1 files changed, 69 insertions, 0 deletions
diff --git a/third_party/libwebrtc/video/encoder_rtcp_feedback.h b/third_party/libwebrtc/video/encoder_rtcp_feedback.h
new file mode 100644
index 0000000000..c66a94503e
--- /dev/null
+++ b/third_party/libwebrtc/video/encoder_rtcp_feedback.h
@@ -0,0 +1,69 @@
+/*
+ *  Copyright (c) 2012 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.
+ */
+#ifndef VIDEO_ENCODER_RTCP_FEEDBACK_H_
+#define VIDEO_ENCODER_RTCP_FEEDBACK_H_
+
+#include <functional>
+#include <vector>
+
+#include "api/sequence_checker.h"
+#include "api/units/time_delta.h"
+#include "api/units/timestamp.h"
+#include "call/rtp_video_sender_interface.h"
+#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
+#include "rtc_base/system/no_unique_address.h"
+#include "system_wrappers/include/clock.h"
+#include "video/video_stream_encoder_interface.h"
+
+namespace webrtc {
+
+class VideoStreamEncoderInterface;
+
+// This class passes feedback (such as key frame requests or loss notifications)
+// from the RtpRtcp module.
+class EncoderRtcpFeedback : public RtcpIntraFrameObserver,
+                            public RtcpLossNotificationObserver {
+ public:
+  EncoderRtcpFeedback(
+      Clock* clock,
+      const std::vector<uint32_t>& ssrcs,
+      VideoStreamEncoderInterface* encoder,
+      std::function<std::vector<RtpSequenceNumberMap::Info>(
+          uint32_t ssrc,
+          const std::vector<uint16_t>& seq_nums)> get_packet_infos);
+  ~EncoderRtcpFeedback() override = default;
+
+  void OnReceivedIntraFrameRequest(uint32_t ssrc) override;
+
+  // Implements RtcpLossNotificationObserver.
+  void OnReceivedLossNotification(uint32_t ssrc,
+                                  uint16_t seq_num_of_last_decodable,
+                                  uint16_t seq_num_of_last_received,
+                                  bool decodability_flag) override;
+
+ private:
+  Clock* const clock_;
+  const std::vector<uint32_t> ssrcs_;
+  const std::function<std::vector<RtpSequenceNumberMap::Info>(
+      uint32_t ssrc,
+      const std::vector<uint16_t>& seq_nums)>
+      get_packet_infos_;
+  VideoStreamEncoderInterface* const video_stream_encoder_;
+
+  RTC_NO_UNIQUE_ADDRESS SequenceChecker packet_delivery_queue_;
+  Timestamp time_last_packet_delivery_queue_
+      RTC_GUARDED_BY(packet_delivery_queue_);
+
+  const TimeDelta min_keyframe_send_interval_;
+};
+
+}  // namespace webrtc
+
+#endif  // VIDEO_ENCODER_RTCP_FEEDBACK_H_