implement B_DIRECT and B_SKIP macroblock types. fix reference list sorting for B-frames. fix mv caching for mixed list B-blocks.
implement B_DIRECT and B_SKIP macroblock types.
fix reference list sorting for B-frames.
fix mv caching for mixed list B-blocks.


git-svn-id: a4d7c1866f8397a4106e0b57fc4fbf792bbdaaaf@3775 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg