libvpx: Pull from upstream

source/libvpx/webmdec.cc

 /*
  *  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 23 matching lines @@
   }
   webm_ctx->reader = NULL;
   webm_ctx->segment = NULL;
   webm_ctx->buffer = NULL;
   webm_ctx->cluster = NULL;
   webm_ctx->block_entry = NULL;
   webm_ctx->block = NULL;
   webm_ctx->block_frame_index = 0;
   webm_ctx->video_track_index = 0;
   webm_ctx->timestamp_ns = 0;
+  webm_ctx->is_key_frame = false;
 }
 
 void get_first_cluster(struct WebmInputContext *const webm_ctx) {
   mkvparser::Segment *const segment =
       reinterpret_cast<mkvparser::Segment*>(webm_ctx->segment);
   const mkvparser::Cluster *const cluster = segment->GetFirst();
   webm_ctx->cluster = cluster;
 }
 
 void rewind_and_reset(struct WebmInputContext *const webm_ctx,
@@ skipping 121 matching lines @@
     delete[] *buffer;
     *buffer = new uint8_t[frame.len];
     if (*buffer == NULL) {
       return -1;
     }
     *buffer_size = frame.len;
     webm_ctx->buffer = *buffer;
   }
   *bytes_in_buffer = frame.len;
   webm_ctx->timestamp_ns = block->GetTime(cluster);
+  webm_ctx->is_key_frame = block->IsKey();
 
   mkvparser::MkvReader *const reader =
       reinterpret_cast<mkvparser::MkvReader*>(webm_ctx->reader);
   return frame.Read(reader, *buffer) ? -1 : 0;
 }
 
 int webm_guess_framerate(struct WebmInputContext *webm_ctx,
                          struct VpxInputContext *vpx_ctx) {
   uint32_t i = 0;
   uint8_t *buffer = NULL;
@@ skipping 15 matching lines @@
   webm_ctx->block_entry = NULL;
   webm_ctx->block_frame_index = 0;
   webm_ctx->timestamp_ns = 0;
 
   return 0;
 }
 
 void webm_free(struct WebmInputContext *webm_ctx) {
   reset(webm_ctx);
 }