diff options
| author | Hans-Christoph Steiner <eighthave@users.sourceforge.net> | 2005-12-15 07:41:49 +0000 |
|---|---|---|
| committer | Hans-Christoph Steiner <eighthave@users.sourceforge.net> | 2005-12-15 07:41:49 +0000 |
| commit | c3f5ea53917dea9c80751ee5809c7455589888be (patch) | |
| tree | dc317bccff92e459c51102a655ec708d8ce0ac67 /doc/misc/overview.html | |
| parent | 37b6643df2df7d784a31ca73f7bb90dc109c2401 (diff) | |
oops, mixed a few
svn path=/trunk/externals/pdp/; revision=4218
Diffstat (limited to 'doc/misc/overview.html')
| -rw-r--r-- | doc/misc/overview.html | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/doc/misc/overview.html b/doc/misc/overview.html deleted file mode 100644 index 6eb0e70..0000000 --- a/doc/misc/overview.html +++ /dev/null @@ -1,102 +0,0 @@ -<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> -<html><head><title>Pure Data Packet</title></head> -<body> - -<h1>Pure Data Packet</h1> - - -<h2>Introduction</h2> - -<p>Pure Data Packet (PDP) is an extension library for the computer music -program <a href="http://www.pure-data.org">Pure Data</a> (PD), by <a href = -"http://www-crca.ucsd.edu/~msp/software.html">Miller Puckette</a> and -others. Its goal is to provide a way to use arbitrary data types (data -packets) as messages that can be passed around inside PD, along side the -standard PD numbers and symbol types. In short it puts any data object on -the same level as a float or a symbol. - -<p>PDP runs on Linux and OSX. The OSX version depends on <a -href="http://fink.sourceforge.net/">Fink</a>, which is not in the "point & -click" stage yet, so setting it up will require some efford. There is no -windows version. The reason for this is simple: i don't use windows myself. -Porting would require writing code for input/output and getting the -libraries PDP depends on to work. If anyone is willing to do this, just let -me know. PDP can run without X Window, using SDL. - -<p> Currently, PDP's focus is on images and video, but there is no reason it -should stay like that. There is limited support for matrix processing -included in the main library (like Jitter or Gridflow). There is an -extension library for 1D and 2D binary cellular automata, opengl rendering -(like Gem). Some plans include audio buffers (like Vasp), ascii packets, -text buffers, ... Finally there's a library that enables you to connect a -scheme interpreter (guile) to PD/PDP. For more image processing objects, -have a look at Yves Degoyon's <a -href="http://ydegoyon.free.fr/pidip.html">PiDiP</a> library. - -<h2>Getting Started</h2> - -If you're used to working with PD, the the documentation and example -patches should be enough to get you started. Have a look at the README file -in the distribution to find out how to compile and setup. The file -doc/reference.txt contains a list of objects. If you have installed PDP -properly, you can just press the right mouse button on an object and select -help to get a help patch. If this doesn't work, look in the directory -doc/objects for a collection of help patches. The directory doc/examples -contains some more demos. The directory doc/objects contains two -abstractions that are used to setup the input and output in the help -patches. You might want to cut and connect some wires to use the -input/output setup that works for you. - -<h2>Packets and Types</h2> - -<p> PDP is centered around the concept of packets and operations on -packets. There are several types of packets. The default type for most -objects is <code><b>image/YCrCb/320x240</b></code>. This is a single video -frame, encoded in the internal 16bit YUV format, measuring 320 by 240 -pixels. Another image type is the grayscale image -<code><b>image/grey/320x240</b></code>. Important notes: All image processing objects that -combine two or more packets need to be fed with the same packet types, i.e. -encoding (YCrCb/grey) and dimensions need to be the same. Image dimensions need to be a -multiple of <code><b>8x8</b></code>. - -<p> The -<code><b>bitmap/*/*</b></code> type is another image representation type -supporting several encodings. I.e. <code><b>bitmap/rgb/*</b></code>, -<code><b>bitmap/rgba/*</b></code>, <code><b>bitmap/yv12/*</b></code>, ... - -This type cannot be processed directly by most of the image processing -objects, but it can be used to store in delay lines, or to send over the -network. It's main use is to support all kinds of input/output devices, and -opengl textures, without introducing too many conversions, but it can serve -as a space and bandwidth saver too (especially -<code><b>bitmap/yv12/*</b></code>). - -<p> One of the interesting -features in PD is the possibility of connecting everything with everything. -If you want to generalize this to all kinds of media objects, the complexity -of managing the different types starts to grow quite fast. Therefore PDP has -a type conversion system that can take care of most of the conversions -using the <code><b>[pdp_convert]</b></code> object. You can manually convert -packets to a certain type by specifying a type template as a creation -argument. I.e. <code><b>[pdp_convert image/grey/*]</b></code> will convert -any packet to a greyscale image. Most of the conversion will become -automatic later on. - -<p> An example: You can use the basic PDP library together with the -cellular automata library and the opengl rendering library to use a cellular -automaton as an input to a video processing chain. You can convert the -processed image to a texture that can be applied to a 3d object, which then -can be drawn to the screen, captured as a texture, converted back to an -image, which can then be converted to a sound, processed and converted back -to an image, etc... You get the point. The possibilities are endless. - - - - <hr> - <address><a href="mailto:pdp@zzz.kotnet.org">Tom Schouten</a></address> -<!-- Created: Thu Apr 24 22:21:03 CEST 2003 --> -<!-- hhmts start --> -Last modified: Thu Sep 25 20:51:44 CEST 2003 -<!-- hhmts end --> - </body> -</html> |