VideoProcessorIntegrationTest: make it runnable on a task queue.

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

Index: webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest.h
diff --git a/webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest.h b/webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest.h
index 8bcc53d6d52ecb7756d46f31d406848ba24919b6..ba69cc4d06dd8eadb29352f8638f02cdc7c13d95 100644
--- a/webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest.h
+++ b/webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest.h
@@ -17,6 +17,7 @@
 #include <memory>
 #include <string>
 #include <utility>
+#include <vector>
 
 #if defined(WEBRTC_ANDROID)
 #include "webrtc/modules/video_coding/codecs/test/android_test_initializer.h"
@@ -37,9 +38,11 @@
 #include "webrtc/modules/video_coding/include/video_coding.h"
 #include "webrtc/modules/video_coding/utility/ivf_file_writer.h"
 #include "webrtc/rtc_base/checks.h"
+#include "webrtc/rtc_base/event.h"
 #include "webrtc/rtc_base/file.h"
 #include "webrtc/rtc_base/logging.h"
 #include "webrtc/rtc_base/ptr_util.h"
+#include "webrtc/system_wrappers/include/sleep.h"
 #include "webrtc/test/gtest.h"
 #include "webrtc/test/testsupport/fileutils.h"
 #include "webrtc/test/testsupport/frame_reader.h"
@@ -65,7 +68,6 @@ const float kScaleKeyFrameSize = 0.5f;
 
 // Thresholds for the quality metrics. Defaults are maximally minimal.
 struct QualityThresholds {
-  QualityThresholds() {}
   QualityThresholds(double min_avg_psnr,
                     double min_min_psnr,
                     double min_avg_ssim,
@@ -74,10 +76,10 @@ struct QualityThresholds {
         min_min_psnr(min_min_psnr),
         min_avg_ssim(min_avg_ssim),
         min_min_ssim(min_min_ssim) {}
-  double min_avg_psnr = std::numeric_limits<double>::min();
-  double min_min_psnr = std::numeric_limits<double>::min();
-  double min_avg_ssim = 0.0;
-  double min_min_ssim = 0.0;
+  double min_avg_psnr;
+  double min_min_psnr;
+  double min_avg_ssim;
+  double min_min_ssim;
 };
 
 // The sequence of bit rate and frame rate changes for the encoder, the frame
@@ -101,8 +103,8 @@ struct RateControlThresholds {
   int max_delta_frame_size_mismatch;
   int max_encoding_rate_mismatch;
   int max_time_hit_target;
-  int num_spatial_resizes;  // Set to -1 to disable check.
-  int num_key_frames;       // Set to -1 to disable check.
+  int num_spatial_resizes;
+  int num_key_frames;
 };
 
 // Should video files be saved persistently to disk for post-run visualization?
@@ -182,9 +184,10 @@ class VideoProcessorIntegrationTest : public testing::Test {
     decoder_factory_->DestroyVideoDecoder(decoder_);
   }
 
-  void SetUpObjects(const VisualizationParams* visualization_params,
-                    const int initial_bitrate_kbps,
-                    const int initial_framerate_fps) {
+  void SetUpAndInitObjects(rtc::TaskQueue* task_queue,
+                           const int initial_bitrate_kbps,
+                           const int initial_framerate_fps,
+                           const VisualizationParams* visualization_params) {
     CreateEncoderAndDecoder();
 
     // Create file objects for quality analysis.
@@ -224,11 +227,43 @@ class VideoProcessorIntegrationTest : public testing::Test {
 
