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Commit 586027ce authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab
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doc-rst: linux_tv: reformat all syscall pages 

The syscall pages are written to be used also as man-pages.

However, they don't match the format used by kernel-doc
generated pages from DocBook. Rewrite them to match it.

One side effect is that now all such pages at the book
will have the same format, reducing the format differences
between DVB and the other parts of the book.
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent 47d23e36
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Showing with 2261 additions and 1904 deletions
Documentation/linux_tv/media/dvb/FE_DISHNETWORK_SEND_LEGACY_CMD.rst
View file @ 586027ce
......@@ -6,27 +6,19 @@
FE_DISHNETWORK_SEND_LEGACY_CMD
******************************
Description
-----------
NAME
====
WARNING: This is a very obscure legacy command, used only at stv0299
driver. Should not be used on newer drivers.
It provides a non-standard method for selecting Diseqc voltage on the
frontend, for Dish Network legacy switches.
As support for this ioctl were added in 2004, this means that such
dishes were already legacy in 2004.
FE_DISHNETWORK_SEND_LEGACY_CMD
Synopsis
--------
SYNOPSIS
========
.. c:function:: int ioctl(int fd, int request = FE_DISHNETWORK_SEND_LEGACY_CMD, unsigned long cmd)
Arguments
----------
ARGUMENTS
=========
.. flat-table::
:header-rows: 0
......@@ -40,8 +32,21 @@ Arguments
- sends the specified raw cmd to the dish via DISEqC.
Return Value
------------
DESCRIPTION
===========
WARNING: This is a very obscure legacy command, used only at stv0299
driver. Should not be used on newer drivers.
It provides a non-standard method for selecting Diseqc voltage on the
frontend, for Dish Network legacy switches.
As support for this ioctl were added in 2004, this means that such
dishes were already legacy in 2004.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/FE_GET_EVENT.rst
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......@@ -6,24 +6,19 @@
FE_GET_EVENT
************
Description
-----------
NAME
====
This ioctl call returns a frontend event if available. If an event is
not available, the behavior depends on whether the device is in blocking
or non-blocking mode. In the latter case, the call fails immediately
with errno set to ``EWOULDBLOCK``. In the former case, the call blocks until
an event becomes available.
FE_GET_EVENT
Synopsis
--------
SYNOPSIS
========
.. c:function:: int ioctl(int fd, int request = QPSK_GET_EVENT, struct dvb_frontend_event *ev)
Arguments
----------
ARGUMENTS
=========
.. flat-table::
:header-rows: 0
......@@ -54,8 +49,18 @@ Arguments
- if any, is to be stored.
Return Value
------------
DESCRIPTION
===========
This ioctl call returns a frontend event if available. If an event is
not available, the behavior depends on whether the device is in blocking
or non-blocking mode. In the latter case, the call fails immediately
with errno set to ``EWOULDBLOCK``. In the former case, the call blocks until
an event becomes available.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/FE_GET_FRONTEND.rst
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......@@ -6,21 +6,19 @@
FE_GET_FRONTEND
***************
Description
-----------
NAME
====
This ioctl call queries the currently effective frontend parameters. For
this command, read-only access to the device is sufficient.
FE_GET_FRONTEND
Synopsis
--------
SYNOPSIS
========
.. c:function:: int ioctl(int fd, int request = FE_GET_FRONTEND, struct dvb_frontend_parameters *p)
Arguments
----------
ARGUMENTS
=========
.. flat-table::
:header-rows: 0
......@@ -47,8 +45,15 @@ Arguments
- Points to parameters for tuning operation.
Return Value
------------
DESCRIPTION
===========
This ioctl call queries the currently effective frontend parameters. For
this command, read-only access to the device is sufficient.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/FE_READ_SIGNAL_STRENGTH.rst
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......@@ -6,22 +6,19 @@
FE_READ_SIGNAL_STRENGTH
***********************
Description
-----------
NAME
====
This ioctl call returns the signal strength value for the signal
currently received by the front-end. For this command, read-only access
to the device is sufficient.
FE_READ_SIGNAL_STRENGTH
Synopsis
--------
SYNOPSIS
========
.. c:function:: int ioctl( int fd, int request = FE_READ_SIGNAL_STRENGTH, uint16_t *strength)
Arguments
----------
ARGUMENTS
=========
.. flat-table::
:header-rows: 0
......@@ -49,8 +46,16 @@ Arguments
- The signal strength value is stored into \*strength.
Return Value
------------
DESCRIPTION
===========
This ioctl call returns the signal strength value for the signal
currently received by the front-end. For this command, read-only access
to the device is sufficient.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/FE_READ_SNR.rst
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......@@ -6,22 +6,19 @@
FE_READ_SNR
***********
Description
-----------
NAME
====
This ioctl call returns the signal-to-noise ratio for the signal
currently received by the front-end. For this command, read-only access
to the device is sufficient.
FE_READ_SNR
Synopsis
--------
SYNOPSIS
========
.. c:function:: int ioctl(int fd, int request = FE_READ_SNR, int16_t *snr)
Arguments
----------
ARGUMENTS
=========
.. flat-table::
:header-rows: 0
......@@ -47,8 +44,16 @@ Arguments
- The signal-to-noise ratio is stored into \*snr.
Return Value
------------
DESCRIPTION
===========
This ioctl call returns the signal-to-noise ratio for the signal
currently received by the front-end. For this command, read-only access
to the device is sufficient.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/FE_READ_UNCORRECTED_BLOCKS.rst
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......@@ -6,24 +6,19 @@
FE_READ_UNCORRECTED_BLOCKS
**************************
Description
-----------
NAME
====
This ioctl call returns the number of uncorrected blocks detected by the
device driver during its lifetime. For meaningful measurements, the
increment in block count during a specific time interval should be
calculated. For this command, read-only access to the device is
sufficient.
FE_READ_UNCORRECTED_BLOCKS
Synopsis
--------
SYNOPSIS
========
.. c:function:: int ioctl( int fd, int request =FE_READ_UNCORRECTED_BLOCKS, uint32_t *ublocks)
Arguments
----------
ARGUMENTS
=========
.. flat-table::
:header-rows: 0
......@@ -51,8 +46,18 @@ Arguments
- The total number of uncorrected blocks seen by the driver so far.
Return Value
------------
DESCRIPTION
===========
This ioctl call returns the number of uncorrected blocks detected by the
device driver during its lifetime. For meaningful measurements, the
increment in block count during a specific time interval should be
calculated. For this command, read-only access to the device is
sufficient.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/FE_SET_FRONTEND.rst
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......@@ -6,28 +6,19 @@
FE_SET_FRONTEND
***************
Description
-----------
NAME
====
This ioctl call starts a tuning operation using specified parameters.
The result of this call will be successful if the parameters were valid
and the tuning could be initiated. The result of the tuning operation in
itself, however, will arrive asynchronously as an event (see
documentation for :ref:`FE_GET_EVENT` and
FrontendEvent.) If a new :ref:`FE_SET_FRONTEND`
operation is initiated before the previous one was completed, the
previous operation will be aborted in favor of the new one. This command
requires read/write access to the device.
FE_SET_FRONTEND
Synopsis
--------
SYNOPSIS
========
.. c:function:: int ioctl(int fd, int request = FE_SET_FRONTEND, struct dvb_frontend_parameters *p)
Arguments
----------
ARGUMENTS
=========
.. flat-table::
:header-rows: 0
......@@ -54,8 +45,22 @@ Arguments
- Points to parameters for tuning operation.
Return Value
------------
DESCRIPTION
===========
This ioctl call starts a tuning operation using specified parameters.
The result of this call will be successful if the parameters were valid
and the tuning could be initiated. The result of the tuning operation in
itself, however, will arrive asynchronously as an event (see
documentation for :ref:`FE_GET_EVENT` and
FrontendEvent.) If a new :ref:`FE_SET_FRONTEND`
operation is initiated before the previous one was completed, the
previous operation will be aborted in favor of the new one. This command
requires read/write access to the device.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/audio-bilingual-channel-select.rst
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......@@ -2,28 +2,23 @@
.. _AUDIO_BILINGUAL_CHANNEL_SELECT:
==============================
AUDIO_BILINGUAL_CHANNEL_SELECT
==============================
Description
-----------
This ioctl is obsolete. Do not use in new drivers. It has been replaced
by the V4L2 ``V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK`` control
for MPEG decoders controlled through V4L2.
NAME
----
This ioctl call asks the Audio Device to select the requested channel
for bilingual streams if possible.
AUDIO_BILINGUAL_CHANNEL_SELECT
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = AUDIO_BILINGUAL_CHANNEL_SELECT, audio_channel_select_t)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -49,11 +44,20 @@ Arguments
- Select the output format of the audio (mono left/right, stereo).
Return Value
DESCRIPTION
-----------
This ioctl is obsolete. Do not use in new drivers. It has been replaced
by the V4L2 ``V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK`` control
for MPEG decoders controlled through V4L2.
This ioctl call asks the Audio Device to select the requested channel
for bilingual streams if possible.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/audio-channel-select.rst
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......@@ -2,27 +2,23 @@
.. _AUDIO_CHANNEL_SELECT:
====================
AUDIO_CHANNEL_SELECT
====================
Description
-----------
This ioctl is for DVB devices only. To control a V4L2 decoder use the
V4L2 ``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK`` control instead.
NAME
----
This ioctl call asks the Audio Device to select the requested channel if
possible.
AUDIO_CHANNEL_SELECT
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = AUDIO_CHANNEL_SELECT, audio_channel_select_t)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -48,11 +44,19 @@ Arguments
- Select the output format of the audio (mono left/right, stereo).
Return Value
DESCRIPTION
-----------
This ioctl is for DVB devices only. To control a V4L2 decoder use the
V4L2 ``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK`` control instead.
This ioctl call asks the Audio Device to select the requested channel if
possible.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/audio-clear-buffer.rst
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......@@ -2,24 +2,23 @@
.. _AUDIO_CLEAR_BUFFER:
==================
AUDIO_CLEAR_BUFFER
==================
Description
-----------
NAME
----
This ioctl call asks the Audio Device to clear all software and hardware
buffers of the audio decoder device.
AUDIO_CLEAR_BUFFER
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = AUDIO_CLEAR_BUFFER)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -39,11 +38,16 @@ Arguments
- Equals AUDIO_CLEAR_BUFFER for this command.
Return Value
DESCRIPTION
-----------
This ioctl call asks the Audio Device to clear all software and hardware
buffers of the audio decoder device.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/audio-continue.rst
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......@@ -2,24 +2,23 @@
.. _AUDIO_CONTINUE:
==============
AUDIO_CONTINUE
==============
Description
-----------
NAME
----
This ioctl restarts the decoding and playing process previously paused
with AUDIO_PAUSE command.
AUDIO_CONTINUE
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = AUDIO_CONTINUE)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -39,11 +38,16 @@ Arguments
- Equals AUDIO_CONTINUE for this command.
Return Value
DESCRIPTION
-----------
This ioctl restarts the decoding and playing process previously paused
with AUDIO_PAUSE command.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/audio-fclose.rst
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......@@ -2,23 +2,23 @@
.. _audio_fclose:
=================
DVB audio close()
=================
Description
-----------
NAME
----
This system call closes a previously opened audio device.
DVB audio close()
Synopsis
SYNOPSIS
--------
.. c:function:: int close(int fd)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -32,10 +32,14 @@ Arguments
- File descriptor returned by a previous call to open().
Return Value
------------
DESCRIPTION
-----------
This system call closes a previously opened audio device.
RETURN VALUE
------------
.. flat-table::
:header-rows: 0
......@@ -47,6 +51,3 @@ Return Value
- ``EBADF``
- fd is not a valid open file descriptor.
Documentation/linux_tv/media/dvb/audio-fopen.rst
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......@@ -2,35 +2,23 @@
.. _audio_fopen:
================
DVB audio open()
================
Description
-----------
NAME
----
This system call opens a named audio device (e.g.
/dev/dvb/adapter0/audio0) for subsequent use. When an open() call has
succeeded, the device will be ready for use. The significance of
blocking or non-blocking mode is described in the documentation for
functions where there is a difference. It does not affect the semantics
of the open() call itself. A device opened in blocking mode can later be
put into non-blocking mode (and vice versa) using the F_SETFL command
of the fcntl system call. This is a standard system call, documented in
the Linux manual page for fcntl. Only one user can open the Audio Device
in O_RDWR mode. All other attempts to open the device in this mode will
fail, and an error code will be returned. If the Audio Device is opened
in O_RDONLY mode, the only ioctl call that can be used is
AUDIO_GET_STATUS. All other call will return with an error code.
DVB audio open()
Synopsis
SYNOPSIS
--------
.. c:function:: int open(const char *deviceName, int flags)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -70,11 +58,27 @@ Arguments
- (blocking mode is the default)
Return Value
------------
DESCRIPTION
-----------
This system call opens a named audio device (e.g.
/dev/dvb/adapter0/audio0) for subsequent use. When an open() call has
succeeded, the device will be ready for use. The significance of
blocking or non-blocking mode is described in the documentation for
functions where there is a difference. It does not affect the semantics
of the open() call itself. A device opened in blocking mode can later be
put into non-blocking mode (and vice versa) using the F_SETFL command
of the fcntl system call. This is a standard system call, documented in
the Linux manual page for fcntl. Only one user can open the Audio Device
in O_RDWR mode. All other attempts to open the device in this mode will
fail, and an error code will be returned. If the Audio Device is opened
in O_RDONLY mode, the only ioctl call that can be used is
AUDIO_GET_STATUS. All other call will return with an error code.
RETURN VALUE
------------
.. flat-table::
:header-rows: 0
:stub-columns: 0
......@@ -97,6 +101,3 @@ Return Value
- ``EINVAL``
- Invalid argument.
Documentation/linux_tv/media/dvb/audio-fwrite.rst
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......@@ -2,27 +2,23 @@
.. _audio_fwrite:
=================
DVB audio write()
=================
Description
-----------
NAME
----
This system call can only be used if AUDIO_SOURCE_MEMORY is selected
in the ioctl call AUDIO_SELECT_SOURCE. The data provided shall be in
PES format. If O_NONBLOCK is not specified the function will block
until buffer space is available. The amount of data to be transferred is
implied by count.
DVB audio write()
Synopsis
SYNOPSIS
--------
.. c:function:: size_t write(int fd, const void *buf, size_t count)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -48,11 +44,19 @@ Arguments
- Size of buf.
Return Value
------------
DESCRIPTION
-----------
This system call can only be used if AUDIO_SOURCE_MEMORY is selected
in the ioctl call AUDIO_SELECT_SOURCE. The data provided shall be in
PES format. If O_NONBLOCK is not specified the function will block
until buffer space is available. The amount of data to be transferred is
implied by count.
RETURN VALUE
------------
.. flat-table::
:header-rows: 0
:stub-columns: 0
......@@ -75,6 +79,3 @@ Return Value
- ``EBADF``
- fd is not a valid open file descriptor.
Documentation/linux_tv/media/dvb/audio-get-capabilities.rst
View file @ 586027ce
......@@ -2,24 +2,23 @@
.. _AUDIO_GET_CAPABILITIES:
======================
AUDIO_GET_CAPABILITIES
======================
Description
-----------
NAME
----
This ioctl call asks the Audio Device to tell us about the decoding
capabilities of the audio hardware.
AUDIO_GET_CAPABILITIES
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = AUDIO_GET_CAPABILITIES, unsigned int *cap)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -45,11 +44,16 @@ Arguments
- Returns a bit array of supported sound formats.
Return Value
DESCRIPTION
-----------
This ioctl call asks the Audio Device to tell us about the decoding
capabilities of the audio hardware.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/audio-get-pts.rst
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......@@ -2,28 +2,23 @@
.. _AUDIO_GET_PTS:
=============
AUDIO_GET_PTS
=============
Description
-----------
This ioctl is obsolete. Do not use in new drivers. If you need this
functionality, then please contact the linux-media mailing list
(`https://linuxtv.org/lists.php <https://linuxtv.org/lists.php>`__).
NAME
----
This ioctl call asks the Audio Device to return the current PTS
timestamp.
AUDIO_GET_PTS
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = AUDIO_GET_PTS, __u64 *pts)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -54,11 +49,20 @@ Arguments
decoded frame or the last PTS extracted by the PES parser.
Return Value
DESCRIPTION
-----------
This ioctl is obsolete. Do not use in new drivers. If you need this
functionality, then please contact the linux-media mailing list
(`https://linuxtv.org/lists.php <https://linuxtv.org/lists.php>`__).
This ioctl call asks the Audio Device to return the current PTS
timestamp.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/audio-get-status.rst
View file @ 586027ce
......@@ -2,24 +2,23 @@
.. _AUDIO_GET_STATUS:
================
AUDIO_GET_STATUS
================
Description
-----------
NAME
----
This ioctl call asks the Audio Device to return the current state of the
Audio Device.
AUDIO_GET_STATUS
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = AUDIO_GET_STATUS, struct audio_status *status)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -45,11 +44,16 @@ Arguments
- Returns the current state of Audio Device.
Return Value
DESCRIPTION
-----------
This ioctl call asks the Audio Device to return the current state of the
Audio Device.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/audio-pause.rst
View file @ 586027ce
......@@ -2,25 +2,23 @@
.. _AUDIO_PAUSE:
===========
AUDIO_PAUSE
===========
Description
-----------
NAME
----
This ioctl call suspends the audio stream being played. Decoding and
playing are paused. It is then possible to restart again decoding and
playing process of the audio stream using AUDIO_CONTINUE command.
