ixjwin32.cxx

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/*
 * ixjwin32.cxx
 *
 * QuickNet Internet Phone/Line JACK codec interface
 *
 * Open H323 Library
 *
 * Copyright (c) 1999-2000 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 
 * Quicknet Technologies, Inc. http://www.quicknet.net.
 * 
 * Contributor(s): ______________________________________.
 *
 * $Log: ixjwin32.cxx,v $
 * Revision 1.47  2000/07/25 02:07:34  robertj
 * Reduced max range of device numbers as can get some low serial numbers.
 *
 * Revision 1.46  2000/07/14 14:12:06  robertj
 * Added turning off of VAD which results in 1 byte G.723.1 frames that not
 *    everyone supports yet.
 *
 * Revision 1.45  2000/07/12 10:25:07  robertj
 * Added PhoneCARD support on Win9x systems.
 *
 * Revision 1.44  2000/06/20 12:51:23  robertj
 * Changed IXJ driver open so does not change selected line to PSTN.
 *
 * Revision 1.43  2000/06/20 02:22:41  robertj
 * Fixed NT version so can still use serial number to open device.
 *
 * Revision 1.42  2000/06/19 00:31:30  robertj
 * Changed NT device name to be a bit more user friendly.
 *
 * Revision 1.41  2000/06/08 02:33:25  robertj
 * Fixed detection of correct xJack card type under NT.
 * Added ability to use just "0" or "1" instead of "\\.\QTJackDevice0" as device name.
 *
 * Revision 1.40  2000/05/25 02:23:25  robertj
 * Added calls to get volume settings
 *
 * Revision 1.39  2000/05/15 08:38:59  robertj
 * Changed LineJACK PSTN check so is initiated only if state unknown.
 *
 * Revision 1.38  2000/05/02 04:32:27  robertj
 * Fixed copyright notice comment.
 *
 * Revision 1.37  2000/04/30 04:00:33  robertj
 * Changed determination of frame size to use driver ioctl for PCM, uLAw and ALaw.
 *
 * Revision 1.36  2000/04/28 07:00:26  robertj
 * Fixed race condition causing RTP send thread to randomly shut down.
 *
 * Revision 1.35  2000/04/19 01:57:39  robertj
 * Added mixer code to get volume control support on LineJACK;s.
 * Attempt to prevent getting very occassional ReadFrame() failure causing tx channel stop.
 *
 * Revision 1.34  2000/04/12 23:56:37  robertj
 * Fixed detection of PCI PhoneJACK on NT.
 *
 * Revision 1.33  2000/04/06 20:36:25  robertj
 * Fixed some LineJACK compatbility problems (eg DTMF detect stopping).
 *
 * Revision 1.32  2000/04/05 20:55:41  robertj
 * Added caller ID send, and fixed receive for multiple fields.
 *
 * Revision 1.31  2000/04/05 18:04:12  robertj
 * Changed caller ID code for better portability.
 *
 * Revision 1.30  2000/03/30 01:55:13  robertj
 * Added function so silence detection can work on xJack internetl codecs.
 * Fixed length of G.728 codec frames
 *
 * Revision 1.29  2000/03/29 20:59:52  robertj
 * Added function on LID to get available codecs.
 * Improved consistency in "device name".
 * Fixed codec table for G.729 codec
 * Fixed lockup bug with tone/codec interaction.
 *
 * Revision 1.28  2000/03/23 02:48:49  robertj
 * Added calling tone detection code.
 *
 * Revision 1.27  2000/03/17 20:59:42  robertj
 * Fixed line count to be xJACK card dependent.
 * Added support for more xJACK card types.
 *
 * Revision 1.26  2000/02/24 00:35:22  robertj
 * Fixed problem with unresolved SetRemoveDTMF function when not using linux telephony.
 *
 * Revision 1.25  2000/02/16 04:04:37  robertj
 * Fixed bug where IXJ POTS handset never returned off hook.
 *
 * Revision 1.24  2000/01/07 08:28:09  robertj
 * Additions and changes to line interface device base class.
 *
 * Revision 1.23  1999/12/30 09:16:41  robertj
 * Fixed initialisation of driver handle, prevent crash in Close().
 *
 * Revision 1.22  1999/12/23 23:02:36  robertj
 * File reorganision for separating RTP from H.323 and creation of LID for VPB support.
 *
 * Revision 1.21  1999/11/29 04:50:11  robertj
 * Added adaptive threshold calculation to silence detection.
 *
 * Revision 1.20  1999/11/20 04:38:03  robertj
 * Removed potential driver lockups by doing overlapped I/O only on read/write ioctls.
 *
 * Revision 1.19  1999/11/19 09:17:15  robertj
 * Fixed problems with aycnhronous shut down of logical channels.
 *
 * Revision 1.18  1999/11/16 12:43:02  robertj
 * Dixed missing initialise of AEC variable.
 *
 * Revision 1.17  1999/11/16 11:32:06  robertj
 * Added some calling tones.
 *
 * Revision 1.16  1999/11/12 02:25:01  robertj
 * More NT support.
 *
 * Revision 1.15  1999/11/11 23:15:31  robertj
 * Fixed bug where closed driver was not flagged as closed.
 *
 * Revision 1.14  1999/11/11 01:16:57  robertj
 * Added NT support, debounce of phone hook state and wait for line test completion.
 *
 * Revision 1.13  1999/11/06 05:36:19  robertj
 * Fixed problem with read/write locking up when stopping codec.
 *
 * Revision 1.12  1999/11/06 03:32:27  robertj
 * Added volume control functions for record/playback.
 *
 * Revision 1.11  1999/11/05 12:53:40  robertj
 * Fixed warnings on notrace version.
 *
 * Revision 1.10  1999/11/05 10:51:18  robertj
 * Fixed problem with new ixj channel doing incorrect double initialise
 *
 * Revision 1.9  1999/11/05 08:54:41  robertj
 * Rewrite of ixj interface code to fix support for arbitrary codecs.
 *
 * Revision 1.8  1999/11/02 00:24:29  robertj
 * Added GetCallerID() function and implemented some LineJACK code.
 *
 * Revision 1.7  1999/11/01 01:20:26  robertj
 * Added flunction to enabled/disable DTM detection
 *
 * Revision 1.6  1999/11/01 00:47:14  robertj
 * Fixed problems with stopping codecs
 *
 * Revision 1.5  1999/10/30 12:43:25  robertj
 * Fixed "lock up" problem, DTMF problem and added function to get line status.
 *
 * Revision 1.4  1999/10/28 12:21:34  robertj
 * Added AEC support and speakerphone switching button.
 *
 * Revision 1.3  1999/10/27 06:30:31  robertj
 * Added CancelIO command when closing channel.
 *
 * Revision 1.2  1999/10/24 14:51:41  robertj
 * Removed EnableDetectDTMF() as unix ioctl does not exist.
 *
 * Revision 1.1  1999/10/24 12:59:41  robertj
 * Added platform independent support for Quicknet xJACK cards.
 *
 */

