1 files changed, 65 insertions, 0 deletions
diff --git a/chromium/media/cast/transport/rtp_sender/packet_storage/packet_storage.cc b/chromium/media/cast/transport/rtp_sender/packet_storage/packet_storage.cc
new file mode 100644
index 00000000000..a748baa27ab
--- /dev/null
+++ b/chromium/media/cast/transport/rtp_sender/packet_storage/packet_storage.cc
@@ -0,0 +1,65 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "media/cast/transport/rtp_sender/packet_storage/packet_storage.h"
+
+#include <string>
+
+#include "base/logging.h"
+
+namespace media {
+namespace cast {
+namespace transport {
+
+PacketStorage::PacketStorage(size_t stored_frames)
+    : max_stored_frames_(stored_frames),
+      first_frame_id_in_list_(0),
+      last_frame_id_in_list_(0) {
+}
+
+PacketStorage::~PacketStorage() {
+}
+
+bool PacketStorage::IsValid() const {
+  return max_stored_frames_ > 0 &&
+      static_cast<int>(max_stored_frames_) <= kMaxUnackedFrames;
+}
+
+size_t PacketStorage::GetNumberOfStoredFrames() const {
+  return frames_.size();
+}
+
+void PacketStorage::StoreFrame(uint32 frame_id,
+                               const SendPacketVector& packets) {
+  if (frames_.empty()) {
+    first_frame_id_in_list_ = frame_id;
+  } else {
+    // Make sure frame IDs are consecutive.
+    DCHECK_EQ(last_frame_id_in_list_ + 1, frame_id);
+  }
+
+  // Save new frame to the end of the list.
+  last_frame_id_in_list_ = frame_id;
+  frames_.push_back(packets);
+
+  // Evict the oldest frame if the list is too long.
+  if (frames_.size() > max_stored_frames_) {
+    frames_.pop_front();
+    ++first_frame_id_in_list_;
+  }
+}
+
+const SendPacketVector* PacketStorage::GetFrame8(uint8 frame_id_8bits) const {
+  // The requested frame ID has only 8-bits so convert the first frame ID
+  // in list to match.
+  uint8 index_8bits = first_frame_id_in_list_ & 0xFF;
+  index_8bits = frame_id_8bits - index_8bits;
+  if (index_8bits >= frames_.size())
+    return NULL;
+  return &(frames_[index_8bits]);
+}
+
+}  // namespace transport
+}  // namespace cast
+}  // namespace media