AUDIO_PAUSE
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = AUDIO_PAUSE)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -40,11 +38,17 @@ Arguments
- Equals AUDIO_PAUSE for this command.
Return Value
DESCRIPTION
-----------
This ioctl call suspends the audio stream being played. Decoding and
playing are paused. It is then possible to restart again decoding and
playing process of the audio stream using AUDIO_CONTINUE command.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/audio-play.rst
View file @ 586027ce
......@@ -2,24 +2,23 @@
.. _AUDIO_PLAY:
==========
AUDIO_PLAY
==========
Description
-----------
NAME
----
This ioctl call asks the Audio Device to start playing an audio stream
from the selected source.
AUDIO_PLAY
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = AUDIO_PLAY)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -39,11 +38,16 @@ Arguments
- Equals AUDIO_PLAY for this command.
Return Value
DESCRIPTION
-----------
This ioctl call asks the Audio Device to start playing an audio stream
from the selected source.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/audio-select-source.rst
View file @ 586027ce
......@@ -2,26 +2,23 @@
.. _AUDIO_SELECT_SOURCE:
===================
AUDIO_SELECT_SOURCE
===================
Description
-----------
NAME
----
This ioctl call informs the audio device which source shall be used for
the input data. The possible sources are demux or memory. If
AUDIO_SOURCE_MEMORY is selected, the data is fed to the Audio Device
through the write command.
AUDIO_SELECT_SOURCE
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = AUDIO_SELECT_SOURCE, audio_stream_source_t source)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -47,11 +44,18 @@ Arguments
- Indicates the source that shall be used for the Audio stream.
Return Value
DESCRIPTION
-----------
This ioctl call informs the audio device which source shall be used for
the input data. The possible sources are demux or memory. If
AUDIO_SOURCE_MEMORY is selected, the data is fed to the Audio Device
through the write command.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/audio-set-attributes.rst
View file @ 586027ce
......@@ -2,24 +2,23 @@
.. _AUDIO_SET_ATTRIBUTES:
====================
AUDIO_SET_ATTRIBUTES
====================
Description
-----------
NAME
----
This ioctl is intended for DVD playback and allows you to set certain
information about the audio stream.
AUDIO_SET_ATTRIBUTES
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = AUDIO_SET_ATTRIBUTES, audio_attributes_t attr )
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -45,7 +44,14 @@ Arguments
- audio attributes according to section ??
Return Value
DESCRIPTION
-----------
This ioctl is intended for DVD playback and allows you to set certain
information about the audio stream.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......@@ -64,6 +70,3 @@ appropriately. The generic error codes are described at the
- ``EINVAL``
- attr is not a valid or supported attribute setting.
Documentation/linux_tv/media/dvb/audio-set-av-sync.rst
View file @ 586027ce
......@@ -2,24 +2,23 @@
.. _AUDIO_SET_AV_SYNC:
=================
AUDIO_SET_AV_SYNC
=================
Description
-----------
NAME
----
This ioctl call asks the Audio Device to turn ON or OFF A/V
synchronization.
AUDIO_SET_AV_SYNC
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = AUDIO_SET_AV_SYNC, boolean state)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -55,11 +54,16 @@ Arguments
- FALSE AV-sync OFF
Return Value
DESCRIPTION
-----------
This ioctl call asks the Audio Device to turn ON or OFF A/V
synchronization.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/audio-set-bypass-mode.rst
View file @ 586027ce
......@@ -2,27 +2,23 @@
.. _AUDIO_SET_BYPASS_MODE:
=====================
AUDIO_SET_BYPASS_MODE
=====================
Description
-----------
NAME
----
This ioctl call asks the Audio Device to bypass the Audio decoder and
forward the stream without decoding. This mode shall be used if streams
that can’t be handled by the DVB system shall be decoded. Dolby
DigitalTM streams are automatically forwarded by the DVB subsystem if
the hardware can handle it.
AUDIO_SET_BYPASS_MODE
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = AUDIO_SET_BYPASS_MODE, boolean mode)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -59,11 +55,19 @@ Arguments
- FALSE Bypass is enabled
Return Value
DESCRIPTION
-----------
This ioctl call asks the Audio Device to bypass the Audio decoder and
forward the stream without decoding. This mode shall be used if streams
that can’t be handled by the DVB system shall be decoded. Dolby
DigitalTM streams are automatically forwarded by the DVB subsystem if
the hardware can handle it.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/audio-set-ext-id.rst
View file @ 586027ce
......@@ -2,24 +2,23 @@
.. _AUDIO_SET_EXT_ID:
================
AUDIO_SET_EXT_ID
================
Description
-----------
NAME
----
This ioctl can be used to set the extension id for MPEG streams in DVD
playback. Only the first 3 bits are recognized.
AUDIO_SET_EXT_ID
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = AUDIO_SET_EXT_ID, int id)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -45,7 +44,14 @@ Arguments
- audio sub_stream_id
Return Value
DESCRIPTION
-----------
This ioctl can be used to set the extension id for MPEG streams in DVD
playback. Only the first 3 bits are recognized.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......@@ -64,6 +70,3 @@ appropriately. The generic error codes are described at the
- ``EINVAL``
- id is not a valid id.
Documentation/linux_tv/media/dvb/audio-set-id.rst
View file @ 586027ce
......@@ -2,29 +2,23 @@
.. _AUDIO_SET_ID:
============
AUDIO_SET_ID
============
Description
-----------
NAME
----
This ioctl selects which sub-stream is to be decoded if a program or
system stream is sent to the video device. If no audio stream type is
set the id has to be in [0xC0,0xDF] for MPEG sound, in [0x80,0x87] for
AC3 and in [0xA0,0xA7] for LPCM. More specifications may follow for
other stream types. If the stream type is set the id just specifies the
substream id of the audio stream and only the first 5 bits are
recognized.
AUDIO_SET_ID
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = AUDIO_SET_ID, int id)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -50,11 +44,21 @@ Arguments
- audio sub-stream id
Return Value
DESCRIPTION
-----------
This ioctl selects which sub-stream is to be decoded if a program or
system stream is sent to the video device. If no audio stream type is
set the id has to be in [0xC0,0xDF] for MPEG sound, in [0x80,0x87] for
AC3 and in [0xA0,0xA7] for LPCM. More specifications may follow for
other stream types. If the stream type is set the id just specifies the
substream id of the audio stream and only the first 5 bits are
recognized.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/audio-set-karaoke.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _AUDIO_SET_KARAOKE:
=================
AUDIO_SET_KARAOKE
=================
Description
-----------
NAME
----
This ioctl allows one to set the mixer settings for a karaoke DVD.
AUDIO_SET_KARAOKE
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = AUDIO_SET_KARAOKE, audio_karaoke_t *karaoke)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -44,7 +44,13 @@ Arguments
- karaoke settings according to section ??.
Return Value
DESCRIPTION
-----------
This ioctl allows one to set the mixer settings for a karaoke DVD.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/dvb/audio-set-mixer.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _AUDIO_SET_MIXER:
===============
AUDIO_SET_MIXER
===============
Description
-----------
NAME
----
This ioctl lets you adjust the mixer settings of the audio decoder.
AUDIO_SET_MIXER
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = AUDIO_SET_MIXER, audio_mixer_t *mix)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -44,11 +44,15 @@ Arguments
- mixer settings.
Return Value
DESCRIPTION
-----------
This ioctl lets you adjust the mixer settings of the audio decoder.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/audio-set-mute.rst
View file @ 586027ce
......@@ -2,28 +2,23 @@
.. _AUDIO_SET_MUTE:
==============
AUDIO_SET_MUTE
==============
Description
-----------
This ioctl is for DVB devices only. To control a V4L2 decoder use the
V4L2 :ref:`VIDIOC_DECODER_CMD` with the
``V4L2_DEC_CMD_START_MUTE_AUDIO`` flag instead.
NAME
----
This ioctl call asks the audio device to mute the stream that is
currently being played.
AUDIO_SET_MUTE
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = AUDIO_SET_MUTE, boolean state)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -59,11 +54,20 @@ Arguments
- FALSE Audio Un-mute
Return Value
DESCRIPTION
-----------
This ioctl is for DVB devices only. To control a V4L2 decoder use the
V4L2 :ref:`VIDIOC_DECODER_CMD` with the
``V4L2_DEC_CMD_START_MUTE_AUDIO`` flag instead.
This ioctl call asks the audio device to mute the stream that is
currently being played.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/audio-set-streamtype.rst
View file @ 586027ce
......@@ -2,25 +2,23 @@
.. _AUDIO_SET_STREAMTYPE:
====================
AUDIO_SET_STREAMTYPE
====================
Description
-----------
NAME
----
This ioctl tells the driver which kind of audio stream to expect. This
is useful if the stream offers several audio sub-streams like LPCM and
AC3.
AUDIO_SET_STREAMTYPE
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = AUDIO_SET_STREAMTYPE, int type)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -46,7 +44,15 @@ Arguments
- stream type
Return Value
DESCRIPTION
-----------
This ioctl tells the driver which kind of audio stream to expect. This
is useful if the stream offers several audio sub-streams like LPCM and
AC3.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......@@ -65,6 +71,3 @@ appropriately. The generic error codes are described at the
- ``EINVAL``
- type is not a valid or supported stream type.
Documentation/linux_tv/media/dvb/audio-stop.rst
View file @ 586027ce
......@@ -2,24 +2,23 @@
.. _AUDIO_STOP:
==========
AUDIO_STOP
==========
Description
-----------
NAME
----
This ioctl call asks the Audio Device to stop playing the current
stream.
AUDIO_STOP
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = AUDIO_STOP)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -39,11 +38,16 @@ Arguments
- Equals AUDIO_STOP for this command.
Return Value
DESCRIPTION
-----------
This ioctl call asks the Audio Device to stop playing the current
stream.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/ca-fclose.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _ca_fclose:
==============
DVB CA close()
==============
Description
-----------
NAME
----
This system call closes a previously opened audio device.
DVB CA close()
Synopsis
SYNOPSIS
--------
.. cpp:function:: int close(int fd)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -32,10 +32,14 @@ Arguments
- File descriptor returned by a previous call to open().
Return Value
------------
DESCRIPTION
-----------
This system call closes a previously opened audio device.
RETURN VALUE
------------
.. flat-table::
:header-rows: 0
......@@ -47,6 +51,3 @@ Return Value
- ``EBADF``
- fd is not a valid open file descriptor.
Documentation/linux_tv/media/dvb/ca-fopen.rst
View file @ 586027ce
......@@ -2,34 +2,23 @@
.. _ca_fopen:
=============
DVB CA open()
=============
Description
-----------
This system call opens a named ca device (e.g. /dev/ost/ca) for
subsequent use.
NAME
----
When an open() call has succeeded, the device will be ready for use. The
significance of blocking or non-blocking mode is described in the
documentation for functions where there is a difference. It does not
affect the semantics of the open() call itself. A device opened in
blocking mode can later be put into non-blocking mode (and vice versa)
using the F_SETFL command of the fcntl system call. This is a standard
system call, documented in the Linux manual page for fcntl. Only one
user can open the CA Device in O_RDWR mode. All other attempts to open
the device in this mode will fail, and an error code will be returned.
DVB CA open()
Synopsis
SYNOPSIS
--------
.. cpp:function:: int open(const char *deviceName, int flags)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -69,10 +58,25 @@ Arguments
- (blocking mode is the default)
Return Value
------------
DESCRIPTION
-----------
This system call opens a named ca device (e.g. /dev/ost/ca) for
subsequent use.
When an open() call has succeeded, the device will be ready for use. The
significance of blocking or non-blocking mode is described in the
documentation for functions where there is a difference. It does not
affect the semantics of the open() call itself. A device opened in
blocking mode can later be put into non-blocking mode (and vice versa)
using the F_SETFL command of the fcntl system call. This is a standard
system call, documented in the Linux manual page for fcntl. Only one
user can open the CA Device in O_RDWR mode. All other attempts to open
the device in this mode will fail, and an error code will be returned.
RETURN VALUE
------------
.. flat-table::
:header-rows: 0
......@@ -102,6 +106,3 @@ Return Value
- ``EINVAL``
- Invalid argument.
Documentation/linux_tv/media/dvb/ca-get-cap.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _CA_GET_CAP:
==========
CA_GET_CAP
==========
Description
-----------
NAME
----
This ioctl is undocumented. Documentation is welcome.
CA_GET_CAP
Synopsis
SYNOPSIS
--------
.. cpp:function:: int ioctl(fd, int request = CA_GET_CAP, ca_caps_t *)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -44,11 +44,15 @@ Arguments
- Undocumented.
Return Value
DESCRIPTION
-----------
This ioctl is undocumented. Documentation is welcome.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/ca-get-descr-info.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _CA_GET_DESCR_INFO:
=================
CA_GET_DESCR_INFO
=================
Description
-----------
NAME
----
This ioctl is undocumented. Documentation is welcome.
CA_GET_DESCR_INFO
Synopsis
SYNOPSIS
--------
.. cpp:function:: int ioctl(fd, int request = CA_GET_DESCR_INFO, ca_descr_info_t *)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -44,11 +44,15 @@ Arguments
- Undocumented.
Return Value
DESCRIPTION
-----------
This ioctl is undocumented. Documentation is welcome.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/ca-get-msg.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _CA_GET_MSG:
==========
CA_GET_MSG
==========
Description
-----------
NAME
----
This ioctl is undocumented. Documentation is welcome.
CA_GET_MSG
Synopsis
SYNOPSIS
--------
.. cpp:function:: int ioctl(fd, int request = CA_GET_MSG, ca_msg_t *)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -44,11 +44,15 @@ Arguments
- Undocumented.
Return Value
DESCRIPTION
-----------
This ioctl is undocumented. Documentation is welcome.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/ca-get-slot-info.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _CA_GET_SLOT_INFO:
================
CA_GET_SLOT_INFO
================
Description
-----------
NAME
----
This ioctl is undocumented. Documentation is welcome.
CA_GET_SLOT_INFO
Synopsis
SYNOPSIS
--------
.. cpp:function:: int ioctl(fd, int request = CA_GET_SLOT_INFO, ca_slot_info_t *)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -44,11 +44,15 @@ Arguments
- Undocumented.
Return Value
DESCRIPTION
-----------
This ioctl is undocumented. Documentation is welcome.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/ca-reset.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _CA_RESET:
========
CA_RESET
========
Description
-----------
NAME
----
This ioctl is undocumented. Documentation is welcome.
CA_RESET
Synopsis
SYNOPSIS
--------
.. cpp:function:: int ioctl(fd, int request = CA_RESET)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -38,11 +38,15 @@ Arguments
- Equals CA_RESET for this command.
Return Value
DESCRIPTION
-----------
This ioctl is undocumented. Documentation is welcome.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/ca-send-msg.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _CA_SEND_MSG:
===========
CA_SEND_MSG
===========
Description
-----------
NAME
----
This ioctl is undocumented. Documentation is welcome.
CA_SEND_MSG
Synopsis
SYNOPSIS
--------
.. cpp:function:: int ioctl(fd, int request = CA_SEND_MSG, ca_msg_t *)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -44,11 +44,15 @@ Arguments
- Undocumented.
Return Value
DESCRIPTION
-----------
This ioctl is undocumented. Documentation is welcome.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/ca-set-descr.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _CA_SET_DESCR:
============
CA_SET_DESCR
============
Description
-----------
NAME
----
This ioctl is undocumented. Documentation is welcome.
CA_SET_DESCR
Synopsis
SYNOPSIS
--------
.. cpp:function:: int ioctl(fd, int request = CA_SET_DESCR, ca_descr_t *)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -44,11 +44,15 @@ Arguments
- Undocumented.
Return Value
DESCRIPTION
-----------
This ioctl is undocumented. Documentation is welcome.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/ca-set-pid.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _CA_SET_PID:
==========
CA_SET_PID
==========
Description
-----------
NAME
----
This ioctl is undocumented. Documentation is welcome.
CA_SET_PID
Synopsis
SYNOPSIS
--------
.. cpp:function:: int ioctl(fd, int request = CA_SET_PID, ca_pid_t *)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -44,7 +44,13 @@ Arguments
- Undocumented.
Return Value
DESCRIPTION
-----------
This ioctl is undocumented. Documentation is welcome.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/dvb/dmx-add-pid.rst
View file @ 586027ce
......@@ -2,25 +2,23 @@
.. _DMX_ADD_PID:
===========
DMX_ADD_PID
===========
Description
-----------
NAME
----
This ioctl call allows to add multiple PIDs to a transport stream filter
previously set up with DMX_SET_PES_FILTER and output equal to
DMX_OUT_TSDEMUX_TAP.
DMX_ADD_PID
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = DMX_ADD_PID, __u16 *)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -46,11 +44,17 @@ Arguments
- PID number to be filtered.
Return Value
DESCRIPTION
-----------
This ioctl call allows to add multiple PIDs to a transport stream filter
previously set up with DMX_SET_PES_FILTER and output equal to
DMX_OUT_TSDEMUX_TAP.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/dmx-fclose.rst
View file @ 586027ce
......@@ -2,24 +2,23 @@
.. _dmx_fclose:
=================
DVB demux close()
=================
Description
-----------
NAME
----
This system call deactivates and deallocates a filter that was
previously allocated via the open() call.
