkend="DTV-ATSCMH-NOG"><constant>DTV_ATSCMH_NOG</constant></link></para></listitem> + <listitem><para><link linkend="DTV-ATSCMH-TNOG"><constant>DTV_ATSCMH_TNOG</constant></link></para></listitem> + <listitem><para><link linkend="DTV-ATSCMH-SGN"><constant>DTV_ATSCMH_SGN</constant></link></para></listitem> + <listitem><para><link linkend="DTV-ATSCMH-PRC"><constant>DTV_ATSCMH_PRC</constant></link></para></listitem> + <listitem><para><link linkend="DTV-ATSCMH-RS-FRAME-MODE"><constant>DTV_ATSCMH_RS_FRAME_MODE</constant></link></para></listitem> + <listitem><para><link linkend="DTV-ATSCMH-RS-FRAME-ENSEMBLE"><constant>DTV_ATSCMH_RS_FRAME_ENSEMBLE</constant></link></para></listitem> + <listitem><para><link linkend="DTV-ATSCMH-CODE-MODE-PRI"><constant>DTV_ATSCMH_CODE_MODE_PRI</constant></link></para></listitem> + <listitem><para><link linkend="DTV-ATSCMH-CODE-MODE-SEC"><constant>DTV_ATSCMH_CODE_MODE_SEC</constant></link></para></listitem> + <listitem><para><link linkend="DTV-ATSCMH-SCCC-BLOCK-MODE"><constant>DTV_ATSCMH_SCCC_BLOCK_MODE</constant></link></para></listitem> + <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE_MODE-A"><constant>DTV_ATSCMH_SCCC_CODE_MODE_A</constant></link></para></listitem> + <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE_MODE-B"><constant>DTV_ATSCMH_SCCC_CODE_MODE_B</constant></link></para></listitem> + <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE_MODE-C"><constant>DTV_ATSCMH_SCCC_CODE_MODE_C</constant></link></para></listitem> + <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE_MODE-D"><constant>DTV_ATSCMH_SCCC_CODE_MODE_D</constant></link></para></listitem> + </itemizedlist> + </section> </section> <section id="frontend-property-cable-systems"> <title>Properties used on cable delivery systems</title> diff --git a/Documentation/DocBook/media/v4l/biblio.xml b/Documentation/DocBook/media/v4l/biblio.xml index 7dc65c592a87..7c49facecd25 100644 --- a/Documentation/DocBook/media/v4l/biblio.xml +++ b/Documentation/DocBook/media/v4l/biblio.xml @@ -197,4 +197,33 @@ in the frequency range from 87,5 to 108,0 MHz</title> <title>NTSC-4: United States RBDS Standard</title> </biblioentry> + <biblioentry id="iso12232"> + <abbrev>ISO 12232:2006</abbrev> + <authorgroup> + <corpauthor>International Organization for Standardization +(<ulink url="http://www.iso.org">http://www.iso.org</ulink>)</corpauthor> + </authorgroup> + <title>Photography — Digital still cameras — Determination + of exposure index, ISO speed ratings, standard output sensitivity, and + recommended exposure index</title> + </biblioentry> + + <biblioentry id="cea861"> + <abbrev>CEA-861-E</abbrev> + <authorgroup> + <corpauthor>Consumer Electronics Association +(<ulink url="http://www.ce.org">http://www.ce.org</ulink>)</corpauthor> + </authorgroup> + <title>A DTV Profile for Uncompressed High Speed Digital Interfaces</title> + </biblioentry> + + <biblioentry id="vesadmt"> + <abbrev>VESA DMT</abbrev> + <authorgroup> + <corpauthor>Video Electronics Standards Association +(<ulink url="http://www.vesa.org">http://www.vesa.org</ulink>)</corpauthor> + </authorgroup> + <title>VESA and Industry Standards and Guidelines for Computer Display Monitor Timing (DMT)</title> + </biblioentry> + </bibliography> diff --git a/Documentation/DocBook/media/v4l/common.xml b/Documentation/DocBook/media/v4l/common.xml index c79278acfb0e..4101aeb56540 100644 --- a/Documentation/DocBook/media/v4l/common.xml +++ b/Documentation/DocBook/media/v4l/common.xml @@ -724,41 +724,49 @@ if (-1 == ioctl (fd, &VIDIOC-S-STD;, &std_id)) { } </programlisting> </example> + </section> <section id="dv-timings"> <title>Digital Video (DV) Timings</title> <para> - The video standards discussed so far has been dealing with Analog TV and the + The video standards discussed so far have been dealing with Analog TV and the corresponding video timings. Today there are many more different hardware interfaces such as High Definition TV interfaces (HDMI), VGA, DVI connectors etc., that carry video signals and there is a need to extend the API to select the video timings for these interfaces. Since it is not possible to extend the &v4l2-std-id; due to -the limited bits available, a new set of IOCTLs is added to set/get video timings at +the limited bits available, a new set of IOCTLs was added to set/get video timings at the input and output: </para><itemizedlist> <listitem> - <para>DV Presets: Digital Video (DV) presets. These are IDs representing a + <para>DV Timings: This will allow applications to define detailed +video timings for the interface. This includes parameters such as width, height, +polarities, frontporch, backporch etc. The <filename>linux/v4l2-dv-timings.h</filename> +header can be used to get the timings of the formats in the <xref linkend="cea861" /> and +<xref linkend="vesadmt" /> standards. + </para> + </listitem> + <listitem> + <para>DV Presets: Digital Video (DV) presets (<emphasis role="bold">deprecated</emphasis>). + These are IDs representing a video timing at the input/output. Presets are pre-defined timings implemented by the hardware according to video standards. A __u32 data type is used to represent a preset unlike the bit mask that is used in &v4l2-std-id; allowing future extensions -to support as many different presets as needed.</para> - </listitem> - <listitem> - <para>Custom DV Timings: This will allow applications to define more detailed -custom video timings for the interface. This includes parameters such as width, height, -polarities, frontporch, backporch etc. - </para> +to support as many different presets as needed. This API is deprecated in favor of the DV Timings +API.</para> </listitem> </itemizedlist> + <para>To enumerate and query the attributes of the DV timings supported by a device, + applications use the &VIDIOC-ENUM-DV-TIMINGS; and &VIDIOC-DV-TIMINGS-CAP; ioctls. + To set DV timings for the device, applications use the +&VIDIOC-S-DV-TIMINGS; ioctl and to get current DV timings they use the +&VIDIOC-G-DV-TIMINGS; ioctl. To detect the DV timings as seen by the video receiver applications +use the &VIDIOC-QUERY-DV-TIMINGS; ioctl.</para> <para>To enumerate and query the attributes of DV presets supported by a device, applications use the &VIDIOC-ENUM-DV-PRESETS; ioctl. To get the current DV preset, applications use the &VIDIOC-G-DV-PRESET; ioctl and to set a preset they use the -&VIDIOC-S-DV-PRESET; ioctl.</para> - <para>To set custom DV timings for the device, applications use the -&VIDIOC-S-DV-TIMINGS; ioctl and to get current custom DV timings they use the -&VIDIOC-G-DV-TIMINGS; ioctl.</para> +&VIDIOC-S-DV-PRESET; ioctl. To detect the preset as seen by the video receiver applications +use the &VIDIOC-QUERY-DV-PRESET; ioctl.</para> <para>Applications can make use of the <xref linkend="input-capabilities" /> and <xref linkend="output-capabilities"/> flags to decide what ioctls are available to set the video timings for the device.</para> - </section> </section> &sub-controls; diff --git a/Documentation/DocBook/media/v4l/compat.xml b/Documentation/DocBook/media/v4l/compat.xml index bce97c50391b..ea42ef824948 100644 --- a/Documentation/DocBook/media/v4l/compat.xml +++ b/Documentation/DocBook/media/v4l/compat.xml @@ -2407,6 +2407,54 @@ details.</para> <para>Added <link linkend="jpeg-controls">JPEG compression control class</link>.</para> </listitem> + <listitem> + <para>Extended the DV Timings API: + &VIDIOC-ENUM-DV-TIMINGS;, &VIDIOC-QUERY-DV-TIMINGS; and + &VIDIOC-DV-TIMINGS-CAP;.</para> + </listitem> + </orderedlist> + </section> + + <section> + <title>V4L2 in Linux 3.5</title> + <orderedlist> + <listitem> + <para>Added integer menus, the new type will be + V4L2_CTRL_TYPE_INTEGER_MENU.</para> + </listitem> + <listitem> + <para>Added selection API for V4L2 subdev interface: + &VIDIOC-SUBDEV-G-SELECTION; and + &VIDIOC-SUBDEV-S-SELECTION;.</para> + </listitem> + <listitem> + <para> Added <constant>V4L2_COLORFX_ANTIQUE</constant>, + <constant>V4L2_COLORFX_ART_FREEZE</constant>, + <constant>V4L2_COLORFX_AQUA</constant>, + <constant>V4L2_COLORFX_SILHOUETTE</constant>, + <constant>V4L2_COLORFX_SOLARIZATION</constant>, + <constant>V4L2_COLORFX_VIVID</constant> and + <constant>V4L2_COLORFX_ARBITRARY_CBCR</constant> menu items + to the <constant>V4L2_CID_COLORFX</constant> control.</para> + </listitem> + <listitem> + <para> Added <constant>V4L2_CID_COLORFX_CBCR</constant> control.</para> + </listitem> + <listitem> + <para> Added camera controls <constant>V4L2_CID_AUTO_EXPOSURE_BIAS</constant>, + <constant>V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE</constant>, + <constant>V4L2_CID_IMAGE_STABILIZATION</constant>, + <constant>V4L2_CID_ISO_SENSITIVITY</constant>, + <constant>V4L2_CID_ISO_SENSITIVITY_AUTO</constant>, + <constant>V4L2_CID_EXPOSURE_METERING</constant>, + <constant>V4L2_CID_SCENE_MODE</constant>, + <constant>V4L2_CID_3A_LOCK</constant>, + <constant>V4L2_CID_AUTO_FOCUS_START</constant>, + <constant>V4L2_CID_AUTO_FOCUS_STOP</constant>, + <constant>V4L2_CID_AUTO_FOCUS_STATUS</constant> and + <constant>V4L2_CID_AUTO_FOCUS_RANGE</constant>. + </para> + </listitem> </orderedlist> </section> @@ -2508,6 +2556,10 @@ and may change in the future.</para> ioctls.</para> </listitem> <listitem> + <para>&VIDIOC-DECODER-CMD; and &VIDIOC-TRY-DECODER-CMD; +ioctls.</para> + </listitem> + <listitem> <para>&VIDIOC-DBG-G-REGISTER; and &VIDIOC-DBG-S-REGISTER; ioctls.</para> </listitem> @@ -2515,6 +2567,10 @@ ioctls.</para> <para>&VIDIOC-DBG-G-CHIP-IDENT; ioctl.</para> </listitem> <listitem> + <para>&VIDIOC-ENUM-DV-TIMINGS;, &VIDIOC-QUERY-DV-TIMINGS; and + &VIDIOC-DV-TIMINGS-CAP; ioctls.</para> + </listitem> + <listitem> <para>Flash API. <xref linkend="flash-controls" /></para> </listitem> <listitem> @@ -2523,6 +2579,14 @@ ioctls.</para> <listitem> <para>Selection API. <xref linkend="selection-api" /></para> </listitem> + <listitem> + <para>Sub-device selection API: &VIDIOC-SUBDEV-G-SELECTION; + and &VIDIOC-SUBDEV-S-SELECTION; ioctls.</para> + </listitem> + <listitem> + <para><link linkend="v4l2-auto-focus-area"><constant> + V4L2_CID_AUTO_FOCUS_AREA</constant></link> control.</para> + </listitem> </itemizedlist> </section> @@ -2538,6 +2602,17 @@ interfaces and should not be implemented in new drivers.</para> <constant>VIDIOC_S_MPEGCOMP</constant> ioctls. Use Extended Controls, <xref linkend="extended-controls" />.</para> </listitem> + <listitem> + <para>&VIDIOC-G-DV-PRESET;, &VIDIOC-S-DV-PRESET;, &VIDIOC-ENUM-DV-PRESETS; and + &VIDIOC-QUERY-DV-PRESET; ioctls. Use the DV Timings API (<xref linkend="dv-timings" />).</para> + </listitem> + <listitem> + <para><constant>VIDIOC_SUBDEV_G_CROP</constant> and + <constant>VIDIOC_SUBDEV_S_CROP</constant> ioctls. Use + <constant>VIDIOC_SUBDEV_G_SELECTION</constant> and + <constant>VIDIOC_SUBDEV_S_SELECTION</constant>, <xref + linkend="vidioc-subdev-g-selection" />.</para> + </listitem> </itemizedlist> </section> </section> diff --git a/Documentation/DocBook/media/v4l/controls.xml b/Documentation/DocBook/media/v4l/controls.xml index dd03cf4a6539..676bc46f9c52 100644 --- a/Documentation/DocBook/media/v4l/controls.xml +++ b/Documentation/DocBook/media/v4l/controls.xml @@ -285,18 +285,92 @@ minimum value disables backlight compensation.</entry> <row id="v4l2-colorfx"> <entry><constant>V4L2_CID_COLORFX</constant></entry> <entry>enum</entry> - <entry>Selects a color effect. Possible values for -<constant>enum v4l2_colorfx</constant> are: -<constant>V4L2_COLORFX_NONE</constant> (0), -<constant>V4L2_COLORFX_BW</constant> (1), -<constant>V4L2_COLORFX_SEPIA</constant> (2), -<constant>V4L2_COLORFX_NEGATIVE</constant> (3), -<constant>V4L2_COLORFX_EMBOSS</constant> (4), -<constant>V4L2_COLORFX_SKETCH</constant> (5), -<constant>V4L2_COLORFX_SKY_BLUE</constant> (6), -<constant>V4L2_COLORFX_GRASS_GREEN</constant> (7), -<constant>V4L2_COLORFX_SKIN_WHITEN</constant> (8) and -<constant>V4L2_COLORFX_VIVID</constant> (9).</entry> + <entry>Selects a color effect. The following values are defined: + </entry> + </row><row> + <entry></entry> + <entry></entry> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry><constant>V4L2_COLORFX_NONE</constant> </entry> + <entry>Color effect is disabled.</entry> + </row> + <row> + <entry><constant>V4L2_COLORFX_ANTIQUE</constant> </entry> + <entry>An aging (old photo) effect.</entry> + </row> + <row> + <entry><constant>V4L2_COLORFX_ART_FREEZE</constant> </entry> + <entry>Frost color effect.</entry> + </row> + <row> + <entry><constant>V4L2_COLORFX_AQUA</constant> </entry> + <entry>Water color, cool tone.</entry> + </row> + <row> + <entry><constant>V4L2_COLORFX_BW</constant> </entry> + <entry>Black and white.</entry> + </row> + <row> + <entry><constant>V4L2_COLORFX_EMBOSS</constant> </entry> + <entry>Emboss, the highlights and shadows replace light/dark boundaries + and low contrast areas are set to a gray background.</entry> + </row> + <row> + <entry><constant>V4L2_COLORFX_GRASS_GREEN</constant> </entry> + <entry>Grass green.</entry> + </row> + <row> + <entry><constant>V4L2_COLORFX_NEGATIVE</constant> </entry> + <entry>Negative.