modules/video_coding refactorings

webrtc/modules/video_coding/main/source/media_optimization.cc

Index: webrtc/modules/video_coding/main/source/media_optimization.cc
diff --git a/webrtc/modules/video_coding/main/source/media_optimization.cc b/webrtc/modules/video_coding/main/source/media_optimization.cc
deleted file mode 100644
index bf0b14423740ad262ff2b2e6f742028e03ee2804..0000000000000000000000000000000000000000
--- a/webrtc/modules/video_coding/main/source/media_optimization.cc
+++ /dev/null
@@ -1,648 +0,0 @@
-/*
- *  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.
- */
-
-#include "webrtc/modules/video_coding/main/source/media_optimization.h"
-
-#include "webrtc/base/logging.h"
-#include "webrtc/modules/video_coding/main/source/content_metrics_processing.h"
-#include "webrtc/modules/video_coding/main/source/qm_select.h"
-#include "webrtc/modules/video_coding/utility/include/frame_dropper.h"
-#include "webrtc/system_wrappers/include/clock.h"
-
-namespace webrtc {
-namespace media_optimization {
-namespace {
-void UpdateProtectionCallback(
-    VCMProtectionMethod* selected_method,
-    uint32_t* video_rate_bps,
-    uint32_t* nack_overhead_rate_bps,
-    uint32_t* fec_overhead_rate_bps,
-    VCMProtectionCallback* video_protection_callback) {
-  FecProtectionParams delta_fec_params;
-  FecProtectionParams key_fec_params;
-  // Get the FEC code rate for Key frames (set to 0 when NA).
-  key_fec_params.fec_rate = selected_method->RequiredProtectionFactorK();
-
-  // Get the FEC code rate for Delta frames (set to 0 when NA).
-  delta_fec_params.fec_rate = selected_method->RequiredProtectionFactorD();
-
-  // Get the FEC-UEP protection status for Key frames: UEP on/off.
-  key_fec_params.use_uep_protection = selected_method->RequiredUepProtectionK();
-
-  // Get the FEC-UEP protection status for Delta frames: UEP on/off.
-  delta_fec_params.use_uep_protection =
-      selected_method->RequiredUepProtectionD();
-
-  // The RTP module currently requires the same |max_fec_frames| for both
-  // key and delta frames.
-  delta_fec_params.max_fec_frames = selected_method->MaxFramesFec();
-  key_fec_params.max_fec_frames = selected_method->MaxFramesFec();
-
-  // Set the FEC packet mask type. |kFecMaskBursty| is more effective for
-  // consecutive losses and little/no packet re-ordering. As we currently
-  // do not have feedback data on the degree of correlated losses and packet
-  // re-ordering, we keep default setting to |kFecMaskRandom| for now.
-  delta_fec_params.fec_mask_type = kFecMaskRandom;
-  key_fec_params.fec_mask_type = kFecMaskRandom;
-
-  // TODO(Marco): Pass FEC protection values per layer.