     packet_manipulator_.reset(new PacketManipulatorImpl(
         &packet_reader_, config_.networking_config, config_.verbose));
-    processor_ = rtc::MakeUnique<VideoProcessor>(
-        encoder_, decoder_, analysis_frame_reader_.get(),
-        analysis_frame_writer_.get(), packet_manipulator_.get(), config_,
-        &stats_, encoded_frame_writer_.get(), decoded_frame_writer_.get());
-    processor_->Init();
+
+    config_.codec_settings.startBitrate = initial_bitrate_kbps;
+
+    rtc::Event sync_event(false, false);
+    task_queue->PostTask([this, &sync_event]() {
+      processor_ = rtc::MakeUnique<VideoProcessor>(
+          encoder_, decoder_, analysis_frame_reader_.get(),
+          analysis_frame_writer_.get(), packet_manipulator_.get(), config_,
+          &stats_, encoded_frame_writer_.get(), decoded_frame_writer_.get());
+      processor_->Init();
+      sync_event.Set();
+    });
+    sync_event.Wait(rtc::Event::kForever);
+  }
+
+  void ReleaseAndCloseObjects(rtc::TaskQueue* task_queue) {
+    rtc::Event sync_event(false, false);
+    task_queue->PostTask([this, &sync_event]() {
+      processor_->Release();
+      sync_event.Set();
+    });
+    sync_event.Wait(rtc::Event::kForever);
+
+    // The VideoProcessor must be ::Release()'d before we destroy the codecs.
+    DestroyEncoderAndDecoder();
+
+    // Close the analysis files before we use them for SSIM/PSNR calculations.
+    analysis_frame_reader_->Close();
+    analysis_frame_writer_->Close();
+
+    // Close visualization files.
+    if (encoded_frame_writer_) {
+      EXPECT_TRUE(encoded_frame_writer_->Close());
+    }
+    if (decoded_frame_writer_) {
+      decoded_frame_writer_->Close();
+    }
   }
 
   // Reset quantities after each encoder update, update the target per-frame
@@ -307,10 +342,19 @@ class VideoProcessorIntegrationTest : public testing::Test {
   }
 
   // Verify expected behavior of rate control and print out data.
-  void VerifyRateControlMetrics(int rate_update_index,
-                                const RateControlThresholds& rc_expected) {
-    int num_dropped_frames = processor_->NumberDroppedFrames();
-    int num_resize_actions = processor_->NumberSpatialResizes();
+  void PrintAndMaybeVerifyRateControlMetrics(
+      int rate_update_index,
+      const std::vector<RateControlThresholds>* rc_thresholds,
+      const std::vector<int>& num_dropped_frames,
+      const std::vector<int>& num_resize_actions) {
+    const RateControlThresholds* rc_threshold = nullptr;
+    if (rc_thresholds) {
+      rc_threshold = &(*rc_thresholds)[rate_update_index];
+
+      EXPECT_LE(perc_encoding_rate_mismatch_,
+                rc_threshold->max_encoding_rate_mismatch);
+    }
+
     printf(
         "Rate update #%d:\n"
         " Target bitrate         : %d\n"
@@ -322,11 +366,10 @@ class VideoProcessorIntegrationTest : public testing::Test {
         " # frames to convergence: %d\n"
         " # dropped frames       : %d\n"
         " # spatial resizes      : %d\n",
-        num_frames_total_, num_frames_to_hit_target_, num_dropped_frames,
-        num_resize_actions);
+        num_frames_total_, num_frames_to_hit_target_,
+        num_dropped_frames[rate_update_index],
+        num_resize_actions[rate_update_index]);
 
-    EXPECT_LE(perc_encoding_rate_mismatch_,
-              rc_expected.max_encoding_rate_mismatch);
     if (num_key_frames_ > 0) {
       int perc_key_frame_size_mismatch =
           100 * sum_key_frame_size_mismatch_ / num_key_frames_;
@@ -334,8 +377,10 @@ class VideoProcessorIntegrationTest : public testing::Test {
           " # key frames           : %d\n"
           " Key frame rate mismatch: %d\n",
           num_key_frames_, perc_key_frame_size_mismatch);
-      EXPECT_LE(perc_key_frame_size_mismatch,
-                rc_expected.max_key_frame_size_mismatch);
+      if (rc_threshold) {
+        EXPECT_LE(perc_key_frame_size_mismatch,
+                  rc_threshold->max_key_frame_size_mismatch);
+      }
     }
 
     const int num_temporal_layers =
@@ -358,20 +403,22 @@ class VideoProcessorIntegrationTest : public testing::Test {
           i, bitrate_layer_[i], framerate_layer_[i], per_frame_bandwidth_[i],
           encoding_bitrate_[i], perc_frame_size_mismatch,
           perc_encoding_rate_mismatch, num_frames_per_update_[i]);
-      EXPECT_LE(perc_frame_size_mismatch,
-                rc_expected.max_delta_frame_size_mismatch);
-      EXPECT_LE(perc_encoding_rate_mismatch,
-                rc_expected.max_encoding_rate_mismatch);
+      if (rc_threshold) {
+        EXPECT_LE(perc_frame_size_mismatch,
+                  rc_threshold->max_delta_frame_size_mismatch);
+        EXPECT_LE(perc_encoding_rate_mismatch,
+                  rc_threshold->max_encoding_rate_mismatch);
+      }
     }
     printf("\n");
 