#include <ptlib.h>
#include "ixjlid.h"

#include <QTIoctl.h>
#include <ixjDefs.h>


#define new PNEW


static BOOL IsWindows95()
{
  static OSVERSIONINFO version;
  if (version.dwOSVersionInfoSize == 0) {
    version.dwOSVersionInfoSize = sizeof(version);
    GetVersionEx(&version);
  }
  return version.dwPlatformId != VER_PLATFORM_WIN32_NT;
}

#define IsLineJACK() (dwCardType == 3)


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

OpalIxJDevice::OpalIxJDevice()
{
  hDriver = INVALID_HANDLE_VALUE;
  readStopped = writeStopped = TRUE;
  readFrameSize = writeFrameSize = 480;  // 30 milliseconds of 16 bit PCM data
  aecLevel = AECOff;
  lastDTMFDigit = 0;
}


BOOL OpalIxJDevice::Open(const PString & device)
{
  Close();

  PTRACE(3, "xJack\tOpening IxJ device \"" << device << '"');

  static const char DevicePathPrefix[] = "\\\\.\\QTJackDevice";

  DWORD dwDeviceId = device.AsUnsigned(16);

  PString devicePath;
  if (IsWindows95())
    devicePath = "\\\\.\\Qtipj.vxd";
  else {
    if (dwDeviceId < 100) {
      devicePath = device.Left(device.Find(' '));
      if (strspn(devicePath, "0123456789") == strlen(devicePath))
        devicePath = DevicePathPrefix + devicePath;
    }
    else {
      PStringArray allDevices = GetDeviceNames();
      for (PINDEX dev = 0; dev < allDevices.GetSize(); dev++) {
        PString thisDevice = allDevices[dev];
        if (thisDevice.Find(device) != P_MAX_INDEX) {
          devicePath = thisDevice.Left(thisDevice.Find(' '));
          break;
        }
      }
    }
  }

  hDriver = CreateFile(devicePath,
                       GENERIC_READ | GENERIC_WRITE,
                       FILE_SHARE_WRITE,
                       NULL,
                       OPEN_EXISTING,
                       FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED,
                       NULL);
  if (hDriver == INVALID_HANDLE_VALUE) {
    osError = ::GetLastError();
    return FALSE;
  }

  if (IsWindows95()) {
    DWORD dwResult = 0;
    if (!IoControl(IOCTL_Device_Open, dwDeviceId, &dwResult) || dwResult == 0) {
      CloseHandle(hDriver);
      hDriver = INVALID_HANDLE_VALUE;
      osError = ENOENT;
      return FALSE;
    }
    dwCardType = dwDeviceId >> 28;
    deviceName = psprintf("%08X", dwDeviceId);
  }
  else {
    PString prefix = devicePath.Mid(sizeof(DevicePathPrefix)-1);
    if (prefix == DevicePathPrefix)
      deviceName = prefix;
    else
      deviceName = devicePath;

