Re-land "Convert native handles to buffers before encoding."

webrtc/video_encoder.h

 /*
  *  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 105 matching lines @@
   //          - bitrate         : New target bit rate
   //          - framerate       : The target frame rate
   //
   // Return value                : WEBRTC_VIDEO_CODEC_OK if OK, < 0 otherwise.
   virtual int32_t SetRates(uint32_t bitrate, uint32_t framerate) = 0;
 
   virtual int32_t SetPeriodicKeyFrames(bool enable) { return -1; }
   virtual int32_t CodecConfigParameters(uint8_t* /*buffer*/, int32_t /*size*/) {
     return -1;
   }
-  virtual void OnDroppedFrame() {};
+  virtual void OnDroppedFrame() {}
+  virtual bool SupportsNativeHandle() const { return false; }
 };
 
 // Class used to wrap external VideoEncoders to provide a fallback option on
 // software encoding when a hardware encoder fails to encode a stream due to
 // hardware restrictions, such as max resolution.
 class VideoEncoderSoftwareFallbackWrapper : public VideoEncoder {
  public:
   VideoEncoderSoftwareFallbackWrapper(VideoCodecType codec_type,
                                       webrtc::VideoEncoder* encoder);
 
   int32_t InitEncode(const VideoCodec* codec_settings,
                      int32_t number_of_cores,
                      size_t max_payload_size) override;
 
   int32_t RegisterEncodeCompleteCallback(
       EncodedImageCallback* callback) override;
 
   int32_t Release() override;
   int32_t Encode(const VideoFrame& frame,
                  const CodecSpecificInfo* codec_specific_info,
                  const std::vector<VideoFrameType>* frame_types) override;
   int32_t SetChannelParameters(uint32_t packet_loss, int64_t rtt) override;
 
   int32_t SetRates(uint32_t bitrate, uint32_t framerate) override;
   void OnDroppedFrame() override;
+  bool SupportsNativeHandle() const override;
 
  private:
   const EncoderType encoder_type_;
   webrtc::VideoEncoder* const encoder_;
 
   rtc::scoped_ptr<webrtc::VideoEncoder> fallback_encoder_;
   EncodedImageCallback* callback_;
 };
 }  // namespace webrtc
 #endif  // WEBRTC_VIDEO_ENCODER_H_