lavu: Add a pixel format for new VDA hwaccel

The current hwaccel is broken and cannot be fixed in a compatible
way. It will be deprecated and replaced with a new one.

doc/APIchanges

@@ -13,6 +13,9 @@ libavutil:     2013-12-xx
 
 API changes, most recent first:
 
+2014-xx-xx - xxxxxxx - lavu 53.14.0 - pixfmt.h
+  Add AV_PIX_FMT_VDA for new-style VDA acceleration.
+
 2014-04-xx - xxxxxxx - lavc 55.50.3 - avcodec.h
   Deprecate CODEC_FLAG_MV0. It is replaced by the flag "mv0" in the
   "mpv_flags" private option of the mpegvideo encoders.

libavutil/pixdesc.c

@@ -1494,6 +1494,10 @@ const AVPixFmtDescriptor av_pix_fmt_descriptors[AV_PIX_FMT_NB] = {
         },
         .flags = AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_BE,
     },
+    [AV_PIX_FMT_VDA] = {
+        .name = "vda",
+        .flags = AV_PIX_FMT_FLAG_HWACCEL,
+    },
 };
 
 FF_DISABLE_DEPRECATION_WARNINGS

libavutil/pixfmt.h

@@ -198,6 +198,7 @@ enum AVPixelFormat {
 
     AV_PIX_FMT_YVYU422,   ///< packed YUV 4:2:2, 16bpp, Y0 Cr Y1 Cb
 
+    AV_PIX_FMT_VDA,          ///< HW acceleration through VDA, data[3] contains a CVPixelBufferRef
     AV_PIX_FMT_NB,        ///< number of pixel formats, DO NOT USE THIS if you want to link with shared libav* because the number of formats might differ between versions
 
 #if FF_API_PIX_FMT

libavutil/version.h

@@ -54,7 +54,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR 53
-#define LIBAVUTIL_VERSION_MINOR 13
+#define LIBAVUTIL_VERSION_MINOR 14
 #define LIBAVUTIL_VERSION_MICRO  0
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \