Difference between revisions of "Software architecture"
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[[Software architecture]] | | [[Software architecture]] | | ||
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| + | == Background == | ||
| + | I (Andrey Filippov) quit my job and started Elphel, Inc. in 2001 (Magna, UT USA), all the projects were covered in [http://www.linuxdevices.com LinuxDevices] (complete list on the articles is available [http://www.elphel.com/articles/index.html here]). For several years Elphel was a one-man company, in January 2004 I wrote an article [http://www.computerra.ru/hitech/tech/31862/ Taming of the Iron Penguin (Russian)] in the largest Russain computer-related magazine [http://www.computerra.ru Computerra] and announced there a competition among the software developers for the best video steramer to run in the camera. That was a good idea and after the competition itself was over most of the developers remained in the Elphel team. At first - as volunteers, later - as full/part time employees. | ||
| + | |||
| + | Not all of these developers live in Russia - two, including the winner of the competition are from Kiev, Ukraine. But still all of them know Russian much better than English and so most of our technical discussions were on our private Russian-language forum. So far I failed to move these discussions to the broader audience but believe that Wiki technology can help. Here we will mantain most of the site in English but still have some pages/discussions in Russian, translating documents as we go. Or when somebody else needs it and is not satisfied with [http://babelfish.altavista.com Babelfish] automatic translation. We will try to keep English pages current - anyway even in Elphel not everybody knows Russian. | ||
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| + | Please excuse not-so-good English of our developers and feel free to fix the errors if you see them. | ||
| + | |||
| + | == Software Architecture of Elphel 3x3 cameras == | ||
Software in the Elphel cameras started from [http://developer.axis.com/ Axis Developer Boards Software] and was amended for the camera specific functions. It was modified to work with newer hardware (models 303-313/323-333), support more features and now it seems to be a good time to make a major redesign instead of applying incremental changes. | Software in the Elphel cameras started from [http://developer.axis.com/ Axis Developer Boards Software] and was amended for the camera specific functions. It was modified to work with newer hardware (models 303-313/323-333), support more features and now it seems to be a good time to make a major redesign instead of applying incremental changes. | ||
Some discussion already started in Russian here - [[Nc3x3]] | Some discussion already started in Russian here - [[Nc3x3]] | ||
| − | Related to the architecture are the [[Camera Interface]] and the [[Client Software]] | + | Related to the architecture are the [[#Camera Interface]] and the [[#Client Software]] |
| + | === Camera Interface === | ||
| + | |||
| + | === Client Software === | ||
| + | |||
| + | === Video Server === | ||
| + | PC-based video server that will archive incoming Ogg Theora incoming streams from several cameras and transcode them on the fly to lower resolution (binary decimation, windowing) and frame rate (i.e. using only key frames) presenting multiple streams (real time and recorded) to the operator. The external interface of the server might be one of the industry standard and compatible with 3-rd party legacy software. | ||
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''Free Software and Open Hardware. Elphel, Inc., 2005'' | ''Free Software and Open Hardware. Elphel, Inc., 2005'' | ||
Revision as of 13:52, 22 September 2005
Elphel Network Cameras Manual
Using the cameras | Camera software | Camera hardware | Diagnostic and repair | Development documentation | Information | Glossary | About Elphel, Inc
Software architecture | Empty | Empty | Empty
Contents
Background
I (Andrey Filippov) quit my job and started Elphel, Inc. in 2001 (Magna, UT USA), all the projects were covered in LinuxDevices (complete list on the articles is available here). For several years Elphel was a one-man company, in January 2004 I wrote an article Taming of the Iron Penguin (Russian) in the largest Russain computer-related magazine Computerra and announced there a competition among the software developers for the best video steramer to run in the camera. That was a good idea and after the competition itself was over most of the developers remained in the Elphel team. At first - as volunteers, later - as full/part time employees.
Not all of these developers live in Russia - two, including the winner of the competition are from Kiev, Ukraine. But still all of them know Russian much better than English and so most of our technical discussions were on our private Russian-language forum. So far I failed to move these discussions to the broader audience but believe that Wiki technology can help. Here we will mantain most of the site in English but still have some pages/discussions in Russian, translating documents as we go. Or when somebody else needs it and is not satisfied with Babelfish automatic translation. We will try to keep English pages current - anyway even in Elphel not everybody knows Russian.
Please excuse not-so-good English of our developers and feel free to fix the errors if you see them.
Software Architecture of Elphel 3x3 cameras
Software in the Elphel cameras started from Axis Developer Boards Software and was amended for the camera specific functions. It was modified to work with newer hardware (models 303-313/323-333), support more features and now it seems to be a good time to make a major redesign instead of applying incremental changes.
Some discussion already started in Russian here - Nc3x3
Related to the architecture are the #Camera Interface and the #Client Software
Camera Interface
Client Software
Video Server
PC-based video server that will archive incoming Ogg Theora incoming streams from several cameras and transcode them on the fly to lower resolution (binary decimation, windowing) and frame rate (i.e. using only key frames) presenting multiple streams (real time and recorded) to the operator. The external interface of the server might be one of the industry standard and compatible with 3-rd party legacy software.
Free Software and Open Hardware. Elphel, Inc., 2005
