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Commit 54f38fca authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab
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media: docs: move uAPI book to userspace-api/media 

Since 2017, there is an space reserved for userspace API,
created by changeset 1d596dee ("docs: Create a user-space API guide").

As the media subsystem was one of the first subsystems to use
Sphinx, until this patch, we were keeping things on a separate
place.

Let's just use the new location, as having all uAPI altogether
will likely make things easier for developers.
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent 5dfb8db5
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Showing with 77463 additions and 77461 deletions
Documentation/ABI/testing/debugfs-cec-error-inj
View file @ 54f38fca
......@@ -37,4 +37,4 @@ when changes are made.
The following CEC error injection implementations exist:
- Documentation/media/uapi/cec/cec-pin-error-inj.rst
- Documentation/userspace-api/media/cec/cec-pin-error-inj.rst
Documentation/Makefile
View file @ 54f38fca
......@@ -55,15 +55,15 @@ I18NSPHINXOPTS = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
loop_cmd = $(echo-cmd) $(cmd_$(1)) || exit;
# $2 sphinx builder e.g. "html"
# $3 name of the build subfolder / e.g. "media", used as:
# $3 name of the build subfolder / e.g. "userspace-api/media", used as:
# * dest folder relative to $(BUILDDIR) and
# * cache folder relative to $(BUILDDIR)/.doctrees
# $4 dest subfolder e.g. "man" for man pages at media/man
# $4 dest subfolder e.g. "man" for man pages at userspace-api/media/man
# $5 reST source folder relative to $(srctree)/$(src),
# e.g. "media" for the linux-tv book-set at ./Documentation/media
# e.g. "userspace-api/media" for the linux-tv book-set at ./Documentation/userspace-api/media
quiet_cmd_sphinx = SPHINX $@ --> file://$(abspath $(BUILDDIR)/$3/$4)
cmd_sphinx = $(MAKE) BUILDDIR=$(abspath $(BUILDDIR)) $(build)=Documentation/media $2 && \
cmd_sphinx = $(MAKE) BUILDDIR=$(abspath $(BUILDDIR)) $(build)=Documentation/userspace-api/media $2 && \
PYTHONDONTWRITEBYTECODE=1 \
BUILDDIR=$(abspath $(BUILDDIR)) SPHINX_CONF=$(abspath $(srctree)/$(src)/$5/$(SPHINX_CONF)) \
$(PYTHON) $(srctree)/scripts/jobserver-exec \
......@@ -120,7 +120,7 @@ refcheckdocs:
cleandocs:
$(Q)rm -rf $(BUILDDIR)
$(Q)$(MAKE) BUILDDIR=$(abspath $(BUILDDIR)) $(build)=Documentation/media clean
$(Q)$(MAKE) BUILDDIR=$(abspath $(BUILDDIR)) $(build)=Documentation/userspace-api/media clean
dochelp:
@echo ' Linux kernel internal documentation in different formats from ReST:'
......
Documentation/doc-guide/parse-headers.rst
View file @ 54f38fca
......@@ -10,7 +10,7 @@ if a symbol is not found at the documentation. That helps to keep the
uAPI documentation in sync with the Kernel changes.
The :ref:`parse_headers.pl <parse_headers>` provide a way to generate such
cross-references. It has to be called via Makefile, while building the
documentation. Please see ``Documentation/media/Makefile`` for an example
documentation. Please see ``Documentation/userspace-api/media/Makefile`` for an example
about how to use it inside the Kernel tree.
.. _parse_headers:
......
Documentation/fb/api.rst
View file @ 54f38fca
......@@ -290,12 +290,12 @@ the FB_CAP_FOURCC bit in the fb_fix_screeninfo capabilities field.
FOURCC definitions are located in the linux/videodev2.h header. However, and
despite starting with the V4L2_PIX_FMT_prefix, they are not restricted to V4L2
and don't require usage of the V4L2 subsystem. FOURCC documentation is
available in Documentation/media/uapi/v4l/pixfmt.rst.
available in Documentation/userspace-api/media/v4l/pixfmt.rst.
To select a format, applications set the grayscale field to the desired FOURCC.
For YUV formats, they should also select the appropriate colorspace by setting
the colorspace field to one of the colorspaces listed in linux/videodev2.h and
documented in Documentation/media/uapi/v4l/colorspaces.rst.
documented in Documentation/userspace-api/media/v4l/colorspaces.rst.
The red, green, blue and transp fields are not used with the FOURCC-based API.
For forward compatibility reasons applications must zero those fields, and
......
Documentation/media/Makefile deleted 100644 → 0
View file @ 5dfb8db5
# SPDX-License-Identifier: GPL-2.0
# Rules to convert a .h file to inline RST documentation
SRC_DIR=$(srctree)/Documentation/media
PARSER = $(srctree)/Documentation/sphinx/parse-headers.pl
UAPI = $(srctree)/include/uapi/linux
KAPI = $(srctree)/include/linux
FILES = audio.h.rst ca.h.rst dmx.h.rst frontend.h.rst net.h.rst video.h.rst \
videodev2.h.rst media.h.rst cec.h.rst lirc.h.rst
TARGETS := $(addprefix $(BUILDDIR)/, $(FILES))
gen_rst = \
echo ${PARSER} $< $@ $(SRC_DIR)/$(notdir $@).exceptions; \
${PARSER} $< $@ $(SRC_DIR)/$(notdir $@).exceptions
quiet_gen_rst = echo ' PARSE $(patsubst $(srctree)/%,%,$<)'; \
${PARSER} $< $@ $(SRC_DIR)/$(notdir $@).exceptions
silent_gen_rst = ${gen_rst}
$(BUILDDIR)/audio.h.rst: ${UAPI}/dvb/audio.h ${PARSER} $(SRC_DIR)/audio.h.rst.exceptions
@$($(quiet)gen_rst)
$(BUILDDIR)/ca.h.rst: ${UAPI}/dvb/ca.h ${PARSER} $(SRC_DIR)/ca.h.rst.exceptions
@$($(quiet)gen_rst)
$(BUILDDIR)/dmx.h.rst: ${UAPI}/dvb/dmx.h ${PARSER} $(SRC_DIR)/dmx.h.rst.exceptions
@$($(quiet)gen_rst)
$(BUILDDIR)/frontend.h.rst: ${UAPI}/dvb/frontend.h ${PARSER} $(SRC_DIR)/frontend.h.rst.exceptions
@$($(quiet)gen_rst)
$(BUILDDIR)/net.h.rst: ${UAPI}/dvb/net.h ${PARSER} $(SRC_DIR)/net.h.rst.exceptions
@$($(quiet)gen_rst)
$(BUILDDIR)/video.h.rst: ${UAPI}/dvb/video.h ${PARSER} $(SRC_DIR)/video.h.rst.exceptions
@$($(quiet)gen_rst)
$(BUILDDIR)/videodev2.h.rst: ${UAPI}/videodev2.h ${PARSER} $(SRC_DIR)/videodev2.h.rst.exceptions
@$($(quiet)gen_rst)
$(BUILDDIR)/media.h.rst: ${UAPI}/media.h ${PARSER} $(SRC_DIR)/media.h.rst.exceptions
@$($(quiet)gen_rst)
$(BUILDDIR)/cec.h.rst: ${UAPI}/cec.h ${PARSER} $(SRC_DIR)/cec.h.rst.exceptions
@$($(quiet)gen_rst)
$(BUILDDIR)/lirc.h.rst: ${UAPI}/lirc.h ${PARSER} $(SRC_DIR)/lirc.h.rst.exceptions
@$($(quiet)gen_rst)
# Media build rules
.PHONY: all html epub xml latex
all: $(IMGDOT) $(BUILDDIR) ${TARGETS}
html: all
epub: all
xml: all
latex: $(IMGPDF) all
linkcheck:
clean:
-rm -f $(DOTTGT) $(IMGTGT) ${TARGETS} 2>/dev/null
$(BUILDDIR):
$(Q)mkdir -p $@
Documentation/media/index.rst
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......@@ -12,7 +12,7 @@ Linux Media Subsystem Documentation
.. toctree::
:maxdepth: 2
media_uapi
../userspace-api/media/index
media_kapi
dvb-drivers/index
v4l-drivers/index
......
