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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 "sound/audiostream.h"
#include "common/config-manager.h"
#include "sci/sci.h"
#include "sci/engine/state.h"
#include "sci/engine/kernel.h"
#include "sci/resource.h"
#include "sci/sfx/music.h"
#include "sci/sfx/softseq/pcjr.h"
namespace Sci {
static const int nMidiParams[] = { 2, 2, 2, 2, 1, 1, 2, 0 };
static int f_compare(const void *arg1, const void *arg2) {
return ((const MusicEntry *)arg2)->prio - ((const MusicEntry *)arg1)->prio;
}
SciMusic::SciMusic(SciVersion soundVersion)
: _soundVersion(soundVersion) {
// Reserve some space in the playlist, to avoid expensive insertion
// operations
_playList.reserve(10);
}
SciMusic::~SciMusic() {
if (_pMidiDrv) {
_pMidiDrv->close();
delete _pMidiDrv;
}
}
//----------------------------------------
void SciMusic::init() {
// system init
_pMixer = g_system->getMixer();
_pMixer->setVolumeForSoundType(Audio::Mixer::kSFXSoundType, ConfMan.getInt(
"sfx_volume"));
_pMixer->setVolumeForSoundType(Audio::Mixer::kSpeechSoundType,
ConfMan.getInt("speech_volume"));
_pMixer->setVolumeForSoundType(Audio::Mixer::kMusicSoundType,
ConfMan.getInt("music_volume"));
// SCI sound init
_dwTempo = 0;
_midiType = MidiDriver::detectMusicDriver(MDT_MIDI | MDT_ADLIB | MDT_PCSPK);
// Sanity check
if (_midiType != MD_ADLIB && _midiType != MD_PCJR && _midiType != MD_PCSPK) {
warning("Unhandled MIDI type, switching to Adlib");
_midiType = MD_ADLIB;
}
switch (_midiType) {
case MD_ADLIB:
// FIXME: There's no Amiga sound option, so we hook it up to Adlib
if (((SciEngine *)g_engine)->getPlatform() == Common::kPlatformAmiga)
_pMidiDrv = MidiPlayer_Amiga_create();
else
_pMidiDrv = MidiPlayer_Adlib_create();
break;
case MD_PCJR:
_pMidiDrv = new MidiPlayer_PCJr();
break;
case MD_PCSPK:
_pMidiDrv = new MidiPlayer_PCSpeaker();
break;
default:
break;
}
if (_pMidiDrv) {
_pMidiDrv->open();
_pMidiDrv->setTimerCallback(this, &miditimerCallback);
_dwTempo = _pMidiDrv->getBaseTempo();
} else
warning("Can't initialise music driver");
_bMultiMidi = ConfMan.getBool("multi_midi");
}
//----------------------------------------
bool SciMusic::saveState(Common::OutSaveFile *pFile) {
// TODO
#if 0
pFile->writeString("AUDIO\n");
// playlist
int sz = _playList.size();
pFile->writeUint16LE(sz);
for(int i = 0; i < sz; i++) {
pFile->writeUint16LE(ptr2heap((byte*)_playList[i]));
// member variable
pFile->writeUint16LE(_audVolNum);
pFile->writeByte(_langID);
pFile->writeUint16LE(_audioType);
pFile->writeUint16LE(_audioRate);
// TODO: current playing stream (hCurrentAud) info
}
#endif
return true;
}
//----------------------------------------
bool SciMusic::restoreState(Common::InSaveFile *pFile){
if (pFile->readLine() != "AUDIO")
return false;
return true;
}
//----------------------------------------
void SciMusic::stopAll() {
_pMixer->stopAll();
while (!_playList.empty()) {
soundStop(_playList[0]);
soundKill(_playList[0]);
}
}
//----------------------------------------
