gstreamer/ext/jpeg
Thomas Vander Stichele c793316e38 cleanups, debugging and memleak fixes
Original commit message from CVS:
cleanups, debugging and memleak fixes
2004-08-09 16:38:53 +00:00
..
gstjpeg.c ext/jpeg/: Added a new simple jpeg based codec 2004-06-08 11:47:35 +00:00
gstjpegdec.c cleanups, debugging and memleak fixes 2004-08-09 16:38:53 +00:00
gstjpegdec.h *.h: Revert indenting 2004-03-15 16:32:54 +00:00
gstjpegenc.c second batch : remove ',' at end of enums as they could confuse older gcc, foreign compilers (forte) and gtk-doc (in ... 2004-05-21 23:28:57 +00:00
gstjpegenc.h *.h: Revert indenting 2004-03-15 16:32:54 +00:00
gstsmokedec.c ext/jpeg/: Added a new simple jpeg based codec 2004-06-08 11:47:35 +00:00
gstsmokedec.h ext/jpeg/: Added a new simple jpeg based codec 2004-06-08 11:47:35 +00:00
gstsmokeenc.c ext/jpeg/: Added a new simple jpeg based codec 2004-06-08 11:47:35 +00:00
gstsmokeenc.h ext/jpeg/: Added a new simple jpeg based codec 2004-06-08 11:47:35 +00:00
Makefile.am sigh 2004-06-09 12:43:29 +00:00
README ext/jpeg/: Added a new simple jpeg based codec 2004-06-08 11:47:35 +00:00
smokecodec.c ext/jpeg/: Added a new simple jpeg based codec 2004-06-08 11:47:35 +00:00
smokecodec.h ext/jpeg/: Added a new simple jpeg based codec 2004-06-08 11:47:35 +00:00

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