Documentation/media/media_uapi.rst deleted 100644 → 0
View file @ 5dfb8db5
.. SPDX-License-Identifier: GPL-2.0
.. include:: <isonum.txt>
########################################
Linux Media Infrastructure userspace API
########################################
**Copyright** |copy| 2009-2016 : LinuxTV Developers
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.1 or
any later version published by the Free Software Foundation, with no
Invariant Sections. A copy of the license is included in the chapter
entitled "GNU Free Documentation License".
.. only:: html
.. class:: toc-title
Table of Contents
.. toctree::
:maxdepth: 1
intro
uapi/v4l/v4l2
uapi/dvb/dvbapi
uapi/rc/remote_controllers
uapi/mediactl/media-controller
uapi/cec/cec-api
uapi/gen-errors
uapi/fdl-appendix
Documentation/media/typical_media_device.svg deleted 100644 → 0
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This diff is collapsed.
Documentation/media/uapi/cec/cec-api.rst deleted 100644 → 0
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.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. include:: <isonum.txt>
.. _cec:
#########################################
Part V - Consumer Electronics Control API
#########################################
This part describes the CEC: Consumer Electronics Control
.. only:: html
.. class:: toc-title
Table of Contents
.. toctree::
:maxdepth: 5
:numbered:
cec-intro
cec-funcs
cec-pin-error-inj
cec-header
**********************
Revision and Copyright
**********************
Authors:
- Verkuil, Hans <hverkuil-cisco@xs4all.nl>
- Initial version.
**Copyright** |copy| 2016 : Hans Verkuil
****************
Revision History
****************
:revision: 1.0.0 / 2016-03-17 (*hv*)
Initial revision
Documentation/media/uapi/cec/cec-func-close.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _cec-func-close:
***********
cec close()
***********
Name
====
cec-close - Close a cec device
Synopsis
========
.. code-block:: c
#include <unistd.h>
.. c:function:: int close( int fd )
:name: cec-close
Arguments
=========
``fd``
File descriptor returned by :c:func:`open() <cec-open>`.
Description
===========
Closes the cec device. Resources associated with the file descriptor are
freed. The device configuration remain unchanged.
Return Value
============
:c:func:`close() <cec-close>` returns 0 on success. On error, -1 is returned, and
``errno`` is set appropriately. Possible error codes are:
``EBADF``
``fd`` is not a valid open file descriptor.
Documentation/media/uapi/cec/cec-func-ioctl.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _cec-func-ioctl:
***********
cec ioctl()
***********
Name
====
cec-ioctl - Control a cec device
Synopsis
========
.. code-block:: c
#include <sys/ioctl.h>
.. c:function:: int ioctl( int fd, int request, void *argp )
:name: cec-ioctl
Arguments
=========
``fd``
File descriptor returned by :c:func:`open() <cec-open>`.
``request``
CEC ioctl request code as defined in the cec.h header file, for
example :ref:`CEC_ADAP_G_CAPS <CEC_ADAP_G_CAPS>`.
``argp``
Pointer to a request-specific structure.
Description
===========
The :c:func:`ioctl() <cec-ioctl>` function manipulates cec device parameters. The
argument ``fd`` must be an open file descriptor.
The ioctl ``request`` code specifies the cec function to be called. It
has encoded in it whether the argument is an input, output or read/write
parameter, and the size of the argument ``argp`` in bytes.
Macros and structures definitions specifying cec ioctl requests and
their parameters are located in the cec.h header file. All cec ioctl
requests, their respective function and parameters are specified in
:ref:`cec-user-func`.
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.
Request-specific error codes are listed in the individual requests
descriptions.
When an ioctl that takes an output or read/write parameter fails, the
parameter remains unmodified.
Documentation/media/uapi/cec/cec-func-open.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _cec-func-open:
**********
cec open()
**********
Name
====
cec-open - Open a cec device
Synopsis
========
.. code-block:: c
#include <fcntl.h>
.. c:function:: int open( const char *device_name, int flags )
:name: cec-open
Arguments
=========
``device_name``
Device to be opened.
``flags``
Open flags. Access mode must be ``O_RDWR``.
When the ``O_NONBLOCK`` flag is given, the
:ref:`CEC_RECEIVE <CEC_RECEIVE>` and :ref:`CEC_DQEVENT <CEC_DQEVENT>` ioctls
will return the ``EAGAIN`` error code when no message or event is available, and
ioctls :ref:`CEC_TRANSMIT <CEC_TRANSMIT>`,
:ref:`CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` and
:ref:`CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
all return 0.
Other flags have no effect.
Description
===========
To open a cec device applications call :c:func:`open() <cec-open>` with the
desired device name. The function has no side effects; the device
configuration remain unchanged.
When the device is opened in read-only mode, attempts to modify its
configuration will result in an error, and ``errno`` will be set to
EBADF.
Return Value
============
:c:func:`open() <cec-open>` returns the new file descriptor on success. On error,
-1 is returned, and ``errno`` is set appropriately. Possible error codes
include:
``EACCES``
The requested access to the file is not allowed.
``EMFILE``
The process already has the maximum number of files open.
``ENFILE``
The system limit on the total number of open files has been reached.
``ENOMEM``
Insufficient kernel memory was available.
``ENXIO``
No device corresponding to this device special file exists.
Documentation/media/uapi/cec/cec-func-poll.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _cec-func-poll:
**********
cec poll()
**********
Name
====
cec-poll - Wait for some event on a file descriptor
Synopsis
========
.. code-block:: c
#include <sys/poll.h>
.. c:function:: int poll( struct pollfd *ufds, unsigned int nfds, int timeout )
:name: cec-poll
Arguments
=========
``ufds``
List of FD events to be watched
``nfds``
Number of FD events at the \*ufds array
``timeout``
Timeout to wait for events
Description
===========
With the :c:func:`poll() <cec-poll>` function applications can wait for CEC
events.
On success :c:func:`poll() <cec-poll>` returns the number of file descriptors
that have been selected (that is, file descriptors for which the
``revents`` field of the respective struct :c:type:`pollfd`
is non-zero). CEC devices set the ``POLLIN`` and ``POLLRDNORM`` flags in
the ``revents`` field if there are messages in the receive queue. If the
transmit queue has room for new messages, the ``POLLOUT`` and
``POLLWRNORM`` flags are set. If there are events in the event queue,
then the ``POLLPRI`` flag is set. When the function times out it returns
a value of zero, on failure it returns -1 and the ``errno`` variable is
set appropriately.
