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gstreamer/ext/jpeg
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Tim-Philipp Müller f1fb1f80fa jpegdec: demote some log message from DEBUG to LOG 
And log decoder object.
2009-04-02 00:05:14 +01:00
..
gstjpeg.c ext/jpeg/gstjpeg.c: Remove (commented out) smoke typefinder. This is in base now. 2008-02-25 06:50:31 +00:00
gstjpegdec.c jpegdec: demote some log message from DEBUG to LOG 2009-04-02 00:05:14 +01:00
gstjpegdec.h jpegdec: demote some log message from DEBUG to LOG 2009-04-02 00:05:14 +01:00
gstjpegenc.c jpegenc: error out instead of crashing if no caps have been set 2009-02-25 12:50:37 +00:00
gstjpegenc.h Some cleanups 2009-02-23 15:48:41 +01:00
gstsmokedec.c Update and add documentation for plugins with deps (ext). 2009-01-28 18:05:09 +02:00
gstsmokedec.h Fix more gobject macros: obj<->klass, GstXXX<->GstXXXClass 2006-06-01 21:07:26 +00:00
gstsmokeenc.c Update and add documentation for plugins with deps (ext). 2009-01-28 18:05:09 +02:00
gstsmokeenc.h ext/jpeg/gstsmokeenc.*: Implement getcaps function. 2008-12-23 12:10:41 +00:00
Makefile.am Don't install static libs for plugins. Fixes #550851 for -good. 2008-11-04 12:28:34 +00:00
README ext/jpeg/: Added a new simple jpeg based codec 2004-06-08 11:47:35 +00:00
smokecodec.c ext/jpeg/: These libjpeg callbacks should return a 'boolean' (unsigned char apparently) and not a 'gboolean' (which m... 2007-01-08 12:45:10 +00:00
smokecodec.h docs/plugins/: Added smoke and jpeg to the docs. 2006-03-03 15:50:40 +00:00
smokeformat.h expand tabs 2005-12-06 19:44:58 +00:00

README 

The Smoke Codec
---------------

This is a very simple compression algorithm I was toying with when doing a
Java based player. Decoding a JPEG in Java has acceptable speed so this codec
tries to exploit that feature. The algorithm first compares the last and the 
new image and finds all 16x16 blocks that have a squared difference bigger than
a configurable threshold. Then all these blocks are compressed into an NxM JPEG.
The quality of the JPEG is inversely proportional to the number of blocks, this
way, the picture quality degrades with heavy motion scenes but the bitrate stays
more or less constant.
Decoding decompresses the JPEG and then updates the old picture with the new
blocks.


TODO:
----
- make format extensible
- motion vectors
- do some real bitrate control