</entry> + </row> + <row> + <entry><constant>V4L2_COLORFX_SEPIA</constant> </entry> + <entry>Sepia tone.</entry> + </row> + <row> + <entry><constant>V4L2_COLORFX_SKETCH</constant> </entry> + <entry>Sketch.</entry> + </row> + <row> + <entry><constant>V4L2_COLORFX_SKIN_WHITEN</constant> </entry> + <entry>Skin whiten.</entry> + </row> + <row> + <entry><constant>V4L2_COLORFX_SKY_BLUE</constant> </entry> + <entry>Sky blue.</entry> + </row> + <row> + <entry><constant>V4L2_COLORFX_SOLARIZATION</constant> </entry> + <entry>Solarization, the image is partially reversed in tone, + only color values above or below a certain threshold are inverted. + </entry> + </row> + <row> + <entry><constant>V4L2_COLORFX_SILHOUETTE</constant> </entry> + <entry>Silhouette (outline).</entry> + </row> + <row> + <entry><constant>V4L2_COLORFX_VIVID</constant> </entry> + <entry>Vivid colors.</entry> + </row> + <row> + <entry><constant>V4L2_COLORFX_SET_CBCR</constant> </entry> + <entry>The Cb and Cr chroma components are replaced by fixed + coefficients determined by <constant>V4L2_CID_COLORFX_CBCR</constant> + control.</entry> + </row> + </tbody> + </entrytbl> + </row> + <row> + <entry><constant>V4L2_CID_COLORFX_CBCR</constant></entry> + <entry>integer</entry> + <entry>Determines the Cb and Cr coefficients for <constant>V4L2_COLORFX_SET_CBCR</constant> + color effect. Bits [7:0] of the supplied 32 bit value are interpreted as + Cr component, bits [15:8] as Cb component and bits [31:16] must be zero. + </entry> </row> <row> <entry><constant>V4L2_CID_ROTATE</constant></entry> @@ -2775,6 +2849,51 @@ remain constant.</entry> <row><entry></entry></row> <row> + <entry spanname="id"><constant>V4L2_CID_EXPOSURE_BIAS</constant> </entry> + <entry>integer menu</entry> + </row><row><entry spanname="descr"> Determines the automatic +exposure compensation, it is effective only when <constant>V4L2_CID_EXPOSURE_AUTO</constant> +control is set to <constant>AUTO</constant>, <constant>SHUTTER_PRIORITY </constant> +or <constant>APERTURE_PRIORITY</constant>. +It is expressed in terms of EV, drivers should interpret the values as 0.001 EV +units, where the value 1000 stands for +1 EV. +<para>Increasing the exposure compensation value is equivalent to decreasing +the exposure value (EV) and will increase the amount of light at the image +sensor. The camera performs the exposure compensation by adjusting absolute +exposure time and/or aperture.</para></entry> + </row> + <row><entry></entry></row> + + <row id="v4l2-exposure-metering"> + <entry spanname="id"><constant>V4L2_CID_EXPOSURE_METERING</constant> </entry> + <entry>enum v4l2_exposure_metering</entry> + </row><row><entry spanname="descr">Determines how the camera measures +the amount of light available for the frame exposure. Possible values are:</entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry><constant>V4L2_EXPOSURE_METERING_AVERAGE</constant> </entry> + <entry>Use the light information coming from the entire frame +and average giving no weighting to any particular portion of the metered area. + </entry> + </row> + <row> + <entry><constant>V4L2_EXPOSURE_METERING_CENTER_WEIGHTED</constant> </entry> + <entry>Average the light information coming from the entire frame +giving priority to the center of the metered area.</entry> + </row> + <row> + <entry><constant>V4L2_EXPOSURE_METERING_SPOT</constant> </entry> + <entry>Measure only very small area at the center of the frame.</entry> + </row> + </tbody> + </entrytbl> + </row> + <row><entry></entry></row> + + <row> <entry spanname="id"><constant>V4L2_CID_PAN_RELATIVE</constant> </entry> <entry>integer</entry> </row><row><entry spanname="descr">This control turns the @@ -2857,13 +2976,107 @@ negative values towards infinity. This is a write-only control.</entry> <row> <entry spanname="id"><constant>V4L2_CID_FOCUS_AUTO</constant> </entry> <entry>boolean</entry> - </row><row><entry spanname="descr">Enables automatic focus -adjustments. The effect of manual focus adjustments while this feature + </row><row><entry spanname="descr">Enables continuous automatic +focus adjustments. The effect of manual focus adjustments while this feature is enabled is undefined, drivers should ignore such requests.</entry> </row> <row><entry></entry></row> <row> + <entry spanname="id"><constant>V4L2_CID_AUTO_FOCUS_START</constant> </entry> + <entry>button</entry> + </row><row><entry spanname="descr">Starts single auto focus process. +The effect of setting this control when <constant>V4L2_CID_FOCUS_AUTO</constant> +is set to <constant>TRUE</constant> (1) is undefined, drivers should ignore +such requests.</entry> + </row> + <row><entry></entry></row> + + <row> + <entry spanname="id"><constant>V4L2_CID_AUTO_FOCUS_STOP</constant> </entry> + <entry>button</entry> + </row><row><entry spanname="descr">Aborts automatic focusing +started with <constant>V4L2_CID_AUTO_FOCUS_START</constant> control. It is +effective only when the continuous autofocus is disabled, that is when +<constant>V4L2_CID_FOCUS_AUTO</constant> control is set to <constant>FALSE +</constant> (0).</entry> + </row> + <row><entry></entry></row> + + <row id="v4l2-auto-focus-status"> + <entry spanname="id"> + <constant>V4L2_CID_AUTO_FOCUS_STATUS</constant> </entry> + <entry>bitmask</entry> + </row> + <row><entry spanname="descr">The automatic focus status. This is a read-only + control.</entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry><constant>V4L2_AUTO_FOCUS_STATUS_IDLE</constant> </entry> + <entry>Automatic focus is not active.</entry> + </row> + <row> + <entry><constant>V4L2_AUTO_FOCUS_STATUS_BUSY</constant> </entry> + <entry>Automatic focusing is in progress.</entry> + </row> + <row> + <entry><constant>V4L2_AUTO_FOCUS_STATUS_REACHED</constant> </entry> + <entry>Focus has been reached.</entry> + </row> + <row> + <entry><constant>V4L2_AUTO_FOCUS_STATUS_FAILED</constant> </entry> + <entry>Automatic focus has failed, the driver will not + transition from this state until another action is + performed by an application.</entry> + </row> + </tbody> + </entrytbl> + </row> + <row><entry spanname="descr"> +Setting <constant>V4L2_LOCK_FOCUS</constant> lock bit of the <constant>V4L2_CID_3A_LOCK +</constant> control may stop updates of the <constant>V4L2_CID_AUTO_FOCUS_STATUS</constant> +control value.</entry> + </row> + <row><entry></entry></row> + + <row id="v4l2-auto-focus-range"> + <entry spanname="id"> + <constant>V4L2_CID_AUTO_FOCUS_RANGE</constant> </entry> + <entry>enum v4l2_auto_focus_range</entry> + </row> + <row><entry spanname="descr">Determines auto focus distance range +for which lens may be adjusted. </entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry><constant>V4L2_AUTO_FOCUS_RANGE_AUTO</constant> </entry> + <entry>The camera automatically selects the focus range.</entry> + </row> + <row> + <entry><constant>V4L2_AUTO_FOCUS_RANGE_NORMAL</constant> </entry> + <entry>Normal distance range, limited for best automatic focus +performance.</entry> + </row> + <row> + <entry><constant>V4L2_AUTO_FOCUS_RANGE_MACRO</constant> </entry> + <entry>Macro (close-up) auto focus. The camera will +use its minimum possible distance for auto focus.</entry> + </row> + <row> + <entry><constant>V4L2_AUTO_FOCUS_RANGE_INFINITY</constant> </entry> + <entry>The lens is set to focus on an object at infinite distance.</entry> + </row> + </tbody> + </entrytbl> + </row> + <row><entry></entry></row> + + <row> <entry spanname="id"><constant>V4L2_CID_ZOOM_ABSOLUTE</constant> </entry> <entry>integer</entry> </row><row><entry spanname="descr">Specify the objective lens @@ -2932,6 +3145,295 @@ camera sensor on or off, or specify its strength. Such band-stop filters can be used, for example, to filter out the fluorescent light component.</entry> </row> <row><entry></entry></row> + + <row id="v4l2-auto-n-preset-white-balance"> + <entry spanname="id"><constant>V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE</constant> </entry> + <entry>enum v4l2_auto_n_preset_white_balance</entry> + </row><row><entry spanname="descr">Sets white balance to automatic, +manual or a preset. The presets determine color temperature of the light as +a hint to the camera for white balance adjustments resulting in most accurate +color representation. The following white balance presets are listed in order +of increasing color temperature.</entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry><constant>V4L2_WHITE_BALANCE_MANUAL</constant> </entry> + <entry>Manual white balance.</entry> + </row> + <row> + <entry><constant>V4L2_WHITE_BALANCE_AUTO</constant> </entry> + <entry>Automatic white balance adjustments.</entry> + </row> + <row> + <entry><constant>V4L2_WHITE_BALANCE_INCANDESCENT</constant> </entry> + <entry>White balance setting for incandescent (tungsten) lighting. +It generally cools down the colors and corresponds approximately to 2500...3500 K +color temperature range.</entry> + </row> + <row> + <entry><constant>V4L2_WHITE_BALANCE_FLUORESCENT</constant> </entry> + <entry>White balance preset for fluorescent lighting. +It corresponds approximately to 4000...5000 K color temperature.</entry> + </row> + <row> + <entry><constant>V4L2_WHITE_BALANCE_FLUORESCENT_H</constant> </entry> + <entry>With this setting the camera will compensate for +fluorescent H lighting.</entry> + </row> + <row> + <entry><constant>V4L2_WHITE_BALANCE_HORIZON</constant> </entry> + <entry>White balance setting for horizon daylight. +It corresponds approximately to 5000 K color temperature.</entry> + </row> + <row> + <entry><constant>V4L2_WHITE_BALANCE_DAYLIGHT</constant> </entry> + <entry>White balance preset for daylight (with clear sky). +It corresponds approximately to 5000...6500 K color temperature.</entry> + </row> + <row> + <entry><constant>V4L2_WHITE_BALANCE_FLASH</constant> </entry> + <entry>With this setting the camera will compensate for the flash +light. It slightly warms up the colors and corresponds roughly to 5000...5500 K +color temperature.</entry> + </row> + <row> + <entry><constant>V4L2_WHITE_BALANCE_CLOUDY</constant> </entry> + <entry>White balance preset for moderately overcast sky. +This option corresponds approximately to 6500...8000 K color temperature +range.</entry> + </row> + <row> + <entry><constant>V4L2_WHITE_BALANCE_SHADE</constant> </entry> + <entry>White balance preset for shade or heavily overcast +sky. It corresponds approximately to 9000...10000 K color temperature. +</entry> + </row> + </tbody> + </entrytbl> + </row> + <row><entry></entry></row> + + <row id="v4l2-wide-dynamic-range"> + <entry spanname="id"><constant>V4L2_CID_WIDE_DYNAMIC_RANGE</constant></entry> + <entry>boolean</entry> + </row> + <row> + <entry spanname="descr">Enables or disables the camera's wide dynamic +range feature. This feature allows to obtain clear images in situations where +intensity of the illumination varies significantly throughout the scene, i.e. +there are simultaneously very dark and very bright areas. It is most commonly +realized in cameras by combining two subsequent frames with different exposure +times. <footnote id="ctypeconv"><para> This control may be changed to a menu +control in the future, if more options are required.</para></footnote></entry> + </row> + <row><entry></entry></row> + + <row id="v4l2-image-stabilization"> + <entry spanname="id"><constant>V4L2_CID_IMAGE_STABILIZATION</constant></entry> + <entry>boolean</entry> + </row> + <row> + <entry spanname="descr">Enables or disables image stabilization. + <footnoteref linkend="ctypeconv"/></entry> + </row> + <row><entry></entry></row> + + <row> + <entry spanname="id"><constant>V4L2_CID_ISO_SENSITIVITY</constant> </entry> + <entry>integer menu</entry> + </row><row><entry spanname="descr">Determines ISO equivalent of an +image sensor indicating the sensor's sensitivity to light. The numbers are +expressed in arithmetic scale, as per <xref linkend="iso12232" /> standard, +where doubling the sensor sensitivity is represented by doubling the numerical +ISO value. Applications should interpret the values as standard ISO values +multiplied by 1000, e.g. control value 800 stands for ISO 0.8. Drivers will +usually support only a subset of standard ISO values. The effect of setting +this control while the <constant>V4L2_CID_ISO_SENSITIVITY_AUTO</constant> +control is set to a value other than <constant>V4L2_CID_ISO_SENSITIVITY_MANUAL +</constant> is undefined, drivers should ignore such requests.</entry> + </row> + <row><entry></entry></row> + + <row id="v4l2-iso-sensitivity-auto-type"> + <entry spanname="id"><constant>V4L2_CID_ISO_SENSITIVITY_AUTO</constant> </entry> + <entry>enum v4l2_iso_sensitivity_type</entry> + </row><row><entry spanname="descr">Enables or disables automatic ISO +sensitivity adjustments.</entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry><constant>V4L2_CID_ISO_SENSITIVITY_MANUAL</constant> </entry> + <entry>Manual ISO sensitivity.</entry> + </row> + <row> + <entry><constant>V4L2_CID_ISO_SENSITIVITY_AUTO</constant> </entry> + <entry>Automatic ISO sensitivity adjustments.