rtpenc_aac: Fix calculation of the header size

Previously the high end byte was always set to zero. Also get
rid of an unnecessary multiplication (which in practice couldn't
overflow) before shifting.

Signed-off-by: Martin Storsjö <martin@martin.st>

diff --git a/libavformat/rtpenc_aac.c b/libavformat/rtpenc_aac.c
index 86318dfa6e11efa166a298da2892017c2f132f46..1b2fa0a78cdaf0a8205f919e250a4258c170d606 100644 (file)
--- a/libavformat/rtpenc_aac.c
+++ b/libavformat/rtpenc_aac.c
@@ -47,8 +47,8 @@ void ff_rtp_send_aac(AVFormatContext *s1, const uint8_t *buff, int size)
             memmove(p + 2, s->buf + 2, au_size);
         }
         /* Write the AU header size */
-        p[0] = ((au_size * 8) & 0xFF) >> 8;
-        p[1] = (au_size * 8) & 0xFF;
+        p[0] =  au_size >> 5;
+        p[1] = (au_size & 0x1F) << 3;
 
         ff_rtp_send_data(s1, p, s->buf_ptr - p, 1);