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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 "sci/sci.h"
#include "common/file.h"
#include "sound/fmopl.h"
#include "sound/softsynth/emumidi.h"
#include "sci/resource.h"
#include "sci/sound/drivers/mididriver.h"
namespace Sci {
#ifdef __DC__
#define STEREO false
#else
#define STEREO true
#endif
// FIXME: We don't seem to be sending the polyphony init data, so disable this for now
#define ADLIB_DISABLE_VOICE_MAPPING
class MidiDriver_AdLib : public MidiDriver_Emulated {
public:
enum {
kVoices = 9,
kRhythmKeys = 62
};
MidiDriver_AdLib(Audio::Mixer *mixer) : MidiDriver_Emulated(mixer), _playSwitch(true), _masterVolume(15), _rhythmKeyMap(0), _opl(0) { }
virtual ~MidiDriver_AdLib() { }
// MidiDriver
int open(bool isSCI0);
void close();
void send(uint32 b);
MidiChannel *allocateChannel() { return NULL; }
MidiChannel *getPercussionChannel() { return NULL; }
// AudioStream
bool isStereo() const { return _stereo; }
int getRate() const { return _mixer->getOutputRate(); }
// MidiDriver_Emulated
void generateSamples(int16 *buf, int len);
void setVolume(byte volume);
void playSwitch(bool play);
bool loadResource(const byte *data, uint size);
virtual uint32 property(int prop, uint32 param);
private:
enum ChannelID {
kLeftChannel = 1,
kRightChannel = 2
};
struct AdLibOperator {
bool amplitudeMod;
bool vibrato;
bool envelopeType;
bool kbScaleRate;
byte frequencyMult; // (0-15)
byte kbScaleLevel; // (0-3)
byte totalLevel; // (0-63, 0=max, 63=min)
byte attackRate; // (0-15)
byte decayRate; // (0-15)
byte sustainLevel; // (0-15)
byte releaseRate; // (0-15)
byte waveForm; // (0-3)
};
struct AdLibModulator {
byte feedback; // (0-7)
bool algorithm;
};
struct AdLibPatch {
AdLibOperator op[2];
AdLibModulator mod;
};
struct Channel {
uint8 patch; // Patch setting
uint8 volume; // Channel volume (0-63)
uint8 pan; // Pan setting (0-127, 64 is center)
uint8 holdPedal; // Hold pedal setting (0 to 63 is off, 127 to 64 is on)
uint8 extraVoices; // The number of additional voices this channel optimally needs
uint16 pitchWheel; // Pitch wheel setting (0-16383, 8192 is center)
uint8 lastVoice; // Last voice used for this MIDI channel
bool enableVelocity; // Enable velocity control (SCI0)
Channel() : patch(0), volume(63), pan(64), holdPedal(0), extraVoices(0),
pitchWheel(8192), lastVoice(0), enableVelocity(false) { }
};
struct AdLibVoice {
int8 channel; // MIDI channel that this voice is assigned to or -1
int8 note; // Currently playing MIDI note or -1
int patch; // Currently playing patch or -1
uint8 velocity; // Note velocity
bool isSustained; // Flag indicating a note that is being sustained by the hold pedal
uint16 age; // Age of the current note
AdLibVoice() : channel(-1), note(-1), patch(-1), velocity(0), isSustained(false), age(0) { }
};
bool _stereo;
bool _isSCI0;
OPL::OPL *_opl;
bool _playSwitch;
int _masterVolume;
Channel _channels[MIDI_CHANNELS];
AdLibVoice _voices[kVoices];
byte *_rhythmKeyMap;
Common::Array<AdLibPatch> _patches;
