mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-21 09:21:08 +00:00
368 lines
9.0 KiB
C++
368 lines
9.0 KiB
C++
/* 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.
|
|
*
|
|
*/
|
|
|
|
#include "kyra/sound_intern.h"
|
|
|
|
#include "audio/mixer.h"
|
|
#include "audio/softsynth/pcspk.h"
|
|
|
|
namespace Kyra {
|
|
|
|
MidiDriver_PCSpeaker::MidiDriver_PCSpeaker(Audio::Mixer *mixer)
|
|
: MidiDriver_Emulated(mixer), _rate(mixer->getOutputRate()) {
|
|
_timerValue = 0;
|
|
memset(_channel, 0, sizeof(_channel));
|
|
memset(_note, 0, sizeof(_note));
|
|
|
|
for (int i = 0; i < 2; ++i)
|
|
_note[i].hardwareChannel = 0xFF;
|
|
|
|
_speaker = new Audio::PCSpeaker(_rate);
|
|
assert(_speaker);
|
|
_mixer->playStream(Audio::Mixer::kMusicSoundType, &_mixerSoundHandle, this, -1, Audio::Mixer::kMaxChannelVolume, 0, DisposeAfterUse::NO, true);
|
|
|
|
_countdown = 0xFFFF;
|
|
_hardwareChannel[0] = 0xFF;
|
|
_modulationFlag = false;
|
|
}
|
|
|
|
MidiDriver_PCSpeaker::~MidiDriver_PCSpeaker() {
|
|
_mixer->stopHandle(_mixerSoundHandle);
|
|
delete _speaker;
|
|
_speaker = 0;
|
|
}
|
|
|
|
void MidiDriver_PCSpeaker::send(uint32 data) {
|
|
Common::StackLock lock(_mutex);
|
|
|
|
uint8 channel = data & 0x0F;
|
|
uint8 param1 = (data >> 8) & 0xFF;
|
|
uint8 param2 = (data >> 16) & 0xFF;
|
|
|
|
uint8 flags = 0x00;
|
|
|
|
if (channel > 1)
|
|
return;
|
|
|
|
switch (data & 0xF0) {
|
|
case 0x80: // note off
|
|
noteOff(channel, param1);
|
|
return;
|
|
|
|
case 0x90: // note on
|
|
if (channel > 1)
|
|
return;
|
|
|
|
if (param2)
|
|
noteOn(channel, param1);
|
|
else
|
|
noteOff(channel, param1);
|
|
return;
|
|
|
|
case 0xB0: // controller
|
|
switch (param1) {
|
|
case 0x01: // modulation
|
|
_channel[channel].modulation = param2;
|
|
break;
|
|
|
|
case 0x40: // hold
|
|
_channel[channel].hold = param2;
|
|
if (param2 < 0x40)
|
|
resetController(channel);
|
|
return;
|
|
|
|
case 0x70: // voice protect
|
|
_channel[channel].voiceProtect = param2;
|
|
return;
|
|
|
|
case 0x79: // all notes off
|
|
_channel[channel].hold = 0;
|
|
resetController(channel);
|
|
_channel[channel].modulation = 0;
|
|
_channel[channel].pitchBendLow = 0;
|
|
_channel[channel].pitchBendHigh = 0x40;
|
|
flags = 0x01;
|
|
break;
|
|
|
|
default:
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case 0xE0: // pitch bend
|
|
flags = 0x01;
|
|
_channel[channel].pitchBendLow = param1;
|
|
_channel[channel].pitchBendHigh = param2;
|
|
break;
|
|
|
|
default:
|
|
return;
|
|
}
|
|
|
|
for (int i = 0; i < 2; ++i) {
|
|
if (_note[i].enabled && _note[i].midiChannel == channel) {
|
|
_note[i].flags |= flags;
|
|
setupTone(i);
|
|
}
|
|
}
|
|
}
|
|
|
|
void MidiDriver_PCSpeaker::resetController(int channel) {
|
|
for (int i = 0; i < 2; ++i) {
|
|
if (_note[i].enabled && _note[i].midiChannel == channel && _note[i].processHold)
|
|
noteOff(channel, _note[i].note);
|
|
}
|
|
}
|
|
|
|
void MidiDriver_PCSpeaker::noteOn(int channel, int note) {
|
|
int n = 0;
|
|
|
|
while (n < 2 && _note[n].enabled)
|
|
++n;
|
|
|
|
if (n >= 2)
|
|
return;
|
|
|
|
_note[n].midiChannel = channel;
|
|
_note[n].note = note;
|
|