DVB demux close()
Synopsis
SYNOPSIS
--------
.. c:function:: int close(int fd)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -33,11 +32,16 @@ Arguments
- File descriptor returned by a previous call to open().
Return Value
------------
DESCRIPTION
-----------
This system call deactivates and deallocates a filter that was
previously allocated via the open() call.
RETURN VALUE
------------
.. flat-table::
:header-rows: 0
:stub-columns: 0
......@@ -48,6 +52,3 @@ Return Value
- ``EBADF``
- fd is not a valid open file descriptor.
Documentation/linux_tv/media/dvb/dmx-fopen.rst
View file @ 586027ce
......@@ -2,38 +2,23 @@
.. _dmx_fopen:
================
DVB demux open()
================
Description
-----------
This system call, used with a device name of /dev/dvb/adapter0/demux0,
allocates a new filter and returns a handle which can be used for
subsequent control of that filter. This call has to be made for each
filter to be used, i.e. every returned file descriptor is a reference to
a single filter. /dev/dvb/adapter0/dvr0 is a logical device to be used
for retrieving Transport Streams for digital video recording. When
reading from this device a transport stream containing the packets from
all PES filters set in the corresponding demux device
(/dev/dvb/adapter0/demux0) having the output set to DMX_OUT_TS_TAP. A
recorded Transport Stream is replayed by writing to this device.
NAME
----
The significance of blocking or non-blocking mode is described in the
documentation for functions where there is a difference. It does not
affect the semantics of the open() call itself. A device opened in
blocking mode can later be put into non-blocking mode (and vice versa)
using the F_SETFL command of the fcntl system call.
DVB demux open()
Synopsis
SYNOPSIS
--------
.. c:function:: int open(const char *deviceName, int flags)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -68,11 +53,30 @@ Arguments
- (blocking mode is the default)
Return Value
------------
DESCRIPTION
-----------
This system call, used with a device name of /dev/dvb/adapter0/demux0,
allocates a new filter and returns a handle which can be used for
subsequent control of that filter. This call has to be made for each
filter to be used, i.e. every returned file descriptor is a reference to
a single filter. /dev/dvb/adapter0/dvr0 is a logical device to be used
for retrieving Transport Streams for digital video recording. When
reading from this device a transport stream containing the packets from
all PES filters set in the corresponding demux device
(/dev/dvb/adapter0/demux0) having the output set to DMX_OUT_TS_TAP. A
recorded Transport Stream is replayed by writing to this device.
The significance of blocking or non-blocking mode is described in the
documentation for functions where there is a difference. It does not
affect the semantics of the open() call itself. A device opened in
blocking mode can later be put into non-blocking mode (and vice versa)
using the F_SETFL command of the fcntl system call.
RETURN VALUE
------------
.. flat-table::
:header-rows: 0
:stub-columns: 0
......@@ -101,6 +105,3 @@ Return Value
- ``ENOMEM``
- The driver failed to allocate enough memory.
Documentation/linux_tv/media/dvb/dmx-fread.rst
View file @ 586027ce
......@@ -2,26 +2,23 @@
.. _dmx_fread:
================
DVB demux read()
================
Description
-----------
NAME
----
This system call returns filtered data, which might be section or PES
data. The filtered data is transferred from the driver’s internal
circular buffer to buf. The maximum amount of data to be transferred is
implied by count.
DVB demux read()
Synopsis
SYNOPSIS
--------
.. c:function:: size_t read(int fd, void *buf, size_t count)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -47,11 +44,18 @@ Arguments
- Size of buf.
Return Value
------------
DESCRIPTION
-----------
This system call returns filtered data, which might be section or PES
data. The filtered data is transferred from the driver’s internal
circular buffer to buf. The maximum amount of data to be transferred is
implied by count.
RETURN VALUE
------------
.. flat-table::
:header-rows: 0
:stub-columns: 0
......@@ -101,6 +105,3 @@ Return Value
- The driver failed to write to the callers buffer due to an invalid
\*buf pointer.
Documentation/linux_tv/media/dvb/dmx-fwrite.rst
View file @ 586027ce
......@@ -2,28 +2,23 @@
.. _dmx_fwrite:
=================
DVB demux write()
=================
Description
-----------
NAME
----
This system call is only provided by the logical device
/dev/dvb/adapter0/dvr0, associated with the physical demux device that
provides the actual DVR functionality. It is used for replay of a
digitally recorded Transport Stream. Matching filters have to be defined
in the corresponding physical demux device, /dev/dvb/adapter0/demux0.
The amount of data to be transferred is implied by count.
DVB demux write()
Synopsis
SYNOPSIS
--------
.. c:function:: ssize_t write(int fd, const void *buf, size_t count)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -49,11 +44,20 @@ Arguments
- Size of buf.
Return Value
------------
DESCRIPTION
-----------
This system call is only provided by the logical device
/dev/dvb/adapter0/dvr0, associated with the physical demux device that
provides the actual DVR functionality. It is used for replay of a
digitally recorded Transport Stream. Matching filters have to be defined
in the corresponding physical demux device, /dev/dvb/adapter0/demux0.
The amount of data to be transferred is implied by count.
RETURN VALUE
------------
.. flat-table::
:header-rows: 0
:stub-columns: 0
......@@ -82,6 +86,3 @@ Return Value
- ``EBADF``
- fd is not a valid open file descriptor.
Documentation/linux_tv/media/dvb/dmx-get-caps.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _DMX_GET_CAPS:
============
DMX_GET_CAPS
============
Description
-----------
NAME
----
This ioctl is undocumented. Documentation is welcome.
DMX_GET_CAPS
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = DMX_GET_CAPS, dmx_caps_t *)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -44,11 +44,15 @@ Arguments
- Undocumented.
Return Value
DESCRIPTION
-----------
This ioctl is undocumented. Documentation is welcome.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/dmx-get-event.rst
View file @ 586027ce
......@@ -2,27 +2,23 @@
.. _DMX_GET_EVENT:
=============
DMX_GET_EVENT
=============
Description
-----------
NAME
----
This ioctl call returns an event if available. If an event is not
available, the behavior depends on whether the device is in blocking or
non-blocking mode. In the latter case, the call fails immediately with
errno set to ``EWOULDBLOCK``. In the former case, the call blocks until an
event becomes available.
DMX_GET_EVENT
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl( int fd, int request = DMX_GET_EVENT, struct dmx_event *ev)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -48,7 +44,17 @@ Arguments
- Pointer to the location where the event is to be stored.
Return Value
DESCRIPTION
-----------
This ioctl call returns an event if available. If an event is not
available, the behavior depends on whether the device is in blocking or
non-blocking mode. In the latter case, the call fails immediately with
errno set to ``EWOULDBLOCK``. In the former case, the call blocks until an
event becomes available.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......@@ -67,6 +73,3 @@ appropriately. The generic error codes are described at the
- ``EWOULDBLOCK``
- There is no event pending, and the device is in non-blocking mode.
Documentation/linux_tv/media/dvb/dmx-get-pes-pids.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _DMX_GET_PES_PIDS:
================
DMX_GET_PES_PIDS
================
Description
-----------
NAME
----
This ioctl is undocumented. Documentation is welcome.
DMX_GET_PES_PIDS
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = DMX_GET_PES_PIDS, __u16[5])
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -44,11 +44,15 @@ Arguments
- Undocumented.
Return Value
DESCRIPTION
-----------
This ioctl is undocumented. Documentation is welcome.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/dmx-get-stc.rst
View file @ 586027ce
......@@ -2,28 +2,23 @@
.. _DMX_GET_STC:
===========
DMX_GET_STC
===========
Description
-----------
NAME
----
This ioctl call returns the current value of the system time counter
(which is driven by a PES filter of type DMX_PES_PCR). Some hardware
supports more than one STC, so you must specify which one by setting the
num field of stc before the ioctl (range 0...n). The result is returned
in form of a ratio with a 64 bit numerator and a 32 bit denominator, so
the real 90kHz STC value is stc->stc / stc->base .
DMX_GET_STC
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl( int fd, int request = DMX_GET_STC, struct dmx_stc *stc)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -49,7 +44,18 @@ Arguments
- Pointer to the location where the stc is to be stored.
Return Value
DESCRIPTION
-----------
This ioctl call returns the current value of the system time counter
(which is driven by a PES filter of type DMX_PES_PCR). Some hardware
supports more than one STC, so you must specify which one by setting the
num field of stc before the ioctl (range 0...n). The result is returned
in form of a ratio with a 64 bit numerator and a 32 bit denominator, so
the real 90kHz STC value is stc->stc / stc->base .
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......@@ -68,6 +74,3 @@ appropriately. The generic error codes are described at the
- ``EINVAL``
- Invalid stc number.
Documentation/linux_tv/media/dvb/dmx-remove-pid.rst
View file @ 586027ce
......@@ -2,26 +2,23 @@
.. _DMX_REMOVE_PID:
==============
DMX_REMOVE_PID
==============
Description
-----------
NAME
----
This ioctl call allows to remove a PID when multiple PIDs are set on a
transport stream filter, e. g. a filter previously set up with output
equal to DMX_OUT_TSDEMUX_TAP, created via either
DMX_SET_PES_FILTER or DMX_ADD_PID.
DMX_REMOVE_PID
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = DMX_REMOVE_PID, __u16 *)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -47,7 +44,16 @@ Arguments
- PID of the PES filter to be removed.
Return Value
DESCRIPTION
-----------
This ioctl call allows to remove a PID when multiple PIDs are set on a
transport stream filter, e. g. a filter previously set up with output
equal to DMX_OUT_TSDEMUX_TAP, created via either
DMX_SET_PES_FILTER or DMX_ADD_PID.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/dvb/dmx-set-buffer-size.rst
View file @ 586027ce
......@@ -2,26 +2,23 @@
.. _DMX_SET_BUFFER_SIZE:
===================
DMX_SET_BUFFER_SIZE
===================
Description
-----------
NAME
----
This ioctl call is used to set the size of the circular buffer used for
filtered data. The default size is two maximum sized sections, i.e. if
this function is not called a buffer size of 2 \* 4096 bytes will be
used.
DMX_SET_BUFFER_SIZE
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl( int fd, int request = DMX_SET_BUFFER_SIZE, unsigned long size)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -47,11 +44,18 @@ Arguments
- Size of circular buffer.
Return Value
DESCRIPTION
-----------
This ioctl call is used to set the size of the circular buffer used for
filtered data. The default size is two maximum sized sections, i.e. if
this function is not called a buffer size of 2 \* 4096 bytes will be
used.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/dmx-set-filter.rst
View file @ 586027ce
......@@ -2,32 +2,23 @@
.. _DMX_SET_FILTER:
==============
DMX_SET_FILTER
==============
Description
-----------
NAME
----
This ioctl call sets up a filter according to the filter and mask
parameters provided. A timeout may be defined stating number of seconds
to wait for a section to be loaded. A value of 0 means that no timeout
should be applied. Finally there is a flag field where it is possible to
state whether a section should be CRC-checked, whether the filter should
be a ”one-shot” filter, i.e. if the filtering operation should be
stopped after the first section is received, and whether the filtering
operation should be started immediately (without waiting for a
DMX_START ioctl call). If a filter was previously set-up, this filter
will be canceled, and the receive buffer will be flushed.
DMX_SET_FILTER
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl( int fd, int request = DMX_SET_FILTER, struct dmx_sct_filter_params *params)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -53,11 +44,24 @@ Arguments
- Pointer to structure containing filter parameters.
Return Value
DESCRIPTION
-----------
This ioctl call sets up a filter according to the filter and mask
parameters provided. A timeout may be defined stating number of seconds
to wait for a section to be loaded. A value of 0 means that no timeout
should be applied. Finally there is a flag field where it is possible to
state whether a section should be CRC-checked, whether the filter should
be a ”one-shot” filter, i.e. if the filtering operation should be
stopped after the first section is received, and whether the filtering
operation should be started immediately (without waiting for a
DMX_START ioctl call). If a filter was previously set-up, this filter
will be canceled, and the receive buffer will be flushed.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/dmx-set-pes-filter.rst
View file @ 586027ce
......@@ -2,26 +2,23 @@
.. _DMX_SET_PES_FILTER:
==================
DMX_SET_PES_FILTER
==================
Description
-----------
NAME
----
This ioctl call sets up a PES filter according to the parameters
provided. By a PES filter is meant a filter that is based just on the
packet identifier (PID), i.e. no PES header or payload filtering
capability is supported.
DMX_SET_PES_FILTER
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl( int fd, int request = DMX_SET_PES_FILTER, struct dmx_pes_filter_params *params)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -47,7 +44,16 @@ Arguments
- Pointer to structure containing filter parameters.
Return Value
DESCRIPTION
-----------
This ioctl call sets up a PES filter according to the parameters
provided. By a PES filter is meant a filter that is based just on the
packet identifier (PID), i.e. no PES header or payload filtering
capability is supported.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......@@ -69,6 +75,3 @@ appropriately. The generic error codes are described at the
There are active filters filtering data from another input source.
Make sure that these filters are stopped before starting this
filter.
Documentation/linux_tv/media/dvb/dmx-set-source.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _DMX_SET_SOURCE:
==============
DMX_SET_SOURCE
==============
Description
-----------
NAME
----
This ioctl is undocumented. Documentation is welcome.
DMX_SET_SOURCE
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = DMX_SET_SOURCE, dmx_source_t *)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -44,11 +44,15 @@ Arguments
- Undocumented.
Return Value
DESCRIPTION
-----------
This ioctl is undocumented. Documentation is welcome.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/dmx-start.rst
View file @ 586027ce
......@@ -2,24 +2,23 @@
.. _DMX_START:
=========
DMX_START
=========
Description
-----------
NAME
----
This ioctl call is used to start the actual filtering operation defined
via the ioctl calls DMX_SET_FILTER or DMX_SET_PES_FILTER.
DMX_START
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl( int fd, int request = DMX_START)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -39,7 +38,14 @@ Arguments
- Equals DMX_START for this command.
Return Value
DESCRIPTION
-----------
This ioctl call is used to start the actual filtering operation defined
via the ioctl calls DMX_SET_FILTER or DMX_SET_PES_FILTER.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......@@ -68,6 +74,3 @@ appropriately. The generic error codes are described at the
There are active filters filtering data from another input source.
Make sure that these filters are stopped before starting this
filter.
Documentation/linux_tv/media/dvb/dmx-stop.rst
View file @ 586027ce
......@@ -2,25 +2,23 @@
.. _DMX_STOP:
========
DMX_STOP
========
Description
-----------
NAME
----
This ioctl call is used to stop the actual filtering operation defined
via the ioctl calls DMX_SET_FILTER or DMX_SET_PES_FILTER and
started via the DMX_START command.
DMX_STOP
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl( int fd, int request = DMX_STOP)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -40,11 +38,17 @@ Arguments
- Equals DMX_STOP for this command.
Return Value
DESCRIPTION
-----------
This ioctl call is used to stop the actual filtering operation defined
via the ioctl calls DMX_SET_FILTER or DMX_SET_PES_FILTER and
started via the DMX_START command.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/fe-diseqc-recv-slave-reply.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl FE_DISEQC_RECV_SLAVE_REPLY
********************************
*man FE_DISEQC_RECV_SLAVE_REPLY(2)*
NAME
====
Receives reply from a DiSEqC 2.0 command
FE_DISEQC_RECV_SLAVE_REPLY - Receives reply from a DiSEqC 2.0 command
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct dvb_diseqc_slave_reply *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -30,12 +31,14 @@ Arguments
:ref:`dvb_diseqc_slave_reply <dvb-diseqc-slave-reply>`
Description
DESCRIPTION
===========
Receives reply from a DiSEqC 2.0 command.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/fe-diseqc-reset-overload.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl FE_DISEQC_RESET_OVERLOAD
******************************
*man FE_DISEQC_RESET_OVERLOAD(2)*
NAME
====
Restores the power to the antenna subsystem, if it was powered off due
to power overload.
FE_DISEQC_RESET_OVERLOAD - Restores the power to the antenna subsystem, if it was powered off due - to power overload.
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, NULL )
Arguments
ARGUMENTS
=========
``fd``
......@@ -27,7 +27,7 @@ Arguments
FE_DISEQC_RESET_OVERLOAD
Description
DESCRIPTION
===========
If the bus has been automatically powered off due to power overload,
......@@ -35,7 +35,9 @@ this ioctl call restores the power to the bus. The call requires
read/write access to the device. This call has no effect if the device
is manually powered off. Not all DVB adapters support this ioctl.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/fe-diseqc-send-burst.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl FE_DISEQC_SEND_BURST
**************************
*man FE_DISEQC_SEND_BURST(2)*
NAME
====
Sends a 22KHz tone burst for 2x1 mini DiSEqC satellite selection.
FE_DISEQC_SEND_BURST - Sends a 22KHz tone burst for 2x1 mini DiSEqC satellite selection.
Synopsis
SYNOPSIS
========
.. c:function:: int ioctl( int fd, int request, enum fe_sec_mini_cmd *tone )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +30,7 @@ Arguments
pointer to enum :ref:`fe_sec_mini_cmd <fe-sec-mini-cmd>`
Description
DESCRIPTION
===========
This ioctl is used to set the generation of a 22kHz tone burst for mini
......@@ -39,7 +40,9 @@ read/write permissions.