void loadInstrument(const byte *ins);
void voiceOn(int voice, int note, int velocity);
void voiceOff(int voice);
void setPatch(int voice, int patch);
void setNote(int voice, int note, bool key);
void setVelocity(int voice);
void setOperator(int oper, AdLibOperator &op);
void setRegister(int reg, int value, int channels = kLeftChannel | kRightChannel);
void renewNotes(int channel, bool key);
void noteOn(int channel, int note, int velocity);
void noteOff(int channel, int note);
int findVoice(int channel);
void voiceMapping(int channel, int voices);
void assignVoices(int channel, int voices);
void releaseVoices(int channel, int voices);
void donateVoices();
int findVoiceBasic(int channel);
void setVelocityReg(int regOffset, int velocity, int kbScaleLevel, int pan);
int calcVelocity(int voice, int op);
};
class MidiPlayer_AdLib : public MidiPlayer {
public:
MidiPlayer_AdLib(SciVersion soundVersion) : MidiPlayer(soundVersion) { _driver = new MidiDriver_AdLib(g_system->getMixer()); }
~MidiPlayer_AdLib() {
delete _driver;
_driver = 0;
}
int open(ResourceManager *resMan);
void close();
byte getPlayId();
int getPolyphony() const { return MidiDriver_AdLib::kVoices; }
bool hasRhythmChannel() const { return false; }
void setVolume(byte volume) { static_cast<MidiDriver_AdLib *>(_driver)->setVolume(volume); }
void playSwitch(bool play) { static_cast<MidiDriver_AdLib *>(_driver)->playSwitch(play); }
void loadInstrument(int idx, byte *data);
};
static const byte registerOffset[MidiDriver_AdLib::kVoices] = {
0x00, 0x01, 0x02, 0x08, 0x09, 0x0A, 0x10, 0x11, 0x12
};
static const byte velocityMap1[64] = {
0x00, 0x0c, 0x0d, 0x0e, 0x0f, 0x11, 0x12, 0x13,
0x14, 0x16, 0x17, 0x18, 0x1a, 0x1b, 0x1c, 0x1d,
0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26,
0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2d, 0x2d, 0x2e,
0x2f, 0x30, 0x31, 0x32, 0x32, 0x33, 0x34, 0x34,
0x35, 0x36, 0x36, 0x37, 0x38, 0x38, 0x39, 0x3a,
0x3b, 0x3b, 0x3b, 0x3c, 0x3c, 0x3c, 0x3d, 0x3d,
0x3d, 0x3e, 0x3e, 0x3e, 0x3e, 0x3f, 0x3f, 0x3f
};
static const byte velocityMap2[64] = {
0x00, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a,
0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x21,
0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29,
0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x2f, 0x30,
0x31, 0x32, 0x32, 0x33, 0x34, 0x34, 0x35, 0x36,
0x36, 0x37, 0x38, 0x38, 0x39, 0x39, 0x3a, 0x3a,
0x3b, 0x3b, 0x3b, 0x3c, 0x3c, 0x3c, 0x3d, 0x3d,
0x3d, 0x3e, 0x3e, 0x3e, 0x3e, 0x3f, 0x3f, 0x3f
};
static const int ym3812_note[13] = {
0x157, 0x16b, 0x181, 0x198, 0x1b0, 0x1ca,
0x1e5, 0x202, 0x220, 0x241, 0x263, 0x287,
0x2ae
};
int MidiDriver_AdLib::open(bool isSCI0) {
int rate = _mixer->getOutputRate();
_stereo = STEREO;
debug(3, "ADLIB: Starting driver in %s mode", (isSCI0 ? "SCI0" : "SCI1"));
_isSCI0 = isSCI0;
_opl = OPL::Config::create(isStereo() ? OPL::Config::kDualOpl2 : OPL::Config::kOpl2);
// Try falling back to mono, thus plain OPL2 emualtor, when no Dual OPL2 is available.