-  video_protection_callback->ProtectionRequest(&delta_fec_params,
-                                               &key_fec_params,
-                                               video_rate_bps,
-                                               nack_overhead_rate_bps,
-                                               fec_overhead_rate_bps);
-}
-}  // namespace
-
-struct MediaOptimization::EncodedFrameSample {
-  EncodedFrameSample(size_t size_bytes,
-                     uint32_t timestamp,
-                     int64_t time_complete_ms)
-      : size_bytes(size_bytes),
-        timestamp(timestamp),
-        time_complete_ms(time_complete_ms) {}
-
-  size_t size_bytes;
-  uint32_t timestamp;
-  int64_t time_complete_ms;
-};
-
-MediaOptimization::MediaOptimization(Clock* clock)
-    : crit_sect_(CriticalSectionWrapper::CreateCriticalSection()),
-      clock_(clock),
-      max_bit_rate_(0),
-      send_codec_type_(kVideoCodecUnknown),
-      codec_width_(0),
-      codec_height_(0),
-      user_frame_rate_(0),
-      frame_dropper_(new FrameDropper),
-      loss_prot_logic_(
-          new VCMLossProtectionLogic(clock_->TimeInMilliseconds())),
-      fraction_lost_(0),
-      send_statistics_zero_encode_(0),
-      max_payload_size_(1460),
-      video_target_bitrate_(0),
-      incoming_frame_rate_(0),
-      enable_qm_(false),
-      encoded_frame_samples_(),
-      avg_sent_bit_rate_bps_(0),
-      avg_sent_framerate_(0),
-      key_frame_cnt_(0),
-      delta_frame_cnt_(0),
-      content_(new VCMContentMetricsProcessing()),
-      qm_resolution_(new VCMQmResolution()),
-      last_qm_update_time_(0),
-      last_change_time_(0),
-      num_layers_(0),
-      suspension_enabled_(false),
-      video_suspended_(false),
-      suspension_threshold_bps_(0),
-      suspension_window_bps_(0) {
-  memset(send_statistics_, 0, sizeof(send_statistics_));
-  memset(incoming_frame_times_, -1, sizeof(incoming_frame_times_));
-}
-
-MediaOptimization::~MediaOptimization(void) {
-  loss_prot_logic_->Release();
-}
-
-void MediaOptimization::Reset() {
-  CriticalSectionScoped lock(crit_sect_.get());
-  SetEncodingDataInternal(
-      kVideoCodecUnknown, 0, 0, 0, 0, 0, 0, max_payload_size_);
-  memset(incoming_frame_times_, -1, sizeof(incoming_frame_times_));
-  incoming_frame_rate_ = 0.0;
-  frame_dropper_->Reset();
-  loss_prot_logic_->Reset(clock_->TimeInMilliseconds());
-  frame_dropper_->SetRates(0, 0);
-  content_->Reset();
-  qm_resolution_->Reset();
-  loss_prot_logic_->UpdateFrameRate(incoming_frame_rate_);
-  loss_prot_logic_->Reset(clock_->TimeInMilliseconds());
-  send_statistics_zero_encode_ = 0;
-  video_target_bitrate_ = 0;
-  codec_width_ = 0;
-  codec_height_ = 0;
-  user_frame_rate_ = 0;
-  key_frame_cnt_ = 0;
-  delta_frame_cnt_ = 0;
-  last_qm_update_time_ = 0;
-  last_change_time_ = 0;
-  encoded_frame_samples_.clear();
-  avg_sent_bit_rate_bps_ = 0;
-  num_layers_ = 1;
-}
-
-void MediaOptimization::SetEncodingData(VideoCodecType send_codec_type,
-                                        int32_t max_bit_rate,
-                                        uint32_t target_bitrate,
-                                        uint16_t width,
-                                        uint16_t height,
-                                        uint32_t frame_rate,
-                                        int num_layers,
-                                        int32_t mtu) {
-  CriticalSectionScoped lock(crit_sect_.get());
-  SetEncodingDataInternal(send_codec_type,
-                          max_bit_rate,
-                          frame_rate,
-                          target_bitrate,
-                          width,
-                          height,
-                          num_layers,
-                          mtu);
-}
-
-void MediaOptimization::SetEncodingDataInternal(VideoCodecType send_codec_type,
-                                                int32_t max_bit_rate,
-                                                uint32_t frame_rate,
-                                                uint32_t target_bitrate,
-                                                uint16_t width,
-                                                uint16_t height,
-                                                int num_layers,
-                                                int32_t mtu) {
-  // Everything codec specific should be reset here since this means the codec
-  // has changed. If native dimension values have changed, then either user
-  // initiated change, or QM initiated change. Will be able to determine only
-  // after the processing of the first frame.
