gstreamer/ext/jpeg
Edward Hervey 50f4eb876a Fix memleak with gst_static_pad_template_get().
Original commit message from CVS:
* ext/cairo/gsttextoverlay.c: (gst_text_overlay_init):
* ext/dv/gstdvdemux.c: (gst_dvdemux_init), (gst_dvdemux_add_pads):
* ext/gdk_pixbuf/gstgdkpixbuf.c: (gst_gdk_pixbuf_init):
* ext/jpeg/gstjpegdec.c: (gst_jpeg_dec_init),
(gst_jpeg_dec_setcaps):
* ext/jpeg/gstjpegenc.c: (gst_jpegenc_init):
* ext/jpeg/gstsmokedec.c: (gst_smokedec_init):
* ext/jpeg/gstsmokeenc.c: (gst_smokeenc_init):
* ext/libmng/gstmngdec.c: (gst_mngdec_init),
(gst_mngdec_src_getcaps):
* ext/libpng/gstpngdec.c: (gst_pngdec_init),
(gst_pngdec_caps_create_and_set):
* ext/libpng/gstpngenc.c: (gst_pngenc_init):
* ext/mikmod/gstmikmod.c: (gst_mikmod_init):
* ext/speex/gstspeexdec.c: (gst_speex_dec_init):
* gst/alpha/gstalpha.c: (gst_alpha_init):
* gst/auparse/gstauparse.c: (gst_au_parse_init):
* gst/avi/gstavidemux.c: (gst_avi_demux_init),
(gst_avi_demux_handle_src_event), (gst_avi_demux_parse_stream):
* gst/cutter/gstcutter.c: (gst_cutter_init):
* gst/debug/efence.c: (gst_efence_init), (gst_efence_getrange),
(gst_efence_checkgetrange):
* gst/debug/negotiation.c: (gst_negotiation_init):
* gst/flx/gstflxdec.c: (gst_flxdec_init):
* gst/goom/gstgoom.c: (gst_goom_init):
* gst/rtp/gstasteriskh263.c: (gst_asteriskh263_init):
* gst/rtp/gstrtpL16depay.c: (gst_rtp_L16depay_init):
* gst/rtp/gstrtpL16pay.c: (gst_rtpL16pay_init):
* gst/rtp/gstrtpamrdepay.c: (gst_rtp_amr_depay_init):
* gst/rtp/gstrtpdepay.c: (gst_rtp_depay_init):
* gst/rtp/gstrtpmpadepay.c: (gst_rtp_mpa_depay_init):
* gst/rtsp/gstrtpdec.c: (gst_rtpdec_init):
* gst/smpte/gstsmpte.c: (gst_smpte_init):
* gst/wavparse/gstwavparse.c: (gst_wavparse_init),
(gst_wavparse_create_sourcepad):
Fix memleak with gst_static_pad_template_get().
This uses gst_pad_new_from_static_template() instead.
Fixes #333512
2006-03-15 16:17:12 +00:00
..
gstjpeg.c docs/plugins/: Added smoke and jpeg to the docs. 2006-03-03 15:50:40 +00:00
gstjpegdec.c Fix memleak with gst_static_pad_template_get(). 2006-03-15 16:17:12 +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 Fix memleak with gst_static_pad_template_get(). 2006-03-15 16:17:12 +00:00
gstjpegenc.h docs/plugins/: Added smoke and jpeg to the docs. 2006-03-03 15:50:40 +00:00
gstsmokedec.c Fix memleak with gst_static_pad_template_get(). 2006-03-15 16:17:12 +00:00
gstsmokedec.h docs/plugins/: Added smoke and jpeg to the docs. 2006-03-03 15:50:40 +00:00
gstsmokeenc.c Fix memleak with gst_static_pad_template_get(). 2006-03-15 16:17:12 +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 fix compiler warnings 2005-09-09 16:11:48 +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

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