Ports 搜索

surf is a tool to visualize some real algebraic geometry: plane algebraic curves, algebraic surfaces and hyperplane sections of surfaces. surf is script driven and has (optionally) a nifty GUI using the Gtk widget set. The algorithms should be stable enough not to be confused by curve/surface singularities in codimension greater than one and the degree of the surface or curve. This has been achieved quite a bit. We have drawn curves of degree up to 30 and surfaces of degree up to 20 successfully. However, there are examples of curves/surfaces of lower degree where surf fails to produce perfect images. This happens especially if the equation of the curve/surface is not reduced. Best results are achieved using reduced equations. On the other hand, surf displays the Fermat-curves accurately for degree up to 98.

The Visualization Toolkit (VTK) is an open-source, freely available software system for 3D computer graphics, image processing and visualization. VTK consists of a C++ class library and several interpreted interface layers including Tcl/Tk, Java, and Python. Kitware, whose team created and continues to extend the toolkit, offers professional support and consulting services for VTK. VTK supports a wide variety of visualization algorithms including: scalar, vector, tensor, texture, and volumetric methods; and advanced modeling techniques such as: implicit modeling, polygon reduction, mesh smoothing, cutting, contouring, and Delaunay triangulation. VTK has an extensive information visualization framework, has a suite of 3D interaction widgets, supports parallel processing, and integrates with various databases on GUI toolkits such as Qt and Tk.

Gmerlin_avdecoder is a general purpose media decoding library. It was written as a support library for gmerlin, but it can also be used by other applications. You don't even need gmerlin installed, only gavl. Most of it was written completely from scratch, but the sourcetrees of some other great software packages were used as reference documentation. Credits go to the authors of Xine, MPlayer, quicktime4linux and ffmpeg. Gmerlin_avdecoder is one of the most complete general purpose media decoding libraries. The supported formats and codecs span a wide range of applications from consumer level (mp3, divx etc.) to high end production formats like 32 bit PCM and some professional uncompressed video codecs. Using gmerlin_avdecoder in your playback for transcoding application means rock solid media format support with an ever growing list of supported codecs and formats.

iso2mkv is software for automated DVD to XviD/vorbis MKV video conversion. Gives almost total control on the process of video compression at maximum quality, while being simple and straightforward to use (a kind of 'life-hack'). The intended audience is advanced end-users and the script is not user-error-proof. Based on mplayer, mencoder, oggenc or lame, and mkvmerge (if not properly installed, won't work). This is only a shell script that wraps the other programs. If you can watch the DVD with MPlayer, you can compress it with iso2mkv. Other used programs (hopefully included in most GNU/Linux distributions as well a FreeBSD :) ) are basename, bc, nice, stat.

libv4l is a collection of libraries which adds a thin abstraction layer on top of video4linux2 devices. The purpose of this (thin) layer is to make it easy for application writers to support a wide variety of devices without having to write separate code for different devices in the same class. libv4l consists of 3 different libraries: libv4lconvert, libv4l1 and libv4l2. libv4lconvert offers functions to convert from any (known) pixel-format to V4l2_PIX_FMT_BGR24 or V4l2_PIX_FMT_YUV420. libv4l1 offers the (deprecated) v4l1 API on top of v4l2 devices, independent of the drivers for those devices supporting v4l1 compatibility (which many v4l2 drivers do not). libv4l2 offers the v4l2 API on top of v4l2 devices, while adding for the application transparent libv4lconvert conversion where necessary.

libv4l is a collection of libraries which adds a thin abstraction layer on top of video4linux2 devices. The purpose of this (thin) layer is to make it easy for application writers to support a wide variety of devices without having to write separate code for different devices in the same class. libv4l consists of 3 different libraries: libv4lconvert, libv4l1 and libv4l2. libv4lconvert offers functions to convert from any (known) pixel-format to V4l2_PIX_FMT_BGR24 or V4l2_PIX_FMT_YUV420. libv4l1 offers the (deprecated) v4l1 API on top of v4l2 devices, independent of the drivers for those devices supporting v4l1 compatibility (which many v4l2 drivers do not). libv4l2 offers the v4l2 API on top of v4l2 devices, while adding for the application transparent libv4lconvert conversion where necessary.

SMPEG is a free MPEG1 video player library with sound support. Video playback is based on the ubiquitous Berkeley MPEG player, mpeg_play v2.2. Audio is played through a slightly modified mpegsound library, part of Splay v0.8.2. SMPEG supports MPEG audio (MP3), MPEG-1 video, and MPEG system streams. plaympeg, gtv, and glmovie are simple video players provided to test the library. The C library interface is 'documented' in smpeg.h, and the C++ library interface is spread out over the MPEG*.h files. This is a work in progress. Only 16 bit color depth is supported. The player will dynamically conver to other color depths, but playback will be much faster if your display is already set to 16 bit color depth.

SMPEG is a free MPEG1 video player library with sound support. Video playback is based on the ubiquitous Berkeley MPEG player, mpeg_play v2.2. Audio is played through a slightly modified mpegsound library, part of Splay v0.8.2. SMPEG supports MPEG audio (MP3), MPEG-1 video, and MPEG system streams. plaympeg is simple video players provided to test the library. The C library interface is 'documented' in smpeg.h, and the C++ library interface is spread out over the MPEG*.h files. This is a work in progress. Only 16 or 32 bit color depth is supported. The player will dynamically convert to other color depths, but playback will be much faster if your display is already set to 16 bit color depth.

Convey allows people across the globe to collaboratively draw images while chatting online. Using pictures in addition to words makes communicating online fun and easy. Convey is an Instant Message (IM) program. You can send an message to a friend, but unlike email, the message instantly appears on your friend's screen if they are online. Otherwise, the message is delivered to your friend when they log onto the Internet. Convey uses the Jabber protocol to send its messages. A protocol consists of the rules by which a computer communicates with another computer. Using Jabber, Convey provides users connections to other popular IM programs, such as AOL Instant Messenger, ICQ, MSN Instant Messenger, and Yahoo! Messenger.

ejabberd is a high performance Free and Open Source distributed fault-tolerant instant messaging Jabber server. Key features include: - A web administration console and command line administration tools that ensure easy set up - Support for encrypted connections to ensure secure communications - Many built-in services, including Jabber User Directory and Multi-User Chat - Standard Jabber transport compliance to enable communication with other instant messaging networks - Automatic collection of statistics for reporting and system analysis - Virtual hosting, enabling ejabberd to run several virtual domains from a single ejabberd instance - Shared rosters, so that users can have predefined entries in their contacts lists - External storage support - Large numbers of supported protocols (see the supported protocols list for details) - Multi-lingual web administration interface - Full IPv6 support