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sdl-audiocd.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.
 *
 * $URL$
 * $Id$
 *
 */

#include "common/scummsys.h"

#if defined(SDL_BACKEND)

#include "common/textconsole.h"
#include "backends/audiocd/sdl/sdl-audiocd.h"

SdlAudioCDManager::SdlAudioCDManager()
      :
      _cdrom(0),
      _cdTrack(0),
      _cdNumLoops(0),
      _cdStartFrame(0),
      _cdDuration(0),
      _cdEndTime(0),
      _cdStopTime(0) {

}

SdlAudioCDManager::~SdlAudioCDManager() {
      if (_cdrom) {
            SDL_CDStop(_cdrom);
            SDL_CDClose(_cdrom);
      }
}

bool SdlAudioCDManager::openCD(int drive) {
      if (SDL_InitSubSystem(SDL_INIT_CDROM) == -1)
            _cdrom = NULL;
      else {
            _cdrom = SDL_CDOpen(drive);
            // Did it open? Check if _cdrom is NULL
            if (!_cdrom) {
                  warning("Couldn't open drive: %s", SDL_GetError());
            } else {
                  _cdNumLoops = 0;
                  _cdStopTime = 0;
                  _cdEndTime = 0;
            }
      }

      return (_cdrom != NULL);
}

void SdlAudioCDManager::stopCD() {
      // Stop CD Audio in 1/10th of a second
      _cdStopTime = SDL_GetTicks() + 100;
      _cdNumLoops = 0;
}

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

      if (!_cdrom)
            return;

      if (duration > 0)
            duration += 5;

      _cdTrack = track;
      _cdNumLoops = num_loops;
      _cdStartFrame = start_frame;

      SDL_CDStatus(_cdrom);
      if (start_frame == 0 && duration == 0)
            SDL_CDPlayTracks(_cdrom, track, 0, 1, 0);
      else
            SDL_CDPlayTracks(_cdrom, track, start_frame, 0, duration);
      _cdDuration = duration;
      _cdStopTime = 0;
      _cdEndTime = SDL_GetTicks() + _cdrom->track[track].length * 1000 / CD_FPS;
}

bool SdlAudioCDManager::pollCD() const {
      if (!_cdrom)
            return false;

      return (_cdNumLoops != 0 && (SDL_GetTicks() < _cdEndTime || SDL_CDStatus(_cdrom) == CD_PLAYING));
}

void SdlAudioCDManager::updateCD() {
      if (!_cdrom)
            return;

      if (_cdStopTime != 0 && SDL_GetTicks() >= _cdStopTime) {
            SDL_CDStop(_cdrom);
            _cdNumLoops = 0;
            _cdStopTime = 0;
            return;
      }

      if (_cdNumLoops == 0 || SDL_GetTicks() < _cdEndTime)
            return;

      if (_cdNumLoops != 1 && SDL_CDStatus(_cdrom) != CD_STOPPED) {
            // Wait another second for it to be done
            _cdEndTime += 1000;
            return;
      }

      if (_cdNumLoops > 0)
            _cdNumLoops--;

      if (_cdNumLoops != 0) {
            if (_cdStartFrame == 0 && _cdDuration == 0)
                  SDL_CDPlayTracks(_cdrom, _cdTrack, 0, 1, 0);
            else
                  SDL_CDPlayTracks(_cdrom, _cdTrack, _cdStartFrame, 0, _cdDuration);
            _cdEndTime = SDL_GetTicks() + _cdrom->track[_cdTrack].length * 1000 / CD_FPS;
      }
}

#endif

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