if (!_opl && _stereo) {
_stereo = false;
_opl = OPL::Config::create(OPL::Config::kOpl2);
}
if (!_opl)
return -1;
_opl->init(rate);
setRegister(0xBD, 0);
setRegister(0x08, 0);
setRegister(0x01, 0x20);
MidiDriver_Emulated::open();
_mixer->playStream(Audio::Mixer::kPlainSoundType, &_mixerSoundHandle, this, -1, _mixer->kMaxChannelVolume, 0, DisposeAfterUse::NO);
return 0;
}
void MidiDriver_AdLib::close() {
_mixer->stopHandle(_mixerSoundHandle);
delete _opl;
delete[] _rhythmKeyMap;
}
void MidiDriver_AdLib::setVolume(byte volume) {
_masterVolume = volume;
renewNotes(-1, true);
}
// MIDI messages can be found at http://www.midi.org/techspecs/midimessages.php
void MidiDriver_AdLib::send(uint32 b) {
byte command = b & 0xf0;
byte channel = b & 0xf;
byte op1 = (b >> 8) & 0xff;
byte op2 = (b >> 16) & 0xff;
switch (command) {
case 0x80:
noteOff(channel, op1);
break;
case 0x90:
noteOn(channel, op1, op2);
break;
case 0xe0:
_channels[channel].pitchWheel = (op1 & 0x7f) | ((op2 & 0x7f) << 7);
renewNotes(channel, true);
break;
case 0xb0:
switch (op1) {
case 0x07:
_channels[channel].volume = op2 >> 1;
renewNotes(channel, true);
break;
case 0x0a:
_channels[channel].pan = op2;
renewNotes(channel, true);
break;
case 0x40:
_channels[channel].holdPedal = op2;
if (op2 == 0) {
for (int i = 0; i < kVoices; i++) {
if ((_voices[i].channel == channel) && _voices[i].isSustained)
voiceOff(i);
}
}
break;
case 0x4b:
#ifndef ADLIB_DISABLE_VOICE_MAPPING
voiceMapping(channel, op2);
#endif
break;
case 0x4e:
_channels[channel].enableVelocity = op2;
break;
case SCI_MIDI_CHANNEL_NOTES_OFF:
for (int i = 0; i < kVoices; i++)
if ((_voices[i].channel == channel) && (_voices[i].note != -1))
voiceOff(i);
break;
default:
//warning("ADLIB: ignoring MIDI command %02x %02x %02x", command | channel, op1, op2);
break;
}
break;
case 0xc0:
_channels[channel].patch = op1;
break;
// The original AdLib driver from sierra ignores aftertouch completely, so should we
case 0xa0: // Polyphonic key pressure (aftertouch)
case 0xd0: // Channel pressure (aftertouch)
break;
case 0xf0: // SysEx, ignore it
break;
default:
warning("ADLIB: Unknown event %02x", command);
}
}
void MidiDriver_AdLib::generateSamples(int16 *data, int len) {
if (isStereo())
len <<= 1;
_opl->readBuffer(data, len);
// Increase the age of the notes
for (int i = 0; i < kVoices; i++) {
if (_voices[i].note != -1)
_voices[i].age++;
}
}
void MidiDriver_AdLib::loadInstrument(const byte *ins) {
AdLibPatch patch;
// Set data for the operators
for (int i = 0; i < 2; i++) {
const byte *op = ins + i * 13;
patch.op[i].kbScaleLevel = op[0] & 0x3;
patch.op[i].frequencyMult = op[1] & 0xf;
patch.op[i].attackRate = op[3] & 0xf;
patch.op[i].sustainLevel = op[4] & 0xf;
patch.op[i].envelopeType = op[5];
patch.op[i].decayRate = op[6] & 0xf;
patch.op[i].releaseRate = op[7] & 0xf;
patch.op[i].totalLevel = op[8] & 0x3f;
patch.op[i].amplitudeMod = op[9];
patch.op[i].vibrato = op[10];
patch.op[i].kbScaleRate = op[11];
}
patch.op[0].waveForm = ins[26] & 0x3;
patch.op[1].waveForm = ins[27] & 0x3;
// Set data for the modulator
patch.mod.feedback = ins[2] & 0x7;
patch.mod.algorithm = !ins[12]; // Flag is inverted
_patches.push_back(patch);
}
void MidiDriver_AdLib::voiceMapping(int channel, int voices) {
int curVoices = 0;
for (int i = 0; i < kVoices; i++)
if (_voices[i].channel == channel)
curVoices++;
curVoices += _channels[channel].extraVoices;
if (curVoices < voices) {
debug(3, "ADLIB: assigning %i additional voices to channel %i", voices - curVoices, channel);
assignVoices(channel, voices - curVoices);
} else if (curVoices > voices) {