For more details see the :c:func:`poll() <cec-poll>` manual page.
Return Value
============
On success, :c:func:`poll() <cec-poll>` returns the number structures which have
non-zero ``revents`` fields, or zero if the call timed out. On error -1
is returned, and the ``errno`` variable is set appropriately:
``EBADF``
One or more of the ``ufds`` members specify an invalid file
descriptor.
``EFAULT``
``ufds`` references an inaccessible memory area.
``EINTR``
The call was interrupted by a signal.
``EINVAL``
The ``nfds`` value exceeds the ``RLIMIT_NOFILE`` value. Use
``getrlimit()`` to obtain this value.
Documentation/media/uapi/cec/cec-funcs.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _cec-user-func:
******************
Function Reference
******************
.. toctree::
:maxdepth: 1
cec-func-open
cec-func-close
cec-func-ioctl
cec-func-poll
cec-ioc-adap-g-caps
cec-ioc-adap-g-log-addrs
cec-ioc-adap-g-phys-addr
cec-ioc-adap-g-conn-info
cec-ioc-dqevent
cec-ioc-g-mode
cec-ioc-receive
Documentation/media/uapi/cec/cec-header.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _cec_header:
***************
CEC Header File
***************
.. kernel-include:: $BUILDDIR/cec.h.rst
Documentation/media/uapi/cec/cec-intro.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _cec-intro:
Introduction
============
HDMI connectors provide a single pin for use by the Consumer Electronics
Control protocol. This protocol allows different devices connected by an
HDMI cable to communicate. The protocol for CEC version 1.4 is defined
in supplements 1 (CEC) and 2 (HEAC or HDMI Ethernet and Audio Return
Channel) of the HDMI 1.4a (:ref:`hdmi`) specification and the
extensions added to CEC version 2.0 are defined in chapter 11 of the
HDMI 2.0 (:ref:`hdmi2`) specification.
The bitrate is very slow (effectively no more than 36 bytes per second)
and is based on the ancient AV.link protocol used in old SCART
connectors. The protocol closely resembles a crazy Rube Goldberg
contraption and is an unholy mix of low and high level messages. Some
messages, especially those part of the HEAC protocol layered on top of
CEC, need to be handled by the kernel, others can be handled either by
the kernel or by userspace.
In addition, CEC can be implemented in HDMI receivers, transmitters and
in USB devices that have an HDMI input and an HDMI output and that
control just the CEC pin.
Drivers that support CEC will create a CEC device node (/dev/cecX) to
give userspace access to the CEC adapter. The
:ref:`CEC_ADAP_G_CAPS` ioctl will tell userspace what it is allowed to do.
In order to check the support and test it, it is suggested to download
the `v4l-utils <https://git.linuxtv.org/v4l-utils.git/>`_ package. It
provides three tools to handle CEC:
- cec-ctl: the Swiss army knife of CEC. Allows you to configure, transmit
and monitor CEC messages.
- cec-compliance: does a CEC compliance test of a remote CEC device to
determine how compliant the CEC implementation is.
- cec-follower: emulates a CEC follower.
Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _CEC_ADAP_G_CAPS:
*********************
ioctl CEC_ADAP_G_CAPS
*********************
Name
====
CEC_ADAP_G_CAPS - Query device capabilities
Synopsis
========
.. c:function:: int ioctl( int fd, CEC_ADAP_G_CAPS, struct cec_caps *argp )
:name: CEC_ADAP_G_CAPS
Arguments
=========
``fd``
File descriptor returned by :c:func:`open() <cec-open>`.
``argp``
Description
===========
All cec devices must support :ref:`ioctl CEC_ADAP_G_CAPS <CEC_ADAP_G_CAPS>`. To query
device information, applications call the ioctl with a pointer to a
struct :c:type:`cec_caps`. The driver fills the structure and
returns the information to the application. The ioctl never fails.
.. tabularcolumns:: |p{1.2cm}|p{2.5cm}|p{13.8cm}|
.. c:type:: cec_caps
.. flat-table:: struct cec_caps
:header-rows: 0
:stub-columns: 0
:widths: 1 1 16
* - char
- ``driver[32]``
- The name of the cec adapter driver.
* - char
- ``name[32]``
- The name of this CEC adapter. The combination ``driver`` and
``name`` must be unique.
* - __u32
- ``capabilities``
- The capabilities of the CEC adapter, see
:ref:`cec-capabilities`.
* - __u32
- ``version``
- CEC Framework API version, formatted with the ``KERNEL_VERSION()``
macro.
.. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.6cm}|
.. _cec-capabilities:
.. flat-table:: CEC Capabilities Flags
:header-rows: 0
:stub-columns: 0
:widths: 3 1 8
* .. _`CEC-CAP-PHYS-ADDR`:
- ``CEC_CAP_PHYS_ADDR``
- 0x00000001
- Userspace has to configure the physical address by calling
:ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>`. If
this capability isn't set, then setting the physical address is
handled by the kernel whenever the EDID is set (for an HDMI
receiver) or read (for an HDMI transmitter).
* .. _`CEC-CAP-LOG-ADDRS`:
- ``CEC_CAP_LOG_ADDRS``
- 0x00000002
- Userspace has to configure the logical addresses by calling
:ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`. If
this capability isn't set, then the kernel will have configured
this.
* .. _`CEC-CAP-TRANSMIT`:
- ``CEC_CAP_TRANSMIT``
- 0x00000004
- Userspace can transmit CEC messages by calling
:ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`. This implies that
userspace can be a follower as well, since being able to transmit
messages is a prerequisite of becoming a follower. If this
capability isn't set, then the kernel will handle all CEC
transmits and process all CEC messages it receives.
* .. _`CEC-CAP-PASSTHROUGH`:
- ``CEC_CAP_PASSTHROUGH``
- 0x00000008
- Userspace can use the passthrough mode by calling
:ref:`ioctl CEC_S_MODE <CEC_S_MODE>`.
* .. _`CEC-CAP-RC`:
- ``CEC_CAP_RC``
- 0x00000010
- This adapter supports the remote control protocol.
* .. _`CEC-CAP-MONITOR-ALL`:
- ``CEC_CAP_MONITOR_ALL``
- 0x00000020
- The CEC hardware can monitor all messages, not just directed and
broadcast messages.
* .. _`CEC-CAP-NEEDS-HPD`:
- ``CEC_CAP_NEEDS_HPD``
- 0x00000040
- The CEC hardware is only active if the HDMI Hotplug Detect pin is
high. This makes it impossible to use CEC to wake up displays that
set the HPD pin low when in standby mode, but keep the CEC bus
alive.
* .. _`CEC-CAP-MONITOR-PIN`:
- ``CEC_CAP_MONITOR_PIN``
- 0x00000080
- The CEC hardware can monitor CEC pin changes from low to high voltage
and vice versa. When in pin monitoring mode the application will
receive ``CEC_EVENT_PIN_CEC_LOW`` and ``CEC_EVENT_PIN_CEC_HIGH`` events.