-    EXPECT_LE(num_frames_to_hit_target_, rc_expected.max_time_hit_target);
-    EXPECT_LE(num_dropped_frames, rc_expected.max_num_dropped_frames);
-    if (rc_expected.num_spatial_resizes >= 0) {
-      EXPECT_EQ(rc_expected.num_spatial_resizes, num_resize_actions);
-    }
-    if (rc_expected.num_key_frames >= 0) {
-      EXPECT_EQ(rc_expected.num_key_frames, num_key_frames_);
+    if (rc_threshold) {
+      EXPECT_LE(num_frames_to_hit_target_, rc_threshold->max_time_hit_target);
+      EXPECT_LE(num_dropped_frames[rate_update_index],
+                rc_threshold->max_num_dropped_frames);
+      EXPECT_EQ(rc_threshold->num_spatial_resizes,
+                num_resize_actions[rate_update_index]);
+      EXPECT_EQ(rc_threshold->num_key_frames, num_key_frames_);
     }
   }
 
@@ -384,15 +431,6 @@ class VideoProcessorIntegrationTest : public testing::Test {
     EXPECT_GT(ssim_result.min, quality_thresholds.min_min_ssim);
   }
 
-  void VerifyQpParser(int frame_number) {
-    if (!config_.hw_codec &&
-        (config_.codec_settings.codecType == kVideoCodecVP8 ||
-         config_.codec_settings.codecType == kVideoCodecVP9)) {
-      EXPECT_EQ(processor_->GetQpFromEncoder(frame_number),
-                processor_->GetQpFromBitstream(frame_number));
-    }
-  }
-
   static int NumberOfTemporalLayers(const VideoCodec& codec_settings) {
     if (codec_settings.codecType == kVideoCodecVP8) {
       return codec_settings.VP8().numberOfTemporalLayers;
@@ -436,8 +474,10 @@ class VideoProcessorIntegrationTest : public testing::Test {
     return tl_idx;
   }
 
-  // Set the bit rate and frame rate per temporal layer, for up to 3 layers.
-  void SetTemporalLayerRates() {
+  void UpdateRates(int rate_update_index, const RateProfile& rate_profile) {
+    bitrate_kbps_ = rate_profile.target_bit_rate[rate_update_index];
+    framerate_ = rate_profile.input_frame_rate[rate_update_index];
+
     const int num_temporal_layers =
         NumberOfTemporalLayers(config_.codec_settings);
     RTC_DCHECK_LE(num_temporal_layers, kMaxNumTemporalLayers);
@@ -460,112 +500,139 @@ class VideoProcessorIntegrationTest : public testing::Test {
   }
 
   // Processes all frames in the clip and verifies the result.
-  // TODO(brandtr): Change the second last argument to be a
-  // const std::vector<RateControlThresholds>&, so we can ensure that the user
-  // does not expect us to do mid-clip rate updates when we are not able to,
-  // e.g., when we are operating in batch mode.
-  void ProcessFramesAndVerify(const QualityThresholds& quality_thresholds,
-                              const RateProfile& rate_profile,
-                              RateControlThresholds* rc_thresholds,
-                              const VisualizationParams* visualization_params) {
-    config_.codec_settings.startBitrate = rate_profile.target_bit_rate[0];
-    SetUpObjects(visualization_params, rate_profile.target_bit_rate[0],
-                 rate_profile.input_frame_rate[0]);
+  void ProcessFramesAndMaybeVerify(
+      const RateProfile& rate_profile,
+      const std::vector<RateControlThresholds>* rc_thresholds,
+      const QualityThresholds* quality_thresholds,
+      const VisualizationParams* visualization_params) {
+    // The Android HW codec needs to be run on a task queue, so we simply always
+    // run the test on a task queue.
+    rtc::TaskQueue task_queue("VidProc TQ");
+    rtc::Event sync_event(false, false);
+
+    SetUpAndInitObjects(&task_queue, rate_profile.target_bit_rate[0],
+                        rate_profile.input_frame_rate[0], visualization_params);
 
