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      1 /* ------------------------------------------------------------------
      2  * Copyright (C) 1998-2009 PacketVideo
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
     13  * express or implied.
     14  * See the License for the specific language governing permissions
     15  * and limitations under the License.
     16  * -------------------------------------------------------------------
     17  */
     18 #if !defined(LEVEL1_H)
     19 #define LEVEL1_H
     20 #include "pduparcom.h"
     21 
     22 #define LEVEL1_STUFFING_SZ 2
     23 #define LEVEL1DF_STUFFING_SZ 4
     24 #define LEVEL1_HDR_SZ 3
     25 #define LEVEL1DF_HDR_SZ 5
     26 
     27 class Level1PduParcom : public H223PduParcomBase
     28 {
     29     public:
     30         typedef enum
     31         {
     32             ELookForStartFlag = 0,
     33             ESkipFlags,
     34             ELookForEndFlag
     35         } EOperationId;
     36 
     37         Level1PduParcom(bool df = false);
     38         ~Level1PduParcom()
     39         {
     40         }
     41         TPVH223Level GetLevel()
     42         {
     43             return H223_LEVEL1;
     44         }
     45 
     46         bool UseDf(bool df)
     47         {
     48             bool ret = iDf;
     49             iDf = df;
     50             return ret;
     51         }
     52         uint32 GetStuffing(uint8* buf, uint32 buf_size, uint8 mux_code = 0);
     53         uint32 GetHeaderSz()
     54         {
     55             return (uint16)((iDf) ? LEVEL1DF_HDR_SZ : LEVEL1_HDR_SZ);
     56         }
     57         uint32 GetStuffingSz()
     58         {
     59             return (uint16)((iDf) ? LEVEL1DF_STUFFING_SZ : LEVEL1_STUFFING_SZ);
     60         }
     61         uint32 Parse(uint8* bsbuf, uint32 bsbsz);
     62         PVMFStatus CompletePdu(OsclSharedPtr<PVMFMediaDataImpl>& pdu, int8 mt, uint8 pm);
     63     protected:
     64         void Construct(uint16 max_outstanding_pdus);
     65         void GetHdrFragment(OsclRefCounterMemFrag& frag);
     66     private:
     67         inline bool CheckForFlag(uint8* bsbuf)
     68         {
     69             if (iDf)
     70                 return (bsbuf[0] == 0xe1 && bsbuf[1] == 0x4d && bsbuf[2] == 0xe1 && bsbuf[3] == 0x4d);
     71             return (bsbuf[0] == 0xe1 && bsbuf[1] == 0x4d);
     72         }
     73         inline void IndicatePdu();
     74 
     75         PVMFBufferPoolAllocator iHdrFragmentAlloc;
     76 
     77         uint8 iHecCrc[20];
     78         bool iDf;
     79         int iCurrentInt32;
     80         int iSkipBytes;
     81         int iClosingNext;
     82         EOperationId iCurrentOp;
     83 };
     84 
     85 #endif
     86 
     87