Revert "vda: user ref buffer mode"

This commit is not valid as the libav part is still missing.

This reverts commit c7a2a17a.

configure.ac

@@ -2347,12 +2347,12 @@ AS_IF([test "${enable_vda}" != "no"], [
   AS_IF([test "x${have_avcodec}" = "xyes"], [
     AC_CHECK_HEADERS(VideoDecodeAcceleration/VDADecoder.h,
       [
-      PKG_CHECK_EXISTS([libavcodec >= 55.19.0], [
+        AC_CHECK_HEADERS(libavcodec/vda.h, [
            have_avcodec_vda="yes"
         ],[
 	AS_IF([test "${enable_vda}" = "yes"],
-         [AC_MSG_ERROR([libavcodec >= 55.19.0 is required for VDA decoding])],
-         [AC_MSG_WARN([libavcodec >= 55.19.0 is required for VDA decoding])])
+	      [AC_MSG_ERROR([vda is present but libavcodec/vda.h is missing])],
+              [AC_MSG_WARN([vda is present but libavcodec/vda.h is missing ])])
         ])
   ],[
 	AS_IF([test "${enable_vda}" = "yes"],

modules/codec/avcodec/vda.c

@@ -106,6 +106,7 @@ static void vda_Copy420YpCbCr8Planar( picture_t *p_pic,
                   i_width, i_height, cache );
 
     CVPixelBufferUnlockBaseAddress( buffer, 0 );
+    CVPixelBufferRelease( buffer );
 }
 
 /*****************************************************************************
@@ -136,6 +137,7 @@ static void vda_Copy422YpCbCr8( picture_t *p_pic,
     }
 
     CVPixelBufferUnlockBaseAddress( buffer, 0 );
+    CVPixelBufferRelease( buffer );
 }
 
 static int Setup( vlc_va_t *external, void **pp_hw_ctx, vlc_fourcc_t *pi_chroma,