Gwenole Beauchesne 3bc6078f32 mpeg2: optimize scan for start codes. ... Accelerate scan for start codes by skipping up to 3 bytes per iteration. A start code prefix is defined by the following bytes: 00 00 01. Thus, for any group of 3 bytes (xx yy zz), we have the following possible cases: 1. If zz != 1, this cannot be a start code, then skip 3 bytes; 2. If yy != 0, this cannot be a start code, then skip 2 bytes; 3. If xx != 0 or zz != 1, this cannot be a start code, then skip 1 byte; 4. xx == 00, yy == 00, zz == 1, we have match! This algorithm requires to peek bytes from the adapter. This increases the amount of bytes copied to a temporary buffer, but this process is much faster than scanning for all the bytes and using shift/masks. So, overall, this is a win.		2013-01-09 16:05:18 +01:00
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gst	mpeg2: optimize scan for start codes.	2013-01-09 16:05:18 +01:00
Makefile.am	Initial import of the gstreamer-vaapi hierarchy.	2010-01-12 15:51:39 +00:00