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-rw-r--r--sound/mods/maxtrax.cpp67
-rw-r--r--sound/mods/maxtrax.h16
2 files changed, 64 insertions, 19 deletions
diff --git a/sound/mods/maxtrax.cpp b/sound/mods/maxtrax.cpp
index 60bf715795..f9e2a509cf 100644
--- a/sound/mods/maxtrax.cpp
+++ b/sound/mods/maxtrax.cpp
@@ -42,6 +42,9 @@ int32 calcVolumeDelta(int32 delta, uint16 time, uint16 vBlankFreq) {
// div <= 1000 means time to small (or even 0)
return (div <= 1000) ? delta : (1000 * delta) / div;
}
+int32 calcTempo(const uint16 tempo, uint16 vBlankFreq) {
+ return (int32)(((uint32)(tempo & 0xFFF0) << 8) / (uint16)(5 * vBlankFreq));
+}
}
namespace Audio {
@@ -61,6 +64,7 @@ MaxTrax::MaxTrax(int rate, bool stereo)
_playerCtx.tempo = 120;
_playerCtx.tempoTime = 0;
+ _playerCtx.syncCallBack = 0;
for (int i = 0; i < ARRAYSIZE(_channelCtx); ++i)
resetChannel(_channelCtx[i], (i & 1) != 0);
@@ -99,44 +103,41 @@ void MaxTrax::interrupt() {
int32 eventDelta = _playerCtx.nextEventTime - millis;
for (; eventDelta <= 0; eventDelta += (++curEvent)->startTime) {
const byte cmd = curEvent->command;
- const byte data = curEvent->parameter;
- const uint16 stopTime = curEvent->stopTime;
- ChannelContext &channel = _channelCtx[data & 0x0F];
+ ChannelContext &channel = _channelCtx[curEvent->parameter & 0x0F];
// outPutEvent(*curEvent);
// debug("CurTime, EventDelta, NextDelta: %d, %d, %d", millis, eventDelta, eventDelta + curEvent[1].startTime );
if (cmd < 0x80) { // Note
- const uint16 vol = (data & 0xF0) >> 1;
- const int8 voiceIndex = noteOn(channel, cmd, vol, kPriorityScore);
+ const int8 voiceIndex = noteOn(channel, cmd, (curEvent->parameter & 0xF0) >> 1, kPriorityScore);
if (voiceIndex >= 0) {
VoiceContext &voice = _voiceCtx[voiceIndex];
voice.stopEventCommand = cmd;
- voice.stopEventParameter = data & 0x0F;
- voice.stopEventTime = (eventDelta + stopTime) << 8;
+ voice.stopEventParameter = curEvent->parameter & 0x0F;
+ voice.stopEventTime = (eventDelta + curEvent->stopTime) << 8;
}
} else {
switch (cmd) {
case 0x80: // TEMPO
- if ((_playerCtx.tickUnit >> 8) > stopTime) {
- setTempo(data << 4);
+ if ((_playerCtx.tickUnit >> 8) > curEvent->stopTime) {
+ _playerCtx.tickUnit = calcTempo(curEvent->parameter << 4, _playerCtx.vBlankFreq);
_playerCtx.tempoTime = 0;
} else {
_playerCtx.tempoStart = _playerCtx.tempo;
- _playerCtx.tempoDelta = (data << 4) - _playerCtx.tempoStart;
- _playerCtx.tempoTime = (stopTime << 8);
+ _playerCtx.tempoDelta = (curEvent->parameter << 4) - _playerCtx.tempoStart;
+ _playerCtx.tempoTime = (curEvent->stopTime << 8);
_playerCtx.tempoTicks = 0;
}
break;
case 0xC0: // PROGRAM
- channel.patch = &_patch[stopTime & (kNumPatches - 1)];
+ channel.patch = &_patch[curEvent->stopTime & (kNumPatches - 1)];
break;
case 0xE0: // BEND
- channel.pitchBend = ((stopTime & 0x7F00) >> 1) | (stopTime & 0x7f);
+ channel.pitchBend = ((curEvent->stopTime & 0x7F00) >> 1) | (curEvent->stopTime & 0x7f);
channel.pitchReal = (((int32)channel.pitchBendRange * channel.pitchBend) >> 5) - (channel.pitchBendRange << 8);
channel.isAltered = true;
break;
@@ -151,7 +152,36 @@ void MaxTrax::interrupt() {
