jb.x

基于h323协议的软phone

/********************************************************************20**

     Name:    JitterBuffer

     Type:    C include file

     Desc:    Structures, variables and typedefs required by H.323
              control layer

     File:    jb.x

     Sid:     jb.x 1.0  -  01/19/2000

     Prg:     sdg

*********************************************************************21*/


#ifndef __JBX__
#define __JBX__

//#include <vector.h>

//#include "VMutex.h"


using namespace std;

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#include <semLib.h>

/* include all the module specific files */

/* typedefs */

/* forward type declarations */


/***********************************************************************
                 Gen Config Structure
 ***********************************************************************/

typedef struct jbGenCfg
{
    Bool    cfgDone;            /* Flag to say if GenCfg is done */
    S16     maxConnections;     /* Max number of active conn */
    S16     maxSize;            /* Max size of buffer in packets
                                    (must be a power of 2) */
} JbGenCfg;


/***********************************************************************
                 Buffer Config Structure
 ***********************************************************************/

typedef struct jbJitterCfg
{
    /* slm: changed maxLatency to 16 bit to be consistent */
    U16     maxLatency;         /* Maximum level the Jitter Buffer
                                    is allowed to fill in packets */
    U16     maxHoldTime;        /* Maximum number of playAttempts to wait
                                    before releasing a packet, represented
                                    as a percentage of the HWM */
    U8      minSize;            /* Minimum size of the Buffer in packets */
    U8      minStableTime;      /* Minimum time the jitter needs to be less
                                    than the HWM before the HWM is reduced */
    U16     incAmount;          /* Used to increase the HWM */
    U16     decAmount;          /* Used to decrease the HWM */
//    TmrCfg  longSilenceTimer;   /* Used to determine the cause of an underflow */
    U16     longSilenceTimer;
} JbJitterCfg;


/***********************************************************************
                 Buffer Structure
 ***********************************************************************/

typedef struct jBuf
{
    U32     seqNum;             /* sequence number of packet. */
    U32     len;                /* slm: length of data in buffer.
                                    This equals 0 if empty */
    Ticks   timeStamp;          /* timestamp of packet */
    Data    *buffer;            /* pointer to data buffer */
} JBuf;


/***********************************************************************
                 Jitter Structure
 ***********************************************************************/

typedef struct jitter
{
    U8      p;                  /* play index in buffer */
    U8      q;                  /* put index in buffer */
    U8      maxJitter;          /* max jitter in currentStableTime */
    U8      currentStableTime;  /* time jitter has been less than hwm */
    U8      playAttempts;       /* number playAttempts in ActiveHold state */
    U8      receivePacketCount; /* number of received packets in a row */
    U8      playPacketCount;    /* number of played packet in a row */
    U8      gotFirst;           /* got first pkt */
    U8      bufferDrop;         /* slm: MR4213 flag to indicate dropping buffer */
    U8      bufferCreep;        /* slm: MR4213 counter to watch for buffer creep */
    U16     lastSeqNum;         /* last seq# received */
    U16     maxLatency;         /* max latency in packets */
    U16     dropWait;           /* slm: MR4213 wait count for stable packets before drop */
    U16     maxAlSduFrames;     /* slm: MR4213 max frames */
    Ticks   curTimestamp;       /* slm: MR4213 current timestamp */
    JBuf    *jBuf;              /* pointer to the jitter buffer */
    JbState state;              /* jitter state */
} Jitter;


/***********************************************************************
                 Connection stats
 ***********************************************************************/

typedef struct jbConnSts
{
    S32         packetsTx;          /* Transmitted packets to RTP */
    S32         packetsRx;          /* Received packets from DSP */
    S32         packetsLate;        /* This gets incremented when there
                                        isn't room to put a packet before
                                        the q pointer */
    S32         packetsDropped;     /* Total number of packets dropped */
    S32         packetsLost;        /* This gets incremented when the buffer
                                        tries to play an empty packet */
    S32         packetsRedundant;   /* This gets incremented when the
                                        buffer attempts to insert a packet
                                        in a non-empty slot in the buffer */
    S32         breaks;             /* Total number of speech breaks */
    S32         numPackets;         /* Current level of jitter buffer */
    S32         jitterBufferSize;   /* Current High Water Mark */
    S32         currentJitter;
} JbConnSts;


