Laurent Pinchart
6d2411fcb7
To bring the libcamera and V4L2 control info maps closer, index the latter by ControlId * like the former. As V4L2ControlInfoMap is widely indexed by V4L2 numerical IDs, add accessors based on numerical IDs. This allows complete removal of the ControId pointer from the V4L2ControlInfo, as the ControId is accessible as the key when iterating over the map. A handful of users have to be modified to adapt to the change. The controlInfo argument from V4L2Device::updateControls() can also be removed as it itsn't used anymore. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
===========
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.
Getting Started
---------------
To build and install:
::
meson build
cd build
ninja
ninja 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