Fixes a bug where a video stream can get stuck in the suspended state.

webrtc/call/rampup_tests.h

Index: webrtc/call/rampup_tests.h
diff --git a/webrtc/call/rampup_tests.h b/webrtc/call/rampup_tests.h
index 5cf4c4fab506932d30b16dc1117c441d4e09fb9d..65276ea265c820c37389ac947f4462332619a990 100644
--- a/webrtc/call/rampup_tests.h
+++ b/webrtc/call/rampup_tests.h
@@ -33,6 +33,7 @@ class RampUpTester : public test::EndToEndTest {
  public:
   RampUpTester(size_t num_video_streams,
                size_t num_audio_streams,
+               size_t num_flexfec_streams,
                unsigned int start_bitrate_bps,
                int64_t min_run_time_ms,
                const std::string& extension_type,
@@ -43,6 +44,7 @@ class RampUpTester : public test::EndToEndTest {
 
   size_t GetNumVideoStreams() const override;
   size_t GetNumAudioStreams() const override;
+  size_t GetNumFlexfecStreams() const override;
 
   void PerformTest() override;
 
@@ -66,6 +68,7 @@ class RampUpTester : public test::EndToEndTest {
   FakeNetworkPipe::Config forward_transport_config_;
   const size_t num_video_streams_;
   const size_t num_audio_streams_;
+  const size_t num_flexfec_streams_;
   const bool rtx_;
   const bool red_;
   Call* sender_call_;
@@ -88,6 +91,8 @@ class RampUpTester : public test::EndToEndTest {
   void ModifyAudioConfigs(
       AudioSendStream::Config* send_config,
       std::vector<AudioReceiveStream::Config>* receive_configs) override;
+  void ModifyFlexfecConfigs(
+      std::vector<FlexfecReceiveStream::Config>* receive_configs) override;
   void OnCallsCreated(Call* sender_call, Call* receiver_call) override;
 
   static bool BitrateStatsPollingThread(void* obj);
@@ -111,29 +116,42 @@ class RampUpDownUpTester : public RampUpTester {
  public:
   RampUpDownUpTester(size_t num_video_streams,
                      size_t num_audio_streams,
+                     size_t num_flexfec_streams,
                      unsigned int start_bitrate_bps,
                      const std::string& extension_type,
                      bool rtx,
-                     bool red);
+                     bool red,
+                     const std::vector<int>& loss_rates);
   ~RampUpDownUpTester() override;
 
  protected:
   bool PollStats() override;
 
  private:
-  enum TestStates { kFirstRampup, kLowRate, kSecondRampup };
+  enum TestStates {
+    kFirstRampup = 0,
+    kLowRate,
+    kSecondRampup,
+    kTestEnd,
+    kTransitionToNextState,
+  };
 
   Call::Config GetReceiverCallConfig() override;
 
   std::string GetModifierString() const;
   int GetExpectedHighBitrate() const;
   int GetHighLinkCapacity() const;
+  size_t GetFecBytes() const;
+  bool ExpectingFec() const;
   void EvolveTestState(int bitrate_bps, bool suspended);
 
+  const std::vector<int> link_rates_;
   TestStates test_state_;
+  TestStates next_state_;
   int64_t state_start_ms_;
   int64_t interval_start_ms_;
   int sent_bytes_;
+  std::vector<int> loss_rates_;
 };
 }  // namespace webrtc
 #endif  // WEBRTC_CALL_RAMPUP_TESTS_H_