avoid random noise on damaged frames

Originally committed as revision 6836 to svn://svn.ffmpeg.org/ffmpeg/trunk

avoid random noise on damaged frames
Originally committed as revision 6836 to svn://svn.ffmpeg.org/ffmpeg/trunk
c0d8052b · Michael Niedermayer · 5423fe73 · c0d8052b
Commit c0d8052b authored Oct 30, 2006 by Michael Niedermayer
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mpegaudiodec.c libavcodec/mpegaudiodec.c +2 -1

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--- a/libavcodec/mpegaudiodec.c
+++ b/libavcodec/mpegaudiodec.c
@@ -2269,7 +2269,8 @@ static int mp_decode_layer3(MPADecodeContext *s)
 //av_log(NULL, AV_LOG_ERROR, "backstep:%d, lastbuf:%d\n", main_data_begin, s->last_buf_size);
    if(main_data_begin > s->last_buf_size){
        av_log(NULL, AV_LOG_ERROR, "backstep:%d, lastbuf:%d\n", main_data_begin, s->last_buf_size);
-        s->last_buf_size= main_data_begin;
+//        s->last_buf_size= main_data_begin;
+        return -1;
      }

    memcpy(s->last_buf + s->last_buf_size, ptr, EXTRABYTES);