Update of /cvsroot/mplayer/main/DOCS/tech In directory mail:/var/tmp.root/cvs-serv12457 Modified Files: mpcf.txt Log Message: removing startcode emulation prevention, its nonsense ... Index: mpcf.txt =================================================================== RCS file: /cvsroot/mplayer/main/DOCS/tech/mpcf.txt,v retrieving revision 1.2 retrieving revision 1.3 diff -u -r1.2 -r1.3 --- mpcf.txt 6 Feb 2003 17:19:09 -0000 1.2 +++ mpcf.txt 6 Feb 2003 17:46:23 -0000 1.3 @@ -22,8 +22,6 @@ headers & index can be repeated audio packet reshuffle checksums to allow quick redownloading of damaged parts - gurantees that no mpeg startcode prefixes occur in the headers with the - exception of codec specific headers (really?) @@ -51,10 +49,6 @@ string[i] u(8) } zero_byte f(8) -Note: the string MUST not be 0 bytes long (only a zero byte coded), instead - {'?', 0} should be used instead, this is done to avoid emulating - startcode prefixes (if we allow 0 then there could be 0,0,1 which - is a startcode prefix in mpeg) f(x) n fixed bits u(x) unsigned number encoded in x bits in MSB first order @@ -262,7 +256,6 @@ checksum crc32 checksum using the generator polynomial=0x04c11db7 (same as ogg) - bit 23 is forced to 1 to avoid MPEG startcode emulation checksum_flag indicates that the frame_checksum is coded
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Michael Niedermayer CVS