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OpenMAX (Open Media Acceleration)

OpenMAX (Open Media Acceleration) is a royalty-free, cross-platform set of C-language programming interfaces that provides abstractions for routines especially useful for audio, video, and still images. OpenMAX standard is managed by the non-profit technology consortium Khronos Group. OpenMAX allows developers to take advantages of hardware media decoding/encoding. For example, If you want to play video using Raspberry Pi hardware (VideoCore IV GPU in Broadcom BCM2835) you’ll have to use OpenMAX IL. OpenMAX provides three layers of interfaces: Application Layer (AL): Open standard for accelerating the capture, and presentation of audio, video, and images in multimedia applications on embedded and mobile devices. Integration Layer (IL) : API defining a standardized media component interface to enable developers and platform providers to integrate and communicate with multimedia codecs implemented in hardware or software. Development Layer (DL): APIs containing a comprehensive set of audio, video and imaging functions that can be implemented and optimized […]

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Linaro’s Android Platform – ELCE 2011

Zach Pfeffer, Linaro Android Platform team leader, describes Linaro’s work on the Android platform and future plans at Embedded Linux Conference Europe 2011. Abstract: Linaro uses components from the Android Open Source Project, member companies, community supported efforts and Linaro engineering teams to build integrated, easy-to-use and well tested Android platforms for upstream work, product baselines and hobby projects. The team currently has platforms for TIs PandaBoard, BeagleBoard and Beagle xM, ST Ericsson’s Snowball, Samsung’s Origen and Freescale’s iMX53. They recently released platforms with Android 2.3.4 built against GCC 4.6 and running the 3.0 Linux kernel. In this session Zach reviews what’s been done, the Linaro Android concept, how Linaro brings Android together and what their plans are.

Khadas Edge2 Arm mini PC
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Device Tree Status Report – ELCE 2011

Grant Likely, owner at Secret Lab Technology, describe the current status of device tree (used to resolve ARM “hodgepodge” issue) and provides an example at Embedded Linux Conference Europe 2011. Abstract: In recent years, Linux has enjoyed immense success in the embedded market, and we’ve seen an explosion in the number of devices supported by the mainline Linux kernel. Traditionally, however, adding support for another embedded machine typically involved adding yet another board.c file to the kernel which more often than not was simply cut and paste from a similar board. As a result, board support code contains a huge amount of duplication and has become so huge that it is becoming unmaintainable. To move away from individual board files, several architectures have adopted the Device Tree method of encoding the hardware details into a data structure which can be parsed by generic initialization code and device drivers. This session […]

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Energy Efficiency of ARM Architecture for Cloud Computing Applications

Following “Pandaboard Cloud Cluster Running Google App Engine” post, there were some questions regarding the actual power efficiency of ARM servers vs Intel (Xeon) servers and some commenters questioned the performance of ARM chips. I’ve found a thesis evaluating how the energy efficiency of the ARMv7 architecture based processors Cortex-A9 and Cortex-A8 compares – in applications such as a SIP Proxy and a web server (Apache2) – to Intel Xeon processors. The focus of this thesis is to compare the energy efficiency between the two architectures rather than pure performance where the Xeon largely outperforms ARM processors, although a cluster of ARM servers could be used instead to reach the same processing power. Depending on the application, benchmarks indicate energy efficiency of 3-11 times greater for the ARM Cortex-A9 in comparison to the Intel Xeon. The full thesis (74 pages) is available below.

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Ubuntu Linaro Evaluation Builds (LEB) Tutorial

Ricardo Salveti, tech lead of the Developer Platform working group, gave a tutorial on the Ubuntu Linaro Evaluation Builds (LEBs) during Linaro Connect Q4.11. He first described the list of available images: nano – minimal rootfs (command line) with apt/dkpg support ALIP – nano + X11 + browser Developer – nano + development tools Ubuntu Desktop – clone of Ubuntu with Linaro modifications. and how the builds are made available via nightly builds and hardware packs. Linaro aims at making Ubuntu the reference Linux distribution for ARM. This goal is valid for Cortex A processors, but for older ARM core (ARM9/ARM11) other distributions will have to used such as Debian. For example, Raspberry Pi board (ARM1176) will support Fedora optimized by Redhat. He then gave further details on Offspring the Linaro build system based on live-build scripts used for Debian. The source code is retrieved either via git (http:/git.linaro.org) or launchpad […]

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All You Need to Create a Beaglebone Clone

The Beagleboard community has released Beaglebone Rev 3 hardware design files so that other people can now modify the hardware and/or create a clone. Here are the files: Schematics (PDF) Schematics (Orcad) [update] Bill of materials Gerber files Allegro files (PCB layout) System Reference Manual [update] To open Allegro files, you’ll need to download Cadence Allegro FREE Viewer or purchase one of Cadence PCB Design software if you don’t have it yet. The schematics are only provided in PDF format for now, so you would be able to modify them unless you reproduce the PDF one. Since TI has now released the Orcad schematics you’d also be able to make a custom board by modifying the schematics. Please note that those files comes with the following disclaimer: These design materials are *NOT SUPPORTED* and DO NOT constitute a reference design. THERE IS NO WARRANTY FOR THE DESIGN MATERIALS, TO THE […]

AAEON Intel Arc
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Linaro 11.10 Release with Linux Kernel 3.1

Linaro has just released version 11.10 based on Linux Kernel 3.1. Here are the highlights of the release: Android Audio playback and recording works on LEB-panda. TJBench into all Android builds benchmarked against the original Android libjpeg implementation: TomGall/LibJpegTurbo All strict-aliasing violations in 2.3.5 have been fixed and sent to AOSP. (for build optimization) Linaro Gerrit is integrated with Android Build Service for change verification as part of Continuous Integration effort. Tip toolchain tracked and released against all targets for 11.10. iMX53 will now boot with a 3.0 or later Android Kernel. The multimedia test application has been extended to cover encoding and give better benchmark results. Linaro’s Android distribution can now base builds off a tip toolchain build. Linaro’s 11.09 toolchain has been benchmarked. USB camera (UVC) now works on linaro-android builds. Developer Platform The Linux Linaro packages are now generated and validated in a continuous integration loop. New […]

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Xibo Digital Signage on ARM (Full Version)

Last month, I wrote a post showing how to run Xibo Open Source Digital Signage in a BeagleBoard/Overo emulator. That version could communicate with Xibo server, download the required files, display pictures and (maybe) play videos with the real hardware. However, it had serious limitation as Text, RSS and web pages could not be displayed. I’ve now fixed those issues and the full Xibo 1.3.1 can run on ARM platform. First, you need to follow the instructions given in Xibo Digital Signage on ARM (Beagleboard / Overo), although we’ll need to modify something with libavg compilation (see below). Then cross-compile berkelium for ARM using Linaro toolchain. Add libbrowser-node to libavg plugin directory and build libavg again. Also copy the Berkelium header files in to src/test/plugin (i.e. src/test/plugin/berkelium) or add the include file path to CFLAGS/CXXFLAGS.

Create libberkeliumwrapper.so:

Copy the required files to the qemu image: sudo mount -o […]

Khadas VIM4 SBC