Add native-handle support for single VP8 streams.

webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc

 /*
  *  Copyright (c) 2014 The WebRTC 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.
  */
 
 #include "webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.h"
 
 #include <algorithm>
 
 // NOTE(ajm): Path provided by gyp.
 #include "libyuv/scale.h"  // NOLINT
 
+#include "webrtc/base/checks.h"
 #include "webrtc/common.h"
 #include "webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h"
 
 namespace {
 
 const unsigned int kDefaultMinQp = 2;
 const unsigned int kDefaultMaxQp = 56;
 // Max qp for lowest spatial resolution when doing simulcast.
 const unsigned int kLowestResMaxQp = 45;
 
@@ skipping 462 matching lines @@
 }
 
 void SimulcastEncoderAdapter::OnDroppedFrame() {
   streaminfos_[0].encoder->OnDroppedFrame();
 }
 
 int SimulcastEncoderAdapter::GetTargetFramerate() {
   return streaminfos_[0].encoder->GetTargetFramerate();
 }
 
+bool SimulcastEncoderAdapter::SupportsNativeHandle() const {
+  // We should not be calling this method before streaminfos_ are configured.
+  RTC_DCHECK(!streaminfos_.empty());
+  // TODO(pbos): Support textures when using more than one encoder.
+  if (streaminfos_.size() != 1)
+    return false;
+  return streaminfos_[0].encoder->SupportsNativeHandle();
+}
+
 }  // namespace webrtc