mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
46 lines
1.9 KiB
46 lines
1.9 KiB
.. SPDX-License-Identifier: GPL-2.0 |
|
|
|
============ |
|
Introduction |
|
============ |
|
|
|
This document covers the Linux Kernel to Userspace API's used by video |
|
and radio streaming devices, including video cameras, analog and digital |
|
TV receiver cards, AM/FM receiver cards, Software Defined Radio (SDR), |
|
streaming capture and output devices, codec devices and remote controllers. |
|
|
|
A typical media device hardware is shown at :ref:`typical_media_device`. |
|
|
|
.. _typical_media_device: |
|
|
|
.. kernel-figure:: typical_media_device.svg |
|
:alt: typical_media_device.svg |
|
:align: center |
|
|
|
Typical Media Device |
|
|
|
The media infrastructure API was designed to control such devices. It is |
|
divided into five parts. |
|
|
|
1. The :ref:`first part <v4l2spec>` covers radio, video capture and output, |
|
cameras, analog TV devices and codecs. |
|
|
|
2. The :ref:`second part <dvbapi>` covers the API used for digital TV and |
|
Internet reception via one of the several digital tv standards. While it is |
|
called as DVB API, in fact it covers several different video standards |
|
including DVB-T/T2, DVB-S/S2, DVB-C, ATSC, ISDB-T, ISDB-S, DTMB, etc. The |
|
complete list of supported standards can be found at |
|
:c:type:`fe_delivery_system`. |
|
|
|
3. The :ref:`third part <remote_controllers>` covers the Remote Controller API. |
|
|
|
4. The :ref:`fourth part <media_controller>` covers the Media Controller API. |
|
|
|
5. The :ref:`fifth part <cec>` covers the CEC (Consumer Electronics Control) API. |
|
|
|
It should also be noted that a media device may also have audio components, like |
|
mixers, PCM capture, PCM playback, etc, which are controlled via ALSA API. For |
|
additional information and for the latest development code, see: |
|
`https://linuxtv.org <https://linuxtv.org>`__. For discussing improvements, |
|
reporting troubles, sending new drivers, etc, please mail to: `Linux Media |
|
Mailing List (LMML) <http://vger.kernel.org/vger-lists.html#linux-media>`__.
|
|
|