g729codec.cxx

sloedgy open sip stack source code

/*
 * g729codec.cxx
 *
 * H.323 interface for G.729A codec
 *
 * Open H323 Library
 *
 * 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 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: g729codec.cxx,v $
 * Revision 1.1  2006/06/26 03:02:34  joegenbaclor
 * I have decided to include the latest development realease  of OPAL tagged Deimos Devel 1 (June 8 2006) as inegrated classes to opensipstack to avoid future version conflicts due to the fast pace in OPAL development.   This move is also aimed to reduce the size of projects using OPAL componets such as the soon to be relased OpenSIPPhone.
 *
 * 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  2004/02/19 10:47:02  rjongbloed
 * Merged OpenH323 version 1.13.1 changes.
 *
 * Revision 2.4  2003/06/02 04:04:54  rjongbloed
 * Changed to use new autoconf system
 *
 * Revision 2.3  2003/01/07 04:39:53  robertj
 * Updated to OpenH323 v1.11.2
 *
 * Revision 2.2  2002/09/04 06:01:47  robertj
 * Updated to OpenH323 v1.9.6
 *
 * Revision 2.1  2002/07/01 04:56:31  robertj
 * Updated to OpenH323 v1.9.1
 *
 * Revision 1.7  2003/05/05 11:59:25  robertj
 * Changed to use autoconf style selection of options and subsystems.
 *
 * Revision 1.6  2002/11/12 00:07:12  robertj
 * Added check for Voice Age G.729 only being able to do a single instance
 *   of the encoder and decoder. Now fails the second isntance isntead of
 *   interfering with the first one.
 *
 * Revision 1.5  2002/08/05 10:03:47  robertj
 * Cosmetic changes to normalise the usage of pragma interface/implementation.
 *
 * Revision 1.4  2002/06/27 03:13:11  robertj
 * Added G.729 capabilitity support even though is really G.729A.
 * Changed compilation under Windows to use environment variables for
 *   determining if Voice Age G.729A library installed.
 *
 * Revision 1.3  2001/09/21 04:37:30  robertj
 * Added missing GetSubType() function.
 *
 * Revision 1.2  2001/09/21 03:57:18  robertj
 * Fixed warning when no voice age library present.
 * Added pragma interface
 *
 * Revision 1.1  2001/09/21 02:54:47  robertj
 * Added new codec framework with no actual implementation.
 *
 */

#include <ptlib.h>

#ifdef __GNUC__
#pragma implementation "g729codec.h"
#endif

#include <codec/g729codec.h>


#if VOICE_AGE_G729A

extern "C" {
#include "va_g729a.h"
};


#if defined(_MSC_VER)

#pragma comment(lib, VOICE_AGE_G729_LIBRARY)

// All of PWLib/OpenH323 use MSVCRT.LIB or MSVCRTD.LIB, but vag729a.lib uses
// libcmt.lib, so we need to tell the linker to ignore it, can't have two
// Run Time libraries!
#pragma comment(linker, "/NODEFAULTLIB:libcmt.lib")

#endif


#if defined(_MSC_VER)

#pragma comment(lib, VOICE_AGE_G729_LIBRARY)

// All of PWLib/OpenH323 use MSVCRT.LIB or MSVCRTD.LIB, but vag729a.lib uses
// libcmt.lib, so we need to tell the linker to ignore it, can't have two
// Run Time libraries!
#pragma comment(linker, "/NODEFAULTLIB:libcmt.lib")

#endif


#define new PNEW


static OpalFramedTranscoder * voiceAgeEncoderInUse = NULL;
static OpalFramedTranscoder * voiceAgeDecoderInUse = NULL;

enum {
  FrameSize = 10,
  FrameSamples = 80
};


/////////////////////////////////////////////////////////////////////////////

Opal_G729_PCM::Opal_G729_PCM()
  : OpalFramedTranscoder(OpalG729, OpalPCM16, FrameSize, FrameSamples*2)
{
  if (voiceAgeDecoderInUse != NULL) {
    PTRACE(1, "Codec\tVoice Age G.729A decoder already in use!");
    return;
  }
  voiceAgeDecoderInUse = this;
  va_g729a_init_decoder();

  PTRACE(1, "Codec\tG.729A decoder created");
}


Opal_G729_PCM::~Opal_G729_PCM()
{
  if (voiceAgeDecoderInUse == this) {
    voiceAgeDecoderInUse = NULL;
    PTRACE(1, "Codec\tG.729A decoder destroyed");
  }
}


BOOL Opal_G729_PCM::ConvertFrame(const BYTE * src, BYTE * dst)
{
  if (voiceAgeDecoderInUse != this)
    return FALSE;

  va_g729a_decoder((unsigned char *)src, (short *)dst, 0);
  return TRUE;
}


Opal_PCM_G729::Opal_PCM_G729()
  : OpalFramedTranscoder(OpalPCM16, OpalG729, FrameSamples*2, FrameSize)
{
  if (voiceAgeEncoderInUse != NULL) {
    PTRACE(1, "Codec\tVoice Age G.729A encoder already in use!");
    return;
  }
  voiceAgeEncoderInUse = this;
  va_g729a_init_encoder();

  PTRACE(1, "Codec\tG.729A encoder created");
}


Opal_PCM_G729::~Opal_PCM_G729()
{
  if (voiceAgeEncoderInUse == this) {
    voiceAgeEncoderInUse = NULL;
    PTRACE(1, "Codec\tG.729A encoder destroyed");
  }
}


BOOL Opal_PCM_G729::ConvertFrame(const BYTE * src, BYTE * dst)
{
  if (voiceAgeEncoderInUse != this)
    return FALSE;

  va_g729a_encoder((short *)src, dst);
  return TRUE;
}


#endif // VOICE_AGE_G729A


/////////////////////////////////////////////////////////////////////////////