[SCM] libav/experimental: Document *VLC_BITS.

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit b0704443f20d5a058634cb8e1ceb08721272b9f0
Author: Michael Niedermayer <michaelni at gmx.at>
Date:   Thu Jan 7 03:40:41 2010 +0000

    Document *VLC_BITS.
    
    Originally committed as revision 21046 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/h263.c b/libavcodec/h263.c
index 67a7f18..2dd6a15 100644
--- a/libavcodec/h263.c
+++ b/libavcodec/h263.c
@@ -45,6 +45,10 @@
 //#undef NDEBUG
 //#include <assert.h>
 
+// The defines below define the number of bits that are read at once for
+// reading vlc values. Changing these may improve speed and data cache needs
+// be aware though that decreasing them may need the number of stages that is
+// passed to get_vlc* to be increased.
 #define INTRA_MCBPC_VLC_BITS 6
 #define INTER_MCBPC_VLC_BITS 7
 #define CBPY_VLC_BITS 6

-- 
Libav/FFmpeg packaging