git-svn-id: http://webrtc.googlecode.com/svn/trunk@4 4adac7df-926f-26a2-2b94-8c16560cd09d

2011-05-30 11:22:19 +00:00
parent 01813fe945
commit 77ae29bc81
1153 changed files with 404089 additions and 0 deletions
--- a/modules/video_coding/main/source/session_info.h
+++ b/modules/video_coding/main/source/session_info.h
@@ -0,0 +1,94 @@
+/*
+ *  Copyright (c) 2011 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_SESSION_INFO_H_
+#define WEBRTC_MODULES_VIDEO_CODING_SESSION_INFO_H_
+
+#include "typedefs.h"
+#include "module_common_types.h"
+#include "packet.h"
+
+namespace webrtc
+{
+
+class VCMSessionInfo
+{
+public:
+    VCMSessionInfo();
+    virtual ~VCMSessionInfo();
+
+    VCMSessionInfo(const VCMSessionInfo& rhs);
+
+    WebRtc_Word32 ZeroOutSeqNum(WebRtc_Word32* list, WebRtc_Word32 num);
+    virtual void Reset();
+
+    WebRtc_Word64 InsertPacket(const VCMPacket& packet, WebRtc_UWord8* ptrStartOfLayer);
+
+    virtual bool IsSessionComplete();
+    WebRtc_UWord32 MakeSessionDecodable(WebRtc_UWord8* ptrStartOfLayer);
+
+    WebRtc_UWord32 GetSessionLength();
+    bool HaveLastPacket();
+    void ForceSetHaveLastPacket();
+    bool IsRetransmitted();
+    webrtc::FrameType FrameType() const { return _frameType; }
+
+    virtual WebRtc_Word32 GetHighestPacketIndex();
+    virtual WebRtc_UWord32 GetPacketSize(WebRtc_Word32 packetIndex);
+    virtual void ClearPacketSize(WebRtc_Word32 packetIndex);
+    virtual void UpdatePacketSize(WebRtc_Word32 packetIndex, WebRtc_UWord32 length);
+    virtual void PrependPacketIndices(WebRtc_Word32 numberOfPacketIndexes);
+
+    void SetStartSeqNumber(WebRtc_UWord16 seqNumber);
+
+    bool HaveStartSeqNumber();
+
+    WebRtc_Word32 GetLowSeqNum() const;
+    WebRtc_Word32 GetHighSeqNum() const;
+
+    WebRtc_UWord32 PrepareForDecode(WebRtc_UWord8* ptrStartOfLayer, VideoCodecType codec);
+
+    void SetPreviousFrameLoss() { _previousFrameLoss = true; }
+    bool PreviousFrameLoss() const { return _previousFrameLoss; }
+
+protected:
+    WebRtc_UWord32 InsertBuffer(WebRtc_UWord8* ptrStartOfLayer,
+                                WebRtc_Word32 packetIndex,
+                                const VCMPacket& packet);
+    void FindNaluBorder(WebRtc_Word32 packetIndex,
+                        WebRtc_Word32& startIndex,
+                        WebRtc_Word32& endIndex);
+    WebRtc_UWord32 DeletePackets(WebRtc_UWord8* ptrStartOfLayer,
+                                 WebRtc_Word32 startIndex,
+                                 WebRtc_Word32 endIndex);
+    void UpdateCompleteSession();
+
+    bool _haveFirstPacket;      // If we have inserted the first packet into this frame
+    bool _markerBit;            // If we have inserted a packet with markerbit into this frame
+    bool _sessionNACK;          // If this session has been NACKed by JB
+    bool _completeSession;
+    webrtc::FrameType  _frameType;
+    bool           _previousFrameLoss;
+
+    WebRtc_Word32  _lowSeqNum;          // Lowest packet sequence number in a session
+    WebRtc_Word32  _highSeqNum;         // Highest packet sequence number in a session
+
+    // Highest packet index in this frame
+    WebRtc_UWord16 _highestPacketIndex;
+    // Length of packet (used for reordering)
+    WebRtc_UWord32 _packetSizeBytes[kMaxPacketsInJitterBuffer];
+    // Completness of packets. Used for deciding if the frame is decodable.
+    WebRtc_UWord8  _naluCompleteness[kMaxPacketsInJitterBuffer];
+    bool           _ORwithPrevByte[kMaxPacketsInJitterBuffer];
+};
+
+} // namespace webrtc
+
+#endif // WEBRTC_MODULES_VIDEO_CODING_SESSION_INFO_H_