debug(3, "ADLIB: releasing %i voices from channel %i", curVoices - voices, channel);
releaseVoices(channel, curVoices - voices);
donateVoices();
}
}
void MidiDriver_AdLib::assignVoices(int channel, int voices) {
assert(voices > 0);
for (int i = 0; i < kVoices; i++)
if (_voices[i].channel == -1) {
_voices[i].channel = channel;
if (--voices == 0)
return;
}
_channels[channel].extraVoices += voices;
}
void MidiDriver_AdLib::releaseVoices(int channel, int voices) {
if (_channels[channel].extraVoices >= voices) {
_channels[channel].extraVoices -= voices;
return;
}
voices -= _channels[channel].extraVoices;
_channels[channel].extraVoices = 0;
for (int i = 0; i < kVoices; i++) {
if ((_voices[i].channel == channel) && (_voices[i].note == -1)) {
_voices[i].channel = -1;
if (--voices == 0)
return;
}
}
for (int i = 0; i < kVoices; i++) {
if (_voices[i].channel == channel) {
voiceOff(i);
_voices[i].channel = -1;
if (--voices == 0)
return;
}
}
}
void MidiDriver_AdLib::donateVoices() {
int freeVoices = 0;
for (int i = 0; i < kVoices; i++)
if (_voices[i].channel == -1)
freeVoices++;
if (freeVoices == 0)
return;
for (int i = 0; i < MIDI_CHANNELS; i++) {
if (_channels[i].extraVoices >= freeVoices) {
assignVoices(i, freeVoices);
_channels[i].extraVoices -= freeVoices;
return;
} else if (_channels[i].extraVoices > 0) {
assignVoices(i, _channels[i].extraVoices);
freeVoices -= _channels[i].extraVoices;
_channels[i].extraVoices = 0;
}
}
}
void MidiDriver_AdLib::renewNotes(int channel, bool key) {
for (int i = 0; i < kVoices; i++) {
// Update all notes playing this channel
if ((channel == -1) || (_voices[i].channel == channel)) {
if (_voices[i].note != -1)
setNote(i, _voices[i].note, key);
}
}
}
void MidiDriver_AdLib::noteOn(int channel, int note, int velocity) {
if (velocity == 0)
return noteOff(channel, note);
velocity >>= 1;
// Check for playable notes
if ((note < 12) || (note > 107))
return;
for (int i = 0; i < kVoices; i++) {
if ((_voices[i].channel == channel) && (_voices[i].note == note)) {
voiceOff(i);
voiceOn(i, note, velocity);
return;
}
}
#ifdef ADLIB_DISABLE_VOICE_MAPPING
int voice = findVoiceBasic(channel);
#else
int voice = findVoice(channel);
#endif
if (voice == -1) {
debug(3, "ADLIB: failed to find free voice assigned to channel %i", channel);
return;
}
voiceOn(voice, note, velocity);
}
// FIXME: Temporary, see comment at top of file regarding ADLIB_DISABLE_VOICE_MAPPING
int MidiDriver_AdLib::findVoiceBasic(int channel) {
int voice = -1;
int oldestVoice = -1;
int oldestAge = -1;
// Try to find a voice assigned to this channel that is free (round-robin)
for (int i = 0; i < kVoices; i++) {
int v = (_channels[channel].lastVoice + i + 1) % kVoices;
if (_voices[v].note == -1) {
voice = v;
break;
}
// We also keep track of the oldest note in case the search fails
if (_voices[v].age > oldestAge) {
oldestAge = _voices[v].age;
oldestVoice = v;
}
}
if (voice == -1) {
if (oldestVoice != -1) {
voiceOff(oldestVoice);
voice = oldestVoice;
} else {
return -1;
}
}
_voices[voice].channel = channel;
_channels[channel].lastVoice = voice;
return voice;
}
int MidiDriver_AdLib::findVoice(int channel) {
int voice = -1;
int oldestVoice = -1;
uint32 oldestAge = 0;
// Try to find a voice assigned to this channel that is free (round-robin)
for (int i = 0; i < kVoices; i++) {
int v = (_channels[channel].lastVoice + i + 1) % kVoices;
if (_voices[v].channel == channel) {
if (_voices[v].note == -1) {
voice = v;
break;
}
// We also keep track of the oldest note in case the search fails
// Notes started in the current time slice will not be selected
if (_voices[v].age > oldestAge) {
oldestAge = _voices[v].age;