It provides support for what's specified at
`Digital Satellite Equipment Control (DiSEqC) - Simple "ToneBurst" Detection Circuit specification. <http://www.eutelsat.com/files/contributed/satellites/pdf/Diseqc/associated%20docs/simple_tone_burst_detec.pdf>`__
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/fe-diseqc-send-master-cmd.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl FE_DISEQC_SEND_MASTER_CMD
*******************************
*man FE_DISEQC_SEND_MASTER_CMD(2)*
NAME
====
Sends a DiSEqC command
FE_DISEQC_SEND_MASTER_CMD - Sends a DiSEqC command
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct dvb_diseqc_master_cmd *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -30,12 +31,14 @@ Arguments
:ref:`dvb_diseqc_master_cmd <dvb-diseqc-master-cmd>`
Description
DESCRIPTION
===========
Sends a DiSEqC command to the antenna subsystem.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/fe-enable-high-lnb-voltage.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl FE_ENABLE_HIGH_LNB_VOLTAGE
********************************
*man FE_ENABLE_HIGH_LNB_VOLTAGE(2)*
Select output DC level between normal LNBf voltages or higher LNBf
voltages.
NAME
====
FE_ENABLE_HIGH_LNB_VOLTAGE - Select output DC level between normal LNBf voltages or higher LNBf - voltages.
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, unsigned int high )
Arguments
ARGUMENTS
=========
``fd``
......@@ -35,14 +35,16 @@ Arguments
to compensate for long antenna cables.
Description
DESCRIPTION
===========
Select output DC level between normal LNBf voltages or higher LNBf
voltages between 0 (normal) or a value grater than 0 for higher
voltages.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/fe-get-info.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl FE_GET_INFO
*****************
*man FE_GET_INFO(2)*
NAME
====
Query DVB frontend capabilities and returns information about the
front-end. This call only requires read-only access to the device
FE_GET_INFO - Query DVB frontend capabilities and returns information about the - front-end. This call only requires read-only access to the device
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct dvb_frontend_info *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +31,7 @@ Arguments
:ref:`dvb_frontend_info <dvb-frontend-info>`
Description
DESCRIPTION
===========
All DVB frontend devices support the ``FE_GET_INFO`` ioctl. It is used
......@@ -41,7 +41,9 @@ takes a pointer to dvb_frontend_info which is filled by the driver.
When the driver is not compatible with this specification the ioctl
returns an error.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/fe-get-property.rst
View file @ 586027ce
......@@ -6,19 +6,18 @@
ioctl FE_SET_PROPERTY, FE_GET_PROPERTY
**************************************
*man FE_SET_PROPERTY(2)*
NAME
====
FE_GET_PROPERTY
FE_SET_PROPERTY sets one or more frontend properties.
FE_GET_PROPERTY returns one or more frontend properties.
FE_SET_PROPERTY - FE_GET_PROPERTY - FE_SET_PROPERTY sets one or more frontend properties. - FE_GET_PROPERTY returns one or more frontend properties.
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct dtv_properties *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +30,7 @@ Arguments
pointer to struct :ref:`dtv_properties <dtv-properties>`
Description
DESCRIPTION
===========
All DVB frontend devices support the ``FE_SET_PROPERTY`` and
......@@ -59,7 +58,9 @@ depends on the delivery system and on the device:
- This call only requires read-only access to the device.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/fe-read-status.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl FE_READ_STATUS
********************
*man FE_READ_STATUS(2)*
NAME
====
Returns status information about the front-end. This call only requires
read-only access to the device
FE_READ_STATUS - Returns status information about the front-end. This call only requires - read-only access to the device
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, unsigned int *status )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +31,7 @@ Arguments
:ref:`fe_status <fe-status>`.
Description
DESCRIPTION
===========
All DVB frontend devices support the ``FE_READ_STATUS`` ioctl. It is
......@@ -43,7 +43,9 @@ NOTE: the size of status is actually sizeof(enum fe_status), with
varies according with the architecture. This needs to be fixed in the
future.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/fe-set-frontend-tune-mode.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl FE_SET_FRONTEND_TUNE_MODE
*******************************
*man FE_SET_FRONTEND_TUNE_MODE(2)*
NAME
====
Allow setting tuner mode flags to the frontend.
FE_SET_FRONTEND_TUNE_MODE - Allow setting tuner mode flags to the frontend.
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, unsigned int flags )
Arguments
ARGUMENTS
=========
``fd``
......@@ -38,13 +39,15 @@ Arguments
device is reopened read-write.
Description
DESCRIPTION
===========
Allow setting tuner mode flags to the frontend, between 0 (normal) or
FE_TUNE_MODE_ONESHOT mode
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/fe-set-tone.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl FE_SET_TONE
*****************
*man FE_SET_TONE(2)*
NAME
====
Sets/resets the generation of the continuous 22kHz tone.
FE_SET_TONE - Sets/resets the generation of the continuous 22kHz tone.
Synopsis
SYNOPSIS
========
.. c:function:: int ioctl( int fd, int request, enum fe_sec_tone_mode *tone )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +30,7 @@ Arguments
pointer to enum :ref:`fe_sec_tone_mode <fe-sec-tone-mode>`
Description
DESCRIPTION
===========
This ioctl is used to set the generation of the continuous 22kHz tone.
......@@ -45,7 +46,9 @@ a tone may interfere on other devices, as they may lose the capability
of selecting the band. So, it is recommended that applications would
change to SEC_TONE_OFF when the device is not used.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/fe-set-voltage.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl FE_SET_VOLTAGE
********************
*man FE_SET_VOLTAGE(2)*
NAME
====
Allow setting the DC level sent to the antenna subsystem.
FE_SET_VOLTAGE - Allow setting the DC level sent to the antenna subsystem.
Synopsis
SYNOPSIS
========
.. c:function:: int ioctl( int fd, int request, enum fe_sec_voltage *voltage )
Arguments
ARGUMENTS
=========
``fd``
......@@ -32,7 +33,7 @@ Arguments
:ref:`fe_sec_voltage <fe-sec-voltage>`.
Description
DESCRIPTION
===========
This ioctl allows to set the DC voltage level sent through the antenna
......@@ -52,7 +53,9 @@ capability of setting polarization or IF. So, on those cases, setting
the voltage to SEC_VOLTAGE_OFF while the device is not is used is
recommended.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/frontend_f_close.rst
View file @ 586027ce
......@@ -6,12 +6,12 @@
DVB frontend close()
********************
*man fe-close(2)*
NAME
====
Close a frontend device
fe-close - Close a frontend device
Synopsis
SYNOPSIS
========
.. code-block:: c
......@@ -21,14 +21,15 @@ Synopsis
.. cpp:function:: int close( int fd )
Arguments
ARGUMENTS
=========
``fd``
File descriptor returned by :ref:`open() <func-open>`.
Description
DESCRIPTION
===========
This system call closes a previously opened front-end device. After
......@@ -36,7 +37,7 @@ closing a front-end device, its corresponding hardware might be powered
down automatically.
Return Value
RETURN VALUE
============
The function returns 0 on success, -1 on failure and the ``errno`` is
......
Documentation/linux_tv/media/dvb/frontend_f_open.rst
View file @ 586027ce
......@@ -6,12 +6,12 @@
DVB frontend open()
*******************
*man fe-open(2)*
NAME
====
Open a frontend device
fe-open - Open a frontend device
Synopsis
SYNOPSIS
========
.. code-block:: c
......@@ -21,7 +21,8 @@ Synopsis
.. cpp:function:: int open( const char *device_name, int flags )
Arguments
ARGUMENTS
=========
``device_name``
......@@ -43,7 +44,7 @@ Arguments
Other flags have no effect.
Description
DESCRIPTION
===========
This system call opens a named frontend device
......@@ -69,7 +70,7 @@ powered up, and that other front-ends may have been powered down to make
that possible.
Return Value
RETURN VALUE
============
On success :ref:`open() <frontend_f_open>` returns the new file descriptor.
......
Documentation/linux_tv/media/dvb/net-add-if.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl NET_ADD_IF
****************
*man NET_ADD_IF(2)*
NAME
====
Creates a new network interface for a given Packet ID.
NET_ADD_IF - Creates a new network interface for a given Packet ID.
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct dvb_net_if *net_if )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +30,7 @@ Arguments
pointer to struct :ref:`dvb_net_if <dvb-net-if>`
Description
DESCRIPTION
===========
The NET_ADD_IF ioctl system call selects the Packet ID (PID) that
......@@ -80,7 +81,9 @@ struct dvb_net_if description
``DVB_NET_FEEDTYPE_MPE`` for MPE encoding or
``DVB_NET_FEEDTYPE_ULE`` for ULE encoding.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/net-get-if.rst
View file @ 586027ce
.. -*- coding: utf-8; mode: rst -*-
.. _NET_GET_IF:
****************
ioctl NET_GET_IF
****************
*man NET_GET_IF(2)*
Read the configuration data of an interface created via
:ref:`NET_ADD_IF <net>`.
NAME
====
NET_GET_IF - Read the configuration data of an interface created via - :ref:`NET_ADD_IF <net>`.
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct dvb_net_if *net_if )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +30,7 @@ Arguments
pointer to struct :ref:`dvb_net_if <dvb-net-if>`
Description
DESCRIPTION
===========
The NET_GET_IF ioctl uses the interface number given by the struct
......@@ -41,7 +40,9 @@ encapsulation type used on such interface. If the interface was not
created yet with :ref:`NET_ADD_IF <net>`, it will return -1 and fill
the ``errno`` with ``EINVAL`` error code.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/net-remove-if.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl NET_REMOVE_IF
*******************
*man NET_REMOVE_IF(2)*
NAME
====
Removes a network interface.
NET_REMOVE_IF - Removes a network interface.
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, int ifnum )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,13 +30,15 @@ Arguments
number of the interface to be removed
Description
DESCRIPTION
===========
The NET_REMOVE_IF ioctl deletes an interface previously created via
:ref:`NET_ADD_IF <net>`.
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
......
Documentation/linux_tv/media/dvb/video-clear-buffer.rst
View file @ 586027ce
......@@ -2,24 +2,23 @@
.. _VIDEO_CLEAR_BUFFER:
==================
VIDEO_CLEAR_BUFFER
==================
Description
-----------
NAME
----
This ioctl call clears all video buffers in the driver and in the
decoder hardware.
VIDEO_CLEAR_BUFFER
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_CLEAR_BUFFER)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -39,11 +38,16 @@ Arguments
- Equals VIDEO_CLEAR_BUFFER for this command.
Return Value
DESCRIPTION
-----------
This ioctl call clears all video buffers in the driver and in the
decoder hardware.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-command.rst
View file @ 586027ce
......@@ -2,30 +2,23 @@
.. _VIDEO_COMMAND:
=============
VIDEO_COMMAND
=============
Description
-----------
NAME
----
This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
this ioctl has been replaced by the
:ref:`VIDIOC_DECODER_CMD` ioctl.
This ioctl commands the decoder. The ``video_command`` struct is a
subset of the ``v4l2_decoder_cmd`` struct, so refer to the
:ref:`VIDIOC_DECODER_CMD` documentation for
more information.
VIDEO_COMMAND
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = VIDEO_COMMAND, struct video_command *cmd)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -51,11 +44,22 @@ Arguments
- Commands the decoder.
Return Value
DESCRIPTION
-----------
This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
this ioctl has been replaced by the
:ref:`VIDIOC_DECODER_CMD` ioctl.
This ioctl commands the decoder. The ``video_command`` struct is a
subset of the ``v4l2_decoder_cmd`` struct, so refer to the
:ref:`VIDIOC_DECODER_CMD` documentation for
more information.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-continue.rst
View file @ 586027ce
......@@ -2,27 +2,23 @@
.. _VIDEO_CONTINUE:
==============
VIDEO_CONTINUE
==============
Description
-----------
This ioctl is for DVB devices only. To control a V4L2 decoder use the
V4L2 :ref:`VIDIOC_DECODER_CMD` instead.
NAME
----
This ioctl call restarts decoding and playing processes of the video
stream which was played before a call to VIDEO_FREEZE was made.
VIDEO_CONTINUE
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_CONTINUE)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -42,11 +38,19 @@ Arguments
- Equals VIDEO_CONTINUE for this command.
Return Value
DESCRIPTION
-----------
This ioctl is for DVB devices only. To control a V4L2 decoder use the
V4L2 :ref:`VIDIOC_DECODER_CMD` instead.
This ioctl call restarts decoding and playing processes of the video
stream which was played before a call to VIDEO_FREEZE was made.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-fast-forward.rst
View file @ 586027ce
......@@ -2,25 +2,23 @@
.. _VIDEO_FAST_FORWARD:
==================
VIDEO_FAST_FORWARD
==================
Description
-----------
NAME
----
This ioctl call asks the Video Device to skip decoding of N number of
I-frames. This call can only be used if VIDEO_SOURCE_MEMORY is
selected.
VIDEO_FAST_FORWARD
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_FAST_FORWARD, int nFrames)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -46,7 +44,15 @@ Arguments
- The number of frames to skip.
Return Value
DESCRIPTION
-----------
This ioctl call asks the Video Device to skip decoding of N number of
I-frames. This call can only be used if VIDEO_SOURCE_MEMORY is
selected.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......@@ -65,6 +71,3 @@ appropriately. The generic error codes are described at the
- ``EPERM``
- Mode VIDEO_SOURCE_MEMORY not selected.
Documentation/linux_tv/media/dvb/video-fclose.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _video_fclose:
=================
dvb video close()
=================
Description
-----------
NAME
----
This system call closes a previously opened video device.
dvb video close()
Synopsis
SYNOPSIS
--------
.. c:function:: int close(int fd)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -32,10 +32,14 @@ Arguments
- File descriptor returned by a previous call to open().
Return Value
------------
DESCRIPTION
-----------
This system call closes a previously opened video device.
RETURN VALUE
------------
.. flat-table::
:header-rows: 0
......@@ -47,6 +51,3 @@ Return Value
- ``EBADF``
- fd is not a valid open file descriptor.
Documentation/linux_tv/media/dvb/video-fopen.rst
View file @ 586027ce
......@@ -2,35 +2,23 @@
.. _video_fopen:
================
dvb video open()
================
Description
-----------
This system call opens a named video device (e.g.
/dev/dvb/adapter0/video0) for subsequent use.
NAME
----
When an open() call has succeeded, the device will be ready for use. The
significance of blocking or non-blocking mode is described in the
documentation for functions where there is a difference. It does not
affect the semantics of the open() call itself. A device opened in
blocking mode can later be put into non-blocking mode (and vice versa)
using the F_SETFL command of the fcntl system call. This is a standard
system call, documented in the Linux manual page for fcntl. Only one
user can open the Video Device in O_RDWR mode. All other attempts to
open the device in this mode will fail, and an error-code will be
returned. If the Video Device is opened in O_RDONLY mode, the only
ioctl call that can be used is VIDEO_GET_STATUS. All other call will
return an error code.
dvb video open()
Synopsis
SYNOPSIS
--------
.. c:function:: int open(const char *deviceName, int flags)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -70,11 +58,29 @@ Arguments
- (blocking mode is the default)
Return Value
------------
DESCRIPTION
-----------
This system call opens a named video device (e.g.
/dev/dvb/adapter0/video0) for subsequent use.
When an open() call has succeeded, the device will be ready for use. The
significance of blocking or non-blocking mode is described in the
documentation for functions where there is a difference. It does not
affect the semantics of the open() call itself. A device opened in
blocking mode can later be put into non-blocking mode (and vice versa)
using the F_SETFL command of the fcntl system call. This is a standard
system call, documented in the Linux manual page for fcntl. Only one
user can open the Video Device in O_RDWR mode. All other attempts to
open the device in this mode will fail, and an error-code will be
returned. If the Video Device is opened in O_RDONLY mode, the only
ioctl call that can be used is VIDEO_GET_STATUS. All other call will
return an error code.
RETURN VALUE
------------
.. flat-table::
:header-rows: 0
:stub-columns: 0
......@@ -103,6 +109,3 @@ Return Value
- ``EINVAL``
- Invalid argument.
Documentation/linux_tv/media/dvb/video-freeze.rst
View file @ 586027ce
......@@ -2,31 +2,23 @@
.. _VIDEO_FREEZE:
============
VIDEO_FREEZE
============
Description
-----------
NAME
----
This ioctl is for DVB devices only. To control a V4L2 decoder use the
V4L2 :ref:`VIDIOC_DECODER_CMD` instead.
This ioctl call suspends the live video stream being played. Decoding
and playing are frozen. It is then possible to restart the decoding and
playing process of the video stream using the VIDEO_CONTINUE command.
If VIDEO_SOURCE_MEMORY is selected in the ioctl call
VIDEO_SELECT_SOURCE, the DVB subsystem will not decode any more data
until the ioctl call VIDEO_CONTINUE or VIDEO_PLAY is performed.
VIDEO_FREEZE
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_FREEZE)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -46,11 +38,23 @@ Arguments
- Equals VIDEO_FREEZE for this command.
Return Value
DESCRIPTION
-----------
This ioctl is for DVB devices only. To control a V4L2 decoder use the
V4L2 :ref:`VIDIOC_DECODER_CMD` instead.
This ioctl call suspends the live video stream being played. Decoding
and playing are frozen. It is then possible to restart the decoding and
playing process of the video stream using the VIDEO_CONTINUE command.
