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/*
* gsmcodec.h
*
* H.323 protocol handler
*
* Open H323 Library
*
* Copyright (c) 1999-2001 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 H323 Library.
*
* The Initial Developer of the Original Code is Equivalence Pty. Ltd.
*
* Portions of this code were written with the assisance of funding from
* Vovida Networks, Inc. http://www.vovida.com.
*
* Contributor(s): ______________________________________.
*
* $Log: gsmcodec.h,v $
* Revision 2.7.2.1 2006/02/22 12:15:26 csoutheren
* Backports from CVS head
*
* Revision 2.8 2006/02/09 22:48:40 csoutheren
* Experimental fix for receiving MSGSM in GSM codec
*
* Revision 2.7 2005/11/30 13:35:26 csoutheren
* Changed tags for Doxygen
*
* Revision 2.6 2005/08/28 07:59:17 rjongbloed
* Converted OpalTranscoder to use factory, requiring sme changes in making sure
* OpalMediaFormat instances are initialised before use.
*
* Revision 2.5 2002/11/10 11:33:16 robertj
* Updated to OpenH323 v1.10.3
*
* Revision 2.4 2002/09/16 02:52:33 robertj
* Added #define so can select if #pragma interface/implementation is used on
* platform basis (eg MacOS) rather than compiler, thanks Robert Monaghan.
*
* Revision 2.3 2002/09/04 06:01:46 robertj
* Updated to OpenH323 v1.9.6
*
* Revision 2.2 2001/11/02 10:45:19 robertj
* Updated to OpenH323 v1.7.3
*
* Revision 2.1 2001/08/01 05:03:09 robertj
* Changes to allow control of linking software transcoders, use macros
* to force linking.
* Allowed codecs to be used without H.,323 being linked by using the
* new NO_H323 define.
* Major changes to H.323 capabilities, uses OpalMediaFormat for base name.
*
* Revision 2.0 2001/07/27 15:48:24 robertj
* Conversion of OpenH323 to Open Phone Abstraction Library (OPAL)
*
* Revision 1.14 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 1.13 2002/09/03 06:19:36 robertj
* Normalised the multi-include header prevention ifdef/define symbol.
*
* Revision 1.12 2002/08/05 10:03:47 robertj
* Cosmetic changes to normalise the usage of pragma interface/implementation.
*
* Revision 1.11 2001/10/24 01:20:34 robertj
* Added code to help with static linking of H323Capability names database.
*
* Revision 1.10 2001/02/11 22:48:30 robertj
* Added #pragma interface for GNU C++.
*
* Revision 1.9 2001/01/25 07:27:14 robertj
* Major changes to add more flexible OpalMediaFormat class to normalise
* all information about media types, especially codecs.
*
* Revision 1.8 2000/10/13 03:43:14 robertj
* Added clamping to avoid ever setting incorrect tx frame count.
*
* Revision 1.7 2000/05/10 04:05:26 robertj
* Changed capabilities so has a function to get name of codec, instead of relying on PrintOn.
*
* Revision 1.6 2000/05/02 04:32:24 robertj
* Fixed copyright notice comment.
*
* Revision 1.5 1999/12/31 00:05:36 robertj
* Added Microsoft ACM G.723.1 codec capability.
*
* Revision 1.4 1999/12/23 23:02:34 robertj
* File reorganision for separating RTP from H.323 and creation of LID for VPB support.
*
* Revision 1.3 1999/10/08 09:59:01 robertj
* Rewrite of capability for sending multiple audio frames
*
* Revision 1.2 1999/10/08 04:58:37 robertj
* Added capability for sending multiple audio frames in single RTP packet
*
* Revision 1.1 1999/09/08 04:05:48 robertj
* Added support for video capabilities & codec, still needs the actual codec itself!
*
*/
#ifndef __OPAL_GSMCODEC_H
#define __OPAL_GSMCODEC_H
#ifdef P_USE_PRAGMA
#pragma interface
#endif
#include <opal/transcoders.h>
///////////////////////////////////////////////////////////////////////////////
struct gsm_state;
class Opal_GSM0610 : public OpalFramedTranscoder {
public:
Opal_GSM0610(
const OpalMediaFormat & inputMediaFormat, ///< Input media format
const OpalMediaFormat & outputMediaFormat, ///< Output media format
unsigned inputBytesPerFrame, ///< Number of bytes in an input frame
unsigned outputBytesPerFrame ///< Number of bytes in an output frame
);
~Opal_GSM0610();
protected:
gsm_state * gsm;
};
///////////////////////////////////////////////////////////////////////////////
class Opal_GSM0610_PCM : public Opal_GSM0610 {
public:
Opal_GSM0610_PCM();
BOOL Convert(const RTP_DataFrame & input, RTP_DataFrame & output);
BOOL ConvertFrame(const BYTE * src, BYTE * dst);
};
///////////////////////////////////////////////////////////////////////////////
class Opal_PCM_GSM0610 : public Opal_GSM0610 {
public:
Opal_PCM_GSM0610();
virtual BOOL ConvertFrame(const BYTE * src, BYTE * dst);
};
///////////////////////////////////////////////////////////////////////////////
#define OPAL_REGISTER_GSM0610() \
OPAL_REGISTER_TRANSCODER(Opal_GSM0610_PCM, OpalGSM0610, OpalPCM16); \
OPAL_REGISTER_TRANSCODER(Opal_PCM_GSM0610, OpalPCM16, OpalGSM0610)
#endif // __OPAL_GSMCODEC_H
/////////////////////////////////////////////////////////////////////////////
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