-  last_change_time_ = clock_->TimeInMilliseconds();
-  content_->Reset();
-  content_->UpdateFrameRate(frame_rate);
-
-  max_bit_rate_ = max_bit_rate;
-  send_codec_type_ = send_codec_type;
-  video_target_bitrate_ = target_bitrate;
-  float target_bitrate_kbps = static_cast<float>(target_bitrate) / 1000.0f;
-  loss_prot_logic_->UpdateBitRate(target_bitrate_kbps);
-  loss_prot_logic_->UpdateFrameRate(static_cast<float>(frame_rate));
-  loss_prot_logic_->UpdateFrameSize(width, height);
-  loss_prot_logic_->UpdateNumLayers(num_layers);
-  frame_dropper_->Reset();
-  frame_dropper_->SetRates(target_bitrate_kbps, static_cast<float>(frame_rate));
-  user_frame_rate_ = static_cast<float>(frame_rate);
-  codec_width_ = width;
-  codec_height_ = height;
-  num_layers_ = (num_layers <= 1) ? 1 : num_layers;  // Can also be zero.
-  max_payload_size_ = mtu;
-  qm_resolution_->Initialize(target_bitrate_kbps,
-                             user_frame_rate_,
-                             codec_width_,
-                             codec_height_,
-                             num_layers_);
-}
-
-uint32_t MediaOptimization::SetTargetRates(
-    uint32_t target_bitrate,
-    uint8_t fraction_lost,
-    int64_t round_trip_time_ms,
-    VCMProtectionCallback* protection_callback,
-    VCMQMSettingsCallback* qmsettings_callback) {
-  CriticalSectionScoped lock(crit_sect_.get());
-  VCMProtectionMethod* selected_method = loss_prot_logic_->SelectedMethod();
-  float target_bitrate_kbps = static_cast<float>(target_bitrate) / 1000.0f;
-  loss_prot_logic_->UpdateBitRate(target_bitrate_kbps);
-  loss_prot_logic_->UpdateRtt(round_trip_time_ms);
-
-  // Get frame rate for encoder: this is the actual/sent frame rate.
-  float actual_frame_rate = SentFrameRateInternal();
-
-  // Sanity check.
-  if (actual_frame_rate < 1.0) {
-    actual_frame_rate = 1.0;
-  }
-
-  // Update frame rate for the loss protection logic class: frame rate should
-  // be the actual/sent rate.
-  loss_prot_logic_->UpdateFrameRate(actual_frame_rate);
-
-  fraction_lost_ = fraction_lost;
-
-  // Returns the filtered packet loss, used for the protection setting.
-  // The filtered loss may be the received loss (no filter), or some
-  // filtered value (average or max window filter).
-  // Use max window filter for now.
-  FilterPacketLossMode filter_mode = kMaxFilter;
-  uint8_t packet_loss_enc = loss_prot_logic_->FilteredLoss(
-      clock_->TimeInMilliseconds(), filter_mode, fraction_lost);
-
-  // For now use the filtered loss for computing the robustness settings.
-  loss_prot_logic_->UpdateFilteredLossPr(packet_loss_enc);
-
-  // Rate cost of the protection methods.
-  float protection_overhead_rate = 0.0f;
-
-  // Update protection settings, when applicable.
-  float sent_video_rate_kbps = 0.0f;
-  if (loss_prot_logic_->SelectedType() != kNone) {
-    // Update protection method with content metrics.
-    selected_method->UpdateContentMetrics(content_->ShortTermAvgData());
-
-    // Update method will compute the robustness settings for the given
-    // protection method and the overhead cost
-    // the protection method is set by the user via SetVideoProtection.
-    loss_prot_logic_->UpdateMethod();
-
-    // Update protection callback with protection settings.
-    uint32_t sent_video_rate_bps = 0;
-    uint32_t sent_nack_rate_bps = 0;
-    uint32_t sent_fec_rate_bps = 0;
-    // Get the bit cost of protection method, based on the amount of
-    // overhead data actually transmitted (including headers) the last
-    // second.
