Add 120ms frame ability to ANA

webrtc/modules/audio_coding/audio_network_adaptor/controller_manager.cc

Index: webrtc/modules/audio_coding/audio_network_adaptor/controller_manager.cc
diff --git a/webrtc/modules/audio_coding/audio_network_adaptor/controller_manager.cc b/webrtc/modules/audio_coding/audio_network_adaptor/controller_manager.cc
index 31eff216890882ecc0b2496914d45b312a5cd831..be5150e83bf40770aefab75d977d72107c4e72af 100644
--- a/webrtc/modules/audio_coding/audio_network_adaptor/controller_manager.cc
+++ b/webrtc/modules/audio_coding/audio_network_adaptor/controller_manager.cc
@@ -81,12 +81,29 @@ std::unique_ptr<FrameLengthController> CreateFrameLengthController(
   RTC_CHECK(config.has_fl_20ms_to_60ms_bandwidth_bps());
   RTC_CHECK(config.has_fl_60ms_to_20ms_bandwidth_bps());
 
+  std::map<FrameLengthController::FrameLengthChange, int>
+      frame_length_change_criteria;
+  frame_length_change_criteria.insert(
+      std::make_pair(FrameLengthController::FrameLengthChange(20, 60),
+                     config.fl_20ms_to_60ms_bandwidth_bps()));
+  frame_length_change_criteria.insert(
+      std::make_pair(FrameLengthController::FrameLengthChange(60, 20),
+                     config.fl_60ms_to_20ms_bandwidth_bps()));
+  if (config.has_fl_60ms_to_120ms_bandwidth_bps() &&
+      config.has_fl_120ms_to_60ms_bandwidth_bps()) {
+    frame_length_change_criteria.insert(
+        std::make_pair(FrameLengthController::FrameLengthChange(60, 120),
+                       config.fl_60ms_to_120ms_bandwidth_bps()));
+    frame_length_change_criteria.insert(
+        std::make_pair(FrameLengthController::FrameLengthChange(120, 60),
+                       config.fl_120ms_to_60ms_bandwidth_bps()));
+  }
+
   FrameLengthController::Config ctor_config(
       std::vector<int>(), initial_frame_length_ms,
       config.fl_increasing_packet_loss_fraction(),
       config.fl_decreasing_packet_loss_fraction(),
-      config.fl_20ms_to_60ms_bandwidth_bps(),
-      config.fl_60ms_to_20ms_bandwidth_bps());
+      frame_length_change_criteria);
 
   for (auto frame_length : encoder_frame_lengths_ms)
     ctor_config.encoder_frame_lengths_ms.push_back(frame_length);