     // Set initial rates.
-    bitrate_kbps_ = rate_profile.target_bit_rate[0];
-    framerate_ = rate_profile.input_frame_rate[0];
-    SetTemporalLayerRates();
-    // Set the initial target size for key frame.
-    target_size_key_frame_initial_ =
-        0.5 * kInitialBufferSize * bitrate_layer_[0];
-    processor_->SetRates(bitrate_kbps_, framerate_);
+    int rate_update_index = 0;
+    task_queue.PostTask([this, &rate_profile, rate_update_index] {
+      processor_->SetRates(rate_profile.target_bit_rate[rate_update_index],
+                           rate_profile.input_frame_rate[rate_update_index]);
+    });
 
-    // Process each frame, up to |num_frames|.
+    // Process all frames.
     int frame_number = 0;
-    int update_index = 0;
-    int num_frames = rate_profile.num_frames;
-    ResetRateControlMetrics(
-        rate_profile.frame_index_rate_update[update_index + 1]);
-
-    if (config_.batch_mode) {
-      // In batch mode, we calculate the metrics for all frames after all frames
-      // have been sent for encoding.
-
-      // TODO(brandtr): Refactor "frame number accounting" so we don't have to
-      // call ProcessFrame num_frames+1 times here.
-      for (frame_number = 0; frame_number <= num_frames; ++frame_number) {
-        processor_->ProcessFrame(frame_number);
+    const int num_frames = rate_profile.num_frames;
+    RTC_DCHECK_GE(num_frames, 1);
+    while (frame_number < num_frames) {
+      // In order to not overwhelm the OpenMAX buffers in the Android
+      // MediaCodec API, we roughly pace the frames here. The downside
+      // of this is that the encode run will be done in real-time.
+      // TODO(brandtr): Investigate if this is needed on iOS.
+      if (config_.hw_codec) {
+        SleepMs(rtc::kNumMillisecsPerSec /
+                rate_profile.input_frame_rate[rate_update_index]);
       }
 
-      for (frame_number = 0; frame_number < num_frames; ++frame_number) {
-        const int tl_idx = TemporalLayerIndexForFrame(frame_number);
-        ++num_frames_per_update_[tl_idx];
-        ++num_frames_total_;
-        UpdateRateControlMetrics(frame_number);
-      }
-    } else {
-      // In online mode, we calculate the metrics for a given frame right after
-      // it has been sent for encoding.
+      task_queue.PostTask(
+          [this, frame_number] { processor_->ProcessFrame(frame_number); });
+      ++frame_number;
 
-      if (config_.hw_codec) {
-        LOG(LS_WARNING) << "HW codecs should mostly be run in batch mode, "
-                           "since they may be pipelining.";
-      }
+      if (frame_number ==
+          rate_profile.frame_index_rate_update[rate_update_index + 1]) {
+        ++rate_update_index;
 
-      while (frame_number < num_frames) {
-        processor_->ProcessFrame(frame_number);
-        VerifyQpParser(frame_number);
-        const int tl_idx = TemporalLayerIndexForFrame(frame_number);
-        ++num_frames_per_update_[tl_idx];
-        ++num_frames_total_;
-        UpdateRateControlMetrics(frame_number);
-
-        ++frame_number;
-
-        // If we hit another/next update, verify stats for current state and
-        // update layers and codec with new rates.
-        if (frame_number ==
-            rate_profile.frame_index_rate_update[update_index + 1]) {
-          VerifyRateControlMetrics(update_index, rc_thresholds[update_index]);
-
-          // Update layer rates and the codec with new rates.
-          ++update_index;
-          bitrate_kbps_ = rate_profile.target_bit_rate[update_index];
-          framerate_ = rate_profile.input_frame_rate[update_index];
-          SetTemporalLayerRates();
-          ResetRateControlMetrics(
-              rate_profile.frame_index_rate_update[update_index + 1]);
-          processor_->SetRates(bitrate_kbps_, framerate_);
-        }
+        task_queue.PostTask([this, &rate_profile, rate_update_index] {
+          processor_->SetRates(
+              rate_profile.target_bit_rate[rate_update_index],
+              rate_profile.input_frame_rate[rate_update_index]);
+        });
       }
-      // TODO(brandtr): Refactor "frame number accounting" so we don't have to
-      // call ProcessFrame one extra time here.
-      processor_->ProcessFrame(frame_number);
     }
 