-    if (protection_callback) {
-      UpdateProtectionCallback(selected_method,
-                               &sent_video_rate_bps,
-                               &sent_nack_rate_bps,
-                               &sent_fec_rate_bps,
-                               protection_callback);
-    }
-    uint32_t sent_total_rate_bps =
-        sent_video_rate_bps + sent_nack_rate_bps + sent_fec_rate_bps;
-    // Estimate the overhead costs of the next second as staying the same
-    // wrt the source bitrate.
-    if (sent_total_rate_bps > 0) {
-      protection_overhead_rate =
-          static_cast<float>(sent_nack_rate_bps + sent_fec_rate_bps) /
-          sent_total_rate_bps;
-    }
-    // Cap the overhead estimate to 50%.
-    if (protection_overhead_rate > 0.5)
-      protection_overhead_rate = 0.5;
-
-    // Get the effective packet loss for encoder ER when applicable. Should be
-    // passed to encoder via fraction_lost.
-    packet_loss_enc = selected_method->RequiredPacketLossER();
-    sent_video_rate_kbps = static_cast<float>(sent_video_rate_bps) / 1000.0f;
-  }
-
-  // Source coding rate: total rate - protection overhead.
-  video_target_bitrate_ = target_bitrate * (1.0 - protection_overhead_rate);
-
-  // Cap target video bitrate to codec maximum.
-  if (max_bit_rate_ > 0 && video_target_bitrate_ > max_bit_rate_) {
-    video_target_bitrate_ = max_bit_rate_;
-  }
-
-  // Update encoding rates following protection settings.
-  float target_video_bitrate_kbps =
-      static_cast<float>(video_target_bitrate_) / 1000.0f;
-  frame_dropper_->SetRates(target_video_bitrate_kbps, incoming_frame_rate_);
-
-  if (enable_qm_ && qmsettings_callback) {
-    // Update QM with rates.
-    qm_resolution_->UpdateRates(target_video_bitrate_kbps,
-                                sent_video_rate_kbps,
-                                incoming_frame_rate_,
-                                fraction_lost_);
-    // Check for QM selection.
-    bool select_qm = CheckStatusForQMchange();
-    if (select_qm) {
-      SelectQuality(qmsettings_callback);
-    }
-    // Reset the short-term averaged content data.
-    content_->ResetShortTermAvgData();
-  }
-
-  CheckSuspendConditions();
-
-  return video_target_bitrate_;
-}
-
-void MediaOptimization::SetProtectionMethod(VCMProtectionMethodEnum method) {
-  CriticalSectionScoped lock(crit_sect_.get());
-  loss_prot_logic_->SetMethod(method);
-}
-
-uint32_t MediaOptimization::InputFrameRate() {
-  CriticalSectionScoped lock(crit_sect_.get());
-  return InputFrameRateInternal();
-}
-
-uint32_t MediaOptimization::InputFrameRateInternal() {
-  ProcessIncomingFrameRate(clock_->TimeInMilliseconds());
-  return uint32_t(incoming_frame_rate_ + 0.5f);
-}
-
-uint32_t MediaOptimization::SentFrameRate() {
-  CriticalSectionScoped lock(crit_sect_.get());
-  return SentFrameRateInternal();
-}
-
-uint32_t MediaOptimization::SentFrameRateInternal() {
-  PurgeOldFrameSamples(clock_->TimeInMilliseconds());
-  UpdateSentFramerate();
-  return avg_sent_framerate_;
-}
-
-uint32_t MediaOptimization::SentBitRate() {
-  CriticalSectionScoped lock(crit_sect_.get());
-  const int64_t now_ms = clock_->TimeInMilliseconds();
-  PurgeOldFrameSamples(now_ms);
-  UpdateSentBitrate(now_ms);
-  return avg_sent_bit_rate_bps_;
-}
-
-int32_t MediaOptimization::UpdateWithEncodedData(
-    const EncodedImage& encoded_image) {
-  size_t encoded_length = encoded_image._length;
-  uint32_t timestamp = encoded_image._timeStamp;
-  CriticalSectionScoped lock(crit_sect_.get());
-  const int64_t now_ms = clock_->TimeInMilliseconds();
-  PurgeOldFrameSamples(now_ms);
-  if (encoded_frame_samples_.size() > 0 &&
-      encoded_frame_samples_.back().timestamp == timestamp) {
-    // Frames having the same timestamp are generated from the same input
-    // frame. We don't want to double count them, but only increment the
-    // size_bytes.
