text: /*
   *  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 MODULES_VIDEO_CODING_FRAME_BUFFER_H_
  #define MODULES_VIDEO_CODING_FRAME_BUFFER_H_
  
  #include <vector>
  
  #include "modules/include/module_common_types.h"
  #include "modules/video_coding/encoded_frame.h"
  #include "modules/video_coding/include/video_coding.h"
  #include "modules/video_coding/jitter_buffer_common.h"
  #include "modules/video_coding/session_info.h"
  #include "typedefs.h"  // NOLINT(build/include)
  
  namespace webrtc {
  
  class VCMFrameBuffer : public VCMEncodedFrame {
   public:
    VCMFrameBuffer();
    virtual ~VCMFrameBuffer();
  
    VCMFrameBuffer(const VCMFrameBuffer& rhs);
  
    virtual void Reset();
  
    VCMFrameBufferEnum InsertPacket(const VCMPacket& packet,
                                    int64_t timeInMs,
                                    VCMDecodeErrorMode decode_error_mode,
                                    const FrameData& frame_data);
  
    // State
    // Get current state of frame
    VCMFrameBufferStateEnum GetState() const;
    void PrepareForDecode(bool continuous);
  
    bool IsSessionComplete() const;
    bool HaveFirstPacket() const;
    int NumPackets() const;
  
    // Sequence numbers
    // Get lowest packet sequence number in frame
    int32_t GetLowSeqNum() const;
    // Get highest packet sequence number in frame
    int32_t GetHighSeqNum() const;
  
    int PictureId() const;
    int TemporalId() const;
    bool LayerSync() const;
    int Tl0PicId() const;
  
    std::vector<NaluInfo> GetNaluInfos() const;
  
    void SetGofInfo(const GofInfoVP9& gof_info, size_t idx);
  
    // Increments a counter to keep track of the number of packets of this frame
    // which were NACKed before they arrived.
    void IncrementNackCount();
    // Returns the number of packets of this frame which were NACKed before they
    // arrived.
    int16_t GetNackCount() const;
  
    int64_t LatestPacketTimeMs() const;
  
    webrtc::FrameType FrameType() const;
  
   private:
    void SetState(VCMFrameBufferStateEnum state);  // Set state of frame
  
    VCMFrameBufferStateEnum _state;  // Current state of the frame
    VCMSessionInfo _sessionInfo;
    uint16_t _nackCount;
    int64_t _latestPacketTimeMs;
  };
  
  }  // namespace webrtc
  
  #endif  // MODULES_VIDEO_CODING_FRAME_BUFFER_H_
  