X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fwmadec.c;h=07fd960f7f93a354caefe4ccd19e3458d0581ed5;hb=c0d3fea6000bae5937df6f5744e1dfdd3ab83795;hp=78b51e5871bf8c685f9eb7524025cdc738014a4e;hpb=e645d7a6d452df83cedcbb1d6708429ceea156da;p=ffmpeg

diff --git a/libavcodec/wmadec.c b/libavcodec/wmadec.c
index 78b51e5871b..07fd960f7f9 100644
--- a/libavcodec/wmadec.c
+++ b/libavcodec/wmadec.c
@@ -585,10 +585,16 @@ static int wma_decode_block(WMACodecContext *s)
                     decode_exp_lsp(s, ch);
                 }
                 s->exponents_bsize[ch] = bsize;
+                s->exponents_initialized[ch] = 1;
             }
         }
     }
 
+    for (ch = 0; ch < s->avctx->channels; ch++) {
+        if (s->channel_coded[ch] && !s->exponents_initialized[ch])
+            return AVERROR_INVALIDDATA;
+    }
+
     /* parse spectral coefficients : just RLE encoding */
     for (ch = 0; ch < s->avctx->channels; ch++) {
         if (s->channel_coded[ch]) {
@@ -889,11 +895,11 @@ static int wma_decode_superframe(AVCodecContext *avctx, void *data,
             q   = s->last_superframe + s->last_superframe_len;
             len = bit_offset;
             while (len > 7) {
-                *q++ = (get_bits) (&s->gb, 8);
+                *q++ = get_bits(&s->gb, 8);
                 len -= 8;
             }
             if (len > 0)
-                *q++ = (get_bits) (&s->gb, len) << (8 - len);
+                *q++ = get_bits(&s->gb, len) << (8 - len);
             memset(q, 0, AV_INPUT_BUFFER_PADDING_SIZE);
 
             /* XXX: bit_offset bits into last frame */