oldestVoice = v;
}
}
}
if (voice == -1) {
if (oldestVoice != -1) {
voiceOff(oldestVoice);
voice = oldestVoice;
} else {
return -1;
}
}
_channels[channel].lastVoice = voice;
return voice;
}
void MidiDriver_AdLib::noteOff(int channel, int note) {
for (int i = 0; i < kVoices; i++) {
if ((_voices[i].channel == channel) && (_voices[i].note == note)) {
if (_channels[channel].holdPedal)
_voices[i].isSustained = true;
else
voiceOff(i);
return;
}
}
}
void MidiDriver_AdLib::voiceOn(int voice, int note, int velocity) {
int channel = _voices[voice].channel;
int patch;
_voices[voice].age = 0;
if ((channel == 9) && _rhythmKeyMap) {
patch = CLIP(note, 27, 88) + 101;
} else {
patch = _channels[channel].patch;
}
// Set patch if different from current patch
if (patch != _voices[voice].patch)
setPatch(voice, patch);
_voices[voice].velocity = velocity;
setNote(voice, note, true);
}
void MidiDriver_AdLib::voiceOff(int voice) {
_voices[voice].isSustained = false;
setNote(voice, _voices[voice].note, 0);
_voices[voice].note = -1;
_voices[voice].age = 0;
}
void MidiDriver_AdLib::setNote(int voice, int note, bool key) {
int channel = _voices[voice].channel;
int n, fre, oct;
float delta;
int bend = _channels[channel].pitchWheel;
if ((channel == 9) && _rhythmKeyMap) {
note = _rhythmKeyMap[CLIP(note, 27, 88) - 27];
}
_voices[voice].note = note;
delta = 0;
n = note % 12;
if (bend < 8192)
bend = 8192 - bend;
delta = (float)pow(2.0, (bend % 8192) / 8192.0);
if (bend > 8192)
fre = (int)(ym3812_note[n] * delta);
else
fre = (int)(ym3812_note[n] / delta);
oct = note / 12 - 1;
if (oct < 0)
oct = 0;
if (oct > 7)
oct = 7;
setRegister(0xA0 + voice, fre & 0xff);
setRegister(0xB0 + voice, (key << 5) | (oct << 2) | (fre >> 8));
setVelocity(voice);
}
void MidiDriver_AdLib::setVelocity(int voice) {
AdLibPatch &patch = _patches[_voices[voice].patch];
int pan = _channels[_voices[voice].channel].pan;
setVelocityReg(registerOffset[voice] + 3, calcVelocity(voice, 1), patch.op[1].kbScaleLevel, pan);
// In AM mode we need to set the level for both operators
if (_patches[_voices[voice].patch].mod.algorithm == 1)
setVelocityReg(registerOffset[voice], calcVelocity(voice, 0), patch.op[0].kbScaleLevel, pan);
}
int MidiDriver_AdLib::calcVelocity(int voice, int op) {
if (_isSCI0) {
int velocity = _masterVolume;
if (velocity > 0)
velocity += 3;
if (velocity > 15)
velocity = 15;
int insVelocity;
if (_channels[_voices[voice].channel].enableVelocity)
insVelocity = _voices[voice].velocity;
else
insVelocity = 63 - _patches[_voices[voice].patch].op[op].totalLevel;
// Note: Later SCI0 has a static table that is close to this formula, but not exactly the same.
// Early SCI0 does (velocity * (insVelocity / 15))
return velocity * insVelocity / 15;
} else {
AdLibOperator &oper = _patches[_voices[voice].patch].op[op];
int velocity = _channels[_voices[voice].channel].volume + 1;
velocity = velocity * (velocityMap1[_voices[voice].velocity] + 1) / 64;
velocity = velocity * (_masterVolume + 1) / 16;
if (--velocity < 0)
velocity = 0;
return velocityMap2[velocity] * (63 - oper.totalLevel) / 63;
}
}
void MidiDriver_AdLib::setVelocityReg(int regOffset, int velocity, int kbScaleLevel, int pan) {
if (!_playSwitch)
velocity = 0;
if (isStereo()) {
int velLeft = velocity;
int velRight = velocity;
if (pan > 0x40)
velLeft = velLeft * (0x7f - pan) / 0x3f;
else if (pan < 0x40)
velRight = velRight * pan / 0x40;
setRegister(0x40 + regOffset, (kbScaleLevel << 6) | (63 - velLeft), kLeftChannel);
setRegister(0x40 + regOffset, (kbScaleLevel << 6) | (63 - velRight), kRightChannel);
} else {
setRegister(0x40 + regOffset, (kbScaleLevel << 6) | (63 - velocity));
