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..95ed4d61c3024c28e9930c112ee736f081f493d0 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 +81,28 @@ 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::Config::FrameLengthChange, int>
+      fl_changing_bandwidths_bps = {
+          {FrameLengthController::Config::FrameLengthChange(20, 60),
+           config.fl_20ms_to_60ms_bandwidth_bps()},
+          {FrameLengthController::Config::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()) {
+    fl_changing_bandwidths_bps.insert(std::make_pair(
+        FrameLengthController::Config::FrameLengthChange(60, 120),
+        config.fl_60ms_to_120ms_bandwidth_bps()));
+    fl_changing_bandwidths_bps.insert(std::make_pair(
+        FrameLengthController::Config::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());
+      std::move(fl_changing_bandwidths_bps));
 
   for (auto frame_length : encoder_frame_lengths_ms)
     ctor_config.encoder_frame_lengths_ms.push_back(frame_length);