If VIDEO_SOURCE_MEMORY is selected in the ioctl call
VIDEO_SELECT_SOURCE, the DVB subsystem will not decode any more data
until the ioctl call VIDEO_CONTINUE or VIDEO_PLAY is performed.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-fwrite.rst
View file @ 586027ce
......@@ -2,27 +2,23 @@
.. _video_fwrite:
=================
dvb video write()
=================
Description
-----------
NAME
----
This system call can only be used if VIDEO_SOURCE_MEMORY is selected
in the ioctl call VIDEO_SELECT_SOURCE. The data provided shall be in
PES format, unless the capability allows other formats. If O_NONBLOCK
is not specified the function will block until buffer space is
available. The amount of data to be transferred is implied by count.
dvb video write()
Synopsis
SYNOPSIS
--------
.. c:function:: size_t write(int fd, const void *buf, size_t count)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -48,11 +44,19 @@ Arguments
- Size of buf.
Return Value
------------
DESCRIPTION
-----------
This system call can only be used if VIDEO_SOURCE_MEMORY is selected
in the ioctl call VIDEO_SELECT_SOURCE. The data provided shall be in
PES format, unless the capability allows other formats. If O_NONBLOCK
is not specified the function will block until buffer space is
available. The amount of data to be transferred is implied by count.
RETURN VALUE
------------
.. flat-table::
:header-rows: 0
:stub-columns: 0
......@@ -75,6 +79,3 @@ Return Value
- ``EBADF``
- fd is not a valid open file descriptor.
Documentation/linux_tv/media/dvb/video-get-capabilities.rst
View file @ 586027ce
......@@ -2,25 +2,23 @@
.. _VIDEO_GET_CAPABILITIES:
======================
VIDEO_GET_CAPABILITIES
======================
Description
-----------
NAME
----
This ioctl call asks the video device about its decoding capabilities.
On success it returns and integer which has bits set according to the
defines in section ??.
VIDEO_GET_CAPABILITIES
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_GET_CAPABILITIES, unsigned int *cap)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -46,11 +44,17 @@ Arguments
- Pointer to a location where to store the capability information.
Return Value
DESCRIPTION
-----------
This ioctl call asks the video device about its decoding capabilities.
On success it returns and integer which has bits set according to the
defines in section ??.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-get-event.rst
View file @ 586027ce
......@@ -2,35 +2,23 @@
.. _VIDEO_GET_EVENT:
===============
VIDEO_GET_EVENT
===============
Description
-----------
This ioctl is for DVB devices only. To get events from a V4L2 decoder
use the V4L2 :ref:`VIDIOC_DQEVENT` ioctl instead.
NAME
----
This ioctl call returns an event of type video_event if available. If
an event is not available, the behavior depends on whether the device is
in blocking or non-blocking mode. In the latter case, the call fails
immediately with errno set to ``EWOULDBLOCK``. In the former case, the call
blocks until an event becomes available. The standard Linux poll()
and/or select() system calls can be used with the device file descriptor
to watch for new events. For select(), the file descriptor should be
included in the exceptfds argument, and for poll(), POLLPRI should be
specified as the wake-up condition. Read-only permissions are sufficient
for this ioctl call.
VIDEO_GET_EVENT
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_GET_EVENT, struct video_event *ev)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -56,7 +44,25 @@ Arguments
- Points to the location where the event, if any, is to be stored.
Return Value
DESCRIPTION
-----------
This ioctl is for DVB devices only. To get events from a V4L2 decoder
use the V4L2 :ref:`VIDIOC_DQEVENT` ioctl instead.
This ioctl call returns an event of type video_event if available. If
an event is not available, the behavior depends on whether the device is
in blocking or non-blocking mode. In the latter case, the call fails
immediately with errno set to ``EWOULDBLOCK``. In the former case, the call
blocks until an event becomes available. The standard Linux poll()
and/or select() system calls can be used with the device file descriptor
to watch for new events. For select(), the file descriptor should be
included in the exceptfds argument, and for poll(), POLLPRI should be
specified as the wake-up condition. Read-only permissions are sufficient
for this ioctl call.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......@@ -81,6 +87,3 @@ appropriately. The generic error codes are described at the
- ``EOVERFLOW``
- Overflow in event queue - one or more events were lost.
Documentation/linux_tv/media/dvb/video-get-frame-count.rst
View file @ 586027ce
......@@ -2,28 +2,23 @@
.. _VIDEO_GET_FRAME_COUNT:
=====================
VIDEO_GET_FRAME_COUNT
=====================
Description
-----------
This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
this ioctl has been replaced by the ``V4L2_CID_MPEG_VIDEO_DEC_FRAME``
control.
NAME
----
This ioctl call asks the Video Device to return the number of displayed
frames since the decoder was started.
VIDEO_GET_FRAME_COUNT
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = VIDEO_GET_FRAME_COUNT, __u64 *pts)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -50,11 +45,20 @@ Arguments
started.
Return Value
DESCRIPTION
-----------
This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
this ioctl has been replaced by the ``V4L2_CID_MPEG_VIDEO_DEC_FRAME``
control.
This ioctl call asks the Video Device to return the number of displayed
frames since the decoder was started.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-get-frame-rate.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _VIDEO_GET_FRAME_RATE:
====================
VIDEO_GET_FRAME_RATE
====================
Description
-----------
NAME
----
This ioctl call asks the Video Device to return the current framerate.
VIDEO_GET_FRAME_RATE
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = VIDEO_GET_FRAME_RATE, unsigned int *rate)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -44,11 +44,15 @@ Arguments
- Returns the framerate in number of frames per 1000 seconds.
Return Value
DESCRIPTION
-----------
This ioctl call asks the Video Device to return the current framerate.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-get-navi.rst
View file @ 586027ce
......@@ -2,25 +2,23 @@
.. _VIDEO_GET_NAVI:
==============
VIDEO_GET_NAVI
==============
Description
-----------
NAME
----
This ioctl returns navigational information from the DVD stream. This is
especially needed if an encoded stream has to be decoded by the
hardware.
VIDEO_GET_NAVI
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_GET_NAVI , video_navi_pack_t *navipack)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -46,7 +44,15 @@ Arguments
- PCI or DSI pack (private stream 2) according to section ??.
Return Value
DESCRIPTION
-----------
This ioctl returns navigational information from the DVD stream. This is
especially needed if an encoded stream has to be decoded by the
hardware.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......@@ -65,6 +71,3 @@ appropriately. The generic error codes are described at the
- ``EFAULT``
- driver is not able to return navigational information
Documentation/linux_tv/media/dvb/video-get-pts.rst
View file @ 586027ce
......@@ -2,28 +2,23 @@
.. _VIDEO_GET_PTS:
=============
VIDEO_GET_PTS
=============
Description
-----------
This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
this ioctl has been replaced by the ``V4L2_CID_MPEG_VIDEO_DEC_PTS``
control.
NAME
----
This ioctl call asks the Video Device to return the current PTS
timestamp.
VIDEO_GET_PTS
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = VIDEO_GET_PTS, __u64 *pts)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -54,11 +49,20 @@ Arguments
decoded frame or the last PTS extracted by the PES parser.
Return Value
DESCRIPTION
-----------
This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
this ioctl has been replaced by the ``V4L2_CID_MPEG_VIDEO_DEC_PTS``
control.
This ioctl call asks the Video Device to return the current PTS
timestamp.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-get-size.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _VIDEO_GET_SIZE:
==============
VIDEO_GET_SIZE
==============
Description
-----------
NAME
----
This ioctl returns the size and aspect ratio.
VIDEO_GET_SIZE
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = VIDEO_GET_SIZE, video_size_t *size)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -44,11 +44,15 @@ Arguments
- Returns the size and aspect ratio.
Return Value
DESCRIPTION
-----------
This ioctl returns the size and aspect ratio.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-get-status.rst
View file @ 586027ce
......@@ -2,24 +2,23 @@
.. _VIDEO_GET_STATUS:
================
VIDEO_GET_STATUS
================
Description
-----------
NAME
----
This ioctl call asks the Video Device to return the current status of
the device.
VIDEO_GET_STATUS
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_GET_STATUS, struct video_status *status)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -45,11 +44,16 @@ Arguments
- Returns the current status of the Video Device.
Return Value
DESCRIPTION
-----------
This ioctl call asks the Video Device to return the current status of
the device.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-play.rst
View file @ 586027ce
......@@ -2,27 +2,23 @@
.. _VIDEO_PLAY:
==========
VIDEO_PLAY
==========
Description
-----------
This ioctl is for DVB devices only. To control a V4L2 decoder use the
V4L2 :ref:`VIDIOC_DECODER_CMD` instead.
NAME
----
This ioctl call asks the Video Device to start playing a video stream
from the selected source.
VIDEO_PLAY
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_PLAY)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -42,11 +38,19 @@ Arguments
- Equals VIDEO_PLAY for this command.
Return Value
DESCRIPTION
-----------
This ioctl is for DVB devices only. To control a V4L2 decoder use the
V4L2 :ref:`VIDIOC_DECODER_CMD` instead.
This ioctl call asks the Video Device to start playing a video stream
from the selected source.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-select-source.rst
View file @ 586027ce
......@@ -2,29 +2,23 @@
.. _VIDEO_SELECT_SOURCE:
===================
VIDEO_SELECT_SOURCE
===================
Description
-----------
This ioctl is for DVB devices only. This ioctl was also supported by the
V4L2 ivtv driver, but that has been replaced by the ivtv-specific
``IVTV_IOC_PASSTHROUGH_MODE`` ioctl.
NAME
----
This ioctl call informs the video device which source shall be used for
the input data. The possible sources are demux or memory. If memory is
selected, the data is fed to the video device through the write command.
VIDEO_SELECT_SOURCE
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_SELECT_SOURCE, video_stream_source_t source)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -50,11 +44,21 @@ Arguments
- Indicates which source shall be used for the Video stream.
Return Value
DESCRIPTION
-----------
This ioctl is for DVB devices only. This ioctl was also supported by the
V4L2 ivtv driver, but that has been replaced by the ivtv-specific
``IVTV_IOC_PASSTHROUGH_MODE`` ioctl.
This ioctl call informs the video device which source shall be used for
the input data. The possible sources are demux or memory. If memory is
selected, the data is fed to the video device through the write command.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-set-attributes.rst
View file @ 586027ce
......@@ -2,26 +2,23 @@
.. _VIDEO_SET_ATTRIBUTES:
====================
VIDEO_SET_ATTRIBUTES
====================
Description
-----------
NAME
----
This ioctl is intended for DVD playback and allows you to set certain
information about the stream. Some hardware may not need this
information, but the call also tells the hardware to prepare for DVD
playback.
VIDEO_SET_ATTRIBUTES
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_SET_ATTRIBUTE ,video_attributes_t vattr)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -47,7 +44,16 @@ Arguments
- video attributes according to section ??.
Return Value
DESCRIPTION
-----------
This ioctl is intended for DVD playback and allows you to set certain
information about the stream. Some hardware may not need this
information, but the call also tells the hardware to prepare for DVD
playback.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/dvb/video-set-blank.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _VIDEO_SET_BLANK:
===============
VIDEO_SET_BLANK
===============
Description
-----------
NAME
----
This ioctl call asks the Video Device to blank out the picture.
VIDEO_SET_BLANK
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_SET_BLANK, boolean mode)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -49,11 +49,15 @@ Arguments
- FALSE: Show last decoded frame.
Return Value
DESCRIPTION
-----------
This ioctl call asks the Video Device to blank out the picture.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-set-display-format.rst
View file @ 586027ce
......@@ -2,24 +2,23 @@
.. _VIDEO_SET_DISPLAY_FORMAT:
========================
VIDEO_SET_DISPLAY_FORMAT
========================
Description
-----------
NAME
----
This ioctl call asks the Video Device to select the video format to be
applied by the MPEG chip on the video.
VIDEO_SET_DISPLAY_FORMAT
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_SET_DISPLAY_FORMAT, video_display_format_t format)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -45,11 +44,16 @@ Arguments
- Selects the video format to be used.
Return Value
DESCRIPTION
-----------
This ioctl call asks the Video Device to select the video format to be
applied by the MPEG chip on the video.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-set-format.rst
View file @ 586027ce
......@@ -2,25 +2,23 @@
.. _VIDEO_SET_FORMAT:
================
VIDEO_SET_FORMAT
================
Description
-----------
NAME
----
This ioctl sets the screen format (aspect ratio) of the connected output
device (TV) so that the output of the decoder can be adjusted
accordingly.
VIDEO_SET_FORMAT
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_SET_FORMAT, video_format_t format)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -46,7 +44,15 @@ Arguments
- video format of TV as defined in section ??.
Return Value
DESCRIPTION
-----------
This ioctl sets the screen format (aspect ratio) of the connected output
device (TV) so that the output of the decoder can be adjusted
accordingly.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......@@ -65,6 +71,3 @@ appropriately. The generic error codes are described at the
- ``EINVAL``
- format is not a valid video format.
Documentation/linux_tv/media/dvb/video-set-highlight.rst
View file @ 586027ce
......@@ -2,24 +2,23 @@
.. _VIDEO_SET_HIGHLIGHT:
===================
VIDEO_SET_HIGHLIGHT
===================
Description
-----------
NAME
----
This ioctl sets the SPU highlight information for the menu access of a
DVD.
VIDEO_SET_HIGHLIGHT
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_SET_HIGHLIGHT ,video_highlight_t *vhilite)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -45,11 +44,16 @@ Arguments
- SPU Highlight information according to section ??.
Return Value
DESCRIPTION
-----------
This ioctl sets the SPU highlight information for the menu access of a
DVD.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-set-id.rst
View file @ 586027ce
......@@ -2,24 +2,23 @@
.. _VIDEO_SET_ID:
============
VIDEO_SET_ID
============
Description
-----------
NAME
----
This ioctl selects which sub-stream is to be decoded if a program or
system stream is sent to the video device.
VIDEO_SET_ID
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = VIDEO_SET_ID, int id)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -45,7 +44,14 @@ Arguments
- video sub-stream id
Return Value
DESCRIPTION
-----------
This ioctl selects which sub-stream is to be decoded if a program or
system stream is sent to the video device.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......@@ -64,6 +70,3 @@ appropriately. The generic error codes are described at the
- ``EINVAL``
- Invalid sub-stream id.
Documentation/linux_tv/media/dvb/video-set-spu-palette.rst
View file @ 586027ce
......@@ -2,23 +2,23 @@
.. _VIDEO_SET_SPU_PALETTE:
=====================
VIDEO_SET_SPU_PALETTE
=====================
Description
-----------
NAME
----
This ioctl sets the SPU color palette.
VIDEO_SET_SPU_PALETTE
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_SET_SPU_PALETTE, video_spu_palette_t *palette )
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -44,7 +44,13 @@ Arguments
- SPU palette according to section ??.
Return Value
DESCRIPTION
-----------
This ioctl sets the SPU color palette.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......@@ -63,6 +69,3 @@ appropriately. The generic error codes are described at the
- ``EINVAL``
- input is not a valid palette or driver doesn’t handle SPU.
Documentation/linux_tv/media/dvb/video-set-spu.rst
View file @ 586027ce
......@@ -2,24 +2,23 @@
.. _VIDEO_SET_SPU:
=============
VIDEO_SET_SPU
=============
Description
-----------
NAME
----
This ioctl activates or deactivates SPU decoding in a DVD input stream.
It can only be used, if the driver is able to handle a DVD stream.
VIDEO_SET_SPU
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_SET_SPU , video_spu_t *spu)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -46,7 +45,14 @@ Arguments
??.
Return Value
DESCRIPTION
-----------
This ioctl activates or deactivates SPU decoding in a DVD input stream.
It can only be used, if the driver is able to handle a DVD stream.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......@@ -65,6 +71,3 @@ appropriately. The generic error codes are described at the
- ``EINVAL``
- input is not a valid spu setting or driver cannot handle SPU.
Documentation/linux_tv/media/dvb/video-set-streamtype.rst
View file @ 586027ce
......@@ -2,25 +2,23 @@
.. _VIDEO_SET_STREAMTYPE:
====================
VIDEO_SET_STREAMTYPE
====================
Description
-----------
NAME
----
This ioctl tells the driver which kind of stream to expect being written
to it. If this call is not used the default of video PES is used. Some
drivers might not support this call and always expect PES.
VIDEO_SET_STREAMTYPE
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_SET_STREAMTYPE, int type)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -46,11 +44,17 @@ Arguments
- stream type
Return Value
DESCRIPTION
-----------
This ioctl tells the driver which kind of stream to expect being written
to it. If this call is not used the default of video PES is used. Some
drivers might not support this call and always expect PES.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-set-system.rst
View file @ 586027ce
......@@ -2,26 +2,23 @@
.. _VIDEO_SET_SYSTEM:
================
VIDEO_SET_SYSTEM
================
Description
-----------
NAME
----
This ioctl sets the television output format. The format (see section
??) may vary from the color format of the displayed MPEG stream. If the
hardware is not able to display the requested format the call will
return an error.
VIDEO_SET_SYSTEM
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_SET_SYSTEM , video_system_t system)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -47,7 +44,16 @@ Arguments
- video system of TV output.
Return Value
DESCRIPTION
-----------
This ioctl sets the television output format. The format (see section
??) may vary from the color format of the displayed MPEG stream. If the
hardware is not able to display the requested format the call will
return an error.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......@@ -66,6 +72,3 @@ appropriately. The generic error codes are described at the
- ``EINVAL``
- system is not a valid or supported video system.
