From: Michael Niedermayer <michaelni@gmx.at>
Date: Tue, 20 Sep 2005 18:51:12 +0000 (+0000)
Subject: precautionary checks
X-Git-Tag: v0.5~13558
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9061be9fb389c31e40b732e36b6ae311dbad552c;p=platform%2Fupstream%2Flibav.git

precautionary checks

Originally committed as revision 4602 to svn://svn.ffmpeg.org/ffmpeg/trunk
---

diff --git a/libavcodec/bitstream.h b/libavcodec/bitstream.h
index 26dee2d..9616d5f 100644
--- a/libavcodec/bitstream.h
+++ b/libavcodec/bitstream.h
@@ -53,6 +53,9 @@ typedef struct PutBitContext {
 
 static inline void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
 {
+    if(buffer_size < 0)
+        buffer= buffer_size= 0;
+
     s->buf = buffer;
     s->buf_end = s->buf + buffer_size;
 #ifdef ALT_BITSTREAM_WRITER
@@ -672,7 +675,9 @@ static inline void skip_bits1(GetBitContext *s){
 static inline void init_get_bits(GetBitContext *s,
                    const uint8_t *buffer, int bit_size)
 {
-    const int buffer_size= (bit_size+7)>>3;
+    int buffer_size= (bit_size+7)>>3;
+    if(buffer_size < 0 || bit_size < 0)
+        buffer= buffer_size= bit_size= 0;
 
     s->buffer= buffer;
     s->size_in_bits= bit_size;