diff options
Diffstat (limited to 'engines/gob/sound/cdrom.cpp')
| -rw-r--r-- | engines/gob/sound/cdrom.cpp | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/engines/gob/sound/cdrom.cpp b/engines/gob/sound/cdrom.cpp new file mode 100644 index 0000000000..f3bc70807e --- /dev/null +++ b/engines/gob/sound/cdrom.cpp @@ -0,0 +1,201 @@ +/* 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; + + debugC(1, kDebugMusic, "CDROM::startTrack(%s)", trackName); + + 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 + debugC(1, kDebugMusic, "CDROM::play(%d, %d)", from, to); + + 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() { + debugC(1, kDebugMusic, "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 |