Documentation/linux_tv/media/dvb/video-slowmotion.rst
View file @ 586027ce
......@@ -2,25 +2,23 @@
.. _VIDEO_SLOWMOTION:
================
VIDEO_SLOWMOTION
================
Description
-----------
NAME
----
This ioctl call asks the video device to repeat decoding frames N number
of times. This call can only be used if VIDEO_SOURCE_MEMORY is
selected.
VIDEO_SLOWMOTION
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_SLOWMOTION, int nFrames)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -46,7 +44,15 @@ Arguments
- The number of times to repeat each frame.
Return Value
DESCRIPTION
-----------
This ioctl call asks the video device to repeat decoding frames N number
of times. This call can only be used if VIDEO_SOURCE_MEMORY is
selected.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
......@@ -65,6 +71,3 @@ appropriately. The generic error codes are described at the
- ``EPERM``
- Mode VIDEO_SOURCE_MEMORY not selected.
Documentation/linux_tv/media/dvb/video-stillpicture.rst
View file @ 586027ce
......@@ -2,25 +2,23 @@
.. _VIDEO_STILLPICTURE:
==================
VIDEO_STILLPICTURE
==================
Description
-----------
NAME
----
This ioctl call asks the Video Device to display a still picture
(I-frame). The input data shall contain an I-frame. If the pointer is
NULL, then the current displayed still picture is blanked.
VIDEO_STILLPICTURE
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_STILLPICTURE, struct video_still_picture *sp)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -46,11 +44,17 @@ Arguments
- Pointer to a location where an I-frame and size is stored.
Return Value
DESCRIPTION
-----------
This ioctl call asks the Video Device to display a still picture
(I-frame). The input data shall contain an I-frame. If the pointer is
NULL, then the current displayed still picture is blanked.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-stop.rst
View file @ 586027ce
......@@ -2,28 +2,23 @@
.. _VIDEO_STOP:
==========
VIDEO_STOP
==========
Description
-----------
This ioctl is for DVB devices only. To control a V4L2 decoder use the
V4L2 :ref:`VIDIOC_DECODER_CMD` instead.
NAME
----
This ioctl call asks the Video Device to stop playing the current
stream. Depending on the input parameter, the screen can be blanked out
or displaying the last decoded frame.
VIDEO_STOP
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(fd, int request = VIDEO_STOP, boolean mode)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -59,11 +54,20 @@ Arguments
- FALSE: Show last decoded frame.
Return Value
DESCRIPTION
-----------
This ioctl is for DVB devices only. To control a V4L2 decoder use the
V4L2 :ref:`VIDIOC_DECODER_CMD` instead.
This ioctl call asks the Video Device to stop playing the current
stream. Depending on the input parameter, the screen can be blanked out
or displaying the last decoded frame.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/dvb/video-try-command.rst
View file @ 586027ce
......@@ -2,30 +2,23 @@
.. _VIDEO_TRY_COMMAND:
=================
VIDEO_TRY_COMMAND
=================
Description
-----------
NAME
----
This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
this ioctl has been replaced by the
:ref:`VIDIOC_TRY_DECODER_CMD <VIDIOC_DECODER_CMD>` ioctl.
This ioctl tries a decoder command. The ``video_command`` struct is a
subset of the ``v4l2_decoder_cmd`` struct, so refer to the
:ref:`VIDIOC_TRY_DECODER_CMD <VIDIOC_DECODER_CMD>` documentation
for more information.
VIDEO_TRY_COMMAND
Synopsis
SYNOPSIS
--------
.. c:function:: int ioctl(int fd, int request = VIDEO_TRY_COMMAND, struct video_command *cmd)
Arguments
----------
ARGUMENTS
---------
.. flat-table::
:header-rows: 0
......@@ -51,11 +44,22 @@ Arguments
- Try a decoder command.
Return Value
DESCRIPTION
-----------
This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
this ioctl has been replaced by the
:ref:`VIDIOC_TRY_DECODER_CMD <VIDIOC_DECODER_CMD>` ioctl.
This ioctl tries a decoder command. The ``video_command`` struct is a
subset of the ``v4l2_decoder_cmd`` struct, so refer to the
:ref:`VIDIOC_TRY_DECODER_CMD <VIDIOC_DECODER_CMD>` documentation
for more information.
RETURN VALUE
------------
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/linux_tv/media/mediactl/media-func-close.rst
View file @ 586027ce
......@@ -6,12 +6,12 @@
media close()
*************
*man media-close(2)*
NAME
====
Close a media device
media-close - Close a media device
Synopsis
SYNOPSIS
========
.. code-block:: c
......@@ -21,21 +21,22 @@ Synopsis
.. cpp:function:: int close( int fd )
Arguments
ARGUMENTS
=========
``fd``
File descriptor returned by :ref:`open() <func-open>`.
Description
DESCRIPTION
===========
Closes the media device. Resources associated with the file descriptor
are freed. The device configuration remain unchanged.
Return Value
RETURN VALUE
============
:ref:`close() <func-close>` returns 0 on success. On error, -1 is returned, and
......
Documentation/linux_tv/media/mediactl/media-func-ioctl.rst
View file @ 586027ce
......@@ -6,12 +6,12 @@
media ioctl()
*************
*man media-ioctl(2)*
NAME
====
Control a media device
media-ioctl - Control a media device
Synopsis
SYNOPSIS
========
.. code-block:: c
......@@ -21,7 +21,8 @@ Synopsis
.. cpp:function:: int ioctl( int fd, int request, void *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -35,7 +36,7 @@ Arguments
Pointer to a request-specific structure.
Description
DESCRIPTION
===========
The :ref:`ioctl() <func-ioctl>` function manipulates media device parameters.
......@@ -51,7 +52,7 @@ requests, their respective function and parameters are specified in
:ref:`media-user-func`.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/mediactl/media-func-open.rst
View file @ 586027ce
......@@ -6,12 +6,12 @@
media open()
************
*man media-open(2)*
NAME
====
Open a media device
media-open - Open a media device
Synopsis
SYNOPSIS
========
.. code-block:: c
......@@ -21,7 +21,8 @@ Synopsis
.. cpp:function:: int open( const char *device_name, int flags )
Arguments
ARGUMENTS
=========
``device_name``
......@@ -32,7 +33,7 @@ Arguments
Other flags have no effect.
Description
DESCRIPTION
===========
To open a media device applications call :ref:`open() <func-open>` with the
......@@ -44,7 +45,7 @@ configuration will result in an error, and ``errno`` will be set to
EBADF.
Return Value
RETURN VALUE
============
:ref:`open() <func-open>` returns the new file descriptor on success. On error,
......
Documentation/linux_tv/media/mediactl/media-ioc-device-info.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl MEDIA_IOC_DEVICE_INFO
***************************
*man MEDIA_IOC_DEVICE_INFO(2)*
NAME
====
Query device information
MEDIA_IOC_DEVICE_INFO - Query device information
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct media_device_info *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
All media devices must support the ``MEDIA_IOC_DEVICE_INFO`` ioctl. To
......@@ -132,7 +133,7 @@ used instead. The ``bus_info`` field is guaranteed to be unique, but can
vary across reboots or device unplug/replug.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/mediactl/media-ioc-enum-entities.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl MEDIA_IOC_ENUM_ENTITIES
*****************************
*man MEDIA_IOC_ENUM_ENTITIES(2)*
NAME
====
Enumerate entities and their properties
MEDIA_IOC_ENUM_ENTITIES - Enumerate entities and their properties
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct media_entity_desc *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To query the attributes of an entity, applications set the id field of a
......@@ -182,8 +183,7 @@ id's until they get an error.
-
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/mediactl/media-ioc-enum-links.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl MEDIA_IOC_ENUM_LINKS
**************************
*man MEDIA_IOC_ENUM_LINKS(2)*
NAME
====
Enumerate all pads and links for a given entity
MEDIA_IOC_ENUM_LINKS - Enumerate all pads and links for a given entity
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct media_links_enum *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To enumerate pads and/or links for a given entity, applications set the
......@@ -158,8 +159,7 @@ returned during the enumeration process.
- Link flags, see :ref:`media-link-flag` for more details.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/mediactl/media-ioc-g-topology.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl MEDIA_IOC_G_TOPOLOGY
**************************
*man MEDIA_IOC_G_TOPOLOGY(2)*
NAME
====
Enumerate the graph topology and graph element properties
MEDIA_IOC_G_TOPOLOGY - Enumerate the graph topology and graph element properties
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct media_v2_topology *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
The typical usage of this ioctl is to call it twice. On the first call,
......@@ -409,8 +410,7 @@ desired arrays with the media graph elements.
this array to zero.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/mediactl/media-ioc-setup-link.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl MEDIA_IOC_SETUP_LINK
**************************
*man MEDIA_IOC_SETUP_LINK(2)*
NAME
====
Modify the properties of a link
MEDIA_IOC_SETUP_LINK - Modify the properties of a link
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct media_link_desc *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To change link properties applications fill a struct
......@@ -53,7 +54,7 @@ If the specified link can't be found the driver returns with an ``EINVAL``
error code.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/func-close.rst
View file @ 586027ce
......@@ -6,12 +6,12 @@
V4L2 close()
************
*man v4l2-close(2)*
NAME
====
Close a V4L2 device
v4l2-close - Close a V4L2 device
Synopsis
SYNOPSIS
========
.. code-block:: c
......@@ -21,14 +21,15 @@ Synopsis
.. cpp:function:: int close( int fd )
Arguments
ARGUMENTS
=========
``fd``
File descriptor returned by :ref:`open() <func-open>`.
Description
DESCRIPTION
===========
Closes the device. Any I/O in progress is terminated and resources
......@@ -37,7 +38,7 @@ parameters, current input or output, control values or other properties
remain unchanged.
Return Value
RETURN VALUE
============
The function returns 0 on success, -1 on failure and the ``errno`` is
......
Documentation/linux_tv/media/v4l/func-ioctl.rst
View file @ 586027ce
......@@ -6,12 +6,12 @@
V4L2 ioctl()
************
*man v4l2-ioctl(2)*
NAME
====
Program a V4L2 device
v4l2-ioctl - Program a V4L2 device
Synopsis
SYNOPSIS
========
.. code-block:: c
......@@ -21,7 +21,8 @@ Synopsis
.. cpp:function:: int ioctl( int fd, int request, void *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -35,7 +36,7 @@ Arguments
Pointer to a function parameter, usually a structure.
Description
DESCRIPTION
===========
The :ref:`ioctl() <func-ioctl>` function is used to program V4L2 devices. The
......@@ -49,7 +50,7 @@ All V4L2 ioctl requests, their respective function and parameters are
specified in :ref:`user-func`.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/func-mmap.rst
View file @ 586027ce
......@@ -6,12 +6,12 @@
V4L2 mmap()
***********
*man v4l2-mmap(2)*
NAME
====
Map device memory into application address space
v4l2-mmap - Map device memory into application address space
Synopsis
SYNOPSIS
========
.. code-block:: c
......@@ -22,7 +22,8 @@ Synopsis
.. cpp:function:: void *mmap( void *start, size_t length, int prot, int flags, int fd, off_t offset )
Arguments
ARGUMENTS
=========
``start``
......@@ -89,7 +90,7 @@ Arguments
``mem_offset`` field for the multi-planar API.
Description
DESCRIPTION
===========
The :ref:`mmap() <func-mmap>` function asks to map ``length`` bytes starting at
......@@ -105,7 +106,7 @@ before they can be queried.
To unmap buffers the :ref:`munmap() <func-munmap>` function is used.
Return Value
RETURN VALUE
============
On success :ref:`mmap() <func-mmap>` returns a pointer to the mapped buffer. On
......
Documentation/linux_tv/media/v4l/func-munmap.rst
View file @ 586027ce
......@@ -6,12 +6,12 @@
V4L2 munmap()
*************
*man v4l2-munmap(2)*
NAME
====
Unmap device memory
v4l2-munmap - Unmap device memory
Synopsis
SYNOPSIS
========
.. code-block:: c
......@@ -22,7 +22,8 @@ Synopsis
.. cpp:function:: int munmap( void *start, size_t length )
Arguments
ARGUMENTS
=========
``start``
......@@ -38,14 +39,14 @@ Arguments
multi-planar API.
Description
DESCRIPTION
===========
Unmaps a previously with the :ref:`mmap() <func-mmap>` function mapped
buffer and frees it, if possible.
Return Value
RETURN VALUE
============
On success :ref:`munmap() <func-munmap>` returns 0, on failure -1 and the
......
Documentation/linux_tv/media/v4l/func-open.rst
View file @ 586027ce
......@@ -6,12 +6,12 @@
V4L2 open()
***********
*man v4l2-open(2)*
NAME
====
Open a V4L2 device
v4l2-open - Open a V4L2 device
Synopsis
SYNOPSIS
========
.. code-block:: c
......@@ -21,7 +21,8 @@ Synopsis
.. cpp:function:: int open( const char *device_name, int flags )
Arguments
ARGUMENTS
=========
``device_name``
......@@ -42,7 +43,7 @@ Arguments
Other flags have no effect.
Description
DESCRIPTION
===========
To open a V4L2 device applications call :ref:`open() <func-open>` with the
......@@ -53,7 +54,7 @@ driver they will be reset to default values, drivers are never in an
undefined state.
Return Value
RETURN VALUE
============
On success :ref:`open() <func-open>` returns the new file descriptor. On error
......
Documentation/linux_tv/media/v4l/func-poll.rst
View file @ 586027ce
......@@ -6,12 +6,12 @@
V4L2 poll()
***********
*man v4l2-poll(2)*
NAME
====
Wait for some event on a file descriptor
v4l2-poll - Wait for some event on a file descriptor
Synopsis
SYNOPSIS
========
.. code-block:: c
......@@ -21,7 +21,13 @@ Synopsis
.. cpp:function:: int poll( struct pollfd *ufds, unsigned int nfds, int timeout )
Description
ARGUMENTS
=========
DESCRIPTION
===========
With the :ref:`poll() <func-poll>` function applications can suspend execution
......@@ -84,7 +90,7 @@ function.
For more details see the :ref:`poll() <func-poll>` manual page.
Return Value
RETURN VALUE
============
On success, :ref:`poll() <func-poll>` returns the number structures which have
......
Documentation/linux_tv/media/v4l/func-read.rst
View file @ 586027ce
......@@ -6,12 +6,12 @@
V4L2 read()
***********
*man v4l2-read(2)*
NAME
====
Read from a V4L2 device
v4l2-read - Read from a V4L2 device
Synopsis
SYNOPSIS
========
.. code-block:: c
......@@ -21,7 +21,8 @@ Synopsis
.. cpp:function:: ssize_t read( int fd, void *buf, size_t count )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +32,7 @@ Arguments
``count``
Description
DESCRIPTION
===========
:ref:`read() <func-read>` attempts to read up to ``count`` bytes from file
......@@ -91,7 +92,7 @@ however. The discarding policy is not reported and cannot be changed.
For minimum requirements see :ref:`devices`.
Return Value
RETURN VALUE
============
On success, the number of bytes read is returned. It is not an error if
......
Documentation/linux_tv/media/v4l/func-select.rst
View file @ 586027ce
......@@ -6,12 +6,12 @@
V4L2 select()
*************
*man v4l2-select(2)*
NAME
====
Synchronous I/O multiplexing
v4l2-select - Synchronous I/O multiplexing
Synopsis
SYNOPSIS
========
.. code-block:: c
......@@ -23,7 +23,13 @@ Synopsis
.. cpp:function:: int select( int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout )
Description
ARGUMENTS
=========
DESCRIPTION
===========
With the :ref:`select() <func-select>` function applications can suspend
......@@ -65,7 +71,7 @@ function.
For more details see the :ref:`select() <func-select>` manual page.
Return Value
RETURN VALUE
============
On success, :ref:`select() <func-select>` returns the number of descriptors
......
Documentation/linux_tv/media/v4l/func-write.rst
View file @ 586027ce
......@@ -6,12 +6,12 @@
V4L2 write()
************
*man v4l2-write(2)*
NAME
====
Write to a V4L2 device
v4l2-write - Write to a V4L2 device
Synopsis
SYNOPSIS
========
.. code-block:: c
......@@ -21,7 +21,8 @@ Synopsis
.. cpp:function:: ssize_t write( int fd, void *buf, size_t count )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +32,7 @@ Arguments
``count``
Description
DESCRIPTION
===========
:ref:`write() <func-write>` writes up to ``count`` bytes to the device
......@@ -46,7 +47,7 @@ Sliced Teletext or Closed Caption data is not repeated, the driver
inserts a blank line instead.
Return Value
RETURN VALUE
============
On success, the number of bytes written are returned. Zero indicates
......
Documentation/linux_tv/media/v4l/vidioc-create-bufs.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_CREATE_BUFS
************************
*man VIDIOC_CREATE_BUFS(2)*
NAME
====
Create buffers for Memory Mapped or User Pointer or DMA Buffer I/O
VIDIOC_CREATE_BUFS - Create buffers for Memory Mapped or User Pointer or DMA Buffer I/O
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_create_buffers *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
This ioctl is used to create buffers for :ref:`memory mapped <mmap>`
......@@ -129,8 +130,7 @@ than the number requested.
must set the array to zero.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-cropcap.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_CROPCAP
********************
*man VIDIOC_CROPCAP(2)*
NAME
====
Information about the video cropping and scaling abilities
VIDIOC_CROPCAP - Information about the video cropping and scaling abilities
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_cropcap *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
Applications use this function to query the cropping limits, the pixel
......@@ -153,8 +154,7 @@ overlay devices.