void SciMusic::miditimerCallback(void *p) {
SciMusic* aud = (SciMusic *)p;
aud->onTimer();
}
//----------------------------------------
uint16 SciMusic::soundGetVoices() {
switch (_midiType) {
case MD_PCSPK:
return 1;
case MD_PCJR:
return 3;
case MD_ADLIB:
return 8;
case MD_MT32:
return 16;
default:
return 1;
}
}
//----------------------------------------
void SciMusic::sortPlayList() {
MusicEntry ** pData = _playList.begin();
qsort(pData, _playList.size(), sizeof(MusicEntry *), &f_compare);
}
#if 0
void SciMusic::patchSysEx(byte * addr, byte *pdata, int len) {
byte *buff = new byte[7 + len + 1];
uint16 chk = 0;
int i;
buff[0] = 0x41;
buff[1] = 0x10;
buff[2] = 0x16;
buff[3] = 0x12;
buff[4] = addr[0];
buff[5] = addr[1];
buff[6] = addr[2];
for (i = 0; i < len; i++) {
buff[7 + i] = pdata[i];
chk += pdata[i];
}
chk += addr[0] + addr[1] + addr[2];
buff[7 + i] = 128 - chk % 128;
_pMidiDrv->sysEx(buff, len + 8);
delete[] buff;
}
void SciMusic::patchUpdateAddr(byte *addr, int len) {
addr[2] += len;
if (addr[2] >= 0x7F) {
addr[1]++;
addr[2] -= 0x80;
}
}
#endif
// FIXME: This should be done at the driver level
#if 0
void SciMusic::loadPatch() {
if (_midiType == MD_MT32)
loadPatchMT32();
}
#endif
#if 0
// currently loads patch 1.pat for Roland/MT-32 device
void SciMusic::loadPatchMT32() {
//byte sysText[] = { 0x20, 0, 0 };
byte sysMem[] = { 0x5, 0, 0 }; // patch memory
byte sysRhytm[] = { 0x3, 0x1, 0x10 }; // rhytm
byte sysMsg3[15] = { 0x41, 0x10, 0x16, 0x12, 0x52, 0, 0xA, 0x16, 0x16,
0x16, 0x16, 0x16, 0x16, 0x20, 0x80 };
byte sysTimbre[] = { 0x8, 0, 0 }; // timbre memory
byte sysSystem[] = { 0x10, 0, 4 }; // partial reserve & midi channel
byte arr[3][11];
Resource *res = ((SciEngine *)g_engine)->getResourceManager()->findResource(ResourceId(kResourceTypePatch, 1), 0);
if (res) {
byte *pData = res->data, *p;
// welcome message
//patchSysEx(sysText, pData + 20, 20);
// reading reverb mode, time and level
p = pData + 74;
for (int i = 0; i < 11; i++) {
arr[0][i] = *p++;
arr[1][i] = *p++;
arr[2][i] = *p++;
}
// sub_657 - patch memory
for (int i = 0; i < 48; i++) {
patchSysEx(sysMem, p, 8);
patchUpdateAddr(sysMem, 8);
p += 8;
}
// sub_696 - timbre
byte dl = *p++, cl = 0;
while (dl--) {
patchSysEx(sysTimbre, p, 14); // common area
patchUpdateAddr(sysTimbre, 14);
patchSysEx(sysTimbre, p + 14, 58);// partial 1
patchUpdateAddr(sysTimbre, 58);
patchSysEx(sysTimbre, p + 72, 58);// partial 2
patchUpdateAddr(sysTimbre, 58);
patchSysEx(sysTimbre, p + 130, 58);// partial 3
patchUpdateAddr(sysTimbre, 58);
patchSysEx(sysTimbre, p + 188, 58);// partial 4
patchUpdateAddr(sysTimbre, 58);
p += 246;
cl += 2;
sysTimbre[1] = cl;
sysTimbre[2] = 0;
}
// patch memory or rhytm
uint16 flag = READ_BE_UINT16(p);
p += 2;
if (flag == 0xABCD) {
// sub_657
for (int i = 0; i < 48; i++) {
patchSysEx(sysMem, p, 8);
patchUpdateAddr(sysMem, 8);
p += 8;
}
} else if (flag == 0xDCBA) {
// sub_756
for (int i = 0; i < 64; i++) {
patchSysEx(sysRhytm, p, 4);
patchUpdateAddr(sysRhytm, 4);