-    encoded_frame_samples_.back().size_bytes += encoded_length;
-    encoded_frame_samples_.back().time_complete_ms = now_ms;
-  } else {
-    encoded_frame_samples_.push_back(
-        EncodedFrameSample(encoded_length, timestamp, now_ms));
-  }
-  UpdateSentBitrate(now_ms);
-  UpdateSentFramerate();
-  if (encoded_length > 0) {
-    const bool delta_frame = encoded_image._frameType != kVideoFrameKey;
-
-    frame_dropper_->Fill(encoded_length, delta_frame);
-    if (max_payload_size_ > 0 && encoded_length > 0) {
-      const float min_packets_per_frame =
-          encoded_length / static_cast<float>(max_payload_size_);
-      if (delta_frame) {
-        loss_prot_logic_->UpdatePacketsPerFrame(min_packets_per_frame,
-                                                clock_->TimeInMilliseconds());
-      } else {
-        loss_prot_logic_->UpdatePacketsPerFrameKey(
-            min_packets_per_frame, clock_->TimeInMilliseconds());
-      }
-
-      if (enable_qm_) {
-        // Update quality select with encoded length.
-        qm_resolution_->UpdateEncodedSize(encoded_length);
-      }
-    }
-    if (!delta_frame && encoded_length > 0) {
-      loss_prot_logic_->UpdateKeyFrameSize(static_cast<float>(encoded_length));
-    }
-
-    // Updating counters.
-    if (delta_frame) {
-      delta_frame_cnt_++;
-    } else {
-      key_frame_cnt_++;
-    }
-  }
-
-  return VCM_OK;
-}
-
-void MediaOptimization::EnableQM(bool enable) {
-  CriticalSectionScoped lock(crit_sect_.get());
-  enable_qm_ = enable;
-}
-
-void MediaOptimization::EnableFrameDropper(bool enable) {
-  CriticalSectionScoped lock(crit_sect_.get());
-  frame_dropper_->Enable(enable);
-}
-
-void MediaOptimization::SuspendBelowMinBitrate(int threshold_bps,
-                                               int window_bps) {
-  CriticalSectionScoped lock(crit_sect_.get());
-  assert(threshold_bps > 0 && window_bps >= 0);
-  suspension_threshold_bps_ = threshold_bps;
-  suspension_window_bps_ = window_bps;
-  suspension_enabled_ = true;
-  video_suspended_ = false;
-}
-
-bool MediaOptimization::IsVideoSuspended() const {
-  CriticalSectionScoped lock(crit_sect_.get());
-  return video_suspended_;
-}
-
-bool MediaOptimization::DropFrame() {
-  CriticalSectionScoped lock(crit_sect_.get());
-  UpdateIncomingFrameRate();
-  // Leak appropriate number of bytes.
-  frame_dropper_->Leak((uint32_t)(InputFrameRateInternal() + 0.5f));
-  if (video_suspended_) {
-    return true;  // Drop all frames when muted.
-  }
-  return frame_dropper_->DropFrame();
-}
-
-void MediaOptimization::UpdateContentData(
-    const VideoContentMetrics* content_metrics) {
-  CriticalSectionScoped lock(crit_sect_.get());
-  // Updating content metrics.
