Implementing auto pausing of video streams.

webrtc/call/call.cc

Index: webrtc/call/call.cc
diff --git a/webrtc/call/call.cc b/webrtc/call/call.cc
index e3c6ec7a0ccb5443e69dabb02dcb11f39f2460e0..0ac5a0f1e11c26f867b7127da1230733e352746d 100644
--- a/webrtc/call/call.cc
+++ b/webrtc/call/call.cc
@@ -10,6 +10,7 @@
 
 #include <string.h>
 
+#include <algorithm>
 #include <map>
 #include <memory>
 #include <vector>
@@ -700,6 +701,10 @@ void Call::OnNetworkChanged(uint32_t target_bitrate_bps, uint8_t fraction_loss,
     pacer_bitrate_sum_kbits_ += pacer_bitrate_bps / 1000;
     ++num_bitrate_updates_;
   }
+
+  // Make sure to not ask for more padding than the current BWE allows for.
+  pad_up_to_bitrate_bps = std::min(static_cast<uint32_t>(pad_up_to_bitrate_bps),
+                                   target_bitrate_bps);
   congestion_controller_->SetAllocatedSendBitrate(allocated_bitrate_bps,
                                                   pad_up_to_bitrate_bps);
 }