p += 4;
}
patchSysEx(sysSystem, p, 18);
}
// after-init text message
//patchSysEx(sysText, pData, 20);
// some final sysex
_pMidiDrv->sysEx(sysMsg3, 15);
// releasing patch resource
//g_sci->ResMgr.ResUnload(SCI_RES_PATCH, 1);
debug("MT-32 patch loaded");
}
}
#endif
//----------------------------------------
void SciMusic::soundInitSnd(MusicEntry *pSnd) {
SoundResource::Track *track = NULL;
int channelFilterMask = 0;
switch (_midiType) {
case MD_PCSPK:
track = pSnd->soundRes->getTrackByType(SoundResource::TRACKTYPE_SPEAKER);
break;
case MD_PCJR:
track = pSnd->soundRes->getTrackByType(SoundResource::TRACKTYPE_TANDY);
break;
case MD_ADLIB:
track = pSnd->soundRes->getTrackByType(SoundResource::TRACKTYPE_ADLIB);
break;
case MD_MT32:
track = pSnd->soundRes->getTrackByType(SoundResource::TRACKTYPE_MT32);
break;
default:
break;
}
// attempting to select default MT-32/Roland track
if (!track)
track = pSnd->soundRes->getTrackByType(SoundResource::TRACKTYPE_MT32);
if (track) {
// if MIDI device is selected but there is no digital track in sound resource
// try to use adlib's digital sample if possible
if (_midiType <= MD_MT32 && track->nDigital == 0xFF && _bMultiMidi) {
if (pSnd->soundRes->getTrackByType(SoundResource::TRACKTYPE_ADLIB)->nDigital != 0xFF)
track = pSnd->soundRes->getTrackByType(SoundResource::TRACKTYPE_ADLIB);
}
// play digital sample
if (track->nDigital != 0xFF) {
byte *channelData = track->channels[track->nDigital].data;
int rate = READ_LE_UINT16(channelData);
uint32 size = READ_LE_UINT16(channelData + 2);
assert(READ_LE_UINT16(channelData + 4) == 0); // Possibly a compression flag
//assert(READ_LE_UINT16(channelData + 6) == size);
if (pSnd->pStreamAud)
delete pSnd->pStreamAud;
pSnd->pStreamAud = Audio::makeLinearInputStream(channelData + 8, size, rate,
Audio::Mixer::FLAG_UNSIGNED, 0, 0);
pSnd->hCurrentAud = Audio::SoundHandle();
} else {
// play MIDI track
if (pSnd->pMidiParser == NULL) {
pSnd->pMidiParser = new MidiParser_SCI();
pSnd->pMidiParser->setMidiDriver(_pMidiDrv);
pSnd->pMidiParser->setTimerRate(_dwTempo);
}
// Find out what channels to filter for SCI0
channelFilterMask = pSnd->soundRes->getChannelFilterMask(_pMidiDrv->getPlayMask(_soundVersion));
pSnd->pMidiParser->loadMusic(track, pSnd, channelFilterMask, _soundVersion);
}
}
}
//----------------------------------------
void SciMusic::onTimer() {
_mutex.lock();
uint sz = _playList.size();
for (uint i = 0; i < sz; i++) {
if (_playList[i]->status != kSndStatusPlaying)
continue;
if (_playList[i]->pMidiParser) {
if (_playList[i]->fadeStep)
doFade(_playList[i]);
_playList[i]->pMidiParser->onTimer();
_playList[i]->ticker = (uint16)_playList[i]->pMidiParser->getTick();
} else if (_playList[i]->pStreamAud) {
if (!_pMixer->isSoundHandleActive(_playList[i]->hCurrentAud)) {
_playList[i]->ticker = 0xFFFF;
_playList[i]->status = kSndStatusStopped;
// Signal the engine scripts that the sound is done playing
// FIXME: is there any other place this can be triggered properly?