</entry> + </row> + </tbody> + </entrytbl> + </row> + <row><entry></entry></row> + + <row id="v4l2-scene-mode"> + <entry spanname="id"><constant>V4L2_CID_SCENE_MODE</constant> </entry> + <entry>enum v4l2_scene_mode</entry> + </row><row><entry spanname="descr">This control allows to select +scene programs as the camera automatic modes optimized for common shooting +scenes. Within these modes the camera determines best exposure, aperture, +focusing, light metering, white balance and equivalent sensitivity. The +controls of those parameters are influenced by the scene mode control. +An exact behavior in each mode is subject to the camera specification. + +<para>When the scene mode feature is not used, this control should be set to +<constant>V4L2_SCENE_MODE_NONE</constant> to make sure the other possibly +related controls are accessible. The following scene programs are defined: +</para> +</entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry><constant>V4L2_SCENE_MODE_NONE</constant> </entry> + <entry>The scene mode feature is disabled.</entry> + </row> + <row> + <entry><constant>V4L2_SCENE_MODE_BACKLIGHT</constant> </entry> + <entry>Backlight. Compensates for dark shadows when light is + coming from behind a subject, also by automatically turning + on the flash.</entry> + </row> + <row> + <entry><constant>V4L2_SCENE_MODE_BEACH_SNOW</constant> </entry> + <entry>Beach and snow. This mode compensates for all-white or +bright scenes, which tend to look gray and low contrast, when camera's automatic +exposure is based on an average scene brightness. To compensate, this mode +automatically slightly overexposes the frames. The white balance may also be +adjusted to compensate for the fact that reflected snow looks bluish rather +than white.</entry> + </row> + <row> + <entry><constant>V4L2_SCENE_MODE_CANDLELIGHT</constant> </entry> + <entry>Candle light. The camera generally raises the ISO +sensitivity and lowers the shutter speed. This mode compensates for relatively +close subject in the scene. The flash is disabled in order to preserve the +ambiance of the light.</entry> + </row> + <row> + <entry><constant>V4L2_SCENE_MODE_DAWN_DUSK</constant> </entry> + <entry>Dawn and dusk. Preserves the colors seen in low +natural light before dusk and after down. The camera may turn off the flash, +and automatically focus at infinity. It will usually boost saturation and +lower the shutter speed.</entry> + </row> + <row> + <entry><constant>V4L2_SCENE_MODE_FALL_COLORS</constant> </entry> + <entry>Fall colors. Increases saturation and adjusts white +balance for color enhancement. Pictures of autumn leaves get saturated reds +and yellows.</entry> + </row> + <row> + <entry><constant>V4L2_SCENE_MODE_FIREWORKS</constant> </entry> + <entry>Fireworks. Long exposure times are used to capture +the expanding burst of light from a firework. The camera may invoke image +stabilization.</entry> + </row> + <row> + <entry><constant>V4L2_SCENE_MODE_LANDSCAPE</constant> </entry> + <entry>Landscape. The camera may choose a small aperture to +provide deep depth of field and long exposure duration to help capture detail +in dim light conditions. The focus is fixed at infinity. Suitable for distant +and wide scenery.</entry> + </row> + <row> + <entry><constant>V4L2_SCENE_MODE_NIGHT</constant> </entry> + <entry>Night, also known as Night Landscape. Designed for low +light conditions, it preserves detail in the dark areas without blowing out bright +objects. The camera generally sets itself to a medium-to-high ISO sensitivity, +with a relatively long exposure time, and turns flash off. As such, there will be +increased image noise and the possibility of blurred image.</entry> + </row> + <row> + <entry><constant>V4L2_SCENE_MODE_PARTY_INDOOR</constant> </entry> + <entry>Party and indoor. Designed to capture indoor scenes +that are lit by indoor background lighting as well as the flash. The camera +usually increases ISO sensitivity, and adjusts exposure for the low light +conditions.</entry> + </row> + <row> + <entry><constant>V4L2_SCENE_MODE_PORTRAIT</constant> </entry> + <entry>Portrait. The camera adjusts the aperture so that the +depth of field is reduced, which helps to isolate the subject against a smooth +background. Most cameras recognize the presence of faces in the scene and focus +on them. The color hue is adjusted to enhance skin tones. The intensity of the +flash is often reduced.</entry> + </row> + <row> + <entry><constant>V4L2_SCENE_MODE_SPORTS</constant> </entry> + <entry>Sports. Significantly increases ISO and uses a fast +shutter speed to freeze motion of rapidly-moving subjects. Increased image +noise may be seen in this mode.</entry> + </row> + <row> + <entry><constant>V4L2_SCENE_MODE_SUNSET</constant> </entry> + <entry>Sunset. Preserves deep hues seen in sunsets and +sunrises. It bumps up the saturation.</entry> + </row> + <row> + <entry><constant>V4L2_SCENE_MODE_TEXT</constant> </entry> + <entry>Text. It applies extra contrast and sharpness, it is +typically a black-and-white mode optimized for readability. Automatic focus +may be switched to close-up mode and this setting may also involve some +lens-distortion correction.</entry> + </row> + </tbody> + </entrytbl> + </row> + <row><entry></entry></row> + + <row> + <entry spanname="id"><constant>V4L2_CID_3A_LOCK</constant></entry> + <entry>bitmask</entry> + </row> + <row> + <entry spanname="descr">This control locks or unlocks the automatic +focus, exposure and white balance. The automatic adjustments can be paused +independently by setting the corresponding lock bit to 1. The camera then retains +the settings until the lock bit is cleared. The following lock bits are defined: +</entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry><constant>V4L2_LOCK_EXPOSURE</constant></entry> + <entry>Automatic exposure adjustments lock.</entry> + </row> + <row> + <entry><constant>V4L2_LOCK_WHITE_BALANCE</constant></entry> + <entry>Automatic white balance adjustments lock.</entry> + </row> + <row> + <entry><constant>V4L2_LOCK_FOCUS</constant></entry> + <entry>Automatic focus lock.</entry> + </row> + </tbody> + </entrytbl> + </row> + <row><entry spanname="descr"> +When a given algorithm is not enabled, drivers should ignore requests +to lock it and should return no error. An example might be an application +setting bit <constant>V4L2_LOCK_WHITE_BALANCE</constant> when the +<constant>V4L2_CID_AUTO_WHITE_BALANCE</constant> control is set to +<constant>FALSE</constant>. The value of this control may be changed +by exposure, white balance or focus controls.</entry> + </row> + <row><entry></entry></row> + </tbody> </tgroup> </table> @@ -3476,7 +3978,7 @@ interface and may change in the future.</para> <entry spanname="id"><constant>V4L2_CID_JPEG_CHROMA_SUBSAMPLING</constant></entry> <entry>menu</entry> </row> - <row id="jpeg-chroma-subsampling-control"> + <row id="v4l2-jpeg-chroma-subsampling"> <entry spanname="descr">The chroma subsampling factors describe how each component of an input image is sampled, in respect to maximum sample rate in each spatial dimension. See <xref linkend="itu-t81"/>, @@ -3486,7 +3988,7 @@ interface and may change in the future.</para> from RGB to Y'CbCr color space. </entry> </row> - <row> + <row id = "v4l2-jpeg-chroma-subsampling"> <entrytbl spanname="descr" cols="2"> <tbody valign="top"> <row> @@ -3538,12 +4040,12 @@ interface and may change in the future.</para> </entry> </row> <row id="jpeg-quality-control"> - <entry spanname="id"><constant>V4L2_CID_JPEG_COMPRESION_QUALITY</constant></entry> + <entry spanname="id"><constant>V4L2_CID_JPEG_COMPRESSION_QUALITY</constant></entry> <entry>integer</entry> </row> <row> <entry spanname="descr"> - <constant>V4L2_CID_JPEG_COMPRESION_QUALITY</constant> control + <constant>V4L2_CID_JPEG_COMPRESSION_QUALITY</constant> control determines trade-off between image quality and size. It provides simpler method for applications to control image quality, without a need for direct reconfiguration of luminance and chrominance @@ -3551,7 +4053,7 @@ interface and may change in the future.</para> In cases where a driver uses quantization tables configured directly by an application, using interfaces defined elsewhere, <constant> - V4L2_CID_JPEG_COMPRESION_QUALITY</constant> control should be set + V4L2_CID_JPEG_COMPRESSION_QUALITY</constant> control should be set by driver to 0. <para>The value range of this control is driver-specific. Only @@ -3599,4 +4101,172 @@ interface and may change in the future.</para> to <xref linkend="itu-t81"/>, <xref linkend="jfif"/>, <xref linkend="w3c-jpeg-jfif"/>.</para> </section> + + <section id="image-source-controls"> + <title>Image Source Control Reference</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 Image Source control class is intended for low-level + control of image source devices such as image sensors. The + devices feature an analogue to digital converter and a bus + transmitter to transmit the image data out of the device. + </para> + + <table pgwide="1" frame="none" id="image-source-control-id"> + <title>Image Source Control IDs</title> + + <tgroup cols="4"> + <colspec colname="c1" colwidth="1*" /> + <colspec colname="c2" colwidth="6*" /> + <colspec colname="c3" colwidth="2*" /> + <colspec colname="c4" colwidth="6*" /> + <spanspec namest="c1" nameend="c2" spanname="id" /> + <spanspec namest="c2" nameend="c4" spanname="descr" /> + <thead> + <row> + <entry spanname="id" align="left">ID</entry> + <entry align="left">Type</entry> + </row><row rowsep="1"><entry spanname="descr" align="left">Description</entry> + </row> + </thead> + <tbody valign="top"> + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_IMAGE_SOURCE_CLASS</constant></entry> + <entry>class</entry> + </row> + <row> + <entry spanname="descr">The IMAGE_SOURCE class descriptor.</entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_VBLANK</constant></entry> + <entry>integer</entry> + </row> + <row> + <entry spanname="descr">Vertical blanking. The idle period + after every frame during which no image data is produced. + The unit of vertical blanking is a line. Every line has + length of the image width plus horizontal blanking at the + pixel rate defined by + <constant>V4L2_CID_PIXEL_RATE</constant> control in the + same sub-device.</entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_HBLANK</constant></entry> + <entry>integer</entry> + </row> + <row> + <entry spanname="descr">Horizontal blanking. The idle + period after every line of image data during which no + image data is produced. The unit of horizontal blanking is + pixels.</entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_ANALOGUE_GAIN</constant></entry> + <entry>integer</entry> + </row> + <row> + <entry spanname="descr">Analogue gain is gain affecting + all colour components in the pixel matrix. The gain + operation is performed in the analogue domain before A/D + conversion. + </entry> + </row> + <row><entry></entry></row> + </tbody> + </tgroup> + </table> + + </section> + + <section id="image-process-controls"> + <title>Image Process Control Reference</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 Image Source control class is intended for low-level control of + image processing functions. Unlike + <constant>V4L2_CID_IMAGE_SOURCE_CLASS</constant>, the controls in + this class affect processing the image, and do not control capturing + of it. + </para> + + <table pgwide="1" frame="none" id="image-process-control-id"> + <title>Image Source Control IDs</title> + + <tgroup cols="4"> + <colspec colname="c1" colwidth="1*" /> + <colspec colname="c2" colwidth="6*" /> + <colspec colname="c3" colwidth="2*" /> + <colspec colname="c4" colwidth="6*" /> + <spanspec namest="c1" nameend="c2" spanname="id" /> + <spanspec namest="c2" nameend="c4" spanname="descr" /> + <thead> + <row> + <entry spanname="id" align="left">ID</entry> + <entry align="left">Type</entry> + </row><row rowsep="1"><entry spanname="descr" align="left">Description</entry> + </row> + </thead> + <tbody valign="top"> + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_IMAGE_PROC_CLASS</constant></entry> + <entry>class</entry> + </row> + <row> + <entry spanname="descr">The IMAGE_PROC class descriptor.</entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_LINK_FREQ</constant></entry> + <entry>integer menu</entry> + </row> + <row> + <entry spanname="descr">Data bus frequency. Together with the + media bus pixel code, bus type (clock cycles per sample), the + data bus frequency defines the pixel rate + (<constant>V4L2_CID_PIXEL_RATE</constant>) in the + pixel array (or possibly elsewhere, if the device is not an + image sensor). The frame rate can be calculated from the pixel + clock, image width and height and horizontal and vertical + blanking. While the pixel rate control may be defined elsewhere + than in the subdev containing the pixel array, the frame rate + cannot be obtained from that information. This is because only + on the pixel array it can be assumed that the vertical and + horizontal blanking information is exact: no other blanking is + allowed in the pixel array. The selection of frame rate is + performed by selecting the desired horizontal and vertical + blanking. The unit of this control is Hz. </entry> + </row> + <row> + <entry spanname="id"><constant>V4L2_CID_PIXEL_RATE</constant></entry> + <entry>64-bit integer</entry> + </row> + <row> + <entry spanname="descr">Pixel rate in the source pads of + the subdev. This control is read-only and its unit is + pixels / second. + </entry> + </row> + <row><entry></entry></row> + </tbody> + </tgroup> + </table> + + </section> </section> diff --git a/Documentation/DocBook/media/v4l/dev-subdev.xml b/Documentation/DocBook/media/v4l/dev-subdev.xml index 0916a7343a16..4afcbbec5eda 100644 --- a/Documentation/DocBook/media/v4l/dev-subdev.xml +++ b/Documentation/DocBook/media/v4l/dev-subdev.xml @@ -76,11 +76,12 @@ <wordasword>format</wordasword> means the combination of media bus data format, frame width and frame height.</para></note> - <para>Image formats are typically negotiated on video capture and output - devices using the <link linkend="crop">cropping and scaling</link> ioctls. - The driver is responsible for configuring every block in the video pipeline - according to the requested format at the pipeline input and/or - output.</para> + <para>Image formats are typically negotiated on video capture and + output devices using the format and <link + linkend="vidioc-subdev-g-selection">selection</link> ioctls. The + driver is responsible for configuring every block in the video + pipeline according to the requested format at the pipeline input + and/or output.</para> <para>For complex devices, such as often found in embedded systems, identical image sizes at the output of a pipeline can be achieved using @@ -276,11 +277,11 @@ </section> <section> - <title>Cropping and scaling</title> + <title>Selections: cropping, scaling and composition</title> <para>Many sub-devices support cropping frames on their input or output pads (or possible even on both). Cropping is used to select the area of - interest in an image, typically on a video sensor or video decoder. It can + interest in an image, typically on an image sensor or a video decoder. It can also be used as part of digital zoom implementations to select the area of the image that will be scaled up.</para> @@ -288,26 +289,179 @@ &v4l2-rect; by the coordinates of the top left corner and the rectangle size. Both the coordinates and sizes are expressed in pixels.</para> - <para>The crop rectangle is retrieved and set using the - &VIDIOC-SUBDEV-G-CROP; and &VIDIOC-SUBDEV-S-CROP; ioctls. Like for pad - formats, drivers store try and active crop rectangles. The format - negotiation mechanism applies to crop settings as well.</para> - - <para>On input pads, cropping is applied relatively to the current pad - format. The pad format represents the image size as received by the - sub-device from the previous block in the pipeline, and the crop rectangle - represents the sub-image that will be transmitted further inside the - sub-device for processing. The crop rectangle be entirely containted - inside the input image size.</para> - - <para>Input crop rectangle are reset to their default value when the input - image format is modified. Drivers should use the input image size as the - crop rectangle default value, but hardware requirements may prevent this. - </para> + <para>As for pad formats, drivers store try and active + rectangles for the selection targets of ACTUAL type <xref + linkend="v4l2-subdev-selection-targets">.</xref></para> + + <para>On sink pads, cropping is applied relative to the + current pad format. The pad format represents the image size as + received by the sub-device from the previous block in the + pipeline, and the crop rectangle represents the sub-image that + will be transmitted further inside the sub-device for + processing.</para> + + <para>The scaling operation changes the size of the image by + scaling it to new dimensions. The scaling ratio isn't specified + explicitly, but is implied from the original and scaled image + sizes. Both sizes are represented by &v4l2-rect;.</para> + + <para>Scaling support is optional. When supported by a subdev, + the crop rectangle on the subdev's sink pad is scaled to the + size configured using the &VIDIOC-SUBDEV-S-SELECTION; IOCTL + using <constant>V4L2_SUBDEV_SEL_COMPOSE_ACTUAL</constant> + selection target on the same pad. If the subdev supports scaling + but not composing, the top and left values are not used and must + always be set to zero.</para> + + <para>On source pads, cropping is similar to sink pads, with the + exception that the source size from which the cropping is + performed, is the COMPOSE rectangle on the sink pad. In both + sink and source pads, the crop rectangle must be entirely + contained inside the source image size for the crop + operation.</para> + + <para>The drivers should always use the closest possible + rectangle the user requests on all selection targets, unless + specifically told otherwise. + <constant>V4L2_SUBDEV_SEL_FLAG_SIZE_GE</constant> and + <constant>V4L2_SUBDEV_SEL_FLAG_SIZE_LE</constant> flags may be + used to round the image size either up or down. <xref + linkend="v4l2-subdev-selection-flags"></xref></para> + </section> + + <section> + <title>Types of selection targets</title> + + <section> + <title>ACTUAL targets</title> + + <para>ACTUAL targets reflect the actual hardware configuration + at any point of time. There is a BOUNDS target + corresponding to every ACTUAL.</para> + </section> + + <section> + <title>BOUNDS targets</title> + + <para>BOUNDS targets is the smallest rectangle that contains + all valid ACTUAL rectangles. It may not be possible to set the + ACTUAL rectangle as large as the BOUNDS rectangle, however. + This may be because e.g. a sensor's pixel array is not + rectangular but cross-shaped or round. The maximum size may + also be smaller than the BOUNDS rectangle.</para> + </section> - <para>Cropping behaviour on output pads is not defined.</para> + </section> + + <section> + <title>Order of configuration and format propagation</title> + + <para>Inside subdevs, the order of image processing steps will + always be from the sink pad towards the source pad. This is also + reflected in the order in which the configuration must be + performed by the user: the changes made will be propagated to + any subsequent stages. If this behaviour is not desired, the + user must set + <constant>V4L2_SUBDEV_SEL_FLAG_KEEP_CONFIG</constant> flag. This + flag causes no propagation of the changes are allowed in any + circumstances. This may also cause the accessed rectangle to be + adjusted by the driver, depending on the properties of the + underlying hardware.</para> + + <para>The coordinates to a step always refer to the actual size + of the previous step. The exception to this rule is the source + compose rectangle, which refers to the sink compose bounds + rectangle --- if it is supported by the hardware.</para> + + <orderedlist> + <listitem>Sink pad format. The user configures the sink pad + format. This format defines the parameters of the image the + entity receives through the pad for further processing.</listitem> + + <listitem>Sink pad actual crop selection. The sink pad crop + defines the crop performed to the sink pad format.</listitem> + + <listitem>Sink pad actual compose selection. The size of the + sink pad compose rectangle defines the scaling ratio compared + to the size of the sink pad crop rectangle. The location of + the compose rectangle specifies the location of the actual + sink compose rectangle in the sink compose bounds + rectangle.</listitem> + + <listitem>Source pad actual crop selection. Crop on the source + pad defines crop performed to the image in the sink compose + bounds rectangle.</listitem> + + <listitem>Source pad format. The source pad format defines the + output pixel format of the subdev, as well as the other + parameters with the exception of the image width and height. + Width and height are defined by the size of the source pad + actual crop selection.</listitem> + </orderedlist> + + <para>Accessing any of the above rectangles not supported by the + subdev will return <constant>EINVAL</constant>. Any rectangle + referring to a previous unsupported rectangle coordinates will + instead refer to the previous supported rectangle. For example, + if sink crop is not supported, the compose selection will refer + to the sink pad format dimensions instead.</para> + + <figure id="subdev-image-processing-crop"> + <title>Image processing in subdevs: simple crop example</title> + <mediaobject> + <imageobject> + <imagedata fileref="subdev-image-processing-crop.svg" + format="SVG" scale="200" /> + </imageobject> + </mediaobject> + </figure> + + <para>In the above example, the subdev supports cropping on its + sink pad. To configure it, the user sets the media bus format on + the subdev's sink pad. Now the actual crop rectangle can be set + on the sink pad --- the location and size of this rectangle + reflect the location and size of a rectangle to be cropped from + the sink format. The size of the sink crop rectangle will also + be the size of the format of the subdev's source pad.</para> + + <figure id="subdev-image-processing-scaling-multi-source"> + <title>Image processing in subdevs: scaling with multiple sources</title> + <mediaobject> + <imageobject> + <imagedata fileref="subdev-image-processing-scaling-multi-source.svg" + format="SVG" scale="200" /> + </imageobject> + </mediaobject> + </figure> + + <para>In this example, the subdev is capable of first cropping, + then scaling and finally cropping for two source pads + individually from the resulting scaled image. The location of + the scaled image in the cropped image is ignored in sink compose + target. Both of the locations of the source crop rectangles + refer to the sink scaling rectangle, independently cropping an + area at location specified by the source crop rectangle from + it.</para> + + <figure id="subdev-image-processing-full"> + <title>Image processing in subdevs: scaling and composition + with multiple sinks and sources</title> + <mediaobject> + <imageobject> + <imagedata fileref="subdev-image-processing-full.svg" + format="SVG" scale="200" /> + </imageobject> + </mediaobject> + </figure> + + <para>The subdev driver supports two sink pads and two source + pads. The images from both of the sink pads are individually + cropped, then scaled and further composed on the composition + bounds rectangle. From that, two independent streams are cropped + and sent out of the subdev from the source pads.</para> </section> + </section> &sub-subdev-formats; diff --git a/Documentation/DocBook/media/v4l/io.xml b/Documentation/DocBook/media/v4l/io.xml index b815929b5bba..fd6aca2922b6 100644 --- a/Documentation/DocBook/media/v4l/io.xml +++ b/Documentation/DocBook/media/v4l/io.xml @@ -543,12 +543,13 @@ and can range from zero to the number of buffers allocated with the &VIDIOC-REQBUFS; ioctl (&v4l2-requestbuffers; <structfield>count</structfield>) minus one.</entry> </row> <row> - <entry>&v4l2-buf-type;</entry> + <entry>__u32</entry> <entry><structfield>type</structfield></entry> <entry></entry> <entry>Type of the buffer, same as &v4l2-format; <structfield>type</structfield> or &v4l2-requestbuffers; -<structfield>type</structfield>, set by the application.</entry> +<structfield>type</structfield>, set by the application. See <xref +linkend="v4l2-buf-type" /></entry> </row> <row> <entry>__u32</entry> @@ -568,7 +569,7 @@ refers to an input stream, applications when an output stream.</entry> linkend="buffer-flags" />.</entry> </row> <row> - <entry>&v4l2-field;</entry> + <entry>__u32</entry> <entry><structfield>field</structfield></entry> <entry></entry> <entry>Indicates the field order of the image in the @@ -630,11 +631,12 @@ bandwidth. These devices identify by not enumerating any video standards, see <xref linkend="standard" />.</para></entry> </row> <row> - <entry>&v4l2-memory;</entry> + <entry>__u32</entry> <entry><structfield>memory</structfield></entry> <entry></entry> <entry>This field must be set by applications and/or drivers -in accordance with the selected I/O method.</entry> +in accordance with the selected I/O method. See <xref linkend="v4l2-memory" + /></entry> </row> <row> <entry>union</entry> diff --git a/Documentation/DocBook/media/v4l/pixfmt-srggb10.xml b/Documentation/DocBook/media/v4l/pixfmt-srggb10.xml index 7b274092e60c..c1c62a9acc2a 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-srggb10.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-srggb10.xml @@ -1,4 +1,4 @@ - <refentry> + <refentry id="pixfmt-srggb10"> <refmeta> <refentrytitle>V4L2_PIX_FMT_SRGGB10 ('RG10'), V4L2_PIX_FMT_SGRBG10 ('BA10'), diff --git a/Documentation/DocBook/media/v4l/pixfmt-srggb10dpcm8.xml b/Documentation/DocBook/media/v4l/pixfmt-srggb10dpcm8.xml new file mode 100644 index 000000000000..8eace3e2e7d4 --- /dev/null +++ b/Documentation/DocBook/media/v4l/pixfmt-srggb10dpcm8.xml @@ -0,0 +1,29 @@ + <refentry id="pixfmt-srggb10dpcm8"> + <refmeta> + <refentrytitle> + V4L2_PIX_FMT_SBGGR10DPCM8 ('bBA8'), + V4L2_PIX_FMT_SGBRG10DPCM8 ('bGA8'), + V4L2_PIX_FMT_SGRBG10DPCM8 ('BD10'), + V4L2_PIX_FMT_SRGGB10DPCM8 ('bRA8'), + </refentrytitle> + &manvol; + </refmeta> + <refnamediv> + <refname id="V4L2-PIX-FMT-SBGGR10DPCM8"><constant>V4L2_PIX_FMT_SBGGR10DPCM8</constant></refname> + <refname id="V4L2-PIX-FMT-SGBRG10DPCM8"><constant>V4L2_PIX_FMT_SGBRG10DPCM8</constant></refname> + <refname id="V4L2-PIX-FMT-SGRBG10DPCM8"><constant>V4L2_PIX_FMT_SGRBG10DPCM8</constant></refname> + <refname id="V4L2-PIX-FMT-SRGGB10DPCM8"><constant>V4L2_PIX_FMT_SRGGB10DPCM8</constant></refname> + <refpurpose>10-bit Bayer formats compressed to 8 bits</refpurpose> + </refnamediv> + <refsect1> + <title>Description</title> + + <para>The following four pixel formats are raw sRGB / Bayer formats + with 10 bits per colour compressed to 8 bits each, using DPCM + compression. DPCM, differential pulse-code modulation, is lossy. + Each colour component consumes 8 bits of memory. In other respects + this format is similar to <xref + linkend="pixfmt-srggb10">.</xref></para> + + </refsect1> + </refentry> diff --git a/Documentation/DocBook/media/v4l/pixfmt.xml b/Documentation/DocBook/media/v4l/pixfmt.xml index 31eaae2469f9..f5ac15ed0549 100644 --- a/Documentation/DocBook/media/v4l/pixfmt.xml +++ b/Documentation/DocBook/media/v4l/pixfmt.xml @@ -673,6 +673,7 @@ access the palette, this must be done with ioctls of the Linux framebuffer API.< &sub-srggb8; &sub-sbggr16; &sub-srggb10; + &sub-srggb10dpcm8; &sub-srggb12; </section> @@ -876,11 +877,6 @@ kernel sources in the file <filename>Documentation/video4linux/cx2341x/README.hm <entry>'S561'</entry> <entry>Compressed GBRG Bayer format used by the gspca driver.</entry> </row> - <row id="V4L2-PIX-FMT-SGRBG10DPCM8"> - <entry><constant>V4L2_PIX_FMT_SGRBG10DPCM8</constant></entry> - <entry>'DB10'</entry> - <entry>10 bit raw Bayer DPCM compressed to 8 bits.</entry> - </row> <row id="V4L2-PIX-FMT-PAC207"> <entry><constant>V4L2_PIX_FMT_PAC207</constant></entry> <entry>'P207'</entry> diff --git a/Documentation/DocBook/media/v4l/subdev-image-processing-crop.dia b/Documentation/DocBook/media/v4l/subdev-image-processing-crop.dia new file mode 100644 index 000000000000..e32ba5362e1d --- /dev/null +++ b/Documentation/DocBook/media/v4l/subdev-image-processing-crop.dia @@ -0,0 +1,614 @@ +<?xml version="1.0" encoding="UTF-8"?> +<dia:diagram xmlns:dia="http://www.lysator.liu.se/~alla/dia/"> + <dia:diagramdata> + <dia:attribute name="background"> + <dia:color val="#ffffff"/> + </dia:attribute> + <dia:attribute name="pagebreak"> + <dia:color val="#000099"/> + </dia:attribute> + <dia:attribute name="paper"> + <dia:composite type="paper"> + <dia:attribute name="name"> + <dia:string>#A4#</dia:string> + </dia:attribute> + <dia:attribute name="tmargin"> + <dia:real val="2.8222000598907471"/> + </dia:attribute> + <dia:attribute name="bmargin"> + <dia:real val="2.8222000598907471"/> + </dia:attribute> + <dia:attribute name="lmargin"> + <dia:real val="2.8222000598907471"/> + </dia:attribute> + <dia:attribute name="rmargin"> + <dia:real val="2.8222000598907471"/> + </dia:attribute> + <dia:attribute name="is_portrait"> + <dia:boolean val="false"/> + </dia:attribute> + <dia:attribute name="scaling"> + <dia:real val="0.49000000953674316"/> + </dia:attribute> + <dia:attribute name="fitto"> + <dia:boolean val="false"/> + </dia:attribute> + </dia:composite> + </dia:attribute> + <dia:attribute name="grid"> + <dia:composite type="grid"> + <dia:attribute name="width_x"> + <dia:real val="1"/> + </dia:attribute> + <dia:attribute name="width_y"> + <dia:real val="1"/> + </dia:attribute> + <dia:attribute name="visible_x"> + <dia:int val="1"/> + </dia:attribute> + <dia:attribute name="visible_y"> + <dia:int val="1"/> + </dia:attribute> + <dia:composite type="color"/> + </dia:composite> + </dia:attribute> + <dia:attribute name="color"> + <dia:color val="#d8e5e5"/> + </dia:attribute> + <dia:attribute name="guides"> + <dia:composite type="guides"> + <dia:attribute name="hguides"/> + <dia:attribute name="vguides"/> + </dia:composite> + </dia:attribute> + </dia:diagramdata> + <dia:layer name="Background" visible="true" active="true"> + <dia:object type="Standard - Box" version="0" id="O0"> + <dia:attribute name="obj_pos"> + <dia:point val="-0.4,6.5"/> + </dia:attribute> + <dia:attribute name="obj_bb"> + <dia:rectangle val="-0.45,6.45;23.1387,16.2"/> + </dia:attribute> + <dia:attribute name="elem_corner"> + <dia:point val="-0.4,6.5"/> + </dia:attribute> + <dia:attribute name="elem_width"> + <dia:real val="23.48871579904775"/> + </dia:attribute> + <dia:attribute name="elem_height"> + <dia:real val="9.6500000000000004"/> + </dia:attribute> + <dia:attribute name="border_width"> + <dia:real val="0.10000000149011612"/> + </dia:attribute> + <dia:attribute name="show_background"> + <dia:boolean val="false"/> + </dia:attribute> + </dia:object> + <dia:object type="Standard - Box" version="0" 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+ </g> + <g> + <line style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #a020f0" x1="546.908" y1="190.725" x2="495.383" y2="268.548"/> + <polygon style="fill: #a020f0" points="491.242,274.802 492.594,263.703 495.383,268.548 500.932,269.224 "/> + <polygon style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #a020f0" points="491.242,274.802 492.594,263.703 495.383,268.548 500.932,269.224 "/> + </g> +</svg> diff --git a/Documentation/DocBook/media/v4l/v4l2.xml b/Documentation/DocBook/media/v4l/v4l2.xml index 8ae38876172e..015c561754b7 100644 --- a/Documentation/DocBook/media/v4l/v4l2.xml +++ b/Documentation/DocBook/media/v4l/v4l2.xml @@ -28,8 +28,8 @@ documentation.</contrib> <firstname>Hans</firstname> <surname>Verkuil</surname> <contrib>Designed and documented the VIDIOC_LOG_STATUS ioctl, -the extended control ioctls and major parts of the sliced VBI -API.</contrib> +the extended control ioctls, major parts of the sliced VBI API, the +MPEG encoder and decoder APIs and the DV Timings API.</contrib> <affiliation> <address> <email>hverkuil@xs4all.nl</email> @@ -96,6 +96,17 @@ Remote Controller chapter.</contrib> </address> </affiliation> </author> + + <author> + <firstname>Sakari</firstname> + <surname>Ailus</surname> + <contrib>Subdev selections API.</contrib> + <affiliation> + <address> + <email>sakari.ailus@iki.fi</email> + </address> + </affiliation> + </author> </authorgroup> <copyright> @@ -112,6 +123,7 @@ Remote Controller chapter.</contrib> <year>2009</year> <year>2010</year> <year>2011</year> + <year>2012</year> <holder>Bill Dirks, Michael H. Schimek, Hans Verkuil, Martin Rubli, Andy Walls, Muralidharan Karicheri, Mauro Carvalho Chehab, Pawel Osciak</holder> @@ -128,6 +140,28 @@ structs, ioctls) must be noted in more detail in the history chapter applications. --> <revision> + <revnumber>3.5</revnumber> + <date>2012-05-07</date> + <authorinitials>sa, sn</authorinitials> + <revremark>Added V4L2_CTRL_TYPE_INTEGER_MENU and V4L2 subdev + selections API. Improved the description of V4L2_CID_COLORFX + control, added V4L2_CID_COLORFX_CBCR control. + Added camera controls V4L2_CID_AUTO_EXPOSURE_BIAS, + V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE, V4L2_CID_IMAGE_STABILIZATION, + V4L2_CID_ISO_SENSITIVITY, V4L2_CID_ISO_SENSITIVITY_AUTO, + V4L2_CID_EXPOSURE_METERING, V4L2_CID_SCENE_MODE, + V4L2_CID_3A_LOCK, V4L2_CID_AUTO_FOCUS_START, + V4L2_CID_AUTO_FOCUS_STOP, V4L2_CID_AUTO_FOCUS_STATUS + and V4L2_CID_AUTO_FOCUS_RANGE. + </revremark> + <date>2012-05-01</date> + <authorinitials>hv</authorinitials> + <revremark>Added VIDIOC_ENUM_DV_TIMINGS, VIDIOC_QUERY_DV_TIMINGS and + VIDIOC_DV_TIMINGS_CAP. + </revremark> + </revision> + + <revision> <revnumber>3.4</revnumber> <date>2012-01-25</date> <authorinitials>sn</authorinitials> @@ -433,7 +467,7 @@ and discussions on the V4L mailing list.</revremark> </partinfo> <title>Video for Linux Two API Specification</title> - <subtitle>Revision 3.3</subtitle> + <subtitle>Revision 3.5</subtitle> <chapter id="common"> &sub-common; @@ -491,10 +525,12 @@ and discussions on the V4L mailing list.</revremark> &sub-dbg-g-register; &sub-decoder-cmd; &sub-dqevent; + &sub-dv-timings-cap; &sub-encoder-cmd; &sub-enumaudio; &sub-enumaudioout; &sub-enum-dv-presets; + &sub-enum-dv-timings; &sub-enum-fmt; &sub-enum-framesizes; &sub-enum-frameintervals; @@ -529,6 +565,7 @@ and discussions on the V4L mailing list.</revremark> &sub-querycap; &sub-queryctrl; &sub-query-dv-preset; + &sub-query-dv-timings; &sub-querystd; &sub-prepare-buf; &sub-reqbufs; @@ -540,6 +577,7 @@ and discussions on the V4L mailing list.</revremark> &sub-subdev-g-crop; &sub-subdev-g-fmt; &sub-subdev-g-frame-interval; + &sub-subdev-g-selection; &sub-subscribe-event; <!-- End of ioctls. --> &sub-mmap; diff --git a/Documentation/DocBook/media/v4l/vidioc-create-bufs.xml b/Documentation/DocBook/media/v4l/vidioc-create-bufs.xml index 73ae8a6cd004..765549ff8a71 100644 --- a/Documentation/DocBook/media/v4l/vidioc-create-bufs.xml +++ b/Documentation/DocBook/media/v4l/vidioc-create-bufs.xml @@ -48,6 +48,12 @@ <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>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 @@ -94,16 +100,18 @@ information.</para> <entry>The number of buffers requested or granted.</entry> </row> <row> - <entry>&v4l2-memory;</entry> + <entry>__u32</entry> <entry><structfield>memory</structfield></entry> <entry>Applications set this field to <constant>V4L2_MEMORY_MMAP</constant> or -<constant>V4L2_MEMORY_USERPTR</constant>.</entry> +<constant>V4L2_MEMORY_USERPTR</constant>. See <xref linkend="v4l2-memory" +/></entry> </row> <row> - <entry>&v4l2-format;</entry> + <entry>__u32</entry> <entry><structfield>format</structfield></entry> - <entry>Filled in by the application, preserved by the driver.</entry> + <entry>Filled in by the application, preserved by the driver. + See <xref linkend="v4l2-format" />.</entry> </row> <row> <entry>__u32</entry> diff --git a/Documentation/DocBook/media/v4l/vidioc-cropcap.xml b/Documentation/DocBook/media/v4l/vidioc-cropcap.xml index b4f2f255211e..f1bac2c6e978 100644 --- a/Documentation/DocBook/media/v4l/vidioc-cropcap.xml +++ b/Documentation/DocBook/media/v4l/vidioc-cropcap.xml @@ -65,7 +65,7 @@ output.</para> &cs-str; <tbody valign="top"> <row> - <entry>&v4l2-buf-type;</entry> + <entry>__u32</entry> <entry><structfield>type</structfield></entry> <entry>Type of the data stream, set by the application. Only these types are valid here: @@ -73,7 +73,7 @@ Only these types are valid here: <constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant>, <constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant>, and custom (driver defined) types with code <constant>V4L2_BUF_TYPE_PRIVATE</constant> -and higher.</entry> +and higher. See <xref linkend="v4l2-buf-type" />.</entry> </row> <row> <entry>struct <link linkend="v4l2-rect-crop">v4l2_rect</link></entry> diff --git a/Documentation/DocBook/media/v4l/vidioc-dv-timings-cap.xml b/Documentation/DocBook/media/v4l/vidioc-dv-timings-cap.xml new file mode 100644 index 000000000000..6673ce582050 --- /dev/null +++ b/Documentation/DocBook/media/v4l/vidioc-dv-timings-cap.xml @@ -0,0 +1,211 @@ +<refentry id="vidioc-dv-timings-cap"> + <refmeta> + <refentrytitle>ioctl VIDIOC_DV_TIMINGS_CAP</refentrytitle> + &manvol; + </refmeta> + + <refnamediv> + <refname>VIDIOC_DV_TIMINGS_CAP</refname> + <refpurpose>The capabilities of the Digital Video receiver/transmitter</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <funcsynopsis> + <funcprototype> + <funcdef>int <function>ioctl</function></funcdef> + <paramdef>int <parameter>fd</parameter></paramdef> + <paramdef>int <parameter>request</parameter></paramdef> + <paramdef>struct v4l2_dv_timings_cap *<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_DV_TIMINGS_CAP</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>To query the available timings, applications initialize the +<structfield>index</structfield> field and zero the reserved array of &v4l2-dv-timings-cap; +and call the <constant>VIDIOC_DV_TIMINGS_CAP</constant> ioctl with a pointer to this +structure. Drivers fill the rest of the structure or return an +&EINVAL; when the index is out of bounds. To enumerate all supported DV timings, +applications shall begin at index zero, incrementing by one until the +driver returns <errorcode>EINVAL</errorcode>. Note that drivers may enumerate a +different set of DV timings after switching the video input or +output.</para> + + <table pgwide="1" frame="none" id="v4l2-bt-timings-cap"> + <title>struct <structname>v4l2_bt_timings_cap</structname></title> + <tgroup cols="3"> + &cs-str; + <tbody valign="top"> + <row> + <entry>__u32</entry> + <entry><structfield>min_width</structfield></entry> + <entry>Minimum width of the active video in pixels.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>max_width</structfield></entry> + <entry>Maximum width of the active video in pixels.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>min_height</structfield></entry> + <entry>Minimum height of the active video in lines.