From 5b37e2fc9ad85b8fcec376b1aec439abedfb4432 Mon Sep 17 00:00:00 2001
From: Justin Ruggles <justin.ruggles@gmail.com>
Date: Tue, 3 Mar 2009 04:45:45 +0000
Subject: [PATCH] flacdec: Avoid trying to read 33 bits.  This occurs when the
 source is 32 bits-per-sample and channel decorrelation is used.  Such files
 are valid, but not supported currently.

Originally committed as revision 17743 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/flacdec.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavcodec/flacdec.c b/libavcodec/flacdec.c
index 04cb54d1ce..8c73434912 100644
--- a/libavcodec/flacdec.c
+++ b/libavcodec/flacdec.c
@@ -37,6 +37,7 @@
 
 #include "libavutil/crc.h"
 #include "avcodec.h"
+#include "internal.h"
 #include "bitstream.h"
 #include "golomb.h"
 #include "flac.h"
@@ -429,6 +430,10 @@ static inline int decode_subframe(FLACContext *s, int channel)
         if (s->decorrelation == LEFT_SIDE || s->decorrelation == MID_SIDE)
             s->curr_bps++;
     }
+    if (s->curr_bps > 32) {
+        ff_log_missing_feature(s->avctx, "decorrelated bit depth > 32", 0);
+        return -1;
+    }
 
     if (get_bits1(&s->gb)) {
         av_log(s->avctx, AV_LOG_ERROR, "invalid subframe padding\n");