-  if (content_metrics == NULL) {
-    // Disable QM if metrics are NULL.
-    enable_qm_ = false;
-    qm_resolution_->Reset();
-  } else {
-    content_->UpdateContentData(content_metrics);
-  }
-}
-
-void MediaOptimization::UpdateIncomingFrameRate() {
-  int64_t now = clock_->TimeInMilliseconds();
-  if (incoming_frame_times_[0] == 0) {
-    // No shifting if this is the first time.
-  } else {
-    // Shift all times one step.
-    for (int32_t i = (kFrameCountHistorySize - 2); i >= 0; i--) {
-      incoming_frame_times_[i + 1] = incoming_frame_times_[i];
-    }
-  }
-  incoming_frame_times_[0] = now;
-  ProcessIncomingFrameRate(now);
-}
-
-int32_t MediaOptimization::SelectQuality(
-    VCMQMSettingsCallback* video_qmsettings_callback) {
-  // Reset quantities for QM select.
-  qm_resolution_->ResetQM();
-
-  // Update QM will long-term averaged content metrics.
-  qm_resolution_->UpdateContent(content_->LongTermAvgData());
-
-  // Select quality mode.
-  VCMResolutionScale* qm = NULL;
-  int32_t ret = qm_resolution_->SelectResolution(&qm);
-  if (ret < 0) {
-    return ret;
-  }
-
-  // Check for updates to spatial/temporal modes.
-  QMUpdate(qm, video_qmsettings_callback);
-
-  // Reset all the rate and related frame counters quantities.
-  qm_resolution_->ResetRates();
-
-  // Reset counters.
-  last_qm_update_time_ = clock_->TimeInMilliseconds();
-
-  // Reset content metrics.
-  content_->Reset();
-
-  return VCM_OK;
-}
-
-void MediaOptimization::PurgeOldFrameSamples(int64_t now_ms) {
-  while (!encoded_frame_samples_.empty()) {
-    if (now_ms - encoded_frame_samples_.front().time_complete_ms >
-        kBitrateAverageWinMs) {
-      encoded_frame_samples_.pop_front();
-    } else {
-      break;
-    }
-  }
-}
-
-void MediaOptimization::UpdateSentBitrate(int64_t now_ms) {
-  if (encoded_frame_samples_.empty()) {
-    avg_sent_bit_rate_bps_ = 0;
-    return;
-  }
-  size_t framesize_sum = 0;
-  for (FrameSampleList::iterator it = encoded_frame_samples_.begin();
-       it != encoded_frame_samples_.end();
-       ++it) {
-    framesize_sum += it->size_bytes;
-  }
-  float denom = static_cast<float>(
-      now_ms - encoded_frame_samples_.front().time_complete_ms);
-  if (denom >= 1.0f) {
-    avg_sent_bit_rate_bps_ =
-        static_cast<uint32_t>(framesize_sum * 8.0f * 1000.0f / denom + 0.5f);
-  } else {
-    avg_sent_bit_rate_bps_ = framesize_sum * 8;
-  }
-}
-
-void MediaOptimization::UpdateSentFramerate() {
-  if (encoded_frame_samples_.size() <= 1) {
-    avg_sent_framerate_ = encoded_frame_samples_.size();
-    return;
-  }
-  int denom = encoded_frame_samples_.back().timestamp -
-              encoded_frame_samples_.front().timestamp;
-  if (denom > 0) {
-    avg_sent_framerate_ =
-        (90000 * (encoded_frame_samples_.size() - 1) + denom / 2) / denom;
-  } else {
-    avg_sent_framerate_ = encoded_frame_samples_.size();
-  }
-}
-
-bool MediaOptimization::QMUpdate(
-    VCMResolutionScale* qm,
-    VCMQMSettingsCallback* video_qmsettings_callback) {
-  // Check for no change.
