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#include "synprivate.h"
#include <revolution/types.h>
#include "mix.h"
// #include <revolution/ax.h>
// #include <revolution/os.h>
// #include <revolution/os/OSInterrupt.h>
// MidiChannelVoiceMessage
#define MIDI_MESSAGE_CHANNEL_VOICE_NOTE_OFF 8
#define MIDI_MESSAGE_CHANNEL_VOICE_NOTE_ON 9
#define MIDI_MESSAGE_CHANNEL_VOICE_CONTROL_CHANGE 11
#define MIDI_MESSAGE_CHANNEL_VOICE_PROGRAM_CHANGE 12
// MidiChannelControl
#define MIDI_CC_CHANNEL_VOLUME 7
#define MIDI_CC_PAN 10
#define MIDI_CC_EXPRESSION 11
#define MIDI_CC_REVERB_SEND_LEVEL 91
#define MIDI_CC_TREMOLO_DEPTH 92
static void __HBMSYNProgramChange(HBMSYNSYNTH *synth, u8 midiChannel,
u8 program);
static void __HBMSYNResetController(HBMSYNSYNTH *synth, u8 midiChannel);
static void __HBMSYNNoteOff(HBMSYNSYNTH *synth, u8 midiChannel, u8 keyNum);
static void __HBMSYNNoteOn(HBMSYNSYNTH *synth, u8 midiChannel, u8 keyNum,
u8 keyVel);
static void __HBMSYNMidiIn(HBMSYNSYNTH *synth, u8 *input);
// .data
// Why is this here anyways if its only use is in another file
f32 __HBMSYNn128[128] = // x/128, rounded to 5 decimal places
{
0.0f, 0.007813f, 0.015625f, 0.023438f,
0.03125f, 0.039063f, 0.046875f, 0.054688f,
0.0625f, 0.070313f, 0.078125f, 0.085938f,
0.09375f, 0.101563f, 0.109375f, 0.117188f,
0.125f, 0.132813f, 0.140625f, 0.148438f,
0.15625f, 0.164063f, 0.171875f, 0.179688f,
0.1875f, 0.195313f, 0.203125f, 0.210938f,
0.21875f, 0.226563f, 0.234375f, 0.242188f,
0.25f, 0.257813f, 0.265625f, 0.273438f,
0.28125f, 0.289063f, 0.296875f, 0.304688f,
0.3125f, 0.320313f, 0.328125f, 0.335938f,
0.34375f, 0.351563f, 0.359375f, 0.367188f,
0.375f, 0.382813f, 0.390625f, 0.398438f,
0.40625f, 0.414063f, 0.421875f, 0.429688f,
0.4375f, 0.445313f, 0.453125f, 0.460938f,
0.46875f, 0.476563f, 0.484375f, 0.492188f,
0.5f, 0.507813f, 0.515625f, 0.523438f,
0.53125f, 0.539063f, 0.546875f, 0.554688f,
0.5625f, 0.570313f, 0.578125f, 0.585938f,
0.59375f, 0.601563f, 0.609375f, 0.617188f,
0.625f, 0.632813f, 0.640625f, 0.648438f,
0.65625f, 0.664063f, 0.671875f, 0.679688f,
0.6875f, 0.695313f, 0.703125f, 0.710938f,
0.71875f, 0.726563f, 0.734375f, 0.742188f,
0.75f, 0.757813f, 0.765625f, 0.773438f,
0.78125f, 0.789063f, 0.796875f, 0.804688f,
0.8125f, 0.820313f, 0.828125f, 0.835938f,
0.84375f, 0.851563f, 0.859375f, 0.867188f,
0.875f, 0.882813f, 0.890625f, 0.898438f,
0.90625f, 0.914063f, 0.921875f, 0.929688f,
0.9375f, 0.945313f, 0.953125f, 0.960938f,
0.96875f, 0.976563f, 0.984375f, 0.992188f
};
static void __HBMSYNProgramChange(HBMSYNSYNTH *synth, u8 midiChannel,
u8 program)
{
ASSERTLINE(54, synth);
ASSERTLINE(55, midiChannel < 16);
ASSERTLINE(56, program < 128);
synth->inst[midiChannel] = &synth->melodicInst[program];
}
void __HBMSYNSetController(HBMSYNSYNTH *synth, u8 midiChannel, u8 function,
u8 value)
{
ASSERTLINE(67, synth);
ASSERTLINE(68, midiChannel < 16);
ASSERTLINE(69, function < 128);
ASSERTLINE(70, value < 128);
switch (function)
{
case MIDI_CC_CHANNEL_VOLUME:
synth->volAttn[midiChannel] = __HBMSYNVolumeAttenuation[value];
break;
case MIDI_CC_PAN:
synth->pan[midiChannel] = value;
break;
case MIDI_CC_REVERB_SEND_LEVEL:
synth->auxAAttn[midiChannel] = __HBMSYNVolumeAttenuation[value];
break;
default: // the rest aren't supported
break;
}
}
static void __HBMSYNResetController(HBMSYNSYNTH *synth, u8 midiChannel)
{
ASSERTLINE(102, synth);
ASSERTLINE(103, midiChannel < 16);
__HBMSYNSetController(synth, midiChannel, MIDI_CC_CHANNEL_VOLUME, 100);
__HBMSYNSetController(synth, midiChannel, MIDI_CC_PAN, 64);
__HBMSYNSetController(synth, midiChannel, MIDI_CC_EXPRESSION, 127);
__HBMSYNSetController(synth, midiChannel, MIDI_CC_REVERB_SEND_LEVEL, 0);
__HBMSYNSetController(synth, midiChannel, MIDI_CC_TREMOLO_DEPTH, 0);
}