SegManager *segMan = ((SciEngine *)g_engine)->getEngineState()->_segMan;
PUT_SEL32V(segMan, _playList[i]->soundObj, signal, SIGNAL_OFFSET);
PUT_SEL32V(segMan, _playList[i]->soundObj, state, kSndStatusStopped);
} else {
_playList[i]->ticker = (uint16)(_pMixer->getSoundElapsedTime(
_playList[i]->hCurrentAud) * 0.06);
}
}
}//for()
_mutex.unlock();
}
//---------------------------------------------
void SciMusic::doFade(MusicEntry *pSnd) {
// This is called from inside onTimer, where the mutex is already locked
if (pSnd->fadeTicker)
pSnd->fadeTicker--;
else {
pSnd->fadeTicker = pSnd->fadeTickerStep;
if (pSnd->volume + pSnd->fadeStep > pSnd->fadeTo) {
pSnd->volume = pSnd->fadeTo;
pSnd->fadeStep = 0;
} else
pSnd->volume += pSnd->fadeStep;
pSnd->pMidiParser->setVolume(pSnd->volume);
}
}
//---------------------------------------------
void SciMusic::soundPlay(MusicEntry *pSnd) {
uint sz = _playList.size(), i;
// searching if sound is already in _playList
for (i = 0; i < sz && _playList[i] != pSnd; i++)
;
if (i == sz) {// not found
_mutex.lock();
_playList.push_back(pSnd);
sortPlayList();
_mutex.unlock();
}
if (pSnd->pStreamAud && !_pMixer->isSoundHandleActive(pSnd->hCurrentAud)) {
_pMixer->playInputStream(Audio::Mixer::kSFXSoundType, &pSnd->hCurrentAud,
pSnd->pStreamAud, -1, pSnd->volume, 0, false);
} else if (pSnd->pMidiParser) {
_mutex.lock();
pSnd->pMidiParser->setVolume(pSnd->volume);
if (pSnd->status == kSndStatusStopped)
pSnd->pMidiParser->jumpToTick(0);
_mutex.unlock();
}
pSnd->status = kSndStatusPlaying;
}
//---------------------------------------------
void SciMusic::soundStop(MusicEntry *pSnd) {
pSnd->status = kSndStatusStopped;
if (pSnd->pStreamAud)
_pMixer->stopHandle(pSnd->hCurrentAud);
if (pSnd->pMidiParser)
pSnd->pMidiParser->stop();
}
//---------------------------------------------
void SciMusic::soundSetVolume(MusicEntry *pSnd, byte volume) {
if (pSnd->pStreamAud)
_pMixer->setChannelVolume(pSnd->hCurrentAud, volume);
else if (pSnd->pMidiParser)
pSnd->pMidiParser->setVolume(volume);
}
//---------------------------------------------
void SciMusic::soundSetPriority(MusicEntry *pSnd, byte prio) {
_mutex.lock();
pSnd->prio = prio;
sortPlayList();
_mutex.unlock();
}
//---------------------------------------------
void SciMusic::soundKill(MusicEntry *pSnd) {
pSnd->status = kSndStatusStopped;
if (pSnd->pMidiParser) {
pSnd->pMidiParser->unloadMusic();
delete pSnd->pMidiParser;
pSnd->pMidiParser = NULL;
}
if (pSnd->pStreamAud) {
_pMixer->stopHandle(pSnd->hCurrentAud);
pSnd->pStreamAud = NULL;
}
_mutex.lock();
uint sz = _playList.size(), i;
// Remove sound from playlist
for (i = 0; i < sz; i++) {
if (_playList[i] == pSnd) {
delete _playList[i]->soundRes;
delete _playList[i];
_playList.remove_at(i);
break;
}
}
_mutex.unlock();
}
//---------------------------------------------
void SciMusic::soundPause(MusicEntry *pSnd) {
pSnd->status = kSndStatusPaused;
if (pSnd->pStreamAud)
_pMixer->pauseHandle(pSnd->hCurrentAud, true);
else if (pSnd->pMidiParser)
pSnd->pMidiParser->pause();
}
//---------------------------------------------
uint16 SciMusic::soundGetMasterVolume() {
return _pMixer->getVolumeForSoundType(Audio::Mixer::kMusicSoundType) * 0xF
/ Audio::Mixer::kMaxMixerVolume;
}
//---------------------------------------------
void SciMusic::soundSetMasterVolume(uint16 vol) {
vol = vol & 0xF; // 0..15