-  if (!qm->change_resolution_spatial && !qm->change_resolution_temporal) {
-    return false;
-  }
-
-  // Check for change in frame rate.
-  if (qm->change_resolution_temporal) {
-    incoming_frame_rate_ = qm->frame_rate;
-    // Reset frame rate estimate.
-    memset(incoming_frame_times_, -1, sizeof(incoming_frame_times_));
-  }
-
-  // Check for change in frame size.
-  if (qm->change_resolution_spatial) {
-    codec_width_ = qm->codec_width;
-    codec_height_ = qm->codec_height;
-  }
-
-  LOG(LS_INFO) << "Media optimizer requests the video resolution to be changed "
-                  "to " << qm->codec_width << "x" << qm->codec_height << "@"
-               << qm->frame_rate;
-
-  // Update VPM with new target frame rate and frame size.
-  // Note: use |qm->frame_rate| instead of |_incoming_frame_rate| for updating
-  // target frame rate in VPM frame dropper. The quantity |_incoming_frame_rate|
-  // will vary/fluctuate, and since we don't want to change the state of the
-  // VPM frame dropper, unless a temporal action was selected, we use the
-  // quantity |qm->frame_rate| for updating.
-  video_qmsettings_callback->SetVideoQMSettings(
-      qm->frame_rate, codec_width_, codec_height_);
-  content_->UpdateFrameRate(qm->frame_rate);
-  qm_resolution_->UpdateCodecParameters(
-      qm->frame_rate, codec_width_, codec_height_);
-  return true;
-}
-
-// Check timing constraints and look for significant change in:
-// (1) scene content,
-// (2) target bit rate.
-bool MediaOptimization::CheckStatusForQMchange() {
-  bool status = true;
-
-  // Check that we do not call QMSelect too often, and that we waited some time
-  // (to sample the metrics) from the event last_change_time
-  // last_change_time is the time where user changed the size/rate/frame rate
-  // (via SetEncodingData).
-  int64_t now = clock_->TimeInMilliseconds();
-  if ((now - last_qm_update_time_) < kQmMinIntervalMs ||
-      (now - last_change_time_) < kQmMinIntervalMs) {
-    status = false;
-  }
-
-  return status;
-}
-
-// Allowing VCM to keep track of incoming frame rate.
-void MediaOptimization::ProcessIncomingFrameRate(int64_t now) {
-  int32_t num = 0;
-  int32_t nr_of_frames = 0;
-  for (num = 1; num < (kFrameCountHistorySize - 1); ++num) {
-    if (incoming_frame_times_[num] <= 0 ||
-        // don't use data older than 2 s
-        now - incoming_frame_times_[num] > kFrameHistoryWinMs) {
-      break;
-    } else {
-      nr_of_frames++;
-    }
-  }
-  if (num > 1) {
-    const int64_t diff =
-        incoming_frame_times_[0] - incoming_frame_times_[num - 1];
-    incoming_frame_rate_ = 0.0;  // No frame rate estimate available.
-    if (diff > 0) {
-      incoming_frame_rate_ = nr_of_frames * 1000.0f / static_cast<float>(diff);
-    }
-  }
-}
-
-void MediaOptimization::CheckSuspendConditions() {
-  // Check conditions for SuspendBelowMinBitrate. |video_target_bitrate_| is in
-  // bps.
-  if (suspension_enabled_) {
-    if (!video_suspended_) {
-      // Check if we just went below the threshold.
-      if (video_target_bitrate_ < suspension_threshold_bps_) {
-        video_suspended_ = true;
-      }
-    } else {
-      // Video is already suspended. Check if we just went over the threshold
-      // with a margin.
-      if (video_target_bitrate_ >
-          suspension_threshold_bps_ + suspension_window_bps_) {
-        video_suspended_ = false;
-      }
-    }
-  }
-}
-
-}  // namespace media_optimization
-}  // namespace webrtc