}
}
void MidiDriver_AdLib::setPatch(int voice, int patch) {
if ((patch < 0) || ((uint)patch >= _patches.size())) {
warning("ADLIB: Invalid patch %i requested", patch);
// Substitute instrument 0
patch = 0;
}
_voices[voice].patch = patch;
AdLibModulator &mod = _patches[patch].mod;
// Set the common settings for both operators
setOperator(registerOffset[voice], _patches[patch].op[0]);
setOperator(registerOffset[voice] + 3, _patches[patch].op[1]);
// Set the additional settings for the modulator
byte algorithm = mod.algorithm ? 1 : 0;
setRegister(0xC0 + voice, (mod.feedback << 1) | algorithm);
}
void MidiDriver_AdLib::setOperator(int reg, AdLibOperator &op) {
setRegister(0x40 + reg, (op.kbScaleLevel << 6) | op.totalLevel);
setRegister(0x60 + reg, (op.attackRate << 4) | op.decayRate);
setRegister(0x80 + reg, (op.sustainLevel << 4) | op.releaseRate);
setRegister(0x20 + reg, (op.amplitudeMod << 7) | (op.vibrato << 6)
| (op.envelopeType << 5) | (op.kbScaleRate << 4) | op.frequencyMult);
setRegister(0xE0 + reg, op.waveForm);
}
void MidiDriver_AdLib::setRegister(int reg, int value, int channels) {
if (channels & kLeftChannel) {
_opl->write(0x220, reg);
_opl->write(0x221, value);
}
if (isStereo()) {
if (channels & kRightChannel) {
_opl->write(0x222, reg);
_opl->write(0x223, value);
}
}
}
void MidiDriver_AdLib::playSwitch(bool play) {
_playSwitch = play;
renewNotes(-1, play);
}
bool MidiDriver_AdLib::loadResource(const byte *data, uint size) {
if ((size != 1344) && (size != 2690) && (size != 5382)) {
error("ADLIB: Unsupported patch format (%i bytes)", size);
return false;
}
for (int i = 0; i < 48; i++)
loadInstrument(data + (28 * i));
if (size == 1344) {
byte dummy[28] = {0};
// Only 48 instruments, add dummies
for (int i = 0; i < 48; i++)
loadInstrument(dummy);
} else if (size == 2690) {
for (int i = 48; i < 96; i++)
loadInstrument(data + 2 + (28 * i));
} else {
// SCI1.1 and later
for (int i = 48; i < 190; i++)
loadInstrument(data + (28 * i));
_rhythmKeyMap = new byte[kRhythmKeys];
memcpy(_rhythmKeyMap, data + 5320, kRhythmKeys);
}
return true;
}
uint32 MidiDriver_AdLib::property(int prop, uint32 param) {
switch(prop) {
case MIDI_PROP_MASTER_VOLUME:
if (param != 0xffff)
_masterVolume = param;
return _masterVolume;
default:
break;
}
return 0;
}
int MidiPlayer_AdLib::open(ResourceManager *resMan) {
assert(resMan != NULL);
// Load up the patch.003 file, parse out the instruments
Resource *res = resMan->findResource(ResourceId(kResourceTypePatch, 3), 0);
bool ok = false;
if (res) {
ok = static_cast<MidiDriver_AdLib *>(_driver)->loadResource(res->data, res->size);
} else {
// Early SCI0 games have the sound bank embedded in the AdLib driver
Common::File f;
if (f.open("ADL.DRV")) {
int size = f.size();
const uint patchSize = 1344;
if ((size == 5684) || (size == 5720) || (size == 5727)) {
byte *buf = new byte[patchSize];
if (f.seek(0x45a) && (f.read(buf, patchSize) == patchSize))
ok = static_cast<MidiDriver_AdLib *>(_driver)->loadResource(buf, patchSize);
delete[] buf;
}
}
}
if (!ok) {
warning("ADLIB: Failed to load patch.003");
return -1;
}
return static_cast<MidiDriver_AdLib *>(_driver)->open(_version <= SCI_VERSION_0_LATE);
}
void MidiPlayer_AdLib::close() {
if (_driver) {
_driver->close();
}
}
byte MidiPlayer_AdLib::getPlayId() {
switch (_version) {
case SCI_VERSION_0_EARLY:
return 0x01;
case SCI_VERSION_0_LATE:
return 0x04;
default:
return 0x00;
}
}
MidiPlayer *MidiPlayer_AdLib_create(SciVersion _soundVersion) {
return new MidiPlayer_AdLib(_soundVersion);
}
} // End of namespace Sci
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