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>max_height</structfield></entry> + <entry>Maximum height of the active video in lines.</entry> + </row> + <row> + <entry>__u64</entry> + <entry><structfield>min_pixelclock</structfield></entry> + <entry>Minimum pixelclock frequency in Hz.</entry> + </row> + <row> + <entry>__u64</entry> + <entry><structfield>max_pixelclock</structfield></entry> + <entry>Maximum pixelclock frequency in Hz.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>standards</structfield></entry> + <entry>The video standard(s) supported by the hardware. + See <xref linkend="dv-bt-standards"/> for a list of standards.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>capabilities</structfield></entry> + <entry>Several flags giving more information about the capabilities. + See <xref linkend="dv-bt-cap-capabilities"/> for a description of the flags. + </entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>reserved</structfield>[16]</entry> + <entry></entry> + </row> + </tbody> + </tgroup> + </table> + + <table pgwide="1" frame="none" id="v4l2-dv-timings-cap"> + <title>struct <structname>v4l2_dv_timings_cap</structname></title> + <tgroup cols="4"> + &cs-str; + <tbody valign="top"> + <row> + <entry>__u32</entry> + <entry><structfield>type</structfield></entry> + <entry>Type of DV timings as listed in <xref linkend="dv-timing-types"/>.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>reserved</structfield>[3]</entry> + <entry>Reserved for future extensions. Drivers must set the array to zero.</entry> + </row> + <row> + <entry>union</entry> + <entry><structfield></structfield></entry> + <entry></entry> + </row> + <row> + <entry></entry> + <entry>&v4l2-bt-timings-cap;</entry> + <entry><structfield>bt</structfield></entry> + <entry>BT.656/1120 timings capabilities of the hardware.</entry> + </row> + <row> + <entry></entry> + <entry>__u32</entry> + <entry><structfield>raw_data</structfield>[32]</entry> + <entry></entry> + </row> + </tbody> + </tgroup> + </table> + + <table pgwide="1" frame="none" id="dv-bt-cap-capabilities"> + <title>DV BT Timing capabilities</title> + <tgroup cols="2"> + &cs-str; + <tbody valign="top"> + <row> + <entry>Flag</entry> + <entry>Description</entry> + </row> + <row> + <entry></entry> + <entry></entry> + </row> + <row> + <entry>V4L2_DV_BT_CAP_INTERLACED</entry> + <entry>Interlaced formats are supported. + </entry> + </row> + <row> + <entry>V4L2_DV_BT_CAP_PROGRESSIVE</entry> + <entry>Progressive formats are supported. + </entry> + </row> + <row> + <entry>V4L2_DV_BT_CAP_REDUCED_BLANKING</entry> + <entry>CVT/GTF specific: the timings can make use of reduced blanking (CVT) +or the 'Secondary GTF' curve (GTF). + </entry> + </row> + <row> + <entry>V4L2_DV_BT_CAP_CUSTOM</entry> + <entry>Can support non-standard timings, i.e. timings not belonging to the +standards set in the <structfield>standards</structfield> field. + </entry> + </row> + </tbody> + </tgroup> + </table> + </refsect1> + + <refsect1> + &return-value; + </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-dv-presets.xml b/Documentation/DocBook/media/v4l/vidioc-enum-dv-presets.xml index 0be17c232d3a..509f0012d2a6 100644 --- a/Documentation/DocBook/media/v4l/vidioc-enum-dv-presets.xml +++ b/Documentation/DocBook/media/v4l/vidioc-enum-dv-presets.xml @@ -48,6 +48,10 @@ <refsect1> <title>Description</title> + <para>This ioctl is <emphasis role="bold">deprecated</emphasis>. + New drivers and applications should use &VIDIOC-ENUM-DV-TIMINGS; instead. + </para> + <para>To query the attributes of a DV preset, applications initialize the <structfield>index</structfield> field and zero the reserved array of &v4l2-dv-enum-preset; and call the <constant>VIDIOC_ENUM_DV_PRESETS</constant> ioctl with a pointer to this diff --git a/Documentation/DocBook/media/v4l/vidioc-enum-dv-timings.xml b/Documentation/DocBook/media/v4l/vidioc-enum-dv-timings.xml new file mode 100644 index 000000000000..24c3bf4fd29a --- /dev/null +++ b/Documentation/DocBook/media/v4l/vidioc-enum-dv-timings.xml @@ -0,0 +1,119 @@ +<refentry id="vidioc-enum-dv-timings"> + <refmeta> + <refentrytitle>ioctl VIDIOC_ENUM_DV_TIMINGS</refentrytitle> + &manvol; + </refmeta> + + <refnamediv> + <refname>VIDIOC_ENUM_DV_TIMINGS</refname> + <refpurpose>Enumerate supported Digital Video timings</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_enum_dv_timings *<parameter>argp</parameter></paramdef> + </funcprototype> + </funcsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Arguments</title> + + <variablelist> + <varlistentry> + <term><parameter>fd</parameter></term> + <listitem> + <para>&fd;</para> + </listitem> + </varlistentry> + <varlistentry> + <term><parameter>request</parameter></term> + <listitem> + <para>VIDIOC_ENUM_DV_TIMINGS</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>While some DV receivers or transmitters support a wide range of timings, others +support only a limited number of timings. With this ioctl applications can enumerate a list +of known supported timings. Call &VIDIOC-DV-TIMINGS-CAP; to check if it also supports other +standards or even custom timings that are not in this list.</para> + + <para>To query the available timings, applications initialize the +<structfield>index</structfield> field and zero the reserved array of &v4l2-enum-dv-timings; +and call the <constant>VIDIOC_ENUM_DV_TIMINGS</constant> ioctl with a pointer to this +structure. Drivers fill the rest of the structure or return an +&EINVAL; when the index is out of bounds. To enumerate all supported DV timings, +applications shall begin at index zero, incrementing by one until the +driver returns <errorcode>EINVAL</errorcode>. Note that drivers may enumerate a +different set of DV timings after switching the video input or +output.</para> + + <table pgwide="1" frame="none" id="v4l2-enum-dv-timings"> + <title>struct <structname>v4l2_enum_dv_timings</structname></title> + <tgroup cols="3"> + &cs-str; + <tbody valign="top"> + <row> + <entry>__u32</entry> + <entry><structfield>index</structfield></entry> + <entry>Number of the DV timings, set by the +application.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>reserved</structfield>[3]</entry> + <entry>Reserved for future extensions. Drivers must set the array to zero.</entry> + </row> + <row> + <entry>&v4l2-dv-timings;</entry> + <entry><structfield>timings</structfield></entry> + <entry>The timings.</entry> + </row> + </tbody> + </tgroup> + </table> + </refsect1> + + <refsect1> + &return-value; + + <variablelist> + <varlistentry> + <term><errorcode>EINVAL</errorcode></term> + <listitem> + <para>The &v4l2-enum-dv-timings; <structfield>index</structfield> +is out of bounds.</para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> +</refentry> + +<!-- +Local Variables: +mode: sgml +sgml-parent-document: "v4l2.sgml" +indent-tabs-mode: nil +End: +--> diff --git a/Documentation/DocBook/media/v4l/vidioc-enum-fmt.xml b/Documentation/DocBook/media/v4l/vidioc-enum-fmt.xml index 347d142e7431..81ebe48317fe 100644 --- a/Documentation/DocBook/media/v4l/vidioc-enum-fmt.xml +++ b/Documentation/DocBook/media/v4l/vidioc-enum-fmt.xml @@ -71,7 +71,7 @@ the application. This is in no way related to the <structfield> pixelformat</structfield> field.</entry> </row> <row> - <entry>&v4l2-buf-type;</entry> + <entry>__u32</entry> <entry><structfield>type</structfield></entry> <entry>Type of the data stream, set by the application. Only these types are valid here: @@ -81,7 +81,7 @@ Only these types are valid here: <constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE</constant>, <constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant>, and custom (driver defined) types with code <constant>V4L2_BUF_TYPE_PRIVATE</constant> -and higher.</entry> +and higher. See <xref linkend="v4l2-buf-type" />.</entry> </row> <row> <entry>__u32</entry> diff --git a/Documentation/DocBook/media/v4l/vidioc-enuminput.xml b/Documentation/DocBook/media/v4l/vidioc-enuminput.xml index 9b8efcd6e947..46d5a044a537 100644 --- a/Documentation/DocBook/media/v4l/vidioc-enuminput.xml +++ b/Documentation/DocBook/media/v4l/vidioc-enuminput.xml @@ -285,7 +285,7 @@ input/output interface to linux-media@vger.kernel.org on 19 Oct 2009. <row> <entry><constant>V4L2_IN_CAP_CUSTOM_TIMINGS</constant></entry> <entry>0x00000002</entry> - <entry>This input supports setting custom video timings by using VIDIOC_S_DV_TIMINGS.</entry> + <entry>This input supports setting video timings by using VIDIOC_S_DV_TIMINGS.</entry> </row> <row> <entry><constant>V4L2_IN_CAP_STD</constant></entry> diff --git a/Documentation/DocBook/media/v4l/vidioc-enumoutput.xml b/Documentation/DocBook/media/v4l/vidioc-enumoutput.xml index a64d5ef103fa..428020000ef0 100644 --- a/Documentation/DocBook/media/v4l/vidioc-enumoutput.xml +++ b/Documentation/DocBook/media/v4l/vidioc-enumoutput.xml @@ -170,7 +170,7 @@ input/output interface to linux-media@vger.kernel.org on 19 Oct 2009. <row> <entry><constant>V4L2_OUT_CAP_CUSTOM_TIMINGS</constant></entry> <entry>0x00000002</entry> - <entry>This output supports setting custom video timings by using VIDIOC_S_DV_TIMINGS.</entry> + <entry>This output supports setting video timings by using VIDIOC_S_DV_TIMINGS.</entry> </row> <row> <entry><constant>V4L2_OUT_CAP_STD</constant></entry> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-crop.xml b/Documentation/DocBook/media/v4l/vidioc-g-crop.xml index 01a50640dce0..c4ff3b1887fb 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-crop.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-crop.xml @@ -100,14 +100,14 @@ changed and <constant>VIDIOC_S_CROP</constant> returns the &cs-str; <tbody valign="top"> <row> - <entry>&v4l2-buf-type;</entry> + <entry>__u32</entry> <entry><structfield>type</structfield></entry> <entry>Type of the data stream, set by the application. Only these types are valid here: <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant>, <constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant>, <constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant>, and custom (driver defined) types with code <constant>V4L2_BUF_TYPE_PRIVATE</constant> -and higher.</entry> +and higher. See <xref linkend="v4l2-buf-type" />.</entry> </row> <row> <entry>&v4l2-rect;</entry> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-dv-preset.xml b/Documentation/DocBook/media/v4l/vidioc-g-dv-preset.xml index 7940c1149393..61be9fa3803a 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-dv-preset.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-dv-preset.xml @@ -48,6 +48,12 @@ <refsect1> <title>Description</title> + + <para>These ioctls are <emphasis role="bold">deprecated</emphasis>. + New drivers and applications should use &VIDIOC-G-DV-TIMINGS; and &VIDIOC-S-DV-TIMINGS; + instead. + </para> + <para>To query and select the current DV preset, applications use the <constant>VIDIOC_G_DV_PRESET</constant> and <constant>VIDIOC_S_DV_PRESET</constant> ioctls which take a pointer to a &v4l2-dv-preset; type as argument. diff --git a/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml b/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml index 4a8648ae9a63..eda1a2991bbe 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml @@ -7,7 +7,7 @@ <refnamediv> <refname>VIDIOC_G_DV_TIMINGS</refname> <refname>VIDIOC_S_DV_TIMINGS</refname> - <refpurpose>Get or set custom DV timings for input or output</refpurpose> + <refpurpose>Get or set DV timings for input or output</refpurpose> </refnamediv> <refsynopsisdiv> @@ -48,12 +48,15 @@ <refsect1> <title>Description</title> - <para>To set custom DV timings for the input or output, applications use the -<constant>VIDIOC_S_DV_TIMINGS</constant> ioctl and to get the current custom timings, + <para>To set DV timings for the input or output, applications use the +<constant>VIDIOC_S_DV_TIMINGS</constant> ioctl and to get the current timings, applications use the <constant>VIDIOC_G_DV_TIMINGS</constant> ioctl. The detailed timing information is filled in using the structure &v4l2-dv-timings;. These ioctls take a pointer to the &v4l2-dv-timings; structure as argument. If the ioctl is not supported or the timing values are not correct, the driver returns &EINVAL;.</para> +<para>The <filename>linux/v4l2-dv-timings.h</filename> header can be used to get the +timings of the formats in the <xref linkend="cea861" /> and <xref linkend="vesadmt" /> +standards.</para> </refsect1> <refsect1> @@ -83,12 +86,13 @@ or the timing values are not correct, the driver returns &EINVAL;.</para> <row> <entry>__u32</entry> <entry><structfield>width</structfield></entry> - <entry>Width of the active video in pixels</entry> + <entry>Width of the active video in pixels.</entry> </row> <row> <entry>__u32</entry> <entry><structfield>height</structfield></entry> - <entry>Height of the active video in lines</entry> + <entry>Height of the active video frame in lines. So for interlaced formats the + height of the active video in each field is <structfield>height</structfield>/2.