Synopsis
========
-.. c:function:: int ioctl( int fd, int request, struct v4l2_output *argp )
+.. c:function:: int ioctl( int fd, VIDIOC_ENUMOUTPUT, struct v4l2_output *argp )
+ :name: VIDIOC_ENUMOUTPUT
Arguments
``fd``
File descriptor returned by :ref:`open() <func-open>`.
-``request``
- VIDIOC_ENUMOUTPUT
-
``argp``
===========
To query the attributes of a video outputs applications initialize the
-``index`` field of struct :ref:`v4l2_output <v4l2-output>` and call
+``index`` field of struct :c:type:`v4l2_output` and call
the :ref:`VIDIOC_ENUMOUTPUT` ioctl with a pointer to this structure.
Drivers fill the rest of the structure or return an ``EINVAL`` error code
when the index is out of bounds. To enumerate all outputs applications
.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}|
-.. _v4l2-output:
+.. c:type:: v4l2_output
.. flat-table:: struct v4l2_output
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
-
- - .. row 1
-
- - __u32
-
- - ``index``
-
- - Identifies the output, set by the application.
-
- - .. row 2
-
- - __u8
-
- - ``name``\ [32]
-
- - Name of the video output, a NUL-terminated ASCII string, for
- example: "Vout". This information is intended for the user,
- preferably the connector label on the device itself.
-
- - .. row 3
-
- - __u32
-
- - ``type``
-
- - Type of the output, see :ref:`output-type`.
-
- - .. row 4
-
- - __u32
-
- - ``audioset``
-
- - Drivers can enumerate up to 32 video and audio outputs. This field
- shows which audio outputs were selectable as the current output if
- this was the currently selected video output. It is a bit mask.
- The LSB corresponds to audio output 0, the MSB to output 31. Any
- number of bits can be set, or none.
-
- When the driver does not enumerate audio outputs no bits must be
- set. Applications shall not interpret this as lack of audio
- support. Drivers may automatically select audio outputs without
- enumerating them.
-
- For details on audio outputs and how to select the current output
- see :ref:`audio`.
-
- - .. row 5
-
- - __u32
-
- - ``modulator``
-
- - Output devices can have zero or more RF modulators. When the
- ``type`` is ``V4L2_OUTPUT_TYPE_MODULATOR`` this is an RF connector
- and this field identifies the modulator. It corresponds to struct
- :ref:`v4l2_modulator <v4l2-modulator>` field ``index``. For
- details on modulators see :ref:`tuner`.
-
- - .. row 6
-
- - :ref:`v4l2_std_id <v4l2-std-id>`
-
- - ``std``
-
- - Every video output supports one or more different video standards.
- This field is a set of all supported standards. For details on
- video standards and how to switch see :ref:`standard`.
-
- - .. row 7
-
- - __u32
-
- - ``capabilities``
-
- - This field provides capabilities for the output. See
- :ref:`output-capabilities` for flags.
-
- - .. row 8
-
- - __u32
-
- - ``reserved``\ [3]
-
- - Reserved for future extensions. Drivers must set the array to
- zero.
+ * - __u32
+ - ``index``
+ - Identifies the output, set by the application.
+ * - __u8
+ - ``name``\ [32]
+ - Name of the video output, a NUL-terminated ASCII string, for
+ example: "Vout". This information is intended for the user,
+ preferably the connector label on the device itself.
+ * - __u32
+ - ``type``
+ - Type of the output, see :ref:`output-type`.
+ * - __u32
+ - ``audioset``
+ - Drivers can enumerate up to 32 video and audio outputs. This field
+ shows which audio outputs were selectable as the current output if
+ this was the currently selected video output. It is a bit mask.
+ The LSB corresponds to audio output 0, the MSB to output 31. Any
+ number of bits can be set, or none.
+
+ When the driver does not enumerate audio outputs no bits must be
+ set. Applications shall not interpret this as lack of audio
+ support. Drivers may automatically select audio outputs without
+ enumerating them.
+
+ For details on audio outputs and how to select the current output
+ see :ref:`audio`.
+ * - __u32
+ - ``modulator``
+ - Output devices can have zero or more RF modulators. When the
+ ``type`` is ``V4L2_OUTPUT_TYPE_MODULATOR`` this is an RF connector
+ and this field identifies the modulator. It corresponds to struct
+ :c:type:`v4l2_modulator` field ``index``. For
+ details on modulators see :ref:`tuner`.
+ * - :ref:`v4l2_std_id <v4l2-std-id>`
+ - ``std``
+ - Every video output supports one or more different video standards.
+ This field is a set of all supported standards. For details on
+ video standards and how to switch see :ref:`standard`.
+ * - __u32
+ - ``capabilities``
+ - This field provides capabilities for the output. See
+ :ref:`output-capabilities` for flags.
+ * - __u32
+ - ``reserved``\ [3]
+ - Reserved for future extensions. Drivers must set the array to
+ zero.
:stub-columns: 0
:widths: 3 1 4
-
- - .. row 1
-
- - ``V4L2_OUTPUT_TYPE_MODULATOR``
-
- - 1
-
- - This output is an analog TV modulator.
-
- - .. row 2
-
- - ``V4L2_OUTPUT_TYPE_ANALOG``
-
- - 2
-
- - Analog baseband output, for example Composite / CVBS, S-Video,
- RGB.
-
- - .. row 3
-
- - ``V4L2_OUTPUT_TYPE_ANALOGVGAOVERLAY``
-
- - 3
-
- - [?]
+ * - ``V4L2_OUTPUT_TYPE_MODULATOR``
+ - 1
+ - This output is an analog TV modulator.
+ * - ``V4L2_OUTPUT_TYPE_ANALOG``
+ - 2
+ - Analog baseband output, for example Composite / CVBS, S-Video,
+ RGB.
+ * - ``V4L2_OUTPUT_TYPE_ANALOGVGAOVERLAY``
+ - 3
+ - [?]
:stub-columns: 0
:widths: 3 1 4
-
- - .. row 1
-
- - ``V4L2_OUT_CAP_DV_TIMINGS``
-
- - 0x00000002
-
- - This output supports setting video timings by using
- VIDIOC_S_DV_TIMINGS.
-
- - .. row 2
-
- - ``V4L2_OUT_CAP_STD``
-
- - 0x00000004
-
- - This output supports setting the TV standard by using
- VIDIOC_S_STD.
-
- - .. row 3
-
- - ``V4L2_OUT_CAP_NATIVE_SIZE``
-
- - 0x00000008
-
- - This output supports setting the native size using the
- ``V4L2_SEL_TGT_NATIVE_SIZE`` selection target, see
- :ref:`v4l2-selections-common`.
+ * - ``V4L2_OUT_CAP_DV_TIMINGS``
+ - 0x00000002
+ - This output supports setting video timings by using
+ VIDIOC_S_DV_TIMINGS.
+ * - ``V4L2_OUT_CAP_STD``
+ - 0x00000004
+ - This output supports setting the TV standard by using
+ VIDIOC_S_STD.
+ * - ``V4L2_OUT_CAP_NATIVE_SIZE``
+ - 0x00000008
+ - This output supports setting the native size using the
+ ``V4L2_SEL_TGT_NATIVE_SIZE`` selection target, see
+ :ref:`v4l2-selections-common`.
Return Value
:ref:`Generic Error Codes <gen-errors>` chapter.
EINVAL
- The struct :ref:`v4l2_output <v4l2-output>` ``index`` is out of
+ The struct :c:type:`v4l2_output` ``index`` is out of
bounds.
projects / cascardo / linux.git / blobdiff