Originally committed as revision 2722 to svn://svn.ffmpeg.org/ffmpeg/trunk

optimization & bugfix extracted from the 4k line diff between ffmpeg 0.4.7 and http://www.alicestreet.com/ffh263.html
the other parts of the diff where
1. spelling fixes (rejected as only a small part of it could be applied automatically)
2. cosmetics (reindention, function reordering, var renaming, ...) with bugs (rejected)
3. rtp related stuff (rejetced as it breaks several codecs)
4. some changes to the intra/inter decission & scene change detection (quality tests needed first)

Originally committed as revision 2721 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2720 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2719 to svn://svn.ffmpeg.org/ffmpeg/trunk

and a few minor things i forgot to commit ...

Originally committed as revision 2718 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2717 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2716 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2715 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2714 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2713 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2712 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2711 to svn://svn.ffmpeg.org/ffmpeg/trunk

  adaptively change middle position selection algo for seeking, this avoids some ugly worstcases of the interpolated variant
  avoid backward search for mpeg where possible, its 17 times slower then forward according to my benchmark

Originally committed as revision 2710 to svn://svn.ffmpeg.org/ffmpeg/trunk

store searched distance in index, so we dont waste time searching for keyframes where we already searched
asf seek fixes & use keyframe pos/timestamp cache

Originally committed as revision 2709 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2708 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2707 to svn://svn.ffmpeg.org/ffmpeg/trunk

replic_size==0 fix, needed so that G.726 asf file, so ffmpeg can at least decode the video without segfaulting

Originally committed as revision 2706 to svn://svn.ffmpeg.org/ffmpeg/trunk

dont let the demuxer thread die before the video has actually been played as seeking would become impossible shortly before EOF

Originally committed as revision 2705 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2704 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2703 to svn://svn.ffmpeg.org/ffmpeg/trunk

  memleaks
  infinite loops
  uninitalized variables
with some luck u can seek now a few times before it dies

Originally committed as revision 2702 to svn://svn.ffmpeg.org/ffmpeg/trunk

multiple stream seeking (yes i know seeking is still broken)
related cleanup

Originally committed as revision 2701 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2700 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2699 to svn://svn.ffmpeg.org/ffmpeg/trunk

bug was introduced in version 1.75 (2003-12-30)
this may have lead to a small drop in quality of the 4mv mode, but should have only affected the mbd=0 case

Originally committed as revision 2698 to svn://svn.ffmpeg.org/ffmpeg/trunk

move (av_)find_stream_index() to utils.c as its usefull outside mpeg.c
assert checking enabled, to find bugs quicker, should obviously be disabled later
(av_)add_index_entry() inserts new entries so that the list stays ordered and updates entries if already in it
(av_)index_search_timestamp() cleanup (kill ugly goto) and shorter

Originally committed as revision 2697 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2696 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2695 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2694 to svn://svn.ffmpeg.org/ffmpeg/trunk

Experimental ZLIB encoder (not working yet)

Originally committed as revision 2693 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2692 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2691 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2690 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2689 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2688 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2687 to svn://svn.ffmpeg.org/ffmpeg/trunk

copyright year update of the files i touched and remembered, things look annoyingly unmaintained otherwise

Originally committed as revision 2686 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2685 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2684 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2683 to svn://svn.ffmpeg.org/ffmpeg/trunk