1 files changed, 55 insertions, 0 deletions
diff --git a/third_party/libwebrtc/media/engine/unhandled_packets_buffer.h b/third_party/libwebrtc/media/engine/unhandled_packets_buffer.h
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index 0000000000..63a6195c46
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+++ b/third_party/libwebrtc/media/engine/unhandled_packets_buffer.h
@@ -0,0 +1,55 @@
+/*
+ *  Copyright (c) 2019 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 MEDIA_ENGINE_UNHANDLED_PACKETS_BUFFER_H_
+#define MEDIA_ENGINE_UNHANDLED_PACKETS_BUFFER_H_
+
+#include <stdint.h>
+
+#include <functional>
+#include <tuple>
+#include <utility>
+#include <vector>
+
+#include "rtc_base/copy_on_write_buffer.h"
+
+namespace cricket {
+
+class UnhandledPacketsBuffer {
+ public:
+  // Visible for testing.
+  static constexpr size_t kMaxStashedPackets = 50;
+
+  UnhandledPacketsBuffer();
+  ~UnhandledPacketsBuffer();
+
+  // Store packet in buffer.
+  void AddPacket(uint32_t ssrc,
+                 int64_t packet_time_us,
+                 rtc::CopyOnWriteBuffer packet);
+
+  // Feed all packets with `ssrcs` into `consumer`.
+  void BackfillPackets(
+      rtc::ArrayView<const uint32_t> ssrcs,
+      std::function<void(uint32_t, int64_t, rtc::CopyOnWriteBuffer)> consumer);
+
+ private:
+  size_t insert_pos_ = 0;
+  struct PacketWithMetadata {
+    uint32_t ssrc;
+    int64_t packet_time_us;
+    rtc::CopyOnWriteBuffer packet;
+  };
+  std::vector<PacketWithMetadata> buffer_;
+};
+
+}  // namespace cricket
+
+#endif  // MEDIA_ENGINE_UNHANDLED_PACKETS_BUFFER_H_