Fix two checks in the AAC packetiser, which were too conservative

Patch by Martin Storsjö (martin AT martin DOT st)

Originally committed as revision 18400 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/rtp_aac.c

@@ -39,7 +39,7 @@ void ff_rtp_send_aac(AVFormatContext *s1, const uint8_t *buff, int size)
 
     /* test if the packet must be sent */
     len = (s->buf_ptr - s->buf);
-    if ((s->num_frames == MAX_FRAMES_PER_PACKET) || (len && (len + size) > max_packet_size)) {
+    if ((s->num_frames == MAX_FRAMES_PER_PACKET) || (len && (len + size) > s->max_payload_size)) {
         int au_size = s->num_frames * 2;
 
         p = s->buf + MAX_AU_HEADERS_SIZE - au_size - 2;
@@ -59,7 +59,7 @@ void ff_rtp_send_aac(AVFormatContext *s1, const uint8_t *buff, int size)
         s->timestamp = s->cur_timestamp;
     }
 
-    if (size < max_packet_size) {
+    if (size <= max_packet_size) {
         p = s->buf + s->num_frames++ * 2 + 2;
         *p++ = size >> 5;
         *p = (size & 0x1F) << 3;