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It's common for applications to create and queue a new request in a previous request completion handler. When the new request gets queued to the RkISP1 pipeline handler it tries to find a parameters and statistic buffer to be used with the request. The problem is if the pipeline depth is already filled there are no internal buffers free to be used by the new request. This was solved by allocation one more parameters and statistic buffer then the pipeline depth, this is waste full. Instead free the resources of the request that has completed before it is signaled to the application, this way if the pipeline depth is full it can reuse the internal resources and the wasteful allocation can be removed. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> |
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README.rst |
.. 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