Support playback of f32le in mov.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@36476 b3059339-0415-0410-9bf9-f77b7e298cf2
Add some comments for internal PCM FourCC's.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@36477 b3059339-0415-0410-9bf9-f77b7e298cf2
Support 4k AVC-Intra in mov.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@36478 b3059339-0415-0410-9bf9-f77b7e298cf2