vol = vol * Audio::Mixer::kMaxMixerVolume / 0xF;
_pMixer->setVolumeForSoundType(Audio::Mixer::kMusicSoundType, vol);
_pMixer->setVolumeForSoundType(Audio::Mixer::kSFXSoundType, vol);
_pMixer->setVolumeForSoundType(Audio::Mixer::kSpeechSoundType, vol);
_pMixer->setVolumeForSoundType(Audio::Mixer::kPlainSoundType, vol);
}
//---------------------------------------------
// MidiParser_SCI
//
MidiParser_SCI::MidiParser_SCI() :
MidiParser() {
_mixedData = NULL;
// mididata contains delta in 1/60th second
// values of ppqn and tempo are found experimentally and may be wrong
_ppqn = 1;
setTempo(16667);
_signalSet = false;
_signalToSet = 0;
}
//---------------------------------------------
MidiParser_SCI::~MidiParser_SCI() {
unloadMusic();
}
//---------------------------------------------
bool MidiParser_SCI::loadMusic(SoundResource::Track *track, MusicEntry *psnd, int channelFilterMask, SciVersion soundVersion) {
unloadMusic();
_track = track;
_pSnd = psnd;
_soundVersion = soundVersion;
setVolume(psnd->volume);
if (channelFilterMask) {
// SCI0 only has 1 data stream, but we need to filter out channels depending on music hardware selection
midiFilterChannels(channelFilterMask);
} else {
midiMixChannels();
}
_num_tracks = 1;
_tracks[0] = _mixedData;
setTrack(0);
_loopTick = 0;
return true;
}
void MidiParser_SCI::unloadMusic() {
allNotesOff();
resetTracking();
_num_tracks = 0;
if (_mixedData) {
delete[] _mixedData;
_mixedData = NULL;
}
}
void MidiParser_SCI::parseNextEvent(EventInfo &info) {
SegManager *segMan = ((SciEngine *)g_engine)->getEngineState()->_segMan; // HACK
// Set signal AFTER waiting for delta, otherwise we would set signal too soon resulting in all sorts of bugs
if (_signalSet) {
_signalSet = false;
PUT_SEL32V(segMan, _pSnd->soundObj, signal, _signalToSet);
debugC(2, kDebugLevelSound, "signal %04x", _signalToSet);
}
info.start = _position._play_pos;
info.delta = 0;
while (*_position._play_pos == 0xF8) {
info.delta += 240;
_position._play_pos++;
}
info.delta += *(_position._play_pos++);
// Process the next info.
if ((_position._play_pos[0] & 0xF0) >= 0x80)
info.event = *(_position._play_pos++);
else
info.event = _position._running_status;
if (info.event < 0x80)
return;
_position._running_status = info.event;
switch (info.command()) {
case 0xC:
info.basic.param1 = *(_position._play_pos++);
info.basic.param2 = 0;
if (info.channel() == 0xF) {// SCI special case
if (info.basic.param1 != 0x7F) {
_signalSet = true;
_signalToSet = info.basic.param1;
} else {
_loopTick = _position._play_tick;
}
}
break;
case 0xD:
info.basic.param1 = *(_position._play_pos++);
info.basic.param2 = 0;
break;
case 0xB:
info.basic.param1 = *(_position._play_pos++);
info.basic.param2 = *(_position._play_pos++);
if (info.channel() == 0xF) {// SCI special
if (info.basic.param1 == 0x60) {
switch (_soundVersion) {
case SCI_VERSION_0_EARLY:
case SCI_VERSION_0_LATE:
_pSnd->dataInc += info.basic.param2;
_signalSet = true;
_signalToSet = 0x7f + _pSnd->dataInc;
break;
case SCI_VERSION_1_EARLY:
case SCI_VERSION_1_LATE:
_pSnd->dataInc++;
break;
default:
break;
}
}
// BF 50 x - set reverb to x
// BF 60 x - dataInc++
// BF 52 x - bHold=x
}
if (info.basic.param1 == 7) // channel volume change -scale it
info.basic.param2 = info.basic.param2 * _volume / 0x7F;
info.length = 0;
break;
case 0x8:
case 0x9:
case 0xA:
case 0xE:
