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gstreamer/ext/jpeg
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Sébastien Moutte 0debb1e9fc ext\jpeg\smokecodec.c: use of GST_DEBUG instead of DEBUG(a...) for WIN32 
Original commit message from CVS:
* ext\jpeg\smokecodec.c:
use of GST_DEBUG instead of DEBUG(a...) for WIN32
* ext\speex\gstspeexenc.c: (gst_speexenc_set_header_on_caps):
move first instruction after all variables declarations
* gst\alpha\gstalpha.c:
* gst\effectv\gstshagadelic.c:
* gst\smpte\paint.c:
* gst\videofilter\gstvideobalance.c:
define M_PI if it's not defined (it's not defined on WIN32)
* gst\cutter\gstcutter.c: (gst_cutter_chain):
* gst\id3demux\id3v2frames.c: (parse_relative_volume_adjustment_two):
* gst\level\gstlevel.c: (gst_level_set_property), (gst_level_transform_ip):
* gst\matroska\matroska-demux.c: (gst_matroska_demux_parse_info),
(gst_matroska_demux_video_caps):
* gst\matroska\matroska-mux.c: (gst_matroska_mux_start), (gst_matroska_mux_finish):
* gst\wavparse\gstwavparse.c: (gst_wavparse_stream_data):
use gst_guint64_to_gdouble for conversions
* gst\goom\filters.c: (setPixelRGB_):
fix a debug which was using undefined variable
* gst\level\gstlevel.c: (gst_level_set_caps), (gst_level_transform_ip):
* gst\matroska\ebml-read.c: (gst_ebml_read_sint):
replace LL suffix with L suffix (LL isn't supported by MSVC6.0)
* win32/vs6:
add vs6 projects files for most of plugins-good
2006-03-30 23:37:16 +00:00
..
gstjpeg.c docs/plugins/: Added smoke and jpeg to the docs. 2006-03-03 15:50:40 +00:00
gstjpegdec.c better/unified long descriptions 2006-03-30 15:37:05 +00:00
gstjpegdec.h ext/jpeg/gstjpegdec.*: Fix durations on outgoing buffers after seeking in MJPEG files (#334083); some minor clean-ups. 2006-03-14 09:23:09 +00:00
gstjpegenc.c better/unified long descriptions 2006-03-30 15:37:05 +00:00
gstjpegenc.h docs/plugins/: Added smoke and jpeg to the docs. 2006-03-03 15:50:40 +00:00
gstsmokedec.c better/unified long descriptions 2006-03-30 15:37:05 +00:00
gstsmokedec.h docs/plugins/: Added smoke and jpeg to the docs. 2006-03-03 15:50:40 +00:00
gstsmokeenc.c better/unified long descriptions 2006-03-30 15:37:05 +00:00
gstsmokeenc.h docs/plugins/: Added smoke and jpeg to the docs. 2006-03-03 15:50:40 +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 ext\jpeg\smokecodec.c: use of GST_DEBUG instead of DEBUG(a...) for WIN32 2006-03-30 23:37:16 +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