* .. _`CEC-CAP-CONNECTOR-INFO`:
- ``CEC_CAP_CONNECTOR_INFO``
- 0x00000100
- If this capability is set, then :ref:`CEC_ADAP_G_CONNECTOR_INFO` can
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.
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View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _CEC_ADAP_PHYS_ADDR:
.. _CEC_ADAP_G_PHYS_ADDR:
.. _CEC_ADAP_S_PHYS_ADDR:
****************************************************
ioctls CEC_ADAP_G_PHYS_ADDR and CEC_ADAP_S_PHYS_ADDR
****************************************************
Name
====
CEC_ADAP_G_PHYS_ADDR, CEC_ADAP_S_PHYS_ADDR - Get or set the physical address
Synopsis
========
.. c:function:: int ioctl( int fd, CEC_ADAP_G_PHYS_ADDR, __u16 *argp )
:name: CEC_ADAP_G_PHYS_ADDR
.. c:function:: int ioctl( int fd, CEC_ADAP_S_PHYS_ADDR, __u16 *argp )
:name: CEC_ADAP_S_PHYS_ADDR
Arguments
=========
``fd``
File descriptor returned by :c:func:`open() <cec-open>`.
``argp``
Pointer to the CEC address.
Description
===========
To query the current physical address applications call
:ref:`ioctl CEC_ADAP_G_PHYS_ADDR <CEC_ADAP_G_PHYS_ADDR>` with a pointer to a __u16 where the
driver stores the physical address.
To set a new physical address applications store the physical address in
a __u16 and call :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` with a pointer to
this integer. The :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` is only available if
``CEC_CAP_PHYS_ADDR`` is set (the ``ENOTTY`` error code will be returned
otherwise). The :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` can only be called
by a file descriptor in initiator mode (see :ref:`CEC_S_MODE`), if not
the ``EBUSY`` error code will be returned.
To clear an existing physical address use ``CEC_PHYS_ADDR_INVALID``.
The adapter will go to the unconfigured state.
If logical address types have been defined (see :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`),
then this ioctl will block until all
requested logical addresses have been claimed. If the file descriptor is in non-blocking mode
then it will not wait for the logical addresses to be claimed, instead it just returns 0.
A :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>` event is sent when the physical address
changes.
The physical address is a 16-bit number where each group of 4 bits
represent a digit of the physical address a.b.c.d where the most
significant 4 bits represent 'a'. The CEC root device (usually the TV)
has address 0.0.0.0. Every device that is hooked up to an input of the
TV has address a.0.0.0 (where 'a' is ≥ 1), devices hooked up to those in
turn have addresses a.b.0.0, etc. So a topology of up to 5 devices deep
is supported. The physical address a device shall use is stored in the
EDID of the sink.
For example, the EDID for each HDMI input of the TV will have a
different physical address of the form a.0.0.0 that the sources will
read out and use as their physical address.
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.
The :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` can return the following
error codes:
ENOTTY
The ``CEC_CAP_PHYS_ADDR`` capability wasn't set, so this ioctl is not supported.
EBUSY
Another filehandle is in exclusive follower or initiator mode, or the filehandle
is in mode ``CEC_MODE_NO_INITIATOR``.
EINVAL
The physical address is malformed.
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View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _CEC_DQEVENT:
*****************
ioctl CEC_DQEVENT
*****************
Name
====
CEC_DQEVENT - Dequeue a CEC event
Synopsis
========
.. c:function:: int ioctl( int fd, CEC_DQEVENT, struct cec_event *argp )
:name: CEC_DQEVENT
Arguments
=========
``fd``
File descriptor returned by :c:func:`open() <cec-open>`.
``argp``
Description
===========
CEC devices can send asynchronous events. These can be retrieved by
calling :c:func:`CEC_DQEVENT`. If the file descriptor is in
non-blocking mode and no event is pending, then it will return -1 and
set errno to the ``EAGAIN`` error code.
The internal event queues are per-filehandle and per-event type. If
there is no more room in a queue then the last event is overwritten with
the new one. This means that intermediate results can be thrown away but
that the latest event is always available. This also means that is it
possible to read two successive events that have the same value (e.g.
two :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>` events with
the same state). In that case the intermediate state changes were lost but
it is guaranteed that the state did change in between the two events.
.. tabularcolumns:: |p{1.2cm}|p{2.9cm}|p{13.4cm}|
.. c:type:: cec_event_state_change
.. flat-table:: struct cec_event_state_change
:header-rows: 0
:stub-columns: 0
:widths: 1 1 8
* - __u16
- ``phys_addr``
- The current physical address. This is ``CEC_PHYS_ADDR_INVALID`` if no
valid physical address is set.
* - __u16
- ``log_addr_mask``
- The current set of claimed logical addresses. This is 0 if no logical
addresses are claimed or if ``phys_addr`` is ``CEC_PHYS_ADDR_INVALID``.
If bit 15 is set (``1 << CEC_LOG_ADDR_UNREGISTERED``) then this device
has the unregistered logical address. In that case all other bits are 0.
* - __u16
- ``have_conn_info``
- If non-zero, then HDMI connector information is available.
This field is only valid if ``CEC_CAP_CONNECTOR_INFO`` is set. If that
capability is set and ``have_conn_info`` is zero, then that indicates
that the HDMI connector device is not instantiated, either because
the HDMI driver is still configuring the device or because the HDMI
device was unbound.
.. c:type:: cec_event_lost_msgs
.. tabularcolumns:: |p{1.0cm}|p{2.0cm}|p{14.5cm}|
.. flat-table:: struct cec_event_lost_msgs
:header-rows: 0
:stub-columns: 0
:widths: 1 1 16
* - __u32
- ``lost_msgs``
- Set to the number of lost messages since the filehandle was opened
or since the last time this event was dequeued for this
filehandle. The messages lost are the oldest messages. So when a
new message arrives and there is no more room, then the oldest
message is discarded to make room for the new one. The internal
size of the message queue guarantees that all messages received in
the last two seconds will be stored. Since messages should be
replied to within a second according to the CEC specification,
this is more than enough.
.. tabularcolumns:: |p{1.0cm}|p{4.4cm}|p{2.5cm}|p{9.6cm}|
.. c:type:: cec_event
.. flat-table:: struct cec_event
:header-rows: 0
:stub-columns: 0
:widths: 1 1 8
* - __u64
- ``ts``
- Timestamp of the event in ns.
The timestamp has been taken from the ``CLOCK_MONOTONIC`` clock.
To access the same clock from userspace use :c:func:`clock_gettime`.
* - __u32
- ``event``
- The CEC event type, see :ref:`cec-events`.
* - __u32
- ``flags``
- Event flags, see :ref:`cec-event-flags`.
* - union {
- (anonymous)
* - struct cec_event_state_change
- ``state_change``
- The new adapter state as sent by the :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>`
event.
* - struct cec_event_lost_msgs
- ``lost_msgs``
- The number of lost messages as sent by the :ref:`CEC_EVENT_LOST_MSGS <CEC-EVENT-LOST-MSGS>`
event.
* - }
-
.. tabularcolumns:: |p{5.6cm}|p{0.9cm}|p{11.0cm}|
.. _cec-events:
.. flat-table:: CEC Events Types
:header-rows: 0
:stub-columns: 0
:widths: 3 1 16
* .. _`CEC-EVENT-STATE-CHANGE`:
- ``CEC_EVENT_STATE_CHANGE``
- 1
- Generated when the CEC Adapter's state changes. When open() is
called an initial event will be generated for that filehandle with
the CEC Adapter's state at that time.
