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gstreamer/ext/jpeg
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Wim Taymans 39d8d88afe ext/jpeg/: Various cleanups, capsnego and leak fixes. 
Original commit message from CVS:
* ext/jpeg/gstjpegenc.c: (gst_jpegenc_getcaps):
* ext/jpeg/gstsmokedec.c: (gst_smokedec_class_init),
(gst_smokedec_init), (gst_smokedec_finalize), (gst_smokedec_chain),
(gst_smokedec_change_state):
* ext/jpeg/gstsmokeenc.c: (gst_smokeenc_class_init),
(gst_smokeenc_init), (gst_smokeenc_finalize),
(gst_smokeenc_getcaps), (gst_smokeenc_setcaps),
(gst_smokeenc_resync), (gst_smokeenc_chain),
(gst_smokeenc_set_property), (gst_smokeenc_get_property),
(gst_smokeenc_change_state):
Various cleanups, capsnego and leak fixes.
2006-10-30 09:24:53 +00:00
..
gstjpeg.c docs/plugins/: Added smoke and jpeg to the docs. 2006-03-03 15:50:40 +00:00
gstjpegdec.c Printf format fixes. 2006-10-05 16:37:33 +00:00
gstjpegdec.h ext/jpeg/gstjpegdec.*: API: Added IDCT method property 2006-06-09 17:12:52 +00:00
gstjpegenc.c ext/jpeg/: Various cleanups, capsnego and leak fixes. 2006-10-30 09:24:53 +00:00
gstjpegenc.h Fix more gobject macros: obj<->klass, GstXXX<->GstXXXClass 2006-06-01 21:07:26 +00:00
gstsmokedec.c ext/jpeg/: Various cleanups, capsnego and leak fixes. 2006-10-30 09:24:53 +00:00
gstsmokedec.h Fix more gobject macros: obj<->klass, GstXXX<->GstXXXClass 2006-06-01 21:07:26 +00:00
gstsmokeenc.c ext/jpeg/: Various cleanups, capsnego and leak fixes. 2006-10-30 09:24:53 +00:00
gstsmokeenc.h Fix more gobject macros: obj<->klass, GstXXX<->GstXXXClass 2006-06-01 21:07:26 +00:00
Makefile.am docs/plugins/: Added smoke and jpeg to the docs. 2006-03-03 15:50:40 +00:00
README ext/jpeg/: Added a new simple jpeg based codec 2004-06-08 11:47:35 +00:00
smokecodec.c Fix a bunch of problems discovered by the Forte compiler, mostly type mixups and pointer arithmetics with void pointe... 2006-10-16 18:22:47 +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