    DWORD devId = 0, bytesReturned;
    if (DeviceIoControl(hDriver, IOCTL_Device_GetSerialNumber,
                        NULL, 0, &devId, sizeof(devId), &bytesReturned, NULL) &&
        bytesReturned == sizeof(devId) && devId != 0)
      dwCardType = devId >> 28;
    else {
      PINDEX pos = device.Find('(');
      if (pos != P_MAX_INDEX)
        dwCardType = device[pos+1]-'0';
      else {
        PStringArray names = GetDeviceNames();
        dwCardType = 0;
        for (PINDEX i = 0; i < names.GetSize(); i++) {
          if (names[i].Left(devicePath.GetLength()) == devicePath) {
            pos = names[i].Find('(');
            if (pos != P_MAX_INDEX)
              dwCardType = names[i][pos+1]-'0';
            break;
          }
        }
      }
    }
  }

  IoControl(IOCTL_Idle_Idle);
  IoControl(IOCTL_Codec_SetKHz, 8000);
  IoControl(IOCTL_Idle_SetMasterGain, 15);
  IoControl(IOCTL_Filter_EnableDTMFDetect);

  PTRACE(2, "xJack\tOpened IxJ device " << GetName());
  os_handle = 1;

  return TRUE;
}


BOOL OpalIxJDevice::Close()
{
  if (!IsOpen())
    return FALSE;

  RingLine(0, 0);
  SetLineToLineDirect(0, 1, FALSE);
  IoControl(IOCTL_Record_Stop);
  IoControl(IOCTL_Playback_Stop);

  if (IsWindows95())
    IoControl(IOCTL_Device_Close);

  deviceName = PString();

  BOOL ok = CloseHandle(hDriver);
  hDriver = INVALID_HANDLE_VALUE;
  os_handle = -1;
  return ok;
}


PString OpalIxJDevice::GetName() const
{
  switch (dwCardType) {
    case 0 :
    case 1 :
      return "PhoneJACK (" + deviceName + ')';

    case 3 :
      return "LineJACK (" + deviceName + ')';

    case 4 :
      return "PhoneJACK-Lite (" + deviceName + ')';
  }

  return "xJACK (" + deviceName + ')';
}


unsigned OpalIxJDevice::GetLineCount()
{
  return IsLineJACK() ? NumLines : 1;
}


BOOL OpalIxJDevice::IsLinePresent(unsigned line)
{
  if (line >= GetLineCount())
    return FALSE;

  if (line != PSTNLine)
    return FALSE;

  DWORD dwResult = 0;
  do {
    if (!IoControl(IOCTL_DevCtrl_GetLineTestResult, 0, &dwResult))
      return FALSE;
    if (dwResult == 0xffffffff) {
      IoControl(IOCTL_DevCtrl_LineTest);
      dwResult = LINE_TEST_TESTING;
    }
  } while (dwResult == LINE_TEST_TESTING);

  return dwResult == LINE_TEST_OK;
}


BOOL OpalIxJDevice::IsLineOffHook(unsigned line)
{
  if (line >= GetLineCount())
    return FALSE;

  DWORD dwResult = 0;

  if (line == PSTNLine) {
    DWORD dwResult = 0;
    if (!IoControl(IOCTL_DevCtrl_GetLineOnHook, 0, &dwResult))
      return FALSE;
    return dwResult == 0;
  }

  BOOL state = FALSE;

  for (PINDEX retry = 0; retry < 10; retry++) {
    dwResult = 0;
    if (!IoControl(IsLineJACK() ? IOCTL_DevCtrl_GetLinePhoneOnHook
			        : IOCTL_DevCtrl_GetOnHook, 0, &dwResult))
      return FALSE;

    if (dwResult != 0 && state) {
      state = FALSE;
      retry = 0;
    }
    else if (dwResult == 0 && !state) {
      state = TRUE;
      retry = 0;
    }

    Sleep(10);
  }

  return state;
}


BOOL OpalIxJDevice::SetLineOffHook(unsigned line, BOOL newState)
{
  if (line >= GetLineCount())
    return FALSE;

  if (line != PSTNLine)
    return FALSE;

  return IoControl(IOCTL_DevCtrl_LineSetOnHook, !newState);
}


BOOL OpalIxJDevice::IsLineRinging(unsigned line, DWORD * /*cadence*/)
{
  if (line >= GetLineCount())
    return FALSE;

  if (line != PSTNLine)
    return FALSE;

  if (ringTimeout.IsRunning())
    return TRUE;

  DWORD dwResult = 0;
  if (!IoControl(IOCTL_DevCtrl_LineGetRinging, 0, &dwResult) || dwResult == 0)