forked_player.cc

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/*
 *  Copyright (C) 2001  The Exult Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif


#ifdef XWIN


#ifndef ALPHA_LINUX_CXX
#  include <csignal>
#endif
#include <unistd.h>

#include "Configuration.h"
#include "exult.h"
#include "fnames.h"
#include "forked_player.h"
#include <iostream>

using std::cerr;
using std::endl;

// NB: This function doesn't return unless execlp fails!
static  void    playFJmidifile(const char *name)
{
  execlp("playmidi","-v","-v","-e",name,0);
}

forked_player::forked_player() : forked_job(-1)
{}

void  forked_player::stop_track(void)
{
  if(forked_job!=-1)
    kill(forked_job,SIGKILL);
  forked_job=-1;
}

forked_player::~forked_player(void)
{
  stop_track();
}

bool  forked_player::is_playing(void)
{
  if(forked_job==-1)
    return false;
  if(kill(forked_job,0))
    {
    forked_job=-1;
    return false;
    }
  return true;
}


void  forked_player::start_track(XMIDIEventList *event_list,bool repeat)
{
  static char *name = 0;

  if (name == 0) {
    name = new char[19];
    strcpy(name, "/tmp/u7midi_XXXXXX");
    close(mkstemp(name));
    // TODO: delete this file on exit
  }

  event_list->Write(name);

  repeat_=repeat;
#if DEBUG
  cerr << "Starting midi sequence with forked_player" << endl;
#endif
  if(forked_job!=-1)
  {
#if DEBUG
    cerr << "Stopping any running track" << endl;
#endif
    stop_track();
  }

  forked_job=fork();
  if(!forked_job)
  {
    playFJmidifile(name); // this doesn't return if it started correctly
    cerr << "Starting forked player failed" << endl;
    exit(-1);
  }
}

const char *forked_player::copyright(void)
{
  return "Internal cheapass forked midi player";
}

#endif // XWIN

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