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cd_default.cpp

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-11-1/backends/platform/PalmOS/Src/cd_default.cpp $
 * $Id: cd_default.cpp 30944 2008-02-23 22:50:18Z sev $
 *
 */
#include "common/system.h"
#include "cd_default.h"

DefaultCDPlayer::DefaultCDPlayer(OSystem *sys) {
      _sys = sys;
}

bool DefaultCDPlayer::init() {
      _isInitialized = true;
      return _isInitialized;
}

void DefaultCDPlayer::release() {
      // self delete
      delete this;
}

bool DefaultCDPlayer::poll() {
      return (_defLoops != 0 && _sys->getMillis() < _defTrackEndFrame);
}

void DefaultCDPlayer::update() {

      // stop replay upon request of stopCD()
      if (_defStopTime != 0 && _sys->getMillis() >= _defStopTime) {
            _defLoops = 0;
            _defStopTime = 0;
            _defTrackEndFrame = 0;
            return;
      }

      // not fully played
      if (_sys->getMillis() < _defTrackEndFrame)
            return;

      if (_defLoops == 0)
            return;

      // loop again ?
      if (_defLoops > 0)
            _defLoops--;

      // loop if needed
      if (_defLoops != 0) {
            _defTrackEndFrame = _sys->getMillis() + _defTrackLength;
      }
}

void DefaultCDPlayer::stop() {      /* Stop CD Audio in 1/10th of a second */
      _defStopTime = _sys->getMillis() + 100;
      _defLoops = 0;
      return;
}

void DefaultCDPlayer::play(int track, int num_loops, int start_frame, int duration) {
      if (!num_loops && !start_frame)
            return;

      UInt32 fullLength;

      _defLoops = num_loops;
      start_frame = TO_MSECS(start_frame);
      duration = TO_MSECS(duration);

      // frame in milli-seconds
      _defStopTime = 0;
      fullLength  = start_frame + gVars->CD.defaultTrackLength * 1000;

      if (duration > 0) {
            _defTrackLength = duration;
      } else if (start_frame > 0) {
            _defTrackLength = fullLength;
            _defTrackLength -= start_frame;
      } else {
            _defTrackLength = fullLength;
      }

      // try to play the track
      _defTrackEndFrame = _sys->getMillis() + _defTrackLength;
}

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