void __HBMSYNResetAllControllers(HBMSYNSYNTH *synth)
{
u8 midiChannel;
ASSERTLINE(121, synth);
for (midiChannel = 0; midiChannel < HBMSYN_NUM_MIDI_CHANNELS; ++midiChannel)
{
__HBMSYNProgramChange(synth, midiChannel, 0);
__HBMSYNResetController(synth, midiChannel);
}
}
static void __HBMSYNNoteOff(HBMSYNSYNTH *synth, u8 midiChannel, u8 keyNum)
{
HBMSYNVOICE *voice;
ASSERTLINE(138, synth);
ASSERTLINE(139, midiChannel < 16);
ASSERTLINE(140, keyNum < 128);
voice = synth->voice[midiChannel][keyNum];
if (voice)
{
__HBMSYNSetVoiceToRelease(voice);
synth->voice[midiChannel][keyNum] = NULL;
}
}
static void __HBMSYNNoteOn(HBMSYNSYNTH *synth, u8 midiChannel, u8 keyNum,
u8 keyVel)
{
ASSERTLINE(162, synth);
ASSERTLINE(163, midiChannel < 16);
ASSERTLINE(164, keyNum < 128);
ASSERTLINE(165, keyVel < 128);
if (keyVel)
{
AXVPB *axvpb;
if (synth->voice[midiChannel][keyNum])
{
__HBMSYNSetVoiceToRelease(synth->voice[midiChannel][keyNum]);
synth->voice[midiChannel][keyNum] = NULL;
}
axvpb = AXAcquireVoice(AX_PRIORITY_MAX, &__HBMSYNClearVoiceReferences,
(u32)synth);
if (axvpb)
{
int index = HBMAllocIndex(axvpb->index);
if (index >= 0)
{
HBMSYNVOICE *voice = __HBMSYNVoice + index;
voice->axvpb = axvpb;
voice->synth = synth;
voice->midiChannel = midiChannel;
voice->keyNum = keyNum;
voice->keyVel = keyVel;
if (__HBMSYNGetWavetableData(voice))
{
synth->voice[midiChannel][keyNum] = voice;
++synth->notes;
__HBMSYNSetupPitch(voice);
__HBMSYNSetupVolume(voice);
__HBMSYNSetupPan(voice);
__HBMSYNSetupVolumeEnvelope(voice);
HBMMIXInitChannel(axvpb, __HBMSYNGetVoiceInput(voice),
synth->auxAAttn[midiChannel] >> 16,
synth->pan[midiChannel],
__HBMSYNGetVoiceFader(voice));
__HBMSYNSetupSample(voice);
__HBMSYNSetupSrc(voice);
axvpb->pb.state = 1;
axvpb->sync |= AX_VPB_SYNC_FLAG_STATE;
}
else
{
voice->synth = NULL;
HBMMIXReleaseChannel(axvpb);
HBMFreeIndex(index);
AXFreeVoice(axvpb);
}
}
else
{
AXFreeVoice(axvpb);
}
}
}
else
{
__HBMSYNNoteOff(synth, midiChannel, keyNum);
}
}
static void __HBMSYNMidiIn(HBMSYNSYNTH *synth, u8 *input)
{
u8 *ch;
u8 midiFunction;
u8 midiChannel;
u8 _2ndByte;
u8 _3rdByte;
ASSERTLINE(275, synth);
ASSERTLINE(276, input);
ch = input;
midiFunction = *ch >> 4;
midiChannel = *ch & 0x0f;
++ch;
_2ndByte = *ch;
++ch;
switch (midiFunction)
{
case MIDI_MESSAGE_CHANNEL_VOICE_NOTE_OFF:
__HBMSYNNoteOff(synth, midiChannel, _2ndByte);
break;
case MIDI_MESSAGE_CHANNEL_VOICE_NOTE_ON:
_3rdByte = *ch;
__HBMSYNNoteOn(synth, midiChannel, _2ndByte, _3rdByte);
break;
case MIDI_MESSAGE_CHANNEL_VOICE_CONTROL_CHANGE:
_3rdByte = *ch;
__HBMSYNSetController(synth, midiChannel, _2ndByte, _3rdByte);
break;
case MIDI_MESSAGE_CHANNEL_VOICE_PROGRAM_CHANGE:
__HBMSYNProgramChange(synth, midiChannel, _2ndByte);
break;
default: // the rest aren't supported
break;
}
}
void __HBMSYNRunInputBufferEvents(HBMSYNSYNTH *synth)
{
u8 (*input)[3];
for (input = synth->input; synth->inputCounter; --synth->inputCounter)
{
__HBMSYNMidiIn(synth, *input);
++input;
}
synth->inputPosition = *synth->input;
}
BOOL __HBMSYNGetWavetableData(HBMSYNVOICE *voice)
{
HBMSYNSYNTH *synth = voice->synth;
u32 regionIndex = synth->inst[voice->midiChannel]->keyRegion[voice->keyNum];
// TODO: a define, maybe?
if (regionIndex == 0xffff)
return FALSE;
voice->region = synth->region + regionIndex;
voice->art = synth->art + voice->region->articulationIndex;
voice->sample = synth->sample + voice->region->sampleIndex;
voice->adpcm = synth->adpcm + voice->sample->adpcmIndex;
return TRUE;
}
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