_note[n].enabled = true;
|
|
_note[n].processHold = false;
|
|
_note[n].hardwareFlags = 0x20;
|
|
_note[n].priority = 0x7FFF;
|
|
_note[n].flags = 0x01;
|
|
|
|
turnNoteOn(n);
|
|
}
|
|
|
|
void MidiDriver_PCSpeaker::turnNoteOn(int note) {
|
|
if (_hardwareChannel[0] == 0xFF) {
|
|
_note[note].hardwareChannel = 0;
|
|
++_channel[_note[note].midiChannel].noteCount;
|
|
_hardwareChannel[0] = _note[note].midiChannel;
|
|
_note[note].flags = 0x01;
|
|
|
|
setupTone(note);
|
|
} else {
|
|
overwriteNote(note);
|
|
}
|
|
}
|
|
|
|
void MidiDriver_PCSpeaker::overwriteNote(int note) {
|
|
int totalNotes = 0;
|
|
for (int i = 0; i < 2; ++i) {
|
|
if (_note[i].enabled) {
|
|
++totalNotes;
|
|
const int channel = _note[i].midiChannel;
|
|
|
|
uint16 priority = 0xFFFF;
|
|
if (_channel[channel].voiceProtect < 0x40)
|
|
priority = _note[i].priority;
|
|
|
|
if (_channel[channel].noteCount > priority)
|
|
priority = 0;
|
|
else
|
|
priority -= _channel[channel].noteCount;
|
|
|
|
_note[i].precedence = priority;
|
|
}
|
|
}
|
|
|
|
if (totalNotes <= 1)
|
|
return;
|
|
|
|
do {
|
|
uint16 maxValue = 0;
|
|
uint16 minValue = 0xFFFF;
|
|
int newNote = 0;
|
|
|
|
for (int i = 0; i < 2; ++i) {
|
|
if (_note[i].enabled) {
|
|
if (_note[i].hardwareChannel == 0xFF) {
|
|
if (_note[i].precedence >= maxValue) {
|
|
maxValue = _note[i].precedence;
|
|
newNote = i;
|
|
}
|
|
} else {
|
|
if (_note[i].precedence <= minValue) {
|
|
minValue = _note[i].precedence;
|
|
note = i;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (maxValue < minValue)
|
|
return;
|
|
|
|
turnNoteOff(_note[note].hardwareChannel);
|
|
_note[note].enabled = false;
|
|
|
|
_note[newNote].hardwareChannel = _note[note].hardwareChannel;
|
|
++_channel[_note[newNote].midiChannel].noteCount;
|
|
_hardwareChannel[_note[note].hardwareChannel] = _note[newNote].midiChannel;
|
|
_note[newNote].flags = 0x01;
|
|
|
|
setupTone(newNote);
|
|
} while (--totalNotes);
|
|
}
|
|
|
|
void MidiDriver_PCSpeaker::noteOff(int channel, int note) {
|
|
for (int i = 0; i < 2; ++i) {
|
|
if (_note[i].enabled && _note[i].note == note && _note[i].midiChannel == channel) {
|
|
if (_channel[i].hold < 0x40) {
|
|
turnNoteOff(i);
|
|
_note[i].enabled = false;
|
|
} else {
|
|
_note[i].processHold = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void MidiDriver_PCSpeaker::turnNoteOff(int note) {
|
|
if (_note[note].hardwareChannel != 0xFF) {
|
|
_note[note].hardwareFlags &= 0xDF;
|
|
_note[note].flags |= 1;
|
|
|
|
setupTone(note);
|
|
|
|
--_channel[_note[note].midiChannel].noteCount;
|
|
|
|
_hardwareChannel[_note[note].hardwareChannel] = 0xFF;
|
|
_note[note].hardwareChannel = 0xFF;
|
|
}
|
|
}
|
|
|
|
void MidiDriver_PCSpeaker::setupTone(int note) {
|
|
if (_note[note].hardwareChannel == 0xFF)
|
|
return;
|
|
|
|
if (!(_note[note].flags & 0x01))
|
|
return;
|
|
|
|
if (!(_note[note].hardwareFlags & 0x20)) {
|
|
_speaker->stop();
|
|
} else {
|
|
const int midiChannel = _note[note].midiChannel;
|
|
uint16 pitchBend = (_channel[midiChannel].pitchBendHigh << 7) | _channel[midiChannel].pitchBendLow;
|
|
|
|
int noteValue = _note[note].note;
|
|
