Add ability to instantiate VideoEncoderSoftwareFallback in VP tests.

webrtc/modules/video_coding/codecs/test/videoprocessor.h

 /*
  *  Copyright (c) 2012 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 75 matching lines @@
   int keyframe_interval = 0;
 
   // The codec settings to use for the test (target bitrate, video size,
   // framerate and so on). This struct should be filled in using the
   // VideoCodingModule::Codec() method.
   webrtc::VideoCodec codec_settings;
 
   // If printing of information to stdout shall be performed during processing.
   bool verbose = true;
 
-  // If HW or SW codec should be used.
-  bool hw_codec = false;
+  // Should hardware accelerated codecs be used?
+  bool hw_encoder = false;
+  bool hw_decoder = false;
+
+  // Should the hardware codecs be wrapped in software fallbacks?
+  bool sw_fallback_encoder = false;
+  // TODO(brandtr): Add support for SW decoder fallbacks, when
+  // webrtc::VideoDecoder's can be wrapped in std::unique_ptr's.
 };
 
 // Handles encoding/decoding of video using the VideoEncoder/VideoDecoder
 // interfaces. This is done in a sequential manner in order to be able to
 // measure times properly.
 // The class processes a frame at the time for the configured input file.
 // It maintains state of where in the source input file the processing is at.
 //
 // Regarding packet loss: Note that keyframes are excluded (first or all
 // depending on the ExcludeFrameTypes setting). This is because if key frames
@@ skipping 202 matching lines @@
 
   rtc::SequencedTaskChecker sequence_checker_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(VideoProcessor);
 };
 
 }  // namespace test
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_VIDEO_CODING_CODECS_TEST_VIDEOPROCESSOR_H_