slight PSNR/bitrate increase

Originally committed as revision 7361 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7360 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 21730 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

This one moves the GPL check in the right place

Originally committed as revision 7359 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7358 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 21728 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

Originally committed as revision 7357 to svn://svn.ffmpeg.org/ffmpeg/trunk

patch by Ramiro Polla, ramiro lisha.ufsc br

Originally committed as revision 7356 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7355 to svn://svn.ffmpeg.org/ffmpeg/trunk

non-writable sections.
patch by Tom Harper d.thomas.harper gmail com

Originally committed as revision 7354 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7353 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7352 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7351 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7350 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7349 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7348 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7347 to svn://svn.ffmpeg.org/ffmpeg/trunk

 some PSNR/bitrate improvement for adaptive quant

Originally committed as revision 7346 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7345 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7344 to svn://svn.ffmpeg.org/ffmpeg/trunk

skip motion estimation and encoding of non direct-0,0 MBs if the next MB is skiped (mpeg4 doesnt allow such MBs and in the past we did ME and encoding until at the end we droped them, so this should be faster though i didnt benchmark it, benchmark welcome)

Originally committed as revision 7343 to svn://svn.ffmpeg.org/ffmpeg/trunk

  some PSNR/bitrate gain if adaptive quant is used
initalize qscale_table correctly (it was pretty much random since the qp->lambda change)
  this probably has not much effect as the table isnt used currently IIRC

Originally committed as revision 7342 to svn://svn.ffmpeg.org/ffmpeg/trunk

  some PSNR/bitrate gain for b frames with adaptive quant or QPRD

Originally committed as revision 7341 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7340 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7339 to svn://svn.ffmpeg.org/ffmpeg/trunk

patch by Ramiro Polla, ramiro lisha.ufsc br

Originally committed as revision 7338 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7337 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7336 to svn://svn.ffmpeg.org/ffmpeg/trunk

patch by elupus _at_ ecce.se

Originally committed as revision 7335 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7334 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 21702 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

Since mplayer always define CONFIG_GPL, this commit should not change
anything for mplayer.

Originally committed as revision 21699 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

dont favor the zero MV if mv0 is used (psnr per bitrate gains ranging from 0 to 0.14, most are <=0.04 though)

Originally committed as revision 7333 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7332 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7331 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7330 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7329 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7328 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7327 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7326 to svn://svn.ffmpeg.org/ffmpeg/trunk