Originally committed as revision 3522 to svn://svn.ffmpeg.org/ffmpeg/trunk

set AVCodecContext.width/height to the picture width/height instead of the one stored in the bitstream (that only matters if lowres!=0)

Originally committed as revision 3518 to svn://svn.ffmpeg.org/ffmpeg/trunk

- GOB's can exist of only MBA_STUFFING codes: it crashed before, but it is fixed now
- Clearer code
- Some extra checks so the decoder is more resilient against errors
patch by (Maarten Daniels <maarten dot daniels at student dot luc dot ac dot be>)

Originally committed as revision 3457 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 3347 to svn://svn.ffmpeg.org/ffmpeg/trunk

- Mb's were not skipped at the end of a GOB
- One value too much was used in iDCT
- Chroma_qscale was not updated for mquant
patch by ("Chris Flerackers" <cflerackers at androme dot be>)

Originally committed as revision 3332 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 3184 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 3179 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 3178 to svn://svn.ffmpeg.org/ffmpeg/trunk

no malloc(64) memcpy free stuff
no filter1 A->B then filter2 A->B (yes not B->A)
no incorrect rouding after the 1d filter

Originally committed as revision 3177 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 3176 to svn://svn.ffmpeg.org/ffmpeg/trunk