RESOURCE_UTILIZATION in VideoFrameMetadata, a consumer feedback signal.

media/cast/sender/video_sender_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdint.h>
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 545 matching lines @@
   EXPECT_EQ(0, transport_.number_of_rtp_packets());
 }
 
 TEST_F(VideoSenderTest, CheckVideoFrameFactoryIsNull) {
   InitEncoder(false, true);
   ASSERT_EQ(STATUS_INITIALIZED, operational_status_);
 
   EXPECT_EQ(nullptr, video_sender_->CreateVideoFrameFactory().get());
 }
 
+TEST_F(VideoSenderTest, PopulatesResourceUtilizationInFrameMetadata) {
+  InitEncoder(false, true);
+  ASSERT_EQ(STATUS_INITIALIZED, operational_status_);
+
+  for (int i = 0; i < 3; ++i) {
+    scoped_refptr<media::VideoFrame> video_frame = GetNewVideoFrame();
+    ASSERT_FALSE(video_frame->metadata()->HasKey(
+        media::VideoFrameMetadata::RESOURCE_UTILIZATION));
+
+    const base::TimeTicks reference_time = testing_clock_->NowTicks();
+    video_sender_->InsertRawVideoFrame(video_frame, reference_time);
+
+    // Run encode tasks.  VideoSender::OnEncodedVideoFrame() will be called once
+    // encoding of the frame is complete, and this is when the
+    // RESOURCE_UTILIZATION metadata is populated.
+    RunTasks(33);
+
+    // Check that the RESOURCE_UTILIZATION value is set and non-negative.  Don't
+    // check for specific values because they are dependent on real-world CPU
+    // encode time, which can vary across test runs.
+    double utilization = -1.0;
+    EXPECT_TRUE(video_frame->metadata()->GetDouble(
+        media::VideoFrameMetadata::RESOURCE_UTILIZATION, &utilization));
+    EXPECT_LE(0.0, utilization);
+    if (i == 0)
+      EXPECT_GE(1.0, utilization);  // Key frames never exceed 1.0.
+    DVLOG(1) << "Utilization computed by VideoSender is: " << utilization;
+  }
+}
+
 }  // namespace cast
 }  // namespace media