* .. _`CEC-EVENT-LOST-MSGS`:
- ``CEC_EVENT_LOST_MSGS``
- 2
- Generated if one or more CEC messages were lost because the
application didn't dequeue CEC messages fast enough.
* .. _`CEC-EVENT-PIN-CEC-LOW`:
- ``CEC_EVENT_PIN_CEC_LOW``
- 3
- Generated if the CEC pin goes from a high voltage to a low voltage.
Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN``
capability set.
* .. _`CEC-EVENT-PIN-CEC-HIGH`:
- ``CEC_EVENT_PIN_CEC_HIGH``
- 4
- Generated if the CEC pin goes from a low voltage to a high voltage.
Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN``
capability set.
* .. _`CEC-EVENT-PIN-HPD-LOW`:
- ``CEC_EVENT_PIN_HPD_LOW``
- 5
- Generated if the HPD pin goes from a high voltage to a low voltage.
Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN``
capability set. When open() is called, the HPD pin can be read and
if the HPD is low, then an initial event will be generated for that
filehandle.
* .. _`CEC-EVENT-PIN-HPD-HIGH`:
- ``CEC_EVENT_PIN_HPD_HIGH``
- 6
- Generated if the HPD pin goes from a low voltage to a high voltage.
Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN``
capability set. When open() is called, the HPD pin can be read and
if the HPD is high, then an initial event will be generated for that
filehandle.
* .. _`CEC-EVENT-PIN-5V-LOW`:
- ``CEC_EVENT_PIN_5V_LOW``
- 6
- Generated if the 5V pin goes from a high voltage to a low voltage.
Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN``
capability set. When open() is called, the 5V pin can be read and
if the 5V is low, then an initial event will be generated for that
filehandle.
* .. _`CEC-EVENT-PIN-5V-HIGH`:
- ``CEC_EVENT_PIN_5V_HIGH``
- 7
- Generated if the 5V pin goes from a low voltage to a high voltage.
Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN``
capability set. When open() is called, the 5V pin can be read and
if the 5V is high, then an initial event will be generated for that
filehandle.
.. tabularcolumns:: |p{6.0cm}|p{0.6cm}|p{10.9cm}|
.. _cec-event-flags:
.. flat-table:: CEC Event Flags
:header-rows: 0
:stub-columns: 0
:widths: 3 1 8
* .. _`CEC-EVENT-FL-INITIAL-STATE`:
- ``CEC_EVENT_FL_INITIAL_STATE``
- 1
- Set for the initial events that are generated when the device is
opened. See the table above for which events do this. This allows
applications to learn the initial state of the CEC adapter at
open() time.
* .. _`CEC-EVENT-FL-DROPPED-EVENTS`:
- ``CEC_EVENT_FL_DROPPED_EVENTS``
- 2
- Set if one or more events of the given event type have been dropped.
This is an indication that the application cannot keep up.
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.
The :ref:`ioctl CEC_DQEVENT <CEC_DQEVENT>` can return the following
error codes:
EAGAIN
This is returned when the filehandle is in non-blocking mode and there
are no pending events.
ERESTARTSYS
An interrupt (e.g. Ctrl-C) arrived while in blocking mode waiting for
events to arrive.
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View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _AUDIO_BILINGUAL_CHANNEL_SELECT:
==============================
AUDIO_BILINGUAL_CHANNEL_SELECT
==============================
Name
----
AUDIO_BILINGUAL_CHANNEL_SELECT
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int ioctl(int fd, AUDIO_BILINGUAL_CHANNEL_SELECT, struct *audio_channel_select)
:name: AUDIO_BILINGUAL_CHANNEL_SELECT
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
-
- int fd
- File descriptor returned by a previous call to open().
-
- audio_channel_select_t ch
- Select the output format of the audio (mono left/right, stereo).
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/media/uapi/dvb/audio-channel-select.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _AUDIO_CHANNEL_SELECT:
====================
AUDIO_CHANNEL_SELECT
====================
Name
----
AUDIO_CHANNEL_SELECT
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int ioctl(int fd, AUDIO_CHANNEL_SELECT, struct *audio_channel_select)
:name: AUDIO_CHANNEL_SELECT
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
-
- int fd
- File descriptor returned by a previous call to open().
-
- audio_channel_select_t ch
- Select the output format of the audio (mono left/right, stereo).
Description
-----------
This ioctl is for Digital TV 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/media/uapi/dvb/audio-clear-buffer.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _AUDIO_CLEAR_BUFFER:
==================
AUDIO_CLEAR_BUFFER
==================
Name
----
AUDIO_CLEAR_BUFFER
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int ioctl(int fd, AUDIO_CLEAR_BUFFER)
:name: AUDIO_CLEAR_BUFFER
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
- .. row 1
- int fd
- File descriptor returned by a previous call to open().
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/media/uapi/dvb/audio-continue.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _AUDIO_CONTINUE:
==============
AUDIO_CONTINUE
==============
Name
----
AUDIO_CONTINUE
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int ioctl(int fd, AUDIO_CONTINUE)
:name: AUDIO_CONTINUE
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
- .. row 1
- int fd
- File descriptor returned by a previous call to open().
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/media/uapi/dvb/audio-fclose.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _audio_fclose:
========================
Digital TV audio close()
========================
Name
----
Digital TV audio close()
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int close(int fd)
:name: dvb-audio-close
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
- .. row 1
- int fd
- File descriptor returned by a previous call to open().
Description
-----------
This system call closes a previously opened audio device.
Return Value
------------
.. flat-table::
:header-rows: 0
:stub-columns: 0
- .. row 1
- ``EBADF``
- fd is not a valid open file descriptor.
Documentation/media/uapi/dvb/audio-fopen.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _audio_fopen:
=======================
Digital TV audio open()
=======================
Name
----
Digital TV audio open()
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int open(const char *deviceName, int flags)
:name: dvb-audio-open
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
- .. row 1
- const char \*deviceName
- Name of specific audio device.
- .. row 2
- int flags
- A bit-wise OR of the following flags:
- .. row 3
-
- O_RDONLY read-only access
- .. row 4
-
- O_RDWR read/write access
- .. row 5
-
- O_NONBLOCK open in non-blocking mode
- .. row 6
-
- (blocking mode is the default)
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
------------
.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
- .. row 1
- ``ENODEV``
- Device driver not loaded/available.
- .. row 2
- ``EBUSY``
- Device or resource busy.
- .. row 3
- ``EINVAL``
- Invalid argument.
Documentation/media/uapi/dvb/audio-fwrite.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _audio_fwrite:
=========================
Digital TV audio write()
=========================
Name
----
Digital TV audio write()
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: size_t write(int fd, const void *buf, size_t count)
:name: dvb-audio-write
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
- .. row 1
- int fd
- File descriptor returned by a previous call to open().
- .. row 2
- void \*buf
- Pointer to the buffer containing the PES data.
- .. row 3
- size_t count
- Size of buf.
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
- .. row 1
- ``EPERM``
- Mode AUDIO_SOURCE_MEMORY not selected.
- .. row 2
- ``ENOMEM``
- Attempted to write more data than the internal buffer can hold.
