Add field trial for automic resize in MediaCodecVideoEncoder.

talk/app/webrtc/java/jni/androidmediaencoder_jni.cc

 /*
  * libjingle
  * Copyright 2015 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 18 matching lines @@
 #include "talk/app/webrtc/java/jni/androidmediaencoder_jni.h"
 #include "talk/app/webrtc/java/jni/classreferenceholder.h"
 #include "talk/app/webrtc/java/jni/androidmediacodeccommon.h"
 #include "webrtc/base/bind.h"
 #include "webrtc/base/checks.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/thread.h"
 #include "webrtc/modules/video_coding/codecs/interface/video_codec_interface.h"
 #include "webrtc/modules/video_coding/utility/include/quality_scaler.h"
 #include "webrtc/modules/video_coding/utility/include/vp8_header_parser.h"
+#include "webrtc/system_wrappers/interface/field_trial.h"
 #include "webrtc/system_wrappers/interface/logcat_trace_context.h"
 #include "third_party/libyuv/include/libyuv/convert.h"
 #include "third_party/libyuv/include/libyuv/convert_from.h"
 #include "third_party/libyuv/include/libyuv/video_common.h"
 
 using rtc::Bind;
 using rtc::Thread;
 using rtc::ThreadManager;
 using rtc::scoped_ptr;
 
@@ skipping 240 matching lines @@
   const int kLowQpThresholdDenominator = 3;
   if (codec_settings == NULL) {
     ALOGE("NULL VideoCodec instance");
     return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
   }
   // Factory should guard against other codecs being used with us.
   CHECK(codec_settings->codecType == codecType_) << "Unsupported codec " <<
       codec_settings->codecType << " for " << codecType_;
 
   ALOGD("InitEncode request");
-  scale_ = false;
+
+  scale_ = webrtc::field_trial::FindFullName(
+      "WebRTC-MediaCodecVideoEncoder-AutomaticResize") == "Enabled";
+  ALOGD("Automatic resize: %s", scale_ ? "enabled" : "disabled");
+
   if (scale_ && codecType_ == kVideoCodecVP8) {
     quality_scaler_->Init(kMaxQP / kLowQpThresholdDenominator, true);
     quality_scaler_->SetMinResolution(kMinWidth, kMinHeight);
     quality_scaler_->ReportFramerate(codec_settings->maxFramerate);
     updated_framerate_ = codec_settings->maxFramerate;
   } else {
     updated_framerate_ = -1;
   }
   return codec_thread_->Invoke<int32_t>(
       Bind(&MediaCodecVideoEncoder::InitEncodeOnCodecThread,
@@ skipping 619 matching lines @@
 }
 
 void MediaCodecVideoEncoderFactory::DestroyVideoEncoder(
     webrtc::VideoEncoder* encoder) {
   ALOGD("Destroy video encoder.");
   delete encoder;
 }
 
 }  // namespace webrtc_jni