// stop processing for this tick
goto endOfEventLoop;
- case 0xA0: // SPECIAL
+ case 0xA0: // SPECIAL
+ switch (curEvent->stopTime >> 8){
+ case 0x01: // SPECIAL_SYNC
+ if (_playerCtx.syncCallBack)
+ _playerCtx.syncCallBack(curEvent->stopTime & 0xFF);
+ break;
+ case 0x02: // SPECIAL_BEGINREP
+ // we allow a depth of 4 loops
+ for (int i = 0; i < ARRAYSIZE(_playerCtx.repeatPoint); ++i) {
+ if (!_playerCtx.repeatPoint[i]) {
+ _playerCtx.repeatPoint[i] = curEvent;
+ _playerCtx.repeatCount[i] = curEvent->stopTime & 0xFF;
+ break;
+ }
+ }
+ break;
+ case 0x03: // SPECIAL_ENDREP
+ for (int i = ARRAYSIZE(_playerCtx.repeatPoint) - 1; i >= 0; --i) {
+ if (_playerCtx.repeatPoint[i]) {
+ if (_playerCtx.repeatCount[i]--)
+ curEvent = _playerCtx.repeatPoint[i]; // gets incremented by 1 at end of loop
+ else
+ _playerCtx.repeatPoint[i] = 0;
+ break;
+ }
+ }
+ break;
+ }
+ break;
+
case 0xB0: // CONTROL
// TODO: controlChange((byte)stopTime, (byte)(stopTime >> 8))
default:
@@ -174,7 +204,7 @@ endOfEventLoop:
_playerCtx.tempoTime = 0;
newTempo += _playerCtx.tempoDelta;
}
- setTempo(_playerCtx.tempoStart + newTempo);
+ _playerCtx.tickUnit = calcTempo(_playerCtx.tempoStart + newTempo, _playerCtx.vBlankFreq);
}
}
@@ -307,6 +337,11 @@ endOfEventLoop:
}
}
+void MaxTrax::setTempo(const uint16 tempo) {
+ Common::StackLock lock(_mutex);
+ _playerCtx.tickUnit = calcTempo(tempo, _playerCtx.vBlankFreq);
+}
+
void MaxTrax::stopMusic() {
Common::StackLock lock(_mutex);
_playerCtx.musicPlaying = false;
@@ -327,6 +362,8 @@ bool MaxTrax::playSong(int songIndex, bool loop) {
_playerCtx.scoreIndex = songIndex;
_playerCtx.ticks = 0;
+ for (int i = 0; i < ARRAYSIZE(_playerCtx.repeatPoint); ++i)
+ _playerCtx.repeatPoint[i] = 0;
for (int i = 0; i < ARRAYSIZE(_voiceCtx); ++i)
killVoice((byte)i);
for (int i = 0; i < kNumChannels; ++i)
diff --git a/sound/mods/maxtrax.h b/sound/mods/maxtrax.h
index a0e0d04d34..1ec696b6f6 100644
--- a/sound/mods/maxtrax.h
+++ b/sound/mods/maxtrax.h
@@ -43,11 +43,15 @@ public:
bool playSong(int songIndex, bool loop = false);
void advanceSong(int advance = 1);
int playNote(byte note, byte patch, uint16 duration, uint16 volume, bool rightSide);
- void setVolume(const byte volume) { _playerCtx.volume = volume; }
- void setTempo(const uint16 tempo) {
- _playerCtx.tickUnit = (int32)(((uint32)(tempo & 0xFFF0) << 8) / (uint16)(5 * _playerCtx.vBlankFreq));
- }
+ void setVolume(const byte volume) { Common::StackLock lock(_mutex); _playerCtx.volume = volume; }
+ void setTempo(const uint16 tempo);
void stopMusic();
+ /**
+ * Set a callback function for sync-events.
+ * @param callback Callback function, will be called synchronously, so DONT modify the player
+ * directly in response
+ */
+ void setSignalCallback(void (*callback) (int)) { Common::StackLock lock(_mutex); _playerCtx.syncCallBack = callback; }
protected:
void interrupt();
@@ -95,6 +99,10 @@ private:
int scoreIndex;
const Event *nextEvent;
int32 nextEventTime;
+
+ void (*syncCallBack) (int);
+ const Event *repeatPoint[4];
+ byte repeatCount[4];
} _playerCtx;
struct Envelope {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 17:35:09 +0000