Dont request keyframes if the stream is inactive or if we are currently receiving a keyframe.

webrtc/modules/video_coding/packet_buffer.h

 /*
  *  Copyright (c) 2016 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.
  */
 
@@ skipping 37 matching lines @@
 
   virtual ~PacketBuffer();
 
   // Returns true if |packet| is inserted into the packet buffer, false
   // otherwise. The PacketBuffer will always take ownership of the
   // |packet.dataPtr| when this function is called. Made virtual for testing.
   virtual bool InsertPacket(VCMPacket* packet);
   void ClearTo(uint16_t seq_num);
   void Clear();
 
+  // Timestamp (not RTP timestamp) of the last received packet/keyframe packet.
+  rtc::Optional<int64_t> LastReceivedPacketMs() const;
+  rtc::Optional<int64_t> LastReceivedKeyframePacketMs() const;
+
   int AddRef() const;
   int Release() const;
 
  protected:
   // Both |start_buffer_size| and |max_buffer_size| must be a power of 2.
   PacketBuffer(Clock* clock,
                size_t start_buffer_size,
                size_t max_buffer_size,
                OnReceivedFrameCallback* frame_callback);
 
@@ skipping 67 matching lines @@
   // Buffer that holds the inserted packets.
   std::vector<VCMPacket> data_buffer_ GUARDED_BY(crit_);
 
   // Buffer that holds the information about which slot that is currently in use
   // and information needed to determine the continuity between packets.
   std::vector<ContinuityInfo> sequence_buffer_ GUARDED_BY(crit_);
 
   // Called when a received frame is found.
   OnReceivedFrameCallback* const received_frame_callback_;
 
+  // Timestamp (not RTP timestamp) of the last received packet/keyframe packet.
+  rtc::Optional<int64_t> last_received_packet_ms_ GUARDED_BY(crit_);
+  rtc::Optional<int64_t> last_received_keyframe_packet_ms_ GUARDED_BY(crit_);
+
   mutable volatile int ref_count_ = 0;
 };
 
 }  // namespace video_coding
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_VIDEO_CODING_PACKET_BUFFER_H_