- .. row 3
- ``EBADF``
- fd is not a valid open file descriptor.
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View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _AUDIO_GET_CAPABILITIES:
======================
AUDIO_GET_CAPABILITIES
======================
Name
----
AUDIO_GET_CAPABILITIES
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int ioctl(int fd, AUDIO_GET_CAPABILITIES, unsigned int *cap)
:name: AUDIO_GET_CAPABILITIES
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
-
- int fd
- File descriptor returned by a previous call to open().
-
- unsigned int \*cap
- Returns a bit array of supported sound formats.
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/media/uapi/dvb/audio-get-status.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _AUDIO_GET_STATUS:
================
AUDIO_GET_STATUS
================
Name
----
AUDIO_GET_STATUS
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int ioctl(int fd, AUDIO_GET_STATUS, struct audio_status *status)
:name: AUDIO_GET_STATUS
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
-
- int fd
- File descriptor returned by a previous call to open().
-
- struct audio_status \*status
- Returns the current state of Audio Device.
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/media/uapi/dvb/audio-pause.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _AUDIO_PAUSE:
===========
AUDIO_PAUSE
===========
Name
----
AUDIO_PAUSE
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int ioctl(int fd, AUDIO_PAUSE)
:name: AUDIO_PAUSE
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
- .. row 1
- int fd
- File descriptor returned by a previous call to open().
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/media/uapi/dvb/audio-play.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _AUDIO_PLAY:
==========
AUDIO_PLAY
==========
Name
----
AUDIO_PLAY
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int ioctl(int fd, AUDIO_PLAY)
:name: AUDIO_PLAY
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
- .. row 1
- int fd
- File descriptor returned by a previous call to open().
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/media/uapi/dvb/audio-select-source.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _AUDIO_SELECT_SOURCE:
===================
AUDIO_SELECT_SOURCE
===================
Name
----
AUDIO_SELECT_SOURCE
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int ioctl(int fd, AUDIO_SELECT_SOURCE, struct audio_stream_source *source)
:name: AUDIO_SELECT_SOURCE
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
-
- int fd
- File descriptor returned by a previous call to open().
-
- audio_stream_source_t source
- Indicates the source that shall be used for the Audio stream.
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/media/uapi/dvb/audio-set-av-sync.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _AUDIO_SET_AV_SYNC:
=================
AUDIO_SET_AV_SYNC
=================
Name
----
AUDIO_SET_AV_SYNC
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int ioctl(int fd, AUDIO_SET_AV_SYNC, boolean state)
:name: AUDIO_SET_AV_SYNC
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
-
- int fd
- File descriptor returned by a previous call to open().
-
- boolean state
- Tells the Digital TV subsystem if A/V synchronization shall be ON or OFF.
TRUE: AV-sync ON
FALSE: AV-sync OFF
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/media/uapi/dvb/audio-set-bypass-mode.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _AUDIO_SET_BYPASS_MODE:
=====================
AUDIO_SET_BYPASS_MODE
=====================
Name
----
AUDIO_SET_BYPASS_MODE
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int ioctl(int fd, AUDIO_SET_BYPASS_MODE, boolean mode)
:name: AUDIO_SET_BYPASS_MODE
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
-
- int fd
- File descriptor returned by a previous call to open().
-
- boolean mode
- Enables or disables the decoding of the current Audio stream in
the Digital TV subsystem.
TRUE: Bypass is disabled
FALSE: Bypass is enabled
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 Digital TV system shall be decoded. Dolby
DigitalTM streams are automatically forwarded by the Digital TV 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/media/uapi/dvb/audio-set-id.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _AUDIO_SET_ID:
============
AUDIO_SET_ID
============
Name
----
AUDIO_SET_ID
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int ioctl(int fd, AUDIO_SET_ID, int id)
:name: AUDIO_SET_ID
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
-
- int fd
- File descriptor returned by a previous call to open().
-
- int id
- audio sub-stream id
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/media/uapi/dvb/audio-set-mixer.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _AUDIO_SET_MIXER:
===============
AUDIO_SET_MIXER
===============
Name
----
AUDIO_SET_MIXER
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int ioctl(int fd, AUDIO_SET_MIXER, struct audio_mixer *mix)
:name: AUDIO_SET_MIXER
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
-
- int fd
- File descriptor returned by a previous call to open().
-
- audio_mixer_t \*mix
- mixer settings.
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/media/uapi/dvb/audio-set-mute.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _AUDIO_SET_MUTE:
==============
AUDIO_SET_MUTE
==============
Name
----
AUDIO_SET_MUTE
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int ioctl(int fd, AUDIO_SET_MUTE, boolean state)
:name: AUDIO_SET_MUTE
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
-
- int fd
- File descriptor returned by a previous call to open().
-
- boolean state
- Indicates if audio device shall mute or not.
TRUE: Audio Mute
FALSE: Audio Un-mute
Description
-----------
This ioctl is for Digital TV 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/media/uapi/dvb/audio-set-streamtype.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _AUDIO_SET_STREAMTYPE:
====================
AUDIO_SET_STREAMTYPE
====================
Name
----
AUDIO_SET_STREAMTYPE
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int ioctl(fd, AUDIO_SET_STREAMTYPE, int type)
:name: AUDIO_SET_STREAMTYPE
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
-
- int fd
- File descriptor returned by a previous call to open().
-
- int type
- stream type
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
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
.. flat-table::
:header-rows: 0
:stub-columns: 0
- .. row 1
- ``EINVAL``
- type is not a valid or supported stream type.
Documentation/media/uapi/dvb/audio-stop.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _AUDIO_STOP:
==========
AUDIO_STOP
==========
Name
----
AUDIO_STOP
.. attention:: This ioctl is deprecated
Synopsis
--------
.. c:function:: int ioctl(int fd, AUDIO_STOP)
:name: AUDIO_STOP
Arguments
---------
.. flat-table::
:header-rows: 0
:stub-columns: 0
- .. row 1
- int fd
- File descriptor returned by a previous call to open().
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/media/uapi/dvb/audio.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _dvb_audio:
#######################
Digital TV Audio Device
#######################
The Digital TV audio device controls the MPEG2 audio decoder of the Digital
TV hardware. It can be accessed through ``/dev/dvb/adapter?/audio?``. Data
types and and ioctl definitions can be accessed by including
``linux/dvb/audio.h`` in your application.
Please note that some Digital TV cards don’t have their own MPEG decoder, which
results in the omission of the audio and video device.
These ioctls were also used by V4L2 to control MPEG decoders implemented
in V4L2. The use of these ioctls for that purpose has been made obsolete
and proper V4L2 ioctls or controls have been created to replace that
functionality.
.. toctree::
:maxdepth: 1
audio_data_types
audio_function_calls
Documentation/media/uapi/dvb/audio_data_types.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _audio_data_types:
****************
Audio Data Types
****************
This section describes the structures, data types and defines used when
talking to the audio device.
.. c:type:: audio_stream_source
The audio stream source is set through the AUDIO_SELECT_SOURCE call
and can take the following values, depending on whether we are replaying
from an internal (demux) or external (user write) source.