info.basic.param1 = *(_position._play_pos++);
info.basic.param2 = *(_position._play_pos++);
if (info.command() == 0x9 && info.basic.param2 == 0)
info.event = info.channel() | 0x80;
info.length = 0;
break;
case 0xF: // System Common, Meta or SysEx event
switch (info.event & 0x0F) {
case 0x2: // Song Position Pointer
info.basic.param1 = *(_position._play_pos++);
info.basic.param2 = *(_position._play_pos++);
break;
case 0x3: // Song Select
info.basic.param1 = *(_position._play_pos++);
info.basic.param2 = 0;
break;
case 0x6:
case 0x8:
case 0xA:
case 0xB:
case 0xC:
case 0xE:
info.basic.param1 = info.basic.param2 = 0;
break;
case 0x0: // SysEx
info.length = readVLQ(_position._play_pos);
info.ext.data = _position._play_pos;
_position._play_pos += info.length;
break;
case 0xF: // META event
info.ext.type = *(_position._play_pos++);
info.length = readVLQ(_position._play_pos);
info.ext.data = _position._play_pos;
_position._play_pos += info.length;
if (info.ext.type == 0x2F) {// end of track reached
if (_pSnd->loop) {
jumpToTick(_loopTick);
_pSnd->loop--;
} else {
_pSnd->status = kSndStatusStopped;
PUT_SEL32V(segMan, _pSnd->soundObj, signal, 0xFFFF);
PUT_SEL32V(segMan, _pSnd->soundObj, state, kSndStatusStopped);
debugC(2, kDebugLevelSound, "signal EOT");
}
}
break;
default:
warning(
"MidiParser_SCI::parseNextEvent: Unsupported event code %x",
info.event);
} // // System Common, Meta or SysEx event
}// switch (info.command())
}
//----------------------------------------
byte MidiParser_SCI::midiGetNextChannel(long ticker) {
byte curr = 0xFF;
long closest = ticker + 1000000, next = 0;
for (int i = 0; i < _track->channelCount; i++) {
if (_track->channels[i].time == -1) // channel ended
continue;
next = *_track->channels[i].data; // when the next event shoudl occur
if (next == 0xF8) // 0xF8 means 240 ticks delay
next = 240;
next += _track->channels[i].time;
if (next < closest) {
curr = i;
closest = next;
}
}
return curr;
}
//----------------------------------------
byte *MidiParser_SCI::midiMixChannels() {
int totalSize = 0;
byte **dataPtr = new byte *[_track->channelCount];
for (int i = 0; i < _track->channelCount; i++) {
dataPtr[i] = _track->channels[i].data;
_track->channels[i].time = 0;
_track->channels[i].prev = 0;
totalSize += _track->channels[i].size;
}
byte *mixedData = new byte[totalSize * 2]; // FIXME: creates overhead and still may be not enough to hold all data
_mixedData = mixedData;
long ticker = 0;
byte curr, delta;
byte cmd, par1, global_prev = 0;
long new_delta;
SoundResource::Channel *channel;
while ((curr = midiGetNextChannel(ticker)) != 0xFF) { // there is still active channel
channel = &_track->channels[curr];
delta = *channel->data++;
channel->time += (delta == 0xF8 ? 240 : delta); // when the comamnd is supposed to occur
if (delta == 0xF8)
continue;
new_delta = channel->time - ticker;
ticker += new_delta;
cmd = *channel->data++;
if (cmd != 0xFC) {
// output new delta
while (new_delta > 240) {
*mixedData++ = 0xF8;
new_delta -= 240;
}
*mixedData++ = (byte)new_delta;
}
switch (cmd) {
case 0xF0: // sysEx
*mixedData++ = cmd;
do {
par1 = *channel->data++;
*mixedData++ = par1; // out
} while (par1 != 0xF7);
break;
case 0xFC: // end channel
channel->time = -1; // FIXME
break;
default: // MIDI command
if (cmd & 0x80)
par1 = *channel->data++;
else {// running status
par1 = cmd;
cmd = channel->prev;
}
if (cmd != global_prev)
