[MPlayer-dev-eng] [patch] Correct channel assignment for FLAC > 2 channels

[Andrew de Quincey]

Hi, I was playing about with converting some multi channel audio files  
to FLAC, and playing them with mplayer. I found the channels were  
played back through the wrong speakers.

If you look at libmpcodecs/ad_ffmpeg.c, you'll see there is no  
specific support for FLAC, so (for 6 channels), it'll default to  
AF_CHANNEL_LAYOUT_5_1_B (L R Ls Rs C LFE)

However, looking at the FLAC specification at  
http://flac.sourceforge.net/format.html#frame_header (channel  
assignment section) shows that FLAC actually uses an arrangement of (L  
R C LFE Ls Rs).

The attached patch fixes this, and now my FLACs play correctly.

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