|
|
noteValue -= 24;
|
|
do {
|
|
noteValue += 12;
|
|
} while (noteValue < 0);
|
|
|
|
noteValue += 12;
|
|
do {
|
|
noteValue -= 12;
|
|
} while (noteValue > 95);
|
|
|
|
int16 modulation = _note[note].modulation;
|
|
|
|
int tableIndex = MAX(noteValue - 12, 0);
|
|
uint16 note1 = (_noteTable2[tableIndex] << 8) | _noteTable1[tableIndex];
|
|
tableIndex = MIN(noteValue + 12, 95);
|
|
uint16 note2 = (_noteTable2[tableIndex] << 8) | _noteTable1[tableIndex];
|
|
uint16 note3 = (_noteTable2[noteValue] << 8) | _noteTable1[noteValue];
|
|
|
|
int32 countdown = pitchBend - 0x2000;
|
|
countdown += modulation;
|
|
|
|
if (countdown >= 0)
|
|
countdown *= (note2 - note3);
|
|
else
|
|
countdown *= (note3 - note1);
|
|
|
|
countdown /= 0x2000;
|
|
countdown += note3;
|
|
|
|
countdown = uint16(countdown & 0xFFFF);
|
|
if (countdown != _countdown)
|
|
_countdown = countdown;
|
|
|
|
_speaker->play(Audio::PCSpeaker::kWaveFormSquare, 1193180 / _countdown, -1);
|
|
}
|
|
|
|
_note[note].flags &= 0xFE;
|
|
}
|
|
|
|
void MidiDriver_PCSpeaker::generateSamples(int16 *buffer, int numSamples) {
|
|
Common::StackLock lock(_mutex);
|
|
_speaker->readBuffer(buffer, numSamples);
|
|
}
|
|
|
|
void MidiDriver_PCSpeaker::onTimer() {
|
|
/*Common::StackLock lock(_mutex);
|
|
|
|
_timerValue += 20;
|
|
if (_timerValue < 120)
|
|
return;
|
|
_timerValue -= 120;
|
|
|
|
_modulationFlag = !_modulationFlag;
|
|
for (int i = 0; i < 2; ++i) {
|
|
if (_note[i].enabled) {
|
|
uint16 modValue = 5 * _channel[_note[i].midiChannel].modulation;
|
|
if (_modulationFlag)
|
|
modValue = -modValue;
|
|
_note[i].modulation = modValue;
|
|
_note[i].flags |= 1;
|
|
|
|
setupTone(i);
|
|
}
|
|
}*/
|
|
}
|
|
|
|
const uint8 MidiDriver_PCSpeaker::_noteTable1[] = {
|
|
0x88, 0xB5, 0x4E, 0x40, 0x41, 0xCD, 0xC4, 0x3D,
|
|
0x43, 0x7C, 0x2A, 0xD6, 0x88, 0xB5, 0xFF, 0xD1,
|
|
0x20, 0xA7, 0xE2, 0x1E, 0xCE, 0xBE, 0xF2, 0x8A,
|
|
0x44, 0x41, 0x7F, 0xE8, 0x90, 0x63, 0x63, 0x8F,
|
|
0xE7, 0x5F, 0x01, 0xBD, 0xA2, 0xA0, 0xBF, 0xF4,
|
|
0x48, 0xB1, 0x31, 0xC7, 0x70, 0x2F, 0xFE, 0xE0,
|
|
0xD1, 0xD0, 0xDE, 0xFB, 0x24, 0x58, 0x98, 0xE3,
|
|
0x39, 0x97, 0xFF, 0x6F, 0xE8, 0x68, 0xEF, 0x7D,
|
|
0x11, 0xAC, 0x4C, 0xF1, 0x9C, 0x4B, 0xFF, 0xB7,
|
|
0x74, 0x34, 0xF7, 0xBE, 0x88, 0x56, 0x26, 0xF8,
|
|
0xCE, 0xA5, 0x7F, 0x5B, 0x3A, 0x1A, 0xFB, 0xDF,
|
|
0xC4, 0xAB, 0x93, 0x7C, 0x67, 0x52, 0x3F, 0x2D
|
|
};
|
|
|
|
const uint8 MidiDriver_PCSpeaker::_noteTable2[] = {
|
|
0x8E, 0x86, 0xFD, 0xF0, 0xE2, 0xD5, 0xC9, 0xBE,
|
|
0xB3, 0xA9, 0xA0, 0x96, 0x8E, 0x86, 0x7E, 0x77,
|
|
0x71, 0x6A, 0x64, 0x5F, 0x59, 0x54, 0x4F, 0x4B,
|
|
0x47, 0x43, 0x3F, 0x3B, 0x38, 0x35, 0x32, 0x2F,
|
|
0x2C, 0x2A, 0x28, 0x25, 0x23, 0x21, 0x1F, 0x1D,
|
|
0x1C, 0x1A, 0x19, 0x17, 0x16, 0x15, 0x13, 0x12,
|
|
0x11, 0x10, 0x0F, 0x0E, 0x0E, 0x0D, 0x0C, 0x0B,
|
|
0x0B, 0x0A, 0x09, 0x09, 0x08, 0x08, 0x07, 0x07,
|
|
0x07, 0x06, 0x06, 0x05, 0x05, 0x05, 0x04, 0x04,
|
|
0x04, 0x04, 0x03, 0x03, 0x03, 0x03, 0x03, 0x02,
|
|
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01,
|
|
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01
|
|
};
|
|
|
|
} // End of namespace Kyra
|
|
|