/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            decoder.cc
 *
 *  Mon Mar  6 20:14:30 CET 2006
 *  Copyright  2006 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of MIaV.
 *
 *  MIaV 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.
 *
 *  MIaV 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 MIaV; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#include "decoder.h"

#include "info.h"

#define READ_DV_FROM_FILE

#include "dv.h"
#ifdef READ_DV_FROM_FILE
#include "dvfile.h"
#else/* READ_DV_FROM_FILE*/
#include "dv1394.h"
#endif/* READ_DV_FROM_FILE*/

#include <QEvent>
#include <QApplication>

Decoder::Decoder(): semaphore(1)
{
  frame = NULL;
  running = true;
  qApp->installEventFilter(this);
}

Decoder::~Decoder()
{}

void Decoder::run()
{
  semaphore.acquire(); // Lock the shutdown process

#ifdef READ_DV_FROM_FILE
  dvfile reader;
#else/* READ_DV_FROM_FILE*/
  dv1394 reader;
  reader.connect();
#endif/* READ_DV_FROM_FILE*/
 
  while(running) {
    char *tmp = (char*)reader.readFrame();
    mutex.lock();
    if(frame) free(frame);
    frame = tmp;
    mutex.unlock();
  }
  semaphore.release(); // Unlock the shutdown process
}

char *Decoder::getFrame()
{
  char *tmp;

  mutex.lock();
  tmp = frame;
  frame = NULL;
  mutex.unlock();

  return tmp;
}

bool Decoder::eventFilter(QObject *o, QEvent *e)
{
  if (e->type() == QEvent::Close) {
    running = false; // Tell the thread to stop.
    semaphore.acquire(); // Wait for the thread to stop.
  }

  // standard event processing
  return false;
}