*mixedData++ = cmd; // out cmd
*mixedData++ = par1;// pout par1
if (nMidiParams[(cmd >> 4) - 8] == 2)
*mixedData++ = *channel->data++; // out par2
channel->prev = cmd;
global_prev = cmd;
}// switch(cmd)
}// while (curr)
// mixing finished. inserting stop event
*mixedData++ = 0;
*mixedData++ = 0xFF;
*mixedData++ = 0x2F;
*mixedData++ = 0x00;
*mixedData++ = 0x00;
for (int channelNr = 0; channelNr < _track->channelCount; channelNr++)
_track->channels[channelNr].data = dataPtr[channelNr];
delete[] dataPtr;
return _mixedData;
}
// This is used for SCI0 sound-data. SCI0 only has one stream that may contain several channels and according to output
// device we remove certain channels from that data
byte *MidiParser_SCI::midiFilterChannels(int channelMask) {
SoundResource::Channel *channel = &_track->channels[0];
byte *channelData = channel->data;
byte *channelDataEnd = channel->data + channel->size;
byte *filterData = new byte[channel->size + 5];
byte curChannel, curByte, curDelta;
byte command, lastCommand;
int delta = 0;
//int dataLeft = channel->size;
int midiParamCount;
_mixedData = filterData;
command = 0;
midiParamCount = 0;
lastCommand = 0;
curChannel = 15;
while (channelData < channelDataEnd) {
curDelta = *channelData++;
if (curDelta == 0xF8) {
delta += 240;
continue;
}
delta += curDelta;
curByte = *channelData++;
switch (curByte) {
case 0xF0: // sysEx
case 0xFC: // end of channel
command = curByte;
curChannel = 15;
break;
default:
if (curByte & 0x80) {
command = curByte;
curChannel = command & 0x0F;
midiParamCount = nMidiParams[(command >> 4) - 8];
}
}
if ((1 << curChannel) & channelMask) {
if (command != 0xFC) {
debugC(2, kDebugLevelSound, "\nDELTA ");
// Write delta
while (delta > 240) {
*filterData++ = 0xF8;
debugC(2, kDebugLevelSound, "F8 ");
delta -= 240;
}
*filterData++ = (byte)delta;
debugC(2, kDebugLevelSound, "%02X ", delta);
delta = 0;
}
// Write command
switch (command) {
case 0xF0: // sysEx
*filterData++ = command;
debugC(2, kDebugLevelSound, "%02X ", command);
do {
curByte = *channelData++;
*filterData++ = curByte; // out
} while (curByte != 0xF7);
lastCommand = command;
break;
case 0xFC: // end of channel
break;
default: // MIDI command
if (lastCommand != command) {
*filterData++ = command;
debugC(2, kDebugLevelSound, "%02X ", command);
lastCommand = command;
}
if (midiParamCount > 0) {
if (curByte & 0x80) {
debugC(2, kDebugLevelSound, "%02X ", *channelData);
*filterData++ = *channelData++;
} else {
debugC(2, kDebugLevelSound, "%02X ", curByte);
*filterData++ = curByte;
}
}
if (midiParamCount > 1) {
debugC(2, kDebugLevelSound, "%02X ", *channelData);
*filterData++ = *channelData++;
}
}
} else {
if (curByte & 0x80) {
channelData += midiParamCount;
} else {
channelData += midiParamCount - 1;
}
}
}
// Stop event
*filterData++ = 0; // delta
*filterData++ = 0xFF; // Meta-Event
*filterData++ = 0x2F; // End-Of-Track
*filterData++ = 0x00;
*filterData++ = 0x00;
return _mixedData;
}
void MidiParser_SCI::setVolume(byte bVolume) {
if (bVolume > 0x7F)
bVolume = 0x7F;
if (_volume != bVolume) {
_volume = bVolume;
// sending volume change to all active channels
for (int i = 0; i < _track->channelCount; i++)
if (_track->channels[i].number <= 0xF)
_driver->send(0xB0 + _track->channels[i].number, 7, _volume);
}
}
} // end of namespace SCI
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