.. code-block:: c
typedef enum {
AUDIO_SOURCE_DEMUX,
AUDIO_SOURCE_MEMORY
} audio_stream_source_t;
AUDIO_SOURCE_DEMUX selects the demultiplexer (fed either by the
frontend or the DVR device) as the source of the video stream. If
AUDIO_SOURCE_MEMORY is selected the stream comes from the application
through the ``write()`` system call.
.. c:type:: audio_play_state
The following values can be returned by the AUDIO_GET_STATUS call
representing the state of audio playback.
.. code-block:: c
typedef enum {
AUDIO_STOPPED,
AUDIO_PLAYING,
AUDIO_PAUSED
} audio_play_state_t;
.. c:type:: audio_channel_select
The audio channel selected via AUDIO_CHANNEL_SELECT is determined by
the following values.
.. code-block:: c
typedef enum {
AUDIO_STEREO,
AUDIO_MONO_LEFT,
AUDIO_MONO_RIGHT,
AUDIO_MONO,
AUDIO_STEREO_SWAPPED
} audio_channel_select_t;
.. c:type:: audio_status
The AUDIO_GET_STATUS call returns the following structure informing
about various states of the playback operation.
.. code-block:: c
typedef struct audio_status {
boolean AV_sync_state;
boolean mute_state;
audio_play_state_t play_state;
audio_stream_source_t stream_source;
audio_channel_select_t channel_select;
boolean bypass_mode;
audio_mixer_t mixer_state;
} audio_status_t;
.. c:type:: audio_mixer
The following structure is used by the AUDIO_SET_MIXER call to set the
audio volume.
.. code-block:: c
typedef struct audio_mixer {
unsigned int volume_left;
unsigned int volume_right;
} audio_mixer_t;
.. _audio_encodings:
audio encodings
===============
A call to AUDIO_GET_CAPABILITIES returns an unsigned integer with the
following bits set according to the hardwares capabilities.
.. code-block:: c
#define AUDIO_CAP_DTS 1
#define AUDIO_CAP_LPCM 2
#define AUDIO_CAP_MP1 4
#define AUDIO_CAP_MP2 8
#define AUDIO_CAP_MP3 16
#define AUDIO_CAP_AAC 32
#define AUDIO_CAP_OGG 64
#define AUDIO_CAP_SDDS 128
#define AUDIO_CAP_AC3 256
Documentation/media/uapi/dvb/audio_function_calls.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _audio_function_calls:
********************
Audio Function Calls
********************
.. toctree::
:maxdepth: 1
audio-fopen
audio-fclose
audio-fwrite
audio-stop
audio-play
audio-pause
audio-continue
audio-select-source
audio-set-mute
audio-set-av-sync
audio-set-bypass-mode
audio-channel-select
audio-bilingual-channel-select
audio-get-status
audio-get-capabilities
audio-clear-buffer
audio-set-id
audio-set-mixer
audio-set-streamtype
Documentation/media/uapi/dvb/ca-fclose.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _ca_fclose:
=====================
Digital TV CA close()
=====================
Name
----
Digital TV CA close()
Synopsis
--------
.. c:function:: int close(int fd)
:name: dvb-ca-close
Arguments
---------
``fd``
File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`.
Description
-----------
This system call closes a previously opened CA device.
Return Value
------------
On success 0 is returned.
On error -1 is returned, and the ``errno`` variable is set
appropriately.
Generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/media/uapi/dvb/ca-fopen.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _ca_fopen:
====================
Digital TV CA open()
====================
Name
----
Digital TV CA open()
Synopsis
--------
.. c:function:: int open(const char *name, int flags)
:name: dvb-ca-open
Arguments
---------
``name``
Name of specific Digital TV CA device.
``flags``
A bit-wise OR of the following flags:
.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 16
- - ``O_RDONLY``
- read-only access
- - ``O_RDWR``
- read/write access
- - ``O_NONBLOCK``
- open in non-blocking mode
(blocking mode is the default)
Description
-----------
This system call opens a named ca device (e.g. ``/dev/dvb/adapter?/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
------------
On success 0 is returned.
On error -1 is returned, and the ``errno`` variable is set
appropriately.
Generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Documentation/media/uapi/dvb/ca-get-cap.rst deleted 100644 → 0
View file @ 5dfb8db5
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _CA_GET_CAP:
==========
CA_GET_CAP
==========
Name
----
CA_GET_CAP
Synopsis
--------
.. c:function:: int ioctl(fd, CA_GET_CAP, struct ca_caps *caps)
:name: CA_GET_CAP
Arguments
---------
``fd``
File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`.
``caps``
Pointer to struct :c:type:`ca_caps`.
Description
-----------
Queries the Kernel for information about the available CA and descrambler
slots, and their types.
Return Value
------------
On success 0 is returned and :c:type:`ca_caps` is filled.
On error, -1 is returned and the ``errno`` variable is set
appropriately.
The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
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.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _CA_GET_DESCR_INFO:
=================
CA_GET_DESCR_INFO
=================
Name
----
CA_GET_DESCR_INFO
Synopsis
--------
.. c:function:: int ioctl(fd, CA_GET_DESCR_INFO, struct ca_descr_info *desc)
:name: CA_GET_DESCR_INFO
Arguments
---------
``fd``
File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`.
``desc``
Pointer to struct :c:type:`ca_descr_info`.
Description
-----------
Returns information about all descrambler slots.
Return Value
------------
On success 0 is returned, and :c:type:`ca_descr_info` is filled.
On error -1 is returned, and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
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.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _CA_GET_MSG:
==========
CA_GET_MSG
==========
Name
----
CA_GET_MSG
Synopsis
--------
.. c:function:: int ioctl(fd, CA_GET_MSG, struct ca_msg *msg)
:name: CA_GET_MSG
Arguments
---------
``fd``
File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`.
``msg``
Pointer to struct :c:type:`ca_msg`.
Description
-----------
Receives a message via a CI CA module.
.. note::
Please notice that, on most drivers, this is done by reading from
the /dev/adapter?/ca? device node.
Return Value
------------
On success 0 is returned.
On error -1 is returned, and the ``errno`` variable is set
appropriately.
Generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
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.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _CA_GET_SLOT_INFO:
================
CA_GET_SLOT_INFO
================
Name
----
CA_GET_SLOT_INFO
Synopsis
--------
.. c:function:: int ioctl(fd, CA_GET_SLOT_INFO, struct ca_slot_info *info)
:name: CA_GET_SLOT_INFO
Arguments
---------
``fd``
File descriptor returned by a previous call to :c:func:`open() <cec-open>`.
``info``
Pointer to struct :c:type:`ca_slot_info`.
Description
-----------
Returns information about a CA slot identified by
:c:type:`ca_slot_info`.slot_num.
Return Value
------------
On success 0 is returned, and :c:type:`ca_slot_info` is filled.
On error -1 is returned, and the ``errno`` variable is set
appropriately.
.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 16
- - ``ENODEV``
- the slot is not available.
The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
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.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _CA_RESET:
========
CA_RESET
========
Name
----
CA_RESET
Synopsis
--------
.. c:function:: int ioctl(fd, CA_RESET)
:name: CA_RESET
Arguments
---------
``fd``
File descriptor returned by a previous call to :c:func:`open() <cec-open>`.
Description
-----------
Puts the Conditional Access hardware on its initial state. It should
be called before start using the CA hardware.
Return Value
------------
On success 0 is returned.
