webrtc/modules/video_coding/main/source/frame_buffer.h

/*
 *  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 WEBRTC_MODULES_VIDEO_CODING_MAIN_SOURCE_FRAME_BUFFER_H_
#define WEBRTC_MODULES_VIDEO_CODING_MAIN_SOURCE_FRAME_BUFFER_H_

#include "webrtc/modules/interface/module_common_types.h"
#include "webrtc/modules/video_coding/main/interface/video_coding.h"
#include "webrtc/modules/video_coding/main/source/encoded_frame.h"
#include "webrtc/modules/video_coding/main/source/jitter_buffer_common.h"
#include "webrtc/modules/video_coding/main/source/session_info.h"
#include "webrtc/typedefs.h"

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;
  // Get current state and timestamp of frame
  VCMFrameBufferStateEnum GetState(uint32_t& timeStamp) const;
  void PrepareForDecode(bool continuous);

  bool IsRetransmitted() const;
  bool IsSessionComplete() const;
  bool HaveFirstPacket() const;
  bool HaveLastPacket() const;
  int NumPackets() const;
  // Makes sure the session contain a decodable stream.
  void MakeSessionDecodable();

  // 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;
  bool NonReference() const;

  // Set counted status (as counted by JB or not)
  void SetCountedFrame(bool frameCounted);
  bool GetCountedFrame() const;

  // 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;
  void SetPreviousFrameLoss();

  // The number of packets discarded because the decoder can't make use of
  // them.
  int NotDecodablePackets() const;

 private:
  void SetState(VCMFrameBufferStateEnum state);  // Set state of frame

  VCMFrameBufferStateEnum    _state;         // Current state of the frame
  bool                       _frameCounted;  // Was this frame counted by JB?
  VCMSessionInfo             _sessionInfo;
  uint16_t             _nackCount;
  int64_t              _latestPacketTimeMs;
};

}  // namespace webrtc

#endif  // WEBRTC_MODULES_VIDEO_CODING_MAIN_SOURCE_FRAME_BUFFER_H_