www.pudn.com > openh323-v1_15_1-src.zip > rfc2833.h

/* 
 * rfc2833.h 
 * 
 * Open Phone Abstraction Library (OPAL) 
 * Formally known as the Open H323 project. 
 * 
 * Copyright (c) 2001 Equivalence Pty. Ltd. 
 * 
 * The contents of this file are subject to the Mozilla Public License 
 * Version 1.0 (the "License"); you may not use this file except in 
 * compliance with the License. You may obtain a copy of the License at 
 * http://www.mozilla.org/MPL/ 
 * 
 * Software distributed under the License is distributed on an "AS IS" 
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See 
 * the License for the specific language governing rights and limitations 
 * under the License. 
 * 
 * The Original Code is Open Phone Abstraction Library. 
 * 
 * The Initial Developer of the Original Code is Equivalence Pty. Ltd. 
 * 
 * Contributor(s): ______________________________________. 
 * 
 * $Log: rfc2833.h,v $ 
 * Revision 1.3  2002/09/16 01:14:15  robertj 
 * Added #define so can select if #pragma interface/implementation is used on 
 *   platform basis (eg MacOS) rather than compiler, thanks Robert Monaghan. 
 * 
 * Revision 1.2  2002/09/03 06:19:37  robertj 
 * Normalised the multi-include header prevention ifdef/define symbol. 
 * 
 * Revision 1.1  2002/01/23 05:06:23  robertj 
 * Added RFC2833 support as separate class 
 * 
 */ 
 
#ifndef __OPAL_RFC2833_H 
#define __OPAL_RFC2833_H 
 
#ifdef P_USE_PRAGMA 
#pragma interface 
#endif 
 
 
#include "rtp.h" 
 
 
/////////////////////////////////////////////////////////////////////////////// 
 
class OpalRFC2833Info : public PObject { 
    PCLASSINFO(OpalRFC2833Info, PObject); 
  public: 
    OpalRFC2833Info( 
      char tone, 
      unsigned duration = 0, 
      unsigned timestamp = 0 
    ); 
 
    char GetTone() const { return tone; } 
    unsigned GetDuration() const { return duration; } 
    unsigned GetTimestamp() const { return timestamp; } 
    BOOL IsToneStart() const { return duration == 0; } 
 
  protected: 
    char     tone; 
    unsigned duration; 
    unsigned timestamp; 
}; 
 
 
class OpalRFC2833 : public PObject { 
    PCLASSINFO(OpalRFC2833, PObject); 
  public: 
    OpalRFC2833( 
      const PNotifier & receiveNotifier 
    ); 
 
    virtual BOOL SendTone( 
      char tone,              /// DTMF tone code 
      unsigned duration       /// Duration of tone in milliseconds 
    ); 
 
    virtual BOOL BeginTransmit( 
      char tone  /// DTMF tone code 
    ); 
    virtual BOOL EndTransmit(); 
 
    virtual void OnStartReceive( 
      char tone 
    ); 
    virtual void OnEndReceive( 
      char tone, 
      unsigned duration, 
      unsigned timestamp 
    ); 
 
    RTP_DataFrame::PayloadTypes GetPayloadType() const { return payloadType; } 
 
    void SetPayloadType( 
      RTP_DataFrame::PayloadTypes type /// new payload type 
    ) { payloadType = type; } 
 
    const PNotifier & GetReceiveHandler() const { return receiveHandler; } 
    const PNotifier & GetTransmitHandler() const { return transmitHandler; } 
 
  protected: 
    PDECLARE_NOTIFIER(RTP_DataFrame, OpalRFC2833, ReceivedPacket); 
    PDECLARE_NOTIFIER(RTP_DataFrame, OpalRFC2833, TransmitPacket); 
    PDECLARE_NOTIFIER(PTimer, OpalRFC2833, ReceiveTimeout); 
    PDECLARE_NOTIFIER(PTimer, OpalRFC2833, TransmitEnded); 
 
    RTP_DataFrame::PayloadTypes payloadType; 
 
    PMutex mutex; 
 
    PNotifier receiveNotifier; 
    BOOL      receiveComplete; 
    BYTE      receivedTone; 
    unsigned  receivedDuration; 
    unsigned  receiveTimestamp; 
    PTimer    receiveTimer; 
    PNotifier receiveHandler; 
 
    enum { 
      TransmitIdle, 
      TransmitActive, 
      TransmitEnding 
    }         transmitState; 
    BYTE      transmitCode; 
    unsigned  transmitTimestamp; 
    PTimer    transmitTimer; 
    PNotifier transmitHandler; 
}; 
 
 
#endif // __OPAL_RFC2833_H 
 
 
/////////////////////////////////////////////////////////////////////////////