mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-12-20 23:36:38 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/ext/jpeg
History
Wim Taymans 9365f12d6e GST_FLOW_WRONG_STATE -> GST_FLOW_FLUSHING
2012-02-08 16:43:30 +01:00
..
gstjpeg.c jpeg: port to 0.11 2011-08-17 15:39:27 +02:00
gstjpeg.h Add -Wredundant-decls warning flag 2010-03-17 19:35:10 +01:00
gstjpegdec.c GST_FLOW_WRONG_STATE -> GST_FLOW_FLUSHING 2012-02-08 16:43:30 +01:00
gstjpegdec.h jpeg: port to 0.11 2011-08-17 15:39:27 +02:00
gstjpegenc.c more memory API porting 2012-01-25 12:30:29 +01:00
gstjpegenc.h more memory API porting 2012-01-25 12:30:29 +01:00
gstsmokedec.c various: fix pad template leaks 2011-11-28 13:30:27 +00:00
gstsmokedec.h Fix more gobject macros: obj<->klass, GstXXX<->GstXXXClass 2006-06-01 21:07:26 +00:00
gstsmokeenc.c various: fix pad template leaks 2011-11-28 13:30:27 +00:00
gstsmokeenc.h ext/jpeg/gstsmokeenc.*: Implement getcaps function. 2008-12-23 12:10:41 +00:00
Makefile.am jpeg: port to 0.11 2011-08-17 15:39:27 +02:00
README
smokecodec.c smokeenc: don't crash when compiled against libjpeg7 2009-08-17 17:08:45 +01:00
smokecodec.h
smokeformat.h

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