-    // Verify rate control metrics for all frames (if in batch mode), or for all
-    // frames since the last rate update (if not in batch mode).
-    VerifyRateControlMetrics(update_index, rc_thresholds[update_index]);
-    EXPECT_EQ(num_frames, frame_number);
-    EXPECT_EQ(num_frames + 1, static_cast<int>(stats_.stats_.size()));
-
-    // Release encoder and decoder to make sure they have finished processing.
-    processor_->Release();
-    DestroyEncoderAndDecoder();
+    // TODO(brandtr): Verify the assumption that HW codecs never
+    // drop frames internally.
+    if (config_.hw_codec) {
+      // Ensure that all the frames have been encoded and decoded.
+      int last_decoded_frame_num = -1;
+      int wait_count = 0;
+      while (last_decoded_frame_num != (num_frames - 1) && wait_count++ < 10) {
+        sync_event.Reset();
+        task_queue.PostTask([this, &last_decoded_frame_num, &sync_event]() {
+          last_decoded_frame_num = processor_->LastDecodedFrameNumber();
+          sync_event.Set();
+        });
+        sync_event.Wait(rtc::Event::kForever);
+
+        SleepMs(1000);
+      }
+      EXPECT_LT(wait_count, 10) << "Lost frames in the VideoProcessor.";
+    }
 
-    // Close the analysis files before we use them for SSIM/PSNR calculations.
-    analysis_frame_reader_->Close();
-    analysis_frame_writer_->Close();
+    ReleaseAndCloseObjects(&task_queue);
 
-    // Close visualization files.
-    if (encoded_frame_writer_) {
-      EXPECT_TRUE(encoded_frame_writer_->Close());
+    // Verify QP parsing.
+    // TODO(brandtr): This verification is somewhat orthogonal to the rest of
+    // this test, which is focused on measuring image quality and rate control
+    // quality. We should create a whole separate test that verifies the QP
+    // parsing. This could be done by instantiating a VideoProcessor, encoding
+    // a number of frames, and then verifying the parsing.
+    if (!config_.hw_codec &&
+        (config_.codec_settings.codecType == kVideoCodecVP8 ||
+         config_.codec_settings.codecType == kVideoCodecVP9)) {
+      for (int frame_number = 0; frame_number < num_frames; ++frame_number) {
+        task_queue.PostTask([this, frame_number] {
+          EXPECT_EQ(processor_->GetQpFromEncoder(frame_number),
+                    processor_->GetQpFromBitstream(frame_number));
+        });
+      }
     }
-    if (decoded_frame_writer_) {
-      decoded_frame_writer_->Close();
+
+    // Calculate and print rate control statistics.
+    rate_update_index = 0;
+    frame_number = 0;
+    UpdateRates(rate_update_index, rate_profile);
+    ResetRateControlMetrics(
+        rate_profile.frame_index_rate_update[rate_update_index + 1]);
+    target_size_key_frame_initial_ =
+        0.5 * kInitialBufferSize * bitrate_layer_[0];
+    std::vector<int> num_dropped_frames;
+    std::vector<int> num_resize_actions;
+    sync_event.Reset();
+    task_queue.PostTask(
+        [this, &num_dropped_frames, &num_resize_actions, &sync_event]() {
+          num_dropped_frames = processor_->NumberDroppedFramesPerRateUpdate();
+          num_resize_actions = processor_->NumberSpatialResizesPerRateUpdate();
+          sync_event.Set();
+        });
+    sync_event.Wait(rtc::Event::kForever);
+    while (frame_number < num_frames) {
+      ++num_frames_per_update_[TemporalLayerIndexForFrame(frame_number)];
+      ++num_frames_total_;
+      UpdateRateControlMetrics(frame_number);
+
+      ++frame_number;
+
+      if (frame_number ==
+          rate_profile.frame_index_rate_update[rate_update_index + 1]) {
+        PrintAndMaybeVerifyRateControlMetrics(rate_update_index, rc_thresholds,
+                                              num_dropped_frames,
+                                              num_resize_actions);
+        ++rate_update_index;
+        UpdateRates(rate_update_index, rate_profile);
+        ResetRateControlMetrics(
+            rate_profile.frame_index_rate_update[rate_update_index + 1]);
+      }
     }
+    PrintAndMaybeVerifyRateControlMetrics(rate_update_index, rc_thresholds,
+                                          num_dropped_frames,
+                                          num_resize_actions);
 
