Add native handle support to SimulcastEncoderAdapter.

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.
  */
 
@@ skipping 271 matching lines @@
       streaminfos_[stream_idx].key_frame_request = false;
     } else {
       stream_frame_types.push_back(kVideoFrameDelta);
     }
 
     int dst_width = streaminfos_[stream_idx].width;
     int dst_height = streaminfos_[stream_idx].height;
     // If scaling isn't required, because the input resolution
     // matches the destination or the input image is empty (e.g.
     // a keyframe request for encoders with internal camera
-    // sources), pass the image on directly. Otherwise, we'll
-    // scale it to match what the encoder expects (below).
+    // sources) or the source image has a native handle, pass the image on
+    // directly. Otherwise, we'll scale it to match what the encoder expects
+    // (below).
+    // For texture frames, the underlying encoder is expected to be able to
+    // correctly sample/scale the source texture.
+    // TODO(perkj): ensure that works going forward, and figure out how this
+    // affects webrtc:5683.
     if ((dst_width == src_width && dst_height == src_height) ||
-        input_image.IsZeroSize()) {
+        input_image.IsZeroSize() ||
+        input_image.video_frame_buffer()->native_handle()) {
       int ret = streaminfos_[stream_idx].encoder->Encode(
           input_image, codec_specific_info, &stream_frame_types);
       if (ret != WEBRTC_VIDEO_CODEC_OK) {
         return ret;
       }
     } else {
       VideoFrame dst_frame;
       // Making sure that destination frame is of sufficient size.
       // Aligning stride values based on width.
       dst_frame.CreateEmptyFrame(dst_width, dst_height, dst_width,
@@ skipping 197 matching lines @@
   return !streaminfos_.empty();
 }
 
 void SimulcastEncoderAdapter::OnDroppedFrame() {
   streaminfos_[0].encoder->OnDroppedFrame();
 }
 
 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();
+  for (const auto& streaminfo : streaminfos_) {
+    if (!streaminfo.encoder->SupportsNativeHandle())
+      return false;
+  }
+  return true;
 }
 
 const char* SimulcastEncoderAdapter::ImplementationName() const {
   return implementation_name_.c_str();
 }
 
 }  // namespace webrtc