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gstreamer/subprojects/gst-plugins-good/ext/jpeg
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Marek Vasut 7a93616ed6 jpegdec: Call gst_jpeg_turbo_parse_ext_fmt_convert() before jpeg_start_decompress() 
It is imperative that the libjpeg-turbo state is properly initialized
before jpeg_start_decompress() is called. Make sure cinfo.out_color_space
and cinfo.raw_data_out are set to their final values matching their peer
caps before calling jpeg_start_decompress().

Fixes: e6d83d8f96 ("jpegdec: Support libjpeg-turbo colorspace conversion")
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1716>
2022-02-16 11:09:00 +00:00
..
gstjpeg.c
gstjpeg.h
gstjpegdec.c jpegdec: Call gst_jpeg_turbo_parse_ext_fmt_convert() before jpeg_start_decompress() 2022-02-16 11:09:00 +00:00
gstjpegdec.h
gstjpegelements.h
gstjpegenc.c
gstjpegenc.h
gstjpegplugin.c
gstsmokedec.c
gstsmokedec.h
gstsmokeenc.c
gstsmokeenc.h
meson.build Move files from gst-plugins-good into the "subprojects/gst-plugins-good/" subdir 2021-09-24 16:13:50 -03:00
README
smokecodec.c
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