last frame decoding fix

Originally committed as revision 2074 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/h263dec.c

@@ -401,9 +401,17 @@ uint64_t time= rdtsc();
     s->flags= avctx->flags;
 
     *data_size = 0;
-   
-   /* no supplementary picture */
+
+    /* no supplementary picture */
     if (buf_size == 0) {
+        /* special case for last picture */
+        if (s->low_delay==0 && s->next_picture_ptr) {
+            *pict= *(AVFrame*)s->next_picture_ptr;
+            s->next_picture_ptr= NULL;
+
+            *data_size = sizeof(AVFrame);
+        }
+
         return 0;
     }
 

libavcodec/mpeg12.c

@@ -2231,12 +2231,11 @@ static int mpeg_decode_frame(AVCodecContext *avctx,
     *data_size = 0;
 
     /* special case for last picture */
-    if (buf_size == 0) {
-        if (s2->picture_number > 0) {
-            *picture= *(AVFrame*)&s2->next_picture;
+    if (buf_size == 0 && s2->low_delay==0 && s2->next_picture_ptr) {
+        *picture= *(AVFrame*)s2->next_picture_ptr;
+        s2->next_picture_ptr= NULL;
 
-            *data_size = sizeof(AVFrame);
-        }
+        *data_size = sizeof(AVFrame);
         return 0;
     }