mpegvideo: operate with pointers to AVFrames instead of whole structs

The most interesting parts are initialization in ff_MPV_common_init() and
uninitialization in ff_MPV_common_end().

ff_mpeg_unref_picture and ff_thread_release_buffer have additional NULL
checks for Picture.f, because these functions can be called on
uninitialized or partially initialized Pictures.

NULL pointer checks are added to ff_thread_release_buffer() stub function.

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/libavcodec/mpegvideo.h b/libavcodec/mpegvideo.h
index af2281ed51..e1ee40f808 100644
--- a/libavcodec/mpegvideo.h
+++ b/libavcodec/mpegvideo.h
@@ -91,7 +91,7 @@ struct MpegEncContext;
  * Picture.
  */
 typedef struct Picture{
-    struct AVFrame f;
+    struct AVFrame *f;
     ThreadFrame tf;
 
     AVBufferRef *qscale_table_buf;