/***********************************************************************
                 Connection key
 ***********************************************************************/

typedef struct jbConnKey
{
    S32         sessionId;          /* ID of current session */
//    SpId        spId;               /* Service provider ID of session */
    CoderInfo   txCodec;            /* Tx Codec type */
    CoderInfo   rxCodec;            /* Rx Codec type */
    S16         lineNo;             /* slm: MR8849 add line number */
} JbConnKey;


/***********************************************************************
                 Jitter Buffer Stats
 ***********************************************************************/

typedef struct jbCbSts
{
    S32         totalConnections;  /* Total connections since init */
    S32         activeConnections; /* Current number of connections */
} JbCbSts;


/***********************************************************************
                 Connection control block
 ***********************************************************************/

typedef struct jbConnCb
{
//   CmHashListEnt    conn;
   U8               connIndex;      /* Index into jbCb connection list */
   JbConnKey        key;            /* Hash list key */
   JbConnSts        sts;            /* Connection stats */
   Jitter           jitter;         /* Buffer Structure */
} JbConnCb;


/***********************************************************************
                 Management Structure
 ***********************************************************************/
typedef struct jbCfg
{
    ConfigType type;                /* type of config request */
    union
    {
        JbGenCfg    genCfg;         /* General Config Structure */
        JbJitterCfg jitterCfg;      /* Buffer Config Structure */
    } c;
} JbCfg;

typedef struct jbSts
{
    StatsType type;                 /* type of stats requested */
    Bool      clearConnSts;         /* Flag to clear conn stats */
    union
    {
        JbCbSts     jbCbSts;        /* Control Block Stats */
        JbConnSts   jbConnSts;      /* Connection Stats */
    } s;
} JbSts;

/***********************************************************************
                       JitterBuffer Global Control Block
 ***********************************************************************/

typedef struct jbCb
{
//   CmHashListCp connHlCp;           /* Hash list containing all active connections */
//   TskInit      jbInit;             /* Init Structure for jb */
   vector<JbConnCb> connHlCp;
   JbGenCfg     genCfg;             /* General config structure */
   JbJitterCfg  jitCfg;             /* Buffer config structure */
   JbCbSts      sts;                /* Jitter Buffer System Stats */
//   JbConnKey    **conn;             /* List of Connection Keys */
//   CmTqCp       jbTqCp;             /* Jitter Buffer Timing Queue Control Point */
//   CmTqType     jbTq[JB_TQSIZE];    /* Jitter Buffer Timing Queue */
//   CmTimer      *jbTimers;          /* Jitter Buffer Timers */
   vector<JbConnKey*> conn;
   vector<int>              jbTimers;
   /* slm: MR8849 now use array of activeConn for multiple lines */
   U8           activeConn[JB_MAX_LINENUMS];    /* Index of Active call in Conn Key List */
   S16          timerRes;
//   VMutex       sem;
	SEM_ID  sem;
   /* slm: MR8849 now use array of dspSem for multiple lines */
//   VMutex       dspSem[JB_MAX_LINENUMS];        /* slm: MR4386 need to protect accesses
//                                        to DSP from multiple writes */
	SEM_ID	dspSem[JB_MAX_LINENUMS];

} JbCb;

/* slm: MR4213 - FIXME - jb structs MUST MATCH hi structs
**               in order for JbReadSocket() to work properly
**               Add JbTxSts struct to match HiTxSts struct
**               Change JbSap struct to match HiSap Struct
**               Change JbConCb struct to match HiConCb struct
**               Whenever hi struct changes - due to Trillium patches -
**               These structures must be updated to match
**               This is not an optimal solution, better way would be
**               to include the HI.X file */
/* Transmit statistics */
//typedef struct jbTxSts
//{
//   StsCntr     numCons;
//   StsCntr     numTxTcpMsg;
//   StsCntr     numTxUdpMsg;
//   StsCntr     numTxbytes;
//#ifdef HI_REL_1_3
//   StsCntr     numTxRawMsg;
//#endif /* HI_REL_1_3 */
//
//} JbTxSts;

/* SAP based on HiSap */
/* This struct MUST match HiSap structure */