- Height of the rectangle, in pixels.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-dbg-g-chip-info.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_DBG_G_CHIP_INFO
****************************
*man VIDIOC_DBG_G_CHIP_INFO(2)*
NAME
====
Identify the chips on a TV card
VIDIOC_DBG_G_CHIP_INFO - Identify the chips on a TV card
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_dbg_chip_info *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
**Note**
......@@ -191,8 +192,7 @@ instructions.
- Match the nth sub-device.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-dbg-g-register.rst
View file @ 586027ce
......@@ -6,20 +6,20 @@
ioctl VIDIOC_DBG_G_REGISTER, VIDIOC_DBG_S_REGISTER
**************************************************
*man VIDIOC_DBG_G_REGISTER(2)*
NAME
====
VIDIOC_DBG_S_REGISTER
Read or write hardware registers
VIDIOC_DBG_G_REGISTER - VIDIOC_DBG_S_REGISTER - Read or write hardware registers
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_dbg_register *argp )
.. cpp:function:: int ioctl( int fd, int request, const struct v4l2_dbg_register *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +31,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
**Note**
......@@ -196,8 +196,7 @@ instructions.
- Match the nth sub-device.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-decoder-cmd.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl VIDIOC_DECODER_CMD, VIDIOC_TRY_DECODER_CMD
************************************************
*man VIDIOC_DECODER_CMD(2)*
NAME
====
VIDIOC_TRY_DECODER_CMD
Execute an decoder command
VIDIOC_DECODER_CMD - VIDIOC_TRY_DECODER_CMD - Execute an decoder command
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_decoder_cmd *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
These ioctls control an audio/video (usually MPEG-) decoder.
......@@ -255,8 +255,7 @@ introduced in Linux 3.3.
flags are defined for this command.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-dqevent.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_DQEVENT
********************
*man VIDIOC_DQEVENT(2)*
NAME
====
Dequeue event
VIDIOC_DQEVENT - Dequeue event
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_event *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
Dequeue an event from a video device. No input is required for this
......@@ -563,8 +564,7 @@ call.
decoder.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-dv-timings-cap.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl VIDIOC_DV_TIMINGS_CAP, VIDIOC_SUBDEV_DV_TIMINGS_CAP
*********************************************************
*man VIDIOC_DV_TIMINGS_CAP(2)*
NAME
====
VIDIOC_SUBDEV_DV_TIMINGS_CAP
The capabilities of the Digital Video receiver/transmitter
VIDIOC_DV_TIMINGS_CAP - VIDIOC_SUBDEV_DV_TIMINGS_CAP - The capabilities of the Digital Video receiver/transmitter
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_dv_timings_cap *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To query the capabilities of the DV receiver/transmitter applications
......@@ -241,8 +241,7 @@ that doesn't support them will return an ``EINVAL`` error code.
the standards set in the ``standards`` field.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-encoder-cmd.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl VIDIOC_ENCODER_CMD, VIDIOC_TRY_ENCODER_CMD
************************************************
*man VIDIOC_ENCODER_CMD(2)*
NAME
====
VIDIOC_TRY_ENCODER_CMD
Execute an encoder command
VIDIOC_ENCODER_CMD - VIDIOC_TRY_ENCODER_CMD - Execute an encoder command
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_encoder_cmd *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
These ioctls control an audio/video (usually MPEG-) encoder.
......@@ -179,8 +179,7 @@ introduced in Linux 2.6.21.
rather than immediately.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-enum-dv-timings.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl VIDIOC_ENUM_DV_TIMINGS, VIDIOC_SUBDEV_ENUM_DV_TIMINGS
***********************************************************
*man VIDIOC_ENUM_DV_TIMINGS(2)*
NAME
====
VIDIOC_SUBDEV_ENUM_DV_TIMINGS
Enumerate supported Digital Video timings
VIDIOC_ENUM_DV_TIMINGS - VIDIOC_SUBDEV_ENUM_DV_TIMINGS - Enumerate supported Digital Video timings
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_enum_dv_timings *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
While some DV receivers or transmitters support a wide range of timings,
......@@ -103,8 +103,7 @@ return an ``EINVAL`` error code.
- The timings.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-enum-fmt.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_ENUM_FMT
*********************
*man VIDIOC_ENUM_FMT(2)*
NAME
====
Enumerate image formats
VIDIOC_ENUM_FMT - Enumerate image formats
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_fmtdesc *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To enumerate image formats applications initialize the ``type`` and
......@@ -150,8 +151,7 @@ formats may be different.
format instead for better performance.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-enum-frameintervals.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_ENUM_FRAMEINTERVALS
********************************
*man VIDIOC_ENUM_FRAMEINTERVALS(2)*
NAME
====
Enumerate frame intervals
VIDIOC_ENUM_FRAMEINTERVALS - Enumerate frame intervals
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_frmivalenum *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +32,7 @@ Arguments
interval.
Description
DESCRIPTION
===========
This ioctl allows applications to enumerate all frame intervals that the
......@@ -264,8 +265,7 @@ Enums
- Step-wise defined frame interval.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-enum-framesizes.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_ENUM_FRAMESIZES
****************************
*man VIDIOC_ENUM_FRAMESIZES(2)*
NAME
====
Enumerate frame sizes
VIDIOC_ENUM_FRAMESIZES - Enumerate frame sizes
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_frmsizeenum *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +32,7 @@ Arguments
and height.
Description
DESCRIPTION
===========
This ioctl allows applications to enumerate all frame sizes (i. e. width
......@@ -281,8 +282,7 @@ Enums
- Step-wise defined frame size.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-enum-freq-bands.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_ENUM_FREQ_BANDS
****************************
*man VIDIOC_ENUM_FREQ_BANDS(2)*
NAME
====
Enumerate supported frequency bands
VIDIOC_ENUM_FREQ_BANDS - Enumerate supported frequency bands
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_frequency_band *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
Enumerates the frequency bands that a tuner or modulator supports. To do
......@@ -176,8 +177,7 @@ of the corresponding tuner/modulator is set.
- Amplitude Modulation, commonly used for analog radio.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-enumaudio.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_ENUMAUDIO
**********************
*man VIDIOC_ENUMAUDIO(2)*
NAME
====
Enumerate audio inputs
VIDIOC_ENUMAUDIO - Enumerate audio inputs
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_audio *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To query the attributes of an audio input applications initialize the
......@@ -43,7 +44,7 @@ See :ref:`VIDIOC_G_AUDIO <VIDIOC_G_AUDIO>` for a description of struct
:ref:`v4l2_audio <v4l2-audio>`.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-enumaudioout.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_ENUMAUDOUT
***********************
*man VIDIOC_ENUMAUDOUT(2)*
NAME
====
Enumerate audio outputs
VIDIOC_ENUMAUDOUT - Enumerate audio outputs
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_audioout *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To query the attributes of an audio output applications initialize the
......@@ -46,7 +47,7 @@ See :ref:`VIDIOC_G_AUDIOout <VIDIOC_G_AUDIOout>` for a description of struct
:ref:`v4l2_audioout <v4l2-audioout>`.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-enuminput.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_ENUMINPUT
**********************
*man VIDIOC_ENUMINPUT(2)*
NAME
====
Enumerate video inputs
VIDIOC_ENUMINPUT - Enumerate video inputs
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_input *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To query the attributes of a video input applications initialize the
......@@ -353,8 +354,7 @@ at index zero, incrementing by one until the driver returns ``EINVAL``.
:ref:`v4l2-selections-common`.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-enumoutput.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_ENUMOUTPUT
***********************
*man VIDIOC_ENUMOUTPUT(2)*
NAME
====
Enumerate video outputs
VIDIOC_ENUMOUTPUT - Enumerate video outputs
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_output *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To query the attributes of a video outputs applications initialize the
......@@ -208,8 +209,7 @@ EINVAL.
:ref:`v4l2-selections-common`.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-enumstd.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_ENUMSTD
********************
*man VIDIOC_ENUMSTD(2)*
NAME
====
Enumerate supported video standards
VIDIOC_ENUMSTD - Enumerate supported video standards
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_standard *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To query the attributes of a video standard, especially a custom (driver
......@@ -384,8 +385,7 @@ support digital TV. See also the Linux DVB API at
- + 6.5 [8]_
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-expbuf.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_EXPBUF
*******************
*man VIDIOC_EXPBUF(2)*
NAME
====
Export a buffer as a DMABUF file descriptor.
VIDIOC_EXPBUF - Export a buffer as a DMABUF file descriptor.
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_exportbuffer *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
This ioctl is an extension to the :ref:`memory mapping <mmap>` I/O
......@@ -183,8 +184,7 @@ Examples
the array to zero.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-audio.rst
View file @ 586027ce
......@@ -6,20 +6,20 @@
ioctl VIDIOC_G_AUDIO, VIDIOC_S_AUDIO
************************************
*man VIDIOC_G_AUDIO(2)*
NAME
====
VIDIOC_S_AUDIO
Query or select the current audio input and its attributes
VIDIOC_G_AUDIO - VIDIOC_S_AUDIO - Query or select the current audio input and its attributes
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_audio *argp )
.. cpp:function:: int ioctl( int fd, int request, const struct v4l2_audio *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +31,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To query the current audio input applications zero out the ``reserved``
......@@ -149,8 +149,7 @@ return the actual new audio mode.
- AVL mode is on.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-audioout.rst
View file @ 586027ce
......@@ -6,20 +6,20 @@
ioctl VIDIOC_G_AUDOUT, VIDIOC_S_AUDOUT
**************************************
*man VIDIOC_G_AUDOUT(2)*
NAME
====
VIDIOC_S_AUDOUT
Query or select the current audio output
VIDIOC_G_AUDOUT - VIDIOC_S_AUDOUT - Query or select the current audio output
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_audioout *argp )
.. cpp:function:: int ioctl( int fd, int request, const struct v4l2_audioout *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +31,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To query the current audio output applications zero out the ``reserved``
......@@ -108,8 +108,7 @@ sound card are not audio outputs in this sense.
the array to zero.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-crop.rst
View file @ 586027ce
......@@ -6,20 +6,20 @@
ioctl VIDIOC_G_CROP, VIDIOC_S_CROP
**********************************
*man VIDIOC_G_CROP(2)*
NAME
====
VIDIOC_S_CROP
Get or set the current cropping rectangle
VIDIOC_G_CROP - VIDIOC_S_CROP - Get or set the current cropping rectangle
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_crop *argp )
.. cpp:function:: int ioctl( int fd, int request, const struct v4l2_crop *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +31,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To query the cropping rectangle size and position applications set the
......@@ -104,8 +104,7 @@ When cropping is not supported then no parameters are changed and
:ref:`v4l2_cropcap <v4l2-cropcap>` ``bounds`` is used.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-ctrl.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl VIDIOC_G_CTRL, VIDIOC_S_CTRL
**********************************
*man VIDIOC_G_CTRL(2)*
NAME
====
VIDIOC_S_CTRL
Get or set the value of a control
VIDIOC_G_CTRL - VIDIOC_S_CTRL - Get or set the value of a control
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_control *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To get the current value of a control applications initialize the ``id``
......@@ -78,8 +78,7 @@ These ioctls work only with user controls. For other control classes the
- New value or current value.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-dv-timings.rst
View file @ 586027ce
......@@ -6,20 +6,18 @@
ioctl VIDIOC_G_DV_TIMINGS, VIDIOC_S_DV_TIMINGS
**********************************************
*man VIDIOC_G_DV_TIMINGS(2)*
NAME
====
VIDIOC_S_DV_TIMINGS
VIDIOC_SUBDEV_G_DV_TIMINGS
VIDIOC_SUBDEV_S_DV_TIMINGS
Get or set DV timings for input or output
VIDIOC_G_DV_TIMINGS - VIDIOC_S_DV_TIMINGS - VIDIOC_SUBDEV_G_DV_TIMINGS - VIDIOC_SUBDEV_S_DV_TIMINGS - Get or set DV timings for input or output
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_dv_timings *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -32,7 +30,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To set DV timings for the input or output, applications use the
......@@ -51,7 +49,7 @@ the current input or output does not support DV timings (e.g. if
``V4L2_IN_CAP_DV_TIMINGS`` flag), then ``ENODATA`` error code is returned.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-edid.rst
View file @ 586027ce
......@@ -6,20 +6,18 @@
ioctl VIDIOC_G_EDID, VIDIOC_S_EDID, VIDIOC_SUBDEV_G_EDID, VIDIOC_SUBDEV_S_EDID
******************************************************************************
*man VIDIOC_G_EDID(2)*
NAME
====
VIDIOC_S_EDID
VIDIOC_SUBDEV_G_EDID
VIDIOC_SUBDEV_S_EDID
Get or set the EDID of a video receiver/transmitter
VIDIOC_G_EDID - VIDIOC_S_EDID - VIDIOC_SUBDEV_G_EDID - VIDIOC_SUBDEV_S_EDID - Get or set the EDID of a video receiver/transmitter
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_edid *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -32,7 +30,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
These ioctls can be used to get or set an EDID associated with an input
......@@ -145,8 +143,7 @@ EDID is no longer available.
``blocks`` * 128.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-enc-index.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_G_ENC_INDEX
************************
*man VIDIOC_G_ENC_INDEX(2)*
NAME
====
Get meta data about a compressed video stream
VIDIOC_G_ENC_INDEX - Get meta data about a compressed video stream
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_enc_idx *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
The :ref:`VIDIOC_G_ENC_INDEX <VIDIOC_G_ENC_INDEX>` ioctl provides meta data about a compressed
......@@ -200,8 +201,7 @@ video elementary streams.
type.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-ext-ctrls.rst
View file @ 586027ce
......@@ -6,19 +6,18 @@
ioctl VIDIOC_G_EXT_CTRLS, VIDIOC_S_EXT_CTRLS, VIDIOC_TRY_EXT_CTRLS
******************************************************************
*man VIDIOC_G_EXT_CTRLS(2)*
NAME
====
VIDIOC_S_EXT_CTRLS
VIDIOC_TRY_EXT_CTRLS
Get or set the value of several controls, try control values
VIDIOC_G_EXT_CTRLS - VIDIOC_S_EXT_CTRLS - VIDIOC_TRY_EXT_CTRLS - Get or set the value of several controls, try control values
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_ext_controls *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +30,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
These ioctls allow the caller to get or set multiple controls
......@@ -452,8 +451,7 @@ still cause this situation.
described in :ref:`rf-tuner-controls`.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-fbuf.rst
View file @ 586027ce
......@@ -6,20 +6,20 @@
ioctl VIDIOC_G_FBUF, VIDIOC_S_FBUF
**********************************
*man VIDIOC_G_FBUF(2)*
NAME
====
VIDIOC_S_FBUF
Get or set frame buffer overlay parameters
VIDIOC_G_FBUF - VIDIOC_S_FBUF - Get or set frame buffer overlay parameters
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_framebuffer *argp )
.. cpp:function:: int ioctl( int fd, int request, const struct v4l2_framebuffer *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +31,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
Applications can use the :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` and :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` ioctl
......@@ -477,8 +477,7 @@ destructive video overlay.
:ref:`v4l2_window <v4l2-window>` is being used.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-fmt.rst
View file @ 586027ce
......@@ -6,19 +6,18 @@
ioctl VIDIOC_G_FMT, VIDIOC_S_FMT, VIDIOC_TRY_FMT
************************************************
*man VIDIOC_G_FMT(2)*
NAME
====
VIDIOC_S_FMT
VIDIOC_TRY_FMT
Get or set the data format, try a format
VIDIOC_G_FMT - VIDIOC_S_FMT - VIDIOC_TRY_FMT - Get or set the data format, try a format
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_format *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -30,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
These ioctls are used to negotiate the format of data (typically image
......@@ -176,8 +175,7 @@ The format as returned by :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` must be identical
- Place holder for future extensions.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-frequency.rst
View file @ 586027ce
......@@ -6,20 +6,20 @@
ioctl VIDIOC_G_FREQUENCY, VIDIOC_S_FREQUENCY
********************************************
*man VIDIOC_G_FREQUENCY(2)*
NAME
====
VIDIOC_S_FREQUENCY
Get or set tuner or modulator radio frequency
VIDIOC_G_FREQUENCY - VIDIOC_S_FREQUENCY - Get or set tuner or modulator radio frequency
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_frequency *argp )
.. cpp:function:: int ioctl( int fd, int request, const struct v4l2_frequency *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +31,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To get the current tuner or modulator radio frequency applications set
......@@ -107,8 +107,7 @@ write-only ioctl, it does not return the actual new frequency.
the array to zero.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-input.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl VIDIOC_G_INPUT, VIDIOC_S_INPUT
************************************
*man VIDIOC_G_INPUT(2)*
NAME
====
VIDIOC_S_INPUT
Query or select the current video input
VIDIOC_G_INPUT - VIDIOC_S_INPUT - Query or select the current video input
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, int *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To query the current video input applications call the
......@@ -50,7 +50,7 @@ Information about video inputs is available using the
:ref:`VIDIOC_ENUMINPUT` ioctl.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-jpegcomp.rst
View file @ 586027ce
......@@ -6,18 +6,20 @@
ioctl VIDIOC_G_JPEGCOMP, VIDIOC_S_JPEGCOMP
******************************************
*man VIDIOC_G_JPEGCOMP(2)*
NAME
====
VIDIOC_S_JPEGCOMP
VIDIOC_G_JPEGCOMP - VIDIOC_S_JPEGCOMP
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, v4l2_jpegcompression *argp )
.. cpp:function:: int ioctl( int fd, int request, const v4l2_jpegcompression *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +31,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
These ioctls are **deprecated**. New drivers and applications should use
......@@ -173,8 +175,7 @@ encoding. You usually do want to add them.
