/*
 * filemembers.cxx
 *
 * Various file-based Members for OpenMCU
 *
 * Copyright (C) 2003 Post Increment
 *
 * 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 Portable Windows Library.
 *
 * The Initial Developer of the Original Code is Post Increment
 *
 * Portions of this code were written by Post Increment (http://www.postincrement.com) 
 * with the assistance of funding from Citron Networks (http://www.citron.com.tw)
 *
 * Portions are Copyright (C) 1993 Free Software Foundation, Inc.
 * All Rights Reserved.
 *
 * Contributor(s): Derek J Smithies (derek@indranet.co.nz)
 *
 * $Log: filemembers.cxx,v $
 * Revision 2.2  2006/01/16 09:43:05  csoutheren
 * Fixed problem with crashes at end of playing files
 *
 * Revision 2.1  2004/05/26 06:54:31  csoutheren
 * Changed to be a PHTTPServiceProcess
 * Added ability to play WAV files on member entry and exit
 * Added additional documentation on all classes
 * Preparation for re-introducing video
 *
 */

#include <ptlib.h>
#include "conference.h"
#include "filemembers.h"

ConferenceSoundCardMember::ConferenceSoundCardMember()
#ifdef _WIN32
#pragma warning(push)
#pragma warning(disable:4355)
#endif
  : ConferenceMember(this)
#ifdef _WIN32
#pragma warning(pop)
#endif
{
  // open the default audio device
  PString deviceName = PSoundChannel::GetDefaultDevice(PSoundChannel::Player);
  soundDevice.Open(deviceName, PSoundChannel::Player, 1, 8000, 16);

  // start a thread to read from the conference and write to default audio device
  if (!soundDevice.IsOpen()) {
    thread = NULL;
  } else {
    running = TRUE;
    thread = PThread::Create(PCREATE_NOTIFIER(Thread), 0, PThread::AutoDeleteThread);
  }
}

ConferenceSoundCardMember::~ConferenceSoundCardMember()
{
  Unlisten();
}

void ConferenceSoundCardMember::Unlisten()
{
  if (conference->RemoveMember(this))
    conference->GetManager().RemoveConference(conference->GetID());

  if ((thread != NULL) && running) {
    running = FALSE;
    thread->WaitForTermination();
    thread = NULL;
  }
}

void ConferenceSoundCardMember::Thread(PThread &, INT)
{
  AudioDelay audioDelay;
  PBYTEArray pcmData(480);
  soundDevice.SetBuffers(480, 3);

  while (running) {

    // read a block of data
    ReadAudio(pcmData.GetPointer(), pcmData.GetSize());

    // write the data to the sound card
    if (soundDevice.IsOpen())
      soundDevice.Write(pcmData.GetPointer(), pcmData.GetSize());

    audioDelay.Delay(pcmData.GetSize() / 16);
  }

  ConferenceManager & mgr = conference->GetManager();
  mgr.RemoveMember(conference->GetID(), this);
}


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

ConferenceFileMember::ConferenceFileMember(const PFilePath & _fn, PFile::OpenMode _mode)
#ifdef _WIN32
#pragma warning(push)
#pragma warning(disable:4355)
#endif
  : ConferenceMember((void *)this), filename(_fn), mode(_mode)
#ifdef _WIN32
#pragma warning(pop)
#endif
{
  // open the default audio device
  if (!file.Open(filename, mode)) {
    PTRACE(1, "Cannot open WAV file " << filename);
    return;
  }

  PTRACE(1, "Playing WAV file " << filename);

  running = TRUE;

  if (mode == PFile::WriteOnly)
    thread = PThread::Create(PCREATE_NOTIFIER(WriteThread), 0, PThread::AutoDeleteThread);
  else
    thread = PThread::Create(PCREATE_NOTIFIER(ReadThread), 0, PThread::AutoDeleteThread);
}

ConferenceFileMember::~ConferenceFileMember()
{
  Unlisten();
}

void ConferenceFileMember::Unlisten()
{
  if (conference->RemoveMember(this))
    conference->GetManager().RemoveConference(conference->GetID());

  if ((thread != NULL) && running) {
    running = FALSE;
    thread->WaitForTermination();
    thread = NULL;
  }
}

void ConferenceFileMember::WriteThread(PThread &, INT)
{
  PBYTEArray pcmData(480);
  AudioDelay audioDelay;

  while (running) {

    // read a block of data
    ReadAudio(pcmData.GetPointer(), pcmData.GetSize());

    // write to the file
    if (file.IsOpen())
      file.Write(pcmData.GetPointer(), pcmData.GetSize());

    // and delay
    audioDelay.Delay(pcmData.GetSize() / 16);
  }

  ConferenceManager & mgr = conference->GetManager();
  mgr.RemoveMember(conference->GetID(), this);
}

void ConferenceFileMember::ReadThread(PThread &, INT)
{
  PBYTEArray pcmData(480);
  AudioDelay audioDelay;

  while (running) {

    if (!file.IsOpen())
      break;

    // read a block of data from the file
    if (!file.Read(pcmData.GetPointer(), pcmData.GetSize()))
      break;

    // read a block of data
    WriteAudio(pcmData.GetPointer(), pcmData.GetSize());

    // and delay
    audioDelay.Delay(pcmData.GetSize() / 16);
  }

  ConferenceManager & mgr = conference->GetManager();
  mgr.RemoveMember(conference->GetID(), this);
}