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4ee4a9bff9
Pull out peer caps checking code into gst_jpeg_turbo_parse_ext_fmt_convert(). This code is used by libjpeg-turbo extras to determine whether peer is capable of handling buffers into which libjpeg-turbo can directly decode data. This kind of check must be performed before jpeg_start_decompress() is called in gst_jpeg_dec_prepare_decode() as well as in gst_jpeg_dec_negotiate(), hence the common code. This commit does modify the code a little to make it easier to call from both call sites without much duplication, hence the extra `if (*clrspc)` test. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1687> |
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| .. | ||
| gstjpeg.c | ||
| gstjpeg.h | ||
| gstjpegdec.c | ||
| gstjpegdec.h | ||
| gstjpegelements.h | ||
| gstjpegenc.c | ||
| gstjpegenc.h | ||
| gstjpegplugin.c | ||
| gstsmokedec.c | ||
| gstsmokedec.h | ||
| gstsmokeenc.c | ||
| gstsmokeenc.h | ||
| meson.build | ||
| 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