On error -1 is returned, and the ``errno`` variable is set
appropriately.
Generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
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.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _CA_SEND_MSG:
===========
CA_SEND_MSG
===========
Name
----
CA_SEND_MSG
Synopsis
--------
.. c:function:: int ioctl(fd, CA_SEND_MSG, struct ca_msg *msg)
:name: CA_SEND_MSG
Arguments
---------
``fd``
File descriptor returned by a previous call to :c:func:`open() <cec-open>`.
``msg``
Pointer to struct :c:type:`ca_msg`.
Description
-----------
Sends a message via a CI CA module.
.. note::
Please notice that, on most drivers, this is done by writing
to the /dev/adapter?/ca? device node.
Return Value
------------
On success 0 is returned.
On error -1 is returned, and the ``errno`` variable is set
appropriately.
Generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
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.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _CA_SET_DESCR:
============
CA_SET_DESCR
============
Name
----
CA_SET_DESCR
Synopsis
--------
.. c:function:: int ioctl(fd, CA_SET_DESCR, struct ca_descr *desc)
:name: CA_SET_DESCR
Arguments
---------
``fd``
File descriptor returned by a previous call to :c:func:`open() <cec-open>`.
``msg``
Pointer to struct :c:type:`ca_descr`.
Description
-----------
CA_SET_DESCR is used for feeding descrambler CA slots with descrambling
keys (referred as control words).
Return Value
------------
On success 0 is returned.
On error -1 is returned, and the ``errno`` variable is set
appropriately.
Generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
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.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _dvb_ca:
####################
Digital TV CA Device
####################
The Digital TV CA device controls the conditional access hardware. It
can be accessed through ``/dev/dvb/adapter?/ca?``. Data types and and ioctl
definitions can be accessed by including ``linux/dvb/ca.h`` in your
application.
.. note::
There are three ioctls at this API that aren't documented:
:ref:`CA_GET_MSG`, :ref:`CA_SEND_MSG` and :ref:`CA_SET_DESCR`.
Documentation for them are welcome.
.. toctree::
:maxdepth: 1
ca_data_types
ca_function_calls
ca_high_level
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.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _ca_data_types:
*************
CA Data Types
*************
.. kernel-doc:: include/uapi/linux/dvb/ca.h
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.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _ca_function_calls:
*****************
CA Function Calls
*****************
.. toctree::
:maxdepth: 1
ca-fopen
ca-fclose
ca-reset
ca-get-cap
ca-get-slot-info
ca-get-descr-info
ca-get-msg
ca-send-msg
ca-set-descr
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.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _dvb_demux:
#######################
Digital TV Demux Device
#######################
The Digital TV demux device controls the MPEG-TS filters for the
digital TV. If the driver and hardware supports, those filters are
implemented at the hardware. Otherwise, the Kernel provides a software
emulation.
It can be accessed through ``/dev/adapter?/demux?``. Data types and and
ioctl definitions can be accessed by including ``linux/dvb/dmx.h`` in
your application.
.. toctree::
:maxdepth: 1
dmx_types
dmx_fcalls
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.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _DMX_ADD_PID:
===========
DMX_ADD_PID
===========
Name
----
DMX_ADD_PID
Synopsis
--------
.. c:function:: int ioctl(fd, DMX_ADD_PID, __u16 *pid)
:name: DMX_ADD_PID
Arguments
---------
``fd``
File descriptor returned by :c:func:`open() <dvb-dmx-open>`.
``pid``
PID number to be filtered.
Description
-----------
This ioctl call allows to add multiple PIDs to a transport stream filter
previously set up with :ref:`DMX_SET_PES_FILTER` and output equal to
:c:type:`DMX_OUT_TSDEMUX_TAP <dmx_output>`.
Return Value
------------
On success 0 is returned.
On error -1 is returned, and the ``errno`` variable is set
appropriately.
Generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
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.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _DMX_EXPBUF:
****************
ioctl DMX_EXPBUF
****************
Name
====
DMX_EXPBUF - Export a buffer as a DMABUF file descriptor.
.. warning:: this API is still experimental
Synopsis
========
.. c:function:: int ioctl( int fd, DMX_EXPBUF, struct dmx_exportbuffer *argp )
:name: DMX_EXPBUF
Arguments
=========
``fd``
File descriptor returned by :ref:`open() <dmx_fopen>`.
``argp``
Pointer to struct :c:type:`dmx_exportbuffer`.
Description
===========
This ioctl is an extension to the memory mapping I/O method.
It can be used to export a buffer as a DMABUF file at any time after
buffers have been allocated with the :ref:`DMX_REQBUFS` ioctl.
To export a buffer, applications fill struct :c:type:`dmx_exportbuffer`.
Applications must set the ``index`` field. Valid index numbers
range from zero to the number of buffers allocated with :ref:`DMX_REQBUFS`
(struct :c:type:`dmx_requestbuffers` ``count``) minus one.
Additional flags may be posted in the ``flags`` field. Refer to a manual
for open() for details. Currently only O_CLOEXEC, O_RDONLY, O_WRONLY,
and O_RDWR are supported.
All other fields must be set to zero. In the
case of multi-planar API, every plane is exported separately using
multiple :ref:`DMX_EXPBUF` calls.
After calling :ref:`DMX_EXPBUF` the ``fd`` field will be set by a
driver, on success. This is a DMABUF file descriptor. The application may
pass it to other DMABUF-aware devices. It is recommended to close a DMABUF
file when it is no longer used to allow the associated memory to be reclaimed.
Examples
========
.. code-block:: c
int buffer_export(int v4lfd, enum dmx_buf_type bt, int index, int *dmafd)
{
struct dmx_exportbuffer expbuf;
memset(&expbuf, 0, sizeof(expbuf));
expbuf.type = bt;
expbuf.index = index;
if (ioctl(v4lfd, DMX_EXPBUF, &expbuf) == -1) {
perror("DMX_EXPBUF");
return -1;
}
*dmafd = expbuf.fd;
return 0;
}
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.
EINVAL
A queue is not in MMAP mode or DMABUF exporting is not supported or
``flags`` or ``index`` fields are invalid.
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.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _dmx_fclose:
========================
Digital TV demux close()
========================
Name
----
Digital TV demux close()
Synopsis
--------
.. c:function:: int close(int fd)
:name: dvb-dmx-close
Arguments
---------
``fd``
File descriptor returned by a previous call to
:c:func:`open() <dvb-dmx-open>`.
Description
-----------
This system call deactivates and deallocates a filter that was
previously allocated via the :c:func:`open() <dvb-dmx-open>` call.
Return Value
------------
On success 0 is returned.
On error, -1 is returned and the ``errno`` variable is set
appropriately.
The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
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.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _DMX_STOP:
========
DMX_STOP
========
Name
----
DMX_STOP
Synopsis
--------
.. c:function:: int ioctl( int fd, DMX_STOP)
:name: DMX_STOP
Arguments
---------
``fd``
File descriptor returned by :c:func:`open() <dvb-dmx-open>`.
Description
-----------
This ioctl call is used to stop the actual filtering operation defined
via the ioctl calls :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER` and
started via the :ref:`DMX_START` command.
Return Value
------------
On success 0 is returned.
On error -1 is returned, and the ``errno`` variable is set
appropriately.
The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
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