Expose codec implementation names in stats.

webrtc/video/video_decoder.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 58 matching lines @@
   LOG(LS_WARNING) << "Decoder falling back to software decoding.";
   fallback_decoder_.reset(VideoDecoder::Create(decoder_type_));
   if (fallback_decoder_->InitDecode(&codec_settings_, number_of_cores_) !=
       WEBRTC_VIDEO_CODEC_OK) {
     LOG(LS_ERROR) << "Failed to initialize software-decoder fallback.";
     fallback_decoder_.reset();
     return false;
   }
   if (callback_ != nullptr)
     fallback_decoder_->RegisterDecodeCompleteCallback(callback_);
+  fallback_implementation_name_ =
+      std::string(fallback_decoder_->ImplementationName()) +
+      " (fallback from: " + decoder_->ImplementationName() + ")";
   return true;
 }
 
 int32_t VideoDecoderSoftwareFallbackWrapper::Decode(
     const EncodedImage& input_image,
     bool missing_frames,
     const RTPFragmentationHeader* fragmentation,
     const CodecSpecificInfo* codec_specific_info,
     int64_t render_time_ms) {
   // Try decoding with the provided decoder on every keyframe or when there's no
@@ skipping 41 matching lines @@
     fallback_decoder_->Reset();
   return decoder_->Reset();
 }
 
 bool VideoDecoderSoftwareFallbackWrapper::PrefersLateDecoding() const {
   if (fallback_decoder_)
     return fallback_decoder_->PrefersLateDecoding();
   return decoder_->PrefersLateDecoding();
 }
 
+const char* VideoDecoderSoftwareFallbackWrapper::ImplementationName() const {
+  if (fallback_decoder_)
+    return fallback_implementation_name_.c_str();
+  return decoder_->ImplementationName();
+}
+
 }  // namespace webrtc