libvpx: Pull from upstream

source/libvpx/vpx/vpx_encoder.h

 /*
  *  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.
  */
 #ifndef VPX_VPX_ENCODER_H_
@@ skipping 31 matching lines @@
   /*!\deprecated Use #VPX_TS_MAX_PERIODICITY instead. */
 #define MAX_PERIODICITY VPX_TS_MAX_PERIODICITY
 
   /*!\deprecated Use #VPX_TS_MAX_LAYERS instead. */
 #define MAX_LAYERS      VPX_TS_MAX_LAYERS
 
 /*! Spatial Scalability: Maximum number of coding layers */
 #define VPX_SS_MAX_LAYERS       5
 
 /*! Spatial Scalability: Default number of coding layers */
-#define VPX_SS_DEFAULT_LAYERS       3
+#define VPX_SS_DEFAULT_LAYERS       1
 
   /*!\brief Current ABI version number
    *
    * \internal
    * If this file is altered in any way that changes the ABI, this value
    * must be bumped.  Examples include, but are not limited to, changing
    * types, removing or reassigning enums, adding/removing/rearranging
    * fields to structures
    */
 #define VPX_ENCODER_ABI_VERSION (3 + VPX_CODEC_ABI_VERSION) /**<\hideinitializer*/
@@ skipping 872 matching lines @@
    */
   const vpx_image_t *vpx_codec_get_preview_frame(vpx_codec_ctx_t   *ctx);
 
 
   /*!@} - end defgroup encoder*/
 #ifdef __cplusplus
 }
 #endif
 #endif  // VPX_VPX_ENCODER_H_