mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-18 06:16:36 +00:00
7e522c28c2
Original commit message from CVS: * ext/jpeg/gstsmokedec.c: (gst_smokedec_chain): * ext/jpeg/gstsmokeenc.c: (gst_smokeenc_setcaps), (gst_smokeenc_resync), (gst_smokeenc_chain): Refuse sink caps in the encoder if width or height is not a multiple of 16, the encoder does not support that yet; along the same lines, check the return value of the encoder setup function; also remove some debug log clutter. |
||
|---|---|---|
| .. | ||
| gstjpeg.c | ||
| gstjpegdec.c | ||
| gstjpegdec.h | ||
| gstjpegenc.c | ||
| gstjpegenc.h | ||
| gstsmokedec.c | ||
| gstsmokedec.h | ||
| gstsmokeenc.c | ||
| gstsmokeenc.h | ||
| Makefile.am | ||
| README | ||
| smokecodec.c | ||
| smokecodec.h | ||
| smokeformat.h | ||
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