+    // Calculate and print other statistics.
+    EXPECT_EQ(num_frames, static_cast<int>(stats_.stats_.size()));
+    stats_.PrintSummary();
+
+    // Calculate and print image quality statistics.
     // TODO(marpan): Should compute these quality metrics per SetRates update.
     QualityMetricsResult psnr_result, ssim_result;
     EXPECT_EQ(0, I420MetricsFromFiles(config_.input_filename.c_str(),
@@ -573,8 +640,9 @@ class VideoProcessorIntegrationTest : public testing::Test {
                                       config_.codec_settings.width,
                                       config_.codec_settings.height,
                                       &psnr_result, &ssim_result));
-    VerifyQuality(psnr_result, ssim_result, quality_thresholds);
-    stats_.PrintSummary();
+    if (quality_thresholds) {
+      VerifyQuality(psnr_result, ssim_result, *quality_thresholds);
+    }
     printf("PSNR avg: %f, min: %f\nSSIM avg: %f, min: %f\n",
            psnr_result.average, psnr_result.min, ssim_result.average,
            ssim_result.min);
@@ -591,8 +659,7 @@ class VideoProcessorIntegrationTest : public testing::Test {
                             bool use_single_core,
                             float packet_loss_probability,
                             std::string filename,
-                            bool verbose_logging,
-                            bool batch_mode) {
+                            bool verbose_logging) {
     config->filename = filename;
     config->input_filename = ResourcePath(filename, "yuv");
     // Generate an output filename in a safe way.
@@ -602,7 +669,6 @@ class VideoProcessorIntegrationTest : public testing::Test {
     config->use_single_core = use_single_core;
     config->verbose = verbose_logging;
     config->hw_codec = hw_codec;
-    config->batch_mode = batch_mode;
   }
 
   static void SetCodecSettings(TestConfig* config,
@@ -663,25 +729,26 @@ class VideoProcessorIntegrationTest : public testing::Test {
         frame_index_rate_update;
   }
 
-  static void SetRateControlThresholds(RateControlThresholds* rc_thresholds,
-                                       int update_index,
-                                       int max_num_dropped_frames,
-                                       int max_key_frame_size_mismatch,
-                                       int max_delta_frame_size_mismatch,
-                                       int max_encoding_rate_mismatch,
-                                       int max_time_hit_target,
-                                       int num_spatial_resizes,
-                                       int num_key_frames) {
-    rc_thresholds[update_index].max_num_dropped_frames = max_num_dropped_frames;
-    rc_thresholds[update_index].max_key_frame_size_mismatch =
-        max_key_frame_size_mismatch;
-    rc_thresholds[update_index].max_delta_frame_size_mismatch =
-        max_delta_frame_size_mismatch;
-    rc_thresholds[update_index].max_encoding_rate_mismatch =
-        max_encoding_rate_mismatch;
-    rc_thresholds[update_index].max_time_hit_target = max_time_hit_target;
-    rc_thresholds[update_index].num_spatial_resizes = num_spatial_resizes;
-    rc_thresholds[update_index].num_key_frames = num_key_frames;
+  static void AddRateControlThresholds(
+      int max_num_dropped_frames,
+      int max_key_frame_size_mismatch,
+      int max_delta_frame_size_mismatch,
+      int max_encoding_rate_mismatch,
+      int max_time_hit_target,
+      int num_spatial_resizes,
+      int num_key_frames,
+      std::vector<RateControlThresholds>* rc_thresholds) {
+    RTC_DCHECK(rc_thresholds);
+
+    rc_thresholds->emplace_back();
+    RateControlThresholds* rc_threshold = &rc_thresholds->back();
+    rc_threshold->max_num_dropped_frames = max_num_dropped_frames;
+    rc_threshold->max_key_frame_size_mismatch = max_key_frame_size_mismatch;
+    rc_threshold->max_delta_frame_size_mismatch = max_delta_frame_size_mismatch;
+    rc_threshold->max_encoding_rate_mismatch = max_encoding_rate_mismatch;
+    rc_threshold->max_time_hit_target = max_time_hit_target;
+    rc_threshold->num_spatial_resizes = num_spatial_resizes;
+    rc_threshold->num_key_frames = num_key_frames;
   }
 
   // Config.