libvpx: Pull from upstream

source/libvpx/vpx/src/vpx_decoder.c

 /*
  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 208 matching lines @@
       /* Everything look ok, set the mmap in the decoder */
       res = ctx->iface->set_mmap(ctx, mmap);
 
       if (res)
         break;
     }
   }
 
   return SAVE_STATUS(ctx, res);
 }
+
+vpx_codec_err_t vpx_codec_set_frame_buffer_functions(
+    vpx_codec_ctx_t *ctx, vpx_get_frame_buffer_cb_fn_t cb_get,
+    vpx_release_frame_buffer_cb_fn_t cb_release, void *cb_priv) {
+  vpx_codec_err_t res;
+
+  if (!ctx || !cb_get || !cb_release) {
+    res = VPX_CODEC_INVALID_PARAM;
+  } else if (!ctx->iface || !ctx->priv ||
+             !(ctx->iface->caps & VPX_CODEC_CAP_EXTERNAL_FRAME_BUFFER)) {
+    res = VPX_CODEC_ERROR;
+  } else {
+    res = ctx->iface->dec.set_fb_fn(ctx->priv->alg_priv, cb_get, cb_release,
+                                    cb_priv);
+  }
+
+  return SAVE_STATUS(ctx, res);
+}