Expose codec implementation names in stats.

webrtc/modules/video_coding/codecs/vp9/vp9_impl.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 29 matching lines @@
              const std::vector<FrameType>* frame_types) override;
 
   int RegisterEncodeCompleteCallback(EncodedImageCallback* callback) override;
 
   int SetChannelParameters(uint32_t packet_loss, int64_t rtt) override;
 
   int SetRates(uint32_t new_bitrate_kbit, uint32_t frame_rate) override;
 
   void OnDroppedFrame() override {}
 
+  const char* ImplementationName() const override;
+
   struct LayerFrameRefSettings {
     int8_t upd_buf = -1;   // -1 - no update,    0..7 - update buffer 0..7
     int8_t ref_buf1 = -1;  // -1 - no reference, 0..7 - reference buffer 0..7
     int8_t ref_buf2 = -1;  // -1 - no reference, 0..7 - reference buffer 0..7
     int8_t ref_buf3 = -1;  // -1 - no reference, 0..7 - reference buffer 0..7
   };
 
   struct SuperFrameRefSettings {
     LayerFrameRefSettings layer[kMaxVp9NumberOfSpatialLayers];
     uint8_t start_layer = 0;  // The first spatial layer to be encoded.
@@ skipping 81 matching lines @@
              const RTPFragmentationHeader* fragmentation,
              const CodecSpecificInfo* codec_specific_info,
              int64_t /*render_time_ms*/) override;
 
   int RegisterDecodeCompleteCallback(DecodedImageCallback* callback) override;
 
   int Release() override;
 
   int Reset() override;
 
+  const char* ImplementationName() const override;
+
  private:
   int ReturnFrame(const vpx_image_t* img, uint32_t timeStamp);
 
   // Memory pool used to share buffers between libvpx and webrtc.
   Vp9FrameBufferPool frame_buffer_pool_;
   DecodedImageCallback* decode_complete_callback_;
   bool inited_;
   vpx_codec_ctx_t* decoder_;
   VideoCodec codec_;
   bool key_frame_required_;
 };
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_VIDEO_CODING_CODECS_VP9_IMPL_H_