</entry> </row> <row> <entry>__u32</entry> @@ -125,32 +129,52 @@ bit 0 (V4L2_DV_VSYNC_POS_POL) is for vertical sync polarity and bit 1 (V4L2_DV_H <row> <entry>__u32</entry> <entry><structfield>vfrontporch</structfield></entry> - <entry>Vertical front porch in lines</entry> + <entry>Vertical front porch in lines. For interlaced formats this refers to the + odd field (aka field 1).</entry> </row> <row> <entry>__u32</entry> <entry><structfield>vsync</structfield></entry> - <entry>Vertical sync length in lines</entry> + <entry>Vertical sync length in lines. For interlaced formats this refers to the + odd field (aka field 1).</entry> </row> <row> <entry>__u32</entry> <entry><structfield>vbackporch</structfield></entry> - <entry>Vertical back porch in lines</entry> + <entry>Vertical back porch in lines. For interlaced formats this refers to the + odd field (aka field 1).</entry> </row> <row> <entry>__u32</entry> <entry><structfield>il_vfrontporch</structfield></entry> - <entry>Vertical front porch in lines for bottom field of interlaced field formats</entry> + <entry>Vertical front porch in lines for the even field (aka field 2) of + interlaced field formats.</entry> </row> <row> <entry>__u32</entry> <entry><structfield>il_vsync</structfield></entry> - <entry>Vertical sync length in lines for bottom field of interlaced field formats</entry> + <entry>Vertical sync length in lines for the even field (aka field 2) of + interlaced field formats.</entry> </row> <row> <entry>__u32</entry> <entry><structfield>il_vbackporch</structfield></entry> - <entry>Vertical back porch in lines for bottom field of interlaced field formats</entry> + <entry>Vertical back porch in lines for the even field (aka field 2) of + interlaced field formats.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>standards</structfield></entry> + <entry>The video standard(s) this format belongs to. This will be filled in by + the driver. Applications must set this to 0. See <xref linkend="dv-bt-standards"/> + for a list of standards.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>flags</structfield></entry> + <entry>Several flags giving more information about the format. + See <xref linkend="dv-bt-flags"/> for a description of the flags. + </entry> </row> </tbody> </tgroup> @@ -211,6 +235,90 @@ bit 0 (V4L2_DV_VSYNC_POS_POL) is for vertical sync polarity and bit 1 (V4L2_DV_H </tbody> </tgroup> </table> + <table pgwide="1" frame="none" id="dv-bt-standards"> + <title>DV BT Timing standards</title> + <tgroup cols="2"> + &cs-str; + <tbody valign="top"> + <row> + <entry>Timing standard</entry> + <entry>Description</entry> + </row> + <row> + <entry></entry> + <entry></entry> + </row> + <row> + <entry>V4L2_DV_BT_STD_CEA861</entry> + <entry>The timings follow the CEA-861 Digital TV Profile standard</entry> + </row> + <row> + <entry>V4L2_DV_BT_STD_DMT</entry> + <entry>The timings follow the VESA Discrete Monitor Timings standard</entry> + </row> + <row> + <entry>V4L2_DV_BT_STD_CVT</entry> + <entry>The timings follow the VESA Coordinated Video Timings standard</entry> + </row> + <row> + <entry>V4L2_DV_BT_STD_GTF</entry> + <entry>The timings follow the VESA Generalized Timings Formula standard</entry> + </row> + </tbody> + </tgroup> + </table> + <table pgwide="1" frame="none" id="dv-bt-flags"> + <title>DV BT Timing flags</title> + <tgroup cols="2"> + &cs-str; + <tbody valign="top"> + <row> + <entry>Flag</entry> + <entry>Description</entry> + </row> + <row> + <entry></entry> + <entry></entry> + </row> + <row> + <entry>V4L2_DV_FL_REDUCED_BLANKING</entry> + <entry>CVT/GTF specific: the timings use reduced blanking (CVT) or the 'Secondary +GTF' curve (GTF). In both cases the horizontal and/or vertical blanking +intervals are reduced, allowing a higher resolution over the same +bandwidth. This is a read-only flag, applications must not set this. + </entry> + </row> + <row> + <entry>V4L2_DV_FL_CAN_REDUCE_FPS</entry> + <entry>CEA-861 specific: set for CEA-861 formats with a framerate that is a multiple +of six. These formats can be optionally played at 1 / 1.001 speed to +be compatible with 60 Hz based standards such as NTSC and PAL-M that use a framerate of +29.97 frames per second. If the transmitter can't generate such frequencies, then the +flag will also be cleared. This is a read-only flag, applications must not set this. + </entry> + </row> + <row> + <entry>V4L2_DV_FL_REDUCED_FPS</entry> + <entry>CEA-861 specific: only valid for video transmitters, the flag is cleared +by receivers. It is also only valid for formats with the V4L2_DV_FL_CAN_REDUCE_FPS flag +set, for other formats the flag will be cleared by the driver. + +If the application sets this flag, then the pixelclock used to set up the transmitter is +divided by 1.001 to make it compatible with NTSC framerates. If the transmitter +can't generate such frequencies, then the flag will also be cleared. + </entry> + </row> + <row> + <entry>V4L2_DV_FL_HALF_LINE</entry> + <entry>Specific to interlaced formats: if set, then field 1 (aka the odd field) +is really one half-line longer and field 2 (aka the even field) is really one half-line +shorter, so each field has exactly the same number of half-lines. Whether half-lines can be +detected or used depends on the hardware. + </entry> + </row> + </tbody> + </tgroup> + </table> </refsect1> <refsect1> &return-value; diff --git a/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml b/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml index b17a7aac6997..e3d5afcdafbb 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml @@ -265,6 +265,32 @@ These controls are described in <xref These controls are described in <xref linkend="flash-controls" />.</entry> </row> + <row> + <entry><constant>V4L2_CTRL_CLASS_JPEG</constant></entry> + <entry>0x9d0000</entry> + <entry>The class containing JPEG compression controls. +These controls are described in <xref + linkend="jpeg-controls" />.</entry> + </row> + <row> + <entry><constant>V4L2_CTRL_CLASS_IMAGE_SOURCE</constant></entry> + <entry>0x9e0000</entry> <entry>The class containing image + source controls. These controls are described in <xref + linkend="image-source-controls" />.</entry> + </row> + <row> + <entry><constant>V4L2_CTRL_CLASS_IMAGE_PROC</constant></entry> + <entry>0x9f0000</entry> <entry>The class containing image + processing controls. These controls are described in <xref + linkend="image-process-controls" />.</entry> + </row> + <row> + <entry><constant>V4L2_CTRL_CLASS_JPEG</constant></entry> + <entry>0x9d0000</entry> + <entry>The class containing JPEG compression controls. +These controls are described in <xref + linkend="jpeg-controls" />.</entry> + </row> </tbody> </tgroup> </table> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-fmt.xml b/Documentation/DocBook/media/v4l/vidioc-g-fmt.xml index 17fbda15137b..52acff193a6f 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-fmt.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-fmt.xml @@ -116,7 +116,7 @@ this ioctl.</para> <colspec colname="c4" /> <tbody valign="top"> <row> - <entry>&v4l2-buf-type;</entry> + <entry>__u32</entry> <entry><structfield>type</structfield></entry> <entry></entry> <entry>Type of the data stream, see <xref diff --git a/Documentation/DocBook/media/v4l/vidioc-g-frequency.xml b/Documentation/DocBook/media/v4l/vidioc-g-frequency.xml index 66e9a5257861..69c178a4d205 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-frequency.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-frequency.xml @@ -95,14 +95,14 @@ the &v4l2-output; <structfield>modulator</structfield> field and the &v4l2-modulator; <structfield>index</structfield> field.</entry> </row> <row> - <entry>&v4l2-tuner-type;</entry> + <entry>__u32</entry> <entry><structfield>type</structfield></entry> <entry>The tuner type. This is the same value as in the -&v4l2-tuner; <structfield>type</structfield> field. The type must be set +&v4l2-tuner; <structfield>type</structfield> field. See The type must be set to <constant>V4L2_TUNER_RADIO</constant> for <filename>/dev/radioX</filename> device nodes, and to <constant>V4L2_TUNER_ANALOG_TV</constant> for all others. The field is not applicable to modulators, &ie; ignored -by drivers.</entry> +by drivers. See <xref linkend="v4l2-tuner-type" /></entry> </row> <row> <entry>__u32</entry> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-parm.xml b/Documentation/DocBook/media/v4l/vidioc-g-parm.xml index 19b1d85dd668..f83d2cdd1185 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-parm.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-parm.xml @@ -75,11 +75,12 @@ devices.</para> &cs-ustr; <tbody valign="top"> <row> - <entry>&v4l2-buf-type;</entry> + <entry>__u32</entry> <entry><structfield>type</structfield></entry> <entry></entry> <entry>The buffer (stream) type, same as &v4l2-format; -<structfield>type</structfield>, set by the application.</entry> +<structfield>type</structfield>, set by the application. See <xref + linkend="v4l2-buf-type" /></entry> </row> <row> <entry>union</entry> diff --git a/Documentation/DocBook/media/v4l/vidioc-g-sliced-vbi-cap.xml b/Documentation/DocBook/media/v4l/vidioc-g-sliced-vbi-cap.xml index 71741daaf725..bd015d1563ff 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-sliced-vbi-cap.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-sliced-vbi-cap.xml @@ -148,7 +148,7 @@ using the &VIDIOC-S-FMT; ioctl as described in <xref <structfield>service_lines</structfield>[1][0] to zero.</entry> </row> <row> - <entry>&v4l2-buf-type;</entry> + <entry>__u32</entry> <entry><structfield>type</structfield></entry> <entry>Type of the data stream, see <xref linkend="v4l2-buf-type" />. Should be diff --git a/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml b/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml index 91ec2fb658f8..62a1aa200a36 100644 --- a/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml +++ b/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml @@ -107,7 +107,7 @@ user.<!-- FIXME Video inputs already have a name, the purpose of this field is not quite clear.--></para></entry> </row> <row> - <entry>&v4l2-tuner-type;</entry> + <entry>__u32</entry> <entry><structfield>type</structfield></entry> <entry spanname="hspan">Type of the tuner, see <xref linkend="v4l2-tuner-type" />.</entry> diff --git a/Documentation/DocBook/media/v4l/vidioc-prepare-buf.xml b/Documentation/DocBook/media/v4l/vidioc-prepare-buf.xml index 7bde698760e4..fa7ad7e33228 100644 --- a/Documentation/DocBook/media/v4l/vidioc-prepare-buf.xml +++ b/Documentation/DocBook/media/v4l/vidioc-prepare-buf.xml @@ -48,6 +48,12 @@ <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>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 diff --git a/Documentation/DocBook/media/v4l/vidioc-query-dv-preset.xml b/Documentation/DocBook/media/v4l/vidioc-query-dv-preset.xml index 23b17f604211..1bc8aeb3ff1f 100644 --- a/Documentation/DocBook/media/v4l/vidioc-query-dv-preset.xml +++ b/Documentation/DocBook/media/v4l/vidioc-query-dv-preset.xml @@ -49,6 +49,10 @@ input</refpurpose> <refsect1> <title>Description</title> + <para>This ioctl is <emphasis role="bold">deprecated</emphasis>. + New drivers and applications should use &VIDIOC-QUERY-DV-TIMINGS; instead. + </para> + <para>The hardware may be able to detect the current DV preset automatically, similar to sensing the video standard. To do so, applications call <constant> VIDIOC_QUERY_DV_PRESET</constant> with a pointer to a diff --git a/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml b/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml new file mode 100644 index 000000000000..44935a0ffcf0 --- /dev/null +++ b/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml @@ -0,0 +1,104 @@ +<refentry id="vidioc-query-dv-timings"> + <refmeta> + <refentrytitle>ioctl VIDIOC_QUERY_DV_TIMINGS</refentrytitle> + &manvol; + </refmeta> + + <refnamediv> + <refname>VIDIOC_QUERY_DV_TIMINGS</refname> + <refpurpose>Sense the DV preset received by the current +input</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <funcsynopsis> + <funcprototype> + <funcdef>int <function>ioctl</function></funcdef> + <paramdef>int <parameter>fd</parameter></paramdef> + <paramdef>int <parameter>request</parameter></paramdef> + <paramdef>struct v4l2_dv_timings *<parameter>argp</parameter></paramdef> + </funcprototype> + </funcsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Arguments</title> + + <variablelist> + <varlistentry> + <term><parameter>fd</parameter></term> + <listitem> + <para>&fd;</para> + </listitem> + </varlistentry> + <varlistentry> + <term><parameter>request</parameter></term> + <listitem> + <para>VIDIOC_QUERY_DV_TIMINGS</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 hardware may be able to detect the current DV timings +automatically, similar to sensing the video standard. To do so, applications +call <constant>VIDIOC_QUERY_DV_TIMINGS</constant> with a pointer to a +&v4l2-dv-timings;. Once the hardware detects the timings, it will fill in the +timings structure. + +If the timings could not be detected because there was no signal, then +<errorcode>ENOLINK</errorcode> is returned. If a signal was detected, but +it was unstable and the receiver could not lock to the signal, then +<errorcode>ENOLCK</errorcode> is returned. If the receiver could lock to the signal, +but the format is unsupported (e.g. because the pixelclock is out of range +of the hardware capabilities), then the driver fills in whatever timings it +could find and returns <errorcode>ERANGE</errorcode>. In that case the application +can call &VIDIOC-DV-TIMINGS-CAP; to compare the found timings with the hardware's +capabilities in order to give more precise feedback to the user. +</para> + </refsect1> + + <refsect1> + &return-value; + + <variablelist> + <varlistentry> + <term><errorcode>ENOLINK</errorcode></term> + <listitem> + <para>No timings could be detected because no signal was found. +</para> + </listitem> + </varlistentry> + <varlistentry> + <term><errorcode>ENOLCK</errorcode></term> + <listitem> + <para>The signal was unstable and the hardware could not lock on to it. +</para> + </listitem> + </varlistentry> + <varlistentry> + <term><errorcode>ERANGE</errorcode></term> + <listitem> + <para>Timings were found, but they are out of range of the hardware +capabilities. +</para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> +</refentry> diff --git a/Documentation/DocBook/media/v4l/vidioc-queryctrl.xml b/Documentation/DocBook/media/v4l/vidioc-queryctrl.xml index 36660d311b51..e6645b996558 100644 --- a/Documentation/DocBook/media/v4l/vidioc-queryctrl.xml +++ b/Documentation/DocBook/media/v4l/vidioc-queryctrl.xml @@ -127,7 +127,7 @@ the first control with a higher ID. Drivers which do not support this flag yet always return an &EINVAL;.