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Niklas Söderlund 3de65b43a6 libcamera: pipelines: Align bookkeeping in queueRequest()
Expecting pipeline handler implementations of queueRequest() to call
the base class queueRequest() at the correct point have led to different
behaviors between the pipelines.

Fix this by splitting queueRequest() into a base class implementation
which handles the bookkeeping and a new queueRequestDevice() that is
to be implemented by pipeline handlers and only deals with committing the
request to the device.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-12-16 13:39:22 +01:00
Documentation ipa: Switch to the plain C API 2019-11-20 21:48:00 +02:00
include include: linux: Update Linux headers readme to v5.2 2019-12-08 23:59:25 -05:00
licenses licenses: add Apache-2.0 license 2019-08-12 10:34:13 +02:00
package/gentoo/media-libs/libcamera libcamera: controls: Auto-generate control_ids.h and control_ids.cpp 2019-10-05 20:02:51 +03:00
src libcamera: pipelines: Align bookkeeping in queueRequest() 2019-12-16 13:39:22 +01:00
test test: object-invoke: Delete InvokeObject after thread termination 2019-11-27 19:31:21 +02:00
utils utils: checkstyle.py: Add include checker 2019-10-23 17:12:34 +03:00
.clang-format clang-format: Don't indent namespaces 2019-09-23 09:50:08 +03:00
.gitignore git: Add .gitignore file 2018-12-14 13:23:07 +00:00
meson.build libcamera: Print backtrace on fatal errors 2019-11-26 18:47:15 +02:00
meson_options.txt meson: Rename 'tests' option to 'test' 2019-08-22 19:35:54 +03:00
README.rst README: Simplify a bit the build instructions 2019-11-18 02:28:55 +02:00

.. section-begin-libcamera

===========
 libcamera
===========

**A complex camera support library for Linux, Android, and ChromeOS**

Cameras are complex devices that need heavy hardware image processing
operations. Control of the processing is based on advanced algorithms that must
run on a programmable processor. This has traditionally been implemented in a
dedicated MCU in the camera, but in embedded devices algorithms have been moved
to the main CPU to save cost. Blurring the boundary between camera devices and
Linux often left the user with no other option than a vendor-specific
closed-source solution.

To address this problem the Linux media community has very recently started
collaboration with the industry to develop a camera stack that will be
open-source-friendly while still protecting vendor core IP. libcamera was born
out of that collaboration and will offer modern camera support to Linux-based
systems, including traditional Linux distributions, ChromeOS and Android.

.. section-end-libcamera
.. section-begin-getting-started

Getting Started
---------------

To fetch the sources, build and install:

::

  git clone git://linuxtv.org/libcamera.git
  cd libcamera
  meson build
  ninja -C build install

Dependencies
~~~~~~~~~~~~

The following Debian/Ubuntu packages are required for building libcamera.
Other distributions may have differing package names:

A C++ toolchain: [required]
	Either {g++, clang}

for libcamera: [required]
	meson ninja-build python3-yaml

for device hotplug enumeration: [optional]
	pkg-config libudev-dev

for qcam: [optional]
	qtbase5-dev libqt5core5a libqt5gui5 libqt5widgets5

for documentation: [optional]
	python3-sphinx doxygen

.. section-end-getting-started