| .. -*- coding: utf-8; mode: rst -*- |
| |
| .. _common: |
| |
| ################### |
| Common API Elements |
| ################### |
| Programming a V4L2 device consists of these steps: |
| |
| - Opening the device |
| |
| - Changing device properties, selecting a video and audio input, video |
| standard, picture brightness a. o. |
| |
| - Negotiating a data format |
| |
| - Negotiating an input/output method |
| |
| - The actual input/output loop |
| |
| - Closing the device |
| |
| In practice most steps are optional and can be executed out of order. It |
| depends on the V4L2 device type, you can read about the details in |
| :ref:`devices`. In this chapter we will discuss the basic concepts |
| applicable to all devices. |
| |
| |
| .. toctree:: |
| :maxdepth: 1 |
| |
| open |
| querycap |
| app-pri |
| video |
| audio |
| tuner |
| standard |
| dv-timings |
| controls |
| format |
| planar-apis |
| crop |
| selection-api |
| streaming-par |
| |
| |
| |
| |
| .. ------------------------------------------------------------------------------ |
| .. This file was automatically converted from DocBook-XML with the dbxml |
| .. library (https://github.com/return42/sphkerneldoc). The origin XML comes |
| .. from the linux kernel, refer to: |
| .. |
| .. * https://github.com/torvalds/linux/tree/master/Documentation/DocBook |
| .. ------------------------------------------------------------------------------ |