- App segment, driver will always use APP0
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-modulator.rst
View file @ 586027ce
......@@ -6,20 +6,20 @@
ioctl VIDIOC_G_MODULATOR, VIDIOC_S_MODULATOR
********************************************
*man VIDIOC_G_MODULATOR(2)*
NAME
====
VIDIOC_S_MODULATOR
Get or set modulator attributes
VIDIOC_G_MODULATOR - VIDIOC_S_MODULATOR - Get or set modulator attributes
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_modulator *argp )
.. cpp:function:: int ioctl( int fd, int request, const struct v4l2_modulator *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +31,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To query the attributes of a modulator applications initialize the
......@@ -242,8 +242,7 @@ To change the radio frequency the
- Enable the RDS encoder for a radio FM transmitter.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-output.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl VIDIOC_G_OUTPUT, VIDIOC_S_OUTPUT
**************************************
*man VIDIOC_G_OUTPUT(2)*
NAME
====
VIDIOC_S_OUTPUT
Query or select the current video output
VIDIOC_G_OUTPUT - VIDIOC_S_OUTPUT - Query or select the current video output
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, int *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To query the current video output applications call the
......@@ -51,7 +51,7 @@ Information about video outputs is available using the
:ref:`VIDIOC_ENUMOUTPUT` ioctl.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-parm.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl VIDIOC_G_PARM, VIDIOC_S_PARM
**********************************
*man VIDIOC_G_PARM(2)*
NAME
====
VIDIOC_S_PARM
Get or set streaming parameters
VIDIOC_G_PARM - VIDIOC_S_PARM - Get or set streaming parameters
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, v4l2_streamparm *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
The current video standard determines a nominal number of frames per
......@@ -340,8 +340,7 @@ union holding separate parameters for input and output devices.
- Capture might only work through the :ref:`read() <func-read>` call.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-priority.rst
View file @ 586027ce
......@@ -6,20 +6,20 @@
ioctl VIDIOC_G_PRIORITY, VIDIOC_S_PRIORITY
******************************************
*man VIDIOC_G_PRIORITY(2)*
NAME
====
VIDIOC_S_PRIORITY
Query or request the access priority associated with a file descriptor
VIDIOC_G_PRIORITY - VIDIOC_S_PRIORITY - Query or request the access priority associated with a file descriptor
Synopsis
SYNOPSIS
========
.. c:function:: int ioctl( int fd, int request, enum v4l2_priority *argp )
.. c:function:: int ioctl( int fd, int request, const enum v4l2_priority *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -32,7 +32,7 @@ Arguments
Pointer to an enum v4l2_priority type.
Description
DESCRIPTION
===========
To query the current access priority applications call the
......@@ -102,8 +102,7 @@ with a pointer to this variable.
applications which must not be interrupted, like video recording.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-selection.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl VIDIOC_G_SELECTION, VIDIOC_S_SELECTION
********************************************
*man VIDIOC_G_SELECTION(2)*
NAME
====
VIDIOC_S_SELECTION
Get or set one of the selection rectangles
VIDIOC_G_SELECTION - VIDIOC_S_SELECTION - Get or set one of the selection rectangles
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_selection *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
The ioctls are used to query and configure selection rectangles.
......@@ -187,8 +187,7 @@ Selection targets and flags are documented in
this array.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-sliced-vbi-cap.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_G_SLICED_VBI_CAP
*****************************
*man VIDIOC_G_SLICED_VBI_CAP(2)*
NAME
====
Query sliced VBI capabilities
VIDIOC_G_SLICED_VBI_CAP - Query sliced VBI capabilities
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_sliced_vbi_cap *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To find out which data services are supported by a sliced VBI capture or
......@@ -263,8 +264,7 @@ to write-read, in Linux 2.6.19.
- :cspan:`2` Set of services applicable to 625 line systems.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-std.rst
View file @ 586027ce
......@@ -6,20 +6,20 @@
ioctl VIDIOC_G_STD, VIDIOC_S_STD
********************************
*man VIDIOC_G_STD(2)*
NAME
====
VIDIOC_S_STD
Query or select the video standard of the current input
VIDIOC_G_STD - VIDIOC_S_STD - Query or select the video standard of the current input
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, v4l2_std_id *argp )
.. cpp:function:: int ioctl( int fd, int request, const v4l2_std_id *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +31,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To query and select the current video standard applications use the
......@@ -53,7 +53,7 @@ does not set the ``V4L2_IN_CAP_STD`` flag), then ``ENODATA`` error code is
returned.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-g-tuner.rst
View file @ 586027ce
......@@ -6,20 +6,20 @@
ioctl VIDIOC_G_TUNER, VIDIOC_S_TUNER
************************************
*man VIDIOC_G_TUNER(2)*
NAME
====
VIDIOC_S_TUNER
Get or set tuner attributes
VIDIOC_G_TUNER - VIDIOC_S_TUNER - Get or set tuner attributes
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_tuner *argp )
.. cpp:function:: int ioctl( int fd, int request, const struct v4l2_tuner *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +31,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To query the attributes of a tuner applications initialize the ``index``
......@@ -692,8 +692,7 @@ To change the radio frequency the
- Lang1/Lang2 (preferred) or Lang1/Lang1
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-log-status.rst
View file @ 586027ce
......@@ -6,17 +6,23 @@
ioctl VIDIOC_LOG_STATUS
***********************
*man VIDIOC_LOG_STATUS(2)*
NAME
====
Log driver status information
VIDIOC_LOG_STATUS - Log driver status information
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request )
Description
ARGUMENTS
=========
DESCRIPTION
===========
As the video/audio devices become more complicated it becomes harder to
......@@ -31,7 +37,7 @@ This ioctl is optional and not all drivers support it. It was introduced
in Linux 2.6.15.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-overlay.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_OVERLAY
********************
*man VIDIOC_OVERLAY(2)*
NAME
====
Start or stop video overlay
VIDIOC_OVERLAY - Start or stop video overlay
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, const int *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
This ioctl is part of the :ref:`video overlay <overlay>` I/O method.
......@@ -41,7 +42,7 @@ Drivers do not support :ref:`VIDIOC_STREAMON` or
``V4L2_BUF_TYPE_VIDEO_OVERLAY``.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-prepare-buf.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_PREPARE_BUF
************************
*man VIDIOC_PREPARE_BUF(2)*
NAME
====
Prepare a buffer for I/O
VIDIOC_PREPARE_BUF - Prepare a buffer for I/O
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_buffer *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
Applications can optionally call the :ref:`VIDIOC_PREPARE_BUF` ioctl to
......@@ -44,7 +45,7 @@ The :ref:`struct v4l2_buffer <v4l2-buffer>` structure is specified in
:ref:`buffer`.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-qbuf.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl VIDIOC_QBUF, VIDIOC_DQBUF
*******************************
*man VIDIOC_QBUF(2)*
NAME
====
VIDIOC_DQBUF
Exchange a buffer with the driver
VIDIOC_QBUF - VIDIOC_DQBUF - Exchange a buffer with the driver
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_buffer *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
Applications call the ``VIDIOC_QBUF`` ioctl to enqueue an empty
......@@ -116,7 +116,7 @@ The :ref:`struct v4l2_buffer <v4l2-buffer>` structure is specified in
:ref:`buffer`.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-query-dv-timings.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl VIDIOC_QUERY_DV_TIMINGS
*****************************
*man VIDIOC_QUERY_DV_TIMINGS(2)*
NAME
====
VIDIOC_SUBDEV_QUERY_DV_TIMINGS
Sense the DV preset received by the current input
VIDIOC_QUERY_DV_TIMINGS - VIDIOC_SUBDEV_QUERY_DV_TIMINGS - Sense the DV preset received by the current input
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_dv_timings *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
The hardware may be able to detect the current DV timings automatically,
......@@ -61,7 +61,7 @@ found timings with the hardware's capabilities in order to give more
precise feedback to the user.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-querybuf.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_QUERYBUF
*********************
*man VIDIOC_QUERYBUF(2)*
NAME
====
Query the status of a buffer
VIDIOC_QUERYBUF - Query the status of a buffer
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_buffer *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
This ioctl is part of the :ref:`streaming <mmap>` I/O method. It can
......@@ -67,7 +68,7 @@ The :ref:`struct v4l2_buffer <v4l2-buffer>` structure is specified in
:ref:`buffer`.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-querycap.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_QUERYCAP
*********************
*man VIDIOC_QUERYCAP(2)*
NAME
====
Query device capabilities
VIDIOC_QUERYCAP - Query device capabilities
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_capability *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
All V4L2 devices support the ``VIDIOC_QUERYCAP`` ioctl. It is used to
......@@ -419,8 +420,7 @@ specification the ioctl returns an ``EINVAL`` error code.
``device_caps`` field.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-queryctrl.rst
View file @ 586027ce
......@@ -6,14 +6,12 @@
ioctls VIDIOC_QUERYCTRL, VIDIOC_QUERY_EXT_CTRL and VIDIOC_QUERYMENU
*******************************************************************
*man VIDIOC_QUERYCTRL(2)*
NAME
====
VIDIOC_QUERY_EXT_CTRL
VIDIOC_QUERYMENU
Enumerate controls and menu control items
VIDIOC_QUERYCTRL - VIDIOC_QUERY_EXT_CTRL - VIDIOC_QUERYMENU - Enumerate controls and menu control items
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_queryctrl *argp )
......@@ -22,7 +20,8 @@ Synopsis
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_querymenu *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -34,7 +33,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To query the attributes of a control applications set the ``id`` field
......@@ -754,8 +753,7 @@ See also the examples in :ref:`control`.
``V4L2_CTRL_TYPE_BUTTON`` have this flag set.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-querystd.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_QUERYSTD
*********************
*man VIDIOC_QUERYSTD(2)*
NAME
====
Sense the video standard received by the current input
VIDIOC_QUERYSTD - Sense the video standard received by the current input
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, v4l2_std_id *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
The hardware may be able to detect the current video standard
......@@ -53,7 +54,7 @@ standard is valid they will have to stop streaming, set the new
standard, allocate new buffers and start streaming again.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-reqbufs.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_REQBUFS
********************
*man VIDIOC_REQBUFS(2)*
NAME
====
Initiate Memory Mapping or User Pointer I/O
VIDIOC_REQBUFS - Initiate Memory Mapping or User Pointer I/O
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_requestbuffers *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
This ioctl is used to initiate :ref:`memory mapped <mmap>`,
......@@ -111,8 +112,7 @@ any DMA in progress, an implicit
must set the array to zero.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-s-hw-freq-seek.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_S_HW_FREQ_SEEK
***************************
*man VIDIOC_S_HW_FREQ_SEEK(2)*
NAME
====
Perform a hardware frequency seek
VIDIOC_S_HW_FREQ_SEEK - Perform a hardware frequency seek
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_hw_freq_seek *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
Start a hardware frequency seek from the current frequency. To do this
......@@ -154,8 +155,7 @@ error code is returned and no seek takes place.
zero.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-streamon.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl VIDIOC_STREAMON, VIDIOC_STREAMOFF
***************************************
*man VIDIOC_STREAMON(2)*
NAME
====
VIDIOC_STREAMOFF
Start or stop streaming I/O
VIDIOC_STREAMON - VIDIOC_STREAMOFF - Start or stop streaming I/O
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, const int *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
The ``VIDIOC_STREAMON`` and ``VIDIOC_STREAMOFF`` ioctl start and stop
......@@ -81,7 +81,7 @@ no notion of starting or stopping "now". Buffer timestamps can be used
to synchronize with other events.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-subdev-enum-frame-interval.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL
***************************************
*man VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL(2)*
NAME
====
Enumerate frame intervals
VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL - Enumerate frame intervals
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_subdev_frame_interval_enum * argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
This ioctl lets applications enumerate available frame intervals on a
......@@ -136,8 +137,7 @@ multiple pads of the same sub-device is not defined.
the array to zero.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-subdev-enum-frame-size.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_SUBDEV_ENUM_FRAME_SIZE
***********************************
*man VIDIOC_SUBDEV_ENUM_FRAME_SIZE(2)*
NAME
====
Enumerate media bus frame sizes
VIDIOC_SUBDEV_ENUM_FRAME_SIZE - Enumerate media bus frame sizes
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_subdev_frame_size_enum * argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
This ioctl allows applications to enumerate all frame sizes supported by
......@@ -146,8 +147,7 @@ information about try formats.
the array to zero.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-subdev-enum-mbus-code.rst
View file @ 586027ce
......@@ -6,17 +6,18 @@
ioctl VIDIOC_SUBDEV_ENUM_MBUS_CODE
**********************************
*man VIDIOC_SUBDEV_ENUM_MBUS_CODE(2)*
NAME
====
Enumerate media bus formats
VIDIOC_SUBDEV_ENUM_MBUS_CODE - Enumerate media bus formats
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_subdev_mbus_code_enum * argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -28,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
To enumerate media bus formats available at a given sub-device pad
......@@ -99,8 +100,7 @@ information about the try formats.
the array to zero.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-subdev-g-crop.rst
View file @ 586027ce
......@@ -6,20 +6,20 @@
ioctl VIDIOC_SUBDEV_G_CROP, VIDIOC_SUBDEV_S_CROP
************************************************
*man VIDIOC_SUBDEV_G_CROP(2)*
NAME
====
VIDIOC_SUBDEV_S_CROP
Get or set the crop rectangle on a subdev pad
VIDIOC_SUBDEV_G_CROP - VIDIOC_SUBDEV_S_CROP - Get or set the crop rectangle on a subdev pad
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_subdev_crop *argp )
.. cpp:function:: int ioctl( int fd, int request, const struct v4l2_subdev_crop *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -31,7 +31,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
**Note**
......@@ -114,8 +114,7 @@ modified format should be as close as possible to the original request.
the array to zero.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-subdev-g-fmt.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl VIDIOC_SUBDEV_G_FMT, VIDIOC_SUBDEV_S_FMT
**********************************************
*man VIDIOC_SUBDEV_G_FMT(2)*
NAME
====
VIDIOC_SUBDEV_S_FMT
Get or set the data format on a subdev pad
VIDIOC_SUBDEV_G_FMT - VIDIOC_SUBDEV_S_FMT - Get or set the data format on a subdev pad
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_subdev_format *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
These ioctls are used to negotiate the frame format at specific subdev
......@@ -144,8 +144,7 @@ should be as close as possible to the original request.
- Active formats, applied to the hardware.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......@@ -164,7 +163,6 @@ EINVAL
references a non-existing format.
Return Value
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-subdev-g-frame-interval.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl VIDIOC_SUBDEV_G_FRAME_INTERVAL, VIDIOC_SUBDEV_S_FRAME_INTERVAL
********************************************************************
*man VIDIOC_SUBDEV_G_FRAME_INTERVAL(2)*
NAME
====
VIDIOC_SUBDEV_S_FRAME_INTERVAL
Get or set the frame interval on a subdev pad
VIDIOC_SUBDEV_G_FRAME_INTERVAL - VIDIOC_SUBDEV_S_FRAME_INTERVAL - Get or set the frame interval on a subdev pad
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_subdev_frame_interval *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -30,7 +30,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
These ioctls are used to get and set the frame interval at specific
......@@ -100,8 +100,7 @@ the same sub-device is not defined.
the array to zero.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-subdev-g-selection.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl VIDIOC_SUBDEV_G_SELECTION, VIDIOC_SUBDEV_S_SELECTION
**********************************************************
*man VIDIOC_SUBDEV_G_SELECTION(2)*
NAME
====
VIDIOC_SUBDEV_S_SELECTION
Get or set selection rectangles on a subdev pad
VIDIOC_SUBDEV_G_SELECTION - VIDIOC_SUBDEV_S_SELECTION - Get or set selection rectangles on a subdev pad
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_subdev_selection *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
The selections are used to configure various image processing
......@@ -122,8 +122,7 @@ Selection targets and flags are documented in
the array to zero.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
Documentation/linux_tv/media/v4l/vidioc-subscribe-event.rst
View file @ 586027ce
......@@ -6,18 +6,18 @@
ioctl VIDIOC_SUBSCRIBE_EVENT, VIDIOC_UNSUBSCRIBE_EVENT
******************************************************
*man VIDIOC_SUBSCRIBE_EVENT(2)*
NAME
====
VIDIOC_UNSUBSCRIBE_EVENT
Subscribe or unsubscribe event
VIDIOC_SUBSCRIBE_EVENT - VIDIOC_UNSUBSCRIBE_EVENT - Subscribe or unsubscribe event
Synopsis
SYNOPSIS
========
.. cpp:function:: int ioctl( int fd, int request, struct v4l2_event_subscription *argp )
Arguments
ARGUMENTS
=========
``fd``
......@@ -29,7 +29,7 @@ Arguments
``argp``
Description
DESCRIPTION
===========
Subscribe or unsubscribe V4L2 event. Subscribed events are dequeued by
......@@ -126,8 +126,7 @@ using the :ref:`VIDIOC_DQEVENT` ioctl.
situations like that.
Return Value
RETURN VALUE
============
On success 0 is returned, on error -1 and the ``errno`` variable is set
......
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