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gstreamer/ext/jpeg
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Sebastian Dröge 6f74b2afb7 gst: Set alignment at the correct place of GstAllocationParams
2012-08-08 17:41:31 +02:00
..
gstjpeg.c gst: Update for GST_PLUGIN_DEFINE() API changes 2012-04-05 17:36:38 +02:00
gstjpeg.h Add -Wredundant-decls warning flag 2010-03-17 19:35:10 +01:00
gstjpegdec.c No code with side-effects inside g_assert() please 2012-08-08 11:07:55 +01:00
gstjpegdec.h jpegdec: Remove unused variable 2012-05-18 11:05:02 +02:00
gstjpegenc.c gst: Set alignment at the correct place of GstAllocationParams 2012-08-08 17:41:31 +02:00
gstjpegenc.h jpeg: Port to 0.11 again 2012-05-14 14:39:34 +02:00
gstsmokedec.c Use new gst_element_class_set_static_metadata() 2012-04-10 00:51:41 +01:00
gstsmokedec.h Fix more gobject macros: obj<->klass, GstXXX<->GstXXXClass 2006-06-01 21:07:26 +00:00
gstsmokeenc.c Use new gst_element_class_set_static_metadata() 2012-04-10 00:51:41 +01:00
gstsmokeenc.h ext/jpeg/gstsmokeenc.*: Implement getcaps function. 2008-12-23 12:10:41 +00:00
Makefile.am gst: Update versioning 2012-04-04 14:37:47 +02:00
README ext/jpeg/: Added a new simple jpeg based codec 2004-06-08 11:47:35 +00:00
smokecodec.c smokeenc: don't crash when compiled against libjpeg7 2009-08-17 17:08:45 +01:00
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