Added framer to cast.

media/cast/framer/frame_id_map.h

+// 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.
+
+#ifndef MEDIA_CAST_FRAMER_FRAME_ID_MAP_H_
+#define MEDIA_CAST_FRAMER_FRAME_ID_MAP_H_
+
+#include <map>
+#include <set>
+
+#include "base/memory/scoped_ptr.h"
+#include "media/cast/cast_config.h"
+#include "media/cast/rtp_common/rtp_defines.h"
+
+namespace media {
+namespace cast {
+
+class FrameInfo {
+ public:
+  FrameInfo(uint8 frame_id,
+            uint8 referenced_frame_id,
+            uint16 max_packet_id,
+            bool key_frame);
+  ~FrameInfo();
+
+  // Returns true if frame is complete after the insert.
+  bool InsertPacket(uint16 packet_id);
+  bool Complete() const;
+  void GetMissingPackets(bool newest_frame,
+                         std::set<uint16>* missing_packets) const;
+
+  bool is_key_frame() const { return is_key_frame_; }
+  uint8_t frame_id() const { return frame_id_; }
+  uint8_t referenced_frame_id() const { return referenced_frame_id_; }
+
+ private:
+  const bool is_key_frame_;
+  const uint8 frame_id_;
+  const uint8 referenced_frame_id_;
+
+  uint16 max_received_packet_id_;
+  std::set<uint16> missing_packets_;

[Alpha Left Google, 2013/08/28 00:27:31]

I suggest a typedef for this, e.g. PacketIdSet.

[pwestin, 2013/08/28 16:40:44]

Done.

+
+  DISALLOW_COPY_AND_ASSIGN(FrameInfo);
+};
+
+typedef std::map<uint8, FrameInfo*> FrameMap;

[Alpha Left Google, 2013/08/28 00:27:31]

Use std::map<uint8, linked_ptr<FrameInfo> > instead of a raw pointer.

See description here:
https://code.google.com/p/chromium/codesearch#chromium/src/base/memory/linked...

It is used inside STL containers which is the perfect use here.

[pwestin, 2013/08/28 16:40:44]

Done.

+
+class FrameIdMap {
+ public:
+  FrameIdMap();
+  ~FrameIdMap();
+
+  // Returns false if not a valid (old) packet, otherwise returns true.
+  bool InsertPacket(const RtpCastHeader& rtp_header, bool* complete);
+
+  bool Empty() const;
+  bool FrameExists(uint8 frame_id) const;
+  uint8 NewestFrameId() const;
+
+  void RemoveOldFrames(uint8 frame_id);
+  void Clear();
+
+  // Identifies the next frame to be released (rendered).
+  bool NextContinuousFrame(uint8* frame_id) const;
+  uint8_t LastContinuousFrame() const;

[Alpha Left Google, 2013/08/28 00:27:31]

Should be uint8.

[pwestin, 2013/08/28 16:40:44]

Done.

+
+  bool NextAudioFrameAllowingMissingFrames(uint8* frame_id) const;
+  bool NextVideoFrameAllowingSkippingFrames(uint8* frame_id) const;
+
+  int NumberOfCompleteFrames() const;
+  void GetMissingPackets(uint8 frame_id,
+                         bool last_frame,
+                         std::set<uint16>* missing_packets) const;
+
+ private:
+  bool ContinuousFrame(FrameInfo* frame) const;
+  bool DecodableVideoFrame(FrameInfo* frame) const;
+
+  FrameMap frame_map_;
+  bool waiting_for_key_;
+  uint8 last_released_frame_;
+  uint8 newest_frame_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(FrameIdMap);
+};
+
+}  //  namespace cast
+}  //  namespace media
+
+#endif  // MEDIA_CAST_FRAMER_FRAME_ID_MAP_H_