[FFmpeg-cvslog] r21087 - trunk/libavcodec/mpeg4videoenc.c

[diego]

Author: diego
Date: Fri Jan  8 11:00:56 2010
New Revision: 21087

Log:
Explain why the level variable is magically inceased in mpeg4_encode_dc().
It must be in a certain range to avoid DC overflows.

Modified:
   trunk/libavcodec/mpeg4videoenc.c

Modified: trunk/libavcodec/mpeg4videoenc.c
==============================================================================
--- trunk/libavcodec/mpeg4videoenc.c	Fri Jan  8 09:19:18 2010	(r21086)
+++ trunk/libavcodec/mpeg4videoenc.c	Fri Jan  8 11:00:56 2010	(r21087)
@@ -242,6 +242,7 @@ void ff_clean_mpeg4_qscales(MpegEncConte
 static inline void mpeg4_encode_dc(PutBitContext * s, int level, int n)
 {
 #if 1
+    /* DC will overflow if level is outside the [-255,255] range. */
     level+=256;
     if (n < 4) {
         /* luminance */