Expose codec implementation names in stats.

webrtc/video/video_encoder_unittest.cc

 /*
  *  Copyright (c) 2015 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 49 matching lines @@
       return WEBRTC_VIDEO_CODEC_OK;
     }
 
     void OnDroppedFrame() override { ++on_dropped_frame_count_; }
 
     bool SupportsNativeHandle() const override {
       ++supports_native_handle_count_;
       return false;
     }
 
+    const char* ImplementationName() const override {
+      return "fake-encoder";
+    }
+
     int init_encode_count_ = 0;
     int32_t init_encode_return_code_ = WEBRTC_VIDEO_CODEC_OK;
     int32_t encode_return_code_ = WEBRTC_VIDEO_CODEC_OK;
     int encode_count_ = 0;
     EncodedImageCallback* encode_complete_callback_ = nullptr;
     int release_count_ = 0;
     int set_channel_parameters_count_ = 0;
     int set_rates_count_ = 0;
     int on_dropped_frame_count_ = 0;
     mutable int supports_native_handle_count_ = 0;
@@ skipping 172 matching lines @@
 }
 
 TEST_F(VideoEncoderSoftwareFallbackWrapperTest,
        SupportsNativeHandleNotForwardedDuringFallback) {
   UtilizeFallbackEncoder();
   fallback_wrapper_.SupportsNativeHandle();
   EXPECT_EQ(0, fake_encoder_.supports_native_handle_count_);
   EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK, fallback_wrapper_.Release());
 }
 
+TEST_F(VideoEncoderSoftwareFallbackWrapperTest,
+       ReportsFallbackImplementationName) {
+  UtilizeFallbackEncoder();
+  // Hard coded expected value since libvpx is the software implementation name
+  // for VP8. Change accordingly if the underlying implementation does.
+  EXPECT_STREQ("libvpx (fallback from: fake-encoder)",
+               fallback_wrapper_.ImplementationName());
+}
+
 }  // namespace webrtc