</entry> </row> <row> - <entry>&v4l2-ctrl-type;</entry> + <entry>__u32</entry> <entry><structfield>type</structfield></entry> <entry>Type of control, see <xref linkend="v4l2-ctrl-type" />.</entry> @@ -215,11 +215,12 @@ the array to zero.</entry> <table pgwide="1" frame="none" id="v4l2-querymenu"> <title>struct <structname>v4l2_querymenu</structname></title> - <tgroup cols="3"> + <tgroup cols="4"> &cs-str; <tbody valign="top"> <row> <entry>__u32</entry> + <entry></entry> <entry><structfield>id</structfield></entry> <entry>Identifies the control, set by the application from the respective &v4l2-queryctrl; @@ -227,18 +228,38 @@ from the respective &v4l2-queryctrl; </row> <row> <entry>__u32</entry> + <entry></entry> <entry><structfield>index</structfield></entry> <entry>Index of the menu item, starting at zero, set by the application.</entry> </row> <row> + <entry>union</entry> + <entry></entry> + <entry></entry> + <entry></entry> + </row> + <row> + <entry></entry> <entry>__u8</entry> <entry><structfield>name</structfield>[32]</entry> <entry>Name of the menu item, a NUL-terminated ASCII -string. This information is intended for the user.</entry> +string. This information is intended for the user. This field is valid +for <constant>V4L2_CTRL_FLAG_MENU</constant> type controls.</entry> + </row> + <row> + <entry></entry> + <entry>__s64</entry> + <entry><structfield>value</structfield></entry> + <entry> + Value of the integer menu item. This field is valid for + <constant>V4L2_CTRL_FLAG_INTEGER_MENU</constant> type + controls. + </entry> </row> <row> <entry>__u32</entry> + <entry></entry> <entry><structfield>reserved</structfield></entry> <entry>Reserved for future extensions. Drivers must set the array to zero.</entry> @@ -292,6 +313,20 @@ the menu items can be enumerated with the <constant>VIDIOC_QUERYMENU</constant> ioctl.</entry> </row> <row> + <entry><constant>V4L2_CTRL_TYPE_INTEGER_MENU</constant></entry> + <entry>≥ 0</entry> + <entry>1</entry> + <entry>N-1</entry> + <entry> + The control has a menu of N choices. The values of the + menu items can be enumerated with the + <constant>VIDIOC_QUERYMENU</constant> ioctl. This is + similar to <constant>V4L2_CTRL_TYPE_MENU</constant> + except that instead of strings, the menu items are + signed 64-bit integers. + </entry> + </row> + <row> <entry><constant>V4L2_CTRL_TYPE_BITMASK</constant></entry> <entry>0</entry> <entry>n/a</entry> diff --git a/Documentation/DocBook/media/v4l/vidioc-reqbufs.xml b/Documentation/DocBook/media/v4l/vidioc-reqbufs.xml index 7be4b1d29b90..d7c95057bc51 100644 --- a/Documentation/DocBook/media/v4l/vidioc-reqbufs.xml +++ b/Documentation/DocBook/media/v4l/vidioc-reqbufs.xml @@ -92,18 +92,19 @@ streamoff.--></para> <entry>The number of buffers requested or granted.</entry> </row> <row> - <entry>&v4l2-buf-type;</entry> + <entry>__u32</entry> <entry><structfield>type</structfield></entry> <entry>Type of the stream or buffers, this is the same as the &v4l2-format; <structfield>type</structfield> field. See <xref linkend="v4l2-buf-type" /> for valid values.</entry> </row> <row> - <entry>&v4l2-memory;</entry> + <entry>__u32</entry> <entry><structfield>memory</structfield></entry> <entry>Applications set this field to <constant>V4L2_MEMORY_MMAP</constant> or -<constant>V4L2_MEMORY_USERPTR</constant>.</entry> +<constant>V4L2_MEMORY_USERPTR</constant>. See <xref linkend="v4l2-memory" +/>.</entry> </row> <row> <entry>__u32</entry> 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 18b1a8266f7c..407dfceb71f0 100644 --- a/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml +++ b/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml @@ -73,10 +73,11 @@ same value as in the &v4l2-input; <structfield>tuner</structfield> field and the &v4l2-tuner; <structfield>index</structfield> field.</entry> </row> <row> - <entry>&v4l2-tuner-type;</entry> + <entry>__u32</entry> <entry><structfield>type</structfield></entry> <entry>The tuner type. This is the same value as in the -&v4l2-tuner; <structfield>type</structfield> field.</entry> +&v4l2-tuner; <structfield>type</structfield> field. See <xref + linkend="v4l2-tuner-type" /></entry> </row> <row> <entry>__u32</entry> diff --git a/Documentation/DocBook/media/v4l/vidioc-subdev-g-crop.xml b/Documentation/DocBook/media/v4l/vidioc-subdev-g-crop.xml index 06197323a8cc..4cddd788c589 100644 --- a/Documentation/DocBook/media/v4l/vidioc-subdev-g-crop.xml +++ b/Documentation/DocBook/media/v4l/vidioc-subdev-g-crop.xml @@ -58,9 +58,12 @@ <title>Description</title> <note> - <title>Experimental</title> - <para>This is an <link linkend="experimental">experimental</link> - interface and may change in the future.</para> + <title>Obsolete</title> + + <para>This is an <link linkend="obsolete">obsolete</link> + interface and may be removed in the future. It is superseded by + <link linkend="vidioc-subdev-g-selection">the selection + API</link>.</para> </note> <para>To retrieve the current crop rectangle applications set the diff --git a/Documentation/DocBook/media/v4l/vidioc-subdev-g-selection.xml b/Documentation/DocBook/media/v4l/vidioc-subdev-g-selection.xml new file mode 100644 index 000000000000..208e9f0da3f3 --- /dev/null +++ b/Documentation/DocBook/media/v4l/vidioc-subdev-g-selection.xml @@ -0,0 +1,228 @@ +<refentry id="vidioc-subdev-g-selection"> + <refmeta> + <refentrytitle>ioctl VIDIOC_SUBDEV_G_SELECTION, VIDIOC_SUBDEV_S_SELECTION</refentrytitle> + &manvol; + </refmeta> + + <refnamediv> + <refname>VIDIOC_SUBDEV_G_SELECTION</refname> + <refname>VIDIOC_SUBDEV_S_SELECTION</refname> + <refpurpose>Get or set selection rectangles on a subdev pad</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_subdev_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_SUBDEV_G_SELECTION, VIDIOC_SUBDEV_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 selections are used to configure various image + processing functionality performed by the subdevs which affect the + image size. This currently includes cropping, scaling and + composition.</para> + + <para>The selection API replaces <link + linkend="vidioc-subdev-g-crop">the old subdev crop API</link>. All + the function of the crop API, and more, are supported by the + selections API.</para> + + <para>See <xref linkend="subdev"></xref> for + more information on how each selection target affects the image + processing pipeline inside the subdevice.</para> + + <section> + <title>Types of selection targets</title> + + <para>There are two types of selection targets: actual and bounds. + The ACTUAL targets are the targets which configure the hardware. + The BOUNDS target will return a rectangle that contain all + possible ACTUAL rectangles.</para> + </section> + + <section> + <title>Discovering supported features</title> + + <para>To discover which targets are supported, the user can + perform <constant>VIDIOC_SUBDEV_G_SELECTION</constant> on them. + Any unsupported target will return + <constant>EINVAL</constant>.</para> + </section> + + <table pgwide="1" frame="none" id="v4l2-subdev-selection-targets"> + <title>V4L2 subdev selection targets</title> + <tgroup cols="3"> + &cs-def; + <tbody valign="top"> + <row> + <entry><constant>V4L2_SUBDEV_SEL_TGT_CROP_ACTUAL</constant></entry> + <entry>0x0000</entry> + <entry>Actual crop. Defines the cropping + performed by the processing step.</entry> + </row> + <row> + <entry><constant>V4L2_SUBDEV_SEL_TGT_CROP_BOUNDS</constant></entry> + <entry>0x0002</entry> + <entry>Bounds of the crop rectangle.</entry> + </row> + <row> + <entry><constant>V4L2_SUBDEV_SEL_TGT_COMPOSE_ACTUAL</constant></entry> + <entry>0x0100</entry> + <entry>Actual compose rectangle. Used to configure scaling + on sink pads and composition on source pads.</entry> + </row> + <row> + <entry><constant>V4L2_SUBDEV_SEL_TGT_COMPOSE_BOUNDS</constant></entry> + <entry>0x0102</entry> + <entry>Bounds of the compose rectangle.</entry> + </row> + </tbody> + </tgroup> + </table> + + <table pgwide="1" frame="none" id="v4l2-subdev-selection-flags"> + <title>V4L2 subdev selection flags</title> + <tgroup cols="3"> + &cs-def; + <tbody valign="top"> + <row> + <entry><constant>V4L2_SUBDEV_SEL_FLAG_SIZE_GE</constant></entry> + <entry>(1 << 0)</entry> <entry>Suggest the driver it + should choose greater or equal rectangle (in size) than + was requested. Albeit the driver may choose a lesser size, + it will only do so due to hardware limitations. Without + this flag (and + <constant>V4L2_SUBDEV_SEL_FLAG_SIZE_LE</constant>) the + behaviour is to choose the closest possible + rectangle.</entry> + </row> + <row> + <entry><constant>V4L2_SUBDEV_SEL_FLAG_SIZE_LE</constant></entry> + <entry>(1 << 1)</entry> <entry>Suggest the driver it + should choose lesser or equal rectangle (in size) than was + requested. Albeit the driver may choose a greater size, it + will only do so due to hardware limitations.</entry> + </row> + <row> + <entry><constant>V4L2_SUBDEV_SEL_FLAG_KEEP_CONFIG</constant></entry> + <entry>(1 << 2)</entry> + <entry>The configuration should not be propagated to any + further processing steps. If this flag is not given, the + configuration is propagated inside the subdevice to all + further processing steps.</entry> + </row> + </tbody> + </tgroup> + </table> + + <table pgwide="1" frame="none" id="v4l2-subdev-selection"> + <title>struct <structname>v4l2_subdev_selection</structname></title> + <tgroup cols="3"> + &cs-str; + <tbody valign="top"> + <row> + <entry>__u32</entry> + <entry><structfield>which</structfield></entry> + <entry>Active or try selection, from + &v4l2-subdev-format-whence;.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>pad</structfield></entry> + <entry>Pad number as reported by the media framework.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>target</structfield></entry> + <entry>Target selection rectangle. See + <xref linkend="v4l2-subdev-selection-targets">.</xref>.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>flags</structfield></entry> + <entry>Flags. See + <xref linkend="v4l2-subdev-selection-flags">.</xref></entry> + </row> + <row> + <entry>&v4l2-rect;</entry> + <entry><structfield>rect</structfield></entry> + <entry>Selection rectangle, in pixels.</entry> + </row> + <row> + <entry>__u32</entry> + <entry><structfield>reserved</structfield>[8]</entry> + <entry>Reserved for future extensions. Applications and drivers must + set the array to zero.</entry> + </row> + </tbody> + </tgroup> + </table> + + </refsect1> + + <refsect1> + &return-value; + + <variablelist> + <varlistentry> + <term><errorcode>EBUSY</errorcode></term> + <listitem> + <para>The selection rectangle can't be changed because the + pad is currently busy. This can be caused, for instance, by + an active video stream on the pad. The ioctl must not be + retried without performing another action to fix the problem + first. Only returned by + <constant>VIDIOC_SUBDEV_S_SELECTION</constant></para> + </listitem> + </varlistentry> + <varlistentry> + <term><errorcode>EINVAL</errorcode></term> + <listitem> + <para>The &v4l2-subdev-selection; + <structfield>pad</structfield> references a non-existing + pad, the <structfield>which</structfield> field references a + non-existing format, or the selection target is not + supported on the given subdev pad.</para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> +</refentry> |
