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/* 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/endian.h"
#include "common/util.h"
#include "sound/audiocd.h"
#include "gob/gob.h"
#include "gob/sound/cdrom.h"
namespace Gob {
CDROM::CDROM() {
_cdPlaying = false;
_LICbuffer = 0;
for (int i = 0; i < 16; i++)
_curTrack[i] = 0;
_numTracks = 0;
_trackStop = 0;
_startTime = 0;
}
CDROM::~CDROM() {
}
void CDROM::readLIC(DataStream &stream) {
uint16 version, startChunk, pos;
freeLICBuffer();
*_curTrack = 0;
version = stream.readUint16LE();
startChunk = stream.readUint16LE();
_numTracks = stream.readUint16LE();
if (version != 3)
error("Unknown version %d while reading LIC", version);
stream.seek(50);
for (int i = 0; i < startChunk; i++) {
pos = stream.readUint16LE();
if (!pos)
break;
stream.skip(pos);
}
_LICbuffer = new byte[_numTracks * 22];
stream.read(_LICbuffer, _numTracks * 22);
}
void CDROM::freeLICBuffer() {
delete[] _LICbuffer;
_LICbuffer = 0;
}
void CDROM::startTrack(const char *trackName) {
if (!_LICbuffer)
return;
byte *matchPtr = getTrackBuffer(trackName);
if (!matchPtr) {
warning("Track \"%s\" not found", trackName);
return;
}
strncpy0(_curTrack, trackName, 15);
stopPlaying();
_curTrackBuffer = matchPtr;
while (getTrackPos() >= 0)
;
uint32 start = READ_LE_UINT32(matchPtr + 12);
uint32 end = READ_LE_UINT32(matchPtr + 16);
play(start, end);
_startTime = g_system->getMillis();
_trackStop = _startTime + (end - start + 1 + 150) * 40 / 3;
}
void CDROM::play(uint32 from, uint32 to) {
// play from sector [from] to sector [to]
//
// format is HSG:
// HSG encodes frame information into a double word:
// minute multiplied by 4500, plus second multiplied by 75,
// plus frame, minus 150
AudioCD.play(1, 1, from, to - from + 1);
_cdPlaying = true;
}
bool CDROM::isPlaying() const {
return _cdPlaying;
}
int32 CDROM::getTrackPos(const char *keyTrack) const {
byte *keyBuffer = getTrackBuffer(keyTrack);
uint32 curPos = (g_system->getMillis() - _startTime) * 3 / 40;
if (_cdPlaying && (g_system->getMillis() < _trackStop)) {
if (keyBuffer && _curTrackBuffer && (keyBuffer != _curTrackBuffer)) {
uint32 kStart = READ_LE_UINT32(keyBuffer + 12);
uint32 kEnd = READ_LE_UINT32(keyBuffer + 16);
uint32 cStart = READ_LE_UINT32(_curTrackBuffer + 12);
uint32 cEnd = READ_LE_UINT32(_curTrackBuffer + 16);
if ((kStart >= cStart) && (kEnd <= cEnd)) {
if ((kStart - cStart) > curPos)
return -2;
if ((kEnd - cStart) < curPos)
return -1;
}
}
return curPos;
} else
return -1;
}
const char *CDROM::getCurTrack() const {
return _curTrack;
}
void CDROM::stopPlaying() {
stop();
while (getTrackPos() != -1)
;
}
void CDROM::stop() {
_curTrackBuffer = 0;
AudioCD.stop();
_cdPlaying = false;
}
void CDROM::testCD(int trySubst, const char *label) {
if (!trySubst) {
error("CDROM track substitution is not supported");
return;
}
_LICbuffer = 0;
_cdPlaying = false;
// Original checked CD label here
// but will skip it as it will require OSystem extensions of direct
// CD secor reading
}
byte *CDROM::getTrackBuffer(const char *trackName) const {
if (!_LICbuffer || !trackName)
return 0;
byte *matchPtr = 0;
byte *curPtr = _LICbuffer;
for (int i = 0; i < _numTracks; i++) {
if (!scumm_stricmp((char *) curPtr, trackName)) {
matchPtr = curPtr;
break;
}
curPtr += 22;
}
return matchPtr;
}
} // End of namespace Gob
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