libvpx: Pull from upstream

source/libvpx/vpx/src/svc_encodeframe.c

 /*
  *  Copyright (c) 2013 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 332 matching lines @@
     for (i = 0; i < svc_ctx->spatial_layers; ++i) {
       if (si->svc_params.scaling_factor_den[i] > 0) {
         alloc_ratio[i] = (float)(si->svc_params.scaling_factor_num[i] * 1.0 /
                                  si->svc_params.scaling_factor_den[i]);
 
         alloc_ratio[i] *= alloc_ratio[i];
         total += alloc_ratio[i];
       }
     }
 
-    for (i = 0; i < svc_ctx->spatial_layers; ++i) {
+    for (i = 0; i < VPX_SS_MAX_LAYERS; ++i) {
       if (total > 0) {
         enc_cfg->ss_target_bitrate[i] = (unsigned int)
             (enc_cfg->rc_target_bitrate * alloc_ratio[i] / total);
       }
     }
   }
 }
 
 vpx_codec_err_t vpx_svc_init(SvcContext *svc_ctx, vpx_codec_ctx_t *codec_ctx,
                              vpx_codec_iface_t *iface,
@@ skipping 235 matching lines @@
   if (svc_ctx == NULL) return;
   // do not use get_svc_internal as it will unnecessarily allocate an
   // SvcInternal if it was not already allocated
   si = (SvcInternal *)svc_ctx->internal;
   if (si != NULL) {
     free(si);
     svc_ctx->internal = NULL;
   }
 }