handle 0-length buffers

Originally committed as revision 2732 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index c3ae66e..bced66f 100644 (file)
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -444,6 +444,9 @@ static int adpcm_decode_frame(AVCodecContext *avctx,
     int decode_top_nibble_next = 0;
     int diff_channel;
 
     int decode_top_nibble_next = 0;
     int diff_channel;
 

+    if (!buf_size)
+        return 0;
+

     samples = data;
     src = buf;
 
     samples = data;
     src = buf;